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Method for forging wind power generation spindle

A spindle and forging technology, which is applied in the forging field of wind turbine spindles, can solve the problems of ineffective control of forging precision, large gas and electric energy consumption, and high labor intensity of employees, so as to save gas and electric energy consumption and reduce labor Strength and production cost, effect of saving forging time

Inactive Publication Date: 2015-09-09
ZHONGYUAN SPECIAL STEEL
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Problems solved by technology

There are many disadvantages in this forging method: the traditional forging method requires many times of heating, which leads to increased fire consumption of forgings, large gas and electric energy consumption, long forging time, low forging efficiency, high labor intensity of employees, and poor forging accuracy. Effective control is not conducive to the future development trend of energy conservation and emission reduction

Method used

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  • Method for forging wind power generation spindle
  • Method for forging wind power generation spindle
  • Method for forging wind power generation spindle

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] A method for forging a main shaft for a wind power generator, where the main shaft for a wind power generator refers to a 2.0MW wind power main shaft, and the forging method includes the following steps:

[0026] Step 01: The selected steel ingot must be the steel ingot raw material smelted by electric furnace smelting + LF (outside furnace refining) + VD (vacuum degassing) smelting process; the selected material is 42CrMoA, according to the requirements of standard EN10083-1, 0.40%≤C≤ 0.45%, Si≤0.40%, 0.60%≤Mn≤0.80%, S≤0.15%, P≤0.20%, 1.00%≤Cr≤1.20%, 0.4%≤Ni≤0.60%, 0.18%≤Mo≤0.30%, Where [H]≦2.0ppm; [O]≦25ppm;

[0027] Step 02: Based on figure 1 , 2 , for steel ingots whose surface temperature is greater than 550°C are loaded into the furnace and then directly heated to 1250±10°C according to the maximum power of the furnace...

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Abstract

The invention relates to a method for forging a wind power generation spindle. The method comprises the step 01 of selecting and adopting a steel ingot having sequentially undergone electric furnace smelting, external refining and vacuum degassing smelting to serve as a raw material, performing hot cutting on a steel ingot tail; the step 02 of feeding the steel ingot to a furnace and heating the steel ingot to an initial forging temperature of 1250+ / -10 DEG C, performing heat insulation for 7-10 h and then discharging the steel ingot out of the furnace and forging the steel ingot; the step 103 of performing primary heating, performing upsetting twice and performing drawing-out twice and then forming preformed blank, namely T-shaped blank; the step 04 of performing secondary heating and finish forging forming; the sep 05 of performing air cooling, and performing post-forge air cooling, normalizing twice and tempering heat treatment on a forged piece; the step 106 of taking the forged piece out of an annealing furnace, enabling the forged piece to undergo the whole body 100% black skin ultrasonic flaw detection, performing rough machining after the ultrasonic flaw detection passes, and performing 100% nondestructive detection on the forged piece after the forged piece undergoes the rough machining and comes to light; and the step 07 of performing hardening and tempering. The method for forging the wind power generation spindle reduces plenty of gas and electric energy consumption and improves working efficiency and forging quality.

Description

technical field [0001] The invention belongs to the technical field of forging production, and relates to a forging method of a main shaft for a wind power generator. Background technique [0002] At present, with the rapid development and maturity of the wind power industry in my country, the main shaft of wind power generation has developed towards the megawatt level, and the quality requirements for its forgings are getting higher and higher. Higher requirements are put forward for the design and manufacture of wind power main shafts and forging production methods. Require. [0003] The current mainstream wind power spindle forging method still adopts the traditional forging process and post-forging heat treatment process. There are many disadvantages in this forging method: the traditional forging method requires many times of heating, which leads to increased fire consumption of forgings, large gas and electric energy consumption, long forging time, low forging efficie...

Claims

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Application Information

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IPC IPC(8): B21K1/06
CPCB21K1/06
Inventor 曹启航徐群曹鹏敏王子君
Owner ZHONGYUAN SPECIAL STEEL
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