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Processing Map of C71500 Copper-nickel Alloy and Application in Production Practice

Journal of Wuhan University of Technology(Materials Science) 2020年第6期35卷 1104-1115页

作者： GAO Xin WU Huibin LIU Ming ZHANG Yuanxiang GAO Feng SUN Hui Institute of Engineering Technology University of Science and Technology BeijingBeijing 100083China General Research Institute of Nonferrous Metals Beijing 100088China Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China State Key Laboratory for Strength and Vibration of Mechanical Structures Xi'an Jiaotong UniversityXi'an 710049China The State Key Lab of Rolling and Automation Northeastern UniversityShenyang 110819China School of Materials Science And Engineering Harbin Institute of TechnologyHarbin 150001China

The isothermal compression tests of C71500 copper-nickel alloy at different temperatures (1 073-1 273 K) and strain rates (0.01-10 s^-1) were carried out on Gleeble-3500 thermo-mechanical *** real stress-strain data were *** the basis of dynamic material model,the power dissipation was *** peak efficiency of the power dissipation is 57%.At the same time,Prasad’s,Murty’s and Babu’s instability criteria based on Ziegler’s expectant rheology theory,and Gegel’s and Malas’s instability criteria based on Lyaponov’s function theory,were used to predict the unstable regions in the processing *** maximum entropy generation rate and large plastic deformation principle are more in line with the hot deformation process of C71500 alloy,so the accuracy of Prasad’s instability criterion is much *** to the obtained macro-crack and micro-metallographic structure morphologies,the temperature range of 1 098-1 156 K and the strain rate range of 2.91-10 s^-1,and the temperature range of 1 171-1 273 K and the strain rate range of 0.01-0.33 s^-1 are more suitable for the processing area of C71500 *** accuracy of the above conclusions were verified by the forging of materials and the analysis of hot piercing *** significance of this paper is to provide theoretical basis and technological conditions for hot-press processing of C71500 alloy.

关键词： copper-nickel alloy processing map instability criteria verification forging hot piercing tubes

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