摘要
研究了Al-Mg-Si铝合金氩弧焊结晶裂纹的形成机理。结果表明,产生结晶裂纹的原因是铝合金中的合金元素与铝生成低熔点共晶体液态薄膜,在焊缝凝固过程中,液态薄膜在焊接拉应力的作用下开裂,形成结晶裂纹。
The mechanisms for crystal cracks forming in AI-Mg-Si aluminum alloy was researched. The results show that the formation of crystal crack is caused by the aluminum and other alloying elements reacting together to make low melting-point eutectic liquid films during the cooling process. The liquid film under the welding tensile stress cracks, and then the crystal crack forms.
出处
《热加工工艺》
CSCD
北大核心
2013年第1期205-207,共3页
Hot Working Technology
基金
广西自然科学基金资助项目(2010GXNSFA183012)
关键词
铝合金
液态薄膜
拉应力
结晶裂纹
aluminum alloy
liquid film
tensile stress
crystal cracks
