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

A low-alloy, high-strength, iron-powder electrode technology, applied in welding medium, welding equipment, metal processing equipment, etc., can solve the problems of seawater corrosion resistance mismatch, welding defects, boron element segregation and other problems of welded joints, and achieve good resistance Seawater corrosion performance, stable arc, good low temperature toughness

Inactive Publication Date: 2007-03-28
LUOYANG SHUANGRUI SPECIAL ALLOY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 listed in China, Japan, One for each of Sweden, and one for each of the listed alkaline low-hydrogen iron powder electrodes in China (E5028), Japan (LBI-52H) and Sweden (OKFemax33.48), but the deposited metal of these electrodes only contains The main alloy elements such as C, Mn, Si, etc. do not contain Ni, Cr, and the seawater corrosion resistance of welded joints after welding of marine ships and other marine structures is obviously not matched.

Method used

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Embodiment Construction

[0016] Within the composition range of the welding rod of the present invention, three embodiment welding rods are prepared, and the specific coating composition is shown in Table 1. The production method of the iron powder welding rod is the same as the production technology of the existing ordinary welding rod. Soda water glass is used as a binder, and is applied on the H08A or H08E welding core by dry mixing, wet mixing, balling, press coating, and baking at low and high temperature, and then welding 16mm 11NiCrMoV steel plate; during the welding process of the test plate, the present invention The advanced welding rod has excellent welding process performance, stable arc, easy slag removal, small spatter, smooth welding bead, clear and easy-to-control molten pool, beautiful welding 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 performance of the deposited metal is shown in...

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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 iron powder electrode for low-alloy high-strength steel. Background technique: [0002] Iron powder welding rod is a special welding rod developed to improve welding efficiency, shorten welding time and reduce welding costs. Wide range of applications. [0003] Domestic Patent Publication No. CN1056454A "High Efficiency Alkaline Low Hydrogen Type Iron Powder Welding Rod" is suitable for the welding field of alloy structural steel. It is to add substances containing boron and titanium into the coating to inhibit the precipitation of proeutectoid ferrite, thereby obtaining The fine acicular ferrite achieves the purpose of improving the toughness of the weld. Its shortcomings: due to the existence of boron in the weld, the boron element is easy to segregate at the grain boundary or subgrain boundary when the weld is crystallized, causing welding...

Claims

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Application Information

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