摘要
采用ANSYS分析软件对45钢焊接接头电磁热强化过程进行了数值仿真,并对其强化后的温度场和残余应力场进行了分析.结果表明,电磁热强化使焊接接头内部裂纹尖端钝化,减少了应力集中,焊接裂纹尖端形成了3向残余压应力场.通过ZL-2型脉冲放电装置对45钢焊接接头进行了电磁热强化试验,并对其进行了强化前后力学性能对比分析.经过脉冲放电强化后的焊接接头抗拉强度和断后伸长率均有所提高,其力学性能得到了改善.数值分析和试验研究均证实了电磁热强化技术应用到焊接领域的可行性.
Numerical simulation on welded joint of 45 steel using electromagnetic heating was made by ANSYS.The temperature and residual stress field were analysed.The result showed that the crack tip in the welded joint melted and dulled after discharge,the stress concentration also was reduced,in addition,the three residual compressive stress field around welded crack tip was appeared.The tensile properities were tested to compare the mechanical performance before and after pulsed current discharges.The result indicated that tensile strength and elongation were improved.Numerical analysis and experimental research confirmed the feasibility of applying electromagnetic heat strengthening technology into welding field.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2011年第10期5-8,113,共4页
Transactions of The China Welding Institution
基金
国家自然科学基金资助项目(50675190
51075351
51105325)
关键词
焊接接头
埋藏裂纹
电磁热强化
数值分析
力学性能
welded joint
embedding crack
electromagnetic heat strengthening
numerical analysis
mechanical properties
