摘要
Hot deformation behavior of powder metallurgical high tungsten alloy steel was investigated by Gleeble thermal simulator in a temperature range of 900~1100℃ and a strain rate range of 0.001~1 s-1. The results show that the flow stress decreases with the decrease of strain rate and the increase of deformation temperature. A constitutive equation is derived with Arrhenius hyperbolic sine function, and a processing map is constructed. The activation energy is 377 kJ/mol. The suitable processing regions are 1000~1100℃/ 0.001~0.01 s-1. The precipitation of tungsten-rich μ phase occurs during hot deformation process. Microvoids and micro-cracks form in the bulging region of the specimen. The amount of microvoid increases with the increase of strain rate and the decrease of temperature. The μ phase precipitation improves the high temperature strength of the steel.
| 投稿的翻译标题 | 粉末冶金高钨合金钢热变形行为与加工图 |
|---|---|
| 源语言 | 英语 |
| 页（从-至） | 4201-4208 |
| 页数 | 8 |
| 期刊 | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
| 卷 | 50 |
| 期 | 12 |
| 出版状态 | 已出版 - 12月 2021 |