摘要
本文对低温回火态GCr15轴承钢的激光束加热奥氏体化过程进行了研究.根据传热学原理,建立了激光束加热时的温度场和相变过程计算的数学模型,采用有限差分法进行计算,借助于Gauss-Seidle迭代法,在CDC计算机上进行运算、求解,得出了平板试样硬化层中的温度分布、奥氏体体积率、马氏体体积率与激光加热的工艺参量——激光束尺寸、功率密度与扫描速度间的关系曲线,为优选激光相变硬化工艺提供了初步理论依据.
The research of austenitizing process of tempered GCr15 bearingsteel during laser heating is presented here.Based on the principle of heattranster,a mathematic model was established of the temperature field and phasetransformation process during laser heating.By means of the finite differencemethod,calculation was carried out with Gauss-Seidle's alternating processon a CDC computer.The relationship between thn temperature distributionin the hardened profile of the plate specimen,the volume percentage ofaustenite and martensite and the technical parameters of laser heating wasmeasured.The present study offers a theoretical guideline for makingoptimum selection of laser hardening technical regulation.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
1991年第2期57-65,共9页
Journal of Shanghai Jiaotong University
关键词
热处理
激光
温度场
相变
加热
laser heating
temperature field
phase transformations
