摘要
为了找到淬火过程中零件产生不规则扭曲变形的原因,选择了H型截面零件为研究对象,建立了相应的有限元分析模型,利用自开发的淬火过程有限元模拟软件对温度、组织和应力/应变进行了耦合分析。通过有限元模拟,得到了温度变化、相变及相变塑性对残余应力及淬火变形的影响,给出了零件内部弹性区及塑性区的演变过程。分析结果表明:零件在淬火过程中经历"弹性-塑性-弹性-塑性-弹性"的演变过程;在淬火过程中,相变塑性导致零件发生不均匀、无规律的扭曲变形。
In order to find out the reason of un-regular distortion in quenching process,the finite element model of an H-shape cross section part was built.Using a self-developed FEM（finite element method） software,the quenching of this part was simulated by FEM and metallo-thermo-mechanical coupled analysis method.According to the results of FEM simulation,the effect of temperature variation,phase-transformation and phase-transformation plasticity on the residual stresses and quenching distortion were attained,the evolvement of elastic and plastic region in the quenched part was also given.The FEM results show that the quenching part undergoes the process of elastic-plastic-elastic-plastic-elastic and the phase-transformation plasticity results in the unhomogeneous and anomalistic distortion of quenched part.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2011年第1期128-133,共6页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(50875154)
教育部"长江学者和创新团队发展计划"(IRT0931)
山东大学自主创新基金(2010TS035)
关键词
淬火
残余应力
变形
有限元
quenching
residual stress
distortion
finite element method
