车轮热处理过程中残余应力的分析  

Residual stress analysis of railway wheel in heat treatment

作　　者：安涛[1] 沈晓辉[2] 章静[2] 阎军[2] 

机构地区：[1]马鞍山钢铁股份有限公司车轮公司,安徽马鞍山243010 [2]安徽工业大学材料科学与工程学院,安徽马鞍山243002

出　　处：《重型机械》2007年第2期47-50,共4页Heavy Machinery

基　　金：安徽省重点科研计划项目(07021007)

摘　　要：综合考虑了温度、相变及应力的耦合作用,运用有限元法分析了车轮热处理过程中残余应力的产生及分布,并进行了测试。在淬火开始阶段车轮踏面附近分布周向拉应力,深部受压,在淬火60 s时踏面拉应力达到最大,随后冷却过程中踏面附近拉应力逐渐减小并转化为压应力,通过测试和计算,KKD车轮踏面的最大残余压应力为120 MPa左右,压应力区深度达到45 mm。Residual stress in railway wheel in heat treatment is analyzed with finite element method, in which the coupling of temperature, phase transformation and stress is considered fully. Residual stress testing is carried out, too. In the initial moment of quenching, tensile circumferential stress appeared in the tread of wheel, and the tensile stress reached maximal when at 60 s after quenching began; the tensile stress gradually became compressive in the subsequently cooling process. Finally, residual circumferential stress in the tread of KKD wheel reached to 120 MPa, and the depth of the compressive stress came to45 ram.

关 键 词：车轮 残余应力 有限元 测试 

分 类 号：TG312[金属学及工艺—金属压力加工]