Easy Collapse Gypsum Mould for Investment Casting Complicated Thin-walled Magnesium Alloy Parts

Cheng Lu~1; DongXuanpu~1; Ma Rong~1; Chen Shuqun~1; Feng Yanli~2

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Easy Collapse Gypsum Mould for Investment Casting Complicated Thin-walled Magnesium Alloy Parts
Vol. 31, Issue 8, Pages: 736-739(2011)
Published： 2011 ，
DOI：

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[1]程鲁,董选普,马戎,陈树群,冯艳丽.熔模铸造复杂薄壁镁合金易溃散性石膏型研究[J].特种铸造及有色合金,2011,31(08):736-739.

Cheng Lu~1, DongXuanpu~1, Ma Rong~1, et al. Easy Collapse Gypsum Mould for Investment Casting Complicated Thin-walled Magnesium Alloy Parts. [J]. Special Casting & Nonferrous Alloys 31(8):736-739(2011)
[1]程鲁,董选普,马戎,陈树群,冯艳丽.熔模铸造复杂薄壁镁合金易溃散性石膏型研究[J].特种铸造及有色合金,2011,31(08):736-739. DOI：

Cheng Lu~1, DongXuanpu~1, Ma Rong~1, et al. Easy Collapse Gypsum Mould for Investment Casting Complicated Thin-walled Magnesium Alloy Parts. [J]. Special Casting & Nonferrous Alloys 31(8):736-739(2011) DOI：

摘要

研究高铝矾土与石英粉混合填料对石膏混合料性能的影响

确定其合适的比例

在此基础上向混合料中加入各种添加剂（减水剂、MgSO4、Na3PO4、尿素）以改善其性能

并进行了实际零件的浇注。试验研究得出水溶性石膏型的适宜配比为:石膏与填料质量比为1:1

减水剂、MgSO4、Na3PO4的加入量（质量分数）分别为1.0%、20%、0.10%～0.15%

尿素与石膏质量比为1:10

浇注试验显示本研究的石膏型能够铸造出质量优异的镁合金铸件。

Abstract

Effects of mixed filler of high bauxite and quartz on the properties of gypsum mixture were investigated to determine the rational proportion of gypsum and filler.And then several additives such as polycarboxylic acid type water-reducer

MgSO4

Na3PO4

and CO（NH2）2 were added into the gypsum mixture to improve its properties.Meanwhile

the pouring experiment was implemented.The optimal proportion was obtained by the experiment.The proportion of gypsum and filler is 1:1

and water-reducer addition

MgSO4 and Na3PO4 are 1.0%

20%

0.1%

.15%

respectively

and proportion of CO（NH2）2 and gypsum is 1:10.The pouring experiment show that the designed gypsum mould can be suitable for producing the magnesium alloy parts with excellent quality.