摘要
建立了相变体积应变与混合相力学性能的固态相变模型,同时考虑随动硬化与相变塑性的影响,研究了各因素对1Cr12钢焊缝冷却动态力学行为的影响规律。在此基础上,开展了焊接试验件纵向残余应力的验证试验,试验结果与模拟结果吻合良好。研究结果表明:马氏体相变的体积膨胀、力学性能变化以及塑性机制均对焊缝收缩的动态力学行为有一定的影响,且各因素共同作用下焊缝纵向应力由收缩拉伸状态转为受压状态。
Considering the following hardening and transformation plasticity,the solid-state transformation model of volume strain and mixed-phase mechanics properties was established.The effects of various factors on the dynamic mechanics behavior of 1Cr12 steel weld cooling were studied.The experiments of welding longitudinal residual stress were carried out,the results of tests are in good agreement with the simulation ones.It is shown that the volume expansions of martensitic transformation,the changes of mechanics properties and the plastic mechanism have influences on the dynamic mechanics behaviors of weld shrinkages,and the longitudinal stress of weld joint changes from contraction tensile states to compression states under the action of various factors.
作者
许谦
胡广旭
董志波
任新星
方洪渊
XU Qian;HU Guangxu;DONG Zhibo;REN Xinxing;FANG Hongyuan(Xinjiang Astronomical Observation,Chinese Academy of Sciences,Urumqi,830001;Key Laboratory of Radio Astronomy,Chinese Academy of Sciences,Urumqi,830011;School of Light Industry,Harbin University of Commerce,Harbin,150028;State Key Laboratory of Advancd Welding and Joining,Harbin Institute of Technology,Harbin,150001)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2021年第3期341-347,共7页
China Mechanical Engineering
基金
国家自然科学基金天文联合基金(U1731135)
黑龙江省青年创新人才项目(UNPYSCT-2018133)
中国科学院天文台站设备更新及重大仪器设备运行专项经费(2016058)。
关键词
固态相变
焊缝收缩力学
有限元方法
材料模型
solid phase transformation
mechanics of weld contraction
finite element method
material model
