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HEAT TREATMENT

Car-bottom heat-treating furnaces

The effective cooling and heating impulse system is made on the basis of the highspeed gas burners which are equipped with the electric lighting, flame control and built-in into tuyeres for cooling air supply.
Lining is made of modern fiber and ceramic low-inertia refractory and heat-insulating materials.
The heating automation facilities system provides conducting the cooling and heating mode under the specified program, stabilization the furnace heating duty in terms of energy saving algorithms.

Dimensions, m
 3,2õ8 3,9õ10,2
Hearth area, m 2
 25,6 39,7
Metal heating temperature, °C
 1000
Weight of charge, t
 100 180
Fuel
 Natural gas
Temperature difference, °C
 ±5
Purpose
 Anneal, tempering, normalizing with air blasting

Heat-treating vertical furnaces

Purpose:
N2 46, 47, 48, 50
Hardening of rotors, semi -rings; tempering of hot large work and back up rolls after hardening by power current.
Ns 51, 52
Final heat treatment of hot composite rolls surfaced with HCr layer.

Dimensions of workspace, DxH, m
 ¹ 46, 47, 48, 50 ¹51,52
2,6õ8
3,2õ8 ¹50
 2,6õ10
Maximum weight of charge taking into account auxiliaries, t
 50
Max. temperature
 1150

Temperature nonuniformity 100...400°C
400...1150°C

±10
±5
Lining
 Ceramic fiber Parok Finland; Keratech, Czechia
Burners
 Impulse, Kramshreder
Automation system
 Siemens

Furnace for cold work rolls low-temperature tempering

Purpose:
Cold work  rolls tempering  after induction hardening.

Chamber 1

12 rolls (Dbarrel, äî 600 ìì)
8 rolls (Dbarrel, îò 600 ìì)
Chamber 1 6 rolls (Dbarrel, äî 500 ìì)
4 rolls (Dbarrel, îò 600 ìì)
Chamber 3, 4, 5 6 rolls (Dbarrel, äî 600 ìì)
4 rolls (Dbarrel, îò 600 ìì)

Preheating chamber

1 rolls (Dbarrel, äî 850 ìì)

Operating temperatures range,°C

80...300

Temperature nonuniformity, °C

±2,5

Lining

ceramic fiber Parok, Finland Keratech, Czechia

Burners

Impulse, Kramshreder

Automation system

Siemens

 

 

Quenching and tempering shaft furnaces

Purpose:
Heating for quenching, normalizing, tempering.

Smelting chamber dimensions, D x H, m
 2,1õ4,5
2,7õ4,5
Maximum weight of charge, t
 34,6
Operating temperature range, °C
 250...1050
150...1050
Operating temperature range, °C
 ±5
Lining
 Ceramic fiber
Burners
 Impulse,
Kramshreder
Germany
Automation system
 Siemens


 

 

Car-bottom heat-treating furnaces

Preheating and tempering of backup rolls manufactured as per differentiated heat treatment technology.

Dimensions of furnace space
LxBxH, m
 8,5õ4,2õ2,7
Maximum weight of charge, t
 180
Maximum temperature, °C
 1000
Temperature spread, °C
 ±7,5
Lining
 Ceramic fiber, fiber fireclay material
Automation facilities
 Siemens

 

High-speed heating furnace

Purpose
High-speed heating of back-up rolls barrel surface layers.

Dimensions of furnace space, D x L, mm
 2800x2170
Maximum weight of charge, t
 60
Maximum speed of heating, °C/hr 800
Maximum temperature, °C
 1000
Temperature spread, °C
 ±2,5
Lining Ceramic fiber
Automation facilities
 Siemens

 

Spray units

ÑÏÐÅÉÅÐÍÛÅ ÓÑÒÀÍÎÂÊÈ ¹1, ¹2

SPRAY UNIT NO. 1.
Back-up and work rolls hardening for obtaining specified hardness and mechanical properties of necks and barrel

SPRAY UNIT NO. 2.
Hardening of back-up roll barrel after highspeed heating in highspeed heating furnace with the purpose of obtaining the specified hardness on the surface and at depth of the hardened layer

 
 

Spray unit No.1

Spray unit No.2
Purpose Back-up and work rolls hardening for obtaining specified hardness and mechanical properties of necks and barrel Hardening of back-up roll barrel after highspeed heating in highspeed heating furnace with the purpose of obtaining the specified hardness on the surface and at depth of the hardened layer
Rolls dimensions:
    

barrel diameter, mm

barrel length, mm

total length, mm

up to 1600

up to 2500

up to 8000

up to 1600

up to 2030

up to 8000
Max. consumption of water, cu.m/hr
 up to100 up to 200
Obtained hardness HSD on:
 38-50 55-75
Hardness spread, HSD
 up to 3 up to 3