Hard alloy mold material for titanium alloy fastener formed through warm forging and preparation method of hard alloy mold material
A technology of cemented carbide and mold materials, which is applied in the field of cemented carbide mold materials and its preparation, and can solve problems such as being easily eroded by chemical media, fragile in structure, and peeling off of hard phase grains.
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[0033] The preparation method of the above-mentioned cemented carbide mold material for forming titanium alloy fasteners by warm forging, the process steps are:
[0034] 1) Put tungsten carbide, cobalt, nickel, chromium carbide and rhenium into the rolling ball mill according to the proportion, add wet grinding medium and forming agent under the proportion of wet grinding ball and mixture, and ball mill for 10 to 15 hours; among them, wet The grinding balls are cemented carbide balls with a diameter of 6-10 mm, and the mass ratio of wet grinding balls to mixture is 1.5:1. The wet grinding medium is alcohol with a purity higher than 99.7%, and the ratio of the wet grinding medium to the mixture is 1L: 2Kg. The molding agent is paraffin, the oil content is less than 0.5%, and the amount of paraffin added is 1-5% of the total weight of the mixture.
[0035] 2) The wet-milled slurry is dried and granulated in a spray tower with a spray pressure of 1-1.3 MPa;
[0036] 3) The drie...
Embodiment 1
[0044] Using WC powder with Fsss particle size of 6.5μm, by weight ratio WC:Co:Ni:Cr 3 C 2 : Re = 80.5: 18: 1: 0.3: 0.2 formula with powder, the mass ratio of wet grinding balls to the mixture is 1.5:1, the grinding medium is alcohol, the ratio of alcohol to mixture is 1L: 2Kg, the forming agent is paraffin, The addition amount is 2% of the weight of the mixture, ball milled for 15 hours, the powder after ball milling is spray-dried and granulated, and pressed into shape, and finally put into a 6MPa low-pressure sintering furnace at 1380°C for 60 minutes, and the sintering furnace is cooled to room temperature Alloy products were obtained, and their physical and chemical testing results are shown in Table 1.
[0045] Table 1 Example 1 alloy physical and chemical properties
[0046]
[0047] It can be seen from Table 1 that the physical and chemical properties of the alloy are normal, and the hardness is 84.5 degrees, which guarantees the wear resistance of the alloy well,...
Embodiment 2
[0053] Using WC powder with Fsss particle size of 2.5μm, by weight ratio WC:Co:Ni:Cr 3 C 2 : Re = 73.5: 22: 2: 1.5: 1 formula with powder, the mass ratio of wet grinding balls to the mixture is 1.5:1, the grinding medium is alcohol, the ratio of alcohol to mixture is 1L: 2Kg, the molding agent is paraffin, The addition amount is 2% of the weight of the mixture, ball milled for 15 hours, the powder after ball milling is spray-dried and granulated, and pressed into shape, and finally put into a 6MPa low-pressure sintering furnace at 1380°C for 60 minutes, and the sintering furnace is cooled to room temperature Alloy products were obtained, and their physical and chemical testing results are shown in Table 2.
[0054] Table 2 Example 2 alloy physical and chemical properties
[0055]
[0056] It can be seen from Table 2 that the physical and chemical properties of the alloy are normal, and the hardness is 82.8 degrees, which well guarantees the wear resistance of the alloy an...
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