摘要
采用差示扫描量热法研究了2024-T35l铝合金搅拌摩擦焊接过程中时效相回溶或粗化的相对值,给出了一种定量研究搅拌摩擦焊接过程中时效相行为的方法。结果表明:相对于母材,焊缝不同区域时效相的回溶或粗化值可通过公式f=S_x/S_(BM)-1来计算;当搅拌摩擦焊搅拌头转速为700r·min^(-1),焊接速度为200mm·min^(-1)时,2024-T351铝合金焊缝轴肩作用区的S相对于母材的回溶值为23.3%,同时硬度相对于母材下降了23.8%;S相发生回溶或粗化主要取决于焊接热量的高低。
The relative value of dissolution or coarse for aging phases in 2024-T351 aluminum alloy during friction stir welding（FSW）process was characterized by differential scanning calorimetry（DSC）method,and a quantitative method to investigate the aging phase behavior during FSW process was revealed.The results show that the dissolution or coarse relative value of aging phases in welded zone of 2024-T351 aluminum alloy could be obtained by formula of f=Sx/SBM-1.Compared with the base metal,the dissolution relative value of S phase in the shoulder active zone（SAZ）of 2024-T351 aluminum alloy was 23.3%when the rotary speed of 700r·min^-1 and welding speed of 200 mm·min^-1.and the hardness decreased 23.8%.The dissolution or coarse of S phase depended on the thermal profile generated by FSW.
出处
《理化检验（物理分册）》
CAS
2011年第4期199-203,208,共6页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
基金
航空科学重点基金资助项目(2009ZE25007)
作者简介
康举（1983-），男，硕士。
