Transactions of Materials and Heat Treatment

Title：Hot deformation behavior on low-alloy high-abrasive steel used for forging bucket teeth

Authors： Xu Wuyang Liu Hua Cao Junhui Wu Shengchao

Unit： Zhengzhou Research Institute of Mechanical Engineering

KeyWords： low-alloy high-abrasive steel constitutive equation forging excavator bucket teeth high temperature hot deformation behavior

ClassificationCode：TG314

year,vol(issue):pagenumber：2017,42(2):128-132

Abstract：

To study the hot deformation behavior of one new low-alloy high-abrasive steel used for forging bucket teeth at high temperature, isothermal compression tests were carried out by Gleeble-1500D thermal-simulation machine, and the true stress-true strain curves were obtained at temperatures 1173-1473 K and strain rates 0.01-10 s-1. Then, the flow stress characteristics at high temperature were studied, and the physical nature of hot deformation behavior was analyzed. Furthermore, the parameters of constitutive equation were obtained by fitting calculation to provide material property data for the numerical simulation of the forging process of bucket teeth. The results show that within the hot deformation temperature range, the flow stress decreases with the increase of deformation temperature at a constant strain rate, and the flow stress increases with the increase of strain rate at a constant deformation temperature. Therefore, during the hot deforming process, the flow stress of testing material can be accurately described by the constitutive equation, and the average relative error between the predicted and experimental flow stresses is 2.29% with the maximum relative error of 5.37%.

Funds：

郑州市科技重大专项资金（152PZDX007）

许午阳（1992-），男，硕士研究生刘华（1962-），男，博士，博士生导师，研究员

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