Plasma spraying method used for preparing titanium-silicon-carbon composite coating layer
A plasma and carbon composite technology, applied in coating, metal material coating process, melting spray plating, etc., to achieve the effect of fine grain, good wear resistance, and improved compactness
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[0031] Example 1:
[0032] In this embodiment, the method for preparing Ti-Si-C cermet composite coating by reactive plasma spraying based on agglomerated powder modification includes the following steps:
[0033] Step 1. Weigh the raw materials according to 73.5wt% of Ti powder, 14.3wt% of silicon powder and 12.2wt% of graphite powder, and the purity is 99.9%. Among them, the particle size of Ti powder is 325-500 mesh, and the particle size of Si powder is 2000 to 4000 mesh, the particle size of graphite powder is 8000 mesh to 15000 mesh.
[0034] Step 2: Add deionized water and gel to the raw material powder (the gel is obtained by mixing the mass ratio of water: sodium carboxycellulose = 100:1. The composition of the gel in the following examples is the same), and then add the total raw material powder 1% of the mass of PVP is a dispersant, mixed and mechanically stirred for 3 hours to obtain a slurry; wherein the mass ratio of the original powder, deionized water, gel=2:2:1;
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Example Embodiment
[0046] Example 2:
[0047] In this embodiment, the method for preparing Ti-Si-C cermet composite coating by reactive plasma spraying based on agglomerated powder modification includes the following steps:
[0048] Step 1. Weigh the raw materials according to 64.5wt% of Ti powder, 25wt% of silicon powder, and 10.5wt% of graphite powder;
[0049] Step 2. According to the total mass of the original powder and the mass of deionized water, the gel mass ratio is 2:2:1, and 1% PVP of the total mass of the raw powder is added as a dispersant, mixed, and mechanically stirred for 3 hours to obtain a slurry;
[0050] Step 3. Spray drying: spray the mixed slurry into the drying chamber for atomization, and quickly dry to form agglomerated particles, where the inlet temperature of the spray dryer is 260°C and the outlet temperature is 110°C;
[0051] Step 4. Use a sieve to select agglomerated particles with a size of 100-300 meshes as spray feed;
[0052] Step 5: Grind the 45# steel substrate clean w...
Example Embodiment
[0061] Example 3:
[0062] In this embodiment, the method for preparing Ti-Si-C cermet composite coating by reactive plasma spraying based on agglomerated powder modification includes the following steps:
[0063] Step 1. Weigh the raw materials according to 57wt% Ti powder, 30wt% silicon powder and 13wt% graphite powder;
[0064] Step 2. According to the total mass of the original powder and the mass of deionized water, the gel mass ratio is 2:2:1, adding 1% PVP of the total mass of the raw powder as a dispersant, mixing, and mechanically stirring for 3 hours to obtain a slurry;
[0065] Step 3. Spray drying: spray the mixed slurry into the drying chamber for atomization, and quickly dry to form agglomerated particles, where the inlet temperature of the spray dryer is 260°C and the outlet temperature is 110°C;
[0066] Step 4. Use a sieve to select agglomerated particles with a size of 100-300 meshes as spray feed;
[0067] Step 5: Grind the 45# steel substrate clean with sandpaper, and...
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