Induktionshärtungsbehandlungsverfahren und Anwendung für einen Grossen Lagerring

Details

Veröffentlichungs-Nr.

EP4726061

Anmeldetag

8. Oktober 2025

Veröffentlichung

15. April 2026

Rechtsraum

EP

Abstract

A induction hardening treatment method for a large bearing ring, comprising 1) austenitizing step: heating the bearing ring by means of inductors (i<r1>, i<r2>, I<b>) so that surface temperature of the bearing ring reaches austenitizing temperature; and 2) martensitizing step: spraying a coolant on the bearing ring by means of showers (s<r>, s<b>) to cool the bearing ring rapidly, and to transform austenite in the structure of the bearing ring into martensite. Said austenitizing step is realized by simultaneously heating a raceway side surface (f<r>) and a raceway back side surface (f<b>) of the bearing ring by means of the inductors (i). Based on the above method, the present invention also provides an induction heating and quenching machine tool for a large bearing ring. The double-side heating not only allows the bearing ring to be hardened on both faces, but also can adjust a formation depth of a hardened layer below both side surfaces of the bearing ring. Said depth may reach as deep as a core portion of the bearing ring, thereby allowing the hardened layer to be formed throughout the entire thickness of the bearing ring, satisfying material performances required by different applications to the greatest extent.

Anmelder

Firma

Aktiebolaget SKF

Land

🇸🇪 Schweden