Electroslag fusion casting manufacturing method for annular plate of hydraulic generator

A hydro-generator and electroslag casting technology, applied in the field of electroslag casting manufacturing, can solve the problems of inability to produce similar steel plates with high yield strength, increased use costs, steel waste, etc., and achieve excellent laminar tear resistance, cooling The effect of fast speed and reduced cutting volume
CN102416463AActive Publication Date: 2012-04-18沈阳市盛华特种铸造有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
沈阳市盛华特种铸造有限公司
Publication Date
2012-04-18

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Abstract

The invention discloses an electroslag fusion casting manufacturing method for an annular plate of a hydraulic generator. The method is characterized by comprising the following steps of: 1) controlling slag systems and slag amount; 2) igniting; 3) selecting a crystallizer; 4) rotating the crystallizer by using a control system; 5) selecting power supply parameters; 6) controlling casting alloy components after fusion casting; and 7) selecting a casting thermal processing process. A near-net-shape forming annular plate manufacturing technology is provided for producing annular anti-tear steel plates for hydraulic generator seat rings, top covers and bottom rings at present; a rotatable crystallizer is used for electroslag fusion casting formation, so that technical requirements on production of the annular plate are met; and the produced annular plate has high laminated tearing resistance, higher fatigue resistance and higher crack generation and expansion resistance, and the quality and the performance of the annular plate are not lower than those of a specially-forged product which is made of the same material as that of the annular plate.
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Description

Technical field

[0001] The invention relates to a process for producing a special anti-layered tearing steel plate, in particular to an electroslag casting manufacturing method that uses electroslag casting technology to produce ring plates for hydroelectric generators. Background technique

[0002] As the country attaches great importance to the adjustment of power construction structure and environmental protection, the active development of hydropower has become the guiding principle of my country's power industry construction. Hydropower is a renewable clean energy source, which is conducive to environmental protection. The development of hydropower and the improvement of the design, manufacturing and production capacity of large-scale high-head water turbine units are the requirements for promoting the development of the national economy and the development of the machinery industry.

[0003] In a hydraulic turbine, the volute seat ring, top cover and bottom ring are important...

Claims

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