熔炼工艺对ZL114A铝合金铸件焊接性能的影响  

Influence of Melting Process on Welding Property about ZL114A Aluminum Alloy Casting

作　　者：侯继伟 魏芳 朱克宁 侯敏 周耀忠 

机构地区：[1]北京星航机电装备有限公司,北京100074 [2]空军驻京西地区军事代表室,北京100074

出　　处：《航天制造技术》2015年第1期36-39,共4页Aerospace Manufacturing Technology

摘　　要：通过试验分析了熔炼工艺对ZL114A铝合金铸件焊接性能的影响,结果表明,活性元素镁、锶、钛会使熔液大量吸气,焊接时气孔缺陷倾向增加;使用Al Ti4B可细化α初生相晶粒,缩小枝晶间孔隙,减轻焊接时气孔缺陷倾向;氩气精炼能有效去除合金熔液中的气和渣的含量,提高焊接质量;精炼后静置时间延长会使氢透过氧化膜向熔体内扩散,增加了合金液的气体含量,最终恶化焊接性能。The influence of melting process on welding property was analyzed by experiments about ZL114A aluminum alloy casting. The results show that active elements of Mg, Sr and Ti caused melting liquid absorb mass gases, and the orientation of gas hole increased during welding. The primary alpha grain size fined and the hole between dendrite shrank by using AlTi4B, accordingly the orientation of gas hole decreased. The impurity amount and gas content was wiped off effectively by argon purification, and the welding quality was increased. The gas content increased and the welding quality exacerbated finally while the hydrogen drilled through alumina film and diffused into melting liquid with holding time elongation.

关 键 词：ZL114A合金 熔炼工艺 焊接性能 

分 类 号：TG292[金属学及工艺—铸造] TG146.21[一般工业技术—材料科学与工程]