陈雨来,杨东艳,李静媛

• 1:北京科技大学冶金工程研究院
• 2:北京科技大学材料科学与工程学院

摘要(Abstract)：

以自制Co-Ni合金(31%Co-42%Ni-18Cr-9%Mo)为研究对象,在83.7%总变形量冷轧后进行了400~700℃、1~10 h的时效热处理。对不同状态的试样进行强度、硬度和伸长率检测,并通过XRD、SEM和TEM对实验合金的拉伸断口和微观组织进行分析。结果表明:该Co-Ni合金在500℃等温时效4 h后抗拉强度最高,达2220.19 MPa,比冷轧状态提高21.63%,同时其显微维氏硬度也达到极值650 HV,比冷轧状态提高28.6%。显微组织分析发现,新生的纳米级片层状孪晶起到主要的强化作用;在冷轧过程中应变诱导产生的Co(Cr,Mo)颗粒在时效过程中重新溶入基体,对合金的强度无明显作用;当时效温度高于600℃时,合金强度大大降低,塑性明显提高。

关键词(KeyWords)： Co-Ni合金;时效;强化;孪晶

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51174026)

作者(Author): 陈雨来,杨东艳,李静媛

DOI: 10.13289/j.issn.1009-6264.2016.09.010

参考文献(References)：

• [1]Rishi pal singh,Roger D Doherty.Strengthening in multiphase(MP35N)alloy:Part I.Ambient temperature deformation and recrystallization[J].Metallurgical Transactions A,1992,23(1):307-319.
• [2]Graham A H,Youngblood J L.Work strengthening by a deformation-induced phase transformation in“MP alloys”[J].Metallurgical and Materials Transactions B,1970,1(2):423-430.
• [3]Ishmaku A,Han K.Characterization of cold-rolled and aged MP35N alloys[J].Materials Characterization,2001,47(2):139-148.
• [4]Assefpour-Dezfuly M,Bonfield W.Strengthening mechanisms in elgiloy[J].Journal of Materials Science,1984,19(9):2815-2836.
• [5]Lu S,Shang B,Luo Z,et al.Investigation on the cold deformation strengthening mechanism in MP159 alloy[J].Metallurgical and Materials Transactions A,2000,31(1):5-13.
• [6]Graham A H.Strengthening of MP alloys during aging at elevated temperatures[R].EI du Pont de Nemours and Co,Wilmington,Del,1969,62:930-935.
• [7]Asgari S,El-Danaf E,Shaji E,et al.The secondary hardening phenomenon in strain-hardened MP35N alloy[J].Acta Materialia,1998,46(16):5795-5806.
• [8]Sorensen D,Li B Q,Gerberich W W,et al.Investigation of secondary hardening in Co-35Ni-20Cr-10Mo alloy using analytical scanning transmission electron microscopy[J].Acta Materialia,2014,63:63-72.
• [9]Prasad M,Reiterer M W,Kumar K S.Microstructure and mechanical behavior of an as-drawn MP35N alloy wire[J].Materials Science and Engineering A,2014,610:326-337.
• [10]金晓鸥,王正君,金晓男,等.室温大气环境下450℃时效态3J21合金拉伸性能[J].钢铁研究学报,2010(4):27-30.JIN Xiao-ou,WANG Zheng-jun,JIN Xiao-nan,et al.Tensile properties of aging at 450℃state 3J21 at room temperature[J].Journal of Iron and Steel Research,2010(4):27-30.
• [11]黄平云,郭生武,王伟,等.冷轧变形Co40Ni Cr Mo微观组织和力学性能[J].长安大学报(自然科学版),2011(5):106-110.HUANG Ping-yun,GUO Sheng-wu,WANG Wei,et al.The microstructure and mechanical properties of cold rolling Co40Ni Cr Mo[J].Chang'an University(Natural Science Edition),2011(5):106-110.
• [12]金晓鸥,王正君,何世禹,等.室温大气环境下欠时效态3J21合金的拉伸性能[J].钢铁研究,2010(3):17-19.JIN Xiao-ou,WANG Zheng-jun,HE Shi-yu,et al.Tensile properties of under aging 3J21 at room temperature[J].Steel Research,2010(3):17-19.
• [13]金晓鸥,刘洪波,何世禹,等.室温大气环境下过时效态3J21合金疲劳行为[J].材料开发与应用,2011(4):16-19.JIN Xiao-ou,WANG Zheng-jun,HE Shi-yu,et al.The fatigue behavior of over aged 3J21 alloy at room temperature[J].Development and Application of Materials,2011(4):16-19.
• [14]金晓鸥,何世禹,薛文博.不同时效态3J21合金疲劳行为[J].材料工程,2007(6):26-30.JIN Xiao-ou,HE Shi-yu,XUE Wen-bo.The 3J21 alloy fatigue behavior in different aging states[J].Materials Engineering,2007(6):26-30.
• [15]Zhang P,Li S X,Zhang Z F.General relationship between strength and hardness[J].Materials Science and Engineering A,2011,529:62-73.
• [16]WAN Wen-juan,HAN Guang-wei,DENG Bo.Influence of aging treatment on precipitation behavior ofηphase in Ni-Co-Cr alloy[J].Journal of Iron and Steel Research International,2010,17(1):64-69.
• [17]马秀萍,李超.铸造过热度和热处理对Co Cr Mo合金显微组织的影响[J].材料工程,2014(3):66-70.MA Xiu-ping,LI Chao.Effect of heat treatment and casting superheat on Co Cr Mo alloy microstructure[J].Materials Engineering,2014(3):66-70.
• [18]张瑞岩,陈子勇,聂祚仁.高锌超高强铝合金强韧化工艺研究[J].科学技术与工程,2012,28:7175-7178.ZHANG Rui-yan,CHEN Zi-yong,NIE Zuo-ren.The study toughening technology for high zinc ultra high strength aluminum[J].Science Technology and Engineering,2012,28:7175-7178.
• [19]杨钢,孙利军,张丽娜,等.形变孪晶的消失与退火孪晶的形成机制[J].钢铁研究学报,2009(2):39-43.YANG Gang,ZHANG Li-jun,ZHANG Li-na,et al.The mechanism of disappeared formation twins and annealing twins[J].Journal of Iron and Steel Research,2009(2):39-43.

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