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Nickel-based alloy welding strip and preparation method and application thereof

A nickel-based alloy and welding strip technology, which is applied in welding equipment, metal processing equipment, manufacturing tools, etc., to achieve the effect of improving high-temperature tensile properties, good surface quality, and ensuring uniformity

Pending Publication Date: 2022-07-15
宝武特种冶金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Through the above comparison, it is found that there is no publicly available nickel-based alloy and its manufacturing method that meet the requirements of welding strips for nuclear island equipment. Therefore, it is necessary to design targeted alloy compositions and more reasonable processing techniques to manufacture nickel-based alloy welding strips. To make the weld metal have more excellent properties, especially high-temperature tensile properties, to meet the strict requirements of the nuclear island equipment service environment

Method used

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  • Nickel-based alloy welding strip and preparation method and application thereof
  • Nickel-based alloy welding strip and preparation method and application thereof
  • Nickel-based alloy welding strip and preparation method and application thereof

Examples

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Effect test

preparation example Construction

[0066] In the above-mentioned preparation method of the nickel-based alloy welding strip for nuclear island equipment, the alloy raw materials are proportioned according to the composition of the nickel-based alloy welding strip for nuclear island equipment, and then smelting → refining → billet forging → hot rolling → steel coil annealing. →First pickling→rough cold rolling→cleaning→rough cold rolling intermediate annealing→second pickling→finishing cold rolling→finishing cold rolling intermediate annealing→coiling→oil removal process to make nickel-based alloy welding strip for nuclear island equipment.

[0067] The specific preparation method of the nickel-based alloy welding strip for the nuclear island equipment is as follows:

[0068] (1) Smelting: First, clean the surface of all raw materials by rust removal, baking, etc., then obtain alloy raw materials according to the composition ratio of nickel-based alloy welding strips for nuclear island equipment, and add alloy ra...

Embodiment 1

[0092] (1) Smelting: According to the composition requirements of the nickel-based alloy welding strip for nuclear island equipment, all raw materials are derusted and baked, and the alloy raw materials are prepared according to the proportion and then added to the vacuum furnace. After melting, heat preservation and refining for 50min, adjust the composition to reach the requirements of Example 1 in Table 1, pour and tap the steel to obtain a steel ingot, and control the tapping temperature to be 1500 ° C;

[0093] (2) Refining: the steel ingot obtained in step (1) is used as an electroslag remelting electrode, and refining is carried out in an Ar atmosphere electroslag remelting furnace, using Al 2 O 3 -CaF 2 -CaO slag system ensures the refining effect, and controls the melting rate to 3.5Kg / min.

[0094] (3) Billet forging: The electroslag remelted ingot is heated to 1180°C, and forged into a flat billet with a width of 750mm and a thickness of 180mm, and the final forgi...

Embodiment 2

[0107] (1) Smelting: According to the composition requirements of the nickel-based alloy welding strip for nuclear island equipment, all raw materials are derusted and baked, and the alloy raw materials are prepared according to the proportion and then added to the vacuum furnace. After melting, heat preservation and refining for 30min, adjust the composition to reach the requirements of Example 1 in Table 1, pour and tap the steel to obtain a steel ingot, and control the tapping temperature to be 1490 ° C;

[0108] (2) Refining: the steel ingot obtained in step (1) is used as an electroslag remelting electrode, and refining is carried out in an Ar atmosphere electroslag remelting furnace, using Al 2 O 3 -CaF 2 -CaO slag system ensures the refining effect, and the melting rate is controlled to be 4.8Kg / min.

[0109] (3) Billet forging: The electroslag remelted steel ingot is heated to 1200°C, forged into a flat billet with a width of 700mm and a thickness of 120mm, and the f...

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Abstract

According to the nickel-based alloy welding strip and the preparation method and application thereof, by designing alloy components, adopting the design principle of multi-element microalloy strengthening and adding strengthening carbide forming elements Mo, V and Nb, the tensile property of the alloy is improved, the early strength in the welding solidification process is improved, the hot crack sensitivity of the alloy is improved, impurity elements such as P, S, Pb, Zn, As, Sb, Bi, O, N, Cu, Zr and B are strictly limited, and the welding quality is improved. According to the method, the corrosion resistance and the hot crack resistance of the nickel-based alloy welding strip are ensured, and the nickel-based alloy welding strip is manufactured by combining a matched process and controlling process parameters in each process, so that the nickel-based alloy welding strip has excellent tensile property, corrosion resistance and hot crack resistance and meets the welding performance requirement of nuclear energy equipment.

Description

technical field [0001] The invention relates to the fields of special alloy smelting and material processing, in particular to a nickel-based alloy welding strip and a preparation method thereof. The nickel-based alloy welding strip is mainly suitable for radiation-resistant, stress-corrosion-resistant and high-temperature-resistant nuclear island key components Surface surfacing. Background technique [0002] Nuclear island equipment operates under very harsh conditions such as high temperature, high pressure and irradiation for a long time, so it requires raw materials to have excellent corrosion resistance, good strength and high toughness and fatigue resistance to ensure long-term safe and reliable operation of nuclear power plants; in order to both It can ensure the strength of the nuclear island equipment and the corrosion resistance during service. Usually, a layer of nickel-based corrosion-resistant alloy is surfacing on the surface of the key parts of the equipment,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C30/00C22C1/02C22B9/18C22F1/10C22F1/16B23K35/30
CPCC22C19/053C22C30/00C22C1/023C22B9/18C22F1/10C22F1/16B23K35/304
Inventor 徐长征黄海燕赵欣叶军钮志卫黄庆华邢钊敖影
Owner 宝武特种冶金有限公司
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