热处理对IT产品用高纯6463铝合金组织和力学性能的影响
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摘要
采用显微硬度计、拉伸试验机、扫描电子显微镜等仪器对IT产品用高纯6463铝合金的组织和性能进行检测,研究了该合金在不同热处理工艺下的显微组织与力学性能。结果表明:随着固溶温度的升高和保温时间的延长,合金的强度和硬度呈先升高后降低的趋势。在530℃/20 min工艺下,合金的强度和硬度最高,其维氏硬度达到45 HV,抗拉强度达到135 MPa,合金的断裂方式为韧性断裂,伸长率为27%,合金的晶粒尺寸约为90～105μm。合金的最佳时效温度为170～175℃,时间为10～12 h,其维氏硬度达到87～89 HV,抗拉强度达到235～239 MPa。在对IT产品用6463高纯铝合金的硬度和强度有较高要求时,不宜采用200℃/2 h的时效工艺进行工业化生产。
The microhardness tester, tensile tester and scanning electron microscope were used to detect the microstructure and properties of high purity 6463 aluminum alloy used in IT products. The microstructure and mechanical properties of the alloy under different heat treatment conditions were studied. The results show that, the strength and hardness of the alloy increase first and then decrease with the increase of the solution temperature and the prolongation of the holding time. The strength and hardness of the alloy are the highest at 530 ℃/20 min. The Vickers hardness and tensile strength of the alloy reach 45 HV and 135 MPa, respectively. The fracture mode of the alloy is ductile and the elongation is 27%. The grain size of the alloy is about 90-105 μm. The optimum aging temperature of the alloy is 170-175 ℃ and the time is 10-12 h. The Vickers hardness of the alloy reaches 87-89 HV and the tensile strength of the alloy reaches 235-239 MPa. When high hardness and strength of 6463 high purity aluminum alloy used in IT products are required, it is not suitable to use the aging process of 200 ℃/2 h for industrial production.
The microhardness tester, tensile tester and scanning electron microscope were used to detect the microstructure and properties of high purity 6463 aluminum alloy used in IT products. The microstructure and mechanical properties of the alloy under different heat treatment conditions were studied. The results show that, the strength and hardness of the alloy increase first and then decrease with the increase of the solution temperature and the prolongation of the holding time. The strength and hardness of the alloy are the highest at 530 ℃/20 min. The Vickers hardness and tensile strength of the alloy reach 45 HV and 135 MPa, respectively. The fracture mode of the alloy is ductile and the elongation is 27%. The grain size of the alloy is about 90-105 μm. The optimum aging temperature of the alloy is 170-175 ℃ and the time is 10-12 h. The Vickers hardness of the alloy reaches 87-89 HV and the tensile strength of the alloy reaches 235-239 MPa. When high hardness and strength of 6463 high purity aluminum alloy used in IT products are required, it is not suitable to use the aging process of 200 ℃/2 h for industrial production.
引文
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[4]王孟君,王金亮.6063铝合金时效工艺的研究[J].金属热处理,1998,1(8):24-25.
[5]江涛,沈健,闫晓东,等.固溶工艺对6061铝合金硬质阳极氧化膜层质量的影响[J].稀有金属,2011,35(2):184-188.
[6]陈朝轶,张鹏,刘静,等.6063铝合金阳极氧化膜腐蚀行为研究[J].热加工工艺,2013,42(16):38-40.
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[8]柯彬.Mn对6061铝合金组织与力学性能的影响[D].长沙:中南大学,2013.
[9]周志乐.Cr及热处理工艺对6463合金组织与性能的影响[D].长沙:中南大学,2013.
[10]李冲.铝合金中Mg2Si相演变行为及析出长大机制的研究[D].济南:山东大学,2012.
[11]商宝川.6082和6061铝合金固溶-时效制度及淬透性研究[D].长沙:中南大学,2011.
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[13]李科,甘卫平,陈铁平,等.热处理工艺对6063铝合金组织和力学性能的影响[J].铝加工,2005(2):1-4.