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In metal cutting, the tool material, that is, the cutting part, is subjected to great cutting force and impact, and is subjected to severe friction of the workpiece and chips, resulting in a high cutting temperature. Its cutting performance must have the following aspects. (1) High hardness: HRC62 or above, at least higher than the hardness of the material to be processed. (2) High wear resistance: Under normal circumstances, the harder the material, the more carbon in the tissue, the finer the particles, and the more uniform the distribution, the higher its wear resistance. (3) Sufficient strength and toughness (4) High heat resistance. (5) Good thermal conductivity. (6) Good workmanship and economy.
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