Forging method for water chamber head of steam generator of third-generation nuclear power station

A technology of steam generator and water chamber head, applied in metal processing equipment and other directions, can solve the problems of complex shape, large diameter, inability to manufacture forgings, etc., achieving less metal cutting, not easy to fold, reducing the difficulty of processing and manufacturing. cost effect

Inactive Publication Date: 2012-07-11
SHANGHAI HEAVY MACHINERY PLANT
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Problems solved by technology

Due to the large diameter and complex shape (straight section + arc + nozzle) of the reactor steam generator (SG) water chamber head forging in the new generation nuclear power reactor AP1000 project, traditional forging methods cannot be used to manufacture close to such a shape Forgings

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  • Forging method for water chamber head of steam generator of third-generation nuclear power station
  • Forging method for water chamber head of steam generator of third-generation nuclear power station
  • Forging method for water chamber head of steam generator of third-generation nuclear power station

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Embodiment Construction

[0024] like Figure 7 Shown, the forging method of the water chamber head of the steam generator of the third generation nuclear power plant of the present invention is used for forging the water chamber head of the steam generator of the third generation nuclear power plant. The structure of the water chamber head is as follows figure 1 As shown, the radius of the inner spherical surface is 1989mm, the wall thickness of the head is 254mm, and the height is 1658mm, which includes curved sections, straight sections and nozzles; the present invention adopts a 10,000-ton free forging press, as figure 2 The double vacuum ingot shown is the raw material, and the forging process is divided into the following steps:

[0025] The first step is to open the billet; figure 2 The shown double vacuum steel ingot removes the riser, the riser removal amount is ≥ 18%; the bottom is removed, the bottom removal amount is ≥ 7%; to ensure that the double vacuum steel ingot has sufficient remov...

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Abstract

The invention discloses a forging method for a water chamber head of a steam generator of a third-generation nuclear power station, which is used for forging the water chamber head of the steam generator of the third-generation nuclear power station. The internal spherical radius of the water chamber head is no less than 1500mm, the water chamber head comprises a bent section, a straight section and a nozzle, and double vacuum steel ingots are used as raw materials. The forging process includes the steps: firstly, cogging; secondly, combined forging; and thirdly, rotating extrusion. A megaton free forging press is used for forging the double vacuum steel ingots into cylindrical billets, and then the internal shape of a forging is forged by means of rotating extrusion through a mould. The forging manufactured by the forging method can meet the technical requirement of the water chamber head, water chamber head forging materials are compact, reasonable in metal flow line distribution and not easy to crack, difficulty in machining is reduced, metal cutting output is less, and machining difficulty and cost can be reduced.

Description

technical field [0001] The invention relates to a forging method of nuclear power equipment, in particular to a forging method of a water chamber head of a steam generator of a third-generation nuclear power plant. Background technique [0002] In recent years, power shortage has become a bottleneck restricting the sustained and rapid economic development of various countries. As an important measure to save energy and adjust energy structure, nuclear power has been included in the national power development plan. The global nuclear power has entered a period of rapid development, in order to improve the energy structure, industrially developed countries and developing countries are actively committed to the development of nuclear power. [0003] At present, nuclear power technology is developing in the direction of large-scale, and the manufacture of key equipment in third-generation nuclear power plants requires the use of super-large forgings. Due to the large diameter a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21J1/00
Inventor 陶志勇宋雷钧乔志洲孟凡旺
Owner SHANGHAI HEAVY MACHINERY PLANT
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