A basic electrode for all-position welding of ultra-low hydrogen, high toughness and high strength steel

A basic electrode, ultra-low hydrogen technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., to achieve the effect of excellent operation performance, excellent welding process and reasonable matching

Inactive Publication Date: 2011-12-21
TIANJIN BRIDGE WELDING MATERIALS GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of modern industry and the continuous improvement of steel smelting and rolling technology, steel is gradually developing towards high strength and high toughness. Low alloy high strength steel has excellent low temperature impact toughness and high strength, which can reduce structural weight , Improve the safety of structures, especially suitable for hydropower stations, pressure vessels, bridge construction, ocean engineering and other industries, but the performance of existing electrodes can no longer meet the needs of these applications

Method used

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  • A basic electrode for all-position welding of ultra-low hydrogen, high toughness and high strength steel
  • A basic electrode for all-position welding of ultra-low hydrogen, high toughness and high strength steel

Examples

Experimental program
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Effect test

Embodiment 1-4

[0014] Example 1-4 Prepare welding rod of the present invention

[0015] The welding core is made of carbon steel core, and its chemical composition and mass fraction are as follows:

[0016] C mn Si S P ≤0.10 0.35-0.60 ≤0.03 ≤0.015 ≤0.015

[0017] Take each component of the coating according to Table 1, mix well, and then add potassium and sodium mixed with water glass as a binder. The add-on of binding agent is: embodiment 1, drug skin total amount 18%; Embodiment 2, drug skin total amount 20%; Embodiment 3, drug skin total amount 22%; Embodiment 4, drug skin total amount 26% %. After adding the binder, stir evenly, and then use special equipment for the production of welding rods, and evenly coat the welding core on the welding core according to the specified outer diameter of the welding rod. Dry in three stages: 50-90°C, medium temperature 90-150°C, high temperature 350-400°C, and bake for 2 hours in each stage.

[0018] Table I...

experiment example 1

[0020] Experimental example 1–4 The performance test of the electrode prepared in Examples 1-4.

[0021] The mechanical properties of the deposited metal of the low magnetic permeability stainless steel electrode prepared in Examples 1-4 were tested according to the conventional method in the industry, and the results are shown in Table 2.

[0022] Table II

[0023]

[0024] The results show that the welding wire of the invention has excellent low-temperature impact toughness, excellent handling performance, beautiful shape and excellent crack resistance.

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Abstract

The invention discloses a basic electrode for all-position welding of ultra-low hydrogen, high toughness and high strength steel. The coating mass of the electrode of the invention is composed of: CaCO330-50%, CaF220-30%, TiO27-10%, SiO26-10%, Ferrochromium alloy 3-6%, ferromanganese alloy 4-9%, ferromolybdenum 4-8%, metal nickel 1-4%; the electrode of the invention can meet the welding of high-strength grade steel, has excellent low-temperature impact toughness, and excellent operating performance , The arc is stable, the spatter is small, the shape is beautiful, the mechanical properties of the weld metal are reasonably matched, and it has excellent crack resistance.

Description

technical field [0001] The invention belongs to the technical field of welding materials, in particular to an ultra-low hydrogen, high toughness and high strength steel basic welding rod capable of all-position welding. Background technique [0002] With the continuous development of modern industry and the continuous improvement of steel smelting and rolling technology, steel is gradually developing towards high strength and high toughness. Low alloy high strength steel has excellent low temperature impact toughness and high strength, which can reduce structural weight , Improving the safety of structures, especially suitable for industries such as hydropower stations, pressure vessels, bridge construction, ocean engineering, etc., but the performance of existing electrodes can no longer meet the needs of these applications. Contents of the invention [0003] In order to meet the needs of these industries for high-strength and high-toughness electrodes, the applicant has ...

Claims

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Application Information

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IPC IPC(8): B23K35/36
Inventor 郑子行李志提翟泳于国宏吕基农
Owner TIANJIN BRIDGE WELDING MATERIALS GROUP
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