Production method for a vehicular endless track bushing

Details Production method for a vehicular endless track bushing Production method for a vehicular endless track bushing

1992-09-04

1993-11-23

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148574, 148575, C21D 110, C21D 118

Patent

active

052640531

ABSTRACT:
A production method for an endless track bushing wherein high-carbon low-alloy steel is selected as a bushing material, the bushing material is quench-hardened without pre-carburizing the bushing material, and then tempered. In the quench-hardening, the bushing material is induction-heated from an outside surface of the bushing material only so that an inside surface of the bushing material is heated to a temperature above and close to a transformation temperature of the high-carbon low-alloy steel, and then the heated bushing material is cooled from the outside surface of the bushing material only so that a residual compressive stress is produced at the inside surface of the bushing material when it has been cooled to an ambient temperature. The thus produced bushing has a high hardness throughout the entire cross section and a high toughness.

REFERENCES:
patent: 5032192 (1991-07-01), Tsuchiya et al.

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