All-fiber-texture large-size one-piece flange fan main shaft forging method

A one-piece flange, full-fiber technology, applied in the field of forging, can solve the problems of the flange structure and the shaft body cannot be integrally forged, the balance of the fan spindle is poor, and it is easy to produce jitter, so as to reduce the consumption of raw materials, eliminate the poor balance, and improve the The effect of production efficiency

Active Publication Date: 2014-12-03
陕西华威科技股份有限公司
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Problems solved by technology

[0004] The main purpose of the present invention is to provide a method for forging the main shaft of a large-scale conjoined flange fan with full fiber structure, so as to solve the problem of poor balance of the main shaft of t

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  • All-fiber-texture large-size one-piece flange fan main shaft forging method
  • All-fiber-texture large-size one-piece flange fan main shaft forging method
  • All-fiber-texture large-size one-piece flange fan main shaft forging method

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[0032] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0033] The forging process of the 35CrMoReA large-scale conjoined flange blower main shaft includes steps:

[0034] a. Material control: select steel ingots smelted by electric arc furnace + smelting outside the furnace + vacuum degassing as raw materials. Choose the material 35CrMoReA, in line with Q / HWG-GW07010-2000, ensure S≤0.025, P≤0.025, H≤2ppm, Q≤35ppm, N≤65ppm, Re=0.08-0.12;

[0035] b, such as figure 1 As shown, the steel ingot is charged into a heating furnace with a temperature lower than 450°C for heat preservation and heating. The heating process is: heat preservation at 450°C for 5 hours, heat at 60°C per hour to 650°C, hold for 4 hours, then heat at 60°C per hour to 850°C, hold for 5 hours, and finally heat up at 80°C per hour to 1220°C When the temperature is equal to 3 hours, keep it at 1220±10 for 12 hours;

[0036] c. Take the heated steel ingo...

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Abstract

The invention discloses an all-fiber-texture large-size one-piece flange fan main shaft forging method which comprises the following steps of material selection, heating, primary firing forging, secondary firing forging, heat treatment after forging, rough turning, ultrasonic flaw detection, hardening and tempering, semifinishing, lossless flaw detection, body sampling, mechanical property testing and stable heat treatment. Compared with the conventional twice-forging and welded flange main shaft production method, the all-fiber-texture large-size one-piece flange fan main shaft forging method has the advantages that the welding working procedures are reduced, the time is saved, the raw material consumption is reduced, and the production cost is lowered; a forged flange main shaft is of an all-fiber-texture structure, so that the natural defects that the welded flange is low in balance property and easy to deform and the root is easy to break are totally overcome; a requirement of a large-size fan on the main shaft design is met.

Description

technical field [0001] The invention belongs to the technical field of forging, and relates to a method for forging a main shaft of a full-fiber tissue large-scale conjoined flange fan. Background technique [0002] In recent years, with the large-scale development of equipment in petrochemical, metallurgy, mining and other industries, the quality requirements for large-scale blower spindle forgings are getting higher and higher, thus putting forward higher requirements for the production and processing methods of large-scale blower spindle forgings . [0003] The traditional large-scale blower main shaft production is to divide the middle flange and the main shaft into two parts, and then weld the middle flange to the main shaft after rough machining, which cannot make it an integral forging, let alone guarantee the consistency of its fiber structure. Due to the fact that the residual stress cannot be completely removed when the flange part is welded, the overall structure...

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Application Information

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IPC IPC(8): B23P15/00B21K1/06B21J1/06
CPCB21J1/06B21J5/002B21J5/06B21J5/08B21K1/06B23P15/14C21D9/28
Inventor 王璋
Owner 陕西华威科技股份有限公司
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