Elimination Measures of Shrinkage Holes and Surface Burr in Investment Castings

Lü Yuyang; Lü Cunchang; Zhao Kai; Lü Jinghua; Li Weilong

doi:10.15980/j.tzzz.2020.07.016

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Elimination Measures of Shrinkage Holes and Surface Burr in Investment Castings
Vol. 40, Issue 7, Pages: 767-769(2020)
Published： 2020 ，
DOI： 10.15980/j.tzzz.2020.07.016

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[1]吕宇阳,吕存昌,赵凯,吕景华,李伟隆.熔模铸件的缩孔及表面毛刺缺陷防治方法[J].特种铸造及有色合金,2020,40(07):767-769.

Lü Yuyang, Lü Cunchang, Zhao Kai, et al. Elimination Measures of Shrinkage Holes and Surface Burr in Investment Castings. [J]. Special Casting & Nonferrous Alloys 40(7):767-769(2020)
[1]吕宇阳,吕存昌,赵凯,吕景华,李伟隆.熔模铸件的缩孔及表面毛刺缺陷防治方法[J].特种铸造及有色合金,2020,40(07):767-769. DOI： 10.15980/j.tzzz.2020.07.016.

Lü Yuyang, Lü Cunchang, Zhao Kai, et al. Elimination Measures of Shrinkage Holes and Surface Burr in Investment Castings. [J]. Special Casting & Nonferrous Alloys 40(7):767-769(2020) DOI： 10.15980/j.tzzz.2020.07.016.

摘要

熔模铸件经常会遇到孤立热节

在热节部位很容易出现缩孔。一般可通过改变组树工艺

也可以通过改变浇注温度和焙烧温度来解决

有时还需要改变铸件的结构。对于铸件表面毛刺

在试验过程中发现

优化影响铸件表面毛刺的部分工艺参数

取得了很好的效果。

Abstract

In investment casting production

castings with isolated hot spot are often encountered.In general

some problems can be solved by changing assemble-tree design or changing the structure design of castings.The kind of defect can also be eliminated or improved by changing pouring temperature and baking temperature.Some technological parameters affecting the surface burr of castings were presented in the experiment.After more than three years of production verification

the effect was satisfactory.