Al-3P变质Al-18Si合金的显微组织与力学性能

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (1149 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Al-18Si alloy was modified by Al-3P master alloy. The effects of adding amount of alterant w(Al-3P)(0-1.0%) and modification temperature (750-850 ℃) on microstructures and tensile properties of the alloy were investigated by optical microscope (OP), Image Pro Plus 6.0, scanning electron microscopy (SEM) and universal testing machine. The results show that the size of primary Si decreases and its area fraction increases after modification. With the increase of w(Al-3P), the size of primary Si first decreases and then increases, and the area fraction of primary Si first increases and then decreases when Al-18Si alloy was modified at 800 ℃.When the adding amount of alterant w(Al-3P) is 0.6%, the size of primary Si is the smallest, and the average size is 14 μm. When the adding amount of w(Al-3P) is 0.8%, the area fraction of primary Si reaches the maximum of 14.4%. When the adding amount of w(Al-3P) is 0.8%, the area fraction of primary Si in Al-18Si alloy decreases with the increase of modification temperature. The size of primary Si decreases first and then increases. The size of primary Si is the smallest of 15 μm when the alloy is modified at 800 ℃. Compared with unmodified Al-18Si alloy, the tensile strength and elongation of Al-18Si alloy increase by 17.6% and 109% respectively after modified with w(Al-3P)0.8% at 800 ℃. The fracture mode of the modified Al-18Si alloy is ductile fracture.

Key words： hypereutectic Al-Si alloy modification primary Si microstructure mechanical properties

Received: 30 October 2017 Published: 12 July 2019

ZTFLH:

TG292

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	YANG Wei
	LU Xiaowang
	LIU Ya
	WU Changjun
	WANG Jianhua
	SU Xuping

Cite this article:

YANG Wei,LU Xiaowang,LIU Ya, et al. Microstructure and mechanical properties of Al-18Si alloy modified by Al-3P master alloy[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(3): 274-280.

URL:

http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2018/V23/I3/274

[1] 胥锴, 刘徽平, 袁帮谊, 等. 过共晶铝硅合金变质处理的研究进展[J]. 热加工工艺, 2009, 38(3): 32-35.
XU Kai, LIU Huiping, YUAN Bangyi, et al.Research progress of modification on hypereutectic Al-Si alloy[J]. Hot Working Technology, 2009, 38(3): 32-35.
[2] BAO G, ZUO M, LI D, et al.The improvement of microstructures and mechanical properties of near eutectic Al-Si multicomponent alloy by an Al-8Zr-2P master alloy[J]. Materials Science & Engineering A, 2012, 531(5): 55-60.
[3] 孙虎. 过共晶铝硅合金复合变质的研究进展[J]. 科技资讯, 2011(15): 102-103.
SUN Hu.Research progress of combination modification on hypereutectic Al-Si alloy[J]. Science & Technology Information, 2011(15): 102-103.
[4] 赖华清, 范宏训, 徐祥. 过共晶铝硅合金的研究及应用[J]. 汽车工艺与材料, 2001(10): 21-24.
LAI Huaqing, FAN Hongxun, XU Xiang.Research and application of hypereutectic Al-Si alloy[J]. Automobile Techology & Material, 2001(10): 21-24.
[5] 赵红亮, 丁紫阳, 李怀武, 等. Al-P中间合金对过共晶铝硅合金组织及切削性能的影响[J]. 郑州大学学报: 工学版, 2014, 35(5): 109-111.
ZHAO Hongliang, DING Ziyang, LI Huaiwu, et al.Effect of Al-P master mlloy on microstructure and cutting performance of hypereutectic Al-Si alloy[J]. Journal of Zhengzhou University: Engineering Science, 2014, 35(5): 109-111.
[6] 王泽华, 毛协民, 张金龙, 等. Sr-PM复合变质过共晶铝硅合金[J]. 特种铸造及有色合金, 2005, 25(4): 241-243.
WANG Zehua, MAO Xiemin, ZHANG Jinlong, et al.Sr-PM complex modified hypereutectic Al-Si alloy[J]. Special Casting & Nonferrous Alloy, 2005, 25(4): 241-243.
[7] ZUO M, LIU X F, SUN Q Q, et al.Effect of rapid solidification on the microstructure and refining performance of an Al-Si-P master alloy[J]. Journal of Materials Processing Technology, 2009, 209(15/16): 5504-5508.
[8] ZUO M, LIU X, DAI H, et al.Al-Si-P master alloy and its modification and refinement performance on Al-Si alloys[J]. Rare Metals, 2009, 28(4): 412-417.
[9] 张瑜, 王宇鑫, 廖文俊, 等. 稀土元素对过共晶铝硅合金的变质机理[J]. 金属功能材料, 2010, 17(3): 86-90.
ZHANG Yu, WANG Yuxin, LIAO Wenjun, et al.Modification mechanism of RE on hypereutectic Al-Si alloy[J]. Metallic Functional Materials, 2010, 17(3): 86-90.
[10] ZUO M, ZHAO D, WANG Z, et al.Complex modification of hypereutectic Al-Si alloy by a new Al-Y-P master alloy[J]. Metals & Materials International, 2015, 21(4): 646-651.
[11] CHEN CHONG, LIUZHONGXIA, RENBO.Influences of complex modification of P and RE on microstructure and mechanical properties of hypereutectic Al-20Si alloy[J]. Transactions of Nonferrous Metals Society of China, 2007, 17(2): 301-306.
[12] 徐国庆, 纪坤, 金云学. Al-P-RE-Sr复合变质过共晶铝硅合金[J]. 热加工工艺, 2008, 37(2): 48-51.
XU Guoqing, JI Kun, JIN Yunxue.Al-P-RE-Sr combination modification of Al-30%Si alloy[J]. Hot Working Technology, 2008, 37(2): 48-51.
[13] JIANG Q C, XU C L, LU M, et al.Effect of new Al-P-Ti-TiC-Y modifier on primary silicon in hypereutectic Al-Si alloys[J]. Materials Letters, 2005, 59(6): 624-628.
[14] XU C L, JIANG Q C.Morphologies of primary silicon in hypereutectic Al-Si alloys with melt overheating temperature and cooling rate[J]. Materials Science and Engineering A, 2006. 437(2): 451-455.
[15] 刘靓, 李凯良, 刘亚, 等. Al-5Ti-B对过共晶Al-18Si合金的变质效果[J]. 粉末冶金材料科学与工程, 2016, 21(1): 59-64.
LIU Liang, LI Kailaing, LIU Ya, et al.Effect of Al-5Ti-B alloy on hypereutectic Al-18Si alloy modification[J]. Materials Science and Engineering of Powder Metallurgy, 2016, 21(1): 59-64.
[16] 阴瑜娟, 赵玉厚, 夏永喜. 原位生成铝基复合材料增强相的研究现状[J]. 热加工工艺, 2006, 35(17): 70-73.
YIN Yujuan, ZHAO Yuhou, XIA Yongxi.Study status of strengthening phase of in-situ aluminum matrix composites[J]. Hot Working Technology, 2006, 35(17): 70-73.