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    • 4. 发明申请
    • TRIPLE-PHASE NANO-COMPOSITE STEELS
    • 三相纳米复合钢
    • WO2003052153A1
    • 2003-06-26
    • PCT/US2002/040126
    • 2002-12-12
    • MMFX TECHNOLOGIES CORPORATION
    • KUSINSKI, Grzegorz, J.POLLACK, DavidTHOMAS, Gareth
    • C22C38/00
    • C22C38/18C21D1/185C21D1/19C21D2201/00C21D2211/001C21D2211/005C21D2211/008C22C38/02C22C38/08
    • Carbon steels of high performance are disclosed that contain a three-phase microstructure consisting of grains of ferrite (11) fused with grains that contain dislocated lath structures in which laths of martensite (13) alternate with thin films of austenite (14). The structure includes the ferrite grains (11) fused with martensite-austenite grains (12), and each of the martensite-austenite grains (12) is of the dislocated lath structure, with substantially parallel laths (13) consisting of grains of martensite-phase crystals, the laths separated by thin films (14) of retained austenite phase. The microstructure can be formed by a unique method of austenization followed by multi-phase cooling in a manner that avoids bainite and pearlite formation and precipitation at phase interfaces. The desired microstructure can be obtained by casting, heat treatment, on-line rolling, forging, and other common metallurgical processing procedures, and yields superior combinations of mechanical and corrosion properties.
    • 公开了具有高性能的碳钢,其包含与包含位错板条结构的铁素体(11)晶粒组成的三相微结构,其中马氏体(13)的板条与奥氏体薄膜(14)交替。 该结构包括与马氏体 - 奥氏体晶粒(12)熔合的铁素体晶粒(11),并且每个马氏体 - 奥氏体晶粒(12)都是位错的板条结构,具有大致平行的由马氏体 - 相晶体,板条由残留奥氏体相的薄膜(14)分离。 微观结构可以通过奥氏体独特的方法形成,随后进行多相冷却,以避免贝氏体和珠光体在相界面的形成和析出。 期望的微观结构可以通过铸造,热处理,在线轧制,锻造和其它常规冶金加工工艺获得,并且产生机械和腐蚀性能的优良组合。