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Vertical electro-gas welding metal-cored flux-cored welding wire for petroleum storage tank

A technology of vertical gas-electric vertical welding and flux-cored wire, applied in metal processing equipment, welding medium, welding equipment, etc., can solve problems such as unsatisfactory results and large gaps, and achieve excellent welding process performance, high production efficiency, Beautiful weld seam formation

Inactive Publication Date: 2012-09-26
CHINA JINGYE ENG TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been domestic authoritative units that have studied for a long time, but the results cannot meet the requirements, and there is a big gap with foreign products, so they finally gave up

Method used

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  • Vertical electro-gas welding metal-cored flux-cored welding wire for petroleum storage tank
  • Vertical electro-gas welding metal-cored flux-cored welding wire for petroleum storage tank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Choose a H08A carbon steel strip of 12×0.9mm (indicating that the strip has a width of 12mm and a thickness of 0.9mm, the same way of expression is used below), and first roll it into a U shape. Take 6% electrolytic manganese, 3% ferrosilicon, 1% molybdenum powder, 5% ferro-titanium, 5% nickel powder, sodium fluoride 2.5%, lithium fluoride 0.5%, sodium fluorosilicate 2%, 0.1% iron boron, 2% magnesium powder, 72.9% iron powder, the particle size of each powder can pass 80 mesh sieve. Put the various powders taken in the powder mixer and mix for 45 minutes, and then add the mixed powder to the U-shaped H08A carbon steel belt groove with a filling rate of 24%. The U-shaped groove is closed to make it wrap the powder. Then use a drawing die to draw and reduce the diameter to 1.56mm. Welding without shielding gas, welding current 350-400A, welding voltage 38-46V, welding speed 1.18mm / sec, after welding, measure the weld impact energy, the impact energy values ​​are shown in ...

Embodiment 2

[0033] The H08A carbon steel strip of 13×0.9mm is selected and rolled into a U shape first. Take 7% electrolytic manganese, 3% ferrosilicon, 1.5% molybdenum powder, 4% ferro-titanium, 3.5% nickel powder, sodium fluoride 2.5%, lithium fluoride 0.5%, sodium fluorosilicate 2%, 0.1% ferroboron , 2% magnesium powder, 73.9% iron powder, the particle size of each powder can pass 80 mesh sieve. Put the various powders taken in the powder mixer and mix for 45 minutes, and then add the mixed powder into the U-shaped H08A carbon steel belt groove with a filling rate of 25%. The U-shaped groove is closed to make it wrap the powder. Then use a drawing die to draw and reduce the diameter to 1.56mm. Welding is performed without shielding gas, welding current is 350-400A, welding voltage is 38-46V, welding speed is 1.20mm / sec, and the impact energy of the weld is measured after welding. The value of the impact energy is shown in Table 1.

Embodiment 3

[0035] H08A carbon steel strip of 13×0.8mm is selected and rolled into U shape first. Take 6% electrolytic manganese, 4% ferrosilicon, 1% molybdenum powder, 6% ferro-titanium, 5% nickel powder, sodium fluoride 2.5%, lithium fluoride 0.5%, sodium fluorosilicate 2%, 0.1% ferroboron , 2% magnesium powder, 70.9% iron powder, the particle size of each powder can pass 80 mesh sieve. Put the various powders taken in the powder mixer and mix for 45 minutes, and then add the mixed powder into the U-shaped H08A carbon steel belt groove with a filling rate of 25%. The U-shaped groove is closed to make it wrap the powder. Then use a drawing die to draw and reduce the diameter to 1.56mm. Welding without shielding gas, welding current 350-400A, welding voltage 38-46V, welding speed 1.17mm / sec, measure the weld impact energy after welding, the impact energy values ​​are shown in Table 1.

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Abstract

The invention provides a vertical electro-gas welding metal-cored flux-cored welding wire for a petroleum storage tank, wherein the vertical electro-gas welding metal-cored flux-cored welding wire for the petroleum storage tank consists of flux powder and an external stainless steel tape, and is characterized in that a flux core occupies 24-28% of the total weight of the welding wire, wherein the flux core comprises the following component in percentage by weight (based on the weight of the flux core): 5-10% of electrolytic manganese, 1-6.75% of silicon iron, 0.5-3% of molybdenum powder, 2-8% of ferrotitanium, 2-8% of nickel powder, 2-5% of sodium fluoride, 0.5-2% of lithium fluoride, 1-5% of sodium fluosilicate, 0.1-0.5% of ferroboron, 1-5% of magnesium powder, and 65-80% of ferrous powder. The flux-cored welding wire provided by the invention can be used for welding 610MPa high-intensity large wire energy steel, the welding quality is good, the welding line is molded once, and the efficiency is high.

Description

Technical field [0001] The invention belongs to the field of welding in material processing engineering, and more specifically, relates to a flux-cored welding wire made of a carbon steel strip wrapped with a variety of alloy powders and a small amount of mineral powder. The deposited metals are 12MnNiVR and B610E and corresponding foreign steels , It is mainly used for the side plates of storage tanks, but also used for vertical welding of ship shells and various internal components, box beam webs of bridges, metallurgical blast furnaces and other medium and thick plates. Background technique [0002] In order to ensure my country's energy security, the country began to establish a national petroleum strategic reserve in the first half of 2003, and plans to achieve the 90-day long-term goal of petroleum reserves by 2015. The prerequisite for achieving this goal is to build 100,000 to 150,000 m for oil storage 3 (Or larger) large crude oil storage tanks. The medium in petroleum ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30
Inventor 谢晋平张莉张赫张孝东符定梅曾宪芳赵海静李杨
Owner CHINA JINGYE ENG TECH CO LTD