A special alloy powder for laser 3D printing high hardness nickel-based alloy

Abstract

The invention relates to the field of novel materials and in particular relates to alloy powder special for a laser 3D printing high-hardness nickel base alloy. The alloy powder comprises the following raw materials in percentage by weight: 0.9-1.3% of carbon (C), 2.0-2.5% of tungsten (W), 20.0-25.0% of chromium (Cr), 1.2-1.6% of titanium (Ti), 2.0-2.5% of molybdenum (Mo), 1.0-1.5% of vanadium (V), 0.15-0.7% of niobium (Nb) and the balance of nickel (Ni), totaling 100%. The invention aims to provide the alloy powder special for the laser 3D printing high-hardness nickel base alloy, the components of the powder are adjusted, and high-content carbon is added. Therefore, parts subjected to laser 3D printing can be crack-less, the hardness and wear resistance of the parts can also be improved,and the quality of the parts subjected to laser 3D printing is greatly improved.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a special alloy powder for laser 3D printing of high-hardness nickel-based alloys. Background technique [0002] Laser 3D printing technology is an advanced manufacturing technology. This technology melts raw material powder or wire through high-power laser, and accumulates materials point by point and layer by layer under the cooperative movement of the deposition substrate, and prepares parts through continuous growth; metal 3D at home and abroad The metal powders used in printers generally include: stainless steel, titanium alloy, aluminum alloy, nickel-based alloy and cobalt-chromium alloy, etc.; laser 3D printing nickel-based alloy parts have a wide range of uses due to their good corrosion resistance, oxidation resistance and moderate price; At present, the nickel-based alloy materials used for laser 3D printing mainly include: IN718, IN625, 80NiCr and C276, etc.; using existin...

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Problems solved by technology

[0002] Laser 3D printing technology is an advanced manufacturing technology. This technology melts raw material powder or wire through high-power laser, and accumulates materials point by point and layer by layer under the cooperative movement of the deposition substrate, and prepares parts through continuous growth; metal 3D at home and abroad The metal powders used in printers generally include: stainless steel, titanium alloy, aluminum alloy, nickel-based alloy and cobalt-chromium alloy, etc.; laser 3D printing nickel-based alloy parts have a wide range of uses due to their good corrosion resistance, oxidation resistance and moderate price; At present, the nickel-based alloy materials used for laser 3D printing mainly include: IN718, IN625, 80NiCr and C276, etc.; using existing alloy powder as raw material for laser 3D printing of nickel-based alloys has certain defects: (1) hardness of alloy parts Not high, basically below 45HRC, resulting in low wear resistance of parts; (2) Nickel-based alloy materials can only be used in a fully argon-filled environment, and cannot be used in an air environment or a partial argon-filled environment, otherwise it will There will be more oxide inclusions, which will affect the performance of parts (such as plasticity, tensile strength and fatigue performance, etc.), which greatly limits the size of 3D printed parts