超声波功率对半连续铸造6013铝合金组织与力学性能的影响
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摘要
采用超声波辅助半连续铸造工艺制备直径310 mm的6013铝合金铸锭,利用金相显微镜、扫描电镜、电子探针分析仪和拉伸试验机,研究了超声波功率对半连续铸造6013铝合金铸锭显微组织与力学性能的影响。结果表明:超声波辅助半连续铸造工艺可以细化铸锭的晶粒和第二相,提高α-Al基体上的元素固溶度。超声波功率越大,铸锭的晶粒和第二相越细小,第二相分布越均匀,α-Al基体中的元素固溶度越高,铸锭的拉伸力学性能越高。当超声波功率增大至350 W时,铸锭的抗拉强度为261. 9 N/mm~2,屈服强度为225. 8 N/mm~2,伸长率为20. 9%,与未施加超声波的铸锭相比,此时铸锭的抗拉强度、屈服强度和伸长率分别提高了10. 7%、13. 6%、14. 8%。
The 6013 aluminum alloy ingot with a diameter of 310 mm was prepared by the semi-continuous casting process with ultrasonic treatment. The effects of ultrasonic power on microstructure and mechanical properties of 6013 aluminum alloy ingot were investigated by metallographic microscope,scanning electron microscope,electron probe microanalyzer and tensile testing machine. The results show that the grains and secondary phase of ingot can be refined by the ultrasonic and the solid solubility of elements in α-Al matrix can be improved.The stronger the ultrasonic power is,the finer the grain and the secondary phase are,the more uniform the distribution of the secondary phase is,the higher the solid solubility of the elements in the α-Al matrix is,the higher the tensile properties of the ingot are. When the ultrasonic power is increased to 350 W,the tensile strength,yield strength and elongation of the ingot are 261. 9 N/mm~2,225. 8 N/mm~2 and 20. 9%,respectively. Compared with the ingot without ultrasonic treatment,the tensile strength,yield strength and elongation of the ingot are increased by 10. 7%,13. 6% and 14. 8%,respectively.
The 6013 aluminum alloy ingot with a diameter of 310 mm was prepared by the semi-continuous casting process with ultrasonic treatment. The effects of ultrasonic power on microstructure and mechanical properties of 6013 aluminum alloy ingot were investigated by metallographic microscope,scanning electron microscope,electron probe microanalyzer and tensile testing machine. The results show that the grains and secondary phase of ingot can be refined by the ultrasonic and the solid solubility of elements in α-Al matrix can be improved.The stronger the ultrasonic power is,the finer the grain and the secondary phase are,the more uniform the distribution of the secondary phase is,the higher the solid solubility of the elements in the α-Al matrix is,the higher the tensile properties of the ingot are. When the ultrasonic power is increased to 350 W,the tensile strength,yield strength and elongation of the ingot are 261. 9 N/mm~2,225. 8 N/mm~2 and 20. 9%,respectively. Compared with the ingot without ultrasonic treatment,the tensile strength,yield strength and elongation of the ingot are increased by 10. 7%,13. 6% and 14. 8%,respectively.
引文
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[11] WANG G,DARGUSCH M S,QIAN M,et al. The role of ultrasonic treatment in refining the as-cast grain structure during the solidification of an Al-2Cu alloy[J]. Journal of Crystal Growth,2014,408:119-124.
[12] ZOUH,PAN Q L,SHI Y J,et al. Effect of ultrasonic field on microstructure and mechanical properties of as-cast 7085 aluminum alloy[J]. Journal of Central South University,2018,25(6):1285-1294.
[2]何新宇.手机机身用铝合金[J].轻合金加工技术,2017,45(6):1-6.
[3]覃锡伯.铝合金圆铸锭工艺问题及对策[J].技术与市场,2013(6):140-141.
[4]彭洪美,李晓谦,蒋日鹏.熔体超声处理对7050铝合金铸锭微观偏析的影响[J].北京理工大学学报,2016,36(11):1105-1110.
[5]钟贞涛,李瑞卿,李晓谦,等.超声处理对2219大规格铝锭微观组织与宏观偏析的影响[J].工程科学学报,2017,39(9):1347-1354.
[6] ESKIN G I. Principles of ultrasonic treatment:application for light alloys melts[J]. Advanced Performance Materials,1997,4(2):223-232.
[7] XU H B,JIAN X G,MEEK T T,HAN Q Y. Degassing of molten aluminum A356 alloy using ultrasonic vibration[J]. Materials Letters,2004,58(29):3669-3673.
[8] ESKIN G I,PIMENOV Y P,MAKAROV G S. Effect of cavitation melt treatment on the structure refinement and property improvement in cast and deformed hypereutectic Al-Si alloys[J]. Materials Science Forum,1997,242:65-70.
[9] TZANAKIS I,LEBON G S B,ESKIN D G,et al. Investigation of the factors influencing cavitation intensity during the ultrasonic treatment of molten aluminium[J]. Materials&Design,2016,90:979–983.
[10] ATAMANENKO T V,ESKIN D G,ZHANG L,et al. Criteria of grain refinement induced by ultrasonic melt treatment of aluminum alloys containing Zr and Ti[J]. Metallurgical and Materials Transactions A,2010,41(8):2056-2066.
[11] WANG G,DARGUSCH M S,QIAN M,et al. The role of ultrasonic treatment in refining the as-cast grain structure during the solidification of an Al-2Cu alloy[J]. Journal of Crystal Growth,2014,408:119-124.
[12] ZOUH,PAN Q L,SHI Y J,et al. Effect of ultrasonic field on microstructure and mechanical properties of as-cast 7085 aluminum alloy[J]. Journal of Central South University,2018,25(6):1285-1294.