摘要
采用拉伸试验、弯曲试验、硬度试验、扫描电镜断口形貌观察、显微组织分析、显微硬度测试等方法研究了高速钢W6Mo5Cr4V2(以下简称M2)与合金结构钢40Cr的真空扩散焊.结果表明,焊接温度为1 100℃,焊接压力为20 MPa,保温时间为30 min,真空度不低于0.1 Pa的条件下即可以实现高速钢与合金结构钢良好的冶金结合;拉伸试验、弯曲试验的断裂均发生在40Cr上.因此,可以认为在此工艺下所得焊接结合面的强度已经高于40Cr的抗拉强度与抗弯强度,低淬低回工艺可以保证高速钢和合金结构钢均具有满足使用要求的硬度.
The vacuum diffusion welding of high speed steel W6Mo5Cr4V2(M2) with alloy structure steel 40Cr was studied by means of hardness test,tensile test,bending test,scanning electron microscope and OM analysis.Results show that sound metallurgical bonding is obtained between the two dissimilar materials at 1 100 ℃ for 30 minutes,which bonding pressure is 20 MPa and the vacuum level is not less than 0.1 Pa.The fractures of tensile test and bending test both take in place on the steel of 40Cr.So the strength of bonding zone is higher than 40Cr matrix.Ionnealing after quenching treatment at atrelatively lower temperature can ensure the required hardness of both the high speed steel and the structural alloy steel.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2009年第3期37-40,共4页
Transactions of The China Welding Institution
基金
大连市计划基金资助项目(2006A10GX053)
关键词
M2/40Cr异种材料
真空扩散焊
力学性能
断口相貌
显微组织
M2/40Cr dissimilar materials
vacuum diffusion welding
mechanical property
fracture morphology
microstructures
