Carbide head quality problems, carbide impurities in the carbide head, uneven grain distribution, there are cracks in some carbides, under the impact of the load, the cutter head is in a high stress state, when encountered In hard coal, brittle fracture occurs when the high-pressure stress exceeds the strength limit of hard alloy. If the content of Co in the hard alloy is insufficient, the toughness is insufficient. Under the action of the impact load, the carbide cutting head is also easily brittle. .
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