Flux-cored wire for fusion welding butt joint of titanium-steel composite board and preparation method of flux-cored wire

A technology of flux-cored welding wire and composite plate, which is applied in welding equipment, welding equipment, welding/welding/cutting objects, etc., can solve the problems of difficulty in the smooth welding of materials, limited test welding materials, and inability to guarantee the composition. The effect of large-scale mass production, simple manufacturing process, and easy component control

Inactive Publication Date: 2014-09-10
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the welding of titanium-steel composite plates (pipes) mainly uses the existing Ti-Ni, Cu, V and other solid welding wires on the market as the transition layer welding materials. On the one hand, the experimental welding materials are limited, and its composition cannot be guaranteed to be consistent with the base metal Exact match, on the other hand, the properties of the material itself make it difficult for the welding process to proceed smoothly

Method used

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  • Flux-cored wire for fusion welding butt joint of titanium-steel composite board and preparation method of flux-cored wire
  • Flux-cored wire for fusion welding butt joint of titanium-steel composite board and preparation method of flux-cored wire
  • Flux-cored wire for fusion welding butt joint of titanium-steel composite board and preparation method of flux-cored wire

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Step 1, select vanadium powder, the particle size is 60-80 mesh, the chemical composition is V>99.9%, Fe99.2%, C<0.02%, Si<0.14%, S<0.008%, P<0.06%, respectively dried at 150°C for 2 hours;

[0041] Step 2, taking respectively 80% of dried vanadium powder and 20% of chromium powder by mass percentage, the sum of the mass percentages of the above components is 100%;

[0042] Step 3, put the medicine powder obtained in step 2 into a powder mixer, dry mix for 0.5h, and obtain a uniformly mixed medicine core powder;

[0043] Step 4, put the flux core powder obtained in step 3 on the feeder of the flux-cored welding wire production equipment, put the red copper strip with a size of 10×0.4 (mm) on the tape unloading machine, and carry out ultrasonic cleaning through the copper strip cleaning equipment, and then carry out Rolling U-shaped slots and adding powder, control the powder filling rate to 12%, and then pass the forming machine to join the copper strip to form a weldin...

Embodiment 2

[0049] Step 1, select vanadium powder, the particle size is 60-80 mesh, the chemical composition is V>99.9%, Fe99.2%, C<0.02%, Si<0.14%, S<0.008%, P<0.06%, respectively baked at 160°C for 1.8h;

[0050] Step 2, take by mass percentage respectively the vanadium powder 80.5% of oven dry, 19.5% of chromium powder, the mass percentage sum of above components is 100%;

[0051] Step 3, put the medicine powder obtained in step 2 into a powder mixer, dry mix for 0.6h, and obtain a uniformly mixed medicine core powder;

[0052] Step 4, put the flux core powder obtained in step 3 on the feeder of the flux-cored welding wire production equipment, put the red copper strip with a size of 10×0.4 (mm) on the tape unloading machine, and carry out ultrasonic cleaning through the copper strip cleaning equipment, and then carry out Rolling U-shaped groove and adding powder operation, control the powder filling rate to 10%, and then carry out the steel strip joint through the forming machine to f...

Embodiment 3

[0058] Step 1, select vanadium powder, the particle size is 60-80 mesh, the chemical composition is V>99.9%, Fe99.2%, C<0.02%, Si<0.14%, S<0.008%, P<0.06%, respectively baked at 180°C for 1.5h;

[0059] Step 2, take by mass percentage respectively the vanadium powder 81% of oven dry, 19% of chromium powder, the mass percentage sum of above components is 100%;

[0060] Step 3, put the medicinal powder obtained in step 2 into a powder mixer, and mix for 0.8h to obtain a homogeneously mixed medicinal core powder;

[0061] Step 4, put the flux core powder obtained in step 3 on the feeder of the flux-cored welding wire production equipment, put the red copper strip with a size of 10×0.4 (mm) on the tape unloading machine, and carry out ultrasonic cleaning through the copper strip cleaning equipment, and then carry out Rolling U-shaped slots and adding powder to control the powder filling rate to 15%, and then through the forming machine to join the copper strip to form a welding wi...

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Abstract

A flux-cored wire for fusion welding butt joint of a titanium-steel composite board comprises the components in percentage by mass as follows: 80-81% of vanadium powder and 19-20% of chromium powder, and the sum of the mass percentageof the components is 100%. The invention further discloses a preparation method of the flux-cored wire. The preparation method comprises the steps as follows: the vanadium powder and the chromium powder are dry-mixed to obtain flux core powder, the flux core powder is placed on a charging machine of flux-cored wire production equipment, a copper belt is placed on a belt unwinding machine, ultrasonic cleaning is performed, then U-shaped groove rolling and powder adding operations are performed, the powder filling rate is controlled, sealing of the copper belt is performed through a forming machine, and a wire with the diameter of 3.8 mm is formed; then the flux-cored wire is obtained through six reducing treatment processes and a nine-stage reducing finish drawing treatment process sequentially. By means of the flux-cored wire, a titanium layer and a steel layer weld structure of the composite board can be effectively joined together, and the fusion welding butt joint of the titanium-steel composite board is realized; an obtained weld joint has excellent toughness; and the preparation process is simple, and mass production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of material processing, and in particular relates to a flux-cored welding wire for fusion welding butt joint of titanium-steel composite plates, and also relates to a preparation method of the flux-cored welding wire. Background technique [0002] Titanium-steel composite plates (pipes) are widely used in petrochemical and other industrial sectors because of their high strength, excellent corrosion resistance and significant economic benefits. As titanium is an active metal, it is easy to form compounds with iron and carbon elements in steel at high temperatures, which increases the brittleness of the composite interface and easily produces welding cracks, which seriously restricts the fusion welding of titanium-steel composite materials and its application. At present, the welding of titanium-steel composite plates (pipes) mainly uses the existing Ti-Ni, Cu, V and other solid welding wires on the market as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/32B23K35/40
CPCB23K9/173B23K33/00B23K35/0266B23K35/24B23K35/406B23K2103/24
Inventor 张敏刘明志张明李继红
Owner XIAN UNIV OF TECH
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