Sliding/rolling wear performance of plasma nitrided H11 hot working steel

• Published in: Tribology international Vol. 51; pp. 18 - 24
• Main Authors: BAKI KARAMIS, Mehmet, YILDIZLI, Kemal, CARKIT AYDIN, Gamze
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-07-2012; Elsevier
• Subjects: Applied sciences; Die steels; Discs; Disks; Exact sciences and technology; Friction, wear, lubrication; H11 steel; High speed tool steels; Hot working; Hot working steels; Ion nitriding; Machine components; Mechanical engineering. Machine design; Plasma nitriding; Sliding; Sliding/rolling wear; Steels; Tribology; Wear; Plasma nitriding; H11 steel; Hot working steels; Sliding/rolling wear; Adhesive wear; Sliding wear; Wear test; Plasma assisted processing; Rolling contact; Nitriding; Metal; Rolling wear; Experimental study; Dry friction; Surface hardness; Physical vapor deposition; Lubrication; Nitriding steel; Plasma deposition; Sliding friction; Tribology
• ISSN: 0301-679X; 1879-2464
• DOI: 10.1016/j.triboint.2012.02.005

H11 steel discs were tested by considering sliding/rolling friction under dry and lubricated conditions. The H11 discs were plasma nitrided at 500°C and 550°C for 9h. Wear tests were conducted at different slip ratios of 1.79%, 10.53% and 22.22%. The test loads were 100N, 150N and 200N. It was determined that plasma-nitrided H11 discs had a surface hardness of 1200–1400HV0.1. Plasma nitriding produced wear performance much higher than those of the un-nitrided but hardened samples. The wear mechanism of the plasma-nitrided discs was a mixture of adhesive wear, abrasive wear and plastic yielding.
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► This research is a good example for disc-on-disc test configuration. ► Wear performances of plasma-nitrided and untreated H11 discs are compared. ► The disc surfaces and subsurface properties are characterised. ► The research deals with pre-heating and subsequent plasma nitriding strategies. ► This study presents visual findings based on plasma nitriding and metallography.