Design of Rational Pouring Scheme to Avoid Hot Tear and Deformation in Castings-the Second Series of Lectures on Design of Investment Casting Scheme

Xu Yunxiang

Views : 0 下载量: 336 CSCD: 9

Export
Share
Collection
Album

Design of Rational Pouring Scheme to Avoid Hot Tear and Deformation in Castings-the Second Series of Lectures on Design of Investment Casting Scheme
Issue 5, Pages: 42-45(2003)
Published： 2003 ，
DOI：

扫描看全文

[1]许云祥.设计合理的浇注方案以避免铸件热裂和变形——熔模铸件铸造方案设计系列讲座之二[J].特种铸造及有色合金,2003(05):42-45+67.

Xu Yunxiang. Design of Rational Pouring Scheme to Avoid Hot Tear and Deformation in Castings-the Second Series of Lectures on Design of Investment Casting Scheme. [J]. Special Casting & Nonferrous Alloys (5):42-45(2003)
[1]许云祥.设计合理的浇注方案以避免铸件热裂和变形——熔模铸件铸造方案设计系列讲座之二[J].特种铸造及有色合金,2003(05):42-45+67. DOI：

Xu Yunxiang. Design of Rational Pouring Scheme to Avoid Hot Tear and Deformation in Castings-the Second Series of Lectures on Design of Investment Casting Scheme. [J]. Special Casting & Nonferrous Alloys (5):42-45(2003) DOI：

摘要

为避免产生热裂应适当降低浇注温度

提高型壳温度。在浇注系统设计时

避免金属液冲击型腔

避免铸件直浇道横浇道形成框形结构等也是避免热裂的有效措施。防止铸件变形的措施有 :减缓铸件薄壁部位的冷却速度 ;改变蜡模组装方向

克服因重力产生的变形 ;尽量设置单个内浇道 ;增设防变形工艺肋 ;采用反变形和变形转移措施等。

Abstract

Proper decrease in pouring temperature and increase in shell mold temperature are helpful to preventing hot tear. Some effective measures to prevent hot tear

including avoidance of liquid metal to impact mold cavity and of casting-sprue-runner to form rectangular structure

were proposed during design of gating system. The measures to prevent casting deformation is shown as follows: decreasing cooling rate of thin-walled location in casting

changing assembly direction of wax pattern to overcome the deformation owning to the gravity

possibly setting single ingate

adding reinforced rib

using reverse deflection and deformation transfer.