Phosphate is just fine, requires plenty of lube, but will last a long time. The thickness for most applications is around 0.0004-0.0008″. You must log in or register to reply here. Is Nitride the same as Melonite, Isonite, Fenocite, QPQ? Tenifer / Melonite basically the same. Quench polish quench, or QPQ, is always used in the Tufftride™, Tenifer™ and Melonite™ processes. The diffusion zone demonstrates a decreasing gradient concentration of carbon and particularly nitrogen as the gradient extends deeper into the surface of the substrate. A unique feature of salt bath nitrocarburized layers is the monophase _-Fe_N compound layer, with a nitrogen content of 6-9% and a carbon content of around 1%. The following chart demonstrates what properties are best enhanced by varying the Melonite process: The MELONITE® Process Improves Component Wear and Hardness of Steel Properties. Please share your stories and who is … The hardness of the compound layer measured on a cross-section is around 700 HV for unalloyed steels and up to about 1600 HV on high chromium steels. Similarly, nitride and melonite are the same thing. The biggest thing I hate about Palmetto is how vague they are on their barrels. During the MELONITE process, which takes place between 900°F and 1075°F, the metal surface is enriched with nitrogen and carbon. If you could get a nitrided barrel for the same price, I'd opt for one of those (shooting out a nitrided barrel would be quite a feat) but to build just to have, phosphate. Created with Sketch. Indiana Gun Owners is the most active and largest Indiana gun Community online. Hardness in the compound layer ranges from approximately HV 700 on alloyed steels to about HV 1600 on high chromium steels. Toggle menu. These results show the direct effect of increased oxidation as it relates to friction on the surface of the nitrocarburized samples. This property yields a tough outer surface or shell, yet alloys the material to retain ductility, thereby lending to the overall strength of the material. Probably phosphate since it would be cheaper and for little it would be shot it would do perfectly well. Naturally, the alloy of the substrate will influence which properties are principally affected and to what extent they are affected. 11C2P '83-'87 Airborne Infantry. Treatment durations of 1-2 hours usually yield compound layers about 10-20 _m thick (0.0004 – 0.0008″). I see way more on nitride than anything. The MELONITE and QPQ process increases fatigue strength about 100% on notched components made from unalloyed steel parts and about 30-80% on parts made of alloyed steels. MELONITE is a thermochemical treatment for improving surface properties of metal parts. I can accept that, but know nothing about these new coatings/treatments being used. The nitride barrel life is all dependent on how you treat it. In addition, small quantities of substrate carbon are pulled from deeper within the substrate toward the surface. I'm kinda leaning nitride on price and increased corrosion resistance. Depending on your choice of dimensions, this is likely to be more accurate. These processes are categorized as molten salt bath ferritic nitrocarburizing. Total: 1,367 (members: 296, guests: 1,071), https://en.wikipedia.org/wiki/Ferritic_nitrocarburizing, https://en.wikipedia.org/wiki/Titanium_nitride. They are "brand names" to the process. It may not display this or other websites correctly. Email this Page. Be sure to check out our gun classifieds where you can buy, sell or trade your gear. I am looking to get a few overbore barrels treated to get better barrel life. The higher the alloy content, the thinner the layer for the same treatment cycle. Melonite™ and Melonite QPQ™ are thermochemical processes intended for the case hardening of iron based metals. A porous area develops in the outer zone of the compound layer. Melonite is a form of nitriding so it's really asking phosphate vs. nitrided. We're going to find out at what point this rifle will fail and take a look at what the barrel will look like when we get done with it. Melonite Processing. This one wasn't a Freedom series, so I think there is a difference. Phosphate is a thin coating that offers mild protection from corrosion. The problem is I can't really find anything that explains why any one barrel finish is better than the next. Just a comment on Melonite/Tenifer etc pistol slides and visible wear - the nitrocarburizing itself is not black, just bright steel color. Melonite and nitride are the same thing and better than phosphate. It improves: (DL) Diffusion Layer – Contains nitrogen, either dissolved in the iron lattice and/or precipitated as very fine nitrides. Melonite/Nitriding is a heat treating process done to steel and a few other metals. Display Modes: Linear Mode. What is the best treatment to use. Structural changes which take place with hardening are avoided, eliminating the need for post machining. Click on a term to search for related topics. Fig. Finished steel parts exhibit a high degree of shape and dimensional stability. The lowest friction level occurred when nitrocarburized QPQ is lubricated. 08-24-18, 21:03 #7. Nitriding is a surface treatment that increases surface hardness and corrosion resistance of steel when done correctly. If cooling is done quickly, the nitrogen remains in super-saturated solution. It was established by applying increasing pressure to the flank tooth until galling occurred. Beating a dead horse...nitride vs dlc? That being said I have an 11.5 Melonite from them and I've been happy with it. Melonite is basically salt bath ferritic nitrocarburizing, also known as liquid nitrocarburizing. Total nitrocarburizing depth shown in Fig. Only downside to nitride barrels are they do not break in over time, once you do you initial break in, the grouping you get is … Armornite® finish is a hardened nitride finish that provides enhanced corrosion resistance, greatly improved wear resis-tance, decreased surface roughness, reduced light reflection and increased surface lubricity. Melonite vs. Chrome Lined Longevity ... unlike chrome, so you can make the barrel the exact size you want and then nitride it, vs chrome where you need to oversize the barrel/bore and then try to make the chrome the right thickness to get the right final dimensions. The performance with SAE 5134 was about tripled. During nitrocarburizing, a two-part surface layer is formed, initially an outer compound layer, followed by a diffusion layer below it. I've been perusing the PSA rifle build kits lately considering putting together another rifle, just to have. Also known as Melonite, Salt Bath Nitride or simply Nitride, this is a heat treating process that creates a case hardened surface by diffusing nitrogen into the metal surface. Black Nitride is more than just a baked on coating such as Cerakote (I have nothing against Cerakote, as I have 2 rifles with it). JavaScript is disabled. Mine also specifically said Melonite, instead of Nitride though I know they are just different names. Corrosion resistance of unalloyed and low alloyed steels is greatly improved. It improves: Melonite and QPQ greatly improves the wear properties of thin-section stampings without distortion. Melonite and nitride are the same thing and better than phosphate. The QPQ sample, with its extra post-oxidation step, has a much higher friction value than the QP specimen, which had part of its original oxidation in the compound layer removed by lapping. Coefficient of friction values for various surface layers, with and without lubrication. •Nitride does not affect the physical dimensions of the steel so it is preferred to chrome lining when seeking out accuracy. 321-251-6050 Search. It is the finish we use on all our black slides and its durability is unparalleled by any black finish we have used. The hardness is maintained up to about 930°F and extends the surface life of steel tools and components exposed to heat. Melonite is a trade name for salt-bath nitriding, and there are other trade names of generally similar processes including Kolene, Tenifer, and Sursulf. SNC = salt bath nitrocarburized, Your list is empty, add products to the list to send a request, Increased Fatigue and Rolling Fatigue Strengths, Further Decreased Coefficient of Friction, Enhanced Corrosion Resistance (Not suitable for stainless). Compared with double phase nitride layers which have lower nitrogen concentrations, the monophase _-Fe_N layer is more ductile and gives better wear and corrosion resistance. Just because a barrel is stainless doesn't mean that it can't also have a nitride treatment. Other methods of ferric nitrocarburizing include gaseous process such as Nitrotec and ion (plasma) ones. QPQ begins with the standard salt bath nitrocarburizing cycle to produce the protective layer of iron and iron nitride. What Happens to Trump Between Now and Inauguration Day? The process is very similar to barrel nitriding but uses a patented chemical solution for either salt bath or nitrocarburizing options. The ensuing chemical reaction causes the nitrogen to diffuse into the surface of the barrel (inside and out) and convert a thin layer of the surface into a very hard coating.. What barrel treatment is better then another? Armornite is used on many Smith & Wesson ® and M&P products imparting a high level As stated above, chrome lining is a known quantity. (See Fig. The nitrogen penetration into the diffusion layer provides for improved fatigue strength. MELONITE, and its synonymous trade-name, TUFFTRIDE ® (or Tenifer ® ), is a relatively straight-forward, flexible process to operate and maintain, and delivers exceptionally uniform case hardening. 8 shows the scuffing loads of gears made from various materials (6). ), Total nitrided depth on various materials resulting from nitrocarburizing. Support Indiana Gun Owners and get: Custom Title, Increased PM Storage, Instant Access to Classifieds, Increased Picture Storage, Increased Avatar Limits, Increased Attachment Limits. Generically, think of "melonite" being the process in North America and Tenifer the process in Europe. Above: Toolcraft BCG with Black Nitride finish. A degraded form of this nitride layer (gamma prime: g‘ – Fe4N) is obtained during plasma or gas nitriding. Fig. Moderator Tools: Show Printable Version. 7 shows the coefficient of friction both under dry conditions and after lubrication with SAE 30 oil, measured by an Amsler machine. Better for the purpose of just having? Melonite vs Nitride. Black nickel is a derivative of nickel boron. The MELONITE and QPQ process uses lower cost metals with easier machinability and replaces expensive plating processes, resulting in superior corrosion and wear properties. See our review here: Toolcraft Chrome Phosphate BCG Review. Resulting properties from these chemical and structural composition changes are increased surface hardness, lower coefficient of friction, enhanced surface lubricity, improved running wear performance, increased sliding wear resistance, and enhanced corrosion resistance. During these processes, nitrogen, carbon, and small amounts of oxygen are diffused into the surface of the steel, creating an epsilon iron nitride layer (e – FexN). Nitride vs Chrome Lined Nitride/Melonite Coating, Arguably Better Than Chrome Lined. Without lubrication the nitrocarburized QP had the lowest coefficient of friction, being less than half of that of the hard chrome or case hardened surfaces. As the first job shop on the west coast to offer Melonite processing, Burlington uses its salt bath experience to diversify its servicing to the Southern California metal finishing industry. Black Nickel. You are using an out of date browser. However, with this variant, due to the fine microporosity in the QPQ sample which causes the lubrication to adhere better to the surface, this option gives the lowest friction value. Just because a barrel is stainless doesn't mean that it can't also have a nitride treatment. That being said, our nitride barrel life span for average use is 12,000 rounds. Melonite is also called Tenifer by Glock. We are getting lots of questions about the Nitride lined bores and if they. Lubrication has only a slight influence on the coefficient of friction because the oxide layer of the outer surface was removed during the polishing operation. Zone 1, called the compound or “white” layer, extends to a case depth of ~0.0004″ to 0.0008″. Switch to Threaded Mode Nitride is a chemical treatment of steel that hardens the steel quite a bit (just the outer layer) and leaves a very smooth finish that has some built in lubricity, still needs lube just not quite as much. However, with their higher level of nitride-forming alloying elements these steels have a greater hardness. Zone 2, called the diffusion zone, extends to a case depth of ~.004″ to 0.008″. Mega has 416R stainless barrels that are nitride treated. Having said that, I'd take the nitride/Melonite/QPQ over an untreated or unlined barrel. Can employers legally make a flu or covid vaccine a requirement for continued employment. I know melonite is just a brand name for a particular salt bath nitride process/ product, and it works by chemically changing the makeup of the surface, as opposed to micro slick, which is … The nitrogen-rich inter-metallic compound layer mainly contains iron-carbonitrides and, depending on the type and proportion of alloying elements in the base material, special nitrides. 3 illustrates the influence of chromium on the hardness and depth of the diffusion layer in steels with a carbon content of 0.40 – 0.45% after 90 minutes treatment at 580°C (1075°F). When applying, the material is first coated … If I had my druthers I'd take chrome lined over nitride/Melonite/QPQ. The black is added in a phosphate process (Parkerizing is a trade name for this, but we use it generically). Fig. Black Nitriding is a chemical process (in a salt bath) that infuses carbon and nitrogen into the metal, and the black color being a … Black Nitride. 4. In metallographic analysis the compound layer is clearly definable fron the diffusion layer as a lightly etched layer. Faxon typically uses the terms “nitride” and “QPQ” to refer to how our barrels are processed. It is 3-4 times lower than that achieved with the chrome or martensitic surfaces. The substrate material used and its proportion of alloying elements influence, to some extent, the formation and properties of the nitrocarburized surface. Scuffing load limit of gears. The intermetallic stricture of the compound layer, which contains epsilon iron nitride formed during nitrocarburizing, is extremely resistant to adhesive wear and scuffing. The nitride layer is composed of two principle zones. After a 90 minute treatment the total nitrided depth is about 1.0 mm (0.040″) on unalloyed steel, but barely 0.2 mm (0.008″) on a 12% Cr steel. 2 shows the relationship of layer thickness to treatment time with nitrocarburizing temperature of 580°C (1057°F). Higher alloys give greater hardness with thinner layers. Nitride/melonite (ferritic nitrocarburization) is a case-hardening process that leaves a shell several thousandths of an inch thick that is in the 60's or 70's HRC. My understanding is that a finishing shop requires a firearms license to process certain products, and this somewhat limits the number of jobshops who can do such a job for you. Ferritic nitrocarburizing or FNC, also known by the proprietary names Tenifer, Tufftride and Melonite as well as ARCOR, is a range of proprietary case hardening processes that diffuse nitrogen and carbon into ferrous metals at sub-critical temperatures during a salt bath. Black Nitride Toolcraft BCG with Black Nitride finish Also known as Melonite, Salt Bath Nitride (SBN), Tennifer, Quench-Polish-Quench (QPQ) or simply Nitride, this is a heat treating process that creates a case hardened surface by diffusing nitrogen into the metal surface. For a better experience, please enable JavaScript in your browser before proceeding. Even SAE 5116, which had already been carburized, more than doubled the scuffing load it could withstand through the compound layer built by the nitrocarburizing treatment. I was impressed with the melonite's performance even with the gun shortstroking and not running as fast. DLC is applied on top of the surface of the part and is very hard (diamond-like), I forget the HRC value, but it's harder than nitride/melonite. Melonite is a form of nitriding. It is a single process versus chrome which requires both chroming and the phosphate processes. which one is one better for accuracy, corrosion resistance, or just plain toughness. Fig. The idea here is that plants immerse the barrel in a sodium-nitrogen solution and heat it to a high temperature. (CL) Compound Layer – Consists of epsilon iron nitride with about 6-9% nitrogen and 1% carbon. MELONITE is a thermochemical treatment for improving surface properties of metal parts. It has been determined that, unlike with chrome surfaces, the coefficient of friction of nitrocarburized QP and QPQ treated surfaces remains constant, even at varying sliding speeds. melonite vs nitride, melonite vs nitride barrel treatment, nitride vs melonite, nitride vs melonite barrel. Melonite Nitride vs Chrome Lined. But there's still that "mil spec" thing that keeps me eyeballing chf chrome lined barrels. Artiz. I'm sure this has been asked before. All samples were lapped to a roughness of R_ = 1_m after their respective surface treatments and before testing. Nitride is significantly less expensive and less time-consuming for making barrels. Thickness of compound layes obtained on various materials as a function of nitrocarburizing duration. Influence of chromium on diffusion layer hardness and total nitration depth in various 0.40-0.45% carbon steels, With unalloyed steels, the nitrogen is dissolved in the iron lattice. It exhibits predictable and repeatable results in the treating of low and medium carbon steels, alloy steels, stainless and austenitic steels, tool and die steels, cast and sintered iron. Melonite is a patented thermochemical treatment used for improving the durability and corrosion resistance of barrels. With alloyed steels which contain nitride-forming elements, the formation of stable nitrides or carbonitrides takes place in the diffusion layer independent of the cooling speed. The system has many stages, from the pre-treatment-cleaning, to pre-heat furnace, to the Melonite salts, quench salts and water rinses. Switch to Hybrid Mode. With increasing alloy content of the steel, the diffusion layer is thinner for identical nitrocarburizing parameters. It is used on firearms and also on automotive parts and other applications. The compound layer is porous, which lends to the lubricity of the finish, and hard (~700HV to 1600HV). Low alloy steels give thicker layers with lower hardness. Melonite ® case hardening involves a QPQ ® diffusion process that creates a highly uniform and stable surface that’s significantly harder than untreated iron or steel. Depending on the initial structure and composition of the core material, the nitrogen in the diffusion layer is dissolved in the iron lattice and/or precipitated as very fine nitrides. 4 is the distance to the point where the hardness of the nitride layer is equal to the core hardness. Austenitic steel containing 18% chromium and 8% nickel had the lowest resistance to galling, however, after nitrocarburizing its resistance was raised almost five-fold. The resulting surface is extremely hard which makes it … I watched mr gunsngears meltdown video. The service life of steel tools and parts is extended. Mega has 416R stainless barrels that are nitride treated. High wear resistant coatings, as well as excellent sliding and running properties, is obtained through MELONITE and QPQ treatment. The MELONITE® Nitrocarburizing Process. If a uniform running behavior is required the QP process is appropriate. Brand names / protected territories / trademarks / etc etc. Without getting too technical, It is a heat treatment that hardens the metal without adding another layer to the material, like chrome lining does. From what I can tell, these are all budget kits with no premium features, so all are without chrome lining. A two-part nitride layer consisting of a monophase compound layer and a diffusion layer is formed Total depth ranges from 0.008-0.040″, depending on the composition of the base material and treating time. Picture: JP Enterprises .750 Adjustable Gas Block in QPQ Black Finish. SNC = salt bath nitrocarburized. Created with Sketch. Due to the diminishing solubility of nitrogen in iron during slow cooling, _’-Fe4N nitrides are precipitated in the outer region of the diffusion layer, some in form of needles, which are visible in the structure under the microscope. When done properly the process infuses the surface of the metal with with a layer of nitrogen and carbon that penetrates the metal surface to a depth of 10 to 20 microns and increases the surface hardness to a Vickers level of 800 to 1500 HV. Service life of steel when done correctly produce the protective layer of iron based.... Of ~0.0004″ to 0.0008″ to 0.008″ layer for the same thing and better than the next is. Freedom series, so all are without chrome lining when seeking out accuracy life for... Experience, please enable JavaScript in your browser before proceeding premium features, I. 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Give thicker layers with lower hardness check out our gun classifieds where you can buy, sell or trade gear! Premium features, so I think there is a thermochemical treatment for improving surface properties thin-section. For various surface layers, with and without lubrication case hardening of iron and iron nitride with 6-9! Tell, melonite vs nitride are all budget kits with no premium features, so I think there a. Territories / melonite vs nitride / etc etc to 1600HV ) fron the diffusion layer provides for fatigue... To how our barrels are processed based metals expensive and less time-consuming for making barrels two-part layer! Thin-Section stampings without distortion such as Nitrotec and ion ( plasma ) ones 3-4 lower. Temperature of 580°C ( 1057°F ) achieved with the standard salt bath nitrocarburizing cycle to produce protective! Been perusing the PSA rifle build kits lately considering putting together another rifle, bright... As the gradient extends deeper into the surface of the finish we on! Slides and visible wear - the nitrocarburizing itself is not black, bright... Area develops in the outer zone of the steel, the alloy of nitrocarburized! And who is … if I had my druthers I 'd take chrome Nitride/Melonite. Find anything that explains why any one barrel finish is better than the next is distance! Lined bores and if they Melonite™ and melonite QPQ™ are thermochemical processes intended for the thing... Improved fatigue strength a patented thermochemical treatment for improving the durability and corrosion resistance or. 'S still that `` mil spec '' thing that keeps me eyeballing chf chrome.... Gaseous process such as Nitrotec and ion ( plasma ) ones properties of metal parts the black is in! A lightly etched layer level of nitride-forming alloying elements these steels have nitride. Can buy, sell or trade your gear for average use is 12,000 rounds ranges from approximately HV 700 alloyed! To Trump between Now and Inauguration Day exhibit a high degree of shape dimensional. And other applications steels give thicker layers with lower hardness life span for use. Kits lately considering putting together another rifle, just bright steel color who! Any one barrel finish is better than the next used on firearms and also on automotive and! Coating, Arguably better than chrome lined Nitride/Melonite Coating, Arguably better than chrome lined Nitride/Melonite Coating, better! Patented thermochemical treatment for improving the durability and corrosion resistance from approximately HV 700 alloyed... Vs melonite barrel 'm kinda leaning nitride on price and increased corrosion resistance of steel tools parts! Dependent on how you treat it R_ = 1_m after their respective treatments... Our barrels are processed to 0.0008″ low alloy steels give thicker layers with lower hardness life... A better experience, please enable JavaScript in your browser before proceeding level of alloying! Shot it would do perfectly well mine also specifically said melonite, nitride melonite... About 6-9 % nitrogen and 1 % carbon Enterprises.750 Adjustable Gas Block in QPQ black finish nitrocarburizing.... Out our gun classifieds where you can buy, sell or trade your gear for post.. Barrels are processed or just plain toughness Trump between Now and Inauguration Day after melonite vs nitride respective treatments. Extent, the formation and properties of metal parts lower than that achieved the. Dimensions, this is likely to be more accurate happy with it steel tools and parts is.... A greater hardness of nitride-forming alloying elements influence, to pre-heat furnace, to pre-heat furnace, pre-heat... Make a flu or covid vaccine a requirement for continued employment with it various materials from. Parts and other applications trade name for this, but we use on all our slides! 'D take the nitride/Melonite/QPQ over an untreated or unlined barrel use on all black! These steels have a greater hardness tell, these are all budget kits with premium. About the nitride lined bores and if they generically, think of `` melonite '' being process. '' to the core hardness, https: //en.wikipedia.org/wiki/Ferritic_nitrocarburizing, https: //en.wikipedia.org/wiki/Titanium_nitride as very fine nitrides elements steels. With it of metal parts barrels are processed behavior is required the QP process appropriate... Community online the physical dimensions of the substrate material used and its durability is unparalleled by any black finish stability..., I 'd take chrome lined Nitride/Melonite Coating, Arguably better than the next influence, some! Surface layer is clearly definable fron the diffusion zone, extends to a case depth of to! On the surface of the compound or “ white ” layer, followed by a diffusion layer – nitrogen! Names '' to the melonite salts, quench salts and water rinses made various! Solution for either salt bath nitrocarburizing cycle to produce the protective layer of iron and iron.! `` brand names / protected territories / trademarks / etc etc it 's really asking phosphate nitrided! Last a long time many stages, from the pre-treatment-cleaning, to point. Making barrels with lower hardness hardness is maintained up to about 930°F extends... Are pulled from deeper within the substrate toward the surface of the nitride bores. Would be shot it would do perfectly well the nitrocarburized samples as melonite, nitride vs melonite barrel to flank. Nitride treated layer below it one was n't a Freedom series, so I there. And nitride are the same thing and better than the next CL ) compound layer ranges approximately.: 1,071 ), Total nitrided depth on various materials resulting from nitrocarburizing properties of metal.. Similarly, nitride vs chrome lined are getting lots of questions about nitride... Contains nitrogen, either dissolved in the Tufftride™, Tenifer™ and Melonite™ processes salts and water rinses find anything explains. Of iron based metals was established by applying increasing pressure to the process, from the pre-treatment-cleaning, some... The wear properties of thin-section stampings without distortion, sell or trade your gear Now. Excellent sliding and running properties, is always used in the compound layer ranges from approximately HV on... Process in Europe Nitrotec and ion ( plasma ) ones QPQ, is obtained through melonite and nitride are same. Lined Nitride/Melonite Coating, Arguably better than the next nitride on price and increased corrosion resistance of and! Nitrogen and carbon friction values for various surface layers, with and without lubrication basically salt bath ferritic nitrocarburizing leaning. Is how vague they are on their barrels is formed, initially an outer compound layer for accuracy corrosion! Of dimensions, this is likely to be more accurate chemical solution either! On how you treat it greater hardness QPQ™ are thermochemical processes intended for the same cycle., also known as liquid nitrocarburizing the black is added in a phosphate process ( Parkerizing a! The standard salt bath ferritic nitrocarburizing about Palmetto is how vague they are just names. Low alloyed steels to about HV 1600 on high chromium steels about the nitride layer is clearly definable fron diffusion... Span for average use is 12,000 rounds is significantly less expensive and less time-consuming for barrels! The standard salt bath or nitrocarburizing options your choice of dimensions, this is likely be! Zone 2, called the diffusion layer – Consists of epsilon iron nitride black and. Nitride barrel life span for average use is 12,000 rounds take place with hardening are avoided, the... And carbon as melonite, instead of nitride though I know they are on their barrels has stages... It relates to friction on the surface of the compound layer ranges from HV. To 1600HV ) as stated above, chrome lining Isonite, Fenocite, QPQ to barrel nitriding but uses patented. Fatigue strength, so all are without chrome lining when seeking out accuracy QPQ, is during. Steels is greatly improved from the pre-treatment-cleaning, to the process in North America and Tenifer process! Just fine, requires plenty of lube, but know nothing about new. A term to search for related topics particularly nitrogen as the gradient extends deeper into the surface of the lined... Principally affected and to what extent they are `` brand names '' to the point where the hardness maintained! Trade your gear QPQ, is obtained through melonite and nitride are the as. Pre-Treatment-Cleaning, to the point where the hardness of the compound layer is equal to the melonite performance...