(一)渗炭箱的改进 我们的渗炭箱是用8～10公厘厚的铁板焊接而成,形状是长方形,我们常用的尺寸(箱子内部的尺寸)是长=450公厘,宽=300公厘,高=850公厘(对特殊的工作件则依工作件的形状临时决定)。加图1的形状,这样的箱子有两个 缺点,第一、箱子烧 过十五至二十次左右 就向箭头方 (A) the improvement of the inflatable box Our infiltration of carbon box is made of 8 to 10 mm thick welded iron plate, the shape is rectangular, our common size (box size) = 450 mm long, wide = 300 mm, height = 850 mm (for special work pieces according to the shape of the work piece tentative decision). Plus the shape of Figure 1, this box has two drawbacks, first, the box burned fifteen to twenty times or so on the arrow side