800MPa级低合金高强钢板屈强比影响因素  

Factors influencing yield ratio of 800 MPa grade HSLA steel plate

作　　者：杨建勋[1] 

机构地区：[1]莱芜钢铁集团有限公司技术中心,山东莱芜271100

出　　处：《金属热处理》2013年第3期52-55,共4页Heat Treatment of Metals

摘　　要：针对800 MPa级低合金高强钢板屈强比偏高的问题,借助光学金相显微镜、扫描电镜和透射电镜,对力学性能、组织结构与生产工艺参数间的关系进行了分析。结果表明,通过降低开冷温度、提高终冷温度以及降低回火温度等一系列措施,控制显微组织中各相合适的体积分数,使钢板屈强比由0.964降低至0.825。For high yield ratio of 800 MPa grade high strength low alloy steel plate, the relationships between mechanical properties, structure and production process parameters were analyzed by optical microscope, scanning electron microscopy and transmission electron microscopy. The results show that through a series of measures of reducing start cooling temperature, increasing final cooling temperature and reducing tempering temperature, controlling appropriate volume fraction of each phase in the microstructure, the yield ratio of the steel decreases from O. 964 to O. 825.

关 键 词：低合金高强钢 屈强比 开冷温度 终冷温度 回火 

分 类 号：TG142.1[一般工业技术—材料科学与工程]