Carburized boron steels for gears

Details Carburized boron steels for gears Carburized boron steels for gears

1991-12-19

1993-01-12

Yee, Deborah

Metal treatment

Stock

Carburized or nitrided

C22C 3814

Patent

active

051786885

ABSTRACT:
A boron steel consisting of 0.18% to 0.35% C, 0.06% to 0.15%, Si, 0.50% to 1.00% Mn, 0.40% to 0.90% Cr, 0.01% to 0.05%, Al, 0.01% to 0.04% Ti, no more than 0.012% N, no more than 0.003% O, 0.0005% to 0.0030% B, and the balance Fe and impurities contained inevitably in manufacturing the steel, all percentages being based on the weight of the steel. The ratio of Ti to N is 3.4 to 6.0. The boron steel has an improvement in the reduction of heat-treatment distortion, surface oxidation in carburization and material cost, and also has superior hardenability, mechanical strength and fatigue strength.

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