当零件进行气体渗碳和碳氮共渗时,要随炉放入小圆试片(用铁丝挂着),用以检验渗层的深度和情况。一般操作者从炉中取出试片后立即淬入水中,使其迅速冷却,然后磨制、腐蚀、观察。这样得到的是淬火马氏体组 When the parts for gas carburizing and carbonitriding, to be included in the furnace with small round test strips (with wire hanging), to test the depth of the layer and the situation. General operator immediately remove the specimen from the furnace quenched into the water, it quickly cooled, and then grinding, corrosion, observation. The result is a quenched martensite group