Effect of Ti(C,N) on Microstructure, Mechanical Properties and Oxidation Resistance of Ni-based Superalloys

被引：0

作者：

Yang Qingqing ^{[1
]}

Xiong Weihao ^{[1
]}

Zhang Guopeng ^{[1
]}

Huang Yuzhu ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, State Key Lab Mat Format & Dies & Moulds Technol, Wuhan 430074, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2012年 / 41卷 / 12期

关键词：

Ni-based superalloys; Ti(C; N) dispersion strengthening; microstructure; mechanical properties; oxidation resistance; TEMPERATURE; GAMMA;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ni-20Cr-4Mo-0.15C and Ni-20Cr-4Mo-0.15C-12.85TiC-3TiN (wt%) alloys were prepared by powder metallurgy method, in order to investigate the effect of Ti(C,N) on microstructure, mechanical properties and oxidation resistance at 800 degrees C of Ni-based superalloys. Results show that due to the addition of 12.85wt% TiC and 3wt% TiN, the formed Ti(C,N) particles dispersed within grains and at grain boundaries of austenite matrix, therefore austenite grains became fine. The density of supralloys decreased from 8.38 to 7.5 g/cm(3), the hardness increased from 1850 to 3430 MPa, and the tensile strength increased from 752 to 1192 MPa. In addition, the superalloys still exhibited good oxidation resistance in air at 800 degrees C, and the oxide scale formed mainly consisted of alpha-Cr2O3 and TiO2.

引用

页码：2127 / 2130

页数：4

共 9 条

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