Major Components

Heat treatment

History

Year
Material reform
Surface strengthening
Component hardening
1955
Continuous quenching and tempering furnace
Gas carburizing furnace
 
1957
 
Continuous gas carburizing furnace
Induction hardening
1958
Continuous normalizing furnace
 
 
1964
 
Carburizing and nitriding furnace
Automatic induction hardening machine
1965
 
 
Multi-axis automatic induction hardener
1968
No oxidation quenching and tempering furnace
 
 
Ausforging
1969
Quenching oil for friction stabilized coating
 
 
1970
 
CO2-meter atmosphere controlled carburizing furnace
 
1973
 
Gas soft nitriding furnace
 
1977
Control cooled forging
 
 
1981
 
O2-sensor atmosphere controlled carburizing furnace
High-frequency plug quenching equipment
1984
 
 
Chilled camshaft through surface re-melting by tungsten inert gas arc
1987
Roller-hearth-type quenching and tempering furnace (at Honsha Plant)
High hardness shot peening for hypoid gear (at Tsutsumi Plant)
Induction hardening for SMnB steel rear axle shaft (at Motomachi Plant)
Vacuum sintering furnace (at Kinuura Plant for ABS sensors)
Mesh-belt-type nitrogen based sintering furnace (at Kinuura Plant)
Roller-hearth-type annealing furnace (at Kinuura Plant)
1988
Rotary sintering furnace (at Honsha Plant for V6 con rod)
Press tempering (at Kinuura Plant)
Full automatic crankshaft induction hardening machine
Gas firing heat treatment furnace

Trichloroethylene use ended as a cleaner before carburizing

High-toughness micro-alloyed steel chassis parts (knuckles, etc.)
Ion nitriding (at Kinuura Plant)
1989
Mesh-belt-type nitrogen based sintering furnace (at Miyoshi Plant)
 
High-precision 2-face induction hardening for 4WS rack bar (at Miyoshi Plant)
High-strength micro-alloyed steel crankshaft (at Honsha Plant)
1990
Combustion degreasing furnace
Central supervision control system for continuous carburizing furnace (at Honsha and Myochi plants)
 
Vacuum soft nitriding furnace (at Kinuura Plant)
1991
 
Internally converted-type continuous gas carburizing furnace (at Myochi Plant)
Crankshaft induction hardening machine (at TMMK)
Laser cladding valve seat
ABS solenoid electron beam quenching (at Hirose Plant)
1993
Vacuum degreasing furnace
Low distortion decompression boiling quenching for A/T Gear (at TMH)
Induction hardening equipment (at TAP)
Separate-room-type carburizing furnace (at Toyota Autoparts Philippines [TAP])
Die-less corrugate tube processing (at Myochi Plant)
High hardness shot peening for hypoid gear (at Honsha Plant)
Adopt heat treatment distortion simulation "HEARTS"
1994
 
 
Corrugated-type aluminum oil cooler (at Motomachi Plant)
1995
High-strength micro-alloyed steel con rod
 
Line-coil-type induction hardening for power steering pinions (at Miyoshi Plant)
Sintered VVT cam pulley with resin impregnation (at Kinuura Plant)
1996
Re-generation burner for heat treatment furnace (at Miyoshi Plant)
High-precision soft nitriding steel for cold forging (at TMH)
 
1997
 
TiN coating facility constructed (at Tahara Plant)
Torque converter (T/C) vacuum brazing (at TMH)
1998
 
Batch-type carburizing furnace (at Tianjin Fengjin Auto Drive Parts [TFAP])
Hot rolled starter gear processed on single-piece cast iron flywheel (at Aisin-Takaoka)
Nitrosulphurizing and chromium-nitride coating (for D4 pump)
1999
 
New high-hardness shot peening and 2-stage shot peening (at Kinuura Plant)
Wide-angle joint CVJ (at Miyoshi Plant)
2000
 
Electroless nickel-phosphate hard plating (at Motomachi Plant)
Heat treatment distortion simulation "Deform-HT"
2001
 
High-temperature decompression-type continuous carburizing/ quenching/ tempering furnace (at Kinuura Plant)
 
2002
Roller-hearth-type no oxidizing quenching/tempering furnace with vacuum purge rooms (at Miyoshi Plant)
Global standard continuous gas carburizing furnace (at TMMP)
Temperature control system for induction tempering (at Myochi Plant)
2003
Mesh-belt-type sintering furnace (at TMMP)
Solution ageing and gas nitriding for CVT hoop (at CVTEC)
Camshaft induction hardening equipment (at Kamigo Plant and TMMIN)
Mesh-belt-type and forged-normalizing furnace (at TMMP)
High-precision induction hardening equipment for crankshaft fillet (at Kamigo Plant)
Small rotary furnace for solution ageing treatment of aluminum-forged knuckles (at Motomachi Plant)
2004
 
 
Induction hardening equipment (at Toyota Kirloskar Auto Parts [TKAP])
2005
 
 
T/C vacuum brazing (at Toyota Motor Tohoku)
Induction hardening equipment (at TKAP)
Ravigneaux ring gear induction hardening equipment (at TMH)
2006
Roller-hearth-type annealing furnace (at Miyoshi Plant)
Multi-cell-type decompression carburizing furnace (at Honsha Plant)
Quality measurement technology for induction hardening developed
Roller-hearth-type sintering furnace (at Miyoshi Plant)
Internally converted-type continuous gas carburizing furnace (at Myochi Plant)


Roller-hearth-type continuous gas carburizing furnace with all chamber doors attached (at Kinuura Plant)
2008
In-line and multi-chamber forged-normalizing equipment (at Kinuura Plant)
Vacuum heated gas quenching furnace, nitride quenching furnace and normalizing furnace for VLC (at Miyoshi Plant)
Magnetic field analysis simulation "J-MAG"
Roller-hearth-type sintering furnace (at Kinuura Plant)
2009
Normalizing furnace for reactor core (at Miyoshi Plant)
Roller-hearth-type continuous gas carburizing-furnace with doors on all chambers, combined with high-pressure gas and oil cooling furnace (at Honsha Plant)
 
Continuous gas carburizing furnace (at Myochi Plant)

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