Preparation of Al-30Si Semi-solid Slurry by Low Superheat Pouring with Weak Intensity Electromagnetic Stirring and Its Properties

Zhang Weijun; Fan Gang; Wei Chang; Zhang Jiatao

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Preparation of Al-30Si Semi-solid Slurry by Low Superheat Pouring with Weak Intensity Electromagnetic Stirring and Its Properties
Issue 9, Pages: 687-690(2008)
Published： 2008 ，
DOI：

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[1]张维钧,樊刚,魏昶,张家涛.电磁搅拌制备半固态Al-30Si浆料及其性能研究[J].特种铸造及有色合金,2008(09):687-690+653.

Zhang Weijun, Fan Gang, Wei Chang, et al. Preparation of Al-30Si Semi-solid Slurry by Low Superheat Pouring with Weak Intensity Electromagnetic Stirring and Its Properties. [J]. Special Casting & Nonferrous Alloys (9):687-690(2008)
[1]张维钧,樊刚,魏昶,张家涛.电磁搅拌制备半固态Al-30Si浆料及其性能研究[J].特种铸造及有色合金,2008(09):687-690+653. DOI：

Zhang Weijun, Fan Gang, Wei Chang, et al. Preparation of Al-30Si Semi-solid Slurry by Low Superheat Pouring with Weak Intensity Electromagnetic Stirring and Its Properties. [J]. Special Casting & Nonferrous Alloys (9):687-690(2008) DOI：

摘要

采用低过热度弱电磁搅拌方法制备了Al-30Si半固态浆料

分析了浇注温度、搅拌功率、搅拌时间等参数对试样硬度、耐磨性能和热稳定性能的影响。研究结果表明

低过热度浇注弱电磁搅拌方法可提高Al-30Si浆料的综合使用性能

与常规铸造相比

布氏硬度提高了74.95%

磨损量减小了近1个数量级

在20～300℃有效温度范围内的热膨胀系数减小了22.16%;浇注温度、搅拌功率、搅拌时间对半固态浆料试样性能有影响

浇注温度的影响最为明显

搅拌功率和搅拌时间的影响相对较小。

Abstract

Hypereutectic Al-30Si alloy semi-solid slurry was prepared by low superheat pouring with weak intensity electromagnetic stirring. Effects of pouring temperature

stirring power and time on micro-hardness

wear resistance and thermal stability of samples were analyzed. The results indicate that compared with those of slurry prepared by conventional casting

comprehensive properties of Al-30Si slurry prepared by low superheat pouring with weak intensity electromagnetic stirring are obviously improved

and hardness is increased by 74.95 and wear resistance is increased by more than 10 times and thermal expansion coefficient is decreased by 22.16% in range of 20～300 ℃. The processing parameters influencing properties of semi-solid slurry samples are as follows: pouring temperature

stirring power and stirring time.