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Metal type flux-cored welding wire for 25cr2ni4mov steel and its preparation method

A technology of flux-cored welding wire and metal type, which is applied in the direction of metal processing equipment, welding equipment, manufacturing tools, etc., can solve the problems that have not been reported on fusion welding gas-protected flux-cored welding wire, and achieve excellent mechanical properties and corrosion resistance. The effect of beautiful weld shape and simple preparation method

Active Publication Date: 2020-08-18
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 ferrosilicon powder 1%-4.0%, ferromanganese powder 6.0%-15.0%, nickel powder 20.0%-30.0%, chromium powder 8%-15%, molybdenum powder 5%-15%, respectively. %, vanadium iron powder 1%~5%, copper powder 1%~5%, rare earth powder 1%~2%, the rest is iron, the sum of the above component mass percentages is 100%;

[0038] Step 2: Mix all the raw materials weighed in step 1 uniformly, and place them in a drying oven for drying at a drying temperature of 200°C-300°C and a drying time of 2-3 hours to obtain a core powder;

[0039] Step 3: Use a flux-cored wire making machine to wrap the powder core powder obtained in step 2 in a low-carbon steel strip, and use a forming machine to close the low-carbon steel strip, and then proceed to the first drawing process. The diameter of the abrasive tool used in the secondary drawing process is 2.0mm; in step...

Embodiment 1

[0044] Step 1: Weigh ferrosilicon powder 3.0%, ferromanganese powder 8.0%, nickel powder 30.0%, chromium powder 8.0%, molybdenum powder 5.0%, vanadium iron powder 1.0%, copper powder 2.0%, rare earth powder 1.0%, iron powder 42.0%, the total mass percentage of the above components is 100%;

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

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

Embodiment 2

[0051] Step 1: Weigh ferrosilicon powder 4.0%, ferromanganese powder 6.0%, nickel powder 26.0%, chromium powder 10.0%, molybdenum powder 10.0%, vanadium iron powder 2.0%, copper powder 1.0%, rare earth powder 1.0%, iron powder 40.0%, the total mass percentage of the above components is 100%;

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

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

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PUM

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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 specifically relates to a metal type flux-cored welding wire for 25Cr2Ni4MoV steel. The invention also relates to a preparation method of the welding wire. Background technique [0002] In recent years, large fans have been widely used in my country’s industry, 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 high strength, toughness and hardness. performance. 25Cr2Ni4MoV is a low-alloy structural steel that is widely used in the core part of a fan. For example, in the application of a fan rotor, its composition is C: 0.22%~0.27%, Si: 0.15%~0.35%, Mn: ≤0.35%, P: ≤ 0.015, S: ≤0.018, Ni: 3.25% to 4.00%, Cr: 1.50% to 2.00%, Mo: 0.20% to 0.50%, V: 0.05% to 0.13%, Cu: ≤0.20%. Moreover, 25Cr2Ni4MoV steel is widely used in important parts of national defense and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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