Nickel-based high-temperature alloy powder for 3D printing and preparation method for nickel-based high-temperature alloy powder

Abstract

The invention discloses a nickel-based high-temperature alloy powder for 3D printing and a preparation method for the nickel-based high-temperature alloy powder. The nickel-based high-temperature alloy powder consists of the following raw materials in percentage by weight: 50-80% of Ni, 3-7% of Al, less than or equal to 1% of Si, 1-6% of Ti, 0.1-1% of V, 2-10% of Cr, less than or equal to 1% of Mn, 1.68% of Fe, and 8-15% of Co. The preparation method comprises the following steps: (1) weighing the raw materials in proportion by weight, and putting the raw materials into a vacuum smelting furnace for smelting the raw materials into a liquid; (2) atomizing the smelted liquid obtained in the step (1) in high-pressure argon gas at degree of superheat being 20-40 DEG C, thereby obtaining alloy powder; and (3) carrying out high-temperature annealing treatment on the alloy powder obtained in the step (2) under the protection of argon gas, carrying out vibration screening and cooling on the alloy powder, then, grading the alloy powder and carrying out vacuum packaging on the alloy powder, thereby obtaining the nickel-based high-temperature alloy powder. The alloy powder is high in degree of sphericity, is great in loose specific weight, is good in liquidity and is narrow in grain size distribution, and is especially suitable for the 3D printing field.

Description

technical field [0001] The invention relates to a nickel-based superalloy powder for 3D printing and a preparation method thereof, belonging to the field of superalloys. Background technique [0002] 3D printing metal powder is the most important link in the 3D printing industry chain of metal parts, and it is also the greatest value. At the "2013 World 3D Printing Technology Industry Conference", authoritative experts in the world's 3D printing industry gave a clear definition of 3D printing metal powder, which refers to the group of metal particles whose size is less than 1mm. Including single metal powder, alloy powder and some refractory compound powder with metallic properties. At present, 3D printing metal powder materials include cobalt-chromium alloy, stainless steel, industrial steel, bronze alloy, titanium alloy and nickel-aluminum alloy, etc. However, in addition to good plasticity, 3D printing metal powder must also meet the requirements of fine powder particle...

AI Technical Summary

Problems solved by technology

[0004] With the rise of 3D printing technology, people have attracted more attention to metal powder, and at the same time put forward higher requirements for metal powder, which must meet the requirements of small particle size, narrow particle size distribution, high sphericity, good fluidity, The characteristics of high bulk density, at present, these properties are difficult to meet at the same time, resulting in more defects in 3D printed products through laser sintering, and superalloys are widely used metal materials in the field of powder metallurgy. The speed is fast, and it is easy to form defects such as thermal cracks, which greatly limit the application of superalloy powder in the field of 3D printing