球磨时间及热处理工艺对6061铝合金组织与性能的影响
Effect of ball milling time and heat treatment on microstructure and properties of 6061aluminum alloy
查看参考文献29篇
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文摘
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采用粉末冶金法制备6061铝合金,利用光学显微镜、扫描电镜、透射电镜及硬度测试、拉伸测试等方法,研究了球磨时间和挤压态合金固溶时效处理对材料微观组织和力学性能的影响。结果表明:随着球磨时间的延长,粉末形貌由球形逐渐变为扁平片状,并且粉末粒径逐渐增大。球磨2h时,烧结态合金具有较好的致密度和综合力学性能,但较长的球磨时间将导致材料致密度和力学性能降低。烧结态合金经过热挤压后较优的固溶时效工艺为530℃×1h+180℃× 8h,此时合金中析出弥散分布且细小的β″相,合金具有较高的强度(442MPa)和硬度(125HV)以及合适的伸长率。其优良的力学性能主要是由弥散强化、细晶强化、固溶强化共同作用的结果。 |
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其他语种文摘
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The 6061aluminum alloy was prepared by powder metallurgy method,and the effects of ball milling time and solution-aging treatment on microstructure and mechanical properties of the extruded alloy were studied by means of optical microscopy,scanning electron microscopy,transmission electron microscopy,hardness test and tensile test,etc.The results show that with the prolongation of the ball milling time,the powder morphology gradually changes from spherical to flat sheet,and the powder particle size gradually increases.The sintered alloy has better density and comprehensive mechanical properties when milling for 2h,but longer milling time will lead to the decrease of density and mechanical properties of the material.The better solution-aging process of sintered alloy after hot extrusion is 530℃×1h+180℃×8h,at which time the alloy precipitates a diffuse distribution and a fineβ″phase,and the alloy has high strength(442MPa)and hardness(125HV),as well as suitable elongation.Its excellent mechanical properties are mainly the result of the combination of dispersion strengthening,fine grain strengthening and solid solution strengthening. |
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来源
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材料工程
,2023,51(10):136-145 【核心库】
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DOI
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10.11868/j.issn.1001-4381.2022.000761
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关键词
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粉末冶金
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6061铝合金
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球磨时间
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热处理
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微观组织
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力学性能
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地址
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郑州航空工业管理学院材料学院, 郑州, 450046
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-4381 |
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学科
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金属学与金属工艺 |
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基金
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河南省科技研发项目
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文献收藏号
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CSCD:7579872
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