Heat treatment for m-50 steel for bearing for high-temperature service

Abstract

Abstract PURPOSE:To refine contained metal carbides and to prolong the service life of a bearing for high-temp. service by subjecting an ingot of high-carbon alloy steel for bearing for high-temp. service to working at a specific forging ratio and then to soaking treatment at a specific temp. CONSTITUTION:At the time of manufacturing a bearing made of high-carbon alloy steel for use in main shaft, etc., of jet engine, etc., an ingot of a high- carbon alloy steel, etc., (e.g., 0.8C-4Cr-4Mo-1V) as a stock is worked at >=2 forging ratio (a ratio between the cross sectional area of the steel ingot and that of a forged product). Successively, soaking treatment is applied to the above at 1,150-1,220 deg.C for >=2hr, by which hard carbides, such as Cr, Mo, and V, are refined and the service life of the bearing for high-temp. service can be prolonged.

Inventors

• 👤 Kazuichi Tsubota
• 👤 坪田　一一
• 👤 Nobuhiro Hori
• 👤 堀　信弘
• 👤 Kaneaki Hamada
• 👤 濱田　兼彰

Bibliographic Details