ALPHA-PHASE MICROCRYSTALLINE STRUCTURE OF IONITRIDING LAYER ON STEELS

TEM observation on the ionitriding layer was carried out on steels W18Cr4V,38CrMoAl and1Cr18Ni9Ti,and AES of elementary analysis was also made on the outer surface of ionitrid-ing layer of austenitic stainless steel.Perhaps due to the ion-bombardment effect,amicrocrystalline structure with texture was affirmed along surface of the ionitriding layer.Itmay be affected by cathodic sputtering and absorption that the atomic ratio of Cr/Fe in-creases and of Ni/Fe decreases on surface of nitriding layer on austenitic stainless steel1Cr18Ni9Ti,thus the α-phase microcrystalline structure occurrs.