Publication number: 20230203630
Abstract: The invention relates to a wear-resistant steel with excellent surface quality, which is composed of C: 0.12-0.20%, Si: ?0.1%, Mn: 0.6-1.20%, Nb: 0.010-0.040%, V: ?0.01%, Ti: 0.010%-0.030, Al: ?0.04%, Ni: ?0.1%, Cu: ?0.1%, Cr: 0.10-0.40%, Mo: ?0.1%, B: 0.001-0.005%, Ca: 0.0010-0.0050%, P: ?0.010%, S: ?0.0015%, O: ?0.0012%, N: ?0.0035%, H: ?0.0002%, the balance is Fe, and the carbon equivalent CEV?0.4; PCM?0.25. The production process flow is: converter smelting->LF refining->VD or Rh high vacuum degassing->continuous casting->heating->rolling->shot blasting->quenching->tempering. The wear-resistant steel of the invention has better surface quality, and there are no surface defects such as air pit, inclusion, hemp pit and pressed iron oxide scale. The depth of surface spots caused by the peeling off iron oxide scale is ?0.1 mm, and the surface grinding of steel plate cannot be carried out. Based on element design, non-preheating welding and excellent toughness can be further realized.
Type:
Application
Filed:
April 9, 2020
Publication date:
June 29, 2023
Applicant:
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO., LTD
Inventors:
Jun LIU, Guozhong LI, Yang YANG, Xiaohong XU, Jinming WU, Pifeng MIAO, Guoqing XU, Xiaoshuang WANG
Publication number: 20210285069
Abstract: The present application relates to a steel for grade R6 offshore mooring chain for use in anchoring and mooring floating bodies with cathodic protection: the chemical composition are C 0.18˜0.24%, N 0.006˜0.024, P 0.005˜0.025, S?0.005, Si 0.15˜0.35, Mn 0.20˜0.40, Cr 1.40˜2.60, Ni 0.80˜3.20, Mo 0.35˜0.75, Cu?0.50, Al?0.02, Ti?0.005, V 0.04˜0.12, Nb 0.02˜0.05, Ca 0.0005˜0.004, O?0.0015, H?0.00015, the balance is Fe: the total content of alloy ?M=(Si+Mn+Cr+Ni+Mo+Cu), 3.4<?M?6.8; the total content of microalloy ?MM=(Ti+Al+Nb+V), 0.065??MM?0.194. The corrosion potential is adjusted to prevent hydrogen embrittlement caused by cathodic overprotection on the basic premise of maintaining the strength, toughness and low corrosion rate of the steel.
Type:
Application
Filed:
May 16, 2019
Publication date:
September 16, 2021
Applicant:
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO., LTD
Inventors:
Jiang YIN, Xuejun BAO, Zhenwei LIU, Yun BAI, Xiaohong XU, Ming ZHANG, Haidong FAN, Yao LI, Hongli LI, De CHEN, Guorong ZHU, Guoren HU, Tiehua YAO, Qiuhao GU, Yong CUI, Erxin HUANG, Xuewen LIU, LI Liangliang