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快速加热工艺虽已应用多年,但一般以经验为基础,操作不易掌握,热处理质量也不稳定,因此推广应用比较困难。本文通过实验,经传热计算和分析,对快速加热过程中模具表面与心部的温差、奥氏体平均碳浓度的变化进行了探讨。试图通过调节淬火加热工艺参数来控制模具的奥氏体平均碳浓度,以达到减少模具淬火变形的目的。 1.快速加热时模具温度变化为了准确掌握工件在炉内快速加热时的升温速度和内外温差,我们设计了由两块100×80×16mm的T8钢模板夹固两支φ3mm
Although rapid heating process has been used for many years, but generally based on experience, operation is not easy to grasp, heat treatment quality is not stable, it is more difficult to promote the application. In this paper, through experiments, heat transfer calculation and analysis, the change of temperature difference and austenite average carbon concentration between the mold surface and the heart during the rapid heating process are discussed. Trying to control the average austenite carbon concentration of the mold by adjusting the parameters of the quenching and heating process so as to achieve the purpose of reducing the mold quenching deformation. 1. Rapid heating mold temperature changes In order to accurately grasp the rapid heating of the workpiece heating rate and internal and external temperature difference, we designed two 100 × 80 × 16mm T8 steel template clamping two φ3mm