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对奥氏体不锈钢表面进行了爆炸强化、滚压强化和喷丸强化。爆炸强化时表面层内出现形变孪晶栅栏,位错线具有方向性、呈密布排列,局部山现ε马氏体、α马氏体和奥氏体超细晶粒的区域;滚压强化后表面层内也有就、孪晶栅栏出现,但位错以胞状结构的形式分布在奥氏体基体上;喷丸强化的表面层内孪晶栅栏十分致密,位错线仍以方向性排布,并无位错胞出现。表面层内组织结构出现差异,主要与变形速度和变形量有关,高速和较大的变形量可诱发α,ε马氏体转变和形成超细奥氏体晶粒,慢速变形时能促使位错胞的形成。本文还讨论了孪晶栅栏的形成方式及其内部构造。
The austenitic stainless steel surface was enhanced by blasting, rolling and shot peening. When the detonation is intensified, the deformable twinning fence appears in the surface layer. The dislocation lines have the directionality and are arranged in a dense arrangement. In the area, there are some areas of ε-martensite, α-martensite and austenite. After rolling strengthening The surface layer also has, twins fence appears, but dislocation in the form of cellular structure distribution in the austenite matrix; shot peening surface layer twin fence is very dense, the dislocation line is still arranged in the direction, No dislocation cells appear. The differences in the microstructure of the surface layer are mainly related to the deformation rate and deformation. High-speed and large deformation can induce α, ε martensite transformation and the formation of ultra-fine austenite grains. Slow deformation can promote the formation of Skeleton formation. This article also discusses the formation of twins fence and its internal structure.