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马氏体是密排六方晶体结构。在层错能较低的奥氏体中易产生马氏体。相变也是重要的相变类型之一。对于目前国内外研究开发的超低温奥氏体钢来说,相变及马氏体的组织、性能等问题的研究是很重要的。但到目前为止,对于相变行为及机理仍不很清楚。显然弄清这些问题对超低温奥氏体钢的设计和应用是具有一定的价值和意义的。 作者在奥氏体钢的研究开发过程中,对形变组织特征进行了初步探讨。材料的主要成分范围;0.05％C,0～0.45％N,24％～32％Mn,7％～13％Cr。材料经真空熔炼、锻造后进行热处理,然后加工成拉伸试样和冲击试样。利用光学显微镜、电子探针扫瞄仪观察
Martensite is a hexagonal close-packed crystal structure. In the fault can lower the austenite can easily produce martensite. Phase change is also one of the important types of phase transitions. For the research and development of ultra-low temperature austenitic steel at home and abroad, the phase transition and martensite organization, performance and other issues of study is very important. So far, however, the behavior and mechanism of phase transition remains unclear. Clearly understand these issues on the design and application of ultra-low temperature austenitic steel is of some value and significance. In the process of research and development of austenitic steel, the author made a preliminary study on the characteristics of the deformed structure. The main components of the material range; 0.05% C, 0 ~ 0.45% N, 24% ~ 32% Mn, 7% ~ 13% Cr. Material vacuum melting, forging after heat treatment, and then processed into tensile specimens and impact specimens. Using optical microscopy, electron probe scanning observation