连续YAG激光相变硬化三维瞬态温度场数值模拟  

Numerical simulation of 3-D transient temperature field during continuous YAG laser transformation hardening process

作　　者：张立文[1] 裴继斌[1] 德.豪松 王富岗[1] 夏元良[3] 

机构地区：[1]大连理工大学材料工程系,辽宁大连116024 [2]荷兰格罗宁根大学应用物理系 [3]大连理工大学三束材料改性国家重点实验室,辽宁大连116024

出　　处：《大连理工大学学报》2003年第2期191-195,共5页Journal of Dalian University of Technology

基　　金：辽宁省自然科学基金资助项目(9810300203);三束材料改性国家重点实验室开放课题资助项目.

摘　　要：采用差分法对连续YAG激光相变硬化三维瞬态温度场进行数值模拟.分析了激光相变硬化过程工件的传热学行为,考虑了工件有限尺寸、激光热流施加、工件材料热物性参数的温度依赖关系,工件表面辐射及空气对流造成的热损失以及材料固态相变等多方面特点.利用能量平衡法,推导了非均匀空间网格的有限差分方程,用Fortran语言编写了温度场的计算程序.分别计算了一系列工艺参数下42CrMo、60#碳钢激光相变硬化处理过程的三维瞬态温度场,并预测了激光相变硬化区的半宽度与深度.对42CrMo、60#碳钢进行激光相变硬化实验,实测了它们在各种工艺参数下处理后相变硬化区的半宽度与深度.计算结果与实验符合较好.The three-dimensional transient temperature fields of continuous YAG laser transformation hardening process were simulated using the difference method. The finite size of the laser treated sample, the surface heat loss of the sample, the latent heat loss of the sample, the latent heat of phase transformation, and the temperature dependence on thermal properties of materials were considered. Three-dimensional unequally spatial grid finite difference equations were deduced. The program to calculate the temperature field was developed using Fortran language. The transient temperature fields of 42Cr-Mo, C60 steel samples during laser transformation hardening process were calculated using the program, and the semi-widths and depths of laser transformation hardening zones were also predicted. The calculated semi-widths and depths of laser transformation hardening zones are in good agreement with the experimental results.

关 键 词：连续YAG激光相变硬化 数值模拟 差分法 温度场 激光表面处理 传热学 

分 类 号：TG156.99[金属学及工艺—热处理]