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研究了变形后冷却工艺对V微合金化以及不含V螺纹钢中纳米析出物的影响,在热模拟试验机上进行了变形后不同冷却工艺的试验,采用透射电镜和能谱仪对螺纹钢的析出物进行了观察和分析。结果表明,含V螺纹钢高温变形后直接空冷有利于细小的VC均匀析出,提供更好的析出强化效果;不含V螺纹钢高温变形后在650℃保温30 min有利于纳米级渗碳体的析出。研究结果为螺纹钢轧后冷却工艺的制定提供了理论依据。
The effect of post-deformation cooling on nano-precipitates in V-microalloyed and non-V-rebar was studied. The experiments on the different cooling processes after deformation were carried out on the thermal simulator. The effects of transmission electron microscopy and energy dispersive spectroscopy Precipitates were observed and analyzed. The results show that direct air cooling with high temperature deformation of V-rebar is conducive to the uniform VC precipitation, providing better precipitation strengthening effect; without V-rebar high temperature deformation at 650 ℃ for 30 min is conducive to nano-scale cementite Precipitation. The results provide a theoretical basis for the development of cooling technology after rebar rolling.