Welding rod for wet underwater welding of low alloy steel

A technology of underwater welding and low alloy steel, applied in welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of high price, low strength, lack of suitable welding materials, etc., and achieve low cost and production process. simple effect

Inactive Publication Date: 2012-11-14
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Problems solved by technology

However, there is no suitable welding material for underwater welding of low-alloy steel of general structure with high strength level.
Foreign wet underwater welding materials mainly include Hydroweld FS underwater electrode developed and produced by British Hydroweld Company, and 7018'S underwater electrode developed and produced by the United States. The above electrodes can be used for unde

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  • Welding rod for wet underwater welding of low alloy steel

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Example Embodiment

[0022] Below in conjunction with embodiment this patent is further explained and illustrated. But the scope of protection of this patent is not limited to the specific implementation. In each embodiment, H08E steel wire is used as the welding core; ordinary water glass with a solid content of 25% is used as the binder, and the ordinary welding rod is used to press-coat the welding rod; finally, the waterproof insulating varnish is coated on the surface of the coating. The raw materials of the drug skin meet the requirements of the technical scheme. High carbon ferromanganese: Mn is 79%.

[0023] Table 1 Composition of drug skins in Examples 1-3.

[0024] Raw material name rutile marble Potassium feldspar microcrystalline cellulose Titanium dioxide High carbon ferromanganese iron powder total Example 1 42% 8% 16% 6% 10% 12% 6% 100% Example 2 40% 7% 15% 10% 7% 9% 12% 100% Example 3 48% 5% 20% 5% 6% 8% 8% 10...

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Abstract

The invention introduces a welding rod for wet underwater welding of low alloy steel, which adopts a commercially available H08E steel wire as welding core, adopts coating transition alloy elements, adopts water glass as binder, and has waterproof insulation varnish coated on the surface of the coating. The coating contains the following solid parts (by weight): 40-48% of rutile, 5-8% of marble, 15-20% of potassium feldspar, 5-10% of microcrystalline cellulose, 6-10% of titanium dioxide, 8-12% of high carbon ferromanganese and 6-12% of iron powder. When the inventive welding rod is used for low alloy steel welding, deposited metal tensile strength can reach 460MPa or above; for welding in water, arcing is easy, electric arc burning is stable, arc re-striking performance is good, deslagging is easy, and the welded seam is good in appearance; the waterproof and insulating performance of the coating are good, and the coating is unlikely to deteriorate and fall off in case of long-time soaking; and the welding rod production process is simple and the cost is low.

Description

technical field [0001] The invention relates to a technology in the field of welding materials, in particular to an electrode used for wet underwater welding of low alloy steel. Background technique [0002] Wet underwater welding is an indispensable and important process in the installation and maintenance of underwater engineering structures. They are often used in the construction of marine engineering and large underwater facilities such as salvage at sea, marine energy, and marine mining. During the "Twelfth Five-Year Plan" period, the state will continue to increase investment in marine engineering and port facilities, and the demand for wet underwater welding materials will also increase. At present, the wet welding electrodes used for underwater construction in China mainly include TS202, TS203 and TS202A developed by CSIC 725. Among them, TS202, TS203 and TS202A electrodes have lower strength levels and are mainly suitable for underwater welding of Q235 and low ca...

Claims

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Application Information

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IPC IPC(8): B23K35/365
Inventor 郭敬杰黄连涛吴伦发
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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