Wear and Corrosion Resistance of Precipitation Hardening Stainless Steels with Niobium
Precipitation hardening stainless steels were developed in 1945 to meet the needs of the aerospace industry. These steels possess substitutional martensitic microstructures that can be hardened by precipitation. In this work, a steel with an alternative composition using Nb as a precipitate former was produced and compared with a traditional ph steel, PH13-8Mo steel in terms of wear and corrosion resistance. Optical microscopy reveals the presence of a lath type martensitic structure for both studied materials. Abrasion wear tests were pin-on-sandpaper analyzing the mass loss. Corrosion curves were obtained in natural sea water using polarization curves. The Nb proved to be an effective precipitate former reducing the wear when compared with PH13-8Mo. Polarization curves indicated that both steels undergo a passivation process followed by pit formation and yielded similar corrosion resistance.
stainless steel precipitation hardening wear corrosion
Casteletti,L.C. Fernandes,F.A.P. Lombardi-Neto,A. Picon,C.A. Totten,G.E.
Sao Carlos School of Engineering,EESC-USP,Sao Carlos,SP,Brazil AEROALCOOL,Franca,SP,Brazil Engineering School ofIlha Solteira,FEIS-UNESP,Ilha Solteira,SP,Brazil Portland State University,Department of Mechanical and Materials Engineering,Portland,OR,USA
国际会议
The Fourth Asian Conference on Heat Treatment and Surface Engineering(第四届亚洲热处理及表面工程大会)
北京
英文
80-83
2009-10-27（万方平台首次上网日期，不代表论文的发表时间）