As an important tool and key component for rolling ferrous and metal billets into products, the consumption cost of rolls is about 5%-15% of the production cost of steel rolling, which is directly related to the production efficiency, product quality and production costs of steel production enterprises.
With the transformation and upgrading of the metallurgical iron and steel industry, more and more cast high-speed steel rolls and high-performance high-hardness alloy wear-resistant parts have been widely used, among which the composite high-speed steel rolls are the most difficult to process. This kind of cast rolls of HRC63 or above, its ultra-high hardness and heavy-duty cutting have extremely high requirements on cutting tools. The BN-S10 grade is strongly launched as an updated product under this background, which is unique in the fields of high hardness and heavy-duty cutting casting rolls.
BN-S10 grade is a new tool material of Halnn tools for high-hardness casting rolls. Its advantages are:
(1) Ultra-high hardness and excellent wear resistance;
(2) The non-metallic binder integral polycrystalline CBN tool has both heat resistance and impact toughness;
(3) High-hardness casting rolls are cut with large allowance and heavy load, reducing the number of passes and improving production efficiency;
(4) Dry cutting to achieve clean production.
The cutting parameters are as follows:
| CBN grade | Processing material | Recommended cutting parameters |
| Cutting speed Vc (m/min) | Cutting depth ap(mm) | Feed Fr(mm/r) |
| BN-S10 grade | High hardness casting roll | 35-120(Roughing) | 1-10 | 0.15-0.7 |
| 60-180(Finishing) | ≤１ | 0.05-0.35 |
Halnn super-hard CBN tool BN-S10 has a variety of models to choose from. For different processing parts, choose the appropriate blade model for heavy-duty cutting of high-hardness cast rolls, which can effectively improve production efficiency and reduce production costs.
For example, the outer circle of the casting roll is processed, and the commonly used models are RNMN160800, RNMN200800, RNMN120400, SNMN150716, SNMN120712, SNMN120412 (08), CNMN1207 or CNMN1204. For machining cast roll grooves, circular inserts with conical bottoms such as RCMX120700 or V-slotted inserts are generally recommended.
Remarks: (1) For different material rolls, Halnn tools have different insert materials recommendations. Before purchasing, try to communicate with the tool engineer to choose a suitable cutting tool.
(2) Dry cutting is used when heavy-duty cutting rolls are used, and no cutting fluid is added. Otherwise, it is prone to micro-crack or break.