Process for preparing guide vane by selective laser melting
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A technology of laser selective melting and guide blades, which is applied in the direction of process efficiency improvement, mechanical equipment, additive manufacturing, etc., can solve the problems of long production cycle, low yield rate, cumbersome process, etc., and achieve surface quality assurance and forming accuracy assurance Effect
Inactive Publication Date: 2019-12-03
航发优材(镇江)增材制造有限公司
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The traditional preparation process of guide vanes is precision casting, which has a low yield rate and long production cycle, and the process is cumbersome
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[0022] see Figure 1 to Figure 2 , a process for preparing guide vanes by laser selective melting, comprising the following steps:
[0023] S1. Choose a suitable forming angle: When placing the guide vane, it should choose the direction of spreading powder along the scraper, which is helpful for printing and forming, and avoids the phenomenon of knife jamming. The upper and lower end faces 100 form an included angle greater than 30° with the X-Y horizontal plane, so as to avoid the emergence of large horizontal cross-sections during the forming process and the excessive stress that causes the surface to warp when powder is laid layer by layer and sintered. At the same time, the included angle of 30° can avoid adding supports in the insertion hole 200 of the draft tube, and the added support in the insertion hole cannot be removed. Keep a distance of 3-5mm between the guide vane and the substrate, and use support to suspend the part. After printing, wire cutting separates the ...
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Abstract
The invention discloses a process for preparing a guide vane by selective laser melting. The process comprises the following steps that S1, when a guide blade is placed, the powder laying direction ofa scraper is selected, the included angle between the upper end face and the lower end face of the guide blade and the X-Y horizontal plane is larger than 30 degrees, the distance between the guide blade and a base plate is kept 3-5 mm, a part is suspended in the air in a supporting mode, and after printing forming, the part is separated from the base plate through linear cutting; S2, model processing is performed on the guide vane by adopting a mode of combining blocky support and conical support; S3, a scanning strategy in a checkerboard mode is adopted, and regional bounce sintering is carried out; S4, process parameters are set; and S5, heat treatment is conducted, specifically, under the high-vacuum-degree condition, the temperature is increased to 1180 DEG C, heat preservation is conducted for one hour, and argon rapid cooling is conducted; and S6, surface treatment is conducted, specifically, after the part is printed and formed, the supporting part is removed. According to theinvention, the high-quality 3D printing high-temperature alloy guide blade formed through selective laser melting can be prepared, and the mechanical property, the surface quality and the forming precision are guaranteed.
Description
technical field [0001] The invention relates to the field of laser selective melting, in particular to a process for preparing guide blades by laser selective melting. Background technique [0002] With the rapid development of aerospace and military equipment, higher requirements are put forward for the performance, quality, production efficiency and yield of equipment parts. For the problems of unstable performance, quality, low production efficiency and low yield of products prepared by traditional production processes , need to adopt advanced rapid prototyping technology. The emergence of 3D printing technology has effectively solved this technical problem and can realize rapid prototyping of complex structures. Laser selective melting technology is the most widely used processing technology in the field of 3D printing. This technology does not require the use of tool holders, and can be directly formed. The traditional preparation process of guide vanes is precision ...
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