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公开(公告)号：US20210355561A1
公开(公告)日：2021-11-18
申请号：US17443545
申请日：2021-07-27
摘要： The present invention provides a novel heat exchange medium to replace lead. A carbon-steel wire 1A heated in a heating furnace 11 is passed through a bath 12A filled with a liquid-phase Mg—Al—Ca alloy 20 obtained by melting a Mg—Al—Ca alloy in which the main constituent elements are Mg (magnesium), Al (aluminum) and Ca (calcium). When it passes through the bath 12A, the carbon-steel wire 1A, which has been heated for example to about 950° C. in the heating furnace 11, is cooled to about 550° C. The Mg—Al—Ca alloy is non-toxic and has no environmental impact as well.
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公开(公告)号：US5382005A
公开(公告)日：1995-01-17
申请号：US60263
申请日：1993-05-12
申请人： David S. Weiss
发明人： David S. Weiss
IPC分类号： B01J35/04 , B22F3/10 , B22F3/20 , B22F5/00 , B22F5/10 , F27B5/04 , F27D5/00 , F27D7/06 , C21D1/48
CPC分类号： F27B5/04 , B22F3/10 , F27D5/0062 , F27D5/0068 , F27D7/06
摘要： Methods and apparatus for protecting extruded metal powder green bodies (34) during firing are provided. In certain embodiments, one or more green bodies (34) are housed in a non-gas tight chamber (13) located in the hot zone (24) of a cold-wall vacuum/atmosphere furnace (10). Furnace gas, e.g., hydrogen, is supplied to the interior of the chamber (13). The resulting one-way flow out of the chamber (13) protects the green bodies (34) from the backflow of burn-out products, as well as from contaminants arising from the walls and internal components of the furnace (10). In other embodiments, green bodies (34) are housed in individual non-gas tight containers (36). The containers (36) minimize the amount of furnace gas which comes into contact with the green bodies (34) during sintering and thus minimize the level of exposure of the green bodies (34) to oxidative impurities in the furnace gas. When composed of the same material as the green bodies, the containers (36) also perform a getter function.
摘要翻译： 提供了用于在烧制期间保护挤出的金属粉末生坯体（34）的方法和装置。 在某些实施例中，一个或多个生坯体（34）容纳在位于冷壁真空/气氛炉（10）的热区（24）中的非气密室（13）中。 炉气体，例如氢气，被供应到腔室（13）的内部。 从腔室（13）流出的所得单向流动保护生坯体（34）免受燃烧产物的回流，以及来自炉壁（10）的壁和内部部件的污染物。 在其他实施例中，生坯体（34）容纳在单独的非气密容器（36）中。 容器（36）最小化在烧结期间与生坯体（34）接触的炉内气体的量，从而将生坯体（34）暴露于炉气中的氧化杂质的程度最小化。 当由与生坯相同的材料组成时，容器（36）也执行吸气功能。
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3.发明授权Non-cyanide salt bath and process for carburization of ferrous metals and alloys 失效非氰化物盐浴和黑色金属和合金渗碳工艺
公开(公告)号：US4591397A
公开(公告)日：1986-05-27
申请号：US705852
申请日：1985-02-26
CPC分类号： C23C8/46
摘要： A non-cyanide molten salt bath composition and process for the carburization of objects made of ferrous metals or alloys are provided. The composition comprises a molten salt mixture, at a temperature in the range of 900.degree. C. to 1050.degree. C., of an alkali metal chloride or a mixture of alkali metal chlorides; an activator consisting of an oxygen containing strontium or barium salt; and a graphite cover. The process comprises immersing the ferrous metal or alloy part in the molten mixture at a temperature in the range of 900.degree. C. to 1050.degree. C.
摘要翻译： 提供非氰化物熔融盐浴组合物和用于对由黑色金属或合金制成的物体渗碳的方法。 该组合物包含熔融盐混合物，其温度范围为900〜1050℃，碱金属氯化物或碱金属氯化物的混合物; 由含氧锶或钡盐组成的活化剂; 和石墨盖。 该方法包括将黑色金属或合金部分浸入熔融混合物中，温度范围为900至1050℃。
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公开(公告)号：US4549911A
公开(公告)日：1985-10-29
申请号：US576589
申请日：1984-02-02
CPC分类号： C21D1/76 , Y02P10/122
摘要： Rod and wire or other ferrous material is annealed, normalized, spherodized, etc. in a furnace under nitrogen based atmospheres to which is added a mixture of methylacetylene and propadiene. This latter mixture reacts with decarburizing substances such as carbon dioxide in the furnace at relatively low temperatures of about 1000.degree.-1100.degree. F. to substantially preclude decarburization of the ferrous material. The use of a mixture of methylacetylene and propadiene in the amount of approximately 0.1-10% by volume of the furnace atmosphere also results in a relatively high CO level, reduces decarburization and oxidation of the ferrous material.
摘要翻译： 棒和线或其他铁质材料在氮气氛下在炉中进行退火，归一化，球化等，加入甲基乙炔和丙二烯的混合物。 后一种混合物在约1000-111°F的相对较低的温度下与炉中的脱碳物质如二氧化碳反应，从而基本上排除了含铁物质的脱碳。 甲醇和丙二烯的混合物的使用量约为炉气氛约0.1-10％（体积），还会导致较高的CO含量，减少含铁材料的脱碳和氧化。
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公开(公告)号：US4492604A
公开(公告)日：1985-01-08
申请号：US435401
申请日：1982-10-20
申请人： Johannes Muller , Helmut Kunst , Christian Scondo
发明人： Johannes Muller , Helmut Kunst , Christian Scondo
CPC分类号： C23C8/50
摘要： Low cyanide nitriding salt baths which are composed of alkali cyanate and alkali carbonate and used for treating components made of steel and iron produce coatings on the surface of the component in some cases and can lead to problems in the use of the components. A satisfactory surface quality can be obtained from nitriding salt baths which additionally contain 0.5 to 100 ppm of selenium.
摘要翻译： 由碱金属氰酸盐和碱金属碳酸盐组成的用于处理由钢铁制成的组分的低氰化氮化盐浴在一些情况下在组分的表面上产生涂层并且可能导致使用组分的问题。 从含有0.5〜100ppm硒的氮化盐浴可获得令人满意的表面质量。
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6.发明授权
公开(公告)号：US4461656A
公开(公告)日：1984-07-24
申请号：US475490
申请日：1983-03-15
申请人： John A. Ross
发明人： John A. Ross
摘要： The surface of a ferrous metal workpiece is heat treated by immersing the workpiece to be treated in the fluidized particulate bed of a fluidized bed furnace. The bed is fluidized by a gas atmosphere comprising ammonia gas, hydrocarbon gas, and optionally a non-reactive gas. The temperature of the fluidized bed is maintained at about 600.degree. F. to 1250.degree. F. The proportion of the ammonia gas in the gaseous atmosphere may be varied to alter the surface characteristics of the treated workpiece. The compound layer and the underlying diffusion zone exhibit increased thicknesses. Increased hardness and increased impact loading resistance of the treated surface are obtainable.
摘要翻译： 通过将待处理的工件浸入流化床炉的流化颗粒床中来对黑色金属工件的表面进行热处理。 该床由包含氨气，烃气体和任选的非反应性气体的气体气氛流化。 流化床的温度保持在约600°F至1250°F。气态气氛中氨气的比例可以改变，以改变被处理工件的表面特性。 化合物层和下面的扩散区表现出增加的厚度。 可以获得经处理的表面的增加的硬度和增加的抗冲击负载能力。
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公开(公告)号：US4445945A
公开(公告)日：1984-05-01
申请号：US481727
申请日：1983-04-04
申请人： Donald J. Schwalm
发明人： Donald J. Schwalm
摘要： Disclosed is a method of controlling the atmosphere of a heat-treating furnace whose atmosphere consists essentially of a carrier gas of CO, H.sub.2 and N.sub.2 produced from a mixture of methanol and nitrogen. In accordance with the present invention, the ratio of flow of methanol to flow of nitrogen is varied to maintain the CO content of the furnace atmosphere at a predetermined value. This renders more effective the control by conventional means of the flow of additive gases to maintain the carbon potential of the furnace atmosphere at a predetermined value. The flows of methanol and nitrogen may be controlled based on monitored CO content only, or their control may be interrelated to monitored carbon potential as well.
摘要翻译： 公开了一种控制热处理炉的气氛的方法，其气氛基本上由由甲醇和氮气的混合物产生的CO，H 2和N 2的载气组成。 根据本发明，改变甲醇流量与氮气流量的比例，使炉内气氛的CO含量保持在预定值。 这使得通过常规方法进行添加气体流动的控制更有效，以将炉气氛的碳势保持在预定值。 甲醇和氮气的流动可以仅基于监测的CO含量来控制，或者它们的控制也可以与监测的碳势相关。
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公开(公告)号：US4398971A
公开(公告)日：1983-08-16
申请号：US337087
申请日：1981-12-31
申请人： Rune Peterson
发明人： Rune Peterson
CPC分类号： C21D1/763
摘要： In an indirectly heated, gas-fired furnace (10) for the heat treatment of metal material in an atmosphere of processing gas consisting predominantly of nitrogen, the processing gas is produced using the heating exhaust gases as the principal raw material. The exhaust gases are cooled, filtered and freed of carbon monoxide and water vapor, whereupon a small amount of air is added to impart a predetermined value to the oxygen content and a controlled amount of liquefied petroleum gas or other hydrocarbon gas is added. A processing gas consisting predominantly of nitrogen, hydrogen and carbon monoxide is produced by thermal cracking of the liquefied petroleum gas in a catalytic reactor (25) and fed to the furnace (10). If a processing gas free of carbon and consisting predominantly of nitrogen and hydrogen is required, the reactor (25) may be replaced by a deoxo reactor into which the exhaust gases, after their oxygen content has been adjusted, are fed together with a controlled amount of hydrogen gas.
摘要翻译： PCT No.PCT / SE81 / 00134 Sec。 371日期1981年12月31日 102（e）日期1981年12月31日PCT提交日期为1981年5月5日PCT公布。 出版物WO81 / 03184 日本1981年11月12日。在主要由氮气组成的处理气体的气氛中对金属材料进行热处理的间接加热的燃气炉（10）中，使用加热废气作为主要产生处理气体 原材料。 废气被冷却，过滤并释放一氧化碳和水蒸汽，由此加入少量空气以赋予氧含量预定值，并且加入受控量的液化石油气或其它烃气体。 主要由氮气，氢气和一氧化碳组成的处理气体是通过催化反应器（25）中的液化石油气的热裂解产生的，并被送入炉子（10）。 如果需要不含碳并且主要由氮和氢组成的处理气体，则反应器（25）可以被脱氧反应器代替，其中将氧气含量调节后的排气与受控量一起进料到其中 的氢气。
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9.发明授权Method of heat treating ferrous metal articles under controlled furnace atmospheres 失效在受控炉气氛下处理黑色金属制品的方法
公开(公告)号：US4386972A
公开(公告)日：1983-06-07
申请号：US243230
申请日：1981-03-13
申请人： David G. Knight
发明人： David G. Knight
摘要： Method of generating furnace atmospheres and processes for using the atmospheres for carburizing, decarburizing, neutral hardening, annealing or carbonitriding ferrous base metals.The invention is characterized by forming atmospheres that are a mixture of an oxygen-bearing medium comprising oxygen or a gaseous compound containing oxygen in combination with hydrogen and carbon, a gaseous source of hydrocarbon and an inert gas carrier forming the major component of the mixture. Gaseous ammonia can be substituted for a portion of the inert gas carrier to provide an atmosphere suitable for carbonitriding ferrous base metals.The normally gaseous mixture is prepared outside of the furnace and then injected into the furnace where reaction of the mixture produces the desired furnace atmosphere.
摘要翻译： 生成炉气的方法以及使用气氛进行渗碳，脱碳，中和硬化，退火或碳氮共渗的铁基金属的方法。 本发明的特征在于形成气氛，其是包含氧气或含氧气体的化合物与氢和碳组合的含氧介质，气态烃源和形成混合物主要成分的惰性气体载体的混合物。 气态氨可以代替惰性气体载体的一部分，以提供适于碳氮共渗铁基金属的气氛。 常规气态混合物在炉外制备，然后注入炉中，其中混合物的反应产生所需的炉气氛。
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10.发明授权Method for producing dual-phase and zinc-aluminum coated steels from plain low carbon steels 失效从普通低碳钢生产双相和锌铝涂层钢的方法
公开(公告)号：US4361448A
公开(公告)日：1982-11-30
申请号：US267659
申请日：1981-05-27
申请人： Pertti J. Sippola
发明人： Pertti J. Sippola
摘要： The invention relates to a method for producing coated high strength low alloy steel. A strip of steel is cleaned from rolling oil, is heated to the temperature range A.sub.1 to A.sub.3 in a protective atmosphere, is soaked and subsequently quenched in a zinc-aluminum bath for a short time sufficient to adhere a zinc coating to the steel surface, whereafter the steel strip is rapidly cooled to a temperature below 300.degree. C., to obtain a dual-phase steel structure.
摘要翻译： 本发明涉及一种生产涂层高强度低合金钢的方法。 将钢带从轧制油中清洗，在保护气氛中加热到A1至A3的温度范围，浸泡并随后在锌 - 铝浴中淬火短时间足以将锌涂层粘附到钢表面， 然后将钢带快速冷却至低于300℃的温度，以获得双相钢结构。
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