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首页> 外文期刊>Journal of Materials Engineering and Performance >Hot Deformation Behavior and Processing Map of As-Cast 40CrNiMo Alloy Steel
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Hot Deformation Behavior and Processing Map of As-Cast 40CrNiMo Alloy Steel

机译：铸造40crnimo合金钢的热变形行为和处理地图

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摘要

The as-cast 40CrNiMo alloy steel with uniform microstructure is obtained through vacuum casting by using metal mold. The hot deformation behavior of as-cast 40CrNiMo alloy steel is investigated by isothermal compression tests. The Arrhenius constitutive model and processing maps of as-cast 40CrNiMo alloy steel are constructed. The results indicate that the true stress-strain curves present typical dynamic recovery type under low deformation temperature and high strain rate. With the increases in deformation temperature or the decreases in strain rate, the true stress-strain curves gradually transform to dynamic recrystallization type. Through the analysis of processing maps and microstructures, it can be found that the area of plastic instability increases with the increase in the strain and gradually expands to the region of high deformation temperature and low strain rate. The deformation temperature range of 850-1050 degrees C and strain rate range of 0.001-0.01 s(-1) are recommended as the reasonable hot-working process conditions. Results of this research can provide references for the selection of process parameters in casting-forging combination forming of 40CrNiMo alloy steel.
机译：通过使用金属模具，通过真空铸造获得具有均匀微观结构的AS铸造40crnimo合金钢。通过等温压缩试验研究了铸造40crnimo合金钢的热变形行为。构建了铸造40crnimo合金钢的Arrhenius结构型模型和处理地图。结果表明，真正的应力 - 应变曲线在低变形温度和高应变率下存在典型的动态回收型。随着变形温度的增加或应变率降低，真正的应力 - 应变曲线逐渐变换为动态再结晶型。通过对处理地图和微结构的分析，可以发现塑料不稳定性的面积随着应变的增加而增加，并且逐渐扩展到高变形温度和低应变率的区域。建议使用850-1050℃的变形温度范围和0.001-0.01秒（-1）的应变速率范围作为合理的热工作过程条件。该研究的结果可以为40crnimo合金钢的铸造锻造组合形成的过程参数提供参考。

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