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Stainless steel flux-cored wire and preparation method thereof

A flux-cored welding wire and stainless steel technology, applied in welding equipment, welding medium, manufacturing tools, etc., can solve problems such as pitting stress cracks, material welding difficulties, and easy cracking

Pending Publication Date: 2021-10-01
株洲湘江电焊条有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of stainless steel flux-cored welding wire and its preparation method, to solve the weldability of high carbon steel, high alloy steel, tool steel, spring steel, manganese alloy steel, cast steel and other steel products proposed in the above background technology Very poor, welding these steels with similar materials is easy to crack, and it must be preheated at high temperature and then slowly cooled before welding. In some working conditions, there is no preheating condition, which makes welding of such materials a problem. This problem can be solved with dissimilar steel Only welding can solve the problem. AF312 stainless steel welding consumables have good crack resistance. When welding such materials, preheating is not required, and cold welding can also solve cracking problems. It is often called universal welding consumables, but its pitting resistance Not very good, pitting corrosion may cause stress cracks after a long time

Method used

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preparation example Construction

[0016] The invention discloses a stainless steel flux-cored welding wire and a preparation method thereof. The stainless steel flux-cored welding wire comprises the following components and contents: 1-3% of zircon sand, 19-29% of rutile, 1-3% of bauxite, nitrogen Chromium powder 1%-2%, metal chromium powder 7%-9%, aluminum powder 2-5%, cobalt powder 3-5%, metal manganese powder 3-6%, iron powder 15-30%, cryolite 5 -8%, silicate 18-25% and ferromolybdenum 2-4%.

[0017] Further, the total content of zircon sand, rutile, bauxite, chromium nitride powder, metal chromium powder, aluminum powder, cobalt powder, metal manganese powder, iron powder, cryolite, silicate and ferromolybdenum The addition is 100%, and the overall addition is equal to 100% of zircon sand, rutile, bauxite, chromium nitride powder, metal chromium powder, aluminum powder, cobalt powder, metal manganese powder, iron powder, cryolite, silicate After being mixed with ferromolybdenum as a whole, the overall pit...

Embodiment 1

[0021] Step 1: The powder of each component is sieved separately, and zircon sand, rutile, bauxite, chromium nitride powder, metal chromium powder, aluminum powder, cobalt powder, metal manganese powder, iron powder, cryolite, silicon Salt and ferromolybdenum are placed inside the vibrating screen for screening, ensuring that the screened raw material components are 1% zircon sand, 22% rutile, 2% bauxite, 1.5% chromium nitride powder, 7% metal chromium powder, 3% aluminum powder, 4% cobalt powder, 4.5% manganese metal powder, 25% iron powder, 6% cryolite, 20% silicate and 2% ferromolybdenum;

[0022] Step 2: Separately bake the sieved powder according to different characteristics at high and low temperatures, and mix zircon sand, rutile, bauxite, chromium nitride powder, metal chromium powder, aluminum powder, cobalt powder, metal manganese powder, Iron powder, cryolite, silicate and ferromolybdenum are put into the dryer for drying to ensure that the whole does not contain mo...

Embodiment 2

[0027]Step 1: The powder of each component is sieved separately, and zircon sand, rutile, bauxite, chromium nitride powder, metal chromium powder, aluminum powder, cobalt powder, metal manganese powder, iron powder, cryolite, silicon Salt and molybdenum ferromolybdenum are put into the vibrating screen for screening to ensure that the screened raw material components are 2% zircon sand, 23% rutile, 2% bauxite, 1% chromium nitride powder, 8% metal chromium powder, 3% aluminum powder, 4% cobalt powder, 4% manganese metal powder, 24% iron powder, 7% cryolite, 20% silicate and 2% ferromolybdenum;

[0028] Step 2: Separately bake the sieved powder according to different characteristics at high and low temperatures, and mix zircon sand, rutile, bauxite, chromium nitride powder, metal chromium powder, aluminum powder, cobalt powder, metal manganese powder, Iron powder, cryolite, silicate and ferromolybdenum are put into the dryer for drying to ensure that the whole does not contain m...

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Abstract

The invention discloses a stainless steel flux-cored wire and a preparation method thereof. The stainless steel flux-cored wire comprises, by weight, 1-3% of zircon sand, 19-29% of rutile, 1-3% of bauxite, 1-2% of chromium nitride powder, 7-9% of metal chromium powder, 2-5% of aluminum powder, 3-5% of cobalt powder, 3-6% of metal manganese powder, 15-30% of iron powder, 5-8% of cryolite, 18-25% of silicate and 2-4% of ferromolybdenum. According to the stainless steel flux-cored wire and the preparation method thereof, raw materials are sieved through powder of all the components respectively, the sieved powder is baked separately at the high temperature and the low temperature according to different characteristics, all the dried components are mixed according to the corresponding mass percent, the mixture and a U-shaped steel strip are rolled and formed through a forming machine, and the finished stainless steel flux-cored wire is obtained. Compared with the prior art, the stainless steel flux-cored wire has the characteristics of beautiful weld joint forming, good slag detachability, small splashing, good all-position weldability and the like, the pitting corrosion resistance and the stress corrosion resistance of the stainless steel flux-cored wire is the same as those of traditional Y2209, the crack resistance of the stainless steel flux-cored wire is superior to that of AF312, and the overall practicability is improved.

Description

technical field [0001] The invention relates to the field of welding wire technology, in particular to a stainless steel flux-cored welding wire and a preparation method thereof. Background technique [0002] Among many stainless steel welding materials, the traditional Y2209 is austenitic-ferritic duplex stainless steel. Good pitting resistance and stress corrosion resistance, can be used for welding ultra-low carbon stainless steel and duplex stainless steel with the same composition. General austenitic stainless steel welding materials such as A102, A202, A302 and other ferrite volume fractions are between 4% and 12%. AF312 stainless steel welding consumables are also duplex stainless steels, and their ferrite volume fractions are about 40%. It has the best crack resistance and can be used to weld various dissimilar steels, including high carbon steel, high alloy steel, tool steel, spring steel, manganese alloy steel, cast steel, etc., but its pitting resistance and stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/368B23K35/40
CPCB23K35/3086B23K35/368B23K35/406B23K35/3608B23K35/0266
Inventor 吴郁均
Owner 株洲湘江电焊条有限公司