摘要
成功实现3 mm厚6082铝合金搅拌摩擦焊接,探究了不同焊速对其接头力学性能的影响,并对接头的腐蚀性能展开研究。结果表明:焊速从80 mm/min增大到120 mm/min的过程中接头抗拉强度增大较快,在120 mm/min时抗拉强度最大,为200.36 MPa。晶间腐蚀实验表明接头在不同时间内均发生了晶间腐蚀,这是由于晶界处析出的第二相粒子与晶粒内部产生了电位差。随着时间的增加,腐蚀逐渐向晶粒内部扩展,最终发展成腐蚀坑。微区电化学和浸泡腐蚀实验表明热影响区的平均阻抗值最低,耐腐蚀性能最差,而焊核区表现出最佳的耐腐蚀性。
The friction stir welding of 3 mm thick 6082 aluminum alloy was successfully realized,and the influence of different welding speeds on the mechanical properties of the joint was investigated,and the corrosion properties of the joint was studied.The results show that the tensile strength of the joint increases rapidly when the welding speed increases from 80 mm/min to 120 mm/min.The maximum tensile strength reaches 200.36 MPa at 120 mm/min,which reaches 63.6%of the strength of the base metal.The intergranular corrosion experiment showed that the joint had intergranular corrosion at different times,which was due to the potential difference among the second phase particles precipitated at the grain boundary and the grain interior.With the increase of time,the corrosion gradually extended to the interior of the grains and eventually developed into corrosion pits.The local electrochemical and immersion corrosion experiments show that the average impedance value of the heat affected zone is the lowest,and the corrosion resistance is the worst,while the weld nugget zone shows the best corrosion resistance.
作者
朱晓腾
梁凯铭
张华
王彩妹
胡正根
李会朝
ZHU Xiaoteng;LIANG Kaiming;ZHANG Hua;WANG Caimei;HU Zhenggen;LI Huizhao(School of Mechanical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China;Beijing Institute of Aerospace Systems Engineering,Beijing 100076,China)
出处
《有色金属工程》
CAS
北大核心
2023年第11期16-22,共7页
Nonferrous Metals Engineering
基金
北京市属高校分类发展项目(11000023T000002199202)
北京石油化工学院交叉科研探索项目(BIPTCSF-013)。
关键词
6082铝合金
搅拌摩擦焊
微观组织
力学性能
腐蚀行为
6082 aluminum alloy
friction stir welding
microstructure
mechanical property
corrosion behavior
