Aluminum matrix composite welding wire for electric arc additive manufacturing and preparation method thereof
An aluminum matrix composite material and composite material technology, applied in the field of aluminum matrix composite material welding wire and its preparation, can solve the problems of difficult heat treatment of large components, limit the application of arc additive manufacturing technology, and poor mechanical properties of printed parts, so as to suppress crystal The effect of grain growth, inhibition of dendrite formation, and improvement of strength and plasticity
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Embodiment 1
[0031] An aluminum-based composite material welding wire for arc additive manufacturing, the composite material welding wire includes a matrix alloy and a nano-reinforcement phase distributed in the matrix alloy, and the matrix alloy contains the following components in mass percentage: Mg6. 5%, Cu 1.4%, Mn 0.8%, the balance is Al; the nano-enhanced phase is TiB 2 The particle size is 50-150nm, and its mass fraction in the composite material is 1.5%.
[0032] The preparation method of the aluminum-based composite material welding wire in this embodiment is: according to the composition of the matrix alloy and the TiB 2 Pure Al, pure Mg, pure Cu, Al-Mn master alloy and TiB required for particle mass fraction calculation 2 the quality of the particles. Melt pure Al at a temperature of 800°C, then add TiB 2 A mixture of granules and salt, where the salt consists of MgF 2 27wt.%, CaF 2 21wt.% and BaF 2 52 wt.%. After the salt is melted, the melt is mechanically stirred at...
Embodiment 2
[0034] An aluminum-based composite material welding wire for arc additive manufacturing, the composite material welding wire includes a matrix alloy and a nano-reinforcement phase distributed in the matrix alloy, and the matrix alloy contains the following components in mass percentage: Mg7. 5%, Cu 1.8%, Mn 0.8%, and the balance is Al; the nano reinforcement phase is TiC particles with a size of 40-200nm, and its mass fraction in the composite material is 1.0%.
[0035] The preparation method of the aluminum-based composite welding wire in this example is as follows: calculate the required mass of pure Al, pure Mg, pure Cu, Al-Mn master alloy and TiC particles according to the composition of the matrix alloy and the mass fraction of TiC particles. Melt pure Al at a temperature of 700°C, then add a mixture of TiC particles and salt, where the composition of the salt is KCl 54wt.%, NaCl 12wt.%, and NaF 4wt.%, CaCl 2 30 wt.%. After the salt is melted, the melt is mechanically s...
Embodiment 3
[0037] An aluminum-based composite material welding wire for arc additive manufacturing, the composite material welding wire includes a matrix alloy and a nano-reinforcement phase distributed in the matrix alloy, and the matrix alloy contains the following components in mass percentage: Mg9. 0%, Cu 2.5%, Mn 1.0%, and the balance is Al; the nano reinforcement phase is TiC particles with a size of 40-200nm, and its mass fraction in the composite material is 1.0%.
[0038] The preparation method of the aluminum-based composite welding wire in this example is as follows: calculate the required mass of pure Al, pure Mg, pure Cu, Al-Mn master alloy and TiC particles according to the composition of the matrix alloy and the mass fraction of TiC particles. Melt pure Al at a temperature of 720°C, then add a mixture of TiC particles and salt, where the composition of the salt is KCl 54wt.%, NaCl 12wt.%, and NaF 4wt.%, CaCl 2 30 wt.%. After the salt is melted, the melt is mechanically s...
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