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

A pipeline steel and welding wire technology, applied in welding equipment, manufacturing tools, welding media, etc., can solve the problems of insufficient low-temperature toughness of welds, etc., and achieve the effects of small fluctuations in low-temperature toughness, convenience for large-scale batch production, and simple development processes

Active Publication Date: 2022-07-12
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 and high toughness welding wire for X80 pipeline steel and preparation method thereof
  • Low temperature and high toughness welding wire for X80 pipeline steel and preparation method thereof
  • Low temperature and high toughness welding wire for X80 pipeline steel and preparation method thereof

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preparation example Construction

[0037] The present invention also provides a method for preparing a low-temperature and high-toughness welding wire for X80 pipeline steel. The specific steps are as follows:

[0038] Step 1: Weigh the following raw material powders by 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 remainder is Fe, and the sum of the mass percentages of the above components is 100%;

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

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

[0041] Step 3: The cast ingot is first forged into a billet, and then rolled at a certain temperature to form a billet. the wire ro...

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%, Ti 0.06%, 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: place the raw powders weighed in step 1 together in a vacuum induction heating furnace for smelting and refining to obtain ingot materials;

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

[0050] Step 3: The cast ingot is first forged into a square billet of 50mm×50mm×50mm, and then rolled at 600°C. the wire rod;

[0051] Step 4: The wire rod is sequentially subjected to mechanical peeling-pickling-drying-coarse drawing-crimping-heat treatment-fine drawing-crimping-polishing-crimping and other processes, and finally the diameter of the welding wire is 1.2mm;

[0052...

Embodiment 2

[0058] Step 1: Weigh the following raw material powders by 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: place the raw powders weighed in step 1 together in a vacuum induction heating furnace for smelting and refining to obtain ingot materials;

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

[0061] Step 3: The cast ingot is first forged into a 50mm×50mm×50mm billet, and then rolled at 700°C. the wire rod;

[0062] Step 4: The wire rod is sequentially subjected to mechanical peeling-pickling-drying-coarse drawing-crimping-heat treatment-fine drawing-crimping-polishing-crimping and other processes, and finally the diameter of the welding wire is 1.2mm;

[0063] Step 5: A...

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Abstract

The low-temperature and high-toughness welding wire for X80 pipeline steel disclosed by the invention is composed of the following components by mass percentage: C≤0.06%, Si 0.15-0.27%, Mn 1.30-1.50%, 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%, Al 0.01~0.02%, B ≤0.005%, N≤0.005%, the balance is Fe, and the sum of the mass percentages of the above components is 100%. The welding wire solves the problem of insufficient low temperature toughness of the weld. The invention also discloses a preparation method of a low-temperature and high-toughness welding wire for X80 pipeline steel.

Description

technical field [0001] The invention belongs to the technical field of metal material welding, in particular to a low-temperature and 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 technology for oil and natural gas pipelines, the requirements for pipeline steel have gradually increased, 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, which is 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 som...

Claims

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Application Information

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Patent Type & Authority Patents(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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