中国机械工程Issue(20)：2811-2815,5.DOI:10.3969/j.issn.1004-132X.2015.20.020
含孔洞缺陷焊接接头电磁热强化及组织与性能分析
Electromagnetic Heat Strengthening and Microstructure and Properties of Welded Joints with Hole Defects
摘要
Abstract
By a ZL-2 super pulse discharge generator,the welded joints of A356 aluminum alloy with hole defects were discharged by electromagnetic heating.Microstructure of welded joints and the microstructure near the hole were analyzed before and after discharge by metallographic microscope. Tensile property test of specimens was made by microcomputer control universal testing machines. Scanning electron microscope was used to observe the fracture organization.Hardness test was made by FM-700 microhardness tester before and after reinforcement.The results show that the appropriate pulse current has better crystal grain refinement effect.After reinforcement the microstructure of wel-ded joints becomes refining,mechanics property of the welding joints is improved,tensile strength is increased 1 1% and elongation is increased to 14.2% on average after pulse current experiments,and the hardness of welded joints increases obviously.关键词
电磁热强化/孔洞/焊接接头/A356 铝合金Key words
electromagnetic heating/hole defect/welded joint/A356 aluminum alloy分类
数理科学引用本文复制引用
付宇明,宋炳材,李艳芳,郑丽娟..含孔洞缺陷焊接接头电磁热强化及组织与性能分析[J].中国机械工程,2015,(20):2811-2815,5.基金项目
国家自然科学基金资助项目(51105325) （51105325）
河北省自然科学基金资助项目(E2014203223,E2015203217) （E2014203223,E2015203217）
河北省高等学校科学技术研究重点项目(ZH2012022) （ZH2012022）
