Preparation of A319 Semi-solid Slurry by Internal Cooling Process

Xu Pengpeng; Wang Liandeng; Chen Xiao; Zhang Yu; Cao Haichun

doi:10.15980/j.tzzz.2016.01.011

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Preparation of A319 Semi-solid Slurry by Internal Cooling Process
Vol. 36, Issue 1, Pages: 40-44(2016)
Published： 2016 ，
DOI： 10.15980/j.tzzz.2016.01.011

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[1]许朋朋,王连登,陈晓,张宇,曹海春.内冷式搅拌法制备A319半固态浆料工艺研究[J].特种铸造及有色合金,2016,36(01):40-44.

Xu Pengpeng, Wang Liandeng, Chen Xiao, et al. Preparation of A319 Semi-solid Slurry by Internal Cooling Process. [J]. Special Casting & Nonferrous Alloys 36(1):40-44(2016)
[1]许朋朋,王连登,陈晓,张宇,曹海春.内冷式搅拌法制备A319半固态浆料工艺研究[J].特种铸造及有色合金,2016,36(01):40-44. DOI： 10.15980/j.tzzz.2016.01.011.

Xu Pengpeng, Wang Liandeng, Chen Xiao, et al. Preparation of A319 Semi-solid Slurry by Internal Cooling Process. [J]. Special Casting & Nonferrous Alloys 36(1):40-44(2016) DOI： 10.15980/j.tzzz.2016.01.011.

摘要

采用内冷式搅拌法制备了A319铝合金半固态浆料

研究了内冷块与铝合金液质量比、铝合金液温度、搅拌速度等工艺参数对半固态浆料显微组织的影响

分析了内冷式搅拌过程中半固态浆料的形成机理。结果表明

在内冷块与铝合金液质量比为5%、铝合金液温度为625℃、搅拌速度为1 100r/min时

可以制备出组织良好的半固态浆料

其中初生α-Al相平均晶粒尺寸和形状因子分别达到了59.7μm和0.74。提高内冷搅拌速度不仅能提高初生α-Al相的圆整度

还具有晶粒细化效应。

Abstract

The semi-solid slurry of A319 aluminum alloy was prepared by internal cooling process.Effects of parameters

such as the mass ratio of internal cooling block to aluminum melt

the temperature of aluminum melt and the stirring speed

on the microstructure of semi-solid slurry were investigated.The forming mechanism of semi-solid slurry prepared by the internal cooling process was described.The results indicate that desirable globular primaryα-Al can be produced when the mass ratio of internal cooling block to aluminum melt is 5% with temperature of aluminum melt of 625 ℃ and stirring speed of1 100r/min

where the average diameter and shape factor of the primaryα-Al particles reach 59.7μm and 0.74

respectively.Roundness of the primary particles and grain refinement effects can be improved with the increase of stirring speed.