基于2 250 mm热连轧产线开发低合金NM400耐磨钢卷板

doi:10.13228/j.boyuan.issn0449-749x.20200240

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Abstract In order to develop low-alloy high-strength thin-gauge wear-resistant coils with cost advantages,the current domestic advanced 2 250 mm hot continuous rolling mill process characteristics are adopted,after two-stage controlled rolling,three types of front concentration,front dispersion and segment cooling are used respectively controlled cooling process,systematically studied the effect of different cooling rates and cooling paths on the microstructure and mechanical properties of the product at the same start cooling temperature. The results show that the use of segmented cooling in the three cooling modes is more reasonable,and the specific key control process the intermediate temperature is 650 ℃,the waiting time is 10 s,the two-stage cooling rate is 40 ℃/s,and the coiling temperature is 170 ℃. The microstructure of products at room temperature is comprise mainly bainite and little of lath martensite and ferrite,which has the advantages of high strength and toughness and low yield ratio,the various performance meet the requirements of GB/T 24186—2009 and user conditions.

Key words： low alloy abrasion resistance steel NM400 TMCP cooling process microstructure and mechanical property

Received: 06 May 2020

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	Articles by authors
	SU Cheng
	FENG Guang-hong
	YUAN Xiao-ming
	WANG Shao-bing
	LI Zhao

Cite this article:

SU Cheng,FENG Guang-hong,YUAN Xiao-ming等. Development of low alloy NM400 wear-resistant steel strip based on 2 250 mm hot continuous rolling mill[J]. Iron and Steel, 2021, 56(2): 126-131.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20200240 OR http://www.chinamet.cn/Jweb_gt/EN/Y2021/V56/I2/126

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