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Forming method of silver welding sheet for steam turbine blade brazing special-shaped Stellite alloy sheet

A steam turbine blade and forming method technology, which is applied in the field of brazing alloy sheets of steam turbine blades, can solve problems such as poor lamination of alloy sheets, large forming springback rate, and poor dimensional consistency, and achieve the effect of solving large forming springback rate

Active Publication Date: 2018-01-02
WUXI TURBINE BLADE
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for forming a silver solder sheet for brazing special-shaped Stellite alloy sheets of steam turbine blades, so as to solve the problem that the thin silver solder sheet in the prior art has a large molding rebound rate at room temperature and has consistent dimensions after manual molding. Problems such as poor bonding of silver solder sheet, alloy groove, and alloy sheet caused by poor performance

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  • Forming method of silver welding sheet for steam turbine blade brazing special-shaped Stellite alloy sheet
  • Forming method of silver welding sheet for steam turbine blade brazing special-shaped Stellite alloy sheet
  • Forming method of silver welding sheet for steam turbine blade brazing special-shaped Stellite alloy sheet

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Embodiment Construction

[0023] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0024] see Figure 1 to Figure 4 Shown, in the present embodiment, a kind of molding method of steam turbine blade brazing special-shaped Stellite alloy sheet is used the silver solder sheet, and it comprises the following steps:

[0025] Processing of molding dies: the square steel is processed into a simulated blade by mechanical processing, and a part of the simulated blade is taken as the lower mold 1, and this part is the part of the blade containing the alloy groove 10, and the alloy groove 10 of the simulated blade is required It should be consistent with the alloy groove of the real blade. Select a complete Stellite alloy sheet (3D alloy sheet), and use wire cutting or other mechanical processing methods to cut off the 3D part of the 3D alloy sheet. The cutting position is located near the ...

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Abstract

The invention discloses a forming method for a sliver welding plate for a brazed specially-shaped Stellite alloy plate for a steam turbine blade. The forming method comprises the following steps: processing of a forming mould: milling and processing out an alloy slot shape through square steel as a lower mould, and linearly cutting the 3D part of the Stellite alloy plate as an upper mould; pre-forming: unloading the sliver welding plate according to needs, putting the sliver welding plate on an alloy slot, and pressing the sliver welding plate by use of U-type pliers; forming: heating the lower mould at a heating temperature of 100-500 DEG C; under action of external force, fitting the 3D part of the alloy plate to the alloy slot; cooling: cooling to the room temperature in air; and grinding: completing the forming after grinding the sliver welding plate to have metallic luster. The forming method effectively solves the problem that the sliver welding plate, the alloy slot and the alloy plate are fitted bad due to a large forming resilience rate, at the room temperature, of the thin sliver welding plate, and poor dimension consistency after manual forming, and meets the sliver welding plate filling requirements during brazing of the 3D alloy plate very well.

Description

technical field [0001] The invention belongs to the steam turbine blade brazing alloy sheet technology, in particular to a forming method of a silver welding sheet used for steam turbine blade brazing special-shaped Stellite alloy sheet. Background technique [0002] A piece of hard stellite alloy sheet with good corrosion resistance is brazed on the steam inlet side of the steam turbine blade, which can effectively slow down the water erosion of the blade during operation. With the development of anti-corrosion technology for steam turbine blades, in order to improve the water-corrosion resistance of the blades, the appearance and shape of this cemented carbide sheet are becoming more and more complex according to the needs of the anti-corrosion area. [0003] Stellite alloy sheets are often connected to the blade body by brazing. The process of brazing the Stellite alloy sheet is: heating the blade body, the alloy sheet and the silver solder sheet until the silver solder ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 毛志刚汤先辉王进王烜烽滕树新
Owner WUXI TURBINE BLADE
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