Constitutive relationship of 4Cr9Si2 and technological parameters on the inner bore of cross wedge rolling for preform hollow valves

The hot deformation behavior of 4Cr9Si2 heat-resistant steel was investigated by hot deformation compression tests in the deformation temperature range of 950–1180 °C with strain rates of 0.1–10 s−1. The constitutive equation of 4Cr9Si2 heat-resistant steel was established to describe the peak stress as a function of the deformation temperature and strain rate. The deformation characteristics of the cross wedge rolling (CWR) process of preform hollow valves are analyzed. By using DEFORM-3D software for finite element simulation tools, the process of CWR forming hollow valves was analyzed. According to the finite element simulation results, which reveal the influence of different process parameters on the inner diameter of the hollow valve blank, changing the stretching angle of the die design method effectively improves the position wedge reaming of the workpiece.

[1]  Bernd-Arno Behrens,et al.  Development of a warm cross wedge rolling process using FEA and downsized experimental trials , 2012, Prod. Eng..

[2]  Nak Kyu Lee,et al.  Simulation of Electric Upsetting and Forging Process for Large Marine Diesel Engine Exhaust Valves , 2006 .

[3]  S. Spigarelli,et al.  Analysis of the effect of Deep Cryogenic Treatment on the hardness and microstructure of X30 CrMoN 15 1 steel , 2012 .

[4]  M. Leeflang,et al.  Constitutive behavior and microstructure evolution of the as-extruded AE21 magnesium alloy during hot compression testing , 2015 .

[5]  Y. Lin,et al.  Hot tensile deformation behaviors and fracture characteristics of a typical Ni-based superalloy , 2014 .

[6]  Gang Liu,et al.  Behavior and modeling of flow softening and ductile damage evolution in hot forming of TA15 alloy sheets , 2015 .

[7]  Z Pater.  Theoretical and experimental analysis of cross wedge rolling process , 2000 .

[8]  Zbigniew Pater,et al.  The influence of hollow billet thickness in rotary compression , 2016 .

[9]  Baoyu Wang,et al.  Two constitutive descriptions of boron steel 22MnB5 at high temperature , 2014 .

[10]  Jue Zhong,et al.  Constitutive modeling for elevated temperature flow behavior of 42CrMo steel , 2008 .

[11]  Tongsheng Deng,et al.  Constitutive modeling and microstructure change of Ti–6Al–4V during the hot tensile deformation , 2012 .

[12]  Zhenghuan Hu,et al.  Research on the ovality of hollow shafts in cross wedge rolling with mandrel , 2016 .

[13]  Y. Lin,et al.  Dynamic recrystallization behavior of a typical nickel-based superalloy during hot deformation , 2014 .

[14]  F. V. Tahami,et al.  Creep constitutive equations for cold-drawn 304L stainless steel , 2010 .

[15]  Cheng Guo,et al.  Constitutive relationship and microstructure for 20CrMnTiH steel during warm deformation , 2012 .

[16]  Y. Lin,et al.  Constitutive models for high-temperature flow behaviors of a Ni-based superalloy , 2014 .

[17]  Baoyu Wang,et al.  A new application of unified constitutive equations for cross wedge rolling of a high-speed railway axle steel , 2015 .

[18]  J. Zhong,et al.  Effect of temperature and strain rate on the compressive deformation behavior of 42CrMo steel , 2008 .

[19]  W. P. Liu,et al.  Stress distributions during the cross-wedge rolling of composite 42CrMo/Q235 laminated shafts , 2016 .

[20]  Xiaofeng Yan,et al.  Characterization of hot deformation behavior of GH925 superalloy using constitutive equation, processing map and microstructure observation , 2015 .

[21]  Guo-zheng Quan,et al.  Constitutive modeling for the dynamic recrystallization kinetics of as-extruded 3Cr20Ni10W2 heat-resistant alloy based on stress–strain data , 2013 .

[22]  Y. Lin,et al.  A critical review of experimental results and constitutive descriptions for metals and alloys in hot working , 2011 .

[23]  Shengdun Zhao,et al.  Study on the material characteristic and process parameters of the open-die warm extrusion process of spline shaft with 42CrMo steel , 2013 .

[24]  H. Yang,et al.  Internal-state-variable based self-consistent constitutive modeling for hot working of two-phase titanium alloys coupling microstructure evolution , 2011 .

[25]  Yuanzhi Zhu,et al.  Microstructural mapping in closed die forging process of superalloy Nimonic 80a valve head , 2011 .

[26]  Y. Xiong,et al.  Microstructure characteristics in high carbon steel rod after warm cross-wedge rolling , 2005 .

[27]  Dong Young Kim,et al.  Application of nimonic 80A to the hot forging of an exhaust valve head , 2001 .

[28]  Fu Qiang Ying,et al.  Analysis on temperature distribution in cross wedge rolling process with finite element method , 2007 .

[29]  Qiang Li,et al.  Establishment of failure conditions for the cross-wedge rolling of hollow shafts , 2006 .

[30]  Li Yong,et al.  Effect of warm cross-wedge rolling on microstructure and mechanical property of high carbon steel rods , 2006 .

[31]  Hongying Li,et al.  Application of artificial neural network and constitutive equations to describe the hot compressive behavior of 28CrMnMoV steel , 2012 .

[32]  Andrzej Gontarz,et al.  A new process for the forming of a triangular flange in hollow shafts from Ti6Al4V alloy , 2015 .

[33]  Baoyu Wang,et al.  Cross-wedge rolling of a 4Cr9Si2 hollow valve: explorative experiment and finite element simulation , 2015 .

[34]  Qiang Li,et al.  Development of a critical friction model for cross wedge rolling hollow shafts , 2006 .

[35]  Andrzej Gontarz,et al.  Producing hollow drive shafts by rotary compression , 2015 .

[36]  Jarosław Bartnicki,et al.  The aspects of stability in cross-wedge rolling processes of hollowed shafts , 2004 .

[37]  Kaveh A. Tagavi,et al.  Analysis of interfacial slip in cross-wedge rolling: a numerical and phenomenological investigation , 2000 .

[39]  Cheng Guo,et al.  Constitutive modelling for high temperature behavior of 1Cr12Ni3Mo2VNbN martensitic steel , 2011 .

[40]  Ning Zhang,et al.  Effect of cross wedge rolling on the microstructure of GH4169 alloy , 2012, International Journal of Minerals, Metallurgy, and Materials.

[41]  J. Yeom,et al.  Hot forging of a nickel-base superalloy , 2001 .

[42]  Jie Zhou,et al.  Influence of tool parameters on tool wear in two-roll cross-wedge rolling , 2013 .

[43]  Juan Ma,et al.  Thermo-physical simulation of the compression testing for constitutive modeling of GH4169 superalloy during linear friction welding , 2016 .

[44]  Jong-Rae Cho,et al.  Microstructure prediction of Nimonic 80A for large exhaust valve during hot closed die forging , 2005 .

[45]  Andrzej Gontarz,et al.  Cross-wedge rolling by means of one flat wedge and two shaped rolls , 2006 .

[46]  Feng-shan Du,et al.  Analysis of Metal Forming in Two-Roll Cross Wedge Rolling Process Using Finite Element Method , 2009 .

[47]  Zbigniew Pater,et al.  The Effect of Billet Wall Thickness on the Rotary Compression Process for Hollow Parts , 2015 .

[48]  Kaveh A. Tagavi,et al.  Influence of Material Properties and Forming Velocity on the Interfacial Slip Characteristics of Cross Wedge Rolling , 2001 .