Forging method for the main shaft of the large-scale conjoined flange fan with full fiber structure
A one-piece flange and full-fiber technology, applied in the field of forging, can solve the problems that the flange structure and the shaft body cannot be integrally forged, the balance of the main shaft of the fan is poor, and it is easy to shake in production, so as to reduce raw material consumption, eliminate poor balance, and improve The effect of production efficiency
Active Publication Date: 2016-12-28
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 the fan due to the inability to integrally forge the flange structure and the shaft body in the existing forging process of the main shaft of a large-scale flange fan. It is easy to produce jitter, noise and even fracture defects
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[0032] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0033] Forging process of 35CrMoReA large one-piece flange blower main shaft, including steps:
[0034] a. Material control: Steel ingots smelted by electric arc furnace + smelted outside the furnace + vacuum degassed are selected as raw materials. The selected material is 35CrMoReA, which conforms to Q / HWG-GW07010-2000, and guarantees that S≤0.025, P≤0.025, H≤2ppm, Q≤35ppm, N≤65ppm, Re=0.08-0.12;
[0035] b. If figure 1 As shown, the steel ingot is loaded into a heating furnace with a temperature lower than 450°C for heat preservation and heating. The heating process is: hold at 450°C for 5 hours, heat up at 60°C per hour to 650°C, hold for 4 hours, then heat up at 60°C per hour to 850°C, hold for 5 hours, and finally heat up at 80°C per hour to 1220°C 12 hours at 1220±10 for 12 hours;
[0036] c. Take the heated steel ingot out of the f...
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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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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