650 Degree Celcius Annealing Tempering Heat
Treatment Faurnace Car Bottom Furnace for Crankshaft
1. Application
The heat treatment furnace is mainly used for processes such as
annealing, tempering, quenching, normalizing, etc.
The RT3-320-6 electrical bogie hearth furnace is mainly
used for annealing and tempering processes of carbon steel,
alloy steel crankshaft.
2.Main Technical Parameters
| No. | Item | Technical Parameters |
| 1 | Rated power | 320KW+5% (1-100%) adjustable |
| 2 | Power supply |
480V, 3P, 60Hz; single phase voltage:110-120V |
| 3 | Rated temperature |
650℃ (normal working temperature:500-600℃) |
| 4 | Empty furnace temperature rise speed | ≤1h heating up to 500℃ |
| 5 | Control zone | 3 zones |
| 6 | Effective working size | 5200×1800×1200mm(L×W×H) |
| 7 | Overall size |
5900×2700×2650mm(L×W×H) The length required for the bogie inside and outside movement is 12800mm; The height including the fan motor: 3150mm; The height including the door frame: 4400mm; |
| 8 | Heating element connection | Ｙ |
| 9 | Temperature uniformity | ±8℃ |
| 10 | Temperature measurement accuracy | ±2℃ |
| 11 | Empty furnace power consumption | ≤18% |
| 12 | Temperature control method |
SCR (customized pressure resistant type) ; PID regulator; Huibang temperature controller (customized) with over temperature alarm; 7 inch color screen paperless recorder to record the temperature rise curve (customized) |
| 13 | furnace surface temperature rise | ＜40℃ |
| 14 | Heating element | 0Cr25AL5 (strip) (customized 480V) |
| 15 | Bogie surface plate | CrMnN heat resistant steel, 30mm thick |
| 16 | Loading method | Product loaded on the bogie, and then bogie moves into the furnace |
| 17 | Furnace lining | Standard Refractory fiber |
| 18 | Furnace door opening method | 2ton electric hoist up-down, sealed by spring (customized 480V) |
| 19 | Bogie moving method | By 5.5KW cycloidal pin gear speed reducer moves in and out of the furnace (customized 480V) |
| 20 | Circulating fan |
4KW air cooling fan, 3sets; Each fan flow: 5500m3/h; Air pressure: 1200Pa (customized 480V) |
3. Structural Introduction
The RT3-320-6 bogie hearth furnace is mainly comprised of
furnace body, lining, furnace door and door lifting mechanism,
furnace door compression mechanism, bogie and drawing mechanism,
seal between furnace body and bogie, heating element and fixed device ,
furnace temperature automatic control system.
lining
The high temperature bogie hearth furnace body is built with an all-fiber system.
The lining material used is quality aluminum fibers fixed by round steel parts.
The aluminum fibers are pre-compressed into blocks (compression gravity:
≥230Kg/m3 ) and then fixed to the furnace body by round stainless steel parts.
This refractory lining structure has the advantages of low heat conductivity,
strong anti-shock capacity, and anti-erosion. The lining has a total thickness of
260mm. The silicate aluminum fiber resists a maximum temperature of 100℃.
Hot air circulating system:
The heat treatment furnace is mainly comprised of three axial flow fans in the furnace.
The heat emitted by the heating element is evenly blown to the effective working area
by the circulating fan through the wind guide plate. The air guide plate is made of 1Cr18Ni9,
and the fan and shaft are made of 1Cr18Ni9Ti. In order to ensure the normal use of bearings,
the cooling method is air cooling.
