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以304不锈钢为实验介质,采用离线热模拟实验研究了柱状坯料在感应线圈加热过程中的温度分布和变化规律。实验结果显示,在坯料径向、次表面和中心的温度在加热过程中先后超过表面;坯料纵向、两端温度高于中间段。分析表明随着坯料温度的升高,径向涡流梯度变小,导致在加热后期,温度最高区域从表面向内部移动,出现心部温度超过表面温度的现象;坯料两端因端部效应发生过热现象。
Using 304 stainless steel as the experimental medium, the temperature distribution and variation regularity of the columnar billet in the heating process of the induction coil were studied by offline thermal simulation. The experimental results show that in the billet radial, sub-surface and the center of the temperature in the heating process has surpassed the surface; billet longitudinal, both ends of the temperature higher than the middle section. The analysis shows that as the billet temperature increases, the radial vortex gradient becomes smaller, resulting in the phenomenon that the core temperature exceeds the surface temperature at the highest temperature in the late stage of heating, moving from the surface to the interior. The billet ends overheat due to the end effect phenomenon.