Boride metal ceramic coating material and preparation method
A metal-ceramic coating and metal-ceramic technology, which is applied in metal material coating process, coating, melting spraying and other directions, can solve the problems of high cost, unsuitable for mass production and use, and long preparation time.
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[0034] Example 1:
[0035] Select commercially available micron TiB with a purity of 99.6% or more 2 , Ni, Cr powder, TiB in powder 2 The weight ratio of powder, Ni powder and Cr powder is 60wt.%: 32wt.%: 8wt.%, organic dispersant PAANH 4 The mass of is 0.8% to 1.2% of the mass of the mixed powder, and the mass of the organic binder polyethylene glycol is 15% to 20% of the mass of the mixed powder.
[0036] Use the following steps to prepare high-performance agglomerated sintered powder:
[0037] (1) Put the above materials into deionized water, add the mixed solution to the planetary ball mill and mix the materials at a low speed of 200r / min, the mixing time is 10 hours, and configure it into a viscous slurry.
[0038] (2) Using centrifugal spray drying method to prepare agglomerated spherical powder. The inlet temperature of the spray drying tower is 180°C, the outlet temperature is 90°C, the rotating speed of the centrifugal spray plate is 20000r / min, and the feed rate is 0.4mL / s f...
Example Embodiment
[0046] Example 2:
[0047] Select commercially available micron TiB with a purity of 99.6% or more 2 , Ni, Cr powder, TiB in powder 2 The weight ratio of powder, Ni powder and Cr powder is 60wt.%: 32wt.%: 8wt.%, and the powder preparation process in Example 1 is used to prepare agglomerated sintered powder.
[0048] The base material used for spraying is low-carbon steel, and the surface of the base material is pretreated with rust and oil and sandblasting before spraying.
[0049] The spraying equipment is the JP-5000 supersonic flame spraying system produced by the British TAFA company. The main spraying process parameters when working are: spraying distance 380mm, oxygen flow rate 940L / min, kerosene flow rate 24.6L / h, N 2 The flow rate is 10.3L / min, and the powder feeding rate is about 40g / min. The spraying thickness is controlled at 0.25~0.5mm.
[0050] The mechanical properties of the coating prepared in Example 2 were tested. The test results are shown in Table 1.
Example Embodiment
[0051] Example 3:
[0052] Select commercially available micron TiB with a purity of 99.6% or more 2 , Ni, Cr powder, TiB in powder 2 The weight ratio of powder, Ni powder and Cr powder is 70 wt.%: 24 wt.%: 6 wt.%, and the powder preparation process in Example 1 is used to prepare agglomerated sintered powder.
[0053] The base material used for spraying is low-carbon steel, and the surface of the base material is pretreated with rust and oil and sandblasting before spraying.
[0054] The spraying equipment is the JP-5000 supersonic flame spraying system produced by British TAFA Company. The main spraying process parameters when working are: spraying distance 355mm, oxygen flow rate 870L / min, kerosene flow rate 22.7L / h, N 2 The flow rate is 10.3L / min, and the powder feeding rate is about 40g / min. The spraying thickness is controlled at 0.25~0.5mm.
[0055] The mechanical properties of the coating prepared in Example 3 were tested. The test results are shown in Table 1.
[0056] It can...
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