Blade tip cutting coating with boundary particle equal size envelope protruding and preparation method thereof
A technology of equal size and particle size, applied in the direction of coating, metal material coating process, melt spraying, etc., can solve the problems of weak bonding of the blade tip surface and irregular distribution of hard ceramic particles on the boundary.
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[0037] A method for preparing a blade tip cutting coating with a protruding envelope of equal size of boundary particles, the specific preparation steps are as follows:
[0038] Step S1, coating the bonding alloy layer 2 on the blade tip surface 1 with a clean surface;
[0039] Step S2, fixing the blade tip surface 1 coated with the bonding alloy layer, and then placing the blade tip surface expansion plate, so that the blade tip surface and the end surface of the blade tip surface expansion plate remain flush;
[0040] Step S3, spreading hard ceramic particles 3 on the blade tip surface equipped with the blade tip surface expansion plate to ensure that the blade tip surface 1 is completely covered, and then removing the blade tip surface expansion plate;
[0041] Step S4, use a roller with a step to roll along the blade tip surface 1 for one week, so that the far-end points of more than 50% of the hard ceramic particles 3 in the large particles with a particle diameter exceed...
Embodiment 1
[0050] A blade tip cutting coating with a protruding boundary particle equal size envelope, including a Ni71CrSi bonding alloy layer and a cubic boron nitride ceramic particle layer. The cubic boron nitride particles with an average particle size of 50 μm are bonded to the Ni71CrSi bonding alloy On the blade tip surface of the nickel-based superalloy GH4037, among the hard ceramic particles of equal size enveloped at the boundary of the blade tip surface, there are more than 50% of the distance from the distal point of the large hard ceramic particles to the boundary of the blade tip surface Equal, the distance from the distal point of the large hard ceramic particles to the boundary of the tip surface is 0.1-0.25 times the average particle size of the hard ceramic particles, forming a sharp exposure of the outer edges and corners of the cubic boron nitride particles, combined with the GH4037 tip surface Robust, cutting coating with prominent boundary grains and other dimension...
Embodiment 2
[0058] A blade tip cutting coating with a protruding boundary particle equal size envelope, including a Ti20Zr25Cu10Ni bonding alloy layer and a cubic boron nitride ceramic particle layer. The cubic boron nitride particles with an average particle size of 100 μm are bonded to the On the blade tip surface of the nickel-based superalloy GH4037, among the hard ceramic particles of equal size enveloped at the boundary of the blade tip surface, there are more than 50% of the distance from the distal point of the large hard ceramic particles to the boundary of the blade tip surface Equal, the distance from the distal point of the large hard ceramic particles to the boundary of the tip surface is 0.1-0.25 times the average particle size of the hard ceramic particles, forming a sharp exposure of the outer edges and corners of the cubic boron nitride particles, combined with the GH4037 tip surface Robust, cutting coating with prominent boundary grains and other dimensions. The concrete...
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