5Cr21Mn9Ni4N耐热钢等温时效组织研究  

Study on Microstructure Changes of 5Cr21Mn9Ni4N(21-4N) Heat-Resistance Steel during Aging

作　　者：于志伟[1] 许晓磊[1] 

机构地区：[1]大连海事大学金属材料工艺研究所,辽宁大连116026

出　　处：《材料热处理学报》2004年第2期5-7,共3页Transactions of Materials and Heat Treatment

摘　　要：利用XRD、SEM研究了两种不同原始组织状态的耐热钢 5Cr2 1Mn9Ni4N(2 1 4N)等温时效过程中组织结构的变化。结果表明 :等温时效过程中基体组织将发生分解 ,通过不连续沉淀机制形成M2 3C6 +γ层状组织 ,且M2 3C6 量随时效温度的提高而增加 ,其时效过程中微观组织变化与原始组织状态有关。讨论了原始组织状态对 2 1 4N钢组织稳定性及高温使用性能的影响。The microstructure changes of 21-4N heat-resistance steel with different original microstructures during aging at different temperature were studied by XRD and SEM. The results show that the matrix decomposes to form cellular structure (γ+M 23C 6) by discontinuous precipitation mechanism during aging. The amount of the M 23C 6 increases with increasing aging temperature. The aging characteristics are related to the original microstructure, which result in different properties for use at high temperature.

关 键 词：21-4N耐热钢 等温时效 层状组织 

分 类 号：TG115.2[金属学及工艺—物理冶金]