流态床渗氮工艺的研究

本文对３Ｃｒ２Ｗ８Ｖ，Ｈ１３及３８ＣｅＭｏＡｌ钢在刚玉流态床中进行了渗氮工艺的研究。结果表明，氨气在２５％－６５％范围内变化时，对渗氮结果无明显的影响，在流态床中渗氮可减少工件表面化合物层的形成和加快渗氮的速度。采用脉冲渗氮方法可获得与非脉渗氮同样的效果，同时可降低耗气量。

Study on the Nitriding Process in the Fluidized Bed Furnace

The investigation of nitriding in the corundum fludized bed furnace was carried out. The tested steels are 3Cr2W8V,H13 and 38CrMoAl. The experiment result indicates that,the effect of the NH3/(N2+NH3)ration on the nitriding results is not obvious in the variation of 25% to 65% NH3 but nitriding in fluidized bed can reduce the compound zone and increase the nitriding rate. Fluid-pulse nitriding treatment can obtain the same results as those of conventional nitriding in a fluidized bed furnace, but gas consumption is effectively reduced.