INTRODUCE :
Backup rolls are generally used in tension straighteners, levelers, rolling mills and other equipment. As a professional manufacturer from China, Kingrail Parts can provide you with a full range of forged and cast solid steel backup rolls to meet various applications and needs in the market.
Our backup rolls are available in a variety of grades to meet different hardness and wear resistance requirements. We can also produce custom rolls for special purposes.
SPECIFICATIONS :
Manufacturing Capacity
Total length: 6000mm - 6500mm
Body length: 3500mm - 2500mm
Diameter: 910mm - 1500mm
Hardening depth (single side): 50mm - 100mm
Maximum weight: 13000kg - 50000kg
Capacity (tons/year): 8000 - 1000
Chemical composition
|
Material |
Chemical Composition |
||||||||
|
C |
Si |
Mn |
Cr |
Ni |
Mo |
V |
P |
S |
|
|
3%Cr Series |
0.4-0.8 |
0.3-0.7 |
0.4-0.8 |
4.5-5.5 |
0.2-0.8 |
0.3-0.8 |
<0.25 |
≤0.015 |
≤0.015 |
|
5%Cr Series |
0.4-0.65 |
0.2-0.6 |
0.4-0.8 |
2.0-3.0 |
0.2-0.8 |
0.3-0.7 |
<0.25 |
≤0.015 |
≤0.015 |
Chemical properties
|
Material |
Tensile Property Mpa |
Barrel Hardness HSD |
Working Layer Composition |
Hardening Depth mm |
Roller Application |
|
3%Cr Series |
≥880 |
50-65 |
Martensite (bainite) + Carbide |
40-60 |
Single stand mill, Cold & Hot rolling tandem mill |
|
5%Cr Series |
≥950 |
55-80 |
Martensite (bainite) + Carbide |
50-100 |
Single stand mill, Cold & Hot rolling tandem mill |
Production process
Roller blank manufacturing → Roller blank acceptance → Annealing → Rough turning → Ultrasonic flaw detection → High temperature quenching → Low temperature tempering → Ultrasonic flaw detection → Finishing → Ultrasonic flaw detection → Grinding roller body → Rolling number → Inspection → Cleaning → Packing → Shipping
Get more help
Please contact us for more information and free quotes.
