在实验室试制了400、460 MPa级耐候钢,结果表明,试验钢屈服强度分别达到450、550 MPa,抗拉强度分别达到545、615 MPa;400 MPa级耐候钢的显微组织以铁素体为主,460 MPa级的以粒状贝氏体为主;400 MPa级的析出物主要是CuS2和TiN,主要强化机制是细晶强化、析出强化;460 MPa级的析出物主要是CuS2和(NbTi)CN,其主要强化机制是细晶强化、析出强化及相变强化.采用电子背散射EBSD技术分析了其晶体学取向,其晶粒间取向主要是大角度晶界.
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