How to choose the most suitable material for carbide CNC inserts

Carbide CNC inserts are one of the indispensable tools in modern machining, and they are widely used in machinery, aerospace, automotive and other industries. And choosing the most suitable material is crucial to the performance and machining effect of the tool. When choosing the insert material, you need to consider factors such as cutting materials, cutting conditions, cutting force, temperature and cost, etc. The following will detail how to choose the most suitable carbide CNC insert material.

1. Cutting material

jat carbide material

Different cutting materials determine the hardness, toughness and heat resistance and other characteristics of the cutting process. Generally speaking, common cutting materials include general steel, cast iron, stainless steel, high temperature alloys and so on. For different cutting materials, the choice of insert material will be different.

For general steel and cast iron, the generally applicable insert material is WC-Co cemented carbide, WC-Co cemented carbide has high hardness and toughness, can effectively resist the impact and thermal stress generated during cutting, and has a long service life. At the same time, WC-Co cemented carbide also has better cutting performance and self-lubricating properties, which can reduce the cutting force and thermal potential energy and improve cutting efficiency.

For stainless steel, due to its high hardness, high toughness and high cutting temperature and other characteristics, cutting is more difficult. Therefore, it is suitable to choose to use PCD (polycrystalline diamond) inserts. PCD inserts have a very high hardness and thermal conductivity, can effectively resist the high temperature generated in the cutting process, have better cutting performance and wear resistance. At the same time, PCD inserts also have good self-lubricating properties and low coefficient of friction, which can reduce the cutting force and cutting temperature, and improve the cutting quality.

For high-temperature alloys, due to its high hardness, high thermal strength and high toughness and other characteristics, cutting difficulty is also very large. At this time, it is suitable to choose to use PCBN (cubic boron nitride) inserts. PCBN inserts have high hardness and thermal conductivity, can effectively resist the high temperature and impact generated during the cutting process, have better cutting performance and wear resistance. At the same time, PCBN inserts also have better self-lubricating performance and low coefficient of friction, which can reduce the cutting force and cutting temperature and improve the cutting quality.

2. Cutting conditions

Cutting condition

Cutting conditions mainly include parameters such as cutting speed, feed and depth of cut. The differences in these parameters will have a certain impact on the choice of tool material. When choosing the insert material, you need to determine the most suitable insert material according to the specific cutting conditions.

In the case of higher cutting speeds and larger feeds, carbide inserts are generally selected. Carbide inserts have high hardness and toughness, and can maintain better cutting performance and wear resistance under high speed cutting and large feed. At the same time, carbide inserts also have good self-lubricating performance and low coefficient of friction, which can reduce the cutting force and thermal potential energy and improve the cutting quality.

In the case of a larger depth of cut, the general choice of insert material is tougher carbide. Because the increased depth of cut will produce a larger cutting force and thermal stress, the need for inserts with better impact resistance and thermal resistance. Cemented carbide has high hardness and toughness, can effectively resist the impact force and thermal stress generated during the cutting process, with a long service life.

3. Cutting force and temperature

Cutting force and temperature will directly affect the wear and service life of the insert, so in the choice of insert material, need to consider the size of the cutting force and temperature. Generally speaking, the cutting force and temperature is large, suitable for the selection of insert material with high hardness and heat resistance. Carbide inserts with high hardness and heat resistance can effectively resist the cutting force and thermal stress generated during the cutting process, and have a long service life.

4. Cost

Different insert materials have different costs, so when choosing the insert material, you also need to consider the size of the cost. Generally speaking, carbide inserts have lower production and use costs and are suitable for low to medium loads and low to medium precision cutting. PCD and PCBN inserts, on the other hand, have higher production and usage costs and are suitable for high load and high precision cutting.

In summary, the selection of the most suitable carbide CNC insert material requires comprehensive consideration of cutting materials, cutting conditions, cutting force, temperature and cost and other factors. Only by determining the most suitable insert material according to the specific cutting requirements, can we obtain the best cutting performance and effect in the machining process.

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