喷射成形AlSi25Cu4Mg耐磨合金的本构方程及热加工图

doi:10.11896/cldb.19050217

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Abstract The hot deformation behavior of a spray formed AlSi25Cu4Mg wear resistant alloy were investigated using Gleeble-3500 test machine at 623—723 K with strain rates from 0.001 s^-1 to 5 s^-1, and the constitutive equation including Zener-Hollomon parameter (Z parameter) and processing map were established. Results revealed that the activation energy of the spray formed high Si content aluminum alloy was 194.8 kJ/mol, the flow stress rises with the decreasing of deformation temperature and the increase of strain rate. Processing map exhibited a high power dissipation degree of 31%, which indicates a high dynamic soften degree when the alloy deformed with low Z parameter values. The spray formed AlSi25Cu4Mg alloy showed an excellent deformation ability during hot extrution with the temperature range of 713—723 K and the strain rate below 1 s^-1. After aging, the tensile strength along extrusion direction of thealloy was 487 MPa. The hardness has reached to 187HV, which satisfies the property requirement.

Key words： spray forming AlSi25Cu4Mg alloy constitutive equation thermal processing map

Published: 26 April 2020

CLC number:

TG146.2

Fund:This work was financially supported by the State Key Laboratory of Air-conditioning Equipment and System Energy Conservation (ACSKL2018KT15), the National Natural Science Foundation Youth Fund of China (51801082), the Provincial Natural Science Foundation of Jiangsu (BK20160560).

Corresponding Authors: Di Fengreceived his Ph.D. degree in materials from Central South University in December 2014. He is currently an associate professor in Jiangsu University of Science and Technology. His research interests are the theoretical and applied research of high performance aluminum alloy.

About author:: Yusheng Hu, male, professor of engineering, focusing on the research of compressor,motor and equipment technology.

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	HU Yusheng
	FENG Di
	ZHOU Jiandang
	ZHU Tian
	ZHANG Hao
	ZHANG Jie
	FAN Xi
	SONG Feidao

Cite this article:

HU Yusheng,FENG Di,ZHOU Jiandang, et al. Constitutive Equation and Thermal Processing Map of Spray Formed AlSi25Cu4Mg Wear Resistant Alloy[J]. Materials Reports, 2020, 34(10): 10120-10125.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.19050217 OR http://www.mater-rep.com/EN/Y2020/V34/I10/10120

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