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Materials Science and Engineering of Powder Metallurgy  2019, Vol. 24 Issue (1): 68-74    DOI:
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Effects of sintering temperature on microstructure and properties of high speed steel particles reinforced titanium matrix composites
ZENG Han, WU Hong, ZHOU Chengshang, LIU Yong, LIU Bin
Powder Metallurgy Research Institute, Central South University, Changsha 410083, China
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Abstract  The high-speed steel particle reinforced titanium matrix composites (HSSP/Ti-based composites) were prepared at 850~1 000 ℃ by spark plasma sintering (SPS) using M2 high-speed steel particles as reinforcements. The effects of sintering temperature on the microstructure, hardness and friction property of the composites were investigated. The results show that no pores or Ti-Fe intermetallic compounds are found in the interfacial transition layer between high-speed steel particles and titanium matrix, and the highest density of composites is 96.8%. A layer of carbide precipitates around the high-speed steel particles is founded at the sintering temperature of 850 ℃. The carbides disappear due to the diffusion of C phase with increasing sintering temperature. The W and Mo elements in the high-speed steel particles are enriched around the high-speed steel particles. The microhardness of the interface between the high speed steel particle and titanium matrix is relatively higher, and the microhardness of the titanium matrix sintered at 1 000 ℃ can reach 426.9 HV. The addition of high-speed steel particles is beneficial to improve the friction property of titanium. The wear mode of high speed steel particles reinforced titanium matrix composites is dominated by adhesive wear. The microhardness and wear resistance of the material both increase with sintering temperature increases.
Key wordstitanium matrix composites      high speed steel      SPS      microstructure      friction property     
Received: 09 July 2018      Published: 12 July 2019
ZTFLH:  TB331  
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ZENG Han
WU Hong
ZHOU Chengshang
LIU Yong
LIU Bin
Cite this article:   
ZENG Han,WU Hong,ZHOU Chengshang, et al. Effects of sintering temperature on microstructure and properties of high speed steel particles reinforced titanium matrix composites[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(1): 68-74.
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