韩茜.退火处理对AM80镁合金组织性能的影响[J].有色金属工程,2019,9(9):.
退火处理对AM80镁合金组织性能的影响
Effect of Annealing on Microstructure and Property of AM80 Magnesium Alloy
投稿时间:2019-04-20  修订日期:2019-04-26
DOI:
中文关键词:  AM80镁合金  退火处理  显微组织  力学性能
英文关键词:AM80 magnesium alloy  Annealing treatment  Microstructures  Mechanical properties
基金项目:商洛市科技计划项目(SK2016-29);陕西省教育厅专项科研计划项目(18JK0244)
  
作者单位
韩茜 商洛学院
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中文摘要:
      为了改善AM80镁合金的热处理工艺,利用XRD、OM、SEM、EDS、硬度测试及拉伸试验等方法研究了不同退火工艺对AM80镁合金组织及性能的影响。结果表明:退火处理前后AM80镁合金均由α-Mg基体、Mg17Al12相、MgZn相组成。退火处理后,第二相主要以层片状析出。随着退火温度的升高,第二相完全析出的时间变短,随着退火时间的延长,第二相析出数量增多,直至完全析出。退火处理后,合金硬度、强度及延伸率大部分比铸态高。430℃退火6h后合金硬度为80.11HB,抗拉强度为167.02MPa,延伸率为2.68%,此退火工艺为最佳工艺。退火处理前后合金均为脆性断裂。
英文摘要:
      In order to improve the heat treatment process of AM80 magnesium alloy, the effects of different annealing processes on the microstructure and properties of AM80 magnesium alloy were studied by means of XRD, OM, SEM, EDS, hardness test and tensile test. The results showed that the AM80 magnesium alloy was composed of α-Mg matrix, Mg17Al12 phase and MgZn phase before and after annealing. After annealing treatment, the second phase was mainly separated out in lamellar form. With the increase of annealing temperature, the time for the complete precipitation of the second phase becomes shorter, and with the extension of annealing time, the amount of the second phase precipitation increases until complete precipitation. After annealing treatment, the hardness, strength and elongation of the alloy are higher than that of the as-cast state. After annealing treatment at 430 ℃ for 6 h, the hardness of alloy is 80.11 HB, the tensile strength is 167.02 MPa and the elongation is 2.68%, so this annealing process is the best one. In addition, the alloy was brittle fracture before and after annealing.
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