Do you know the application of metal ceramics in powder metallurgy? Very magical

Tool life and material types are independent and independent in many cutting applications. In other words, any kind of CBN material can make a similar tool life. In these cases, the material selection is based on the minimum cost per cutting edge. A round blade has an entire CBN top surface and can provide four or more cutting edges, which are much cheaper than the four slice CBN inserts.

When the hardness of the P/M part is lower than that of the 35 degree, and the hardness of the particle itself is not beyond the range, the metal ceramic is usually one of the choices. Metal ceramics are very hard, can effectively prevent the accumulation of debris and can withstand high speed. In addition, because the metal ceramic has always been used for high speed and precision machining of steel and stainless steel, they usually have the ideal geometry groove for close to the forming part.

Today, the metal ceramic is complex, there are as many as 11 kinds of alloy elements. Typically, they are sintered with titanium nitride (TiCN) particles and Ni-Mo bonding agent. TiCN provides a very important hardness, anti - chip and chemical stability for the successful use of metallic ceramics. In addition, these tools usually have a high adhesive content, which means they have good toughness. All in all, they have all the properties of the effective processing of P/M alloy. Several materials of the metal ceramic is effective, as cemented carbide sintered cemented carbide, the higher the binder content, the better the toughness.

Known relatively new developments are in the medium temperature chemical vapor deposition (MTCVD) also offers the advantages of the P/M industry. Mtcvd retained the traditional chemical vapor phase deposition (CVD) all wear resistance and anti crater wear performance is very objective to improve the toughness. This increase in toughness mainly comes from the reduction of crack. The coating is deposited at high temperature and then cooled in the furnace. Due to the thermal expansion, when the tool reaches the room temperature, the coating contains a crack. And the scratches on the flat glass are similar to those of the crack which reduce the strength of the tool edge. Lower deposition temperature of MTCVD process leads to lower crack frequency and better toughness.