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.
所属栏目
物理模拟与数值模拟重庆市科委应用开发计划重大项目(cstc2013yykfc60004)
收稿日期
2013/11/52014/11/1
作者单位
江华德:重庆理工大学材料科学与工程学院, 重庆 400054
陈元芳:重庆理工大学材料科学与工程学院, 重庆 400054
汤萌:重庆理工大学材料科学与工程学院, 重庆 400054
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
参考文献
【1】
张玉庭.热处理技师手册[M].北京:机械工业出版社,2007:533-540.
【2】
DEARDO A J.Microalloyed strip steels for the 21st century[J].Materials Science Forum,1998,284/286:15-26.
【3】
GONZALEZ-BAQUET I,KASPAR R,RICHTER J,et al.Microalloying and a new post forging treatment of medium carbonsteels[J].Materials Science Forum,1998,284/286:411-418.
【4】
NAYLOR D J.Microalloyed forging steels[J].Materials Science Forum,1998,284/286:83-94.
【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.
