【摘要】 针对Cr27高铬铸铁的质量问题,确定了合金的成分范围、熔炼工艺、铸造工艺及热处理工艺。结果表明,Cr27高铬铸铁的铸态组织为(Cr,Fe)7C3、奥氏体和出现在碳化物周围贫碳合金元素区的少量马氏体和珠光体。合金经过V、Ti、B变质处理后,碳化物变得细小、均匀,V、Ti、B、RE复合变质效果更佳。更多还原

【Abstract】 In this paper, aiming at the quality question of high chromium cast iron of percent 27%, the composition, melting technology, foundry technique and the heat treatment of high chromium cast iron were confirmed. The result shows that the cast structure of the high chromium cast iron of percent 27% is (Cr,Fe)7C3,austenite and a little martensite and pearlite distributing around the carbon-poor alloying agent zone. The carbide turns fine and even through modification by adding V, Ti and B elements respectively, and the result of compound modification by adding V, Ti, B, RE is optimal.更多还原