Abstract: The heat treatment of the copper alloy has a significant effect on the improvement and promotion of its performance, and the influence of the preparation process of the semi-solid copper alloy slurry on the microstructure and mechanical properties cannot be ignored.This work studies the microstructure, element distribution, tensile performance, fracture analysis, brinell hardness of the semi-solid extruded copper alloy at four remelting temperatures of 890 ℃, 910 ℃, 930 ℃ and 950 ℃ for 15 min. The results show that with the increase of remelting temperature, the average grain diameter increases at first and then decreases, that the liquid phase ratio increases from 12.7% to 19.2%, that the shape factor decreases at first and then increases, that the tensile strength decreases and that the elongation increases gradually. Tensile fracture gradually changes from brittle fracture to mixed mode of cleavage fracture and ductile fracture. Fracture surface changes from flat and smooth to river pattern, cleavage platform and a small number of dimples. Brinell hardness increases at first and then decreases gradually. When remelting temperature is 910 ℃, Brinell hardness reaches the maximum value of 126HBW.
1 Spencer D B, Mehrabian R, Flemings M C. Metallurgical and Materials Transactions B, 1972, 3, 1925. 2 Flemings M C. Metallurgical Transactions B, 1991, 22, 957. 3 Binesh B, Aghaie-Khafri M. Metals, 2016, 6(3), 42. 4 Chen G, Zhang Y M, Du Z M. Transactions of Nonferrous Metals Society of China, 2016, 26(3), 643. 5 Huang S, Wang C, He K, et al. Philosophical Magazine Letters, 2019, 99(12), 444. 6 Meengam C, Dunyakul Y, Maunkhaw D, et al. Metals, 2018, 8(8), 637. 7 Sheykh-Jaberi F, Cockcroft S L, Maijer D M, et al. Journal of Materials Processing Technology, 2019, 266, 37. 8 Elgallad E M, Chen X G. Materials Science and Engineering A, 2012, 556, 783. 9 Campo K N, De Freitas C C, Moon S C, et al. Materials Characterization, 2018, 145, 10. 10 Chen Y N, Huo Y Z, Zhao Y P, et al. Rare Metal Materials and Engineering, 2016, 45(6), 1406 (in Chinese). 陈永楠, 霍亚洲, 赵祎平, 等. 稀有金属材料与工程, 2016, 45(6), 1406. 11 Chen Y N, Luo C, Wang J, et al. High Temperature Materials and Processes, 2016, 35(1), 29. 12 Chen Y N, Luo C, Huo Y Z, et al. Advances in Mechanical Engineering, DOI:10.1177/1687814015587428. 13 Guo H M, Wang C, Wen F M, et al. The Chinese Journal of Nonferrous Metals, 2016, 26(10), 2110 (in Chinese). 郭洪民, 王 程, 温飞马, 等. 中国有色金属学报, 2016, 26(10), 2110. 14 Wang Y, Hu M L, Xu Hong Y, et al. Modern Physics Letters B, 2020, 34(33), 2050385. 15 Lee B S, Joo D H, Kim M H. Materials Science and Engineering A, 2005, 402(1),170. 16 Neag A, Favier V, Bigot R, et al. Journal of Materials Processing Techno-logy, 2012, 212(7), 1472. 17 Li Y k, Li Lu, Geng B Y, et al. Materials Characterization, 2021, 172, 110898. 18 Cao M, Wang Z, Zhang Q. Journal of Alloys and Compounds, 2017, 715, 413. 19 Ferrante M, De Freitas E R. Acta Materialia, 2001, 49(18), 3839. 20 Ferrante M, De Freitas E R. Materials Science and Engineering A, 1999, 271(1), 172. 21 Lee B S, Joo D H, Kim M H. Journal of Materials Processing Technology, 2008, 198(1), 366.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2022, Vol. 36 
