Cutters
Cutters and inserts equipped with K12 composite based on cubic boron nitride are intended for semi-finishing and finishing of hardened steels (HRC 40-70), cast irons, hard alloys and other difficult to process materials. Compared with elbor-R K 01 and hexanite-R K 10D, composite K12 has higher wear and impact-resistance. Composites based on cubic boron nitride has high hardness (4000-7000 kgf / mm.sq.), 2-4 times higher than hard alloys, high heat-resistance (1100-1300 ° C), chemical inertness to processed materials and viscosity to provide better work with shock loads.
Re-cutting of cutters and inserts equipped with a composite is made with diamond wheels, with a grain 160/125 on organic bond, with a diamond concentration of 150%. Afterwards finishing with a diamond wheel with a grain 28/20 on organic B3-01 bond, with a concentration of 100%.
Recommended modes for sharpening
| Processed material | Type of processing | Speed, V, m/min | Supply, S, mm/t | Depth, t, mm |
|---|---|---|---|---|
|
Hardened steels |
Semi-finished |
40 - 60 |
0,1 - 0,15 |
0,2 - 0,6 |
|
Hardened steels |
Finished |
50 - 75 |
0,03 - 0,07 |
0,1 - 0,2 |
|
Gray and high strength cast iron |
Semi-finished |
200 - 400 |
0,08 - 0,2 |
0,4 - 0,7 |
|
Bleached and hardened cast iron |
Semi-finished |
60 - 100 |
0,07 - 0,15 |
0,4 - 0,7 |
|
Hard alloys |
Semi-finished |
5 - 20 |
0,04 - 0,1 |
0,2 - 0,5 |
*In each case, the modes are adjusted according to the results of trial processings.