① During transportation, avoid collision or impact of cemented carbide products with each other, which will cause the cemented carbide to fall off corners or produce micro cracks.
②It is recommended to use resin bond when grinding. Diamond grinding wheels with medium-soft hardness and 75% concentration are used for processing; the feed cannot be too large during processing. Recommended: rough grinding not greater than 0.02mm, fine grinding not greater than 0.01mm; at the same time, adequate cooling should be paid to avoid processing When stress is concentrated or grinding cracks. It is recommended to carry out the necessary aging treatment after processing.
③It is not allowed to make impact compression on cemented carbideproducts.
④The cemented carbide products after high temperature inlaid welding should be slowly (heat preservation) cooled, not emergency (air) cooling.
⑤In the process of manufacturing molds, sharp edges and corners should be avoided in the shape design. Because cemented carbide is very sensitive to stress concentration, the edges and corners are most likely to be broken under the action of stress; the insert material should be forged to make the material grain fine In order to improve the mechanical properties of the insert sleeve; if the strength of the mold material allows, a larger interference fit should be used as much as possible. Ensure that the cemented carbide die part has sufficient prestress; at the same time, When designing the matching interference of the cemented carbide die, it is necessary to fully consider the heat generation during the working process of the mold. Because the expansion coefficient of the cemented carbide material is small, the linear expansion coefficient of the steel sleeve is large, and the original pressure after the mold heats up The amount of interference may change, resulting in a decrease in the prestress of the cemented carbide die, resulting in cracks
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