气体渗氮疏松的影响因素及工艺改进  

Analysis on Porosity in Nitrided Case

作　　者：黄勇 

机构地区：[1]上海汽车变速器有限公司热处理厂,上海201807

出　　处：《热处理》2017年第2期37-40,共4页Heat Treatment

摘　　要：渗氮层中的疏松是一种渗氮缺陷,是由亚稳定铁氮化合物分解所至,会降低渗氮件的表面硬度、耐磨性和耐蚀性。疏松的产生与渗氮气氛的成分、渗氮工艺和渗氮件材料等因素有关。可根据这些因素采取相应的预防疏松的措施。Porosity in nitrided case is a defect producing in nitriding, arises from decomposition of iron nitride, and will cause the nitrided parts to offer lower surface hardness and worse resistances to wear and to corrosion. The formation of porosity is related to such factors as composition of nitriding atmosphere, nitriding process, material of part to be nitrided, etc. Some precautions against the porosity may be taken in the light of these factors.

关 键 词：渗氮 化合物层 疏松 氮势 

分 类 号：TG156.82[金属学及工艺—热处理]