压铸铝合金熔炼过程中除渣及精炼除气的分析
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摘要
压铸铝合金熔炼是压铸生产过程中的一个重要工序,熔炼工艺控制不严,会造成Al液含渣量及含气量增多,并且会使化学成分产生变化,导致铸件产生针孔、氧化夹渣、缩松和化学成分不合格,影响铸件品质。通过对熔炼过程中熔炼前的新旧料配比,熔炼温度,Al液除渣净化、精炼除气等关键工序进行试验研究,确定合理的工艺范围,从而提供优质Al液,最终获得合格铸件。
Die-casting aluminum alloy smelting is an important process in the process of die-casting production.The un-strictly control of smelting process would lead to the increase of slag content and gas content in liquid aluminum and chemical composition change,resulting in pinhole,oxidation slag inclusion,shrinkage porosity and unqualified chemical composition,and affecting the quality of the casting.The key processes such as the mixture of old and new materials before smelting,smelting temperature,smelting slag removal and purification of liquid aluminum,refining and degassing were analyzed and discussed,so as to determine a reasonable process range,providing high-quality liquid aluminum and obtaining qualified castings.
Die-casting aluminum alloy smelting is an important process in the process of die-casting production.The un-strictly control of smelting process would lead to the increase of slag content and gas content in liquid aluminum and chemical composition change,resulting in pinhole,oxidation slag inclusion,shrinkage porosity and unqualified chemical composition,and affecting the quality of the casting.The key processes such as the mixture of old and new materials before smelting,smelting temperature,smelting slag removal and purification of liquid aluminum,refining and degassing were analyzed and discussed,so as to determine a reasonable process range,providing high-quality liquid aluminum and obtaining qualified castings.
引文
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[7]薄冰,潘冶,陆韬,等.工艺参数对ADC12铝合金压铸件微孔缺陷与力学性能的影响[J].铸造,2017,66(2):127-130.
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[9]李荣德,于海朋,袁晓光.合金元素在压铸合金中的作用及研究现状[J].特种铸造及有色合金,2004(1):18-21.
[10]徐有东,陈诚,张军军.铁含量对压铸铝合金力学性能的影响[J].广东化工,2015,42(1):28-29.
[2]王金太,金吉琰.保证压铸铝合金熔炼质量的几点经验[J].铸造技术,2007,28(12):1 610-1 611.
[3]李建国,史子木,黄敏,等.炉料组态对A356铝合金轮毂显微组织的影响[J].特种铸造及有色合金,2005(S1):4-6.
[4]龙乔,宫林松,铝合金液除气时间对密度的影响[A].2017重庆市铸造年会论文集[C].重庆,2017.
[5]张子才,铝熔体旋转喷吹的除气效果及其对成分的影响[J].铸造,2004,53(6):147-149.
[6]刘云,侯击波,党惊知.旋转除气法对铝硅合金精炼效果的研究[J].热加工工艺,2009,38(11):72-74.
[7]薄冰,潘冶,陆韬,等.工艺参数对ADC12铝合金压铸件微孔缺陷与力学性能的影响[J].铸造,2017,66(2):127-130.
[8]徐飞跃,安肇勇,万里,等.压铸高强韧铝合金汽车底盘结构件的组织与力学性能[J].特种铸造及有色合金,2016,36(6):616-619.
[9]李荣德,于海朋,袁晓光.合金元素在压铸合金中的作用及研究现状[J].特种铸造及有色合金,2004(1):18-21.
[10]徐有东,陈诚,张军军.铁含量对压铸铝合金力学性能的影响[J].广东化工,2015,42(1):28-29.