CAJ | 학술논문

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AlTi4B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。
통과시험분석료용련공예대 ZL114A 려합금주건한접성능적영향，결과표명，활성원소미、송、태회사용액대량흡기，한접시기공결함경향증가；사용AlTi4B가세화α초생상정립，축소지정간공극，감경한접시기공결함경향；아기정련능유효거제합금용액중적기화사적함량，제고한접질량；정련후정치시간연장회사경투과양화막향용체내확산，증가료합금액적기체함량，최종악화한접성능。
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.