摘要
通过室温轧制和压缩变形法 ,研究了坯料厚度、变形率、表面状态等工艺因素对Al Sn Si/Al/steel层状复合材料粘结行为的影响 ,提出了变形复合模型。结果表明 :压缩变形法难以复合该层状复合材料 ,而当轧制变形率达到 4 5 %时 ,Al Sn Si/Al/steel就能获得良好的粘结效果 ,随坯料厚度的减小及变形率的增加 ,粘结强度亦增加 ;表面多向抛磨有利于改善粘结状态。粘结界面形貌表明 ,硬质Si粒子明显阻碍表面粘结 ,两接触表面塑性变形和流动是导致粘结的主要机制。
The effects of the thickness of raw sheets, deformation extent and surface situation on the cohesion strength of laminated Al Sn Si/Al/steel composites were studied by means of cold rolling and compression methods, respectively. Moreover, the bonding model of the deformation process was proposed. The results show that the laminated Al Sn Si/Al/steel could nearly be bonded by cold compression, but they could be bonded well by cold rolling so long as the deformation degree was up to about 45%. The cohesion strength increased with decreasing thickness of raw sheets and increasing deformation degree. The surface of multi direction polished had advantage to improve cohesion behavior. The interface morphology of laminated Al Sn Si/Al/steel composite shows that hard Si particles hindered bonding of the metals. The plastic deformation and flow of surface layer were main mechanism that results in bonding of laminated Al Sn Si/Al/steel.
出处
《机械工程材料》
CAS
CSCD
北大核心
2002年第10期30-34,共5页
Materials For Mechanical Engineering
基金
湖南省自然科学基金 (90 2 2 0 2 )
广东省重点学科基金资助项目 (9693 0 2 )
