铸锭枝晶间距和冷变形量对Cu-15Ni-8Sn合金显微组织和硬度的影响
|
摘要
采用中频感应炉与高频感应炉制备了枝晶间距分别为11,18,23,50μm的Cu-15Ni-8Sn合金铸锭,并依次进行了均匀化退火处理、固溶处理、冷变形和时效处理,研究了铸锭枝晶间距和冷变形量对合金显微组织和硬度的影响。结果表明:试验合金铸锭的显微组织均为明显的树枝状组织;经均匀化退火及固溶处理后,铸锭枝晶间距越小的合金组织也越趋于均匀;冷变形量越大,合金中的晶粒变形越严重,且经400℃时效后合金中的黑色不连续脱溶产物越早析出,时效硬度峰也越早出现;在相同的冷变形量下,铸锭枝晶间距越小的合金中黑色不连续脱溶产物越晚析出,且时效硬度峰越晚出现。
Cu-15 Ni-8 Sn alloy ingots with dendrite spacing of 11,18,23,50 mm,respectively,were prepared by intermediate frequency induction furnace and high frequency induction furnace, and then treated in the order of homogenization annealing,solid solution,cold deformation and aging. The effects of dendrite spacing of the ingot and cold deformation amount on the microstructure and hardness of the alloy were studied. The results show that the microstructures of the tested alloy ingots were obvious dendritic structures. After homogenization annealing and solid solution, the microstructure of the alloy with relatively small ingot dendrite spacing was relatively uniform. The deformation of grains in the alloy was relatively large with a relatively large cold deformation amount, furthermore the black discontinuous precipitates and the aging hardness peak appeared earlier after aging at 400 ℃. With the same cold deformation amount,the black discontinuous precipitates and the aging hardness peak appeared later in the alloy with relatively small ingot dendrite spacing.
Cu-15 Ni-8 Sn alloy ingots with dendrite spacing of 11,18,23,50 mm,respectively,were prepared by intermediate frequency induction furnace and high frequency induction furnace, and then treated in the order of homogenization annealing,solid solution,cold deformation and aging. The effects of dendrite spacing of the ingot and cold deformation amount on the microstructure and hardness of the alloy were studied. The results show that the microstructures of the tested alloy ingots were obvious dendritic structures. After homogenization annealing and solid solution, the microstructure of the alloy with relatively small ingot dendrite spacing was relatively uniform. The deformation of grains in the alloy was relatively large with a relatively large cold deformation amount, furthermore the black discontinuous precipitates and the aging hardness peak appeared earlier after aging at 400 ℃. With the same cold deformation amount,the black discontinuous precipitates and the aging hardness peak appeared later in the alloy with relatively small ingot dendrite spacing.
引文
[1]王军,殷俊林,严彪.Cu-Ni-Sn合金的发展和应用[J].上海有色金属,2004,25(4):184-187.
[2]唐人剑,王军,殷俊林,等.新型弹性合金研究[J].材料导报,2005,19(1):54-55.
[3]刘宇轩,吴伟,陈强,等.铸态和时效态Cu-15Ni-8Sn合金的摩擦磨损性能[J].机械工程材料,2015,39(7):73-76.
[4]王艳辉,汪明朴,洪斌.Cu-15Ni-8Sn-0.4Si合金时效过程研究[J].机械工程材料,2003,27(11):15-17.
[5]刘洋,罗远辉,王力军.Cu-15Ni-8Sn弹性合金的研究及发展趋势[J].金属功能材料,2013,20(2):52-56.
[6]郑史烈,吴年强,曾跃武,等.高弹性导电合金Cu-Ni-Sn的研究现状[J].材料科学与工程,1997,15(3):61-65.
[7]KONDO S I,MASUSAKI A,OGAWA K,et al.Effects of initial states on the spinodal decomposition of quenched and melt-spun Cu-15Ni-8Sn alloy[J].Materials Transactions,2014,56(1):23-29.
[8]张乾向,李成栋,安宁,等.喷射成形Cu-15Ni-8Sn合金的显微组织和性能研究[J].稀有金属,2010,34(增刊1):1-4.
[9]张少宗,江伯鸿,丁文江.铸造Cu-15Ni-8Sn合金的组织和力学性能[J].特种铸造及有色合金,2006,26(1):62-64.
[10]王艳辉,汪明朴,洪斌.Cu-15Ni-8Sn合金的调幅相结构[J].功能材料,2004,35(增刊1):3405-3408.
[11]SCHWARTZ L H,MAHAJAN S,PLEWES J T.Spinodal decomposition in a Cu-9wt%Ni-6wt%Sn alloy[J].Acta Metallurgica,1974,22(5):601-609.
[12]PLEWES J T.Spinodal Cu-Ni-Sn alloys are strong and superductile[J].Metal Progress,1974,106(7):46-48.
[13]张利衡.添加Mn和Cr对Cu-9Ni-6Sn合金组织与性能的影响[J].上海有色金属,2003,24(3):112-119.
[14]崔忠圻,刘北兴.金属学与热处理原理[M].2版.哈尔滨:哈尔滨工业大学,2004.
[2]唐人剑,王军,殷俊林,等.新型弹性合金研究[J].材料导报,2005,19(1):54-55.
[3]刘宇轩,吴伟,陈强,等.铸态和时效态Cu-15Ni-8Sn合金的摩擦磨损性能[J].机械工程材料,2015,39(7):73-76.
[4]王艳辉,汪明朴,洪斌.Cu-15Ni-8Sn-0.4Si合金时效过程研究[J].机械工程材料,2003,27(11):15-17.
[5]刘洋,罗远辉,王力军.Cu-15Ni-8Sn弹性合金的研究及发展趋势[J].金属功能材料,2013,20(2):52-56.
[6]郑史烈,吴年强,曾跃武,等.高弹性导电合金Cu-Ni-Sn的研究现状[J].材料科学与工程,1997,15(3):61-65.
[7]KONDO S I,MASUSAKI A,OGAWA K,et al.Effects of initial states on the spinodal decomposition of quenched and melt-spun Cu-15Ni-8Sn alloy[J].Materials Transactions,2014,56(1):23-29.
[8]张乾向,李成栋,安宁,等.喷射成形Cu-15Ni-8Sn合金的显微组织和性能研究[J].稀有金属,2010,34(增刊1):1-4.
[9]张少宗,江伯鸿,丁文江.铸造Cu-15Ni-8Sn合金的组织和力学性能[J].特种铸造及有色合金,2006,26(1):62-64.
[10]王艳辉,汪明朴,洪斌.Cu-15Ni-8Sn合金的调幅相结构[J].功能材料,2004,35(增刊1):3405-3408.
[11]SCHWARTZ L H,MAHAJAN S,PLEWES J T.Spinodal decomposition in a Cu-9wt%Ni-6wt%Sn alloy[J].Acta Metallurgica,1974,22(5):601-609.
[12]PLEWES J T.Spinodal Cu-Ni-Sn alloys are strong and superductile[J].Metal Progress,1974,106(7):46-48.
[13]张利衡.添加Mn和Cr对Cu-9Ni-6Sn合金组织与性能的影响[J].上海有色金属,2003,24(3):112-119.
[14]崔忠圻,刘北兴.金属学与热处理原理[M].2版.哈尔滨:哈尔滨工业大学,2004.