铸造静置温度对Mg-6Al-2Sn铸态镁合金组织及性能的影响
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摘要
采用不同的静置温度对Mg-6Al-2Sn铸态镁合金进行了试验,并进行了显微组织和力学性能的测试与分析。结果表明:随静置温度从650℃升高至770℃,试样的平均晶粒尺寸先减小后增大,抗拉强度和屈服强度先增大后减小,断后伸长率变化不大;与650℃静置温度处理时相比,710℃静置处理时的Mg-6Al-2Sn铸态镁合金的平均晶粒尺寸减小了55μm(167→112μm),抗拉强度和屈服强度分别增大了35 MPa(173→208MPa)和18 MPa(124→142MPa)。Mg-6Al-2Sn铸态镁合金的静置温度优选为710℃。
The as-cast Mg-6Al-2Sn magnesium alloy was tested at different static temperatures. The microstructure and mechanical properties were tested and analyzed. The results show that with the increase of the static temperature from 650℃to 770℃, the average grain size of the sample decreases firstly and then increases, the tensile strength and yield strength firstly increase and then decrease, and the elongation after break does not change much. Compared with that of the alloy cast with 650℃ static temperature treatment, the average grain size of as-cast Mg-6Al-2Sn magnesium alloy cast with 710℃ decreases by 55 μm at(167→112 μm), and the tensile strength and yield strength increase by 35 MPa(173→208 MPa) and 18 MPa(124→142 MPa), respectively. The optimum static temperature of Mg-6Al-2Sn cast magnesium alloy is 710℃.
The as-cast Mg-6Al-2Sn magnesium alloy was tested at different static temperatures. The microstructure and mechanical properties were tested and analyzed. The results show that with the increase of the static temperature from 650℃to 770℃, the average grain size of the sample decreases firstly and then increases, the tensile strength and yield strength firstly increase and then decrease, and the elongation after break does not change much. Compared with that of the alloy cast with 650℃ static temperature treatment, the average grain size of as-cast Mg-6Al-2Sn magnesium alloy cast with 710℃ decreases by 55 μm at(167→112 μm), and the tensile strength and yield strength increase by 35 MPa(173→208 MPa) and 18 MPa(124→142 MPa), respectively. The optimum static temperature of Mg-6Al-2Sn cast magnesium alloy is 710℃.
引文
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[2]乐启炽,欧鹏,崔建忠,等.镁合金半固态制浆新工艺[J].东北大学学报(自然科学版),2002(4):371-374.
[3]赵伦,刘建睿,黄卫东.粗镁直接熔制高品质AZ91D镁合金研究[J].特种铸造及有色合金,2009(4):317-319.
[4]任峻,马颖.熔体静置处理对Al-Ti-B-RE细化剂组织和性能的影响[J].铸造技术,2009(12):1556-1558.
[5]刘奎立,张治民,杨宝付,等.镁合金的成形技术及其应用研究[J].锻压技术,2004,29(5):5-8.
[6]叶俊华,汤爱涛,马仕达,等.搅拌摩擦焊接Mg-6Al-1Sn合金组织与性能研究[J].材料导报,2017(22):79-84.
[7]穆桐,孙镇,邓子玉,等.Mn对Mg-5Sn-2Al-Zn合金组织及力学性能的影响[J].沈阳理工大学学报,2017(3):27-31.
[8]范晓伟,张丁非,冯靖凯,等.挤压温度对AZT802镁合金组织和性能的影响[J].材料导报,2017(22):95-99.
[9]姚志英.AZ31B镁合金半固态挤压试验研究[J].热加工工艺,2012,41(23):52-54.
[10]张莹,耿茂鹏,饶磊,等.镁合金半固态双辊板带流变成形研究[J].铸造技术,2005(8):706-708.