EP 4107296 A1 20221228 - METHOD FOR INDUCTIVE SURFACE HARDENING
Title (en)
METHOD FOR INDUCTIVE SURFACE HARDENING
Title (de)
VERFAHREN ZUM INDUKTIVEN RANDSCHICHTHÄRTEN
Title (fr)
PROCÉDÉ DE DURCISSEMENT DE SURFACE PAR INDUCTION
Publication
Application
Priority
- DE 102020104476 A 20200220
- EP 2021054327 W 20210222
Abstract (en)
[origin: WO2021165532A1] The invention provides a method for inductive surface hardening of a surface (2a) running around an annular component made from a hardenable steel, which method achieves even and uninterrupted hardening. To do this, a) a starting zone is brought to a hardening temperature by means of an inductor (1a, 1b, 3a, 3b) and is quenched by means of a spray (1c, 3c). Subsequently, b) the surface (2a) is hardened by means of a stationary inductor assembly (1) and a movable inductor assembly (1, 3), wherein the movable inductor assembly (3) is moved along the surface (2a) and, at the same time, the annular component (2) rotates about an axis of rotation (X) in order to move the surface (2a) to be hardened along the stationary inductor assembly (1), the speed (V2) of the movable inductor assembly (3) along the surface (2a) being greater than the circumferential speed (V1) of said surface. Then, c) an end zone (E) of the surface (2a) is hardened so that the at least one leading inductor (1a, 3a), which arrives first at the end zone (E), preheats the end zone (E), until the trailing inductor (1b, 3b) is located at the end zone (E) and the end zone (E) is fully heated to the hardening temperature. Finally, the fully heated end zone (E) is quenched by means of a spray (1c, 3c, 5).
IPC 8 full level
C21D 1/10 (2006.01); C21D 1/667 (2006.01); C21D 9/34 (2006.01); C21D 9/40 (2006.01)
CPC (source: EP US)
C21D 1/10 (2013.01 - EP US); C21D 1/667 (2013.01 - EP US); C21D 9/34 (2013.01 - EP); C21D 9/40 (2013.01 - EP US); C21D 2221/01 (2013.01 - US); Y02P 10/25 (2015.11 - EP)
Citation (search report)
See references of WO 2021165532A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2021165532 A1 20210826; CN 115151662 A 20221004; EP 4107296 A1 20221228; JP 2023508238 A 20230301; MX 2022010285 A 20220919; US 2023082585 A1 20230316
DOCDB simple family (application)
EP 2021054327 W 20210222; CN 202180015791 A 20210222; EP 21707672 A 20210222; JP 2022549476 A 20210222; MX 2022010285 A 20210222; US 202117801119 A 20210222