Hard alloy coating matrix added with rare earth
A cemented carbide and rare earth technology, which is applied in the field of rare earth cemented carbide technology, can solve problems such as difficult control, and achieve the effects of decreasing porosity, improving strength and toughness, and improving deformation resistance
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[0014] Example 1. According to the mass percentage of WC powder: 86.8%; cobalt powder: 6%; TiCN: 3%; tantalum and niobium solid solution: 4%; Y-Co: 0.2%, and then add cemented carbide as a grinding body. The rolling ball mill (the purity of raw materials is greater than 99.5%, the average particle size is less than 3.0μm), the speed of the ball mill is: 35 rpm, the ball-to-material ratio of the ball mill is 4:1, the ball milling medium is anhydrous ethanol, and the liquid-solid ratio 300ml / kg, while adding 2.5% of the total mass of the raw material forming agent and 0.1% oleic acid, the cumulative ball milling time is: 96 hours, the slurry after ball milling is spray-dried for atomization and drying, and the drying outlet temperature: 90°C, drying time: 120 minutes, the bulk density of the spray-dried mixed pellets obtained: 3.5g / cm 3 , The fluidity is: 34 seconds / 50g, the spray pellets that meet the requirements are formed by a precision press and sintered in a pressure sinteri...
Example Embodiment
[0017] Example 2. The mass percentage is based on WC powder: 81.5%; cobalt powder: 8%; TiCN: 4%; tantalum and niobium solid solution: 6%; Y-Co: 0.5%, and then add cemented carbide as a grinding body. The rolling ball mill (the purity of raw materials is greater than 99.5%, the average particle size is less than 3.0μm), the speed of the ball mill is: 35 rpm, the ball-to-material ratio of the ball mill is 4:1, the ball milling medium is anhydrous ethanol, and the liquid-solid ratio 300ml / kg, while adding 2.5% of the total mass of the raw material forming agent and 0.1% oleic acid, the cumulative ball milling time is: 96 hours, the slurry after ball milling is spray-dried for atomization and drying, and the drying outlet temperature: 90°C, drying time: 120 minutes, the bulk density of the spray-dried mixed pellets obtained: 3.4g / cm 3 , The fluidity is: 36 seconds / 50g, the spray pellets that meet the requirements are formed by a precision press and sintered in a pressure sintering f...
Example Embodiment
[0020] Example 3. The mass percentages are based on WC powder: 85.5%; cobalt powder: 6%; TiCN: 3%; tantalum and niobium solid solution: 5%; La-Co: 0.5% and add cemented carbide as the grinding body. The rolling ball mill (the purity of raw materials is greater than 99.5%, the average particle size is less than 3.0μm), the speed of the ball mill is: 35 rpm, the ball-to-material ratio of the ball mill is 4:1, the ball milling medium is anhydrous ethanol, and the liquid-solid ratio 300ml / kg, while adding 2.5% of the total mass of the raw material forming agent and 0.1% oleic acid, the cumulative ball milling time is: 96 hours, the slurry after ball milling is spray-dried for atomization and drying, and the drying outlet temperature: 90°C, drying time: 120 minutes, the bulk density of the spray-dried mixed pellets obtained is: 3.3g / cm3, and the fluidity is: 36 seconds / 50g. The spray pellets that meet the requirements are formed by a precision press Sintering is carried out in a pre...
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