METHOD FOR PRODUCING GEARS AND / OR SHAFT COMPONENTS WITH SUPERIOR BENDING FATIGUE STRENGTH AND PITTING FATIGUE LIFE FROM CONVENTIONAL ALLOY STEELS

摘要

A conventional aluminium killed alloy Steel for case hardening of gear(s) and/or shaft components consisting of 0.10 to 0.30 weight % Carbon, 0.15 5 to 0.35 weight % Silicon , 0.8 to 1.5 weight % Chromium , 0.6 to 1.5 weight % Manganese , 0.017 to 0.040 weight % Aluminium , and balance iron including impurities , produced by vacuum degassing and alike routes. Gear(s) and/or shaft components made by the above steel when treated by 10 Modified Carbonitriding followed by Hard Shot Peening process provide both superior bending fatigue strength and pitting fatigue life , capable of withstanding higher torque levels and speeds. Dated this 18th day of September 2003 15 MAHINDRA & MAHINDRA LTD. By their Advocates, Patent & Trade Mark Consultants 20 Shyam Sunder Iyer Patent Agent TAS & CO. 25 To, The Controller of Patents, The Patent Office at Mumbai 1 MAY 2004