纯铜质蛇形通道复合处理对A390铝合金显微组织的影响
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摘要
采用水冷纯铜质蛇形通道浇注工艺和长效变质剂Sr复合细化工艺制备了半固态A390铝合金浆料,研究了Sr加入量对初生Si和共晶Si尺寸和形貌的影响。结果表明,采用该复合细化工艺可使半固态A390铝合金浆料中的初生Si细化和共晶Si变质同时得以实现,且随着Sr含量增加,半固态A390铝合金浆料组织中的初生Si和共晶Si晶粒都更加细小、均匀。
Semi-solid A390 aluminum alloy slurry was prepared by a water-cooled copper serpentine channel pouring process combined with long-acting Sr modifier.The effects of Sr content on the grain size and morphology of primary Si and eutectic Si in the semi-solid slurry were investigated.The results show that the primary Si and eutectic Si in the slurry are both refined by the composite refining technology.With increasing in Sr content,the primary Si and eutectic Si grains in the semi-solid A390 aluminum alloy slurry become smaller and more uniform.
Semi-solid A390 aluminum alloy slurry was prepared by a water-cooled copper serpentine channel pouring process combined with long-acting Sr modifier.The effects of Sr content on the grain size and morphology of primary Si and eutectic Si in the semi-solid slurry were investigated.The results show that the primary Si and eutectic Si in the slurry are both refined by the composite refining technology.With increasing in Sr content,the primary Si and eutectic Si grains in the semi-solid A390 aluminum alloy slurry become smaller and more uniform.
引文
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[2]赖华清,范宏训,徐祥.过共晶铝硅合金的研究及应用[J].汽车工艺与材料,2001(10):21-24.
[3]郝建飞.半固态成型工艺对A390合金显微组织及力学性能的影响[A].中国体视学学会金相与显微分析分会.第十五届全国金相与显微分析学术年会论文集[C].西宁,2016.
[4]CAMPBELL J,TIRYAKIOGLU M.Review of effect of P and Sr on modification and porosity development in Al-Si alloys[J].Materials Science and Technology,2010,26(3):262-268.
[5]LIU X F,WU Y Y,BIAN X F.The nucleation sites of primary Si in Al-Si alloys after addition of boron and phosphorus[J].Journal of Alloys and Compounds,2005,391(1/2):90-94.
[6]王泽华,毛协民,张金龙,等.Sr-PM复合变质过共晶铝硅合金[J].特种铸造及有色合金,2005,25(4):241-243.
[7]孙虎.过共晶铝硅合金复合变质的研究进展[J].科技咨询,2011(15):102-103.
[8]ZUO M,ZHAO D G,TENG X Y,et al.Effect of P and Sr complex modification on Si phase in hypereutectic Al-30Si alloys[J].Materials and Design,2013,47:857-864.
[9]陈冲.过共晶Al-20Si合金的复合变质研究[D].郑州:郑州大学,2007.
[10]毛卫民,高冲,朱达平,等.蛇形通道制备半固态铝合金浆料的研究[J].特种铸造及有色合金,2009,29(10):915-917.
[11]陈正周,毛卫民,吴宗闯.蛇形通道浇注制备半固态A356铝合金浆料微观组织的演变[J].特种铸造及有色合金,2011,31(1):32-35.
[12]朱文志,毛卫民,涂琴.蛇形通道浇注制备半固态浆料组织的演化[J].铸造,2014,63(4):341-346.
[13]ZHENG Z K,MAO W M,YAN B Q,et al.Refinement of primary Si grains of A390alloy slurry through serpentine channel pouring process[J].China Foundry,2015,12(6):431-439.
[14]CHEN F,CAO Z,CHEN G,et al.Synchrotron radiation microbeam analysis of the effect of strontium on primary silicon in Zn-27Al-3Si alloy[J].Journal of Alloys and Compounds,2018,749:575-579.
[15]祖方遒.变质元素对铸造Al-Si合金共晶结晶的作用及机制[J].铸造,2011,60(11):1 073-1 079.