Forging process of main stainless-steel pipeline for nuclear power

A main pipe and stainless steel technology, applied in the field of forging, can solve the problems that it is not easy to meet the design size requirements, the heat treatment method cannot be used, and the shape of the forging is complicated, so as to overcome the tendency of hot cracking, ensure the design size requirements, and improve the surface quality.

Active Publication Date: 2012-12-19
ANSTEEL HEAVY MACHINERY CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] 2) 316LN is austenitic stainless steel. After forging, heat treatment cannot be used to refine the grains, and the grains can only be refined by forging deformation.
[0006] 3) The shape of

Method used

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  • Forging process of main stainless-steel pipeline for nuclear power
  • Forging process of main stainless-steel pipeline for nuclear power
  • Forging process of main stainless-steel pipeline for nuclear power

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Embodiment Construction

[0063] The present invention will be further described below in conjunction with embodiment:

[0064] The invention is a stainless steel nuclear power main pipeline forging process, which adopts 316LN electroslag ingot blank, controls its harmful components S≤0.005% and P≤0.025% during smelting, and heat-cleanes surface cracks in time during the forging process to improve Forging surface quality, its components include hot section L001A, hot section L001B, cold section A, cold section B, cold section C, cold section D, undulating tube I, undulating tube II, undulating tube III, undulating tube IV, undulating tube V has eleven sections. According to different structures and different mechanical performance requirements, the forging process of the above components is divided into hot section L001A, hot section L001B, cold section group, wave tube IIIV group, and wave tube IIIIV group.

[0065] See figure 1 , figure 2 , image 3 , Figure 4 , showing that the operation steps...

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Abstract

The invention relates to a forging process of a main stainless-steel pipeline for nuclear power. The forging process is characterized in that a 316LN electroslag ingot blank is adopted; heat cleaning is carried out on surface cracks in time in the forging process, and a forging ratio is guaranteed to be more than 4; construction members needed by the forging process comprise a hot leg L001A, a hot leg L001B, a cold leg A, a cold leg B, a cold leg C, a cold leg D, a wave pipe I, a wave pipe II, a wave pipe III, a wave pipe IV and a wave pipe VII; and the forging process of the construction members is grouped into the hot leg L001A, the hot leg L001B, a cold leg group, a wave pipe group including the wave pipes I, II and V, and a wave pipe group including the wave pipes III and IV. Compared with the prior art, the process disclosed by the invention has the beneficial effects of reducing the production heating number of a forge piece to a great extent, improving the production efficiency, guaranteeing the design size requirements on the forge piece, overcoming the heat crack tendency of the surface of the blank and improving the surface quality of the main pipeline through the timely heat cleaning in the forging process, and realizing the 100% localization of key equipment of the nuclear power.

Description

technical field [0001] The invention relates to the technical field of forging, in particular to a forging process of a stainless steel nuclear power main pipeline. Background technique [0002] The core of the widely used "passive pressurized water reactor nuclear power technology" is that the nuclear fuel made of uranium is fissioned in the "reactor" equipment to generate a large amount of heat energy, and then the heat energy is taken out by water under high pressure. Steam is generated in the steam generator, and the steam drives the steam turbine to rotate with the generator, and electricity is continuously generated and sent to all directions through the grid. The main pipeline of a nuclear power plant is a large thick-walled pressure-bearing pipeline connecting the reactor pressure vessel and the steam generator. It is the "main artery" for the nuclear steam supply system to output core heat energy, and it is one of the nuclear first-level key equipment of the pressur...

Claims

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Application Information

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IPC IPC(8): B21K1/14
Inventor 朴振胜宋嘉欣冷永炎孙凤先宋恩余高扬
Owner ANSTEEL HEAVY MACHINERY CO LTD
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