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Preparation method of ultra-large integral stainless steel reactor core shroud member of nuclear power station

A stainless steel, ultra-large technology, applied in the direction of additive manufacturing, process efficiency improvement, coating, etc., can solve the problems of high cost and long processing cycle, achieve short processing cycle, high material utilization rate, and reduce stress accumulation Effect

Active Publication Date: 2022-01-28
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the core shroud structure of the nuclear power plant is made of nuclear-grade stainless steel, the requirements for the chemical composition of the material are strict, and the processing procedures such as small-batch steelmaking and forging have long cycle times and high costs.

Method used

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  • Preparation method of ultra-large integral stainless steel reactor core shroud member of nuclear power station
  • Preparation method of ultra-large integral stainless steel reactor core shroud member of nuclear power station
  • Preparation method of ultra-large integral stainless steel reactor core shroud member of nuclear power station

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Embodiment 1

[0045] This embodiment provides a method for preparing a super-large integral stainless steel core shroud member of a nuclear power plant. The preparation method adopts such as figure 1 The laser cladding forming manufacturing system shown in the additive manufacturing forms the ultra-large integral stainless steel core shroud structure of the nuclear power plant.

[0046] The specific steps of the preparation method of this embodiment are as follows: figure 2 Shown:

[0047] Step S1, establishing a three-dimensional model of the ultra-large integral stainless steel core shroud structure of the nuclear power plant, segmenting the model in the axial direction, dividing each segment evenly in the circumferential direction, and slicing each block in the thickness direction layered.

[0048] In the present embodiment, the three-dimensional CAD model of the ultra-large integral stainless steel core shroud structure of the nuclear power plant is established in the computer 1; the...

Embodiment 2

[0063] In this embodiment, as image 3 The super large integral stainless steel core shroud structure shown in a nuclear power plant is taken as an example. The dimensions are: the outer diameter is Φ3600mm, the inner diameter minimum distance is 2500mm, and the height is 300mm (the thickness of the middle substrate is 40mm). The preparation method is processed, and the specific process includes:

[0064] (1) Establish the three-dimensional CAD model of the ultra-large integral stainless steel core shroud structure of the nuclear power plant in the computer 1; remove the middle 40mm thick substrate from the stainless steel core shroud structure model, and divide the two sides of the substrate into 2 sections, respectively 70mm, 60mm; each section is divided into 4 pieces in the circumferential direction, the angle of the overlapping surface between two adjacent pieces is 45°, and each piece is sliced ​​and layered according to the thickness of 0.8mm in the thickness direction....

Embodiment 3

[0078] In this embodiment, an ultra-large integral stainless steel core shroud structure of a nuclear power plant is taken as an example. The size is: Φ3700mm, the minimum inner diameter distance is 3000mm, and the height is 500mm (the thickness of the intermediate substrate is 60mm). A nuclear power plant according to the present invention is adopted. The preparation method of the ultra-large integral stainless steel core shroud structure is processed, and the specific steps are as follows

[0079] (1) Firstly, a three-dimensional CAD model of the stainless steel core shroud structure is established in the computer 1, and the stainless steel core shroud structure model is segmented by 50-70 mm, and the 60 mm thick substrate in the middle is removed, and both sides of the substrate are divided into 4 sections, They are 50mm, 50mm, 50mm, and 70mm respectively. Each section is divided into 4 pieces in the circumferential direction, and the angle of the overlapping surface between...

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Abstract

The invention discloses a preparation method of an ultra-large integral stainless steel reactor core shroud member of a nuclear power plant, which comprises the following steps of: establishing a three-dimensional model of an ultra-large integral stainless steel reactor core shroud member of a nuclear power plant, and segmenting, blocking and layering the model in the axial direction; machining a stainless steel reactor core shroud structure layer by layer through the laser cladding forming technology, so as to complete machining of one stainless steel reactor core shroud structure; machining stainless steel reactor core shroud structures one by one, so as to complete machining of one section of stainless steel reactor core shroud structures; machining stainless steel reactor core shroud structures section by section, so as to complete machining of the stainless steel reactor core shroud structure on one side; and machining a second-side stainless steel reactor core shroud structure on the symmetric surface of a substrate forming the stainless steel reactor core shroud structure on one side, and finally forming an ultra-large integral stainless steel reactor core shroud structure of a nuclear power station. According to the preparation method provided by the invention, the reactor core shroud structure with excellent mechanical properties is integrally formed through a laser cladding forming technology, the material utilization rate is high, and the machining period is short.

Description

technical field [0001] The invention belongs to the technical field of nuclear power equipment, and in particular relates to a preparation method of an ultra-large integral stainless steel core shroud member of a nuclear power plant. Background technique [0002] The core shroud structure is a new type of integral structure proposed in the key technology of optimization and improvement of the third-generation pressurized water reactor. It is large in size and complex in structure, and is a large stainless steel special-shaped structural part. The traditional method of preparing the core shroud structure is the method of forging blank + machining. Since the core shroud structure of nuclear power plants is made of nuclear-grade stainless steel, the chemical composition of the material is strictly required, and the processing procedures such as small-batch steelmaking and forging have long cycle times and high costs. Contents of the invention [0003] In order to overcome th...

Claims

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Application Information

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IPC IPC(8): B22F10/28B22F5/10C23C24/10B33Y10/00B33Y80/00
CPCB22F10/28B22F5/10C23C24/106B33Y10/00B33Y80/00Y02P10/25
Inventor 王庆田刘正武李燕罗英何培峰李浩郝云波杨洋于天达赵凯钟元章王仲辉胡雪飞邓朝俊胡朝威张翼曹奇锋
Owner NUCLEAR POWER INSTITUTE OF CHINA
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