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9% Ni steel matched nickel-based welding rod special for overhead welding

A nickel-based electrode, 9%ni technology, used in welding media, welding equipment, welding/cutting media/materials, etc., to achieve stable mechanical properties, excellent low-temperature impact toughness, and low porosity.

Active Publication Date: 2020-08-28
KUSN GINTUNE WELDING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] With the adjustment of my country's energy strategy, the LNG industry has maintained a momentum of rapid development in my country. The development of the LNG industry has greatly increased the demand for 9Ni steel and 9Ni steel welding materials. However, this material mainly relies on imports. In recent years, domestic The research and development of 9% Ni steel electrodes by various large-scale welding consumables companies has made certain breakthroughs and progress, but the problem of porosity in overhead welding of 9% Ni steel electrodes is an important bottleneck that restricts the localization of domestic 9% Ni steel electrodes.

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  • 9% Ni steel matched nickel-based welding rod special for overhead welding
  • 9% Ni steel matched nickel-based welding rod special for overhead welding
  • 9% Ni steel matched nickel-based welding rod special for overhead welding

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Embodiment Construction

[0053] The technical solutions of the present invention will be further described below in conjunction with specific examples, but the present invention is not limited to these examples.

[0054] A nickel-based welding rod for 9% Ni steel for overhead welding, consisting of a welding core and a coating, the coating is coated on the outer wall of the welding core, and the coating accounts for 0.3 to 0.5 of the total weight coefficient of the welding rod; the welding core is made of nickel chromium Iron welding core; its welding core composition (% by weight) is shown in Table 1:

[0055] Table 1: Solder Core Composition

[0056]

[0057]

[0058] Table 2: Solder core composition (weight percentage %) in embodiment 1~5

[0059]

[0060] The coating uses high alkalinity CaCO 3 -MgCO 3 -CaF 2 For the low hydrogen slag system, the proportion of the coating to the total weight of the electrode is 0.3-0.5, and the diameter of the core wire is 2.6mm and 3.2mm. The compone...

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Abstract

The invention discloses a 9% Ni steel matched nickel-based welding rod special for overhead welding. The welding rod is composed of a welding core and a coating, wherein the outer wall of the weldingcore is coated with the coating, the coating accounts for 0.3-0.5% of the total weight coefficient of the welding rod, the welding core is a nickel-chromium-iron welding core, and the coating is composed of a CaCO3-MgCO3-CaF2 low-hydrogen slag system with high alkalinity. The welding rod has excellent all-position weldability, especially overhead welding position weldability, and extremely low overhead welding shooting porosity; and the welding rod has excellent overhead welding property, stable electric arc, excellent deslagging property and excellent weld joint forming property, the weldingrod has extremely low overhead welding porosity, and the overhead welding high-definition radiographic inspection TOFD shooting qualification rate can reach 99.5% or above.

Description

technical field [0001] The invention belongs to the field of welding materials, and in particular relates to a nickel-based welding rod matched with 9% Ni steel for overhead welding. Background technique [0002] With the acceleration of global industrialization and informatization, the demand for energy in countries around the world is increasing rapidly. At the same time, problems such as energy shortage and coal burning pollution, which seriously restrict the sustainable development of the economy, are also increasingly exposed. As a high-quality clean fuel and an important chemical raw material, natural gas has become one of the three pillar energy sources in the world today. In the past 10 years, the status and role of natural gas in social development have become increasingly prominent, and global natural gas production and consumption have shown a steady growth trend. It is estimated that by 2020, 40% of the global natural gas trade volume will be liquefied natural ga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/365B23K35/40
CPCB23K35/304B23K35/365B23K35/404B23K35/3602B23K35/0272
Inventor 周峙宏王登峰程浩成双
Owner KUSN GINTUNE WELDING
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