| 一种粉末冶金铁素体钢中的双组态结构(英文) |
| |
| 引用本文： | 刘锋,刘咏,吴宏,方京华,赵大鹏,张刘杰,刘东华. 一种粉末冶金铁素体钢中的双组态结构(英文)[J]. 中国有色金属学会会刊, 2012, 22(2): 330-334. DOI: 10.1016/S1003-6326(11)61179-5 |
| |
| 作者姓名： | 刘锋 刘咏 吴宏 方京华 赵大鹏 张刘杰 刘东华 |
| |
| 作者单位： | 中南大学粉末冶金国家重点实验室 |
| |
| 基金项目： | Projects (50634060,50721003) supported by the National Natural Science Foundation of China;Project (2009AA03Z526) supported by the High-tech Research and Development Program of China;Project supported by the Open-End Fund for Valuable and Precision Instruments of Central South University |
| |
| 摘 要： | 采用混合预合金粉末和球磨粉末的方法,制备一种具有双组态结构的铁素体合金钢,其名义成分为Fe-14Cr-3W-0.42Ti-0.32Y。其微观组织与成分相同但是采用全球磨粉末成形的铁素体钢有明显的区别。通过热锻、空冷之后,该合金具有铁素体晶粒和马氏体晶粒混合构成的双组态结构。通过微观组织研究发现了在该合金中发生了局部的αbcc→γfcc→α'bcc相变。同时,这种双组态结构能够较好地均衡合金的强度和韧性。
|
| 关 键 词： | 铁素体钢 粉末冶金 相变 双组态结构 力学性能 |
| 收稿时间： | 2011-01-07 |
Bi-modal microstructure in a powder metallurgical ferritic steel |
| |
| LIU Feng,LIU Yong,WU Hong,FANG Jing-hua,ZHAO Da-peng,ZHANG Liu-jie,LIU Dong-hua. Bi-modal microstructure in a powder metallurgical ferritic steel[J]. Transactions of Nonferrous Metals Society of China, 2012, 22(2): 330-334. DOI: 10.1016/S1003-6326(11)61179-5 |
| |
| Authors: | LIU Feng LIU Yong WU Hong FANG Jing-hua ZHAO Da-peng ZHANG Liu-jie LIU Dong-hua |
| |
| Affiliation: | State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China |
| |
| Abstract: | Ferritic steel with a nominal composition of Fe-14Cr-3W-0.42Ti-0.32Y was prepared by mixing gas-atomized prealloyed powder and mechanically alloyed powder.The microstructure is much different from other ferritic steels with the same composition and prepared via only mechanically alloyed powder.A bi-modal structure,which consists of pure ferritic grains and martensitic grains,was obtained after hot forging and air cooling.A phase transformation of αbcc→γfcc→α’bcc was also discovered in microstructural observation.The bi-modal microstructure shows a good combination of high strength and high ductility. |
| |
| Keywords: | ferritic steel powder metallurgy phase transformation bi-modal microstructure mechanical property |
| 本文献已被 CNKI 维普 ScienceDirect 等数据库收录！ |
|
