考虑相变诱导塑性下40Cr激光淬火工艺参数显著性分析  

Significance of 40Cr laser quenching process parameters considering transformation induced plasticity

作　　者：李昌[1] 邓双九 高鹤芯 韩兴[1] LI Chang;DENG Shuangjiu;GAO Hexin;HAN Xing(School of Mechanical Engineering and Automation,University of Science and Technology Liaoning,Anshan Liaoning 114051,China)

机构地区：[1]辽宁科技大学机械工程与自动化学院,辽宁鞍山114051

出　　处：《航空动力学报》2024年第4期84-98,共15页Journal of Aerospace Power

基　　金：辽宁省高等学校创新人才支持计划(20201020)。

摘　　要：定量化揭示激光淬火过程多场耦合瞬时演变规律,进而实现40Cr激光淬火工艺参数显著性分析。基于相图计算法(CALPHAD)计算温变物性参数,建立40Cr齿轮钢激光淬火数值模型,对瞬态温度、相变以及应力分布进行数值计算,揭示相变行为与塑性应力之间的耦合作用机理。通过Axio Vert.A1显微镜、扫描电子显微镜(SEM)、超景深3D显微镜和显微硬度仪进行分析。基于正交试验,分析了激光半径、激光功率、扫描速度对淬火质量的显著性影响。结果表明:影响最高温度和相变深度的显著工艺参数依次为光斑直径、扫描速度、激光功率;残余应力成“驼峰”分布,影响残余拉应力的显著工艺参数依次为光斑直径、激光功率、扫描速度。该研究为有效控制淬火残余应力,优化工艺参数提供重要理论依据。The multi-field coupling instantaneous evolution law of laser quenching process was quantitatively revealed,then the significance analysis of 40Cr laser quenching process parameters was carried out.Based on the calculation of phase diagram(CALPHAD)method,the temperature changes physical properties of the material were calculated,and the coupled numerical model of 40Cr gear steel during laser quenching was established.Numerical calculations of the transient temperature,phase transition,and stress distribution of 40Cr laser quenching revealed the interaction mechanism between phase transition behavior and plastic stress.Axio Vert.A1 microscope,scanning electron microscope(SEM),super depth of field 3D microscope,and microhardness tester were used for analysis.The significant effects of laser radius,laser power,and scanning speed on quenching quality were analyzed based on orthogonal experiments.The results showed that the significant process parameters affecting the maximum temperature and phase transformation depth were spot diameter,scanning speed and laser power.The distribution of residual stress was“hump”,and the significant process parameters affecting the residual tensile stress were spot diameter,laser power and scanning speed.This research provides an essential theoretical basis for effectively controlling residual quenching stress and optimizing quenching process parameters.

关 键 词：40Cr齿轮钢 激光淬火 多场耦合 相变诱导塑性 正交试验 

分 类 号：V252.1[一般工业技术—材料科学与工程] TG156.3[航空宇航科学与技术—航空宇航制造工程]