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本文研究了Mn-V双相钢的变形特性.用计算机和C-J分析法计算和分析了试验钢的应力应变曲线,发现双相钢均匀变形阶段存在着双n特性.本文提出Ashby-Milciko综合理论描述双相钢的这种变形特性,即初始加工硬化阶段用Ashby加工硬化理论解释,在马氏体相开始变形后,用Mileiko复合材料强化理论来说明.按照这个理论,提高双相钢初始加工硬化速率及均匀延伸的途径是:在合理的马氏体体积分数的情况下,降低马氏体岛的直径和铁素体晶粒尺寸,尽可能使马氏体岛分布均匀并增加岛中板条马氏体量.
In this paper, the deformation characteristics of Mn-V dual-phase steel were studied.The stress-strain curve of the test steel was calculated and analyzed by computer and CJ analysis method, and it was found that the dual-phase steel has the double n-character in the uniform deformation stage.In this paper, Ashby-Milciko synthesis theory Describing this deformation behavior of duplex steels, the initial work-hardening stage is explained by the Ashby work-hardening theory, which is illustrated by the Mileiko composite strengthening theory after the martensitic phase has started to deform, according to which the initial processing of the dual-phase steel Hardening rate and uniform extension of the path is: in the case of a reasonable martensite volume fraction, reducing the diameter of martensite islands and ferrite grain size, as far as possible to make uniform distribution of martensite islands and island plate Article martensite volume.