Patent: A High Hardness and High Strength Nickel based Alloy Flux Cored Welding Wire and its Prepara
Flux cored welding wire, also known as powder cored welding wire or tubular welding wire, is divided into two categories: gas filled protection and non gas filled protection. The surface of flux cored wire is made of materials such as low carbon steel or low alloy steel with good plasticity, just like solid core wire. The manufacturing method is to first roll the steel strip into a U-shaped cross-sectional shape, then fill the U-shaped steel strip with welding powder prepared according to the dosage, press it tightly with a rolling mill, and finally pull it to make different specifications of flux cored welding wire. According to the different filling materials, flux cored wire can be divided into slag making flux cored wire (titanium oxide type, titanium calcium type, fluorine calcium type), metal powder cored wire, and alloy cored wire.
Among alloy cored welding wires, nickel based alloy cored welding wires are more common. The current nickel based alloy flux cored welding wire has problems such as low hardness of the weld overlay and poor mechanical strength. Therefore, the present invention relates to a high hardness and high strength nickel based alloy core welding wire and its preparation method, which is used to solve the problem of low hardness and poor mechanical strength of the weld layer formed by the existing nickel based alloy core welding wire.
The preparation method involves the rational compounding of reinforcing powder, iron powder,
nickel powder,
chromium powder,
titanium dioxide powder, calcium fluoride powder, and
silicon dioxide powder in a certain proportion to form a core powder with high hardness and strength. This results in a core welding wire with excellent hardness after welding, greatly improving its wear resistance and mechanical strength.
The powders involved in this preparation method are as follows:
Nickel Powderhttps://www.fusnano.com/metal/nickel-powder.htmlNickel powder is a kind of nickel metal powder with gray appearance. According to different shapes, nickel powder can be divided into spherical nickel powder and irregular nickel powder. According to different production processes, nickel powder can be divided into carbonyl nickel powder, electrolytic nickel powder and atomized nickel powder. According to different particle sizes, nickel powder can be divided into coarse nickel powder, medium nickel powder, fine nickel powder, extremely fine nickel powder, ultrafine nickel powder and nickel nanopowder.
Chromium Powderhttps://www.fusnano.com/metal/chromium-powder.htmlChromium powder is a kind of metal powder with gray appearance. According to different shapes, chromium powder can be divided into spherical chromium powder and irregular chromium powder. According to different particle sizes, chromium powder can be divided into coarse chromium powder, medium chromium powder, fine chromium powder, extremely fine chromium powder, ultra-fine chromium powder and chromium nanopowder.
Titanium Dioxide Powderhttps://www.fusnano.com/oxide/titanium-dioxide-powder.htmlTitanium dioxide is a kind of white oxide powder. The chemical formula is TiO2. The molecular weight is 79.9. The melting point is 1840 ℃. The boiling point is 2900 ℃. The density is 4.26 g/cm3. Titanium dioxide is soluble in hot concentrated sulfuric acid, hydrochloric acid and nitric acid.
Silicon Dioxide Powderhttps://www.fusnano.com/oxide/silicon-dioxide-powder.htmlSilica is a kind of inorganic substance, the chemical formula is SiO2. The density is 2.2 g/cm3. The melting point is 1723 ℃. The boiling point is 2230 ℃. The refractive index is 1.6. Silica is insoluble in water and can react with HF to form gaseous SiF4.
