38MnVTi非调质钢的高温热压缩变形特性及加工图
Thermal Compression Deformation Performance at High Temperature and Processing Maps of Non-quenched and Tempered Steel 38MnVTi
摘 要
采用Gleeble-1500D型热模拟试验机对38MnVTi非调质钢进行热压缩试验,研究了其在950~1 200℃和应变速率为0.01~10 s-1条件下的热变形行为,基于Parasd和Murty两种失稳判据分别建立了动态材料模型(DMM)的加工图,利用加工图确定了试验钢在应变为0.8下的流变失稳区,并分析了两种加工图的差别.结果表明:两种加工图中失稳区域的面积大小相近,功率耗散系数的数值变化趋势相似,但它们的失稳区位置有差异;低的功率耗散系数可以作为一种识别热变形失稳的方法,应避免试验钢在高应变速率下进行大应变量变形;试验钢的热变形最佳工艺参数为变形温度1 050~1 200℃、应变速率0.04~1 s-1.
热压缩变形:加工图
non-quenched and tempered steel 38MnVTi
hot compression deformation
processing map
Abstract
The hot compression tests were carried out on non-quenched and tempered steel 38MnVTi by using Gleeble-1500D thermal simulation system,and the thermal deformation behavior of the tested steel at temperature of 950-1 200℃and strain rates of 0.01-10 s-1 was studied.Based on Parasd criterion and Murty criterion,the processing maps of dynamic material model(DMM) were built.The instability regions of flow behavior with strain of 0.8 could be recognized by the maps and the differences of the maps were also analyzed.The result show that the instability regions in the two maps were almost equal in area,and the change of numerical feature for the power dissipation coefficient also was similar,but the positions of instability regions were different.The low power dissipation coefficient could identify the instability for hot deformation and the deformation with large strain and high strain rate should be avoided for the tested steel.The best hot deformation progress parameters were the temperature range of 1 050-1 200℃ and strain rates of 0.04-1 s-1.
中图分类号 TG301
所属栏目 物理模拟与数值模拟
基金项目 重庆市科委应用开发计划重大项目(cstc2013yykfc60004)
收稿日期 2013/11/5
修改稿日期 2014/11/1
网络出版日期
作者单位点击查看
备注江华德(1986-),男,福建漳州人,硕士研究生.
引用该论文: JIANG Hua-de,CHEN Yuan-fang,TANG Meng. Thermal Compression Deformation Performance at High Temperature and Processing Maps of Non-quenched and Tempered Steel 38MnVTi[J]. Materials for mechancial engineering, 2015, 39(3): 98～102
江华德,陈元芳,汤萌. 38MnVTi非调质钢的高温热压缩变形特性及加工图[J]. 机械工程材料, 2015, 39(3): 98～102
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【5】WANG Chun-xia,YU Fu-xiao,ZHAO Da-zhi,et al.Hot deformation and processing maps of DC cast Al-15%Si alloy[J].Materials Science and Engineering:A,2013,577:73-80.
【6】PRASAD Y V R K,RAO K P.Materials modeling and finite element simulation of isothermal forging of electrolytic copper[J].Materials & Design,2011,32(4):1851-1858.
【7】RAJPUT S K,DIKOVITS M,CHAUDHARI G P,et al.Physical simulation of hot deformation and microstructural evolution of AISI 1016 steel using processing maps[J].Materials Science and Engineering:A,2013,587:291-300.
【8】MA Xiong,ZENG Wei-dong,XU Bin,et al.Characterization of the hot deformation behavior of a Ti-22Al-25Nb alloy using processing maps based on the Murty criterion[J].Intermetallics,2012,20(1):1-7.
【9】霍连喆,白兴红,孙丽坤,等.一种支承辊用高铬钢的热变形行为及其热加工图[J].机械工程材料,2013,37(10):64-68.
【10】PRASAD Y V R K,GEGEL H L,DORAIVELU S M,et al.Modeling of dynamic materials behavior in hot deformation:forging of Ti-6242[J].Metallurgical and Materials Transactions:A,1984,15:1883-1892.
【11】WELLSTEAD P E.Introduction to physical systems modeling[M].London,UK:Academic Press,1979.
【12】ZIEGLER H.Progress in solid mechanics[M].New York:John Wiley,1965:91-193.
【13】PRIGOGINE I.Time,structure and fluctuations[J].Science,1978,201:777-787.
【14】HILLBORN R C.Chaos and nonlinear dynamics:an introduction for scientists and engineers[M].New York:Oxford University Press,1994.
【15】PRASAD Y V R K.Processing maps:a status report[J].Journal of Materials Engineering and Performance,2003,12:638-645.
【16】HASSANIA F B E,CHENAOUIA A,DKIOUAKA R,et al.Characterization of deformation stability of medium carbon microalloyed steel during hot forging using phenomenological and continuum criteria[J].Journal of Materials Processing Technology,2008,199:140-149.
【17】鲁世强,李鑫,王克鲁,等.基于动态材料模型的材料热加工工艺优化方法[J].中国有色金属学报,2007,17(6):890-896.
【18】PRASAD Y V R K.Recent advances in the science of mechanical processing[J].Indian Journal of Technology,1990,28:435-451.
【19】KALYAN K A K S.Criteria for predicting metallurgical instabilities in processing maps[D]Bangalore,India:Indian Institute of Science,1987.
【20】NARAYANA M S V S,NAGESWARA R B.On the development of instability criteria during hot working with reference to IN718[J].Materials Science and Engineering:A,1998,254:76-82.
【21】NARAYANA M S V S,NAGESWARA R B.On the flow localization concept in the processing maps of titanium alloy Ti-24Al-20Nb[J].Journal of Materials Processing Technology,2000,104:103-109.
【22】NARAYANA M S V S,NAGESWARA R B.On the hot working characteristics of inconel alloy MA754 using processing maps[J].Scandinavian Journal of Metallurgy,2000,29:146-150.
【23】MOMENI A,DEHGHANI K.Characterization of hot deformation behavior of 410 martensitic stainless steel using constitutive equations and processing maps[J].Materials Science and Engineering:A,2010,527:5467-5473.
【24】KIM H Y,KWON H C,LEE H W,et al.Processing map approach for surface defect prediction in the hot bar rolling[J].Journal of Materials Processing Technology,2008,205(1/3):70-80.
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