High speed steel
The working layer of HSS content 1.5-2.5% carbon and a large number of Cr, Mo, V, W and other strong carbide alloy elements, a lot of MC and M6C alloy carbide with high micro hardness distribution on the martensite and banite matrix and increased wear resistance. The graphite particles of HSS are finer and more dispersed. During rolling process, graphite particles play a good function of lubrication, and effectively improved surface quality. The wear resistance was improved by 3-5 times than ICDP rolls.
Chemical composition
|
material |
C |
Si |
Mn |
Cr |
Ni |
Mo |
V |
W |
|
HSS |
1.5-2.5 |
0.3-0.8 |
0.5-1.0 |
4.5-6.5 |
0.5-0.8 |
2.0-4.0 |
3.0-4.5 |
3.0-5.0 |
|
S-HSS |
0.6-1.2 |
0.3-0.8 |
0.4-1.0 |
4.0-6.5 |
0.5-0.8 |
1.5-2.0 |
2.5-3.0 |
1.0-1.5 |
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