AH70DBD低碳贝氏体钢性能不合格原因分析  

ANALYSIS ON THE CAUSE OF UNQUALIFIED PERFORMANCE OF AH70DBD LOW CARBON BAINITE STEEL

作　　者：柴垚 娄军魁[2] 蔺学浩 李伟[2] Chai Yao;Lou Junkui;Lin Xuhao;Li Wei(Anyang Iron and Steel Stock Co.,Ltd)

机构地区：[1]安阳钢铁股份有限公司技术质量处,河南安阳455004 [2]安阳钢铁股份有限公司

出　　处：《河南冶金》2022年第2期13-15,28,共4页Henan Metallurgy

摘　　要：针对安钢AH70DBD低碳贝氏体钢力学性能出现抗拉强度批量不合格的问题,通过对比轧制工艺,并利用直读光谱仪检测其化学成分,利用金相显微镜检测其金相组织,分析出性能不合的原因。结果表明:强度偏高性能不合的主要原因是板条贝氏体组织比例较高,在轧制工艺上很难实现组织比例的精确控制;强度偏低性能不合的主要原因是B含量控制不合格造成的,组织以强度偏低的粒状贝氏体为主。In view of the problem of unqualified tensile strength in the mechanical properties of AH70DBD low-carbon bainite steel of Anyang Steel, through comparing rolling process, using direct reading spectrometer to detect its chemical composition, and using metallographic microscope to detect metallographic structure, the causes of the poor performance are analyzed. The results show that the main reason for the high strength is the high proportion of bainite structure in lath, which is difficult to achieve the precise control in the rolling process;the main reason for the low strength is the unqualified B content control, and the microstructure is dominated by granular bainite with low strength.

关 键 词：贝氏体钢 抗拉强度 终冷温度 

分 类 号：TG142.15[一般工业技术—材料科学与工程]