半固态挤压高硅铝合金二次加热的微观组织演变

doi:10.11896/cldb.201906017

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Abstract The present work aimed to investigate the rule of reheating an extruded high silicon aluminum alloy into semi-solid state, so as to obtain a near globular microstructure. The results showed that reheating power and reheating temperature are two key parameters which affect considerably the reheating process. The increase of heating power can magnify the difference of microstructure for core and edge parts of billets. And with the increase of reheating temperature, the fine and irregular grains grow gradually and spheroidizes. The optimum reheating process parameters suitable for thixoforming were determined to be 7 kW (power) and 530 ℃ (temperature), by analyzing the microstructure for different process. Under this processing condition, the average grain diameter of the resultant specimen experienced reheating was 35.2 μm and the ultimate strength was 418.5 MPa.

Key words： extrusion high-silicon aluminum alloys reheating power reheating temperature

Published: 03 April 2019

CLC number:

TG146.2

Fund:This work was financially supported by the Double First-class Discipline Construction Program of Hunan Province, the Loudi Science and Technology Research Project (2016ZD05).

About author:: Zhiguo Chen received his Doctor of Philosophy in materials science and engineering, Central South University, and the dissertation for Ph.D was performed at Australian Centre for Microscopy and Microanalysis of the University of Sydney, Australia, under the supervision of Professor Simon P. Ringer.

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	CHEN Zhiguo
	FANG Liang
	WU Jiwen
	ZHANG Haichou
	MA Wenjing
	BAI Yuelong

Cite this article:

CHEN Zhiguo,FANG Liang,WU Jiwen, et al. Microstructure Evolution of an Extruded High Silicon Semi-solid State Aluminum Alloys During Reheating[J]. Materials Reports, 2019, 33(6): 1006-1010.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.201906017 OR http://www.mater-rep.com/EN/Y2019/V33/I6/1006

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