Self-shielding flux-cored welding wire for welding aluminum and stainless steel and preparation method thereof

A technology of flux-cored welding wire and stainless steel, which is applied in welding equipment, welding/welding/cutting items, welding medium, etc., can solve the problems of welding cracks, poor interface fusion, large differences in physical properties, etc., and achieves a simple and refined operation process. The effect of grain, high production efficiency

Active Publication Date: 2021-08-06
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a self-shielded flux-cored wire for welding aluminum and stainless steel, which solves the problem of poor interface fusion and welding due to the large difference in physical properties of the two materials when welding aluminum and steel dissimilar materials. crack problem

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  • Self-shielding flux-cored welding wire for welding aluminum and stainless steel and preparation method thereof

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preparation example Construction

[0033] The present invention also provides a preparation method of the above-mentioned self-shielding flux-cored wire for welding aluminum and stainless steel, the specific steps are as follows:

[0034] Step 1: Weigh the drug core powder according to the required ratio by mass percentage: Zn powder: 20% to 35%, Ni powder: 10% to 20%, Ag powder: 4% to 9%, Si powder: 5% %~10%, Mg powder: 1%~2%, titanium dioxide powder: 3%~9%, calcium fluoride: 4%~6%, lithium carbonate: 2%~8%, rutile powder: 8%~16% %, balance: Al powder, the sum of the mass percentages of the above components is 100%;

[0035] Step 2: Mix the titanium dioxide, calcium fluoride, lithium carbonate, and rutile powder weighed in step 1 to form mixed powder A, add a certain amount of sodium water glass adhesive to mixed powder A and knead fully, mix evenly, Then the mixed powder A is fully sintered in a heating furnace, and after sintering, it is crushed to obtain the mixed powder B;

[0036] In step 2, the sinteri...

Embodiment 1

[0051] Step 1: Weigh Zn powder: 100g, Ni powder: 100g, Ag powder: 20g, Si powder: 50g, Mg powder: 10g, titanium dioxide: 45g, calcium fluoride: 30g, lithium carbonate: 20g, rutile powder : 70g, Al powder: 55g;

[0052] Step 2: Mix the titanium dioxide, calcium fluoride, lithium carbonate, and rutile powder weighed in step 1 to form mixed powder A, add a certain amount of sodium water glass adhesive to mixed powder A and knead fully, mix evenly, Then the mixed powder A is fully sintered in a heating furnace at a sintering temperature of 500° C., sintered for 3 hours and crushed to obtain a mixed powder B with a particle size of 100 mesh;

[0053] Wherein, the sodium silicate adhesive is 20% of the total mass of the mixed powder A;

[0054] Step 3: put the Zn powder, Ni powder, Ag powder, Mg powder, Al powder, Si powder weighed in step 1 and the mixed powder B prepared in step 2 into an automatic powder mixer for mixing, and the mixing time For 36 hours, the obtained uniform d...

Embodiment 2

[0060] Step 1: Weigh Zn powder: 125g, Ni powder: 50g, Ag powder: 45g, Si powder: 45g, Mg powder: 10g, titanium dioxide: 20g, calcium fluoride: 25g, lithium carbonate: 35g, rutile powder : 80g, Al powder: 65g;

[0061] Step 2: Mix the titanium dioxide, calcium fluoride, lithium carbonate, and rutile powder weighed in step 1 to form mixed powder A, add a certain amount of sodium water glass adhesive to mixed powder A and knead fully, mix evenly, Then the mixed powder A is fully sintered in a heating furnace, the sintering temperature is 550°C, and it is crushed after 4 hours of sintering to obtain a mixed powder B with a particle size of 100 mesh; wherein, the sodium water glass binder is 20% of the total mass of the mixed powder A. %;

[0062] Step 3: put the Zn powder, Ni powder, Ag powder, Mg powder, Al powder, Si powder weighed in step 1 and the mixed powder B prepared in step 2 into an automatic powder mixer for mixing, and the mixing time For 37 hours, the obtained unifo...

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Abstract

The invention discloses a self-protecting flux-cored welding wire for welding aluminum and stainless steel, which includes a flux core and a welding skin, wherein the mass percentage of the flux core is composed of the following components: Zn powder: 20%-35%, Ni powder: 10%-20% , Ag powder: 4% to 9%, Si powder: 5% to 10%, Mg powder: 1% to 2%, titanium dioxide: 3% to 9%, calcium fluoride: 4% to 6%, lithium carbonate: 2% to 8%, rutile powder: 8% to 16%, balance: Al powder, the sum of the mass percentages of the above components is 100%; The problems of poor interface fusion and welding cracks caused by the large difference in the physical properties of the two materials. It also provides a preparation method of welding wire. The raw materials are weighed according to the above formula, and then the raw material powders are mixed, and the pure copper strip is used as the welding skin, and the diameter of the flux-cored welding wire is reduced to 0.8mm-1.6mm through the mold in turn.

Description

technical field [0001] The invention belongs to the technical field of metal material welding, and in particular relates to a self-shielding flux-cored welding wire for welding aluminum and stainless steel, and also relates to a preparation method of the welding wire. Background technique [0002] Due to the continuous improvement of the level of science and technology, there are higher requirements for the performance of various construction machinery components. In addition to basic mechanical properties, high temperature strength, corrosion resistance, wear resistance, electrical conductivity, magnetism, low temperature Toughness and thermal conductivity, etc., in most cases, a single metal material cannot fully meet the use requirements of large structural parts. Aluminum and aluminum alloys have the characteristics of light weight, high specific strength, good thermal conductivity, electrical conductivity and corrosion resistance, and can maintain good mechanical proper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/28B23K35/30B23K35/40B23K35/368B23K103/20
CPCB23K35/0266B23K35/282B23K35/3033B23K35/3608B23K35/368B23K35/406B23K2103/20
Inventor 张敏李静张云龙史杰
Owner XIAN UNIV OF TECH
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