Ultra-high strength steel in-situ wire-powder composition-adjustable composite additive device

Abstract

The invention provides an ultra-high strength steel in-situ wire-powder composition-adjustable composite additive device. The device comprises a plasma arc generating mechanism, a paraxial air powderconveying mechanism, a wire feeder and a vibrating mechanism, wherein the paraxial air powder conveying mechanism comprises a paraxial air powder cover, a spiral air powder groove is formed in the airpowder cover, an annular funnel filter is arranged in the air powder cover, and an aperture adjusting switch valve is arranged at the lower end of the air powder cover. According to the composite additive device, a set vibration and airflow composite mode is adopted in a gun body, quantitative opening of a plurality of preset alloy powders is achieved, the powders are spirally mixed in an decelerated mode, sieved and uniformly mixed, and the uniform powders are sent out of the gun body; and through the vibration and air flow composite powder feeding and the plasma flow force composite driving, the preset alloy uniformly-mixed powders and a conventional wire material with a set wire feeding speed are compounded below the gun body and then conveyed into a molten pool through a paraxial shaft, and additively manufactured into multi-component alloy materials under the stirring force of the molten pool. The device can produce composite components with adjustable composition in different areas of a metal matrix according to different requirements through additive manufacturing.

Description

technical field [0001] The invention belongs to the technical field of arc additive manufacturing, in particular to a super-strength steel in-situ wire powder composition adjustable composite additive device. Background technique [0002] Additive manufacturing technology refers to a scientific and technological system that is based on the principle of discrete accumulation and is driven by the three-dimensional data of the part to directly manufacture parts. It is based on the 3D (3Dimensions) design model, and the material is fixed point by layer by controlling the high-energy beam according to the demand. Build up to form solid parts. Compared with traditional methods such as casting technology and machining methods, arc wire feeding additive manufacturing technology has simplified procedures, improved material utilization, reduced production costs, and low machining difficulty. At the same time, it can control macroscopic defects and composition segregation in parts. Th...

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Problems solved by technology

However, the interior of the conical nozzle is only designed as a smooth surface, but no other structures that are conducive to powder feeding, powder mixing, and powder control are designed, and there is no external mechanism to ensure the amount and rate of powder falling; and because The aperture of its small hole is fixed and not adjustable, so it cannot control the feeding amount of powder; and the function of powder mixing is not considered, so the powder sent may be uneven, resulting in uneven alloy composition; because it only It can convey a variety of powders that have been mixed, so the addition ratio of ingredients cannot be adjusted; since the powders are all sent by the powder feeder, the powder feeding rate cannot be effectively controlled

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