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Flux-cored wire for additive manufacturing and preparation method of low-alloy high-strength steel

A technology of additive manufacturing and flux-cored welding wire, which is applied in the direction of manufacturing tools, additive processing, welding equipment, etc., which can solve the problems of restricting the development of additive manufacturing technology, material waste, and the inability of alloy steel and stainless steel to achieve additive manufacturing. , to achieve good surfacing effect, reduce spatter, and achieve the effect of rapid manufacturing

Active Publication Date: 2020-07-03
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the field of additive manufacturing of metal parts, additive manufacturing processes such as electric arc, laser, electron beam, and plasma can better realize parts manufacturing and molding. However, due to the development of raw materials, some alloy steel and stainless steel cannot achieve additive manufacturing. material manufacturing, which has become a major obstacle restricting the development of additive manufacturing technology
[0003] Low-alloy high-strength steel not only has high strength, but also has good plasticity and toughness. It is usually used to manufacture important parts with high load bearing and large cross-section, such as fan impeller, main shaft and generator rotor, etc. Low-alloy high-strength steel Flux-cored welding wire for additive manufacturing is currently blank in the domestic market, resulting in the use of traditional subtractive manufacturing methods for related parts and components, resulting in serious waste of materials

Method used

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  • Flux-cored wire for additive manufacturing and preparation method of low-alloy high-strength steel
  • Flux-cored wire for additive manufacturing and preparation method of low-alloy high-strength steel
  • Flux-cored wire for additive manufacturing and preparation method of low-alloy high-strength steel

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preparation example Construction

[0046] The second technical solution of the present invention is a method for preparing low-alloy high-strength steel, which uses a flux-cored welding wire for additive manufacturing to prepare low-alloy high-strength steel. The specific implementation steps are as follows:

[0047] Step 1: Weigh 2.00% to 3.83% of ferromanganese powder, 16.95% to 20.85% of nickel powder, 8.35% to 11.65% of chromium powder, 1.05% to 3.00% of molybdenum powder, 0.90% to 1.62% of ferrovanadium powder, and 0.05% of boron powder %~0.10%, ferrosilicon powder 2.16%~10.82%, ferrosilicon powder 0.5%~1.5%, aluminum magnesium powder 0.50%~1.00%, rare earth element 0.80%~1.00%, the rest is iron powder, the mass percentage of the above components The sum is 100%; then the weighing raw material powder is dried in step 1. Specifically, the raw material powder is dried in a vacuum drying furnace, the drying temperature is 240°C-260°C, and the drying time is 2h- 3h;

[0048] Step 2: First, roll the Q235A low-...

Embodiment 1

[0051] Step 1: Weigh 2.00% ferromanganese powder, 20.0% nickel powder, 9.0% chromium powder, 1.50% molybdenum powder, 1.62% ferrovanadium powder, 0.08% boron powder, 2.16% ferro-titanium powder, and ferrosilicon powder according to mass percentage 1.5%, aluminum magnesium powder 0.50%, rare earth elements 0.90%, the rest is iron powder, 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, and dry in a vacuum drying furnace at a drying temperature of 240°C to 260°C for 2 hours to obtain a drug core powder;

[0053] Step 3: Place the Q235A low-carbon steel strip with a width of 7mm and a thickness of 0.3mm on the tape unwinding machine of the welding wire forming machine, and roll the Q235A low-carbon steel strip into a U-shaped groove through the pressure groove of the forming machine. 2 Fill the obtained drug core powder into the U-shaped groove, the filling rate of the drug core powder is control...

Embodiment 2

[0057] Step 1: Weigh 3.83% ferromanganese powder, 16.95% nickel powder, 11.65% chromium powder, 2.50% molybdenum powder, 1.40% ferrovanadium powder, 0.05% boron powder, 3.90% ferro-titanium powder, and ferrosilicon powder according to mass percentage 1.0%, aluminum magnesium powder 0.70%, rare earth elements 1.0%, the rest is iron powder, the sum of the mass percentages of the above components is 100%;

[0058] Step 2: Mix all the raw materials weighed in step 1 evenly, place them in a drying furnace for drying, the drying temperature is 240°C-260°C, and the drying time is 3 hours, to obtain the drug core powder;

[0059] Step 3: Place the Q235A low-carbon steel strip with a width of 7mm and a thickness of 0.3mm on the tape unwinding machine of the welding wire forming machine, and roll the Q235A low-carbon steel strip into a U-shaped groove through the pressure groove of the forming machine. 2 Fill the obtained drug core powder into the U-shaped groove, the filling rate of th...

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Abstract

The invention discloses a flux-cored wire for additive manufacturing. The wire comprises a flux core and sheet steel. The flux core is composed of, by mass percent, 2.00%-3.83% of ferromanganese powder, 16.95%-20.85% of nickel powder, 8.35%-11.65% of chromium powder, 1.05%-3.00% of molybdenum powder, 0.90%-1.62% of ferrovanadium powder, 0.05%-0.10% of boron powder, 2.16%-10.82% of ferrotitanium powder, 0.5%-1.5% of ferrosilicon powder, 0.50%-1.00% of aluminum-magnesium powder, 0.80%-1.00% of rare earth elements and the balance being iron powder, wherein the sum of the mass percents of the components is 100%. The flux-cored wire is a wire used for arc additive manufacturing of low-alloy steel applied to a fan impeller. The invention further discloses a preparation method of low-alloy high-strength steel. The flux-cored wire has excellent comprehensive mechanical properties; and by the adoption of an additive manufacturing mode, the low-alloy high-strength steel can meet the requirementon the mechanical properties and is efficient and convenient to use.

Description

technical field [0001] The invention belongs to the field of arc additive manufacturing, and in particular relates to a flux-cored welding wire for additive manufacturing, and also relates to a preparation method of low-alloy high-strength steel. Background technique [0002] In recent years, additive manufacturing technology has developed rapidly and has become an important direction in the development of the manufacturing field. Countries all over the world regard additive manufacturing technology as a new growth point for future industrial development. Compared with traditional manufacturing methods, additive manufacturing technology has obvious advantages. It not only solves the problems of traditional methods such as long manufacturing cycle and serious material waste, but also greatly reduces processing and manufacturing costs, becoming a new method for complex parts manufacturing. At present, in the field of additive manufacturing of metal parts, additive manufacturin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/368B23K35/40B23K35/38B23K9/173B23K9/04B33Y10/00B23K103/04
CPCB23K35/3066B23K35/368B23K35/406B23K35/383B23K9/173B23K9/044B33Y10/00B23K2103/04
Inventor 张敏许帅王博玉仝雄伟董玉凡张云龙
Owner XIAN UNIV OF TECH
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