Nb和Nb-V微合金化钢位错亚结构强化的X射线研究  

INVESTIGATION OF DISLOCATION SUBSTRUCTURAL STRENGTHENING IN Nb AND Nb-V MICROALLOY STEELS BY X-RAY

作　　者：孟庆恩[1] 徐温崇[1] 吕世琴[1] 孙福玉[1] 

机构地区：[1]钢铁研究总院

出　　处：《钢铁研究学报》1989年第3期65-71,共7页Journal of Iron and Steel Research

摘　　要：利用常规X射线线形分析方法,测量了Nb和Nb-V微合金化钢板材的横向(x),纵向(y),和轧面法向(z)三个方向的相干散射区尺寸。证实本实验所用钢种经控轧后的位错胞近似呈椭球形。根据孙福玉等人提出的关于控轧钢屈服强度理论估算公式中所规定的原则,并考虑位错分布组态对强化效果的影响,位错亚结构强化效应可表示为K_DR_ZD(?)^(-1/2)。对本实验钢种,位错亚结构强化系数K_d≈1。The size of coherent scattering zone in specimens along the three directions, the longitudinal (x) and transversal (y) as well as the normal of rolled plane (z), in Nb and Nb-V microalloy steel-plates was measured by using the conventional X-ray line profile analysis method. The experiment indicated that the dislocation cells are approximately elliptical shape in as-controlled-rolled steels. According to the principle involved in the equation given by Sun Fuyu et al for calculating the yield strength of Nb-...

关 键 词：亚结构 强化效应 强化系数 控轧 晶体不完整性 位错胞 微合金化钢 低合金钢 Nb-V NB 

分 类 号：TF4-55[冶金工程—钢铁冶金]