Influence of temperature in arc-activated plasma nitriding of maraging steel in solution annealed and aged conditions

被引：29

作者：

Fernandez de Ara, J. ^{[1
]}

Almandoz, E. ^{[1
]}

Palacio, J. F. ^{[1
]}

Fuentes, G. G. ^{[1
]}

Rodriguez, R. J. ^{[2
]}

Garcia, J. A. ^{[2
]}

机构：

[1] AIN, E-31191 Cordovilla, Spain

[2] Univ Publ Navarra, IMEM Dept, Pamplona 31006, Spain

来源：

SURFACE & COATINGS TECHNOLOGY | 2014年 / 258卷

关键词：

Maraging steel; Plasma nitriding; Aging; Wear resistance; Hardness; Corrosion; STAINLESS-STEEL; ELEVATED-TEMPERATURES; ION; RESISTANCE; MECHANISMS; FATIGUE; LAYERS; IRON; WEAR; RF;

D O I：

10.1016/j.surfcoat.2014.07.084

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Maraging alloys are a group of high performance steels that combine high strength and good fracture toughness. Their excellent combination of properties is due to their microstructure, formed by nanometer-sized intermetallic precipitates embedded in a ductile martensite matrix. Their hardening treatments consist of aging processes that are compatible with thermochemical treatments such as nitriding or nitrocarburizing. An arc-activated plasma nitriding technique has been used in this study to investigate the effect of simultaneous aging and ion nitriding of maraging steel grade 300 at temperatures from 450 degrees C to 510 degrees C. The paper compares the results obtained for solution annealed and aged hardened samples in order to verify the compatibility of both processes, aging and nitriding. Chemical composition and micro-hardness profiling, glancing incidence X-ray diffraction (GIXRD), metallographic tests, corrosion studies and wear resistance tests were carried out. The results demonstrate the feasibility of arc-activated ion nitriding to achieve significant improvements of the surface properties of maraging steels and to merge together thermochemical and aging processes, thus reducing their processing time and energy consumption. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：754 / 762

页数：9

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