A kind of wear-resistant cermet with tic-ni-mo2c alloy as wear-resistant phase and its preparation method and application
A wear-resistant phase and composite metal technology, applied in the field of cemented carbide, can solve the problems of short life and low wear resistance of rock drilling tools, and achieve the effect of high fracture toughness and high wear resistance.
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[0030] The present invention provides a method for preparing the multi-stage composite cermet described in the above technical solution, comprising the following steps:
[0031] A) Coating the transition phase on the outer layer of the wear-resistant phase to obtain aggregates; the wear-resistant phase includes TiC-Ni-Mo 2 C alloy, the transition phase comprising WC-Co alloy;
[0032] B) mixing the pellets with the matrix and sintering to obtain a multi-level composite cermet.
[0033] In the preparation method provided by the present invention, first provide wear-resistant phase, with TiC-Ni-Mo 2 C alloy is taken as an example of the wear-resistant phase, and the present invention preferably prepares the wear-resistant phase according to the following method:
[0034] First, the TiC, Mo 2 C. Ni is mixed with a forming agent to obtain a mixture; then the mixture is sequentially subjected to wet grinding, dry granulation, sieving, dewaxing and sintering to obtain a wear-resi...
Embodiment 1
[0045] 1) Prepare the wear-resistant phase according to the following method:
[0046] 10wt.% Ni, 80wt.% TiC, 10wt.% Mo 2 C and 2wt.% paraffin wax are mixed to obtain a mixture; the mixture is sequentially subjected to wet grinding, dry granulation, sieving, dewaxing and sintering to obtain wear-resistant phase aggregates. The ball milling speed of the wet milling is preferably 200 r / min, the wet milling time is 48 hours, and the drying and granulation temperature is 60°C. The dewaxing is carried out in hydrogen, the dewaxing temperature is 400°C, the dewaxing time is 2 hours, the sintering is carried out in vacuum, and the sintering temperature is 1400°C. The particle size of the wear-resistant phase prepared in this example is 100 μm, and the composition is TiC-10Ni-10Mo 2 c.
[0047] 2) Prepare the transition phase according to the following method:
[0048] The transition phase WC-Co is prepared by mixing 85wt.% WC powder, 15wt.% Co powder and 2wt.% paraffin. 46.3g of...
Embodiment 2
[0053] 1) Prepare the wear-resistant phase according to the following method:
[0054] 10wt.% Ni, 80wt.% TiC, 10wt.% Mo 2 C and 2wt.% paraffin wax are mixed to obtain a mixture; the mixture is sequentially subjected to wet grinding, dry granulation, sieving, dewaxing and sintering to obtain wear-resistant phase aggregates. The ball milling speed of the wet milling is preferably 200 r / min, the wet milling time is 48 hours, and the drying and granulation temperature is 60°C. The dewaxing is carried out in hydrogen, the dewaxing temperature is 400°C, the dewaxing time is 2 hours, the sintering is carried out in vacuum, and the sintering temperature is 1400°C. The particle size of the wear-resistant phase prepared in this example is 150 μm, and the composition is TiC-10Ni-10Mo 2 c.
[0055] 2) Prepare the transition phase according to the following method:
[0056]The transition phase WC-Co is prepared by mixing 85wt.% WC powder, 15wt.% Co powder and 2wt% paraffin. 35.6g of t...
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