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High-toughness and high-strength steel electrode for 60kg all position welding

An all-position welding, kilogram-level technology, applied in welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of poor welding process of electric electrode and unstable weld metal toughness, and achieve low manufacturing cost, Excellent comprehensive mechanical properties and stable weld metal properties

Active Publication Date: 2012-09-26
TIANJIN BRIDGE WELDING MATERIALS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to meet the needs of these industries for high-strength and high-toughness electrodes, and to solve the problems of unstable weld metal toughness and poor welding process of welding electrodes in existing products under the working environment of -60°C, the applicant has developed a product with a low strength level of 60 kg. Alloy high-strength steel matching 60 kg level all-position welding high-toughness and high-strength steel electrode

Method used

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  • High-toughness and high-strength steel electrode for 60kg all position welding
  • High-toughness and high-strength steel electrode for 60kg all position welding
  • High-toughness and high-strength steel electrode for 60kg all position welding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0016] Embodiment 1-4 prepares electrode of the present invention

[0017] The welding core is made of carbon steel core, and its chemical composition and mass fraction are as follows:

[0018] C

mn

Si

S

P

≤0.10

0.35-0.60

≤0.03

≤0.010

≤0.010

[0019] Get each component of drug skin by table 1 and mix homogeneously, add potassium sodium mixing water glass and stir, add-on is: embodiment 1, drug skin total amount 18%; Embodiment 2, drug skin total amount 20%; Embodiment 3, the total amount of the drug skin is 22%; embodiment 4, the total amount of the drug skin is 26%. Afterwards, special equipment for the production of welding rod industry is used to evenly coat it on the welding core. After grinding out the clamping end and arc starting end, it is sent to the welding rod drying furnace through low temperature 50-90 ℃, medium temperature 90-150 ℃, high temperature 350 Dry at -400°C in three stages, each st...

experiment example 1

[0023] Experimental Examples 1-4 The properties of the electrodes prepared in Examples 1-4 were tested.

[0024] The mechanical properties of the deposited metal of the low-temperature structural steel electrode prepared in Examples 1-4 were tested according to conventional methods in the industry, and the results are shown in Table 2.

[0025] Table 2

[0026]

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Abstract

The invention relates to a high-toughness and high-strength steel electrode for 60kg all position welding, and the high-toughness and high-strength steel electrode is composed of a welding core and an electrode coating, wherein the electrode coating comprises the following components in percentage by weight: 32-40% of CaCO3, 16-24% of CaF2, 5-9% of TiO2, 3-8% of SiO2, 5-11% of ferro titanium, or 3- 4.5% of ferro chromium, 5-8% of metal manganese and ferro manganese, 3-6% of ferro molybdenum, 0-9% of ferrosilicon, 2-5% of, metal nickel, 8-17% of and iron powder; the high-toughness and high-strength steel electrode can satisfy the welding of 60kg intensity steels, the low temperature impact toughness is excellent, the mechanical property and the comprehensive mechanical properties are very excellent, especially the predominance is very outstanding in an operational environment that the temperature is minus 60 DEG, simultaneously the production cost is low, the welding technology is superior, and the welding operation is easy to perform.

Description

technical field [0001] The invention belongs to the field of welding materials, and relates to a welding rod for steel structure working in a low temperature environment for a long time, in particular to a 60 kg class all-position welding high toughness and high strength steel with excellent impact toughness in a low temperature environment of -60°C Welding. Background technique [0002] With the development of my country's modern ocean engineering, the level of steel structure manufacturing of oil production platforms has been greatly improved. Low-alloy high-strength grade steel suitable for long-term work in low-temperature environments has the characteristics of excellent low-temperature impact toughness and high strength. Using this steel can reduce steel consumption, reduce structural weight, reduce welding workload, and improve structural bearing capacity And safety, because of its many advantages, it is widely used in marine engineering, bridge construction, pressur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/368B23K35/30B23K35/40
Inventor 郑子行李志提翟泳韩海舰张志涛李艳琨
Owner TIANJIN BRIDGE WELDING MATERIALS GROUP
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