合金元素对铝合金熔体中氢含量的影响

Influence of Alloying Element on the Hydrogen Content of Aluminum Melt

以A356铝合金为基体合金,添加不同含量的Mg、Cu、Mn合金元素,然后在730℃下熔炼,保温30 min后减压浇铸,并利用减压凝固试样密度法来测量氢含量,以研究不同合金元素对铝熔体氢含量的影响。研究结果表明,合金元素Mg很大程度上加重了铝熔体的吸氢倾向,合金元素Mn也会增加铝熔体的吸氢倾向,但程度不大;而Cu则降低铝熔体的吸氢倾向。

The effects of alloying elements Mg, Mn and Cu on the hydrogen content of A356 aluminum alloy were studied by the reduced pressure test under the melting at 730 ℃ and casting after 30 rain. The results showed that the alloying element Mg largely increased the hydrogenabsorbing tendency of molten aluminum, Mn slightly increased the tendency of molten aluminum and, oppositely, Cu reduced the tendency of molten aluminum.