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Forming method of GH99 alloy stiffening-ribbed cover plate

A technology of GH99 and ribs, which is applied in the field of additive manufacturing, can solve the problems of difficult machining, low material utilization rate, shrinkage and other problems, and achieve the minimization of deformation and cracking tendency, the minimization of comprehensive manufacturing cost, and the partial fine structure up to standard Effect

Active Publication Date: 2019-01-25
BEIJING HANGXING MACHINERY MFG CO LTD
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Problems solved by technology

[0005] The existing technology has defects such as shrinkage and inclusions that are prone to occur in casting; die forging requires a large-tonnage press, and the high temperature shortens the life of parts such as molds and workbenches, and greatly increases the manufacturing cost of a single piece; for GH99 alloys that have Expensive metal materials with high mechanical properties, serious tool loss, difficult machining, long cycle time, and low material utilization rate greatly increase the manufacturing cost

Method used

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  • Forming method of GH99 alloy stiffening-ribbed cover plate
  • Forming method of GH99 alloy stiffening-ribbed cover plate

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example

[0036] Example: arc additive manufacturing + laser direct deposition forming GH99 alloy cover plate with ribs.

[0037] The specific implementation method is: the GH99 alloy structural parts required to be manufactured, such as figure 2 , the main part is a 1 / 3 hollow cylinder with uniform wall thickness, with an inner diameter of 300mm, a wall thickness of 10mm, and a height of 875mm. Finally, a composite manufacturing scheme was selected, which formed the main part by arc additive manufacturing technology and formed internal ribs by laser direct deposition technology.

[0038] The raw material used is ф1.6mm GH99 alloy welding wire; a set of suitable forming process parameters is obtained through experiments first: welding current 200A, wire feeding speed 10m / min, welding speed 6mm / s; under this set of process parameters, single pass welding The width of the seam is 14mm, and the height is 1.5mm; polish the pickled base plate and wipe it clean with absolute ethanol or acet...

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Abstract

The invention belongs to the field of additive manufacturing and relates to a forming method of a GH99 alloy stiffening-ribbed cover plate. The forming method includes the steps of printing a physicalportion, except for stiffening ribs, by means of arc additive manufacturing; performing machining of reinforcing rib parts to be added; forming the reinforcing ribs by means of laser direct deposition. The forming method provided herein makes full use of the characteristics of the arc additive manufacturing, such as high efficiency, low cost, and the characteristic of laser direct deposition, such as high precision, so as to form the GH99 alloy stiffening-ribbed cover plate in near-net forming manner; inner quality of the GH99 alloy stiffening-ribbed cover plate meets the requirements on application technical indexes, with the mechanical properties reaching and exceeding those of like-component castings; production cycle is greatly shortened, and comprehensive manufacturing cost is lowered.

Description

technical field [0001] The invention relates to a forming method of a GH99 alloy ribbed cover plate, which belongs to the field of additive manufacturing. Background technique [0002] With the development of a new generation of weapons and equipment, high-performance materials are widely used, the development cycle of equipment is significantly shortened, and the development cost needs to be strictly controlled, which undoubtedly puts forward higher requirements and challenges for manufacturing technology. [0003] For example, the GH99 alloy cover plate with ribs in a certain weaponry needs to be formed at a temperature of about 1000°C by high-temperature die forging, and there are problems such as deformation, rapid wear and oxidation corrosion of the mold and worktable; For the expensive metal material with high mechanical properties such as GH99 alloy, the tool loss is serious, the machining is difficult, the cycle is long, and the material utilization rate is low, whic...

Claims

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Application Information

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IPC IPC(8): B23P15/00B23K35/38B33Y10/00
CPCB23K35/383B23P15/00B33Y10/00
Inventor 何智姚为王志敏吴复尧张云鹏殷凤良胡洋步贤政张铁军
Owner BEIJING HANGXING MACHINERY MFG CO LTD