Rheologic Forming Theory of Semi-solid Alloy Part I: Rheologic Filling Theory

Xing Shuming~1; Tan Jianbo~1; Zhang Haiying~2; Zhang Lizhong~1; Bao Peiwei~2

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Rheologic Forming Theory of Semi-solid Alloy Part I: Rheologic Filling Theory
Issue 3, Pages: 161-165(2006)
Published： 2006 ，
DOI：

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[1]邢书明,谭建波,张海英,张励忠,鲍培玮.半固态合金流变成型工艺理论——第1部分流变充型理论[J].特种铸造及有色合金,2006(03):161-165+127.

Xing Shuming~1, Tan Jianbo~1, Zhang Haiying~2, et al. Rheologic Forming Theory of Semi-solid Alloy Part I: Rheologic Filling Theory. [J]. Special Casting & Nonferrous Alloys (3):161-165(2006)
[1]邢书明,谭建波,张海英,张励忠,鲍培玮.半固态合金流变成型工艺理论——第1部分流变充型理论[J].特种铸造及有色合金,2006(03):161-165+127. DOI：

Xing Shuming~1, Tan Jianbo~1, Zhang Haiying~2, et al. Rheologic Forming Theory of Semi-solid Alloy Part I: Rheologic Filling Theory. [J]. Special Casting & Nonferrous Alloys (3):161-165(2006) DOI：

摘要

半固态合金熔体直接浇入储料腔后

在压力作用下依靠自身特有的流变性

依次通过直浇道、横浇道和内浇道

逐步充填工件型腔的过程称为半固态合金熔体流变充型。流变充型的微观过程包括其中液相的主动流变和固相的被动流变

可能出现均匀流变充型和分离流变充型两种形式

当型腔压力Pm大于粘滞力τ时

将出现分离流变。理论分析了流变充型阻力的来源和定量计算公式

发现最大充型长度取决于模具（或铸型）的冷却能力、半固态熔体自身的微观结构和流变特性

以及成型工艺参数

给出了螺旋线型腔最大充型长度的估算公式。

Abstract

Rheologic filling of semi-solid alloy melt is defined as a process in which the semi-solid slurry poured into a die chamber is pressed into a mold cavity through a filling system including three basic units such as sprue

runner and ingate by means of the rheologic properties of semi-solid alloys. The filling process is composed of active rheology and passive rheology

possibly forming uniform filling and discretely filling. The discretely filling phenomen were observed with the pressure Pm in cavity more than cohesive force τ acted on the solid. Maximum filling length is dependent on cooling capacity of mould

microstructure and reheology of semi-solid slurry through theoretical analysis of origination of rheologic filling resistance and quantitative calculation equation. The evaluation equation for maximum filling length in gyroidal mold was given.