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从理论和实验两方面研究了Nb,V微合金钢中析出相的应变诱导析出和粗化动力学。对应变诱导析出相粒子的尺寸分布和在变形后等温过程中粒子尺寸的变化规律作了探讨,得到了微合金钢中两种类型的应变诱导析出动力学曲线和考虑形变影响的粒子粗化动力学表达式。此外,探讨了析出相在三阶段控轧中的重要作用。结果指出,微量元素在α中的析出显,不仅影响析出强化效应本身,而且控制着位错,亚结构强化效应的发挥。讨论了复合添加微量元素的优越性。同时,用轧向和横向嵌镶块尺寸的比值Dγ/Dα代替位错密度,并找到一个能表征织构强比的参数,来估算材料的屈服强度,结果令人满意。
The strain-induced precipitation and roughening kinetics of precipitated phases in Nb and V microalloyed steels were studied theoretically and experimentally. The size distribution of precipitated phase and the variation of particle size during isothermal process after deformation were discussed. Two types of strain induced kinetic curves were obtained in microalloyed steel and particle coarsening power Learn expressions. In addition, the important role of precipitation phase in three-stage controlled rolling was discussed. The results indicate that the precipitation of trace elements in α not only affects the precipitation strengthening effect itself, but also controls the dislocation and sub-structure strengthening effect. The advantages of compounding trace elements are discussed. At the same time, the value of Dγ / Dα is used to replace the dislocation density and the parameter that can characterize the ratio of texture to strength is used to estimate the yield strength of the material. The result is satisfactory.