Baoshan Iron & Steel Co., Ltd.

Aiwen Zhang

Sihai Jiao

Guodong Wang

Qingfeng Zhang

Xiangqian Yuan

Yushan Chen

The present invention relates to a high-strength high-toughness steel plate and a method of manufacturing the steel plate. The steel plate contains the following chemical compositions, by weight, C: 0.03-0.06%, Si&#x2266;0.30%, Mn: 1.0-1.5%, P&#x2266;0.020%, S&#x2266;0.010%, Al: 0.02-0.05%, Ti: 0.005-0.025%, N&#x2266;0.006%, Ca&#x2266;0.005%, and more than one of Cr&#x2266;0.75%, Ni&#x2266;0.40%, Mo&#x2266;0.30%, other compositions being Ferrum and unavoidable impurities. The finished steel plate, with a thickness of 6-25 mm, has a yield strength of &#x2267;700 MPa, an elongation A50 of &#x2267;18%, Akv at &#x2212;60&#xb0; C. of &#x2267;150 J and good cool bending property.

High-strength and high-toughness steel plate with yield strength of 700 MPa and method of manufacturing the same

The present invention provides a high-strength wear-resistant steel plate with Brinell hardness of &#x2267;HB420, comprising the following chemical compositions (by weight %) C: 0.205-0.25%, Si: 0.20-1.00%, Mn: 1.0-1.5%, P&#x2266;0.015%, S&#x2266;0.010%, Al: 0.02-0.04%, Ti: 0.01-0.03%, N&#x2266;0.006%, Ca&#x2266;0.005%, and at least one of Cr&#x2266;0.70%, Ni&#x2266;0.50%, Mo&#x2266;0.30%, other compositions being Ferrum and unavoidable impurities. Also provided is a method of manufacturing the wear-resistant steel plate has remarkable TRIP effect in use, improving substantially its wear resistance, thereby meeting the high demand for wear-resistant steel plates in related industries.

Ultrahigh-strength wear-resistant steel plate and method of manufacturing the same

A steel plate with a low yield ratio and high toughness. The steel plate comprises components of, by weight: C (0.05-0.08%), Si (0.15-0.30%), Mn (1.55-1.85%), P (less than or equal to 0.015%), S (less than or equal to 0.005%), Al (0.015-0.04%), Nb (0.015-0.025%), Ti (0.01-0.02%), Cr (0.20-0.40%), Mo (0.18-0.30%), N (less than or equal to 0.006%), O (less than or equal to 0.004%), Ca (0.0015-0.0050%), and Ni (less than or equal to 0.40%), a ratio of Ca to S being greater than or equal to 1.5, and the residual being Fe and inevitable impurities.

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Shanghai, China

Aiwen Zhang