Extrusion forming method for blade made of GH2787 high-temperature alloy

A technology of GH2787 and high-temperature alloys, which is applied to engine components, mechanical equipment, etc., can solve the problems of high cost, large number of tooling, and long manufacturing cycle, so as to improve utilization rate, save tooling design and manufacturing, and save tooling manufacturing costs. Effect

Active Publication Date: 2014-02-19
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the available information, domestic blades are all made of blanks and then forged. The number of tooling is large, the manufacturing cycle is long, and the cost is high.

Method used

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  • Extrusion forming method for blade made of GH2787 high-temperature alloy
  • Extrusion forming method for blade made of GH2787 high-temperature alloy

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Embodiment Construction

[0019] Technical scheme of the present invention comprises the following parts;

[0020] 1) Heating technology for forgings: During the heating process of superalloys for many times, the carbon, boron and other alloy elements on the surface of forgings are easily ablated and depleted, and even induce the coarsening of grains on the surface of forgings, resulting in a decrease in tensile plasticity and impact toughness , the high temperature is significantly reduced for a long time. In order to obtain the ideal microstructure and properties, and the surface oxidation and element depletion of precision forged blades must be strictly controlled due to the small margin, the heating system of the forging must be studied. Through a large number of process tests, it is determined to use electric furnace heating. Due to the thermal effect during the extrusion process of the high-speed hammer, the temperature of the parts will increase by 50-70°C. Considering that the extrusion blade b...

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Abstract

The invention discloses an extrusion forming method for a blade made of GH2787 high-temperature alloy. The extrusion forming method comprises the first step of heating a billet electric furnace to 1000-1050 DEG C, keeping the temperature for 3 minutes and performing direct extrusion forming on the blade, wherein according to the deformation amount of the blade, the head of the blade is 20%-30%, and the extrusion ratio of the body of the blade is 5-7; the second step of clearing the surface of a forge piece in a grit-blasting mode, the third step of performing vibrating finishing, clearing the surface of the forge piece and improving the roughness and light integrity of the surface of the forge piece, and the fourth step of performing solution treatment and aging treatment on the forge piece, wherein the temperature of the solution treatment is 940+ / -10 DEG C and is kept for 1-2 hours, then air cooling is performed on the forge piece, the temperature of the aging treatment is 780+ / -10 DEG C and is kept for 16 hours, and finally air cooling is performed on the forge piece. Compared with a traditional precision forging forming technology, the extrusion forming method has the advantages that four sets of tool design and manufacture are saved, the costs of the tool manufacture are saved by close to RMB 80,000 yuan, and meanwhile the preparation time of the blade is shortened; due to the facts that the forge piece of the blade is designed by adopting the method of adding allowance in equal proportion, and the allowance for machining the single surface of the blade is only 0.3+ / -0.2mm, the use rate of the material is enhanced.

Description

technical field [0001] The invention relates to the technical field of high-temperature alloy blade precision forging forming, in particular to a blade extrusion forming process. Background technique [0002] The high-temperature alloy forged blade made of GH2787 is characterized by large edge plate, thin airfoil profile, small front and rear edge thickness, high alloying degree of blade material, and the follow-up process of blade supporting processing is cold rolling process, which affects the forging Machining allowance, dimensional accuracy and surface quality requirements are all very high. These factors increase the difficulty of blade forging and forming. Therefore, blade forging and forming need to adopt new technology to meet the needs of blade forming. According to the available information, domestic blades are all made of billets and then forged. The number of tooling is large, the manufacturing cycle is long, and the cost is high. Contents of the invention [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K3/04B21J3/00
Inventor 关红邰清安崔树森汪大成国振兴
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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