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Process for the production of articles made of a gamma-prime precipitation-strengthened nickel-base superalloy by selective laser melting (SLM)
Process for the production of articles made of a gamma-prime precipitation-strengthened nickel-base superalloy by selective laser melting (SLM)
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机译:通过选择性激光熔化(SLM)来生产由γ′沉淀沉淀强化的镍基高温合金制成的物品的方法
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摘要
A process for producing a crack-free and dense three-dimensional article of a gamma-prime precipitation-strengthened nickel-base superalloy, with more than 6 wt. % of [2 Al (wt. %)+Ti (wt. %)], which involves: (a) preparing a powder layer of a gamma-prime precipitation-strengthened nickel-based alloy material, with uniform thickness on a SLM apparatus substrate plate, or on a previously processed powder layer; (b) melting the prepared powder layer by scanning with a focused laser beam an article cross section area according to a three-dimensional sliced model with calculated cross sections, stored in the SLM control unit; (c) lowering the substrate plate by one layer thickness; and (d) repeating (a) to (c) until reaching a final cross section according to the three-dimensional sliced model, wherein, for (b), the laser power, focus diameter of the focal spot, and scan speed of the focused laser beam are adjusted to obtain heat dissipation welding.
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