马云龙1,陈送义2,3,王习锋2,3,陈康华2,3.淬火水温对2219铝合金锻环组织和力学性能的影响[J].湖南大学学报:自然科学版,2020,(8):118~123
淬火水温对2219铝合金锻环组织和力学性能的影响
Effect of Quenching Water Temperature on Microstructure and Mechanical Property of 2219 Aluminum Alloy Forging Ring
  
DOI:
中文关键词:  铝合金  淬火水温  环锻件  显微组织  机械性能
英文关键词:aluminum alloy  quenching water temperature  ring forging  microstructure  mechanical properties
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作者单位
马云龙1,陈送义2,3,王习锋2,3,陈康华2,3 (1. 北京宇航系统工程研究所北京 100076 2. 中南大学 轻合金研究院湖南 长沙 410083 3. 中南大学 有色金属先进结构材料与制造协同创新中心湖南 长沙 410083) 
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中文摘要:
      采用室温拉伸测试、金相显微镜、扫描电镜以及透射电镜等测试分析方法,研究淬火水温(20~80 ℃)对2219铝合金锻环组织和拉伸性能的影响. 研究结果表明:随着淬火水温提高,锻环的抗拉强度、屈服强度和延伸率先升高后降低. 当淬火水温超过60 ℃时,锻环延伸率各向异性倾向显著增加,其主要原因是形成粗大晶界析出相. 当淬火水温为40 ℃时,锻环具有较好的强度和延伸率,其轴向抗拉强度、屈服强度和延伸率分别为418 MPa、300 MPa和9.3%,径向抗拉强度、屈服强度和延伸率分别为420 MPa、300 MPa和9.8%,切向抗拉强度、屈服强度和延伸率分别为447 MPa、329 MPa和12.6%.
英文摘要:
      The effects of quenching water temperature(20 ~ 80 ℃) on the microstructure and mechanical property of 2219 Al alloy forging ring were studied by room temperature tensile test, optical microscope(OM),scanning electron microscopy(SEM) and transmission electron microscopy(TEM). The results showed that the tensile strength and yield strength first increased and then decreased with the increase of quenching temperature. The elongation anisotropy index of 2219 Al alloy ring forging was significantly increased when the quenching water temperature exceeds 60 ℃ due to the formation of coarse grain boundary precipitates. The high strength and elongation of 2219 Al alloy ring forging was obtained under the quenching water temperature at 40 ℃. The axial tensile strength, yield strength and elongation were 418 MPa,300 MPa and 9.3%, respectively. The radial tensile strength,yield strength and elongation were 420 MPa,300 MPa and 9.8%, respectively. The tangential tensile strength,yield strength and elongation were 447 MPa,329 MPa and 12.6%,respectively.
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