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电工纯铁的磁性退火通常是在真空或氢气介质中进行,对许多中小型厂而言,目前还不具备这种条件,这里介绍一种在中性介质中保护密封退火的方法。一、准备工作根据零件的几何尺寸,选用带有密封槽的大小箱子(见图1),建议大箱尺寸为250×250×300mm,小箱尺寸为70×70×120mm。大小箱子均用Cr13型不锈钢制作。箱子表面不允许有氧化皮或其它污物存在。小箱内外表面均要进行喷砂处理。大小箱的焊缝必须致密,以渗水法检查是否漏气。密封槽用石英砂填实。装箱用的填料为干
Magnetic annealing of electric pure iron is usually carried out in a vacuum or hydrogen medium. For many small and medium-sized factories, this condition is not presently available. Here, a method of protecting the sealing anneal in neutral medium is described. First, the preparation work According to the geometric dimensions of the parts, the size of the box with a sealed tank (see Figure 1), the recommended size of a large box 250 × 250 × 300mm, small box size of 70 × 70 × 120mm. Size boxes are made of Cr13 stainless steel. Box surface does not allow the oxide scale or other dirt exists. Inside and outside the small box should be sandblasted. The size of the weld box must be dense, seepage law to see if leakage. Seal groove filled with quartz sand. Packing stuffing is dry