卷取温度对高Ti高强钢组织及性能的影响
发布时间：2019-01-27 11:25
【摘要】：利用扫描电镜(SEM)和透射电镜(TEM)等仪器研究卷取温度对高Ti微合金热轧高强钢显微组织和力学性能的影响。研究结果表明:随着卷取温度的升高,抗拉强度不断减小,屈服强度先增加再减小,伸长率不断增大。当350℃卷取时,试验钢拥有良好的综合力学性能,即抗拉强度为1 253 MPa,屈服强度为1 099 MPa,伸长率为13%,-20℃冲击功为102 J。这是因为该卷取温度略低于M_s点,试验钢显微组织由大量板条贝氏体(细小且交织)、少量马氏体和针状铁素体组成,这种显微组织能有效阻碍位错运动,从而提高强度。同时大角度晶界能够阻碍裂纹扩展,再加上板间的薄膜M/A,保证了材料的塑性和韧性。
[Abstract]:The effect of coiling temperature on the microstructure and mechanical properties of high strength hot rolled high strength steel with high Ti microalloy was studied by means of scanning electron microscope (SEM) and transmission electron microscope (TEM). The results show that the tensile strength decreases with the increase of the coiling temperature, and the yield strength increases first and then decreases, and the elongation increases continuously. When coiled at 350 鈩，
本文编号：2416215
[Abstract]:The effect of coiling temperature on the microstructure and mechanical properties of high strength hot rolled high strength steel with high Ti microalloy was studied by means of scanning electron microscope (SEM) and transmission electron microscope (TEM). The results show that the tensile strength decreases with the increase of the coiling temperature, and the yield strength increases first and then decreases, and the elongation increases continuously. When coiled at 350 鈩，
本文编号：2416215
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