Process for preparing tungsten-cobalt hard alloy
A cemented carbide, tungsten-cobalt technology, applied in the field of preparation of tungsten-cobalt cemented carbide, can solve problems such as low toughness and limited application range
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Embodiment 1
[0007] Example 1: Batch WC powder of two types of thickness and 6.0wt% Co powder according to certain requirements, unload after 20-23 hours of wet grinding, settle for 5-8 hours, dry and vibrate, mix with forming agent to granulate, and press Forming, molding agent removal and sintering at 1450 ° C for 50 minutes to make cemented carbide. Among them, the particle size of coarse WC powder is 24.0 μm, the particle size of fine WC powder is 1.4 μm, the weight ratio of coarse WC powder and fine WC powder is 70:30, and the particle size of Co powder is 2.0 μm.
Embodiment 2
[0008] Example 2: Mix WC powder of two types of thickness and 5.0wt% Co powder according to certain requirements, unload after 20-23 hours of wet grinding, settle for 5-8 hours, dry and vibrate, mix with forming agent to granulate, and press Forming, molding agent removal and sintering at 1450 ° C for 50 minutes to make cemented carbide. Among them, the particle size of coarse WC powder is 28.4 μm, the particle size of fine WC powder is 1.2 μm, the weight ratio of coarse WC powder and fine WC powder is 70:30, and the particle size of Co powder is 1.0 μm.
Embodiment 3
[0009] Example 3: Mixing WC powder of two types of thickness and 4.0wt% Co powder according to certain requirements, unloading after 20-23 hours of wet grinding, sedimentation for 5-8 hours, drying and vibrating sieve, granulating with forming agent, and pressing Forming, molding agent removal and sintering at 1450 ° C for 50 minutes to make cemented carbide. Among them, the particle size of coarse WC powder is 20.0 μm, the particle size of fine WC powder is 1.8 μm, the weight ratio of coarse WC powder and fine WC powder is 70:30, and the particle size of Co powder is 1.5 μm.
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