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本文利用光学金相、X射线衍射及透射电镜研究,发现高锰无磁钢具有两种不同形态的板条组织和ε马氏体的扭折形态。固溶淬火形成的断续状短板条及形变诱发形成的细长板条都是由ε马氏体和fcc孪晶所组成,讨论了形成机理。晶体学分析表明,fcc孪晶界两侧的ε马氏体成扭析形态,是因为孪晶界两侧的基体位向不同所致,扭折部分为hcp孪晶。
In this paper, the use of optical metallography, X-ray diffraction and transmission electron microscopy studies found that high manganese non-magnetic steel with two different forms of lath and ε martensite kink morphology. The discontinuous short slab formed by solid solution quenching and the elongated slab induced by deformation are composed of ε-martensite and fcc twins, and the formation mechanism is discussed. Crystallographic analysis shows that the ε-martensite on both sides of the fcc twins is in a twisted form due to the different orientation of the matrix on both sides of the twin boundaries, and kink twins are the kinks.