TiCN<sub>p</sub>增强高铬铸铁复合材料的制备与性能

doi:10.11896/cldb.21110021

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Abstract Taking TiCN_p and 20Cr high chromium cast iron powder as raw materials, reinforced high chromium cast iron with 10wt%—30wt% TiCN_p in this work was fabricated by supersolidus liquid phase sintering (SLPS) method. The influence of TiCN_p addition amount and sintering temperature on its densification, constituent phase, microstructure and mechanical properties have been investigated systematically. The results show that the relative density of the TiCN_p sintered through SLPS technique could reach to 97.5%, and it's phase composition containing TiCN, Cr₇C₃ carbides, martensite and a small amount of austenite. Besides, with the increment of TiCN_p addition amount, TiCN_p gradually forming a net distribution along the grain boundary. Meanwhile, more and more Cr₇C₃ carbides were precipitated and coarsened in the unmelted alloy matrix, which could lead to the linearly increment of the hardness of the TiCN_P but decreases their bending strength and impact toughness. And in general it is worth noting that the sintered composite with 30wt% TiCN_p has great mechanical properties with hardness of 87.8HRA, bending strength of 1 304 MPa and impact toughness of 2.35 J/cm².

Key words： composite TiCN_p PM high chromium cast iron mechanical property microstructure

Published: Online: 2023-07-10

CLC number:

TB331

Fund:National Natural Science Foundation of China (51574449).

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	Articles by authors
	ZHAO Jikang
	XIAO Ping'an
	GU Jinghong
	ZHONG Siyuan

Cite this article:

ZHAO Jikang,XIAO Ping'an,GU Jinghong, et al. Preparation and Properties of TiCN_p Reinforced High Chromium Cast Iron Composites[J]. Materials Reports, 2023, 37(13): 21110021-5.

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http://www.mater-rep.com/EN/10.11896/cldb.21110021 OR http://www.mater-rep.com/EN/Y2023/V37/I13/21110021

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