Al-Si-Mn系合金Mn致细化"中毒"效应的研究
Mn-induced Refining Poisoning Effect in Al-Si-Mn Alloys
段宏 1陈彦宏 2刘桂亮 3王维裔 1韩梦霞 1孙谦谦 3蔡增辉 2王志伟 2刘相法1
作者信息
- 1. 山东大学材料液固结构演变与加工教育部重点实验室,济南 250061
- 2. 中国航发哈尔滨东安发动机有限公司,哈尔滨 150066
- 3. 山东大学材料液固结构演变与加工教育部重点实验室,济南 250061;山东吕美熔体技术有限公司,济南 250061
- 折叠
摘要
随着再生铝用量逐渐增加,用于改善Fe相形貌的Mn元素在铝合金中的重要性愈加凸显.然而,向Al-Si-Mn合金中加入Al-Ti-B中间合金时,存在Mn致细化"中毒"现象,且"中毒"程度随Mn(或Si)含量的增加而逐渐加深.利用光学显微镜、扫描电镜、Pandat软件等手段,研究了 Mn致细化"中毒"机理.结果表明,ASM系合金中Mn含量较高时,凝固初晶相为Al15FeMn3Si2,该相包覆了游离在铝合金熔体中的钛化物粒子,使之失去形核衬底作用,从而导致细化"中毒".提出添加少量Ti调控ASM系合金中初生相和辅助Al-Ti-C-B(Al-TCB)晶种合金来有效缓解Mn致细化"中毒"的新工艺.
Abstract
With the gradual increase in amount of recycled aluminum,Mn element,which is used to improve the mor-phology of Fe phase,plays an increasingly important role in aluminum alloys.However,Mn-induced refining poison-ing effect occurs in Al-Si-Mn(ASM)alloys with Al-Ti-B alloy addition,of which the degree deepens with the increase of Mn(or Si)content.The mechanism of Mn poisoning was revealed by means of optical microscopy,scan-ning electron microscopy and Pandat software.The results indicate that the primary solidification phase of Al15FeMn3Si2 is observed with higher Mn content in ASM alloys,which covers the free titanium particles in the alumi-num alloy melt,leading to the miss of nucleation substrate and resulting in the poisoning phenomenon.A new process was proposed to regulate the primary phase in ASM alloys with a small amount of Ti with assistance of Al-Ti-C-B(Al-TCB)seed alloy to effectively alleviate Mn-induced refining poisoning.
关键词
Al-Si-Mn系合金/Al-TCB晶种合金/晶粒细化/Mn致细化"中毒"Key words
Al-Si-Mn Alloy/Al-TCB Seed Alloy/Grain Refinement/Mn-induced Refining Poisoning引用本文复制引用
出版年
2024
NETL
NSTL
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