退火工艺对0.025C-0.326Mn钢组织、织构和力学性能的影响

doi:10.13228/j.boyuan.issn0449-749x.20190184

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Abstract In order to optimize the strength and deep drawability of low alloy steel,continuous annealing and salt bath annealing+over-aging process were adopted in this experiment. The effects of annealing temperature and over-aging temperature on microstructure,texture evolution and mechanical properties of 0.025C-0.326Mn steel were investigated. The results show that the increase of annealing temperature promotes the transformation of α texture to γ texture. The dispersed distribution of fine carbide particles hinders grain rotation,resulting in the re-emergence and increase of {113}<110> oriented grains,affecting the genetic evolution of {111} surface texture. The over-aging process promotes the precipitation of solid solution carbon in the ferrite after annealing,and purifies the ferrite. The increase in over-aging temperature improves the elongation of the material,wherein the elongation is preferably up to 36.9%. The r value of the continuous annealing sample is preferably 1.26,however,the salt bath annealing and over-aging process increases the r value to 1.39,and the latter tensile strength meets the requirements of 500 MPa grade.

Key words： annealing temperature aging temperature γ texture deep drawing property

Received: 28 April 2019

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	ZHOU Liu-tao
	PAN Hong-bo
	PAN Shuo
	WU Jie-wen

Cite this article:

ZHOU Liu-tao,PAN Hong-bo,PAN Shuo等. Effect of annealing process on microstructure texture and mechanical properties of 0.025C-0.326Mn steel[J]. Iron and Steel, 2020, 55(1): 93-100.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20190184 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I1/93

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