A method for preparing cobalt-based coating on the surface of cobalt-based alloy
A cobalt-based alloy and cobalt-based technology, applied in metal material coating technology, coatings, metal processing equipment, etc., can solve the problems of high porosity of the coating, large surface defects of the coating, easy peeling off of the coating and the substrate, etc. , to achieve the effect of simple proportioning, low cost and easy operation
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Embodiment 1
[0027] (1) Choose wet ball mill to add raw material powder, Cr powder: 25wt%, Mo powder: 15wt%,, Al powder: 3.5wt%, cobalt powder: 56.5wt%, absolute alcohol is used as grinding medium, carries out with zirconia grinding ball Wet grinding, wherein the ratio of large balls, medium balls, and small balls is 1:2:2, and the weight ratio of balls to medium is 4:2:1. Wet grinding is carried out for 12 hours. The mixed slurry is dried and sieved before adding paraffin wax for molding The agent is then dried and sieved to select a powder mixture with a particle size of 10 μm. Among them, the preparation of cobalt-based electrodes also needs to dope 0.4wt% Y in the powder mixture, accounting for the total mass of raw powder. 2 o 3 powder.
[0028] (2) the powder mixture obtained in step (1) and doped Y 2 o 3 The powder materials are respectively filled in graphite grinding tools, and placed in a vacuum hot-press sintering furnace for vacuum hot-press sintering. The vacuum degree in...
Embodiment 2
[0034] (1) select wet ball mill to add raw material powder, Cr powder: 28wt%, Mo powder: 18wt%,, Al powder: 4wt%,, cobalt powder: 50wt%, carry out wet with absolute ethanol as grinding medium, zirconia grinding ball Grinding, wherein the ratio of large balls, medium balls, and small balls is 1:2:2, and the weight ratio of ball to medium is 4:2:1. Wet mill for 24 hours, dry and sieve the mixed slurry, add paraffin molding agent and then Dry and sieve to select a powder mixture with a particle size of 10 μm. The preparation of the cobalt-based electrode also needs to dope 0.5wt% Y to the powder mixture. 2 o 3 powder.
[0035] (2) the powder mixture obtained in step (1) and doped Y 2 o 3 The powder materials are respectively filled in graphite grinding tools, and placed in a vacuum hot-press sintering furnace for vacuum hot-press sintering. The vacuum degree in the furnace is 1.5×10 -1 Pa, the pressure is 20Mpa, during sintering, the temperature is raised to 200°C at a rate...
Embodiment 3
[0041] (1) select wet ball mill to add raw material powder, Cr powder: 30wt%, Mo powder: 20wt%, Al powder: 5.5wt%, cobalt powder: 44.5wt%, with absolute ethanol as grinding medium, zirconia grinding ball is carried out wet Grinding, wherein the ratio of large balls, medium balls, and small balls is 1:2:2, and the weight ratio of the ball to medium is 4:2:1. After wet grinding for 36 hours, the mixed slurry is dried and sieved, and then paraffin wax forming agent is added. Dry and sieve to select a powder mixture with a particle size of 10 μm. Among them, the preparation of cobalt-based electrodes also needs to dope 0.6wt% Y to the powder mixture. 2 o 3 powder.
[0042] (2) the powder mixture obtained in step (1) and doped Y 2 o 3 The powder materials are respectively filled in graphite grinding tools, and placed in a vacuum hot-press sintering furnace for vacuum hot-press sintering. The vacuum degree in the furnace is 1.5×10 -1 Pa, the pressure is 20Mpa, during sintering...
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