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Metal flux-cored wire for 25Cr2Ni4MoV steel and preparing method

A technology of flux-cored welding wire and metal type, applied in metal processing equipment, welding equipment, welding medium and other directions, can solve the problems such as no reports of fusion welding gas shielded flux-cored welding wire, achieve excellent mechanical properties and corrosion resistance, The welding seam is beautiful and easy to operate.

Active Publication Date: 2018-02-02
西安华瑞力宏焊材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are only a few reports on the welding process of 25Cr2Ni4MoV alloy steel welding, and there is no report on its fusion gas shielded flux cored wire.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] The preparation method of metal-type flux-cored welding wire for 25Cr2Ni4MoV steel, the specific steps are as follows:

[0037] Step 1: Weigh 1%-4.0% of ferrosilicon powder, 6.0%-15.0% of ferromanganese powder, 20.0%-30.0% of nickel powder, 8%-15% of chromium powder and 5%-15% of ferromolybdenum powder according to mass percentage. %, vanadium iron powder 1% to 5%, copper powder 1% to 5%, rare earth powder 1% to 2%, the rest is iron, and the sum of the mass percentages of the above components is 100%;

[0038] Step 2: Mix all the raw materials weighed in step 1 evenly, place them in a drying furnace for drying, the drying temperature is 200°C-300°C, and the drying time is 2-3h, to obtain the drug core powder;

[0039] Step 3: Wrap the flux core powder obtained in step 2 in a low-carbon steel strip through a flux-cored wire making machine, and use a molding machine to close the low-carbon steel strip, and then perform the first drawing process, the first The aperture of...

Embodiment 1

[0044] Step 1: Weigh 3.0% ferrosilicon powder, 8.0% ferromanganese powder, 30.0% nickel powder, 8.0% chromium powder, 5.0% ferromolybdenum powder, 1.0% ferrovanadium powder, 2.0% copper powder, and rare earth powder according to mass percentage 1.0%, iron powder 42.0%, the sum of the mass percentages of the above components is 100%;

[0045]Step 2: Mix all the raw materials weighed in step 1 evenly, place them in a drying furnace for drying, the drying temperature is 220°C, and the drying time is 2.5 hours to obtain the drug core powder;

[0046] Step 3: Place the low-carbon steel strip with a width of 7 mm and a thickness of 0.4 mm on the tape unwinding machine of the welding wire forming machine, roll the stainless steel strip into a U-shaped groove through the pressure groove of the forming machine, and put the medicine obtained in step 3 into a U-shaped groove. The core powder is put into the U-shaped groove, the filling rate of the drug core powder is controlled at 20wt%,...

Embodiment 2

[0051] Step 1: Weigh 4.0% ferrosilicon powder, 6.0% ferromanganese powder, 26.0% nickel powder, 10.0% chromium powder, 10.0% ferromolybdenum powder, 2.0% ferrovanadium powder, 1.0% copper powder, and rare earth powder according to mass percentage 1.0%, iron powder 40.0%, the sum of the mass percentages of the above components is 100%;

[0052] Step 2: Mix all the raw materials weighed in step 1 evenly, place them in a drying furnace for drying, the drying temperature is 200°C, and the drying time is 2 hours, to obtain the drug core powder;

[0053] Step 3: Place the low-carbon steel strip with a width of 7 mm and a thickness of 0.4 mm on the tape unwinding machine of the welding wire forming machine, roll the stainless steel strip into a U-shaped groove through the pressure groove of the forming machine, and put the medicine obtained in step 3 into a U-shaped groove. The core powder is put into the U-shaped groove, the filling rate of the drug core powder is controlled at 22wt...

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Abstract

The invention discloses a metal flux-cored wire for 25Cr2Ni4MoV steel and a preparing method. The metal flux-cored wire comprises a flux core and welding scale; the flux core is composed of componentsincluding, by mass percent, 1% to 4.0% of ferrosilicon powder, 6.0% to 15.0% of ferromanganese powder, 20.0% to 30.0% of nickel powder, 8% to 15% of chromium powder, 5% to 15% of FeMo powder, 1% to 5% of vanadium iron powder, 1% to 5% of copper powder, 1% to 2% of rare-earth powder and the balance iron. The sum of mass percents of the above components is 100%. The preparing method comprises the steps that raw material powder is matched according to the proportion, and is mixed and dried, the powder is added into a U-shaped groove formed through rolling of low-carbon steel strip, the powder issubject to grinding and closing, drawing, straightening and coiling into a disc, and seal packaging is carried out. The flux-cored wire is attractive in welding seam forming, the martensitic stainless steel weld microstructure can be obtained, the welding joint has the excellent mechanical property, and the preparing method is simple, suitable for an automatic welding machine and batched production.

Description

technical field [0001] The invention belongs to the technical field of metal material welding, and in particular relates to a metal-type flux-cored welding wire for 25Cr2Ni4MoV steel, and also relates to a preparation method of the welding wire. Background technique [0002] In recent years, the use of large-scale fans in my country's industry has become increasingly widespread, and the operating conditions have become more and more complex. In order to improve the overall quality of the fan, the blade material at the core of the fan is required to have good comprehensive mechanical properties such as high strength, toughness and hardness. performance. 25Cr2Ni4MoV is a low-alloy structural steel that is widely used in the core parts of fans, such as the application of fan rotors. Its composition is C: 0.22% to 0.27%, Si: 0.15% to 0.35%, Mn: ≤0.35%, P: ≤ 0.015, S: ≤0.018, Ni: 3.25%-4.00%, Cr: 1.50%-2.00%, Mo: 0.20%-0.50%, V: 0.05%-0.13%, Cu: ≤0.20%. Moreover, 25Cr2Ni4MoV ste...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/0266B23K35/3066B23K35/406
Inventor 张敏程康康王裕李乐慕二龙史杰周玉兰
Owner 西安华瑞力宏焊材技术有限公司
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