【摘要】 本文综合比较了在中碳和低碳结构钢中改善其强韧特性达到超高强度钢水平的工艺措施和合金设计准则.系统地采用正交设计和回归分析方法,并运用微处理技术研究了Si-Mn-Cr-Ni-Mo-V系列低碳马氏体型超高强度钢的成分与性能的关系,得出了反应这一定量关系的回归方程.明确了碳和合金元素对这类钢强韧特性的主要贡献,从而得出该系列钢种的最优化成份范围.文中就典型成份钢种的强韧特性和组织结构关系,分析讨论了该系列钢种强韧化的本质,指出了发展低碳马氏体型超高强度钢的可能性和优越性.更多还原

【Abstract】 By comparison with medium and low-carbon martensitic steels, some design guidelines and technological processes for improving strength-toughness combinations are discussed. The structure property relations of low-carbon martensitic steels based on Fe-Si-Mn-Mo-V with Cr, Ni, Nb additions are investigated systematically by means of statistical regression analysis technique and electron computer calculation. The regressive equations are obtained by studying the relation of composition and their properties of the steels. The studying of contributions of carbon and alloy elements to strength and toughness performed the optimization ranges of compositions for these steels. From this, the effects of various structural features on the strength and toughness are discussed. This shows advantages of the development of ultrahigh strength steels through strengthening low-carbon martensitic steels with higher toughness better than the medium-carbon martensitic steels.更多还原