超高速激光金属沉积增材制造K648高温合金的显微组织与性能
Micro structure and properties of K648 superalloy additively manufactured by extreme high-speed laser metal deposition
王开明 1刘炜 2都东 3常保华 3刘冠 4胡永乐 2仝永刚 2张明军 2张健 2鞠江5
作者信息
- 1. 长沙理工大学汽车与机械工程学院,长沙 410114;清华大学机械工程系高端装备界面科学与技术全国重点实验室,北京 100084
- 2. 长沙理工大学汽车与机械工程学院,长沙 410114
- 3. 清华大学机械工程系高端装备界面科学与技术全国重点实验室,北京 100084
- 4. 中南大学机电工程学院,长沙 410083
- 5. 香港城市大学材料科学与工程系,香港 999077
- 折叠
摘要
采用一种新型的超高速激光金属沉积工艺以提高高铬高温合金的制造效率.分别使用透射电子显微镜、拉伸试验机、磨损试验机和电化学工作站对超高速激光金属沉积高铬K648高温合金的析出相生长行为、高温力学性能、耐磨性和耐腐蚀性进行研究,并与传统激光金属沉积工艺进行比较.结果表明,超高速激光金属沉积K648合金的析出相尺寸明显小于传统激光金属沉积工艺制备的K648合金,700 ℃下的高温强度更高,且具有良好的耐磨性和耐腐蚀性.总之,超高速激光金属沉积制造的K648高铬高温合金具有良好的综合性能.
Abstract
In order to improve the manufacturing efficiency of high-chromium superalloys,an innovative extreme high-speed laser metal deposition(EHLMD)process was used.The growth behavior of precipitated phases,high-temperature mechanical properties,wear resistance,and corrosion resistance of EHLMD K648 superalloy were investigated and compared with conventional laser metal deposition(CLMD)using transmission electron microscope,tensile tester,wear tester and electrochemical workstation,respectively.The results reveal that the precipitated phase size in EHLMD K648 superalloy is significantly smaller than that in CLMD K648 superalloy.Moreover,EHLMD K648 superalloy demonstrates higher tensile strength at 700 ℃,superior wear resistance,and excellent corrosion resistance compared to CLMD K648 superalloy.Consequently,the K648 superalloy manufactured through EHLMD technique exhibits favorable comprehensive properties.
关键词
增材制造/超高速激光金属沉积/K648高温合金/显微组织演变/性能Key words
additive manufacturing/extreme high-speed laser metal deposition(EHLMD)/K648 superalloy/microstructure evolution/properties引用本文复制引用
基金项目
National Natural Science Foundation of China(52205334)
Natural Science Foundation of Hunan Province,China(2022JJ40495)
Changsha Key Research and Development Project,China(kh2201275)
Changsha Municipal Natural Science Foundation,China(kq2202196)
Tribology Science Fund of State Key Laboratory of Tribology in Advanced Equipment,China(SKLTKF21B08)
出版年
2024
NETL
NSTL
万方数据