Method and apparatus for quench hardening thin-walled, elongated

Details Method and apparatus for quench hardening thin-walled, elongated Method and apparatus for quench hardening thin-walled, elongated

1983-04-13

1984-08-28

Rutledge, L. Dewayne

Metallurgical apparatus

Having means for contacting a solid metalliferous material...

With heating means, e.g., flame contact

266124, 266127, 266129, C21D 110

Patent

active

044680104

ABSTRACT:
A method and apparatus of quench hardening to a desired depth the inner surface of an axially extending bore in an elongated, thin-walled workpiece having an outer, axially extending surface wherein the bore has a selected, uniform cross-sectional shape, which method and apparatus involves providing an inductor with an outer shape generally matching, but smaller than, the cross-sectional shape of the bore, supporting the workpiece with the axis entending vertically, energizing the inductor with a known frequency and at a selected power level, moving the energized inductor downwardly through the bore to inductively heat the inner surface progressively while applying no fluid quench to the inner surface, letting the workpiece cool and then moving the inductor upwardly through the bore to progressively heat the inner surface while progressively liquid quenching the inner surface immediately below and after the progressive heating operation.

REFERENCES:
patent: 2295272 (1942-09-01), Somes

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