【摘要】 通过观察高锰钢高温淬火和 Si- Ca变质组织 ,指出高锰钢中的碳化物在高温淬火和变质处理过程中均能形成 ,并在一定条件下以团球状弥散分布于奥氏体晶粒内。此外 ,利用高温金相观察了高锰钢组织在加热或高温保温过程中的变化。发现碳化物溶入奥氏体的过程伴随着晶粒的长大。晶粒长大的方式是晶界迁移和大晶粒吞并小晶粒。表面组织层磨发现 ,表层碳化物溶解后 ,将留下小的孔洞。上述结果对开发不经热处理高锰钢及高锰钢热处理工艺的确定具有重要的参考价值更多还原

【Abstract】 The carbides in high manganese steel can be formed during quenching at elevated temperatures and by modification treatment The carbides look like nodular and distribute in the austenite (γ) grains under some conditions Observed by high temperature morphology, it ia found that the carbides in as cast can be solved into γ at elevated temperature Meanwhile the γ crystal grows fast and its growth routes are the boundary migration and the means of the larger grains annexing the small ones When polished layer by layer, we found that the cavities are left at the surface after the carbides solved into the γ These results are of great valuable for developing the high manganese steel without heat treatment and determining the heat treatment process of high manganese steel更多还原