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Gas shielded metal type flux-cored welding wire for X100 pipeline steel and preparation method thereof

A technology of flux-cored welding wire and gas shielding, applied in metal processing equipment, welding equipment, manufacturing tools, etc., can solve problems such as failure, poor impact toughness, and few varieties, and achieve high production efficiency, stable arc, and improved production efficiency. Effect

Active Publication Date: 2022-07-01
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the performance characteristics of X100 pipeline steel itself, there are very high requirements for the welding process performance of metal-type flux-cored welding wire and the matching of weld metal strength and toughness. At present, there are few types of metal-type flux-cored welding wire for X100 pipeline steel in China. Moreover, the impact toughness is poor, which often leads to its failure in engineering applications.

Method used

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  • Gas shielded metal type flux-cored welding wire for X100 pipeline steel and preparation method thereof
  • Gas shielded metal type flux-cored welding wire for X100 pipeline steel and preparation method thereof

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preparation example Construction

[0031] The invention also provides a preparation method of X100 pipeline steel gas-shielded metal-type flux-cored welding wire, the specific steps are as follows:

[0032] Step 1: Weigh out by mass percentage: C≤0.08%, Si: 0.10-0.30%, Mn: 0.5-1.5%, P≤0.003%, S≤0.003%, Ni: 3.5-5.0%, Cr: 0.05- 0.10%, Cu≤0.02%, Nb≤0.02%, V: 0.005-0.01%, Ti: 0.01-0.08%, Al: 0.05-0.08%, B: 0.010-0.020%, the rest is Fe, the mass percentage of the above components The sum is 100%;

[0033] Step 2: Mix the raw material core powders weighed in Step 1 evenly and place them in a tube furnace, and keep the temperature at 200°C-220°C for 2h-3h under the condition that argon is continuously supplied;

[0034] Step 3: Place the low carbon steel strip (the composition is shown in Table 1) on the tape unwinding machine of the wire forming machine, roll the low carbon steel strip into a U-shaped groove through the pressing groove of the forming machine, and put the step 2 The obtained mixed drug core powder i...

Embodiment 1

[0038]Step 1: Weigh by mass percentage: Si: 0.15%, Mn: 0.5%, Ni: 4.62%, Cr: 0.087%, Cu: 0.018%, Nb: 0.02%, V: 0.005%, Ti: 0.045%, Al: 0.058%, B: 0.013%, the contents of S and P are P≤0.003%, S≤0.003%, the rest is Fe, and the sum of the mass percentages of the above components is 100%.

[0039] Step 2: Mix the respective raw material core powders weighed in Step 1 uniformly and place them in a tube furnace, and keep the temperature at 200° C. for 2 hours under the condition that argon gas is continuously supplied.

[0040] Step 3: Place a low carbon steel strip with a width of 7 mm and a thickness of 0.3 mm (the composition is shown in Table 1) on the strip machine of the wire forming machine, and roll the low carbon steel strip through the pressure groove of the forming machine A U-shaped groove is formed, and the drug core powder obtained in step 2 is put into the U-shaped groove. The filling rate of the drug core powder is controlled at 15-20wt%, and then the U-shaped groove...

Embodiment 2

[0043] Step 1: Weigh by mass percentage: Si: 0.25%, Mn: 0.75%, Ni: 4.25%, Cr: 0.075%, Cu: 0.018%, Nb: 0.02%, V: 0.01%, Ti: 0.062%, Al: 0.065%, B: 0.01%, the contents of S and P are P≤0.003%, S≤0.003%, the rest is Fe, and the sum of the mass percentages of the above components is 100%.

[0044] Step 2: Mix each raw material core powder weighed in Step 1 uniformly and place it in a tube furnace, and keep the temperature at 220° C. for 3 hours under the condition that argon gas is continuously supplied.

[0045] Step 3: Place the low carbon steel strip with a width of 7 mm and a thickness of 0.3 mm (the composition is shown in Table 1) on the strip machine of the wire forming machine, and roll the low carbon steel strip through the pressing groove of the forming machine A U-shaped groove is formed, and the drug core powder obtained in step 2 is put into the U-shaped groove. The filling rate of the drug core powder is controlled at 15-20wt%, and then the U-shaped groove is rolled ...

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Abstract

The gas-shielded metal-type flux-cored welding wire for X100 pipeline steel disclosed in the present invention comprises a flux core and a welding skin, wherein the flux core is composed of the following components by mass percentage: C≤0.08%, Si: 0.10-0.30%, Mn: 0.5 ‑1.5%, P≤0.003%, S≤0.003%, Ni: 3.5‑5.0%, Cr: 0.05‑0.10%, Cu≤0.02%, Nb≤0.02%, V: 0.005‑0.01%, Ti: 0.01‑0.08 %, Al: 0.05-0.08%, B: 0.010-0.020%, and the rest are Fe, and the sum of the mass percentages of the above components is 100%. It can be used for welding X100 pipeline steel. The metal type flux-cored welding wire is welded under gas protection, with good arc stability, less spatter, and the joint performance meets the standard requirements. Also provided is a preparation method of the welding wire.

Description

technical field [0001] The invention belongs to the technical field of metal material welding, in particular to an X100 pipeline steel gas-shielded metal type flux-cored welding wire, and also relates to a preparation method of the X100 pipeline steel gas-shielded metal type flux-cored welding wire. Background technique [0002] With the increasing demand for oil and natural gas, the use of high-pressure, large-diameter and long-distance pipeline transportation is the main development trend of current oil and gas transportation. As we all know, with the increase of the strength of steel, under the same gas transmission volume, the reduction of the wall thickness can save the amount of steel used, which will reduce the cost of manufacturing, transportation and on-site construction, and has good economic benefits. High-strength and high-toughness requirements are put forward for pipeline steel. [0003] In recent years, the level of steel smelting and pipe making in China has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/368B23K35/40
CPCB23K35/3066B23K35/368B23K35/406B23K35/0266
Inventor 褚巧玲张林夏拓赵鹏康李继红张敏
Owner XIAN UNIV OF TECH
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