Al-10Sr变质剂状态、变质温度及变质时间对ZL114A合金组织的影响

doi:10.13229/j.cnki.jdxbgxb20161298

吉林大学学报(工学版) ›› 2018, Vol. 48 ›› Issue (1): 212-220.doi: 10.13229/j.cnki.jdxbgxb20161298

Al-10Sr变质剂状态、变质温度及变质时间对ZL114A合金组织的影响

赵宇光^{1, 2}, 杨雪慧^{1, 2}, 徐晓峰^{1, 2}, 张阳阳^{1, 2}, 宁玉恒^{1, 2, 3}

1.吉林大学汽车材料教育部重点实验室, 长春 130022;
2. 吉林大学材料科学与工程学院,长春 130022;
3. 大唐东北电力试验研究所有限公司,长春 130012

收稿日期:2016-10-31 出版日期:2018-02-26 发布日期:2018-02-26
作者简介:赵宇光(1955-),男,教授,博士. 研究方向:金属基铸造复合材料,钛合金高温氧化及表面改性.
基金资助:
国家自然科学基金项目(51564005); 吉林省科技发展计划项目(20070506)

Effects of Al-10Sr modifiers with different states, modification temperature and holding time on microstructure of ZL114A alloy

ZHAO Yu-guang^{1, 2}, YANG Xue-hui^{1, 2}, XU Xiao-feng^{1, 2}, ZHANG Yang-yang^{1, 2}, NING Yu-heng^{1, 2, 3}

1. Key Laboratory of Automobile Materials,Ministry of Education,Jilin University,Changchun 130022,China;
2. College of Materials Science and Engineering,Jilin University,Changchun 130022,China;
3. Datang Northeast Electric Power Test & Research Institute,Changchun 130012,China

Received:2016-10-31 Online:2018-02-26 Published:2018-02-26

摘要/Abstract

摘要： 制备了不同处理状态(常规铸态、快速凝固态、轧制变形态)的Al-10Sr中间合金作为变质剂,其中加入Sr的质量分数为0.02%。研究了不同尺寸的Al₄Sr相、变质温度及变质时间对ZL114A显微组织的影响。结果表明:常规铸态、快速凝固态的Al-10Sr变质ZL114A合金在750 ℃分别保温30 min、15 min时获得最佳变质效果,轧制态Al-10Sr变质的ZL114A合金在720 ℃时、保温15 min时共晶硅为珊瑚状,变质效果最好;Al₄Sr的尺寸越小,变质效果越好,而且Al₄Sr的尺寸越小,熔体温度越高,Sr变质的孕育期越短。

关键词: 金属材料, ZL114A合金, 变质, 显微组织

Abstract: Al-10Sr master alloy with different states (conventional as-cast state, rapid-solidified state and rolled state) were prepared as modifiers in the experiments, with 0.02 wt.% of Sr. The effects of the size of Al₄Sr phase, modification temperature and holding time on the microstructure of ZL114A alloy were investigated. Results show that the optimized conditions of ZL114A alloy modified by conventional as-cast and rapid-solidified Al-10Sr master alloy were holding 30 min and 15 min at 750 ℃, respectively. The rolled Al-10Sr made modification treatment has significant effect at 720 ℃ for 15 min, as it caused the eutectic silicon to transform into coral-like. The smaller the size of Al₄Sr phase, the better modification efficiency was obtained. Moreover, the smaller size of Al₄Sr and higher melt temperature resulted in the shorter incubation time.

Key words: metallic materials, ZL114A alloy, modification, microstructure

中图分类号:

TG146.21

赵宇光, 杨雪慧, 徐晓峰, 张阳阳, 宁玉恒. Al-10Sr变质剂状态、变质温度及变质时间对ZL114A合金组织的影响[J]. 吉林大学学报(工学版), 2018, 48(1): 212-220.

ZHAO Yu-guang, YANG Xue-hui, XU Xiao-feng, ZHANG Yang-yang, NING Yu-heng. Effects of Al-10Sr modifiers with different states, modification temperature and holding time on microstructure of ZL114A alloy[J]. 吉林大学学报(工学版), 2018, 48(1): 212-220.

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Al-10Sr变质剂状态、变质温度及变质时间对ZL114A合金组织的影响

Effects of Al-10Sr modifiers with different states, modification temperature and holding time on microstructure of ZL114A alloy

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