稀土奥氏体热作模具钢的组织和强韧性研究  

RESEARCH ON MICROSTRUCTURE AND STRENGTHTOUGHNESS OF Re-AUSTENITIC HOT WORKING DIE STEEL

作　　者：王良平[1] 吴晓春[1] 闵娜[1] 江浩[1] 王庆亮[2] 

机构地区：[1]上海大学材料科学与工程学院,上海200072 [2]宝山钢铁股份有限公司特殊钢分公司

出　　处：《上海金属》2009年第1期15-18,共4页Shanghai Metals

基　　金：国家科技支撑计划课题(2007BAE51B04);上海市科技登山项目(065211028)

摘　　要：测试了加稀土元素的奥氏体热作模具钢的组织、强韧性及热稳定性，并利用SEM对冲击断口进行分析。结果表明：该钢具有良好的强韧性和高热稳定性，稀土的加入改善了钢的组织性能，室温冲击韧性超过300J／cm^2，在750℃保温20h的试验条件下，硬度降低1～3HRC，表明试验钢可以运用在高温工作条件下。Rare earth elements were added into austenitic hot working die steel, the microstructure, strength-toughness and thermo stability of this steel were tested, and the impact fracture was analyzed by SEM. The results showed that the steel was of a good property of strength-toughness and high thermo stability. Rare earth elements improved the microstructure of the steel, the room temperature impact toughness exceeding 300 J/cm^2, and the hardness reducing only 1 - 3HRC at 750% for 20 hours, so the test steel could be used in high temperature applications.

关 键 词：稀土元素 奥氏体热作模具钢 强韧性 热稳定性 

分 类 号：TG142.45[一般工业技术—材料科学与工程] O614.33[金属学及工艺—金属材料]