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Welding wire for alloy steel-stainless steel composite material transition layer and preparation method of welding wire

A composite material and stainless steel layer technology, applied in welding equipment, metal processing equipment, welding/cutting media/materials, etc., can solve problems such as large residual stress at the bimetal interface, reduce residual stress, reduce carbon migration, and improve production efficiency high effect

Pending Publication Date: 2022-04-15
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a welding wire for alloy steel-stainless steel composite material transition layer, which solves the problem of relatively large residual stress near the bimetallic interface existing in the prior art

Method used

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  • Welding wire for alloy steel-stainless steel composite material transition layer and preparation method of welding wire

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preparation example Construction

[0029] The preparation method of welding wire for alloy steel-stainless steel composite material transition layer comprises the following steps:

[0030] Step 1. Weigh the drug core raw materials according to mass percentage: nickel powder 24-26%, manganese powder 4.5-5.4%, silicon powder 3-3.6%, niobium powder 0.05-0.08%, molybdenum powder 0.08-0.10%, chromium powder 50% -52%, titanium powder 1-2%, lanthanum oxide 0.03-0.04%, the rest is iron powder, the sum of the mass percentages of the above components is 100%;

[0031] Step 2. After mixing the raw materials of the drug core, place them in a material-type furnace, continuously inject argon gas, and keep warm at 150°C-200°C for 1h-2h to obtain the drug core powder;

[0032] Step 3, placing a stainless steel strip (composition as shown in Table 1) with a width of 7 mm and a thickness of 0.3 mm on the tape unwinding machine of the welding wire forming machine, rolling the stainless steel strip into a U-shaped groove through t...

Embodiment 1

[0035] Step 1. Weigh the drug core raw materials according to mass percentage: nickel powder 24%, manganese powder 4.5%, silicon powder 3%, niobium powder 0.056%, molybdenum powder 0.08%, chromium powder 50.5%, titanium powder 1%, lanthanum oxide 0.032 %, the rest is iron powder, and the sum of the mass percentages of the above components is 100%;

[0036] Step 2. After mixing the raw materials of the drug core, place them in a material-type furnace, continuously inject argon gas, and keep the temperature at 150° C. for 1 hour to obtain the drug core powder;

[0037]Step 3. Place the stainless steel strip with a width of 7mm and a thickness of 0.3mm on the belt feeding machine of the wire forming machine, roll the stainless steel strip into a U-shaped groove through the pressure groove of the forming machine, and put the core powder into the U-shaped groove In the process, the filling rate of the core powder is controlled at 24.6wt%, and then the U-shaped groove is rolled and ...

Embodiment 2

[0040] Step 1. Weigh the drug core raw materials according to mass percentage: nickel powder 25%, manganese powder 5%, silicon powder 3.2%, niobium powder 0.07%, molybdenum powder 0.089%, chromium powder 51.3%, titanium powder 1.5%, lanthanum oxide 0.036 %, the rest is iron powder, and the sum of the mass percentages of the above components is 100%;

[0041] Step 2. After mixing the raw materials of the drug core, place them in a material-type furnace, continuously feed argon gas, and keep the temperature at 180°C for 1.5 hours to obtain the drug core powder;

[0042] Step 3. Place the stainless steel strip with a width of 7mm and a thickness of 0.3mm on the belt feeding machine of the wire forming machine, roll the stainless steel strip into a U-shaped groove through the pressure groove of the forming machine, and put the core powder into the U-shaped groove In the process, the filling rate of the core powder is controlled at 25wt%, and then the U-shaped groove is rolled and ...

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Abstract

The invention discloses a welding wire for an alloy steel-stainless steel composite transition layer and a preparation method of the welding wire. A flux core of the welding wire comprises, by mass, 24%-26% of nickel powder, 4.5%-5.4% of manganese powder, 3%-3.6% of silicon powder, 0.05%-0.08% of niobium powder, 0.08%-0.10% of molybdenum powder, 50%-52% of chromium powder, 1%-2% of titanium powder, 0.03%-0.04% of lanthanum oxide and the balance iron powder, and the sum of the mass percentages of the components is 100%. The content of alloy elements such as Ni and Cr in the transition layer is high, the carbon migration phenomenon occurring in the material adding process can be effectively reduced, no obvious recarburization layer or decarburization layer exists, and the mechanical property is excellent; meanwhile, due to the fact that the content of Ni and the content of Cr in the flux-cored wire for the transition layer are high, martensite layers are effectively reduced; the interface residual stress of low alloy steel and martensitic stainless steel is reduced, and the interface strength is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of metal materials, relates to a welding wire for an alloy steel-stainless steel composite material transition layer, and also relates to a preparation method of the welding wire. Background technique [0002] With the rapid development of the economy, the requirements for the performance of materials are increasing. It is difficult for a single material to meet the actual production needs due to the limitations of certain working conditions. It is urgent to develop composite materials that integrate the excellent properties of various materials. Alloy steel-stainless steel composite materials combine the excellent corrosion resistance of stainless steel and the good mechanical properties of alloy steel, and are widely used in marine engineering, petrochemical, nuclear power and other fields. [0003] Wire-arc additive manufacturing (WAAM) uses gas metal arc welding, argon tungsten arc welding or plasma weld...

Claims

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Application Information

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IPC IPC(8): B23K35/02B23K35/30B23K35/40B23K103/04B23K103/16
Inventor 张敏刘智博郜雅彦曹齐鲁张志强李毅
Owner XIAN UNIV OF TECH
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