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

• Orginal Article • Previous Articles     Next Articles

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

ZHAO Yu-guang1, 2, YANG Xue-hui1, 2, XU Xiao-feng1, 2, ZHANG Yang-yang1, 2, NING Yu-heng1, 2, 3   

  1. 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

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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

CLC Number: 

  • TG146.21
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