铬镍钼钛钢高温组织和高温性能研究  

High Temperature Microstructure and Mechanical Properties of Cr-Ni-Mo-Ti Steel

作　　者：刘俊[1] 黄振翅[1] 毕雅敏[1] 

机构地区：[1]中国工程物理研究院机械制造工艺研究所,四川绵阳621900

出　　处：《机械工程材料》2001年第11期11-13,共3页Materials For Mechanical Engineering

摘　　要：用高温短时拉伸试验和高温金相试验研究了某种铬镍钼钛钢的高温组织和高温性能。试验结果发现铬镍钼钛钢的强度值随着温度的升高逐渐降低 ,塑性值在 70 0℃左右表现出一个低谷 ,之后大幅度升高。并用扫描电镜对每个温度的断口进行了形貌分析 ,结果发现 。High temperature microstrufture and high temperature mechanical properties have been studied by means of high temperautre tensile testing and metallography. It is found that the tensile and yield strength gradually decreases when the temperautre increases, but the ductility has low values at about 700℃ and then dramatically raises from 700℃ to 900℃. SEM obsrvation has been conducted on the fracture surfaces of short term high temperautre tensile spectimens. It is proved that the fracture surfaces of Cr Ni Mo Ti steel characterize with dimple fracture.

关 键 词：高温组织 高温性能 断口形貌 韧窝断裂 铬镍钼钛钢 

分 类 号：TG142.73[一般工业技术—材料科学与工程]