直接热轧法制备Cu-P-Cr-Ni-Mo双相耐候钢

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Abstract Cu-P-Cr-Ni-Mo weathering steel, in which dual-phase microstructures can be obtained by directly hot-rolling, was developed through readjustment of alloy elements based on the composition of weathering steel 09CuPCrNi. The wide temperature range of ferrite precipitation in the continuous cooling transformation (CCT) diagram of the hot deformed austenite can be applied as cooling speed windows. And between the precipitation range of ferrite and the transformation range of bainite, a wide metastable-austenite range of 80℃ exists, which can be held as coiling windows. The bainite transformation also can be avoided during the coiling process for the enveloped bainite transformation range in the CCT diagram. Based on the CCT diagram of deformed austenite, dual-phase weathering steel Cu-P-Cr-Ni-Mo is produced through simulated continuous hot-rolling on Gleeble-3500 thermal simulator. The microstructure of the hot-rolled dual-phase weathering steel Cu-P-Cr-Ni-Mo under different conditions is characterized as irregular distribution of island-shaped martensite in the matrix of equiaxed ferrite grains.

Received: 10 October 2011 Published: 30 July 2012

PACS:

TG14211

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	Articles by authors
	ZHANG Chun-Ling
	SA Tai-Yong
	LIAO Bei

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ZHANG Chun-Ling,SA Tai-Yong,LIAO Bei. Dual-Phase Weathering Steel Cu-P-Cr-Ni-Mo Prepared by Directly Hot-Rolling[J]. Iron and Steel, 2012, 47(7): 84-88.

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http://www.chinamet.cn/Jweb_gt/EN/ OR http://www.chinamet.cn/Jweb_gt/EN/Y2012/V47/I7/84

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