CBN inserts are a superhard material synthesized by hand. Its hardness is second only to diamond. It is a high-pressure and high-pressure sintered cutting tool. It has high hardness, wear resistance and thermal stability. It is widely used in ferrous metal and alloy material processing industry.

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Why can CBN inserts machining the workpiece hardness above HRC60?
1. What kind of material does the CBN inserts mean?
A: CBN inserts are a superhard material synthesized by hand. Its hardness is second
only to diamond. It is a high-pressure and high-pressure sintered cutting tool. It has
high hardness, wear resistance and thermal stability. It is widely used in ferrous metal
and alloy material processing industry.
2. Can CBN inserts process gray cast iron?
A: Yes, both high hardness cast iron and ordinary gray cast iron can be used, and the
processing effect is remarkable. widely used fields include brake discs, brake drums,
and engine blocks.
3. Which industry is the CBN inserts used in?
A: According to the industry: mining machinery, metallurgical rolls, construction
machinery, automobiles, energy, heavy machinery, molds, air conditioning
compressors, aerospace, etc.;
According to the material: high hardness cast iron (high chromium cast iron, nickel
hard cast iron, white cast iron, alloy cast iron, etc.), hard steel (high hardness steel
after heat treatment, high manganese steel, heat resistant wear resistant steel, etc.),
Ordinary gray cast iron / high grade ductile iron, other difficult to machine materials
(high hardness workpieces such as surfacing, spray welding).
According to the parts and components: there are rolls, slurry pump casing, impeller,
liner, brake disc, brake drum, engine, gearbox, gear, gear shaft, bearing, ball screw,
mold, pulley, rolling wall Wait.
4. Why can CBN inserts process workpieces above HRC60?

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A: (1) CBN inserts has high hardness and wear resistance. Its own hardness is
between HRC95-100. It has high hardness and good wear resistance. It can easily
process workpieces above HRC60.
(2) CBN inserts have high thermal stability and high temperature red hardness, can
withstand high temperatures of 1400-1500 °C, so the temperature generated when
processing workpieces above HRC60 will not cause rapid wear or chipping of the
CBN inserts.
(3) CBN inserts have low friction coefficient and excellent anti-adhesive ability.
When processing workpieces above HRC60, it is not easy to form retaining layer or
built-up edge, thus obtaining high surface quality.
(4) However, the CBN inserts will hydrolyze with water at about 1000 °C. Therefore,
the CBN inserts is used to process dry machining when machining workpieces above
HRC60.
5. What CBN inserts are used for the hard turning roll?
A: The CBN inserts for the processing rolls are traditional carbide inserts and CBN
inserts.
When the hardness of the roll is lower than HSD60 (HRC45), the traditional carbide
insert is selected, and the hardness of the HSD60 or higher is selected as the CBN
inserts.
Halnn developed three CBN inserts for high hardness rolls - BN-K1, BN-S20,
BN-S10 grade CBN inserts, of which BN-K1 grade CBN inserts are used for cast iron
rolls, BN-S20 grade CBN inserts used for steel rolls, BN-S10 grade CBN inserts are
specifically for high speed steel rolls above HRC60.
6. How is the CBN inserts tool life calculated?

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A: CBN inserts have no specific life, especially how many workpieces are processed.
For the size, precision, smoothness, etc. of the workpiece to be processed, the life of
the workpiece is different. It is necessary to communicate with the tool engineers of
each company to get a rough estimate. range.
7. Is the cutting fluid added during the machining of the CBN inserts?
A: Generally, no cutting fluid is added, which affects the service life of the CBN
inserts itself, especially the solid CBN inserts (there is no positioning hole in the
middle, the whole body is black). For the brazed CBN inserts with the hole in the
middle, the cutting must be added. In the case of liquid, oily cutting fluid or air
cooling can be used.
8. What is the hardness range that CBN inserts can process?
A: There is no requirement for the hardness of the workpiece in cast iron.
High-hardness cast iron and nickel-hard cast iron and other high-hardness cast iron
and ordinary gray cast iron can be processed. Ball-milled cast iron requires more than
500 grades to use CBN inserts;
For steel parts, the hardness is ≥HRC45 or above, and if it is lower than HRC45, the
processing effect of CBN inserts is not satisfactory.
High-hardness workpieces such as surfacing and spray welding also require hardness
above HRC45.
9. Halnn CBN inserts catalog
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