Sr+Er复合变质对AlSi10MnMg合金微观组织、导热及力学性能的影响

doi:10.11896/cldb.21090239

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Abstract In this work, AlSi10MnMg was used as the base alloy, and the alloy was subjected to compound modification treatment by adding Sr and Er. The influence of Sr and Er on the microstructure, thermal conductivity and mechanical properties of AlSi10MnMg alloy under different additions was studied, to realize the integration of thermal conductivity and mechanical function of AlSi10MnMg alloy. The results show that the addition of Sr can effectively improve the eutectic Si morphology of the alloy under the metal mold casting process. On this basis, the addition of rare earth element Er can improve the eutectic Si morphology and further refine the eutectic Si. In addition, Sr and Er can refine the secondary dendrite arm spacing of α-Al in the AlSi10MnMg alloy, thereby improving the thermal conductivity and mechanical properties of the alloy. Compared with the unmodified alloy, the secondary dendrite spacing decreased by 67.3%, and the eutectic Si aspect ratio decreased by 46.1%; in terms of performance, the thermal conductivity increased by 17.4% to 179.32 W/(m·K); the wear performance improved 11.2%; tensile strength increased by 34.58% to 221.96 MPa; elongation increased by 104.48% to 15.97%.

Key words： AlSi10MnMg aluminum alloy Sr+Er thermal conductivity mechanical property

Published: Online: 2023-03-27

CLC number:

TG146.2

Fund:Key R & D Program(2018YFB2001800).

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	Articles by authors
	LIU Wenjing
	LI Yuandong
	SONG Zhaoxi
	BI Guangli
	YANG Haokun
	CAO Yangjing

Cite this article:

LIU Wenjing,LI Yuandong,SONG Zhaoxi, et al. Effect of Sr+Er Composite Modification on Microstructure,Thermal Conductivity and Mechanical Properties of AlSi10MnMg Alloy[J]. Materials Reports, 2023, 37(6): 21090239-7.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.21090239 OR http://www.mater-rep.com/EN/Y2023/V37/I6/21090239

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