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1. MYPI 20082864 - METHOD OF INDUCTION HARDENING

Office
Malaysia
Application Number PI 20082864
Application Date 30.01.2007
Publication Number PI 20082864
Publication Date 01.08.2007
Publication Kind A
IPC
C21D 1/10
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
1General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
06Surface hardening
09by direct application of electrical or wave energy; by particle radiation
10by electric induction
C21D 1/18
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
1General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
18Hardening; Quenching with or without subsequent tempering
C21D 9/28
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
28for plain shafts
H05B 6/06
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
6Heating by electric, magnetic, or electromagnetic fields
02Induction heating
06Control, e.g. of temperature, of power
H05B 6/10
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
6Heating by electric, magnetic, or electromagnetic fields
02Induction heating
10Induction heating apparatus, other than furnaces, for specific applications
C21D 9/00
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
Applicants HONDA MOTOR CO., LTD.
Inventors MINEMURA, KAZUO
CHIKAZAWA, YUKIHIRO
Agents TIMOTHY SIAW YEAN HWA
Priority Data 2006024942 01.02.2006 JP
Title
(EN) METHOD OF INDUCTION HARDENING
Abstract
(EN)
LONG WORK (LW) OF FE BASED ALLOY WHILE BEING ROTATED AT A GIVEN ROTATION SPEED UNDER THE ACTION OF ROTATING CHUCKS (14A,14B) IS HEATED BY HIGH-FREQUENCY HEATING COIL (16) TO THEREBY ACCOMPLISH THE HEATING STEP. IN THE FIRST COOLING STEP AFTER TERMINATION OF THE HEATING, THE LONG WORK (LW) WHILE HAVING ITS ROTATION SPEED INCREASED IS BROUGHT INTO CONTACT WITH FIRST TO FOURTH CORRECTION ROLLERS (24A TO 24D), AND IN THAT STATE IS COOLED SO AS TO FALL WITHIN A TEMPERATURE RANGE OF PF TEMPERATURE OR BELOW TO OVER MS TEMPERATURE. THE TIME SPENT IN THE COOLING PREFERABLY RANGES FROM 5 TO 10 SEC. IN THE SUBSEQUENT SECOND COOLING STEP, THE ROTATION SPEED OF THE LONG WORK (LW) IS REDUCED, PREFERABLY SO AS TO BE EQUAL TO THAT AT THE HEATING, AND COOLING OF THE LONG WORK (LW) IS CONTINUED. FIG. 1