科技创新与应用2025，Vol.15Issue(17)：143-146,4.DOI:10.19981/j.CN23-1581/G3.2025.17.031
690MPa级大厚度海工钢低温韧性不合格原因分析及改进
吴海虹1
作者信息
- 1. 江苏沙钢钢铁有限公司,江苏 张家港 215625
- 折叠
摘要
Abstract
In view of the unqualified low-temperature toughness of 690 MPa grade large-thickness offshore steel,this paper analyzes the factors affecting the unqualified low-temperature toughness by studying the rolling process,chemical composition,mechanical properties,and metallographic structure of 690 MPa grade large-thickness offshore steel.The results show that the main reason for the failure of 690 MPa grade large-thickness offshore steel in low temperature impact is that the cooling rate at the center of the steel plate is low,the hardenability is insufficient,and a large amount of coarse granular bainite is produced.For this reason,optimization measures such as high reduction controlled rolling and secondary quenching were adopted to improve the low-temperature toughness of the steel plate and increase the performance pass rate.关键词
海工钢/低温韧性/粒状贝氏体/控制轧制/二次淬火Key words
offshore steel/low-temperature toughness/granular bainite/controlled rolling/secondary quenching分类
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吴海虹..690MPa级大厚度海工钢低温韧性不合格原因分析及改进[J].科技创新与应用,2025,15(17):143-146,4.
