Heat treatment process for bushing used in track of endless trac

Details Heat treatment process for bushing used in track of endless trac Heat treatment process for bushing used in track of endless trac

1989-05-12

1991-09-17

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Chemical-heat removing or burning of metal

148152, C21D 100

Patent

active

050492071

ABSTRACT:
A heat treatment process applicable to bushings used in tracks of endless track tractor comprises heating a bushing made of middle carbon low alloy steel material from the outer peripheral surface thereof until the inner circumferential surface thereof achieves a temperature range of Ac.sub.3 .ltoreq.T.ltoreq.Ac.sub.3 +50.degree. C. where T is the temperature in .degree.C. of the heated circumferential surface and Ac.sub.3 is the transformation temperature in .degree.C. of the steel. The heating is accomplished with an induction heating whereafter the steel is cooled from the outer peripheral surface, resulting in hardening the same along the entire thickness thereof. The treatment is followed by tempering of the steel.

REFERENCES:
patent: 3567529 (1971-03-01), Burtnett
patent: 4210468 (1980-07-01), McGee

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