| 热处理对粉末高温合金不均匀变形的改善作用 |
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| 引用本文： | 雷应毅,姚泽坤,宁永权,谢兴华,郭鸿镇,陶 宇.热处理对粉末高温合金不均匀变形的改善作用[J].稀有金属材料与工程,2012,41(9):1689-1692. |
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| 作者姓名： | 雷应毅 姚泽坤 宁永权 谢兴华 郭鸿镇 陶 宇 |
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| 作者单位： | 1. 西北工业大学,陕西西安,710072
2. 钢铁研究总院,北京,100081 |
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| 摘 要： | 粉末高温合金因合金化程度高、可锻性差,在锻造加工过程中容易发生不均匀变形和开裂.利用OM、SEM和TEM分析粉末高温合金易产生不均匀变形的组织原因,初步探索了退火处理对改善组织,提高可锻性的原因.结果表明:由于晶粒转动和第二相不均匀分布引起的微观不均匀变形是导致宏观不均匀变形的直接原因；经锻前多台阶热处理后,三晶粒交界处生成细小等轴晶层,第二相弥散分布均有利于粉末高温合金变形.
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| 关 键 词： | 粉末高温合金 不均匀变形 晶粒转动 第二相 退火 |
| 收稿时间： | 2011/9/10 0:00:00 |
Improvement of Forging Heat Treatment on Inhomogeneous Deformation of P/M Superalloy |
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| Lei Yingyi,Yao Zekun,Ning Yongquan,Xie Xinghu,Guo Hongzhen and Tao Yu.Improvement of Forging Heat Treatment on Inhomogeneous Deformation of P/M Superalloy[J].Rare Metal Materials and Engineering,2012,41(9):1689-1692. |
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| Authors: | Lei Yingyi Yao Zekun Ning Yongquan Xie Xinghu Guo Hongzhen and Tao Yu |
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| Affiliation: | 1. Northwestern Polytechnical University, Xi’an 710072, China)(2. Central Iron and Steel Research Institute, Beijing 100081, China) |
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| Abstract: | Inhomogeneous deformation and cracking could easily appear during forging for powder metallurgy (P/M for short) superalloy. OM, SEM and TEM were employed to find the reasons of inhomogeneous deformation. The action of annealing on improving the microstructure and malleability was explored preliminarily. The results indicate that inhomogeneous microscopic deformation caused by grains turn and non-uniform secondary particles can lead to inhomogeneous deformation. Through the multistage annealing before forging, equiaxed fine grain layer appeared in the junction of three grains and made secondary particles disperse, which is attributed to homogeneous deformation of P/M superalloy. |
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| Keywords: | P/M superalloy inhomogeneous deformation grain turn secondary particle preannealing treatment |
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