孙健,孙潭,薛恒旭,王竟,戚添益

• 1:江苏科技大学冶金与材料工程学院

摘要(Abstract)：

采用应力松弛法研究了含Ti模具钢和不含Ti模具钢的应力松弛过程特征,对其应力松弛过程特征曲线和析出相显微形貌进行了分析。结果表明:随着温度和变形量增大,模具钢的流变应力降低,真应力-真应变曲线趋于平缓。应力松弛过程温度越高,松弛极限越低,含Ti钢的应力平台更明显,增加变形量可提高应力松弛速率。含Ti钢的析出量-温度-时间曲线(PTT曲线)于900～975℃为"C"型,鼻点温度在930℃左右;当变形量为15%时,析出开始与结束时间较30%变形量滞后。析出相主要沿晶界和位错附近析出,增大变形量有利于析出相析出。

关键词(KeyWords)： 变形温度;变形量;真应力-真应变曲线;应力松弛曲线;析出量-温度-时间曲线;析出相

Abstract:

Keywords:

基金项目(Foundation): “十三五”国家重点研发计划项目(2017YFB0603800);; 江苏省自然科学青年基金(BK20140516)

作者(Author): 孙健,孙潭,薛恒旭,王竟,戚添益

DOI: 10.13289/j.issn.1009-6264.2018-0252

参考文献(References)：

• [1] 张秀凤.预应力钢材抗应力松弛性能的研究与探讨[J].上海钢研,2005(2):48-54.ZHANG Xiu-feng.Research and discussion for anti-stress-relaxation property of PC steel products[J].Shanghai Steel and Iron Research,2005(2):48-54.
• [2] Hariharan K,Dubey P,Jain J.Time dependent ductility improvement of stainless steel SS 316 using stress relaxation[J].Materials Science and Engineering A,2016,673:250-256.
• [3] Hariharan K,Majidi O,Kim C,et al.Stress relaxation and its effect on tensile deformation of steels[J].Materials and Design,2013,52(52):284-288.
• [4] Uppaluri R,Helm D.Thermomechanical characterization of 22MnB5 steels with special emphasis on stress relaxation and creep behavior[J].Materials Science and Engineering A,2016,658:301-308.
• [5] Wang H,Clausenb B,Wu P D.Studying the effect of stress relaxation and creep on lattice strain evolution of stainless steel under tension[J].Acta Materialia,2013,61(4):1179-1188.
• [6] 张力宁,周锦银.60Si2Mn弹簧钢的微塑性变形及应力松弛行为[J].机械工程学报,1992,28(1):27-29.ZHANG Li-ning,ZHOU Jin-yin.The microplastic deformation and stress relaxation behaviour in 60Si2Mn[J].Journal of Mechanical Engineering,1992,28(1):27-29.
• [7] 赵子毅,李培耀.一种新型螺栓用钢的应力松弛行为研究[J].热加工工艺,2017,46(4):111-113.ZHAO Zi-yi,LI Pei-yao.Study on stress relaxation behavior of new type bolt steel[J].Hot Working Technology,2017,46(4):111-113.
• [8] 高红,夏月波.弹性材料动态应力松弛机理的研究[J].鞍山师范学院学报,1999,1(1):91-94.GAO Hong,XIA Yue-bo.Study on cyclic stress relaxation mechanism of elastic material[J].Journal of Anshan Teachers College,1999,1(1):91-94.
• [9] 刘勇,刘红芳.KSC72A钢丝应力松弛行为研究[J].金属制品,2014,40(3):56-60.LIU Yong,LIU Hong-fang.Study on KSC72A steel wire stress relaxation[J].Metal Products,2014,40(3):56-60.
• [10] 曹铁山,程从前,朱月梅,等.CrMoWV钢的应力松弛行为及预测[J].材料工程,2017,45(5):106-111.CAO Tie-shan,CHENG Cong-qian,ZHU Yue-mei,et al.Stress relaxation behavior and its prediction of CrMoWV steel[J].Journal of Materials Engineering,2017,45(5):106-111.
• [11] 许军,李会芳,程从前,等.基于应力松弛实验对服役25Cr35Ni型耐热钢的高温性能评估[J].材料工程,2017,45(8):96-101.XU Jun,LI Hui-fang,CHENG Cong-qian,et al.High temperature performance evaluation of as-serviced 25Cr35Ni type heat-resistant steel based on stress relaxation tests[J].Journal of Materials Engineering,2017,45(8):96-101.
• [12] Guguloth K,Swaminathan J,Roy N,et al.Uniaxial creep and stress relaxation behavior of modified 9Cr-1Mo steel[J].Materials Science and Engineering A,2017,684:683-696.
• [13] Jia Z,Misra R D K,Malley R O,et al.Fine-scale precipitation and mechanical properties of thin slab processed titanium-niobium bearing high strength steels[J].Materials Science and Engineering:A,2011,528(22/23):7077-7083.
• [14] 陈建华,张喜燕,刘攀,等.低碳微合金钢中碳化钛的等温析出行为[J].机械工程材料,2014,38(5):48-51.CHEN Jian-hua,ZHANG Xi-yan,LIU Pan,et al.Isothermal precipitation of TiC in low carbon micro-alloyed steel[J].Materials of Mechaninal Engineering,2014,38(5):48-51.
• [15] 陈祥,李言祥,王志胜,等.Ti对高硼钢显微组织和高温力学性能的影响[J].稀有金属材料与工程,2018,47(3):803-809.CHEN Xiang,LI Yan-xiang,WANG Zhi-sheng,et al.Effects of Ti on microstructure and high temperature mechanical properties of high-boron steel[J].Rare Metal Materials and Engineering,2018,47(3):803-809.
• [16] 王昭东,曲锦波,刘相华,等.松弛法研究微合金钢碳氮化物的应变诱导析出行为[J].金属学报,2000,36(6):618-621.WANG Zhao-dong,QU Jin-bo,LIU Xiang-hua,et al.Investigation of strain-induced precipitation behavior in a microalloying steel by stress relaxation method[J].Acta Metallurgica Sinica,2000,36(6):618-621.
• [17] 曹建春.铌钼复合微合金钢中的碳氮化物沉淀析出研究[D].昆明:昆明理工大学,2006.CAO Jian-chun.Study on precipitation of carbonitrides in Ni -Mo composite microalloyed steel[D].Kunming:Kunming University of Science and Technology,2006.
• [18] 岳嵩.铌钒微合金化连续油管组织性能研究[D].沈阳:东北大学,2013.YUE Song.Research on microstructure and properties of Nb, V micro-alloyed the coiled tuding[D].Shenyang:Northeastern University,2013.
• [19] 薛春芳,胡贻苏.14MnNbq钢中Nb的作用[J].重庆大学学报(自然科学版),2002,25(3):89-93.XUN Chun-fang,HU Yi-su.The effect of Nb in 14MnNbq steel[J].Journal of Chongqing University(Natural Science Edition),2002,25(3):89-93.
• [20] 赵冬伟.钛微合金钢中钼对含钛碳氮化物在奥氏体中溶解与析出的影响[D].昆明:昆明理工大学,2012.ZHAO Dong-wei.Effect of molybdenum on the dissolution and precipitation of titanium-bearing carbonitrides in austenite in titanium microalloyed steel[D].Kunming:Kunming University of Science and Technology,2012.
• [21] Dutta B,Sellars C M.Effect of composition and process variables on Nb(C,N) precipitation in niobium microalloyed austenite[J].Metal Science Journal,2014,3(3):197-206.
• [22] Zhou X G,Liu Z Y,Yuan X Q,et al.Modeling of strain-induced precipitation kinetics and evolution of austenite grains in Nb microalloyed steels[J].Journal of Iron and Steel Research,2008,15(3):65-69.

文章评论(Comment)：