摘要
在介绍摩擦塞焊原理和优点的基础上,经过初步试验,分析了LY12铝合金摩擦塞焊接头的金相组织和硬度分布。结果表明,LY12铝合金摩擦塞焊接头明显分为五个区域,即母材、母材与塑化区Ⅰ过渡区、塑化区Ⅰ、塑化区Ⅰ和塑化区Ⅱ之间的过渡区、塑化区Ⅱ。其中塑化区Ⅰ和塑化区Ⅱ的材料发生了强烈的变形和流动,但流动方式和变形方式不同;硬度分布则是从母材区开始,硬度值逐渐下降,在塑化区Ⅰ达到最低值,随后硬度值逐渐增大,在塑化区Ⅱ趋于稳定且与母材硬度值相当。
Friction plug welding is a novel solid state joining and repairing process. Based on the introduction of basic principle of friction plug welding process, preliminary studies on microstructure and hardness distribution of friction plug welded joint were carried out. It is shown that five zones could be easily identified in LY12 joint, i.e. the base metal, plastic zoneⅠ, the transition zone between base metal and plastic zoneⅠ, plastic zoneⅡ, the transition zone between plastic zoneⅠand plastic zoneⅡ. Drastic material deformation and metal flow occurr in plastic zoneⅠand Ⅱ, but these two zones have different flow patterns. Hardness of the joint decreases from the base metal and reaches a minimum in the plastic zoneⅠ, and then gradually increases to a stable level in plastic zoneⅡwhich equal to the base metal. The other side of the joint has the same trend of hardness distribution.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2006年第10期1-3,共3页
Transactions of The China Welding Institution
关键词
LY12铝合金
摩擦塞焊
组织
硬度
LY12 aluminum alloy
friction plug welding
microstructure
hardness
