Additive manufacturing metal cooling method

Abstract

The invention discloses an additive manufacturing metal cooling method. A cooling device is included, and the cooling device achieves cooling in the additive manufacturing process through the following steps of S1, additive manufacturing, wherein laser cladding equipment or electric arc additive equipment is adopted for conducting additive manufacturing on a substrate; and S2, online cooling, wherein the cooling device is arranged behind a heat source and follows the rear portion of the heat source to cool a sintered cladding layer and a heat affected zone below the cladding layer in real time. The cooling device closely follows the rear portion of the heat source, the cooling speed of the cladding layer can be increased, and the depth of the heat affected zone can be reduced; and the cooling speed near a solid solution line is increased in an online cooling manner, supersaturated solid solution of a material is achieved, the strength of the material can be greatly improved only through aging treatment later, and for materials which cannot be subjected to heat treatment strengthening, grains can be refined and the performance can be optimized through the method.

Description

technical field

[0001] The invention relates to the technical field of additive manufacturing, in particular to a metal cooling method for additive manufacturing. Background technique

[0002] The additive manufacturing method is different from the traditional equal material or subtractive material manufacturing technology. It can directly form complex structural parts without molds during the forming process. Its production efficiency is not affected by the complexity of the workpiece, so it is suitable for small batches of complex parts production. For the additive manufacturing of metal materials such as 2-series aluminum-copper, 6-series aluminum-magnesium-silicon alloy, 7-series aluminum-zinc, stainless steel and some titanium alloys, the corresponding parts need to undergo solution heat treatment or solution heat treatment plus aging strengthening heat treatment. Meet the corresponding performance requirements. In the process of additively manufactured parts, especia...

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