Laser additive manufacturing method for multihole micro-channel structure

Abstract

The invention discloses a laser additive manufacturing method for a multihole micro-channel structure. The laser additive manufacturing method for the mulithole micro-channel structure comprises the following steps that a three-dimensional model is established and subjected to layered slicing, and a laser scanning path is acquired; a base material is fixed, and stainless steel/titanium alloy powder is put into a powder cylinder; argon is fed into a forming chamber, and the base material is paved with the powder; laser additive manufacturing equipment is started to conduct scanning machining; aforming cylinder is lowered by a distance of the thickness of a layer, a powder laying device lays a layer of powder on the current machined layer until the structure machining is completed; and a part is subjected to annealing treatment, and the multihole micro-channel structure is obtained. After being formed, the multihole micro-channel structure manufactured through the laser additive manufacturing method is compact, fine and uniform in texture, the metallurgical quality is good, leakage does not occur in the pressing process, the complex inner channel structure is high in size precision,the cross section shape and the distribution limitation of an inner channel are reduced, and the product performance is high; and after the complex multihole inner channel structure is formed, the welding working procedure is not needed, the material utilization rate is increased, working procedures are reduced, and the part manufacturing period is shortened.

Description

technical field [0001] The invention belongs to the technical field of metal forming, and relates to a laser forming of a stainless steel / titanium alloy part, in particular to a laser additive manufacturing method of a complex porous microchannel part. Background technique [0002] At present, the general method of domestic production of porous micro-channel stainless steel / titanium alloy structure is the combination of machining and welding, that is, the internal micro-channel and porous structure are processed by machining, and then the combination is completed by welding, and finally the complex porous microstructure is realized. Manufacture of channel structures. [0003] However, there are some limitations to manufacturing with this method: [0004] (1) The micro-channels are processed by machining, and the processed cross-sectional size is limited, mainly rectangular, V-shaped and circular. It is difficult to realize micro-channels with other complex cross-sections; ...

AI Technical Summary

Problems solved by technology

[0009] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a laser additive manufacturing method for complex porous micro-channel parts, which solves the problem of long product manufacturing cycle and qualified The problems of low efficiency and three-dimensional complex porous microchannel structure are difficult to manufacture