780 MPa级冷成型用热连轧回火钢板的工业化生产

doi:10.13228/j.boyuan.issn0449-749x.20140078

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (0 KB) HTML (0 KB)
Export: BibTeX | EndNote (RIS)

Abstract Leveled steel plates were taken from hot-rolled strip steel with tensile strength of 780 MPa, which had been?widely?used?in building cranes and concrete pump trucks by cold forming. In the present work, the plates were tempered on a production line, and their mechanical properties, welding performance, cold forming property and microstructures were investigated. The results show that the strength and hardness of the steel increased significantly after the tempering, while the impact toughness and elongation rate decreased slightly. The difference between the mechanical properties in transverse direction and these in longitudinal direction decreased due to the tempering. The mechanical properties of the welded joints were improved showing reduced strength-loss after welding. The cold forming performance was also greatly improved. No significant change in phase constituents was observed due to the tempering, however, some ferrites grains were coarsened and their dislocation density decreased associated with increasing of cellular dislocation. Increased precipitates containing Ti, Nb, Mo were observed, resulting in the precipitation hardening.

Received: 18 February 2014 Published: 02 November 2014

PACS:

中图分类号：TG161

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	ZENG Bin
	XUN Xin-Jun
	LI Zhao-Dong
	YONG Qi-Long
	WENG Yu-Qiang

Cite this article:

ZENG Bin,XUN Xin-Jun,LI Zhao-Dong等. Industrial Production of 780 MPa Grade Tempering Steel Plates for Cold Forming and for Hot-Strip Rolling[J]. Iron and Steel, 2014, 49(11): 74-79.

URL:

http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20140078 OR http://www.chinamet.cn/Jweb_gt/EN/Y2014/V49/I11/74

[1]	FUNAKAWA Y. SHIOZAKI T. TOMITA K. YAMAMOTO T. MAEDA E. Development of High Strength Hot-rolled Sheet Steel Consisting of Ferrite and Nanometer-sized Carbides[J]. ISIJ International, 2004, 44(11): 1945-1951.
[1]	FUNAKAWA Y. SHIOZAKI T. TOMITA K. YAMAMOTO T. MAEDA E. Development of High Strength Hot-rolled Sheet Steel Consisting of Ferrite and Nanometer-sized Carbides[J]. ISIJ International, 2004, 44(11): 1945-1951.
[2]	Kagechika H. Recent Progress and Future Trends in the Research and Development of Steel[J]. NKK TECHNICAL REVIEW, 2003, 88: 6-9.
[2]	Kagechika H. Recent Progress and Future Trends in the Research and Development of Steel[J]. NKK TECHNICAL REVIEW, 2003, 88: 6-9.
[3]	Misra R D K. Nathani H. Hartmann J E. Siciliano F. Microstructural Evolution in a New 770 MPa Hot Rolled Nb–Timicroalloyed Steel[J]. Materials Science and Engineering A, 2005, 394: 339-352.
[3]	Misra R D K. Nathani H. Hartmann J E. Siciliano F. Microstructural Evolution in a New 770 MPa Hot Rolled Nb–Timicroalloyed Steel[J]. Materials Science and Engineering A, 2005, 394: 339-352.
[4]	Naoki N. Matthias M. Modeling of Microstructure Evolution during Hot Rolling of a 780 MPa High Strength Steel[J]. ISIJ. International, 2005, 45(1): 82-90.
[4]	Naoki N. Matthias M. Modeling of Microstructure Evolution during Hot Rolling of a 780 MPa High Strength Steel[J]. ISIJ. International, 2005, 45(1): 82-90.
[5]	黄庆渊. 颜鸿威. 潘永村. 杨哲人. 纳米级析出物强化热轧汽汽车用钢开发[J]. 矿冶, 2010, 53(4): 45-60.
[5]	黄庆渊. 颜鸿威. 潘永村. 杨哲人. 纳米级析出物强化热轧汽汽车用钢开发[J]. 矿冶, 2010, 53(4): 45-60.
[6]	Bracke L. Wispelaere N D. Ahmed H. Güng?r ? E. S700MC/Grade 100 in heavy gauges: industrialisation at ArcelorMittal Europe. Revue de Métallurgie, 2011,108: 323-330.
[6]	Bracke L. Wispelaere N D. Ahmed H. Güng?r ? E. S700MC/Grade 100 in heavy gauges: industrialisation at ArcelorMittal Europe. Revue de Métallurgie, 2011,108: 323-330.
[7]	Suikkanen P. Development and Processing of Low Carbon Bainitic Steels[D]. Linnanmaa: UNIVERSITY OF OULU, 2009.
[7]	Suikkanen P. Development and Processing of Low Carbon Bainitic Steels[D]. Linnanmaa: UNIVERSITY OF OULU, 2009.
[8]	雍岐龙. 钢铁材料中的第二相[M]. 北京: 冶金工业出版社，2006：359-385.
[8]	雍岐龙. 钢铁材料中的第二相[M]. 北京: 冶金工业出版社，2006：359-385.