Hard alloy for low-load high-speed punching precision mold and preparation method thereof
A high-speed stamping and precision mold technology, applied in the field of cemented carbide, can solve problems affecting the quality of stamped parts, poor wear resistance of parts, micro-cracking, etc., and achieve excellent chemical corrosion resistance, long service life, and high hardness.
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[0029] Example 1: The cemented carbide of the present invention according to the following steps:
[0030] (1) Equipped with raw materials: 100% based on the total weight of raw materials, take the fine-grained WC with a mass percentage of 63.49% and a Fischer particle size of 0.9μm, a Co powder with a mass percentage of 5.67%, and a Ni powder with a mass percentage of 2.83% , 0.8% by mass of Cr 3 C 2 WC with a mass percentage of 27.21% and a Fischer grain size of 1.9μm; the actual total carbon content of the above raw materials is 5.69% (fine-grained WC3.90%+Cr 3 C 2 0.11% + coarse grain WC1.68%);
[0031] (2) Add C / W: The total carbon balance correction value of the alloy is taken as 0.03%, the total carbon correction value of the alloy = the actual total carbon content of the raw material 5.69%-the theoretical total carbon content of the alloy in this example is 5.67%-the total carbon balance of the alloy Correction value 0.03%=-0.01%, this value is negative, add carbon black wh...
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