硬态切削高强度钢表面完整性的研究  

Research on Surface Integrity in Hard Turning of High Strength Steel

作　　者：耿琼[1] 解丽静[1] 王西彬[1] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081

出　　处：《新技术新工艺》2013年第3期60-64,共5页New Technology & New Process

基　　金：国家科技重大专项支撑项目(2009ZX04014-044)

摘　　要：高强度钢45CrNiMoVA以其良好的力学性能,被广泛作为车辆悬挂系统弹性零件扭杆的材料。45CrNiMoVA是典型的高强度钢,属于难加工材料,扭杆在实际应用中通常经常承受大应力、应变、冲击影响,疲劳寿命成为影响其断裂失效的重要参数。表面质量能够影响材料的疲劳强度、磨损率、耐腐蚀性等特征。硬态切削可以有助于在简化加工工艺的同时,达到预期的表面质量。对于已知的各种参数,如切削速度、进给率和切削深度对表面完整性都有很大的影响。在本试验中,表面完整性主要通过表面粗糙度、残余应力、微观硬度等方面进行分析。The high strength steel 45CrNiMoVA is the main material of the torsion shaft which is the elastic part for suspension system of vehicles, because of it＇s good mechanical property. 45CrNiMoVA is the typical high strength steel, which belongs to the hard-to-cut material. The shaft bears large stress, strain and impact, endurance life becomes the im- portant parameter of impacting fracture failure. Surface quality can impact endurance strength, wear rate, and corrosion re sistance and so on. Hard turning allows manufacturer to simplify their processes and still achieve the desired surface finish quality. To the known parameters like cutting speed, feed rate, and depth of cut have big impact on surface integrity. In this test, surface integrity was mainly analyzed through surface roughness, residual stress, and micro-hardness and so on.

关 键 词：硬态车削 表面完整性 残余应力 表面粗糙度 微观硬度 

分 类 号：TG1[金属学及工艺—金属学]