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1. WO2007088825 - METHOD OF INDUCTION HARDENING

Publication Number WO/2007/088825
Publication Date 09.08.2007
International Application No. PCT/JP2007/051425
International Filing Date 30.01.2007
IPC
C21D 9/00 2006.01
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
C21D 1/10 2006.01
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 2006.01
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 2006.01
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 2006.01
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 2006.01
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
CPC
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, e.g. BY DECARBURISATION OR TEMPERING
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, e.g. BY DECARBURISATION OR TEMPERING
1General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
18Hardening
C21D 1/42
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, e.g. BY DECARBURISATION OR TEMPERING
1General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
34Methods of heating
42Induction heating
C21D 1/78
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, e.g. BY DECARBURISATION OR TEMPERING
1General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
78Combined heat-treatments not provided for above
C21D 11/00
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, e.g. BY DECARBURISATION OR TEMPERING
11Process control or regulation for heat treatments
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, e.g. BY DECARBURISATION OR TEMPERING
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
Applicants
  • 本田技研工業株式会社 HONDA MOTOR CO., LTD. [JP]/[JP] (AllExceptUS)
  • 峯村和男 MINEMURA, Kazuo [JP]/[JP] (UsOnly)
  • 近澤幸浩 CHIKAZAWA, Yukihiro [JP]/[JP] (UsOnly)
Inventors
  • 峯村和男 MINEMURA, Kazuo
  • 近澤幸浩 CHIKAZAWA, Yukihiro
Agents
  • 千葉剛宏 CHIBA, Yoshihiro
Priority Data
2006-02494201.02.2006JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) METHOD OF INDUCTION HARDENING
(FR) PROCEDE DE TREMPE PAR INDUCTION
(JA) 高周波焼入れ方法
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.
(FR)
Selon la présente invention, une longue pièce (LW) d'alliage à base de Fe est chauffée par une bobine de chauffage à haute fréquence (16), afin d'effectuer l'étape de chauffage, tout en étant tournée à une vitesse de rotation donnée sous l'action de mandrins rotatifs (14a, 14b). Lors de la première étape de refroidissement, une fois le chauffage effectué, la longue pièce (LW) vient au contact du premier au quatrième rouleau de correction (24a à 24d), tout en voyant sa vitesse de rotation augmentée, et elle est refroidie dans cet état de manière à ce que sa température baisse et se trouve dans une plage de température Pf ou une plage entourant la température Ms. Le temps de refroidissement est compris idéalement entre 5 et 10 sec. Lors de la seconde étape de refroidissement qui suit, la vitesse de rotation de la longue pièce (LW) est réduite, idéalement de façon à être identique à la vitesse lors du chauffage, et le refroidissement de la longue pièce (LW) continue.
(JA)
 Fe基合金からなる長尺ワーク(LW)を、回転チャック(14a、14b)の作用下に所定の回転数で回転させながら高周波加熱コイル(16)で加熱して加熱工程を行う。加熱を停止した後の第1冷却工程では、長尺ワーク(LW)の回転数を大きくしながら第1~第4矯正ローラ(24a~24d)に接触させ、この状態で、Pf温度以下~Ms温度超の温度域まで冷却する。この際の冷却時間は、5~10秒とすることが好ましい。次の第2冷却工程では、長尺ワーク(LW)の回転数を小さくし、好ましくは加熱時の回転数と同等として、長尺ワーク(LW)の冷却を続行する。
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