超级双相不锈钢中σ相力学性能的纳米压痕表征  

Nanoindentation Characterization of Mechanical Properties of σ Phase in Super Duplex Stainless Steel

作　　者：姚瑶[1,2] 周灿栋[2] 史弼[2] 杨晓萍[2] 单爱党[1] 宋洪伟[2] 

机构地区：[1]上海交通大学材料科学与工程学院,上海200240 [2]宝钢股份有限公司研究院,上海201900

出　　处：《机械工程材料》2011年第7期1-3,7,共4页Materials For Mechanical Engineering

摘　　要：为了预测金属间化合物σ相的析出对00Cr25Ni7Mo4N超级双相不锈钢力学性能的影响,采用纳米压痕技术对加热缓冷后该钢的σ相进行了表征,并对其显微组织进行了观察。结果表明:钢中σ相的体积分数为36.7%,其纳米压痕硬度范围为14.0～17.1GPa,平均值为15.7GPa,弹性模量范围为262～380GPa,平均值为317GPa;测试结果基本排除了基体效应的影响。To predict the effect of a phase precipitation on mechanical properties of 00Cr25Ni7Mo4N super duplex stainless steel, the intermetallics a phase was characterized by nanoindentation after slow cooling, and the microstructure was observed. The results show that the volume fraction of δ phase in the steel was 36. 7%, and the nanoindentation hardness of the δ phase was in the range of 14. 0-17. 1 GPa with a mean value of 15.7 GPa; the modulus of elasticity was in the range of 262-380 GPa with a mean value of 317 GPa. In addition, the substrateeffect on results could be removed.

关 键 词：双相不锈钢 Δ相 力学性能 纳米压痕 

分 类 号：TG142.1[一般工业技术—材料科学与工程]