Metal type flux-cored wire and method of manufacturing austenitic stainless steel structural part

A technology of austenitic stainless steel and flux-cored welding wire, applied in metal processing equipment, welding accessories, welding equipment, etc., can solve problems such as difficulty, high manufacturing cost, and prone to defects, etc., achieve high production efficiency and improve fatigue resistance Ability, the effect of reducing welding residual stress

Active Publication Date: 2020-11-27
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the austenitic stainless steel structural parts in our country are all manufactured by traditional techniques (casting, forging). This process is difficult, expensive and prone to defects when manufacturing large structural parts.

Method used

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  • Metal type flux-cored wire and method of manufacturing austenitic stainless steel structural part
  • Metal type flux-cored wire and method of manufacturing austenitic stainless steel structural part
  • Metal type flux-cored wire and method of manufacturing austenitic stainless steel structural part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]Step 1: Weigh 8% of ferrosilicon, 18% of manganese powder, 27% of nickel powder, 26% of chromium powder, 5% of molybdenum powder, 2.5% of copper powder, 0.5% of titanium powder, 0.2% of aluminum powder, 0.5% of lanthanum, 1% of niobium carbide, and the rest are iron powder. The sum of the percentages of the above components is 100%.

[0045] Step 2: Mix all the raw materials weighed in step 1 evenly and place them in a tube furnace, keep the temperature at 200° C. for 2 hours under the condition of continuously feeding argon.

[0046] Step 3: Place the low-carbon steel strip with a width of 7mm and a thickness of 0.3mm on the belt-releasing machine of the welding wire forming machine, and roll the low-carbon steel strip into a U-shaped groove through the pressure groove of the forming machine, and obtain in step 2 The drug core powder is put into the U-shaped groove, the filling rate of the drug core powder is controlled at 15wt%, and then the U-shaped groove is rolled a...

Embodiment 2

[0049] Step 1: Weigh ferrosilicon 8%, manganese powder 19%, nickel powder 27%, chromium powder 26%, molybdenum powder 7%, copper powder 2%, titanium powder 0.5%, aluminum powder 0.2%, oxide 0.5% of lanthanum, 1% of niobium carbide, and the rest is iron powder. The sum of the percentages of the above components is 100%.

[0050] Step 2: Mix all the raw materials weighed in step 1 evenly, place in a tube furnace, and keep warm at 230° C. for 3 hours under the condition of continuously feeding argon.

[0051] Step 3: Place the low-carbon steel strip with a width of 7mm and a thickness of 0.3mm on the belt-releasing machine of the welding wire forming machine, and roll the low-carbon steel strip into a U-shaped groove through the pressure groove of the forming machine, and obtain in step 2 The drug core powder is put into the U-shaped groove, the filling rate of the drug core powder is controlled at 15wt%, and then the U-shaped groove is rolled and closed with a molding machine, w...

Embodiment 3

[0054] Step 1: Weigh 8% of ferrosilicon, 20% of manganese powder, 27% of nickel powder, 26% of chromium powder, 4% of molybdenum powder, 1.5% of copper powder, 0.5% of titanium powder, 0.2% of aluminum powder, and 0.5% of lanthanum, 1% of niobium carbide, and the rest are iron powder. The sum of the percentages of the above components is 100%.

[0055] Step 2: Mix all the raw materials weighed in step 1 evenly, place in a tube furnace, and keep warm at 250° C. for 2.5 hours under the condition of continuously feeding argon.

[0056] Step 3: Place the low-carbon steel strip with a width of 7mm and a thickness of 0.3mm on the belt-releasing machine of the welding wire forming machine, and roll the low-carbon steel strip into a U-shaped groove through the pressure groove of the forming machine, and obtain in step 2 The drug core powder is put into the U-shaped groove, the filling rate of the drug core powder is controlled at 15wt%, and then the U-shaped groove is rolled and close...

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Abstract

The invention discloses a metal type flux-cored wire. The metal type flux-cored wire is adopted as a raw material, an austenitic stainless steel structural part is manufactured on the basis of an electric arc additive manufacturing technology, and the formed thin-wall structural part has excellent mechanical properties. Flux-cored alloy of the metal type flux-cored wire comprises, by mass percentage, 8% of silicon iron, 18%-22% of manganese powder, 27% of nickel powder, 26% of chromium powder, 4%-8% of molybdenum powder, 1%-3% of copper powder, 0.5% of titanium powder, 0.2% of aluminum powder,0.5% of lanthanum oxide, 1% of niobium carbide and the balance iron powder. The sum of the mass percentages of the components is 100%. The austenitic stainless steel thin-wall structural part obtained through additive manufacturing is attractive in appearance and has the excellent mechanical properties. The austenitic stainless steel metal type flux-cored wire for additive manufacturing can be used for additive manufacturing of complex parts in the fields of national defense, energy, petroleum, chemical engineering, aerospace and bioengineering.

Description

technical field [0001] The invention belongs to the technical field of wire arc additive manufacturing, and specifically relates to a metal-type flux-cored welding wire, and also relates to a method for preparing an austenitic stainless steel structural part by using the above-mentioned metal-type flux-cored welding wire as a raw material. Background technique [0002] Stainless steel is one of the three pillar materials in my country, and with the rapid development of my country's modern industry, higher requirements are put forward for the comprehensive mechanical properties of stainless steel. With its good comprehensive properties, austenitic stainless steel has been widely used in the fields of national defense, energy, petroleum, chemical industry, aerospace and biological engineering. [0003] At present, the austenitic stainless steel structural parts in our country are manufactured by traditional technology (casting, forging). This process is difficult, high in manu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K9/173B23K9/235B23K9/32
CPCB23K35/304B23K9/173B23K9/235B23K9/32
Inventor 张敏王博玉许帅仝雄伟朱子越苟川东郝琛
Owner XIAN UNIV OF TECH
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