CBN Insert and Ceramic Insert for machining cast iron
Part 1 CBN Mateirals
Cubic Boron Nitride, is called for short CBN. CBN is one type superhard materials which hardness is only second to diamond. It not only has many diamonds’ excellent characteristics, but also has higher chemial stability. As one type Engineering Material, it is already widely used in ferrous metal and other alloy mateirals industry.
CBN Tools has sharp cutting tips, shape retention is good, wear resistance is high, unit wear is small, and the number of corrections is small, is conducive to automatic processing. It is suitable for all cutting processes from roughing to finishing.
Part 2 Cermaic Materials
Common ceramic is Al2O3 and SiN,ect.The cutting tools made of ceramic, we called them ceramic cutters. Normally they will have the following performance:
(1)Good abrasive resistance, can be used for machining high hardness cast iron, hardened steel,ect.
(2)Ceramic cutters can be used for both roughing and finishing high hardness materials, also can be used for milling, boring, interrupt turning and other machining type.
(3)The durability will be much better than traditional cutting tools, such as tungsten carbide insert.
(4)It has good high temperature resistance and good red hardness. And it can be used for continuous turning in 1200 ℃。
Part 3 Machining Cast Iron
Normally, the castings usually have some defects, such as hard pot, stomach, sand, which will take some problems for the process. And it will lead to the insert wear or damage rapidly, which will affect the process efficiency. So the manufacturers would like to search new cutting tools to help them improve the efficiency, so that obtain much benefit.
In current times, the cutting tools that can be used for machining cast iron include tungsten carbide insert, ceramic cutters and cbn insert. Tungsten carbide insert has low price, suits for small qty castings producing. When the production is large, tungsten carbide insert efficiency will be low, only use ceramic cutters and cbn inserts.
Ceramic insert can be used for high speed cutting cast iron, and improve the efficiency obviously, but because of the brittleness, when the castings have defects, ceramic cutters will be easily chipping.
CBN Insert can be used for machining cast iron. Depending on the customers’ requirements, Halnn first proposed cbn inserts for machining high alloy cast iron, white iron, grey iron,and has researched cbn grade BN-S300, BN-K20 and BNK30 for gray cast iron and cbn grade BN-K1, BN-H10 and BN-K10.
Halnn cbn insert for machining cast iron(high hardness cast iron and gray cast iron) together with the cutting parameters.
|
Machining Materials |
Machining Type |
Cutting Speed Vc (m/min) |
Cutting Depth ap（mm） |
Feed Rate
Fr（mm/r） |
Recommend CBN Grade |
|
High Hardness Cast Iron（Hardness：HRC35-68） |
Roughing |
35-120 |
1-10 |
0.15-1.0 |
BN-K1 |
|
Finishing |
60-200 |
≤1 |
0.05-0.35 |
BN-K10, BN-H10 |
|
Gray Cast Iron |
Roughing |
400-1200 |
1-10 |
0.2-1.0 |
BN-S30, BN-S300 |
|
Finishing |
600-2000 |
≤1 |
0.05-0.3 |
BNK30, BN-K10，BN-K20 |
If you would like to know more details, please feel free to contact with us info@halnntools.com