How to choose a cemented carbide matrix for different processing conditions?
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Answer:
When the processing conditions are different, the requirements for the coated cemented carbide substrate are also different. When processing cast steel, iron forgings and turning, the coated blades generally use P-type cemented carbide as the matrix. When processing ductile iron (including intermittent turning), a single WC-Co alloy is used as the substrate. When processing low-alloy steel and stainless steel (including forgings and intermittent turning), TiC with a content of less than 3% and a TaC of about 3% are generally added as a matrix. The matrix applied to the Al203 coating under high-speed cutting should focus on the resistance to thermoplastic deformation and the resistance to the crater wear. The strength and toughness of the matrix can be slightly lower. tungsten carbide find in wooccarbide. Conversely, TiC coatings are used for rough cutting at lower cutting speeds and large feed rates. At this time, the strength and toughness of the base cemented carbide are better, and the resistance to thermoplastic deformation is moderate.
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