Product Details

China PCBN Producer CBN Cutting Inserts Turning Machining Powder Metallurgy Pulley

1. The characteristics of Powder Metallurgy

(1) Powder metallurgy technology can minimize segregation of alloy components and eliminate coarse and uneven casting structures.

(2) Powder Metallurgy technology can be used for making a series of non-equilibrium materials, such as amorphous, microcrystalline, quasi-srystalline, nanocrystalling and supersaturated solid solutions. And these mateirals will excellent electrical, magnetic, optical and mechanical properties.

(3) It can realize the recombination of multiple types mateirals, and full exerted the characteristics of each component mateirals. Powder Metallurgy is a kind technology that can produce metal-based and ceramic composite materials with low-cost.

2. Process Difficulties of Powder Metallurgical Materials

(1) Even though Powder Metallurgical Component only have small allowance, but it is very difficult to machine, because these type materials has porous structure which reduce the tool life.

(2) The Porosity will lead to the Micro fatigue of the cutting edges. When the cutting tools machine these type materials, the tips will continuous obey the impact, and it will make the tip produce small crack, which will Gradually increase and become small chipping. And it will show with normally wear.

(3) The porosity also will reduce the Thermal conductivity of the Powder Metallurgy component. The cutting tip has high temperature when in the process, and cause the insert deformation. The Internal porous structure will lead to the Hot crack or deformation.

(4) Internal porous structure will lead to the hardness fluctuation, and the Macro hardness will be about HRC20~35, however the partical hardness will be about HRC60 which will make the insert tips wear seriously.

3. The cutting parameters for machining powder metallurgy component with cbn inserts.

Machining Materials

Cutting Speed Vc（m/min）

Cutting Depth ap(mm)

Feed Rate

Fr（mm/r)

CBN Grade

Powder Metallurgy

90-180

≤0.5mm

0.1-0.2

BN-K10 BN-K50