Low Temperature Nitriding of Metal Alloys for Surface Mechanical Performance

Abstract

Metallic alloys are, by essence, ductile and stiff and can support loads without sudden rupture. This ductility becomes a disadvantage when applications require wear resistance. In this case, the hardening of the surface is required while retaining a core performance. Here, nitriding at low temperatures has proven to be beneficial and has potential. In fact, any phase transitions or unwanted compound precipitations that occur at higher temperatures have to be avoided as they would have a deleterious effect on the chemical homogeneity and mechanical properties. The present contribution summarizes the achievements made with such treatments on metallic alloys. We considered the most popular treatments, namely plasma, implantation, and gas nitridings.

Comparison of Nitriding Behavior for Austenitic Stainless Steel 316Ti and Super Austenitic Stainless Steel 904L

“…While there is a huge amount of literature on the nitriding process, with more than a dozen reviews summarizing the results for austenitic stainless steel [1,[12][13][14][15], there is almost no information on the phase formation in super austenitic stainless steel. The nitriding of steel UNS S31254 between 400 and 500 • C resulted in expanded austenite with a lattice expansion of 5-10% [16].…”

Solid Lubrication System and Its Plasma Surface Engineering: A Review

“…These free radicals undergo cross-linking and re-bond to form a network structure, thereby improving the surface performance of the material [21,22]. By using different plasma preparation techniques and solid lubrication material system components, the lubrication performance of the coating improved to meet the needs of special working conditions [23][24][25][26][27]. This article elaborates on the plasma preparation methods of lubrication coatings, introduces relevant solid lubrication coating systems, and prospects for the future development trend of solid lubrication coatings.…”