Ultralow-hydrogen type high efficiency iron powder welding rod for low alloy high streagth steel

A low-alloy high-strength, iron powder welding rod technology, used in welding media, welding equipment, metal processing equipment, etc., can solve the problems of boron segregation, seawater corrosion resistance mismatch of welded joints, welding defects, etc., and achieve low temperature toughness. Good, good seawater corrosion resistance, arc stable effect

Inactive Publication Date: 2005-08-24
LUOYANG SHUANGRUI SPECIAL ALLOY MATERIALS
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Problems solved by technology

Its disadvantages: due to the presence of boron in the weld, boron is easy to segregate at the grain boundary or subgrain boundary when the weld crystallizes, causing welding defects
[0005] The document "Comprehensive Discussion on the Performance of Efficient Electrodes E5024 and E5028" ("Welding Technology", No. 2, 1994) introduced several domestic and foreign high-efficiency iron powder electrodes, among which the acid iron powder electrodes lis

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Embodiment Construction

[0016] Within the composition range of the electrode of the present invention, three embodiment electrodes have been prepared, and its concrete coating composition is shown in Table 1. The production method of this iron powder electrode is identical with the existing common electrode production technology, and the coating powder that will prepare is used Sodium silicate is used as a binder, through dry mixing, wet mixing, beating, and pressure coating on the H08A or H08E welding core, after low and high temperature baking, and then welding 11NiCrMoV steel plates of 16mm; in the test plate welding process, the present invention The welding rod has excellent welding process performance, stable arc, easy slag removal, small spatter, smooth weld bead, clear and easy-to-control molten pool, beautiful weld bead shape, and high welding efficiency. The chemical composition of the deposited metal of the electrode of the embodiment is listed in Table 2, the properties of the deposited me...

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Abstract

An ultralow-hydrogen iron powder coated welding electrode for the high-strength low-alloy steel is composed of welding wire H08A or H08E and the coated layer prepared portionally from Fe powder, CaCO3, CaF2, Ti-Fe, feldspar, Mn powder, Ni powder, Cr-Fe, NaCO3 and sodium-water glass as adhesive.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and relates to an ultra-low hydrogen type high-efficiency iron powder welding rod for low-alloy high-strength steel. Background technique [0002] High-efficiency iron powder electrode is a special electrode developed to improve welding efficiency, shorten welding time and reduce welding costs. Due to its good welding process and high welding efficiency, it is increasingly used in large-scale welding structures and shipbuilding industries. The wider the application. [0003] Domestic Patent Publication No. CN1056454A "Efficient Alkaline Low Hydrogen Type Iron Powder Electrode" is suitable for the welding field of alloy structural steel. It uses materials containing boron and titanium in the coating to inhibit the precipitation of pro-eutectoid ferrite, thereby obtaining The fine acicular ferrite achieves the purpose of improving the toughness of the weld. Its disadvantages: due to the...

Claims

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Application Information

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IPC IPC(8): B23K35/22B23K35/362B23K35/365B23K35/368
Inventor 姚润钢孔红雨刘刚周浩
Owner LUOYANG SHUANGRUI SPECIAL ALLOY MATERIALS
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