Heat-treatment facilities: car bottom-type furnaces (1).

Differentiated heat treatment technology (2.1, 2.2)

(1) Purpose:
- heating for quenching and tempering of hot and cold work and back-up rolls;
- preheating and tempering of back-up rolls manufactured as per differentiated heat treatment technology

(2.1) HSHF – is high-speed heating furnace. Purpose: high-speed gas-flame heating of back-up rolls barrel surface layers.

(2.2) Purpose:
- unit No. 1 – Back-up and work rolls hardening for obtaining specified hardness and mechanical properties of necks and barrel
 - unit No. 2 – Hardening of back-up roll barrel after high-speed heating in high-speed heating furnace with the purpose of obtaining the specified hardness on the surface and at depth of the hardening layer

DescriptionValue
Dimensions of furnace space,
 L x B x H , m
8,5x4,5x2,913,5x4,5x4,2
Maximum charge weight, t170250
Maximum temperature, °С1000
Temperature spread, °С+ 7,5
LiningCeramic fiber,
ШВП
Automation systemSiemens
DescriptionValue
Dimensions of furnace
space, D x L, mm
2800 х 2800
Maximum charge weight, t70
Maximum heating speed,
°С/ hour

800
Temperature spread, °С1050
Temperature spread, °С±2,5
LiningCeramic
fiber
Automation facilitiesSiemens
DescriptionValue
 Unit No. 1Unit No. 2
Rolls dimensions:
Barrel diameter, mm
Barrel length, mm
Total length, mm

up to 1600
up to 2800
up to 8000

up to 2000
up to 2800
up to 8000
Maximum water consumption, m3/ hourup to 100up to 200
Obtained hardness HSD:
barrels
necks


35-55
35-55


60-75
-
Hardness spread, HSDup to 3 pcsup to  2 pcs