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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
big 7 or big 30
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<blockquote data-quote="Outlaw6.0" data-source="post: 782663" data-attributes="member: 23486"><p>He has talked about that before, somewhere. His personal 7am had a good bit more rounds through it that I thought he'd get. A lot of it depends on how you treat it.</p><p> </p><p></p><p> </p><p></p><p> </p><p> </p><p>SBN & Meloniting (from what I understand) are pretty much the same thing. The process is Nitrocarburizing to bore surface to increase hardness & lubricity (make it slippery).</p><p> </p><p><strong>Salt Bath Nitriding</strong></p><p></p><p>Melonite QPQ Process The Melonite QPQ process is a multi step process that provides a very uniform consistent nitride layer on your components. The first step of the process is a preheat to raise the components surface temperature to about 700 - 800°F in air. The product is then transferred to the MEL 1/TF1 tank containing the liquid Melonite salt to begin the Nitrocarburizing process. The salt melt mainly consists of alkali cyanate and alkali carbonate. It is operated in a pot made from special material, and the pot is fitted with an aeration device. The active constituent in the MEL 1 / TF 1 bath is the alkali cyanate. The Nitrocarburizing process step is conducted in the MEL 1 / TF 1 bath at 896-1166°F, the standard temperature is usually 1076°F. When ferrous alloys are immersed into the bath it creates a reaction with the salt and begins to diffuse nitrogen and a small amount of carbon into the substrate. Because the Melonite process is a liquid nitriding processs, the nitride layer is extremely uniform on inside surfaces as well as outside surfaces. The product is allowed to soak in the MEL 1/TF 1 bath for a predetermined period to achieve the desired cased depth and compound layer thickness. Unlike gas nitriding or gas nitro-carburizing, the substances – MEL 1 / TF 1 and REG 1 - needed for the MELONITE®- and QPQ®-process, do not contain constituents classified as toxic or harmful to the environment. A specially developed cooling bath (AB 1 bath) is used for carrying out the oxidative treatment after salt bath nitrocarburizing. During this treatment, a black iron oxide layer (magnetite) is produced on the surface of the treated parts, which greatly enhances the corrosion resistance. The temperature of the cooling bath is 700 - 800°F. Apart from the oxidative effect, the bath has a positive influence on the dimensional stability of the cooled components. </p><p></p><p> </p><p> </p><p>t</p></blockquote><p></p>
[QUOTE="Outlaw6.0, post: 782663, member: 23486"] He has talked about that before, somewhere. His personal 7am had a good bit more rounds through it that I thought he'd get. A lot of it depends on how you treat it. SBN & Meloniting (from what I understand) are pretty much the same thing. The process is Nitrocarburizing to bore surface to increase hardness & lubricity (make it slippery). [B]Salt Bath Nitriding[/B] Melonite QPQ Process The Melonite QPQ process is a multi step process that provides a very uniform consistent nitride layer on your components. The first step of the process is a preheat to raise the components surface temperature to about 700 - 800°F in air. The product is then transferred to the MEL 1/TF1 tank containing the liquid Melonite salt to begin the Nitrocarburizing process. The salt melt mainly consists of alkali cyanate and alkali carbonate. It is operated in a pot made from special material, and the pot is fitted with an aeration device. The active constituent in the MEL 1 / TF 1 bath is the alkali cyanate. The Nitrocarburizing process step is conducted in the MEL 1 / TF 1 bath at 896-1166°F, the standard temperature is usually 1076°F. When ferrous alloys are immersed into the bath it creates a reaction with the salt and begins to diffuse nitrogen and a small amount of carbon into the substrate. Because the Melonite process is a liquid nitriding processs, the nitride layer is extremely uniform on inside surfaces as well as outside surfaces. The product is allowed to soak in the MEL 1/TF 1 bath for a predetermined period to achieve the desired cased depth and compound layer thickness. Unlike gas nitriding or gas nitro-carburizing, the substances – MEL 1 / TF 1 and REG 1 - needed for the MELONITE®- and QPQ®-process, do not contain constituents classified as toxic or harmful to the environment. A specially developed cooling bath (AB 1 bath) is used for carrying out the oxidative treatment after salt bath nitrocarburizing. During this treatment, a black iron oxide layer (magnetite) is produced on the surface of the treated parts, which greatly enhances the corrosion resistance. The temperature of the cooling bath is 700 - 800°F. Apart from the oxidative effect, the bath has a positive influence on the dimensional stability of the cooled components. t [/QUOTE]
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