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| Effect of Ti content on microstructure and performance of LF2 alloy |
| XUE Cheng-cheng1,2，WANG Li-min2，JIANG Ye-hua1，LIU Zheng-dong2，YANG Gang2 |
1. School of Materials Science and Engineering， Kunming University of Science and Technology， Kunming 650093，Yunnan， China
2. Institute for Special Steel， Central Iron and Steel Research Institute， Beijing 100081， China |
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Abstract Equilibrium precipitation phases of LF2 alloys were studied by using a thermodynamic Thermo-Calc software， microstructure and mechanical properties of LF2 alloys bearing different Ti content were studied by using scanning electron microscopy， transmission electron microscopy， subtle phase analysis and tensile test. The results show that γ′ phase is diffusely distributed in transgranular substantially spherical which size is about 20 nm. Laves phase precipitated with fibrous and block in the grain boundary. With the increase of Ti content of， the content of γ′ phase increased， Ti content has increased 0.92 percent， the quality percentage of Laves phase is 1.35 times of the original， the content of Laves phase increased， transforming fibrous into short clavate shape. With the increase of Ti content， the strength of LF2 alloys increases， strengthening effect of γ′ phase is relatively weak， but γ′ phase is still the main strengthening phase.
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Received: 31 July 2014
Published: 28 April 2015
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| [1] |
郑淼焱、章争荣、宋玲利等.21-4N气门钢高温压缩变形行为[J].材料热处理技术，2012，41(2)：46-48.
|
| [1] |
郑淼焱、章争荣、宋玲利等.21-4N气门钢高温压缩变形行为[J].材料热处理技术，2012，41(2)：46-48.
|
| [2] |
余式昌、吴申庆、燕纪全等.稀土对21-4N钢显微组织和力学性能的影响[J].机械工程材料，2005，29(6)：33-35.
|
| [2] |
余式昌、吴申庆、燕纪全等.稀土对21-4N钢显微组织和力学性能的影响[J].机械工程材料，2005，29(6)：33-35.
|
| [3] |
柏宇.Nimonic80A性能影响因素探讨[J].特钢技术，2008，14(56)：24-26.
|
| [3] |
柏宇.Nimonic80A性能影响因素探讨[J].特钢技术，2008，14(56)：24-26.
|
| [4] |
徐裕来.超超临界汽轮机叶片用高温合金Nimonic80A成分优化、微结构及其高温强化机理研究[D].上海：上海大学，2013：141-155.
|
| [4] |
徐裕来.超超临界汽轮机叶片用高温合金Nimonic80A成分优化、微结构及其高温强化机理研究[D].上海：上海大学，2013：141-155.
|
| [5] |
牛旭斐，程世长，朱云等. 700℃长时时效对LF2合金组织和高温拉伸性能的影响[J].机械工程材料， 2012，36(3)：39-42.
|
| [5] |
牛旭斐，程世长，朱云等. 700℃长时时效对LF2合金组织和高温拉伸性能的影响[J].机械工程材料， 2012，36(3)：39-42.
|
| [6] |
谌康，程世长，张军战等.大块含铌MC碳化物对LF2合金高温性能的影响[J].机械工程材料，2012，36(3)：18-21.
|
| [6] |
谌康，程世长，张军战等.大块含铌MC碳化物对LF2合金高温性能的影响[J].机械工程材料，2012，36(3)：18-21.
|
| [7] |
陈国良. 高温合金学[M]. 北京：冶金工业出版社，1988：5.
|
| [7] |
陈国良. 高温合金学[M]. 北京：冶金工业出版社，1988：5.
|
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| [2] |
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2015, Vol. 50 
