V-5Cr-5Ti合金粉末热锻技术研究  

Powder Hot-Forging of Cone-Shaped Parts of V-5Cr-5Ti Alloy

作　　者：林波[1] 杨维才[1] 曾大鹏[1] 董鲜峰[1] 单东伟[1] 迟永刚[1] 刘梅[1] 张全孝[2] 贾万明[2] 

机构地区：[1]中国工程物理研究院,四川绵阳621900 [2]中国兵器科学研究院宁波分院,浙江宁波315103

出　　处：《稀有金属材料与工程》2014年第4期990-994,共5页Rare Metal Materials and Engineering

摘　　要：针对经粉末冶金法制备的V-5Cr-5Ti合金锥形件预制坯，设计并加工了HIP及热锻的不锈钢包套。V-5Cr-5Ti合金采用双层包套封焊后进行了粉末热锻试验。试验结果显示：V-5Cr-5Ti合金1180℃经7-9火次粉末热锻，总变形量47．5％，经1000℃／2h退火处理后，晶粒平均尺寸约为100μm，其抗拉强度σb为490MPa，屈服强度σ02为368MPa，延伸率巧约为28％，断面收缩率ψ约为61．5％。Austenitic stainless steel cans of HIPing and hot forging were designed for a powder metallurgical cone-shaped part of V-5Cr-5Ti alloy. Machined double cans and cone-shaped part of V-5Cr-5Ti alloy were assembled and welded. The result shows that the mechanical properties of the V-5Cr-5Ti samples hot forged at 1180 ℃ for 7-9 forging fire times with a total deformation of 47.5% followed by annealing at 1000 ℃ for 2 h are excellent. The grain size of approximately 100 μm is achieved. The tensile strength, yield strength, elongation and area reduction reach 490 MPa, 368 MPa, 28% and 61.5%, respectively.

关 键 词：粉末冶金 V-5Cr-5Ti 粉末热锻 双层包套 机械性能 显微组织 

分 类 号：TG319[金属学及工艺—金属压力加工]