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Stainless steel flux-cored wire and production method thereof

A technology of flux-cored welding wire and production method, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc. It can solve the problems of small pores in deposited metal, unreasonable composition configuration, poor weld formation, etc., and achieve evaporation The effect of reducing the amount, reducing the incidence of welding leaks, and improving moisture resistance

Active Publication Date: 2018-04-06
GUILIN UNIV OF AEROSPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the duplex stainless steel flux-cored welding wire still has unreasonable composition configuration, which leads to small pores, cracks, large dust generation in the welding process, and poor weld shape in the deposited metal. At the same time, it is wear-resistant, corrosion-resistant, crack-resistant and fatigue-resistant. The mechanical properties still need to be improved

Method used

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  • Stainless steel flux-cored wire and production method thereof
  • Stainless steel flux-cored wire and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The stainless steel flux-cored wire is composed of a flux core and a stainless steel strip wrapped around the flux core. The flux core accounts for 28% of the total weight of the flux-cored wire. The flux core contains the following components in mass percentage: chromium powder 16%, rutile powder 12%, nickel 6% manganese powder, 5% manganese powder, 5% feldspar powder, 3% aluminum-magnesium alloy powder, 3% molybdenum iron powder, 3% composite nitride, 1% composite fluoride, 0.6% bismuth oxide, 0.5% tellurium dioxide, 0.5% of cerium oxide, the balance is iron powder, the sum of the mass percentages of the above components is 100%;

[0029] The stainless steel strip includes the following components in mass percentage: C: 0.025%, Cr: 18.5%, Ni: 9.5%, Mn: 0.80%, Al: 0.02%, Si≤0.04%, S≤0.005%, P≤0.01%, N≤0.003%, the balance is Fe and other unavoidable impurities.

[0030] The production method of stainless steel flux cored wire is:

[0031] S1. Weigh and mix rutile powd...

Embodiment 2

[0035] The stainless steel flux-cored wire is composed of a flux core and a stainless steel strip wrapped around the flux core. The flux core accounts for 25% of the total weight of the flux-cored wire. The flux core contains the following components in mass percentage: 15% chromium powder, 15% rutile powder, nickel 10% manganese powder, 8% manganese powder, 8% feldspar powder, 4% aluminum-magnesium alloy powder, 4% ferromolybdenum powder, 4% composite nitride, 2% composite fluoride, 1% bismuth oxide, 1% tellurium dioxide, 1% cerium oxide, the balance is iron powder, the sum of the mass percentages of the above components is 100%;

[0036] The stainless steel strip includes the following components in mass percentage: C: 0.03%, Cr: 19.0%, Ni: 10.0%, Mn: 0.82%, Al: 0.03%, Si≤0.04%, S≤0.005%, P≤0.01%, N≤0.003%, the balance is Fe and other unavoidable impurities.

[0037] The production method of stainless steel flux cored wire is:

[0038] S1. Weigh and mix rutile powder, feld...

Embodiment 3

[0042] The stainless steel flux cored wire is composed of a flux core and a stainless steel strip wrapped around the flux core. The flux core accounts for 23% of the total weight of the flux cored wire. The flux core contains the following components in mass percentage: chromium powder 18%, rutile powder 14%, nickel 8% manganese powder, 6% manganese powder, 7% feldspar powder, 3.2% aluminum-magnesium alloy powder, 3.5% molybdenum iron powder, 3.5% composite nitride, 1.5% composite fluoride, 0.8% bismuth oxide, 0.8% tellurium dioxide, 0.8% of cerium oxide, the balance is iron powder, the sum of the mass percentages of the above components is 100%;

[0043] The stainless steel strip includes the following components in mass percentage: C: 0.035%, Cr: 19.5%, Ni: 10.2%, Mn: 0.84%, Al: 0.032%, Si≤0.04%, S≤0.005%, P≤0.01%, N≤0.003%, the balance is Fe and other unavoidable impurities.

[0044] The production method of stainless steel flux cored wire is:

[0045] S1. Weigh and mix r...

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Abstract

The invention relates to a stainless steel flux-cored wire and a production method thereof. The stainless steel flux-cored wire is characterized in that the stainless steel flux-cored wire is composedof a flux-core and a stainless steel belt, wherein the flux-core is wrapped with the stainless steel belt; the weight of the flux-core accounts for 18-28% of the total weight of the flux-cored wire;and the flux-core comprises, by mass, 15-20% of chromium powder, 10-15% of rutile powder, 5-10% of nickel powder, 4-8% of manganese powder, 4-8% of feldspar powder, 2-4% of aluminum-magnesium alloy powder, 2-4% of molybdenum iron powder, 2-4% of complex nitride, 0.5-2% of complex fluoride, 0.5-1% of bismuth oxide, 0.1-1% of tellurium dioxide, 0.1-1% of cerium oxide, and the balance iron powder, and the sum of the mass percents of the components is 100%. The stainless steel flux-cored wire has the advantages that weld joint forming is attractive, slag removal is easy, splashing is low, an electric arc is stable, no small air hole exists in a weld joint, the amount of fumes in the welding process is small, and meanwhile, the weld joint microstructure further has excellent abrasion resistance, corrosion resistance, crack resistance and fatigue resistance.

Description

technical field [0001] The invention relates to the technical field of welding wire, in particular to a flux-cored welding wire suitable for duplex stainless steel and a production method thereof. Background technique [0002] In recent years, with the rapid development of the economy, the stainless steel industry has also developed rapidly. The strong growth of stainless steel consumption will surely drive the rapid growth of the welding market: on the one hand, the improvement of steel quality promotes the upgrading of stainless steel welding materials; accelerate. [0003] Compared with traditional manual electrodes, copper-plated solid wires, and submerged arc fluxes, welding with stainless steel flux-cored wires has obvious advantages. First, the welding process is more continuous, and automatic welding can be realized, thereby reducing welding joints. The production efficiency is greatly improved, which is 3-4 times that of manual arc welding. The welding quality is ...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/12B23K35/40
CPCB23K35/0266B23K35/3053B23K35/406
Inventor 郑利华吴江覃学东覃科吕勇张栋梁
Owner GUILIN UNIV OF AEROSPACE TECH
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