优化成分设计以降低低合金高强度结构钢成本.pdfVIP

2016 年 6 月 向陶冶金 Jun. 2016 第24 卷第3 期 HENAN METALLURGY Vo l. 24 No.3 优化成分设计以降低低合金高强度结构钢成本 王翠娜黄重张大江石成刚 (安阳钢铁股份有限公司) 摘要 为降低板坯低合金高强度结构钢 Q345C 的成本，进行了优化Q345C 成分设计试验。 根据各元紫对强度的 贡献值及合金成本.降低钢中锺含盘0.30 %左右;加入散合金元素饥，使钢中饥含址控制在0. 025% 句 0.035% ;钢 中铝含B不再做要求，减少钙铁线的喂人盐。 结果表明:该成分体系能够降低铜中有害元素 P、 S 的含量;能够改善 铸坯中心偏析，铸坯角都未发现裂纹;冲击韧性和延展性街所提高，抗拉强度和屈服强度稍低于优化前的 Q345C 钢，钢板力学性能满足国标要求;品粒度与优化前相比差别不明显，带状组织有所减轻，优化成分设计后吨钢合金 成本降低了5.3 -8.0 元。 关键词 低合金高强度钢 Q345C 散合金化降成本 OPTIMIZE THE DESIGN OF THE COMPONENT TO REDUCE THE COST OF IDGH - STRENGTH LOW ALLOY STEEL Wang Cuina Huang Zhong Zhang Daj iang Shi Chenggang ( Anyang Iron and Steel Stock Co. Ltd ) ABSTRACf ln order to reduce lhe cost of high - slrength low alloy steel Q345C slab ,this paper carried out an experi- ment to optimize the composition of Q345C. According to the conlrihulion of each element to the strength and the cost of the alloy , the manganese content in steel decreased by O. 30% , added micr咽 alloying element vanadium into the steel , the con- tent of vanadium in steel is controlled in 0.025% - 0.035% , the aluminum content in the steel is no longer required , the feeding amount of calcium iron 白re was reduced. The results show that the composition system can reduce the content of harmful elements P and 5 in steel , can improve the center segregation of casting slab , no cracks are found in the comer of the slab , the mechani cal properties of steel plate meet the requirements of the national standard , st陀ngth is slighùy lower than the original steel Q345C , but impact toughness and ductility is better;