What is chromium carbide?

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2022-09-05 13:19

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What is chromium carbide?

Chromium (II) carbide is a ceramic compound that is found in many chemical compositions: Cr3C2, Cr7C 3 and Cr23C6. Under standard conditions, it is present as a gray solid. It is very hard and corrosion resistant. It is also a fire-resistant compound, which means it can maintain its strength at high temperatures. These properties make it useful as an additive to metal alloys. When chromium carbide crystals are bonded to the metal surface, it will improve the wear resistance and corrosion resistance of the metal, and maintain these characteristics at high temperatures, so what is chromium carbide?

What is chromium carbide?

1. Chromium can be used for surface treatment of metal parts. Through a technique called thermal spraying, chromium is used to coat the surface of another metal. The Crc2 powder was mixed with solid nickel chromium. The mixture is then heated to a very high temperature and sprayed onto the coated object, where a protective layer is formed. This layer is essentially its own metal matrix composite, consisting of hard ceramic Cr 3 C 2 particles embedded in a nickel-chromium matrix.

2. The substrate itself contributes to the corrosion resistance of the coating, because the metal form of nickel chromium has corrosion resistance. After spraying, the coated part is subjected to diffusion heat treatment to obtain good bonding strength and hardness with the substrate. Another technique uses chromium carbide in the form of a cover plate. These are prefabricated chromium carbide coated steel plates designed to be welded to existing structures or machines to improve performance.

What is the use scenario of chromium carbide?

Wear-resistant film and semiconductor film, adding Cr3C2 in the production of cemented carbide can not only refine the WC grain, but also improve the strength, hardness and corrosion resistance of the alloy. Widely used as corrosion-resistant alloy structural materials (instruments, valves, seals, etc.).) In industrial production, it is used for spray welding and surfacing of hard-facing solder that requires both corrosion resistance and high wear resistance. Widely used in smelting and production of stainless steel, heat-resistant steel, corrosion-resistant steel, alloy steel and other special steel.

Chromium carbide chromium poisoning will get what disease?

Chromium poisoning can cause chromium nose disease. Chromium is a metal and a trace element required by the human body. Chromium itself is not toxic, but chromium compounds are toxic, especially hexavalent chromium compounds are more toxic, irritating and corrosive. Long-term respiratory tract inhalation of smoke or dust containing chromium compounds, irritation and corrosion of human skin and sticky membrane, dry nose, nose pain, nasal mucosa red swelling, but also affect the sense of smell appear decreased, severe nasal mucosa erosion, long ulcers, and even perforation, known as chromium rhinopathy.

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