Self-shielded flux-cored wire for non-magnetic steel 20Mn23Al and preparing method of wire

A technology of flux-cored welding wire and non-magnetic steel, applied in welding equipment, welding media, manufacturing tools, etc., to achieve the effects of less welding spatter, convenient operation, and large-scale mass production

Inactive Publication Date: 2017-11-07
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this stage, there are few developments on non-magnetic steel 20Mn23Al welding consumables, so hereby develop a self-shielding flux-cored welding wire of non-magnetic steel 20Mn23Al

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The preparation method of the above-mentioned non-magnetic steel 20Mn23Al self-shielding flux-cored welding wire, the specific steps are as follows:

[0029] Step 1: Weigh 18%-28% of chromium powder, 2%-8% of nickel powder, 1.5%-3.5% of molybdenum powder, 2.5%-10% of manganese powder, 0.5%-1.5% of ferrosilicon powder, Magnesium aluminum powder 2%-8%, ferroniobium powder 0.5%-1.5%, titanium iron powder 0.5%-1%, barium fluoride powder 10%-17%, magnesium oxide powder 5%-15%, alumina powder 1 %-5%, cerium oxide powder 0.5%-1.5%, quartz powder 1%-3.5%, rutile powder 18%-26%, zircon sand powder 2%-8%, lithium carbonate powder 1%-3%, Calcium carbonate powder 0.5%-3%, iron oxide powder 0.5%-5%, the sum of the mass percentages of the above components is 100%;

[0030] Step 2: Mix the barium fluoride powder, magnesium oxide powder, aluminum oxide powder, quartz powder, iron oxide powder, lithium carbonate powder and calcium carbonate powder weighed in step 1, add water glass bin...

Embodiment 1

[0035] Step 1: Weigh 220g of chromium powder, 50g of nickel powder, 20g of molybdenum powder, 65g of manganese powder, 5g of ferrosilicon powder, 60g of magnesium aluminum powder, 5g of ferroniobium powder, 5g of ferrotitanium powder, 120g of barium fluoride powder, magnesium oxide 80g aluminum oxide powder, 30g alumina powder, 15g cerium oxide powder, 20g quartz powder, 200g rutile powder, 50g zircon sand powder, 20g lithium carbonate powder, 15g calcium carbonate powder, 20g iron oxide powder;

[0036] Step 2: Mix the barium fluoride powder, magnesium oxide powder, aluminum oxide powder, quartz powder, iron oxide powder, lithium carbonate powder and calcium carbonate powder weighed in step 1, add water glass binder to it and mix evenly, then Place in a heating furnace for sintering at 600°C for 3 hours, after sintering, grind and pass through a 80-120 mesh sieve to obtain mixed powder A;

[0037] Step 3: The chromium powder, nickel powder, molybdenum powder, manganese powder...

Embodiment 2

[0042] Step 1: Weigh 240g of chromium powder, 60g of nickel powder, 25g of molybdenum powder, 70g of manganese powder, 2g of ferrosilicon powder, 60g of magnesium aluminum powder, 3g of ferroniobium powder, 5g of ferrotitanium powder, 110g of barium fluoride powder, magnesium oxide Powder 60g, alumina powder 30g, cerium oxide powder 10g, quartz powder 15g, rutile powder 200g, zircon sand powder 50g, lithium carbonate powder 15g, calcium carbonate powder 15g, iron oxide powder 30g;

[0043] Step 2: Mix the barium fluoride powder, magnesium oxide powder, aluminum oxide powder, quartz powder, iron oxide powder, lithium carbonate powder and calcium carbonate powder weighed in step 1, add water glass binder to it and mix evenly, then Place it in a heating furnace for sintering at 650°C for 3.5 hours. After sintering, grind and pass through a 80-120 mesh sieve to obtain mixed powder A;

[0044] Step 3: The chromium powder, nickel powder, molybdenum powder, manganese powder, ferrosil...

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Abstract

The invention discloses a s elf-shielded flux-cored wire for non-magnetic steel 20Mn23Al. The wire comprises a flux core and a skin; the flux core is composed of 18 to 28% of chromium powder, 2 to 8% of nickel powder, 1.5 to 3.5% of molybdenum powder, 2.5 to 10% of manganese powder, 0.5 to 1.5% of ferrosilicon powder, 2 to 8% of aluminum and magnesium, 0.5 to 1.5% of ferrocolumbium, 0.5 to 1% of ferrotitanium, 10 to 17% of barium fluoride, 5 to 15% of magnesium oxide, 1 to 5% of aluminum oxide, 0.5 to 1.5% of cerium oxide, 1 to 3.5% of quartz sand, 18 to 26% of rutile, 2 to 8% of zircon sand, 1 to 3% of lithium carbonate, 0.5 to 3% of calcium carbonate and 0.5 to 5% of iron oxide powder. The wire is used for 20Mn23Al welding, protection gas does not need to be added, a welding joint with higher tensile strength and corrosion resistance can be obtained, the welding wire is simple in preparing method, and large-scale batched production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of metal material welding, and in particular relates to a self-protecting flux-cored welding wire for non-magnetic steel 20Mn23Al, and also relates to a preparation method of the flux-cored welding wire. Background technique [0002] The non-magnetic steel belongs to the Fe—Mn—Al—C series austenitic metal material. 20Mn23A1 is used as a special low magnetic steel plate for transformers. It has low permeability and high resistivity. The eddy current loss in the magnetic field is extremely small, thereby improving the performance of the transformer. Therefore, this iron-manganese-aluminum low-magnet steel has been widely used in transformer manufacturers across the country. Moreover, the mechanical properties are excellent, and the cutting, welding, drilling, bending, etc. are as easy as ordinary steel in processing and manufacturing. Compared with stainless steel, it not only reduces material costs, improves...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/368B23K35/40
CPCB23K35/308B23K35/368B23K35/406
Inventor 张敏史杰张涛王莹慕二龙程康康周玉兰
Owner XIAN UNIV OF TECH
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