Localized induction heating for residual stress optimization

Details Localized induction heating for residual stress optimization Localized induction heating for residual stress optimization

2008-01-22

2011-12-13

Yang, Jie (Department: 1733)

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

C148S660000, C148S320000

Reexamination Certificate

active

08075714

ABSTRACT:
An apparatus for the heat-treating of a heat-hardenable steel cruciform article having a weld seam includes a heating element to heat the weld seam to a point that an austenitic transformation occurs, and a quenching chamber to cool the weld seam, causing the formation of Martensite and an associated expansion. The quenching is rapid since slow quenching may allow a crystalline phase other than martensite to form. The apparatus may comprise rollers operable to convey the welded cruciform article through the apparatus at a speed such that the weld seam is subjected to heating for a predetermined heat time sufficient to cause a formation of martensite there within, and such that the heated portion reaches the quenching chamber and is quenched to create a substantial amount of martensite, e.g., an amount sufficient to cause expansion of the part.

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Abstract of JP 63310920 A (Dec. 1988).

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