镁合金薄壁件的石膏型精密铸造

王狂飞; 许广涛; 张锦志; 周志杰; 米国发

doi:10.15980/j.tzzz.2014.06.020

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镁合金薄壁件的石膏型精密铸造
Production of Magnesium Alloy Thin-Walled Casting by Gypsum Mould Precision Casting
2014年34卷第6期页码：626-628
纸质出版日期： 2014 ，
DOI： 10.15980/j.tzzz.2014.06.020

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[1]王狂飞,许广涛,张锦志,周志杰,米国发.镁合金薄壁件的石膏型精密铸造[J].特种铸造及有色合金,2014,34(06):626-628.

Wang Kuangfei, Xu Guangtao, Zhang Jinzhi, et al. Production of Magnesium Alloy Thin-Walled Casting by Gypsum Mould Precision Casting[J]. Special Casting & Nonferrous Alloys, 2014,34(6):626-628.
[1]王狂飞,许广涛,张锦志,周志杰,米国发.镁合金薄壁件的石膏型精密铸造[J].特种铸造及有色合金,2014,34(06):626-628. DOI： 10.15980/j.tzzz.2014.06.020.

Wang Kuangfei, Xu Guangtao, Zhang Jinzhi, et al. Production of Magnesium Alloy Thin-Walled Casting by Gypsum Mould Precision Casting[J]. Special Casting & Nonferrous Alloys, 2014,34(6):626-628. DOI： 10.15980/j.tzzz.2014.06.020.

摘要

对镁合金石膏型熔模铸造不同浇注方式进行了对比试验和充型过程模拟。结果表明

由于石膏型透气性差

低压铸造方法要优于重力铸造。薄壁镁合金铸件的主要缺陷是冷隔

重力铸造冷隔程度比较严重

而且很难通过改善工艺消除;而低压铸造基本无冷隔缺陷

即使出现轻微冷隔

也很容易通过提高浇注温度和增加压力的方法消除。重力铸造无法避免铸件的氧化

而低压铸造通过一定措施可使铸件不氧化。

Abstract

Comparative experiments were carried out by different pouring method for gypsum mould investment casting Mg alloy.The simulated results show that low pressure casting method is superior to gravity casting due to the poor permeability.The results show that thin-walled Mg alloy casting defects are mainly coldshut.For gravity casting

coldshut is serious

and it is difficult to eliminate by improving process

while for the low pressure casting

casting coldshut can be eliminated.Even if there is a slight coldshut

it is also easy to remove through improving pouring temperature and pressure.In addition

gravity casting cannot aviod casting oxidation

however

low pressure casting can realize oxidation-free by taking some measures.