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Preparation method of chromium oxide and titanium oxide composite powder
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A technology of chromium titanium oxide and composite powder is applied in the field of preparation of chromium oxide titanium oxide composite powder, which can solve the problems of uneven composition and high cost of raw materials, and achieve the effects of good product quality, low production cost and good weather resistance.
Pending Publication Date: 2021-04-09
安徽盈锐优材科技有限公司
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Problems solved by technology
[0003] CT powder is a plasma spraying powder with a wide range of uses. At present, the mainstream production process is to produce sintered chromium oxide and titanium dioxide (containing about 93% titanium oxide) by electromelting and crushing. The cost of raw materials is high and the composition is uneven.
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Embodiment 1
[0020] 1) Take by weighing 725 kilograms of sintered chromium oxide green with a particle size of 0.2-2mm, and 250 kilograms of superfine natural rutile with a particle size of 0.2-2mm, put it into a mixer, and carry out mechanical mixing for 120 minutes;
[0021] 2) Put the mixed raw materials into the electric arc furnace, and energize to completely melt the raw materials;
[0022] 3) Break the cooled frit to 1-3mm particles with a hammer crusher;
[0023] 4) Send the crushed particles into the airflow crushing and classifying, crush and classify the powder of 22-53 μm;
[0024] 5) Use a magnetic separator to remove the free iron brought in by the crusher in the powder to obtain the finished CT25 powder.
[0025] Carry out plasma spraying with the product of the present invention, adopt certain electric current, voltage, main gas flow rate, auxiliary gas flow rate, feeding speed, spraying distance, carry out spraying on carbon steel, the coating surface of preparation has n...
Embodiment 2
[0027] 1) Weigh 600 kilograms of sintered chromium oxide green with a particle size of 0.2-2mm, and 400 kilograms of superfine natural rutile with a particle size of 0.2-2mm, put it into a mixer, and carry out mechanical mixing for 300 minutes;
[0028] 2) Put the mixed raw materials into the electric arc furnace, and energize to completely melt the raw materials;
[0029] 3) Break the cooled frit to 1-3mm particles with a hammer crusher;
[0030] 4) Send the crushed particles into the airflow crushing and classification, crush and classify the powder of 22-90 μm;
[0031] 5) Use a magnetic separator to remove the free iron brought in by the crusher in the powder to obtain the finished CT40 powder.
[0032] Carry out plasma spraying with the product of the present invention, adopt certain electric current, voltage, main gas flow rate, auxiliary gas flow rate, feeding speed, spraying distance, carry out spraying on carbon steel, the coating surface of preparation has no crack,...
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Abstract
The invention discloses a preparation method of chromiumoxide and titaniumoxide composite powder, the chromiumoxide and titaniumoxide compositepowder is composed of the following components by weight: 600-725Kg of chromium oxide and 250-400Kg of natural rutile; titanium oxide used when a CT powdercoating is prepared by a plasma spraying process has the characteristics of high toughness, corrosion resistance and high strength. and the natural rutile is one of the necessary raw materials of high-grade welding electrodes, and is completely feasible to replace titanium dioxide to produce CT powder; in conclusion, the CT powder prepared through the method is low in production cost, high in product quality and large in production capacity, the prepared composite coating is good in weather resistance, high in bonding strength and compact, and a foundation is laid for application of the plasma spraying CT coating in a larger range.
Description
technical field [0001] The invention belongs to the field of thermal spraying technology and material processing, and more specifically relates to a preparation method of chromium oxidetitanium oxide composite powder. Background technique [0002] With the further development of modern industrial technology, the performance and functional requirements of materials are facing increasingly stringent challenges. The material surface is an important carrier of material performance and function, and the use of thermal spraying technology to modify and protect its surface has become a key development direction that has attracted much attention in the field of equipment manufacturing today. In the face of increasingly complex wear and corrosion resistance conditions, a single metal or ceramicthermal spray coating can no longer meet the demand. Plasma sprayed Cr 2 o 3 25%TiO2 2 (CT25), Cr 2 o 3 40%TiO2 2 (CT40) Composite powder can be used to prepare extremely wear-resistan...
Claims
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Application Information
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