公开(公告)号：US4713122A

公开(公告)日：1987-12-15

申请号：US840778

申请日：1986-03-18

Applicant: Cyril Dawes ,  Colin G. Smith

Inventor： Cyril Dawes ,  Colin G. Smith

IPC: C21D9/00 ,  C21D9/46 ,  C23C8/26 ,  C23C8/80 ,  C21D1/74

CPC classification number: C23C8/26 ,  C21D9/0025 ,  C21D9/46 ,  C23C8/80

Abstract: Thin metal articles of pre-determined shape are given a first treatment to provide a hardened surface and a second treatment to correct distortion caused by the hardening treatment. The hardening is provided an epsilon nitride layer and the corrective treatment is a heat treatment at 150.degree. to 600.degree. C., which will correct the distortion without reducing the hardness of the epsilon nitride layer.

Abstract translation: 给予预定形状的薄金属制品进行第一处理以提供硬化表面和第二处理以校正由硬化处理引起的变形。 提供硬化的氮化钛层，并且校正处理是在150℃至600℃的热处理，这将在不降低ε氮化物层的硬度的情况下校正变形。

公开(公告)号：US4596611A

公开(公告)日：1986-06-24

申请号：US668032

申请日：1984-11-05

Applicant: Cyril Dawes ,  John D. Smith

Inventor： Cyril Dawes ,  John D. Smith

IPC: C21D1/72 ,  C21D9/00 ,  C23C8/26 ,  C23C8/32 ,  C23C8/34 ,  C23C8/80 ,  C23C11/16

CPC classification number: C23C8/26 ,  C21D9/0068 ,  C23C8/34 ,  C23C8/80

Abstract: A non-alloy steel component is nitrocarburized at 550.degree. to 720.degree. C. for up to 4 hours in a nitriding gaseous atmosphere e.g. ammonia or ammonia and endothermic or exothermic gas, and is thus exposed to air or other oxidizing atmosphere for 2 to 120 seconds to form an oxide-rich layer thereon before being quenched into an oil/water emulsion, degreased and a tack-free wax coating applied. Alternatively, the component may be cooled in air or other oxidizing atmosphere and then wax coated or it may be cooled in a non-oxidizing atmosphere and then reheated to provide the oxide-rich surface layer before being cooled again and wax coated. As a further alternative, the component may be cooled, lapped to a surface roughness of not more than 0.2 micrometers Ra, reheated to oxidize and then quenched. These techniques give a good corrosion resistance to the component.

公开(公告)号：US4563223A

公开(公告)日：1986-01-07

申请号：US596930

申请日：1984-04-05

Applicant: Cyril Dawes ,  John D. Smith ,  Colin G. Smith

Inventor： Cyril Dawes ,  John D. Smith ,  Colin G. Smith

IPC: C23C8/10 ,  C23C8/02 ,  C23C8/14 ,  C23C8/22 ,  C23C8/26 ,  C23C8/32 ,  C23C8/34 ,  C23C8/80 ,  C23C22/62 ,  B05D1/02

CPC classification number: C23C22/62 ,  C23C8/02 ,  C23C8/22 ,  C23C8/26 ,  C23C8/32 ,  C23C8/34 ,  C23C8/80

Abstract: To impart good salt spray corrosion resistance to alloy steel components, such components are gas nitrocarburized at 550.degree. C. to 800.degree. C. to produce an epsilon layer, oxidized to produce an Fe.sub.3 O.sub.4 layer not more than 1 micrometer thick, quenched into an oil/water emulsion, degreased and then wax coated. The steel components may be surface finished after nitrocarburizing.A carburizing, carbonitriding or neutral atmosphere heat treatment may be effected prior to nitrocarburizing heat treatment with both heat treatments being effected at above the pearlite to austenite transformation temperature.

Abstract translation: 为了对合金钢部件赋予良好的耐盐雾腐蚀性，这些组分在550℃至800℃下进行气体氮碳共渗以产生ε层，氧化生成不超过1微米厚的Fe 3 O 4层，淬火成油 /水乳液，脱脂，然后涂蜡。 钢组分可以在氮碳共渗后进行表面处理。 渗碳，碳氮共渗或中性气氛热处理可以在氮碳共渗热处理之前进行，两种热处理都在珠光体以上进行到奥氏体相变温度。

公开(公告)号：US4496401A

公开(公告)日：1985-01-29

申请号：US433380

申请日：1982-10-08

Applicant: Cyril Dawes ,  John D. Smith

Inventor： Cyril Dawes ,  John D. Smith

IPC: C21D1/72 ,  C21D9/00 ,  C23C8/26 ,  C23C8/32 ,  C23C8/34 ,  C23C8/80 ,  C23C11/14

CPC classification number: C23C8/26 ,  C21D9/0068 ,  C23C8/34 ,  C23C8/80

Abstract: A non-alloy steel component is nitrocarburized at 550.degree. to 720.degree. C. for up to 4 hours in a nitriding gaseous atmosphere eg. ammonia or ammonia and endothermic or exothermic gas, and is thus exposed to air or other oxidizing atmosphere for 2 to 120 seconds to form an oxide-rich layer thereon before being quenched into an oil/water emulsion, degreased and a tack-free wax coating applied. Alternatively, the component may be cooled in air or other oxidizing atmosphere and then wax coated or it may be cooled in a non-oxidizing atmosphere and then reheated to provide the oxide-rich surface layer before being cooled again and wax coated. As a further alternative, the component may be cooled, lapped to a surface roughness of not more than 0.2 micrometers Ra, reheated to oxidize and then quenched. These techniques give a good corrosion resistance to the component.

Abstract translation: 非合金钢组分在氮化气氛中在550至720℃下氮碳共渗达4小时。 氨或氨和吸热或放热气体，然后暴露于空气或其他氧化气氛2至120秒，以在其中淬火成油/水乳液，脱脂和无粘性蜡涂层之前在其上形成氧化物富集层 应用。 或者，组分可以在空气或其它氧化气氛中冷却，然后蜡涂覆，或者可以在非氧化性气氛中冷却，然后再次加热，再提供富氧表面层，然后再次冷却并涂蜡。 作为另外的替代方案，可以将组分冷却，研磨成不大于0.2微米的Ra的表面粗糙度，再加热氧化然后骤冷。 这些技术对组分提供良好的耐腐蚀性。

公开(公告)号：US4904316A

公开(公告)日：1990-02-27

申请号：US262310

申请日：1988-10-25

Applicant: Cyril Dawes ,  Donald F. Tranter

Inventor： Cyril Dawes ,  Donald F. Tranter

IPC: C23C8/02 ,  C23C8/26 ,  C23C8/32

CPC classification number: C23C8/32 ,  C23C8/02 ,  C23C8/26

Abstract: An epsilon iron nitride surface layer of high surface wear resistance is formed on a steel component by gas nitriding or nitrocarburizing and, according to the invention, includes the preliminary step of heating the component to the nitriding temperature in an atmosphere which is inert to the metal of the component.

公开(公告)号：US4710238A

公开(公告)日：1987-12-01

申请号：US825890

申请日：1986-02-04

Applicant: Cyril Dawes ,  Donald F. Tranter

Inventor： Cyril Dawes ,  Donald F. Tranter

IPC: C23C8/26 ,  C23C8/34 ,  C21D1/74

CPC classification number: C23C8/34 ,  C23C8/26

Abstract: A component formed of interstitial free steel is heated in a gaseous atmosphere containing 15% by volume of a nitrogen doner, e.g. ammonia, at about 500.degree. C. to about 740.degree. C. for about 30 minutes to about 4 hours to form an epsilon iron nitride surface layer, and a layer of nitrides of trace alloying elements below the surface layer.

Abstract translation: 由无间隙钢形成的部件在含有15体积％的氮气供给器的气态气氛中加热。 氨，在约500℃至约740℃下进行约30分钟至约4小时以形成ε-氮化铁表面层，以及在表面层下方的微量合金元素的氮化物层。

公开(公告)号：US4793871A

公开(公告)日：1988-12-27

申请号：US37192

申请日：1987-04-10

Applicant: Cyril Dawes ,  Donald F. Tranter

Inventor： Cyril Dawes ,  Donald F. Tranter

IPC: C23C8/02 ,  C23C8/26 ,  C23C8/32 ,  C21D1/74

CPC classification number: C23C8/32 ,  C23C8/02 ,  C23C8/26

Abstract: A method is disclosed for subjecting a steel component made of a non-alloy or fine grained steel to a hardening treatment. An epsilon iron nitride surface layer of high surface area resistance is formed on the steel component by gas nitriding or nitrocarburizing and includes the preliminary step of heating the component to the nitriding temperature in an atmosphere which is inert to the metal of the component.