含硼焊瓶钢连续冷却相变及组织性能研究  

Study on Continuous Cooling Phase Transformation of Boron- Containing Steel for Welded Gas Cylinder and Its Microstructure and Performance

作　　者：赵楠[1] 黄绪传[1] 魏宝民 ZHAO Nan;HUANG Xuchuan;WEI Baomin(Technology Center,Shanghai Meishan Iron&Steel Co.,Ltd.,Nanjing Jiangsu 210039,China)

机构地区：[1]上海梅山钢铁股份有限公司技术中心,江苏南京210039

出　　处：《上海金属》2022年第5期48-54,共7页Shanghai Metals

摘　　要：测定了含硼焊瓶钢的静态连续冷却转变曲线,并据其制定了合理的热轧工艺进行工业试制。结果表明:通过添加微量B元素,结合后段冷却的热轧工艺,可生产出具有良好力学性能的焊瓶钢。微量硼可提高钢的淬透性,推迟铁素体转变,有利于贝氏体的形成。后段冷却方式与微量硼的综合作用有效促进了等轴状铁素体的析出,减少了贝氏体转变量,降低了屈服强度,从而保证了含硼焊瓶钢的力学性能及成形性能。Static continuous cooling transformation curves of boron-containing steel for welded gas cylinder was measured, and based on this, the reasonable hot rolling processes were determined for the industrial trial-production. The results showed that the steel for welded gas cylinder with good comprehensive performance could be produced by adding a minute amount of boron in conjunction with the corresponding hot rolling process of the end sections cooling. The trace of boron element could improve the hardenability of the steel, delay the formation of ferrite, and promote the transformation of bainite. Moreover, the cooperative effect of the end sections cooling mode and the trace of boron effectively promoted the precipitation of equiaxed ferrite, reduced the amount of bainite transformation, and decreased the yield strength, thereby ensuring the mechanical properties and formability of the boron-containing steel for welded gas cylinder.

关 键 词：焊瓶钢 硼 显微组织 性能 连续冷却相变 

分 类 号：TG115[金属学及工艺—物理冶金]