Electro-welding additive manufacturing method of nuclear power station SAP refrigerator end covers

Abstract

The invention discloses an electro-welding additive manufacturing method of nuclear power station SAP refrigerator end covers. The method herein comprises: I, conveying raw metal wires to the surfaceof a base via a conveying mechanism and an electro-welding head, allowing the raw metal wires and the base to generate electric arcs under overlaying protection of an aid so that part of the overlaying aid is melted into a molten slag bath; II, allowing current to pass through the raw metal wires and the molten slag bath to generate resistance heat and slag heat, melting the raw metal wires underthe thermal composite high-energy heat action of arc heat, the resistance heat and the slag heat so that a local bath is formed in the surface of the base; III, conveying the raw metal wires and the aid continuously, controlling the welding head to move by a computer according to hierarchical slicing data so that layerwise overlaying of the bath is performed on the base to obtain a finished product. The method herein has high efficiency and good stability, and has no need for remanufacturing of molds; a manufactured end cover has good tissue characteristics and excellent mechanical properties.

Description

technical field [0001] The invention relates to a nuclear power plant refrigerator end cover, in particular to a nuclear power plant SAP refrigerator end cover electrofusion additive manufacturing method. Background technique [0002] The end cover of the SAP refrigerator in a nuclear power plant is an end cover on the inlet side of the evaporator of the SAP system refrigerator in a nuclear power plant. The SAP refrigerant is independent of the nuclear power plant and is used to deliver compressed air equipment, and its functionality is closely related to the operation safety of the nuclear power plant. , SAP refrigerant end cover, because of its complex structure, it is made of gray cast iron in foreign countries. At present, there is no manufacturer of this device in our country. [0003] If the end cover of the cast SAP refrigerator is cast in China, the mold needs to be remanufactured, and due to the limitation of the casting process, the end cover has disadvantages such...

AI Technical Summary

Problems solved by technology

[0002] The end cover of the SAP refrigerator in a nuclear power plant is an end cover on the inlet side of the evaporator of the SAP system refrigerator in a nuclear power plant. The SAP refrigerant is independent of the nuclear power plant and is used to deliver compressed air equipment, and its functionality is closely related to the operation safety of the nuclear power plant. , SAP refrigerant end cover, because of its complex structure, it is made of gray cast iron in foreign countries. At present, there is no manufacturer of this device in my country.

[0003] If the end cover of the cast SAP refrigerator is cast in China, the mold needs to be remanufactured, and due to the limitation of the casting process, the end cover has disadvantages such as coarse grains, poor performance, and many shrinkage cavities.

In addition, the material of the end cover of the general SAP refrigerator is gray cast iron, which causes problems such as difficult repair and short service life.

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