豪克能技术对铁路钢轨的强化研究  

Research on the Strengthening of Railway Rails by Hawking Technology

作　　者：李建伟[1] 孙静涵[1] 杨庚 LI Jianwei;SUN Jinghan;YANG Geng(Track Mechanical Maintenance Branch,China Shenhua Energy Company Limited,Tianjin 300467,China;Shandong Huawin Electrical and Mechanical Technology Co.,Ltd.,Jinan Shandong 250101,China)

机构地区：[1]中国神华能源股份有限公司轨道机械化维护分公司,天津300467 [2]山东华云机电科技有限公司,济南250101

出　　处：《高速铁路新材料》2023年第1期33-38,共6页Advanced Materials of High Speed Railway

基　　金：国能铁路装备有限责任公司科技研究开发项目(SWKY-19-05)。

摘　　要：研究了一种非加热、非增材的豪克能钢轨表面强化新技术,以U78CrV、U75V两种材质的钢轨为研究对象,应用正交试验法,以硬化层深度和表层硬度提升率为判断依据,通过极差分析得出每种钢轨的最优豪克能强化工艺。结果显示:最优工艺强化后钢轨硬化层深度不小于2.6 mm,表层硬度提升率不低于18.74%;钢轨耐磨性能提升50%以上;钢轨表层残余拉应力彻底转变为高值压应力,压应力层深度不小于3 mm;钢轨表面粗糙度由3.240μm降低至1.603μm,表面状态优化效果明显。A new hawking rail surface strengthening technology of non heating and non additive was studied.With the rails made of U78CrV and U75V as the research objects,the optimal hawking strengthening technology for each rail was obtained through range difference analysis by using orthogonal test method and taking the hardened layer depth and surface hardness increase rate as the judgment basis.The rail was strengthened with the optimal process,and samples were prepared and tested.The results showed that the depth of hardened layer after the optimal process strengthening was no less than 2.6 mm,and the hardness increase rate of the surface layer was no less than 18.74%.The wear resistance of rail was improved by more than 50%.The residual tensile stress on the rail surface was completely transformed into a high value compressive stress,and the depth of the compressive stress layer was no less than 3 mm.At the same time,the rail surface roughness decreased from 3.240 μm to 1.603 μm.The effect of surface state optimization was obvious.

关 键 词：钢轨 豪克能 硬度 摩擦磨损 残余应力 粗糙度 

分 类 号：TG142[一般工业技术—材料科学与工程] U213.4[金属学及工艺—金属材料]