HRB500E抗震钢筋中钛化物析出热力学分析

doi:10.13228/j.boyuan.issn0449-749x.20190326

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Abstract The study of the existence of titanium compounds in liquid phase and solid phase during the solidification of molten steel has an important influence on the properties of solid phase structure, and the second phase precipitation played the role of grain refinement. In order to analyze the precipitation law of TiN, TiC and Ti(C,N) precipitate in HRB500E aseismic steel bar, the thermodynamics of TiN, TiC and Ti(C, N) precipitates were calculated. The results show that TiN and TiC cannot precipitate in the homogeneous state of molten steel, TiC_0.19N_0.81 precipitates at the temperature of 1 843 K; TiN has thermodynamic conditions for precipitation during solidification because of the enrichment of Ti and N at the solidification front with a temperature of 1 745 K; TiN and TiC particles have thermodynamic properties for precipitation in solid austenite; while TiC precipitates at a lower temperature than TiN,TiC particles precipitation in ferrite.

Key words： seismic steel titanium nitride titanium carbide titanium carbonitride precipitation thermodynamics

Received: 22 July 2019

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	Articles by authors
	ZENG Ze-yun
	LI Chang-rong
	LI Zhi-ying
	LIU Zhan-lin
	LI Zheng-song
	ZHAI Yong-qiang

Cite this article:

ZENG Ze-yun,LI Chang-rong,LI Zhi-ying等. Thermodynamic analysis of titanium precipitation in HRB500E seismic steel[J]. Iron and Steel, 2020, 55(5): 45-51.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20190326 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I5/45

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