Brief introduction of nickel-based alloy powder

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What is nickel based alloy powder? Nickel-based powder is widely used for the self-fluxing series of alloy powders. It offers excellent corrosion resistance, oxidation resistant, heat resistance as well as low stress wear resistance. Low melting temperature, wide solid-liquid range, high wetting capability for WC particles and substrates, and simple operation.
The spray-welding layer has outstanding properties of self-fluxing and wettability. Spray-welding layer with high hardness and corrosion resistance. It is also resistant to heat and wear. Wet grinding is preferred.

Classification nickel-based alloy powder
Nickel-chromium alloy thermal spray: There are different types of powder for thermal spray, such as the nickel-chromium heat resistant alloy that is created by adding 20% chrome to nickel. Nickel-chromium heat resistant alloys do not oxidize much at high temperatures and are a good coating material that is resistant to heat, corrosion, and high temperature oxidation. The coating is dense, and adheres well to the base metal. The base metal is used as a transition layer between the ceramic coating, soft metals or other materials. It is a transition layer material that can improve both the base and the coating. The bond strength.
(2) Nickel-chromium and iron alloy thermal powder: This type is made from nickel-chromium and appropriate iron, and has a slightly lower high temperature resistance than nickel chrome alloys. Other properties are the same. Nickel-chromium alloys are similar. Its main advantage is its low cost, making it ideal for corrosion-resistant repairs and transition layer thermal spray.
(3) Nickel-chromium-boron alloy thermal spray powder: This alloy contains elements such as boron, chromium and carbon, so it has high hardness and moderate toughness. The coating becomes heat resistant, wear resistant, and corrosion resistant after spraying. It can be used as an anti-corrosion treatment for shafts and cylinders.
(4) Thermal spraying powder of nickel-aluminum: This powder is used to spray primers and is made up of fine aluminum powder and nickel powder. Thermal spray powder is heated up to 600 degrees Celsius with the flame. A chemical reaction takes place between the nickel and the aluminum that releases heat. The aluminum will also oxidize at the same time and create more heat. Nickel can diffuse into base metal at this temperature, which improves the bonding of the coating. A second feature of the thermal spray powder made of nickel and aluminum is the rough surface that is formed on the coating after spraying. This provides a good surface to connect other spray materials. It is an excellent intermediate material because the expansion coefficient of nickel aluminum composite thermal spray is similar to most steels.

Nickel-based alloy powder – Uses
The welding is done with oxygen-acetylene plasma or flame. The parts that are corrosion resistant, wear-resistant (especially sliding wear-resistant) and have a high wear resistance, like wire drawing drums and rollers in rolling mills.
1. Please adhere to the oxygen-acetylene or plasma spray welding requirements.
2. If you are using medium or small spray welders, then it’s best to use powder with a mesh of -150. When using large spray welders, use powder with a mesh of -150/+320.
3. It is necessary to dry the alloy powder if there is moisture in the powder or if its storage time exceeds three months. (120°C, 2 hours of heat preservation).

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