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Nickel-chromium-molybdenum alloy welding wire for surfacing welding of ball valves

A nickel-chromium-molybdenum alloy, welding wire technology, applied in metal processing equipment, welding equipment, welding medium and other directions, can solve the problem of poor weldability, achieve fine grain, reduce the generation of bubbles, improve high temperature strength Effect

Active Publication Date: 2020-04-10
JIANGSU XINHUA ALLOY ELECTRIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The weldability of the current nickel-based alloys is not very good, and it cannot solve the above-mentioned hot crack problem well

Method used

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Embodiment Construction

[0023] In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed descriptions are provided in conjunction with the embodiments.

[0024] The invention provides a nickel-chromium-molybdenum alloy welding wire for surfacing welding of ball valves, which comprises the following chemical components in mass percentage: C is 0.01%, Si≤0.3%, Mn≤0.5%, P≤0.015%, S≤0.01%, Al≤0.2%, Ti≤0.3%, Cr 21.5-22.2%, Fe≤0.3%, Mo 8.5-9%, Nb+Ta 3.5-3.8%, and the balance is Ni.

[0025] In one embodiment, the nickel-chromium-molybdenum alloy welding wire for surfacing welding of ball valves of the present invention includes the following chemical components in mass percentage: C is 0.01%, Si≤0.3%, Mn≤0.5%, P≤0.015%, S≤0.01 %, Al is 0.1%, Ti is 0.2%, Cr is 22.0%, Fe is 0.2%, Mo is 8.8%, Nb+Ta is 3.8%, and the balance is Ni.

[0026] The performance of each chemical element in ERNiCrMo-3 welding wire of the present invent...

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PUM

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Abstract

The invention provides a nickel-chromium-molybdenum alloy welding wire for surfacing welding of ball valves. The nickel-chromium-molybdenum alloy welding wire includes the following chemical components including, by mass percentage, 0.01% of C, not larger than 0.3% of Si, not larger than 0.5% of Mn, not larger than 0.015% of P, not larger than 0.01% of S, not larger than 0.2% of Al, not larger than 0.3% of Ti, 21.5%-22.2% of Cr, not larger than 0.3% of Fe, 8.5%-9% of Mo, 3.5%-3.8% of the sum of Nb and Ta and the balance Ni. According to the nickel-chromium-molybdenum alloy welding wire, the type and content of elements in the alloy composition are strictly controlled, an alloy is conveniently processed into thinner welding wires, and element ratio control helps to reduce the occurrence ofhot cracks during welding; and a vacuum smelting and electroslag double smelting process is adopted, and a refining method combining high-temperature instantaneous refining and low-temperature long-term refining is adopted in the vacuum smelting process, the purity and the degassing effect are further improved, the quality and performance of alloy ingots are improved, and plasticity and impact toughness are improved.

Description

technical field [0001] The invention relates to an alloy welding wire, in particular to a nickel-chromium-molybdenum alloy welding wire for surfacing welding of a ball valve and a process preparation method thereof. Background technique [0002] Inconel625 alloy (UNS6625) is an austenitic superheat-resistant alloy with nickel as the main component. It has excellent properties of extensive oxidation resistance and corrosion resistance. welding. Even under the condition of being welded, the alloy still has the ability to resist intergranular corrosion and can be used for surfacing welding of ball valves. [0003] Nickel-based alloy INCOWEL625 has high thermal crack sensitivity during welding. Hot cracks occur at high temperatures and do not expand at room temperature. The main reason is that sulfur, lead, phosphorus or low melting point metals are mixed in to form intergranular films that cause severe embrittlement at high temperatures, especially sulfur and phosphorus eutec...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/304B23K35/40B23K35/0261
Inventor 华大凤王树平邵兴明刘威孙晓辉陈杰华鹏
Owner JIANGSU XINHUA ALLOY ELECTRIC
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