Welding stick for all-position welding of X100 pipeline steel and manufacturing method thereof

An all-position, pipeline steel technology, applied in the direction of welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problem of backward development of high-grade pipeline steel welding materials, complete process technology and product development, and restrict high-grade pipeline Steel and other problems, to achieve the effect of good arc start and arc stability, filling rate control, and good fluidity of the molten pool

Inactive Publication Date: 2014-08-06
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In recent years, my country's iron and steel smelting and pipe-making levels have been greatly improved, X70 and other high-grade pipeline steels have been applied on a large scale, X80 pipeline steels have also begun to be put into industrial applications, and the research and development of X100 and X120 pipeline steels have a

Method used

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  • Welding stick for all-position welding of X100 pipeline steel and manufacturing method thereof
  • Welding stick for all-position welding of X100 pipeline steel and manufacturing method thereof
  • Welding stick for all-position welding of X100 pipeline steel and manufacturing method thereof

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Experimental program
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Effect test

preparation example Construction

[0048] The preparation method of the above-mentioned welding wire for all-position welding of X100 pipeline steel, the specific steps are as follows:

[0049] Step 1, weigh 40% to 60% of fluoride, 10% to 20% of oxide, 2% to 6% of carbonate, 12% to 16% of Al-Mg alloy powder and 2% to 10%, chromium powder 2% to 5%, molybdenum powder 3% to 8%, electrolytic manganese metal 5% to 10%, ferroniobium 0% to 3%, the sum of the mass percentages of each component is 100%;

[0050] Fluorides, oxides and carbonates were baked at 250°C for 1.5h before weighing; Al-Mg alloy powder, nickel powder, chromium powder, molybdenum powder, electrolytic metal manganese and ferroniobium were dried at 150 Bake at ℃ for 1.5h;

[0051] The fluoride is a mixture of barium fluoride and lithium fluoride; the oxide is a mixture of ferric oxide and aluminum oxide; the carbonate is lithium carbonate;

[0052] Step 2, dry-mix fluoride, oxide and carbonate in a powder mixer for 0.5-0.8 hours, then put them into...

Embodiment 1

[0059] Step 1, take by weighing 40% barium fluoride (BaF 2 ), 9% lithium fluoride (LiF), 10% ferric oxide (Fe 2 o 3 ), 4% aluminum oxide (Al 2 o 3 ), 4% lithium carbonate (Li 2 CO 3 ), 12% Al-Mg alloy powder, 6% nickel powder, 5% molybdenum powder, 3% chromium powder, 6% electrolytic metal manganese, 1% ferroniobium, the sum of the mass percentages of each component is 100%;

[0060] Step 2, dry-mix barium fluoride, lithium fluoride, ferric oxide, aluminum oxide and lithium carbonate in a powder mixer for 0.5 hours, then put them into a spray granulator, and use water as a binder Carry out granulation, and the particle size is controlled at 2-3mm;

[0061] Step 3, sintering the granules obtained in step 2 at 700°C for 0.8h, and then crushing them, and screening out the medicinal powder with a particle size of 60-100 mesh;

[0062] Step 4, uniformly mixing the drug powder obtained in step 3 with Al-Mg alloy powder, nickel powder, chromium powder, molybdenum powder, elec...

Embodiment 2

[0066] Step 1, take by weighing 34% barium fluoride (BaF 2 ), 6% lithium fluoride (LiF), 12% ferric oxide (Fe 2 o 3 ), 8% aluminum oxide (Al 2 o 3 ), 6% lithium carbonate (Li 2 CO 3 ), 16% Al-Mg alloy powder, 5% nickel powder, 2% molybdenum powder, 4% chromium powder, 5% electrolytic manganese, 2% ferroniobium, the mass percentage sum of each component is 100%;

[0067] Step 2, dry-mix barium fluoride, lithium fluoride, ferric oxide, aluminum oxide and lithium carbonate in a powder mixer for 0.6 hours, then put them into a spray granulator, and use water as a binder Carry out granulation, and the particle size is controlled at 2-3mm;

[0068] Step 3, sintering the granules obtained in step 2 for 0.7 hours at 720° C. and then crushing, and screening out the powder with a particle size of 60 to 100 mesh;

[0069] Step 4, uniformly mixing the drug powder obtained in step 3 with Al-Mg alloy powder, nickel powder, chromium powder, molybdenum powder, electrolytic metal mangane...

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Abstract

A welding stick for the all-position welding of X100 pipeline steel comprises a flux core and a covering. The flux core comprises, by mass, 40-60% of fluoride, 10-20% of oxide, 2-6% of carbonates, 12-16% of Al-Mg alloy powder, 2-10% of nickel powder, 2-5% of chromium powder, 3-8% of molybdenum powder, 5-10% of electrolytic manganese metal and 0-3% of ferroniobium, and the sum of the mass percents of the components is 100%. According to the welding stick for the all-position welding of the X100 pipeline steel, adding of a denitrification agent and a deoxidizing agent (namely the Al-Mg alloy powder and ferromanganese) is controlled, the slagging and gas making functions of the fluoride and the carbonates are matched, and the good slag-gas-metal triune self-protection effect is achieved. The arcing and arc stability properties are good, the fluidity of a weld pool is good, splashing particles are small, postwelding slag coverage is even, slag removal is easy, and the appearance of weld seams is delicate and attractive.

Description

technical field [0001] The invention belongs to the technical field of material processing, and in particular relates to a welding wire used for all-position welding of X100 pipeline steel, and also relates to a preparation method of the welding wire. Background technique [0002] In recent years, my country's iron and steel smelting and pipe-making levels have been greatly improved, X70 and other high-grade pipeline steels have been applied on a large scale, X80 pipeline steels have also begun to be put into industrial applications, and the research and development of X100 and X120 pipeline steels have also been successful. , but correspondingly, the development of high-grade pipeline steel welding materials and the development of complete sets of technology and product development are relatively backward. If the pace is not accelerated, it will become a bottleneck restricting the development of my country's high-grade pipeline steel industry. Therefore, it is particularly i...

Claims

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Application Information

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IPC IPC(8): B23K35/24B23K35/368B23K35/40
CPCB23K35/24B23K35/365B23K35/368B23K35/40
Inventor 张敏刘明志陈阳阳李继红
Owner XIAN UNIV OF TECH
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