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What does tool hardness mean? Is the harder the better?

Jun 12, 2019

In fact, there are two kinds of cutters, one is life cutter, the other is machine tool tool.


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What does tool hardness mean Is the harder the better

The hardness of knife (HRC) refers to its ability to resist foreign penetration. No matter what kind, it is not the higher the hardness, the better.

Because there are many standards to measure the quality of a knife, hardness is only the most basic performance of the tool material. Only when the hardness of the tool is higher than that of the product, can the product be cut into the desired shape.

In addition to hardness, the tool should also be moderately tough. When we say "rigid and flexible", we mean that there is only hardness, no toughness, and it is easy to break when confronted with strong impact. Therefore, for a good tool, first of all, it should be a perfect combination of hardness and toughness.

This does not guarantee that a tool is really good. Like life knives, you also need to take into account the sharpness of the blade, blade retention, blade hardness, handle comfort and other factors.

For machine tool tools, it also has high wear resistance, high heat resistance and chemical stability. Because the machine tool processing in constant friction heating.

High wear resistance makes the tool wear less under severe friction. High wear resistance depends on its hardness on the one hand, and on its chemical composition and fiber structure on the other hand. The higher the hardness of the material, the better the wear resistance; the more alloy compounds containing wear resistance, the finer the grain, and the more uniform the distribution, the better the wear resistance.

High heat resistance allows the tool to maintain its original hardness, strength, toughness and wear resistance at high temperature.

Chemical stability makes it difficult for the tool to react chemically with the processing material or surrounding media at high temperatures, including oxidation resistance and bonding ability. The higher the chemical stability, the slower the tool wear and the better the machined surface quality. Hardness is too high, easy to break, easy to break, too low hardness, easy to roll blades.

To sum up, a good tool should be manufactured according to the needs of the environment. For example, cemented carbide tools are better for processing cast iron, non-ferrous metals and non-metallic materials, and diamonds for various wear-resistant non-metallic materials are more suitable. For example, glass fiber reinforced plastic powder metallurgy blanks, ceramic materials, etc.

I hope the sharing of ALLES CNC can help you. ALLES CNC welcomes all of you to come to the quotation news.


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