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Centrifugal casting process for main pipeline of million kilowatt-grade nuclear power plant

A centrifugal casting, nuclear power plant technology, applied in the direction of manufacturing tools, casting molding equipment, casting molds, etc., can solve the problem that the centrifugal casting process cannot be satisfied

Active Publication Date: 2011-11-09
烟台台海玛努尔核电设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The centrifugal casting process as the prior art cannot meet the above requirements

Method used

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  • Centrifugal casting process for main pipeline of million kilowatt-grade nuclear power plant
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  • Centrifugal casting process for main pipeline of million kilowatt-grade nuclear power plant

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Embodiment Construction

[0037] The present invention will be further described below with reference to the drawings and embodiments.

[0038] The following are specific examples of the centrifugal casting process of the present invention.

[0039] 1. Smelting

[0040] Smelting uses 5t electric arc furnace + 15t electric arc furnace + AOD furnace, or 15t electric arc furnace + AOD furnace.

[0041] 1. When using 5t electric arc furnace + 15t electric arc furnace + AOD furnace for smelting,

[0042] (1) When the 5t electric arc furnace supplies low-phosphorus molten steel to the 15t electric arc furnace, the 5t electric arc furnace uses oxidation method for smelting, and the 5t electric arc furnace uses pure iron, scrap steel pipe heads, carbon blocks and other raw materials to ensure that the composition of the 15t electric arc furnace meets the relevant requirements. Requirements, where P≤0.003%;

[0043] (2) When a 5t electric arc furnace is used to provide molten steel to the AOD furnace, the weight of the 5...

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Abstract

The invention relates to a centrifugal casting process for a main pipeline of a million kilowatt-grade nuclear power plant. The centrifugal casting process comprises the main steps of smelting, cylinder coating, centrifugal casting, heat treatment and the like, wherein the tapping temperature of pressure molten steel is 1,640+ / -10 DEG C; after a cylinder is coated, the cylinder is roasted to the temperature of more than or equal to 280 DEG C and heat is preserved for 1 to 2 hours; the temperature of pouring steel is 1,570+ / -10 DEG C; the calming time is not less than 4 minutes; the rotating speed of the cylinder is controlled to be 800 to 870 r / min; and the casting speed is more than or equal to 100 kg / s. In the centrifugal casting process, process parameters and the process are controlled strictly, so the main pipeline capable of meeting the requirements of the million kilowatt-grade nuclear power plant can be manufactured.

Description

Technical field [0001] The invention belongs to the technical field of special casting. Specifically, it is a centrifugal casting process for the main pipeline of a million-kilowatt nuclear power plant. Background technique [0002] The reactor cooling system (also known as the primary circuit) of the pressurized water reactor nuclear power plant is a nuclear primary equipment system located in the nuclear island, which is responsible for the function of transmitting the heat generated by the reactor to the steam generator. Because the primary circuit coolant directly enters and exits the nuclear reactor, it has radioactive pollution, so its reliability is very high. [0003] The operating conditions of the primary loop are harsh, with 280-320°C, 150-160 atmospheres and corrosive media (the reactor coolant contains boric acid, etc.), so the requirements for materials and manufacturing technology are very high. The main pipe material is stainless steel and is made by centrifugal c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D13/00C21D9/08B22C3/00
Inventor 王根启李政军赵天明徐志强
Owner 烟台台海玛努尔核电设备有限公司
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