【摘要】：通過研究熱處理工藝對Al-Mg-Si-Zr-Er合金組織與性能的影響,確定了合金板材的峰時(shí)效熱處理工藝,探討了合金的析出與強(qiáng)化行為。研究結(jié)果表明:540℃固溶1 h后,合金板材的析出相得到充分溶解,再結(jié)晶組織也未發(fā)生明顯粗化;時(shí)效時(shí),合金的析出相主要為Mg2Si、Al Cu Mg Si(Q相)和Cu Al2等;Er和Zr元素的加入促進(jìn)了β″相析出,并使β″相變得更為細(xì)小彌散,從而縮短了時(shí)效時(shí)間,提高時(shí)效強(qiáng)化效果;合金的峰時(shí)效工藝為540℃固溶1 h,180℃時(shí)效5 h;合金的時(shí)效強(qiáng)化是位錯(cuò)切過機(jī)制和繞過機(jī)制的綜合作用;合金的較高強(qiáng)度源于合金凝固組織細(xì)化、Al3(Er,Zr)粒子的彌散強(qiáng)化以及Er和Zr元素的加入促進(jìn)β″相析出細(xì)化等共同作用的結(jié)果。
[Abstract]:By studying the effect of heat treatment process on the microstructure and properties of Al-Mg-Si-Zr-Er alloy, the peak aging heat treatment process of alloy sheet was determined, and the precipitation and strengthening behavior of the alloy were discussed. The results show that after solid solution at 540 鈩，

本文編號：2481473