Effect of Liquid Salt Bath Nitrocarburizing on Mechanical Properties of Low-Alloy Sintered Steels

• Дата: 2018
• Автори: Serrai, S., Mechachti, S., Benchiheub, O., Boudebane, S., Fellah, M., Touhami, M.Z.
• Формат: Стаття
• Мова: English
• Опубліковано: Інститут металофізики ім. Г.В. Курдюмова НАН України 2018
• Назва видання: Металлофизика и новейшие технологии
• Теми: Физика прочности и пластичности
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/145945
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Effect of Liquid Salt Bath Nitrocarburizing on Mechanical Properties of Low-Alloy Sintered Steels / S. Serrai, S. Mechachti, O. Benchiheub, S. Boudebane, M. Fellah, M.Z. Touhami // Металлофизика и новейшие технологии. — 2018. — Т. 40, № 4. — С. 515-527. — Бібліогр.: 32 назв. — англ.

The purpose of this study is to produce Fe–2Cu–2Ni–0.7Mo–XC steels by means of the powder metallurgy at different sintering temperatures. The mechanical properties of sintered steels have recently reached a level equivalent to that of steels produced by other processes. The static and dynamic mechanical properties of parts made of sintered steel depend on density and microstructure. Many process parameters such as initial composition, alloying elements, atmosphere, time, sintering temperature, and nitrocarburizing influence the microstructure of steel parts. The compacts’ preparation involves powder mixing, cold pressing at 500 MPa, and sintering at 1250°C within the H2 atmosphere for 2 hours and 25 min. The influence of sintering temperature on both hardness and microstructure of the steel is investigated. In this study, sintered Fe–2Cu–2Ni–0.7Mo–XC-type steels are developed. The impact of nitrocarburizing on this structure is evaluated. Microscopy, SEM, and destructive testing are used for characterization of the sintered steels.