Cemented tungsten carbide alloy material with gradient cobalt content
A technology of cobalt content and tungsten carbide, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of increased manufacturing cost and poor mechanical properties
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Embodiment 1
[0051] Raw material ratio: the percentage of the total cemented carbide mass.
[0052] WC 90%
[0053] Co 9.7%
[0054] TaC 0.3%,
[0055] 1. To prepare the mixture, mix 35Kg of the above raw materials with a ball ratio of 4:1, wine material 250ml / Kg, and ball mill for 30 hours. The raw materials are graded, with coarse grade: 85%, medium grade: 10%, and fine grade: 5%.
[0056] 2. The size of the sample block is 7X5.5X25mm, and it is pressed by a hydraulic press, and the pressure of the sample block is 5MPa.
[0057] 3. The sintering temperature after pressing is 1450°C, and H is added during sintering. 2 1.0m 3 / h, keep warm at 1400°C for 30 minutes during sintering, keep warm for 30 minutes at 1500°C, and then cool down. Cemented carbide with graded cobalt content is obtained.
[0058] The change curve of the hard alloy from the surface cobalt content that is WC-Co9% to the middle layer cobalt content that is WC-Co 16% cobalt content accounts for the total cobalt elem...
Embodiment 2
[0060] Raw material ratio: the percentage of the total cemented carbide mass.
[0061] WC 90%
[0062] Co 9.9%
[0063] TaC 01%,
[0064] 1. To prepare the mixture, mix 35Kg of the above raw materials with a ball ratio of 4:1, wine material 250ml / Kg, and ball mill for 30 hours. The raw materials are graded, with coarse grade: 75%, medium grade: 15%, and fine grade: 5%.
[0065] 2. The size of the sample block is 7X5.5X25mm, and it is pressed by a hydraulic press, and the pressure of the sample block is 12MPa.
[0066] 3. The sintering temperature after pressing is 1400°C, and H is added during sintering. 2 1.0m 3 / h, keep warm at 1400°C for 30 minutes during sintering, keep warm for 30 minutes at 1500°C, and then cool down. Cemented carbide with graded cobalt content is obtained.
[0067] Some embodiments of the present invention graded cobalt cemented tungsten carbide materials may be used in the manufacture of cutting tools. In particular, tools that may be used for m...
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