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通过光学显微镜、透射电镜、力学性能测试以及生产数据统计分析等手段分析了CSP工艺生产加Ti集装箱钢SPA-H时,成分及工艺对钢的显微组织及力学性能的影响。研究结果表明,钢中w(Ti)为0.02%～0.04%时,成品带钢晶粒尺寸可细化约1μm,且可观察到大量细小弥散的第二相析出物,可提高抗拉强度约30MPa左右;C、Ti的增加可提高钢的抗拉强度,且Ti的作用更加明显;S、N的存在会降低钢的抗拉强度,且N的作用更加明显;均热温度和终轧温度的适当提高,可提高钢的抗拉强度,而卷取温度对钢强度的影响则不明显。
The effects of composition and process on the microstructure and mechanical properties of steel were analyzed by optical microscopy, transmission electron microscopy, mechanical properties testing and statistical analysis of production data. The results show that when the content of w (Ti) in the steel is 0.02% ~ 0.04%, the grain size of the finished strip can be refined to about 1μm, and a large number of fine precipitates of second phase can be observed to increase the tensile strength 30MPa; C, Ti increase can increase the tensile strength of steel, and the role of Ti is more obvious; S, N will reduce the tensile strength of steel, and the role of N more pronounced; soaking temperature and finishing temperature The appropriate increase can improve the tensile strength of steel, and coiling temperature on the strength of steel is not obvious.