Cu-NiAl纳米复合析出强化钢回火工艺

doi:10.13228/j.boyuan.issn0449-749x.20200254

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Abstract In order to study the microstructure and mechanical properties of Cu-NiAl nano co-precipitation strengthened steel tempered at different processes,OM and TEM were used to analyze the microstructure of the experimental steel tempered in the range of 300-650 ℃,and the mechanical properties were discussed. The results show that bainitic ferrite lathes began to coarsen and gradually transformed into equiaxial ferrite,and there were nanoscale precipitates in the matrix at tempering temperature 300-550 ℃. During tempering at 600-650 ℃,lath structure completely transformed to equiaxial ferrite,and nanometer precipitates gradually grew and coarsened. The optimum tempering temperature range for the Cu-NiAl nano co-precipitation strengthening steels was 550-600 ℃.The yield strength was 855-917 MPa,the impact energy tested at -40 ℃ is 77-86 J,and the comprehensive mechanical properties were good.

Key words： Cu-NiAl nano co-precipitation tempering temperature high-strength steel bainite recrystallization impact property

Received: 13 May 2020

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	Articles by authors
	KAN Li-ye
	YE Qi-bin
	TIAN Yong
	WANG Zhao-dong
	WANG Guo-dong

Cite this article:

KAN Li-ye,YE Qi-bin,TIAN Yong等. Tempering process of Cu-NiAl nano co-precipitation strengthened steel[J]. Iron and Steel, 2021, 56(2): 105-109.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20200254 OR http://www.chinamet.cn/Jweb_gt/EN/Y2021/V56/I2/105

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