新型铁铬镍合金固溶处理后的组织和性能  

Microstructure and properties of a Fe-Cr-Ni alloy after solution treatment

作　　者：程晓农[1] 王植栋[1] 李冬升[1] 戴起勋[1] 邱宇[1] 高仕渊[1] 姜杨[1] 高佩[2] 刘瑜[2] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013 [2]江苏银环精密钢管股份有限公司,江苏宜兴214203

出　　处：《金属热处理》2013年第6期19-23,共5页Heat Treatment of Metals

基　　金：国家高技术研究发展计划(863)(2012AA03A501);江苏大学高级专业人才基金(12JDG066);江苏省级重点试验室开放课题(kjsmcx1004)

摘　　要：采用光学显微镜、X射线衍射仪和扫描电子显微镜,对新型Cr20Ni30NbAl合金固溶后的显微组织进行分析,测试了该合金的冲击、拉伸力学性能,观察了断口形貌。结果表明,Cr20Ni30NbAl合金基体组织为奥氏体,第二相为Cr的碳化物和Nb的碳化物。室温、高温下的抗拉强度及伸长率均满足相应标准的规定值,且室温冲击吸收能量也满足标准要求。室温、高温拉伸均为韧窝断口,但高温韧窝深度大于室温,高温下拉伸断口韧窝底部发现氮化铝。Solid solution microstructure of Cr20Ni30NbAl alloy was analyzed by metallographic microscope, XRD meter and scanning electron microscope, hnpacting and tensile properties tests, and fracture morphology was observed. The results show that the matrix structure of the alloy is austenite, and the secondary phase of the alloy is chromium and niobic carbides. Under room and high temperature conditions, the tensile strength and elongation meet the corresponding standards value, and the room temperature impact energy absorption also meets the requirements. The high temperature tensile fracture morphology is mainly dimples, and is deeper than that under room temperature, and aluminum nitride is found at the bottom of the dimples.

关 键 词：Cr20Ni30NbAl合金 固溶处理 组织 性能 

分 类 号：TG144[一般工业技术—材料科学与工程] TG146.1[金属学及工艺—金属材料]