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Titanium-nickel-carbon reacting spraying composite powder and preparation thereof

A composite powder and carbon-based technology, applied in metal material coating process, coating, molten spraying, etc., can solve the problems of low carbonization temperature, high carbon purity, and low pollution, and achieve low carbonization temperature and high carbon purity , the effect of little pollution

Inactive Publication Date: 2005-05-11
UNIV OF SCI & TECH BEIJING
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AI Technical Summary

Problems solved by technology

It can not only solve the problem of separation of reactive components in reactive spray powders when preparing carbide composite coatings by reactive thermal spraying, but also has a low carbonization temperature of sucrose, high purity of carbon generated, less pollution during carbonization, and higher industrialization feasibility

Method used

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  • Titanium-nickel-carbon reacting spraying composite powder and preparation thereof
  • Titanium-nickel-carbon reacting spraying composite powder and preparation thereof
  • Titanium-nickel-carbon reacting spraying composite powder and preparation thereof

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Embodiment Construction

[0019] The raw materials used in the present invention are Ni powder, o powder, alloy element powder and sucrose. The composition of the prepared Ti-Ni-C reactive spraying composite powder is shown in Table 1.

[0020] Its specific technological process is:

[0021]1. Mix the raw material powder according to the proportion of the ingredients, and then wet mill it on a ball mill for 24 to 72 hours. The volume ratio of the steel ball to the raw material mixture used is 3:1, the speed of the ball mill is 120r.p.m, and the ball milling medium is alcohol;

[0022] 2. Dry the mixed slurry after ball milling in a drying box, the drying temperature is 50°C, and the drying time is 12 hours;

[0023] 3. Put the dried block material into the burning boat, and then carry out carbonization treatment in the nitrogen protection heat treatment furnace. First, remove hydrogen and oxygen at 250°C for 1.5 hours. Then the temperature was raised to 350°C to continue the carbonization treatment ...

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Abstract

The invention was involved in Ti-Ni-C alloys response spray coating complex powder and its preparation method, which belonged to the powder manufacturing craft of metal ceramic complex coating technology. Cane sugar was used as precursor of carbon and it was carbonized under definite temperature to form Ti-Ni-C alloys response spray coating complex powder, which was enclosed by material powder. The technology was: mixing the Ti and Ni power with mixture ratio ->wet grinding->drying the slurry ->carbonization step by step->breaking and screening. The method not only settled the separation of response component during the response spray powder but also the cane sugar was used as precursor of carbon so it had low carbonization temperature, high carbon purity, small pollution of process of carbonization and the high industrial feasibility. To select Ni as the metal base to reduce rather large grain TiC conglobation and increase the wear-resisting property of coating.

Description

technical field [0001] The invention belongs to the powder making process in the preparation technology of metal-ceramic composite coating, and particularly relates to the preparation of TiC / Ni alloy metal-ceramic composite coating for reaction spraying. Background technique [0002] Metal-ceramic composite coatings, especially metal-ceramic composite coatings with carbide as the reinforcing phase, are wear-resistant coatings with great industrial application prospects. They are used in aviation, aerospace, metallurgy, mining, petroleum and chemical industry It is widely used in the manufacture and repair of wear-resistant components in other fields. In recent years, metal-ceramic composite coatings with TiC particles as the reinforcing phase have attracted special attention, because TiC has low friction coefficient, high hardness, low density and good high temperature stability, and it will gradually replace WC used in traditional processes. , Cr 3 C 2 . At present, the...

Claims

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Application Information

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IPC IPC(8): B22F1/02C22C14/00C22C19/03C22C19/05C22C30/00C23C4/06
Inventor 黄继华刘慧渊
Owner UNIV OF SCI & TECH BEIJING
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