Tribological properties of laser surface texturing and molybdenizing duplex-treated stainless steel at elevated temperatures

• Published in: Surface & coatings technology Vol. 228; pp. S219 - S223
• Main Authors: Li, Jianliang, Xiong, Dangsheng, Wu, Hongyan, Zhang, Yongkang, Qin, Yongkun
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 15.08.2013; Elsevier
• Subjects: Applied sciences; Contact of materials. Friction. Wear; Cross-disciplinary physics: materials science; rheology; Double glow plasma surface alloying; Exact sciences and technology; high temperature; Laser surface texturing; Materials science; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; Physics; Surface treatments; Wear resistance; Wear resistance; Double glow plasma surface alloying; Laser surface texturing; Plasma; Temperature; Austenitic ferritic steel; Mechanical properties; Surface treatments; High temperature; Surface alloying; Stainless steels; Wear resistance, high temperature; Wear; Dual-phase steels; Duplex stainless steel; Tribology
• ISSN: 0257-8972; 1879-3347
• DOI: 10.1016/j.surfcoat.2012.06.002

Surface texturing can be used as the storage of solid lubricant. The stainless steel was first laser surface textured and then was molybdenized by double glow plasma alloying technology to improve its tribological properties. The friction and wear properties of texturing and molybdenizing duplex-treated steel from room temperature to 600°C were tested on a ball-on-disk tribometer. The hardness of stainless steel is increased from HV196 to HV480 after molybdenizing. The friction coefficient of textured stainless steel smeared with MoS2 powders decreases from 0.40 to 0.10 at elevated temperature after molybdenizing. The wear rates of texturing and molybdenizing duplex-treated steel are much lower than those of single textured steel at elevated temperatures due to the lubrication of oxides of molybdenum. ► A plasma surface alloying technology (molybdenizing) is combined with laser surface texturing. ► The hardness of surface texture is improved by molybdenizing. ► The height of bulges on textured surface is decreased by molybdenizing. ► Friction coefficient and wear rate of textured surface are reduced by molybdenizing.