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Low-temperature high-toughness welding wire for X80 pipeline steel and preparation method

A pipeline steel and low-temperature technology, applied in welding equipment, manufacturing tools, welding media, etc., can solve the problems of insufficient low-temperature toughness of welds, and achieve the effects of small fluctuations in low-temperature toughness, beautiful weld formation, and low cost

Active Publication Date: 2021-04-27
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a low-temperature high-toughness welding wire for X80 pipeline steel, which solves the problem of insufficient low-temperature toughness of the weld

Method used

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  • Low-temperature high-toughness welding wire for X80 pipeline steel and preparation method
  • Low-temperature high-toughness welding wire for X80 pipeline steel and preparation method
  • Low-temperature high-toughness welding wire for X80 pipeline steel and preparation method

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preparation example Construction

[0037] The present invention also provides a preparation method of low-temperature high-toughness welding wire for X80 pipeline steel, the specific steps are as follows:

[0038] Step 1: Weigh the following raw material powders according to mass percentage: C≤0.06%, Si 0.15~0.27%, Mn1.30~1.50%, P≤0.003%, S≤0.003%, Ni 1.20~2.40%, Cr 0.02~ 0.08%, Cu 0.03~0.05%, Nb 0.02~0.05%, V 0.005~0.010%, Ti 0.06~0.10%, Mo 0.10~0.20%, Al0.01~0.02%, B≤0.005%, N≤0.005%, The balance is Fe, and the sum of the mass percentages of the above-mentioned components is 100%;

[0039] Step 2: Put the raw material powder weighed in step 1 together in a vacuum induction heating furnace for smelting and refining to obtain steel ingot materials;

[0040] In step 2, the temperature of smelting is 1500°C-1800°C, and the time is 1h-3h; the temperature of refining is 1100-1200°C, and the time is 30-60min;

[0041] Step 3: First forge the cast steel ingot into a square billet, and then roll it at a certain temp...

Embodiment 1

[0047] Step 1: Weigh the following raw material powders by mass percentage: C 0.06%, Si 0.15%, Mn 1.30%, P0.003%, S 0.003%, Ni 1.20%, Cr 0.02%, Cu 0.03%, Nb 0.02%, V 0.005%, Ti0.06%, Mo 0.10%, Al 0.01%, B 0.005%, N 0.005%, the balance is Fe, and the sum of the mass percentages of the above components is 100%;

[0048] Step 2: Put the raw material powder weighed in step 1 together in a vacuum induction heating furnace for smelting and refining to obtain steel ingot materials;

[0049] In step 2, the temperature of smelting is 1500°C, and the time is 3h; the temperature of refining is 1100°C, and the time is 30min;

[0050] Step 3: Forge the cast steel ingot into a 50mm×50mm×50mm square billet, and then roll it at 600°C the wire rod;

[0051] Step 4: Carry out mechanical peeling-pickling-drying-rough drawing-crimping-heat treatment-finishing-finishing-curling-polishing-curling and other processes in turn on the wire rod, and finally obtain a welding wire with a diameter of 1....

Embodiment 2

[0058] Step 1: Weigh the following raw material powders according to mass percentage: C 0.02%, Si 0.20%, Mn 1.40%, P0.003%, S 0.003%, Ni 2.0%, Cr 0.05%, Cu 0.03%, Nb 0.02%, V 0.010%, Ti 0.08%, Mo 0.20%, Al 0.02%, B 0.005%, N 0.002%, the balance is Fe, and the sum of the mass percentages of the above components is 100%;

[0059] Step 2: Put the raw material powder weighed in step 1 together in a vacuum induction heating furnace for smelting and refining to obtain steel ingot materials;

[0060] In step 2, the temperature of smelting is 1600°C, and the time is 2h; the temperature of refining is 1200°C, and the time is 60min;

[0061] Step 3: Forge the cast ingot into a 50mm×50mm×50mm square billet, and then roll it at 700°C the wire rod;

[0062] Step 4: Carry out mechanical peeling-pickling-drying-rough drawing-crimping-heat treatment-finishing-finishing-curling-polishing-curling and other processes in turn on the wire rod, and finally obtain a welding wire with a diameter o...

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Abstract

The invention discloses a low-temperature high-toughness welding wire for X80 pipeline steel. The welding wire comprises the following components of, in percentage by mass, less than or equal to 0.06% of C, 0.15-0.27% of Si, 1.30-1.50% of Mn, less than or equal to 0.003% of P, less than or equal to 0.003% of S, 1.20-2.40% of Ni, 0.02-0.08% of Cr, 0.03-0.05% of Cu, 0.02%-0.005% of Nb, 0.005 -0.010% of V, 0.06 -0.10% of Ti, 0.10 -0.20% of Mo, 0.01 -0.02% of Al, less than or equal to 0.005% of B, less than or equal to 0.005% of N, and the balance of Fe, and the sum of the percentage by mass of the components is 100%. The welding wire solves the problem of insufficient low-temperature toughness of a welding seam. The invention further discloses a preparation method of the low-temperature high-toughness welding wire for the X80 pipeline steel.

Description

technical field [0001] The invention belongs to the technical field of metal material welding, and in particular relates to a low-temperature high-toughness welding wire for X80 pipeline steel, and also relates to a preparation method of the welding wire. Background technique [0002] Oil and gas pipelines are one of the important tools for oil and natural gas transportation. With the development of high-pressure, long-distance, and large-diameter transportation technologies for oil and gas pipelines, the requirements for pipeline steel are gradually increasing, mainly in terms of strength and toughness. aspect. In order to save the construction cost of pipeline engineering, it is more economical and reasonable to use high-strength grade pipeline steel. [0003] X80 is a typical low-alloy high-strength steel widely used in the transportation of oil and gas pipelines. In some remote oil and natural gas production areas, the natural environment is very harsh, and some oil an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3073B23K35/40Y02P10/25
Inventor 褚巧玲夏拓张林赵鹏康李继红张敏
Owner XIAN UNIV OF TECH
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