摘要
对采用再结晶退火方式细化的挤压态AZ61镁合金和7075铝合金进行真空扩散焊接研究。剪切强度试验结果表明,在固定压力为10 MPa和真空度为18 Pa下,影响扩散焊接头性能的主要因素为扩散温度和保温时间。扩散焊接头界面处呈现三个区域,焊缝处的铝侧显微硬度最大,由扩散区向母材方向,显微硬度逐渐减小。
A study on vacuum diffusion bonding of as-extruded AZ61 alloy and 7075 aluminum alloy were carried out according to atomic diffusion theory. The grain size of as-extruded AZ61 alloys is refined by recrystallization annealing. The shear strength results show that, in a particular situation ,the bonding pressure and vacuum degree are fixed as 10MPa and 1SPa ,respectively, the diffusion temperature and holding time has a great effect on the quality of the bonding joints. The diffusion welded joint and the surrounding area present three transition zone. The maximum microhardness is at the aluminum side of the joint. By the direction of diffusion zone to the matrix metal, the microhardness decreases gradually.
出处
《热加工工艺》
CSCD
北大核心
2014年第21期26-28,31,共4页
Hot Working Technology
基金
国家自然科学基金资助项目(51374152)
山西省自然科学基金资助项目(2013011042-3)
