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Alkaline CO2 gas protection dilute alloy heat resistant steel flux-cored wire

A technology of flux-cored welding wire and gas shielding, applied in welding medium, welding equipment, metal processing equipment and other directions, can solve the problems of inability to realize automatic production, low toughness of weld metal, poor welding processability, etc., and achieve excellent welding process performance, Good rust resistance and beautiful weld formation

Inactive Publication Date: 2015-07-01
CHINA JINGYE ENG TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the welding of heat-resistant steel, the welding wires widely used at home and abroad are acid heat-resistant steel flux-cored wires. Due to the low toughness of the weld metal, its application range is greatly limited.
The basic welding materials are mainly welding rods, so that automatic production cannot be realized, which seriously restricts the improvement of production efficiency.
In addition, the products welded by basic welding consumables have good mechanical properties of the weld metal, but the welding process is poor, which needs to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0032] Example 1-4 Basic CO 2 Preparation of flux-cored welding wire for low-alloy heat-resistant steel under gas shielding

[0033] The flux-cored welding wires of Examples 1-4 were respectively prepared according to the formulations in Table 2 by adopting the common manufacturing process in the welding wire production industry.

[0034] Table 2 Main components of flux core of alkaline slag-based welding wire

[0035] Drug core component percentage Example 1 Example 2 Example 3 Example 4 TiO 2 25 30 35 40 MgO 3.4 2.2 1.5 1.5 CaCO 3 0.6 0.8 0.5 0.5 NaF 2.8 2.3 1.8 1.6 Na 2 SiF 6 2.8 2.3 1.8 2 Silicon manganese alloy 20 15 9 4.5 Sodium cryolite 3 4 2.5 2.5 Feldspar 5 6 5.5 4.5 micro carbon ferrochrome 13 12.5 12.5 12 Ferromolybdenum 4 3.5 4 3.5 Low carbon ferromanganese 3 2 7.5 8.5 Teflon 0.4 0.4 0.4 0.4 Magnesium powder 3 3 2.5 2.5 ir...

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Abstract

The invention provides an alkaline CO2 gas protection dilute alloy heat resistant steel flux-cored wire which is composed of a flux core and a steel skin, wherein the flux core occupies 14-16% of the total weight of the wire. Weight percentages occupied by all components of the flux core are that TiO2 occupies 25-40%, MgO occupies 1-4%, CaCO3 occupies 0.4-0.8%, NaF occupies 1-3%, Na2SiF6 occupies 1-3%, silicomanganese occupies 4.5-20%, cryolite occupies 2-4%, feldspar occupies 4-10%, Teflon occupies 0.2-0.6%, iron alloy occupies 20-35%, and pure metal powder occupies 12-20%. The alkaline CO2 gas protection dilute alloy heat resistant steel flux-cored wire has excellent welding process performance due to the fact that pure CO2 serves as protection gases, and is applicable to all-position welding. In addition, the alkaline CO2 gas protection dilute alloy heat resistant steel flux-cored wire is good in weld joint molten slag coverage, easy to deslug, high in deposition efficiency, good in rust resistance and attractive in formed weld joints.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a low-alloy heat-resistant steel basic flux-cored welding wire. Background technique [0002] With the rapid development of modern industry, low-alloy heat-resistant steel is more and more widely used in high-speed development or cutting-edge industries such as electric power, chemical industry, petroleum, atomic energy, aviation, etc. Many components on equipment in these industries are at temperatures above 300 °C Work under high temperature, and some components work at a temperature as high as 1200 °C. For the welding of heat-resistant steel, the welding wires widely used at home and abroad are acid heat-resistant steel flux-cored wires. Due to the low toughness of the weld metal, its application range is greatly limited. The basic welding materials are mainly welding rods, so that automatic production cannot be realized, which seriously restricts the im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/368
Inventor 谢晋平赵海静张莉张赫白波曾宪芳马奎王凤
Owner CHINA JINGYE ENG TECH CO LTD
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