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Preparation method of solid welding wire for welding of nickel-based superalloys resistant to molten salt corrosion

A technology of nickel-based superalloy and solid welding wire, applied in welding equipment, welding medium, metal processing equipment, etc., can solve the problem of unusability, and achieve the effect of reducing loss, reducing content, and restoring the plasticity of welding wire

Active Publication Date: 2018-05-29
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The solder used for the welding of nickel-based superalloys resistant to molten salt corrosion has higher Ni content, more than 12% Mo element content, and relatively low Cr element (6.0%). The two have obvious differences in composition and characteristics, resulting in This method does not work at all

Method used

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  • Preparation method of solid welding wire for welding of nickel-based superalloys resistant to molten salt corrosion

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preparation example Construction

[0042] Aiming at the problem that the existing nickel-based alloy solid welding wire preparation process is difficult to produce solid welding wires for molten salt corrosion resistant nickel-based superalloy welding, the present invention provides a practical method for molten salt corrosion resistant nickel-based superalloy welding. The cored welding wire preparation method can mass-produce high-quality solid welding wires of various diameters for the welding of nickel-based superalloys resistant to molten salt corrosion at a high yield rate. The method includes the following steps:

[0043] 1) Vacuum smelting: Solder is configured and melted by vacuum induction and poured into electrode rods;

[0044] The solder can adopt existing or future formulations suitable for welding of nickel-based superalloys resistant to molten salt corrosion. In order to improve the welding quality, the present invention further proposes a preferred solder formula, the components of which are calcula...

Embodiment 1

[0062] The composition (mass percentage) of the solder in this embodiment is: C: 0.06%, Mn: 0.65%, Fe: 4.06%, Si: 0.44%, P: 0.0028%, S: 0.002%, Cu: 0.002%, Co : 0.14%, Cr: 6.89%, Mo: 17.2%, Re (rare earth element): 0.05%, Al: 0.03%, Ti: 0.01%, Nb: 1.5, and the rest is Ni.

[0063] The preparation process of the solid wire in this embodiment is as follows figure 1 As shown, the specific steps are as follows:

[0064] 1)Vacuum smelting: according to the components of the solder, all pure metals are used, and Fe, Ni, Cr, Mo are directly placed in the crucible; while the rest of the active and volatile Mn, Si, C, Re and other elements are placed In the feeder, after the charging is completed, vacuum is started. When the vacuum degree is below 10 to 2 Torr, it starts to send electricity to heat the charge. Due to the skin effect of the induced current, the charge is melted layer by layer, which is very conducive to degassing and degassing. Unless metal inclusions, usually maintain a h...

Embodiment 2

[0077] The composition (mass percentage) of the solder in this embodiment is: C: 0.053%, Mn: 0.69%, Fe: 4.25%, Si: 0.35%, P: 0.002%, S: 0.003%, Cu: 0.0022%, Co : 0.12%, Cr: 6.50%, Mo: 16.7%, Re: 0.045%, Al: 0.003%, Ti: 0.02%, Nb: 1.5, and the rest is Ni.

[0078] The preparation method of the solid welding wire of this embodiment is the same as that of the first embodiment.

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Abstract

The invention discloses a preparation method of a solid cored welding wire for molten-salt corrosion resistance nickel-base superalloy welding, and belongs to the technical field of metal welding. The method includes the technological processes of vacuum smelting, vacuum arc remelting, homogenization, hot forging cogging, hot rolling, solution treatment, acid pickling, coating, cold drawing, coating removal and bright annealing. The invention further discloses the solid cored welding wire for molten-salt corrosion resistance nickel-base superalloy welding. The solid cored welding wire is prepared through the method. Compared with the prior art, by the adoption of the method, high-quality solid cored welding wires of various diameters for molten-salt corrosion resistance nickel-base superalloy welding can be produced with the extremely-high rolling yield in a batch mode, and the prepared solid cored welding wire can meet the requirement for welding molten-salt reactor structural materials.

Description

Technical field [0001] The invention relates to the technical field of metal welding, in particular to a method for preparing a solid welding wire for welding corrosion-resistant nickel-based high-temperature alloys. Background technique [0002] In the fourth-generation nuclear energy system released by international organizations, molten salt reactors belong to one of six types of reactors, which have inherently high safety, flexible fuel cycle characteristics, the availability of thorium-based fuels, and the prevention of nuclear proliferation. China is currently making full efforts to develop thorium-based molten salt reactor nuclear energy systems, including solid fuel and liquid fuel. Both of these two types of molten salt reactors use molten salt as a coolant. Therefore, molten salt reactor structural materials must be resistant to Molten salt corrosion, high temperature resistance and radiation interaction. The foreign alloy resistant to molten salt corrosion is mainly H...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/40B23K35/30
CPCB23K35/3033B23K35/40
Inventor 黎超文李志军梁建平玉昆陈双建蒋力
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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