钛含量对低镍铜合金显微组织和性能的影响
Influence of Ti Content on Microstructure and Properties of Low-Nickel Copper Alloys
摘 要
采用真空感应熔炼法制备了不同钛含量的Cu-2.8Ni-1.1Fe-0.9Mn-xTi (x=0～1.79%, 质量分数) 低镍铜合金, 采用显微组织观察、拉伸试验和腐蚀试验等研究了钛含量对合金显微组织、力学性能及在模拟海水中耐腐蚀性能的影响。结果表明: 低镍铜合金中加入少量钛后, 晶粒明显细化, 组织中有细小弥散分布的第二相析出, 并随钛含量的增加而增多, 当合金中钛含量为1.79%时, 组织中还出现了大尺寸块状相; 随着钛含量的增加, 低镍铜合金的强度和硬度逐渐提高, 而塑性则有一定下降; 在模拟海水中加钛铜合金的腐蚀速率随钛含量的增加先降后升, 且均小于不加钛的铜合金, 钛含量为0.88%时, 腐蚀速率最低, 为14.486 6 mg·m-2·h-1。
钛含量
显微组织
力学性能
耐蚀性能
copper alloy
Ti content
microstructure
mechanical property
corrosion resistance
Abstract
Cu-2.8Ni-1.1Fe-0.9Mn-xTi low-nickel copper alloys with different contents of Ti (x=0～1.79%, mass) were prepared by vacuum induction melting. The effects of Ti content on microstructure, mechanical properties and corrosion resistance in simulated seawater of the copper alloy were studied by microstructure observation, tensile testing and corrosion testing. The results show that the grain size decreased obviously, and the small and dispersed phases precipitated with adding element Ti in the low-nickel copper alloy; the precipitation phases increased with increasing the Ti content; besides the small and dispersed phases, massive phases appeared in the copper alloy with 1.79% Ti added. The tensile strength and hardness of the low-nickel copper alloy improved gradually and the plasticity slightly decreased with the increase of Ti content. The corrosion rates of the copper alloys with Ti in simulated seawater first decreased and then increased with the increase of Ti content, but all of them were lower than that of the copper alloy without Ti. The copper alloy with 0.88% Ti has the lowest corrosion rate, 14.486 6 mg·m-2·h-1.
中图分类号 TG146.2
所属栏目 试验研究
基金项目 江苏省重大科技成果转化专项资金项目(BA2009035)
收稿日期 2014/3/22
修改稿日期 2014/9/1
网络出版日期
作者单位点击查看
备注张强(1986-), 男, 江苏江阴人, 工程师, 硕士。
引用该论文: ZHANG Qiang,YU Xin-quan,WANG Shu-qiang,LU Xiao-bin,XIE Jian-pin,GAN Mei-lu. Influence of Ti Content on Microstructure and Properties of Low-Nickel Copper Alloys[J]. Materials for mechancial engineering, 2014, 38(10): 9～15
张强,余新泉,王书强,陆筱彬,谢建平,甘美露. 钛含量对低镍铜合金显微组织和性能的影响[J]. 机械工程材料, 2014, 38(10): 9～15
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参考文献
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【2】BECCARIA A M, CROUSIER J. Infuence of iron addition on corrosion layer built up on 70Cu-30Ni alloy in sea water[J].British Corrosion Journal, 1991, 26(3): 215-216.
【3】CAREW J A, LSLAM M. Erosion corrosion of copper and nickel based alloys in polluted seawater[J].Materials Selection & Design, 1995, 4(6): 54-57.
【4】PERKINS J, GRAHAM K J, STORM G A. Flow effects on corrosion of galvanic couples in sea water[J].Corrosion, 1979, 35: 23-29.
【5】CHANDRASHEKAR T, MURALIDHARA M K, KASHYAP K T. Effect of growth restricting factor on grain refinement of aluminum alloys[J]. The International Journal of Advanced Manufacturing Technology, 2009, 40(3): 234-241.
【6】贾淑果, 刘平, 郑茂盛, 等.铜合金固溶强化的电子理论解释[J]. 中国有色金属学报, 2008, 18(8): 1522-1526.
【7】谢春生, 翟启明, 徐文清, 等.高强度高导电性铜合金强化理论的研究与应用发展[J]. 金属热处理, 2007, 32(1): 12-20.
【8】KENDIG K L, MIRACLE D B. Strengthening mechanisms of an Al-Mg-Sc-Zr alloy[J]. Acta Mater, 2002, 50(10): 4165-4175.
【9】张秀群, 孙扬善, 薛烽, 等.Ni, Si, Mn和Ti对高强度铜合金力学性能和导电性能的影响[J].东南大学学报: 自然科学版, 2003, 33(4): 458-462.
【10】林高用, 张胜华. Cu-Ni-Si-Cr-Fe合金时效强化特征的研究[J].金属热处理, 2001, 26(4): 28-30.
【11】李斌, 刘贵民, 丁华东, 等.弥散强化铜合金的研究现状[J].材料导报, 2012, 26(9): 107-111.
【12】孙菲, 阎璐, 谢春生. 铝含量对Cu-5.6Ni-2.5Mn-2Sn合金组织与性能的影响[J].机械工程材料, 2013, 37(2): 37-42.
【13】赵启淞, 起华荣, 王璐, 等.钛加入量对锌铝铜镁稀土合金组织和拉伸性能的影响[J].机械工程材料, 2013, 37(12): 67-70.
【14】陈海燕, 朱有兰.B10铜镍合金在NaCl溶液中腐蚀行为的研究[J].腐蚀与防护, 2006, 27(8): 392-395.
【15】IJSSELING F P, DROLENGA L J P, KOLSTER B H. Influence of temperature on corrosion product film formation on CuNi10Fe in the low temperature rage: I-Corrosion rate as a function of temperature in well aerated sea water[J].British Corrosion Journal, 1982, 17(4): 162-167.
【16】林乐耘, 刘少峰, 刘增才, 等.铜镍合金海水腐蚀的表面与界面特征研究[J].腐蚀科学与防护技术, 1999, 11(1): 37-42.
【17】朱小龙, 李中建, 徐杰. Cu-Ni合金海水腐蚀产物膜的形成与破裂机制研究进展[J].稀有金属, 1997, 21(6): 463-468.
【18】曹中秋, 刘伟华, 薛荣, 等. 晶粒细化对Cu-40Ni合金在酸性含Cl-介质中耐蚀性能的影响[J].稀有金属, 2006, 30(6): 735-739.
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