Preparation method of solid cored welding wire for molten-salt corrosion resistance nickel-base superalloy welding

A technology of nickel-based superalloy and solid welding wire, applied in welding equipment, welding medium, metal processing equipment, etc., can solve problems such as unusable, reduce loss, reduce high temperature oxidation and forging/rolling cracks, restore welding wire plastic effect

Active Publication Date: 2016-12-07
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • 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

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  • Preparation method of solid cored welding wire for molten-salt corrosion resistance nickel-base superalloy welding

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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 wire for molten salt corrosion-resistant nickel-based superalloy welding, the present invention proposes a practical method for molten salt corrosion-resistant nickel-based superalloy welding. The preparation method of the cored wire can mass-produce high-quality, various-diameter solid-cored wires for welding nickel-based superalloys resistant to molten salt corrosion with a very high yield. The method includes the following steps:

[0043] 1) Vacuum smelting: configure solder, and vacuum induction smelting, casting into electrode rods;

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

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 solid welding wire in the present embodiment is as follows: figure 1 As shown, the specific steps are as follows:

[0064] 1) Vacuum smelting: ingredients are prepared according to the solder components, all of which are pure metals, and Fe, Ni, Cr, Mo are directly placed in the crucible; while other active and volatile elements such as Mn, Si, C, Re are placed in the crucible. In the feeder, after the charging is completed, vacuuming is started, and when the vacuum degree reaches below 10 to 2 torr, electricity is started 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 degassi...

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 in this embodiment is the same as that in Embodiment 1.

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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 core wire used for welding a nickel-based superalloy resistant to molten salt corrosion. Background technique [0002] Among the fourth-generation nuclear energy systems released by international organizations, the molten salt reactor is one of the six reactor types, which has high inherent safety, flexible fuel cycle characteristics, availability of thorium-based fuel, and nuclear proliferation prevention. China is currently making every effort to develop a thorium-based molten salt reactor nuclear energy system, including solid fuel and liquid fuel. However, both forms of molten salt reactors use molten salt as a coolant, so the structural materials of the molten salt reactor must be durable Molten salt corrosion, high temperature resistance and radiation interaction. Foreign alloys resistant to molten salt corrosion are mainly Hastelloy N ...

Claims

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Application Information

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Patent Type & Authority Applications(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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