摘要
为定量分析大型锻件淬火加工过程中工艺参数的影响 ,应用非线性有限元 ,建立了淬火过程数值模拟的三场耦合模型 .模型考虑了温度场、应力场、组织场及其耦合关系 :热膨胀、塑性功生热、变温相变、相变潜热、应力诱导相变和相变膨胀及相变塑性等的效应 .模拟了由锻件金属材料 2 6Cr2Ni4MoV制成的空心圆筒工件在不同尺寸和工艺下的淬火过程 ,计算得到的冷却曲线及残余应力分布与实验结果一致 .数值实验表明只有考虑应力诱导相变和相变塑性的作用 。
A nonlinear finite element model with thermo-mechano-metallurgical coupling is proposed to simulate the quenching process. The model is divided into temperature field, stress field and microstructure field, and their coupling calculation. Thermal dilation, heat generation from plasticity work, transformation under varying temperature, transformation latent heat, stress-induced transformation, transformation dilation, and transformation-induced plasticity are considered. Cylindrical tube work pieces made of steel 26Cr2Ni4MoV were simulated for different dimensions and processing schemes. The cooling curves and residual stress distributions calculated were in agreement with the experimental results. Numerical experiments show that results can be reasonable and accurate only with the consideration of effects of stress-induced transformation and transformation-induced plasticity.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2002年第3期302-307,共6页
Journal of Harbin Institute of Technology
基金
国家自然科学基金资助项目 (5 0 175 0 60 )
