高温对9Cr-1Mo-V-Nb-N钢力学性能的影响  

Effects of High Temperature on Mechanical Properties of 9Cr-1Mo-V-Nb-N Steel

作　　者：王正品[1] 刘江南[2] 要玉宏[1] 束国刚[3] 刘树涛 郭元蓉 顾海澄[1] 石崇哲[2] 

机构地区：[1]西安交通大学材料强度国家重点实验室,陕西西安7100492 [2]西安工业学院材料与化工学院,陕西西安710032 [3]苏州热工研究院,江苏苏州215004 [4]电力公司热工研究院,陕西西安710032 [5]成都无缝钢管有限责任公司,四川成都610069

出　　处：《金属热处理》2005年第3期23-26,共4页Heat Treatment of Metals

基　　金：陕西省自然科学基金(2001C55)

摘　　要：研究了马氏体型热强钢- 9Cr- 1Mo- V- Nb- N在 566℃时静力强塑性和动力强韧性的变化特征。与室温性能相比,静力和动力强度降低,弹性模量降低,均匀塑性变形能力减弱,局集塑性变形能力增大。动力冲击时,由于强度的降低,裂纹形成功减小,局集塑性变形使挠度增大,裂纹扩展功基本保持不变。The variation characteristics of both static strength and plasticity and dynamic strength and toughness at 566°C of 9Cr-1Mo-V-Nb-N steel were studied. Compared with those of room temperature, the static and dynamic strength were lower, so did elastic modulus and the ability of homogeneous plastic deformation. Moreover, the crack forming work reduced because of the decreasing of the strength, and the crack propagation work almost kept constant since the deflection enhancing because of the local concentrated plastic deformation.

关 键 词：9Cr-1 Mo-V-Nb-N钢 均匀塑性变形 局集塑性变形 颈缩 

分 类 号：TG142.73[一般工业技术—材料科学与工程] TG113.25[金属学及工艺—金属材料]