摘要 |
The present invention provides a steel plate with high strength and abrasion resistance, having a Brinell hardness of >= HB 420. The components (wt%) thereof are: C: 0.205-0.25%, Si: 0.20-1.00%, Mn: 1.0-1.5%, P<=0.015%, S<=0.010%, Al: 0.02-0.04%, Ti: 0.01-0.03%, N<=0.006%, Ca<=0.005%,and at least one of Cr<=0.70%, Ni<=0.50%, and Mo<=0.30%, the balance being iron and inevitable impurities. The process for manufacturing the steel plate comprises heating a continuous cast billet or a steel billet at 1150-1250°C, then rolling in a recrystallization area and a non-recrystallization area, with the total reduction rate of >=70% and a final rolling temperature of >=860°C, then cooling with water to Ms-145 to Ms-185°C at Vmin~50°C/s and then cooling with air to room temperature. The steel plate thus obtained with a thickness of 6-25 mm has a structure of martensite + retained austenite (5-10%), a hardness of >= HB420, a yield strength of >= 1000MPa, an elongation of >=18%, and -40°C Akv of >= 27J. The steel plate has excellent cold bending performance, especially a significant TRIP effect during use of the steel plate, significantly increasing the abrasion resistance and meeting the relatively high requirements for abrasion resistant steel plate in related industries. |
申请人 |
BAOSHAN IRON & STEEL CO., LTD.;ZHANG, AIWEN;WANG, GUODONG;JIAO, SIHAI |
发明人 |
ZHANG, AIWEN;WANG, GUODONG;JIAO, SIHAI |