Nitriding of AISI 1020 steel: comparison between conventional nitriding and nitriding with cathodic cage

Materials Research

Rômulo Ribeiro Magalhães De Sousa²  Yuri José Luz Moura²  Pedro Américo Orsano De Sousa²  José Quinzinho Medeiros Neto¹  Thércio Henrique De Carvalho Costa¹  Clodomiro Alves Junior¹ 

[1] ,Federal Institute of Education, Science and Technology of Piaui - IFPI Laboratory Plasma - LabPlasma Teresina PI ,Brazil

关键词: cathodic cage;    plasma nitriding;    SAE 1020 steel;   

DOI  :  10.1590/S1516-14392014005000027

来源: SciELO

【 摘 要 】

Cylindrical samples of AISI 1020 steel were nitrided, using the techniques of conventional plasma nitriding and cathodic cage. In the latter, the samples are kept at floating potential, inside of a cage that works as a cathode and to shield the samples from the cathodic potential. A systematic study was conducted in order to evaluate the efficiency of this technique in the elimination of edge effect, in comparison with conventional plasma nitriding. In addition, another comparative study of the phases obtained using the conventional plasma nitriding and nitriding with cathodic cage was performed. Two metallic cages were used, one made of austenitic stainless AISI 316 and other one made of AISI 1020 steel, to prove the effect of deposition in nitriding with cathodic cage. The samples which were nitrided by this new technique had shown nitriding rates, crystalline phases, and microhardness, similar to those samples which were nitrided conventionally. However, it was possible to confirm the elimination of edge effect through the characterization by optical microscopy and by microhardness test along the samples surfaces. The samples were characterized by optical microscopy, microhardness tests and X-ray diffraction.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License