一般工厂的模具热处理多采用箱式炉加热.箱式炉加热容易产生较厚的氧化层.氧化层和脱碳影响了工件的表面质量和尺寸精度.有些厂采用木炭装箱保护加热,这样虽然能减少氧化、脱碳,但是,装炉出炉不方便,保温时间延长,达不到节能效果.我厂采用4%硼酸酒精溶液涂刷模具表面保护加热,使用效果很好. General factory mold heat treatment using box-type furnace heating.Chassis furnace heating prone to thicker oxide layer.Oxidation and decarburization affect the surface quality and dimensional accuracy of the workpiece.Some plants use charcoal packing protection heating, so although Can reduce oxidation and decarburization, however, it is inconvenient to put out the furnace and prolong the holding time, which can not reach the energy-saving effect.Our factory uses the 4% boric acid alcohol solution to brush the surface of the mold to heat and protect, and the effect is very good.