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Flux core, preparation method of flux core, flux-cored wire and welding method

A technology of flux cored wire and flux core, which is applied in the field of preparation of flux core, flux core, flux cored wire and welding, which can solve the problems of difficulty in guaranteeing the performance of welded joints, poor strength and toughness of welded joints, and difficulty in realizing automatic connection, etc.

Active Publication Date: 2021-06-01
HUANENG POWER INT INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The connection and defect repair of the commonly used parts of the airframe often require welding methods, but the weldability of CB2 heat-resistant steel is poor, and the performance of welded joints is difficult to guarantee
At present, electrode arc welding is used as the connection method, but the strength and toughness of the welded joints prepared are poor, and it is difficult to realize automatic connection, which makes the production efficiency low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The preparation method of drug core of the present invention comprises the following steps:

[0023] 1) Weighing metallic nickel, metallic chromium, metallic manganese, metallic molybdenum, metallic cobalt, metallic vanadium, silicon and iron;

[0024] 2) Mix metal nickel, metal chromium, metal manganese, metal molybdenum, metal cobalt, metal vanadium, silicon and iron evenly, and then dry to obtain drug core powder;

[0025] 3) Place the steel strip on the strip-releasing machine of the welding wire forming machine, roll the steel strip into a U-shaped groove through the pressure groove of the forming machine, and then fill the core powder into the U-shaped groove, wherein the filling of the core powder The rate is 24%-28%, and then use the forming machine and the mold to close the U-shaped groove, and finally draw the flux-cored wire with the wire diameter of the preset size through the mold;

[0026] 4) Straighten the flux-cored welding wire with a coiler to obtain ...

Embodiment 1

[0035] The core of the present invention comprises 18% metallic nickel, 14% metallic chromium, 0.8% metallic manganese, 1.7% metallic molybdenum, 1.7% metallic cobalt, 0.2% metallic vanadium, 0.4% metallic Made of silicon, 63.2% iron.

[0036] The preparation method of drug core of the present invention comprises the following steps:

[0037] 1) Weighing metallic nickel, metallic chromium, metallic manganese, metallic molybdenum, metallic cobalt, metallic vanadium, silicon and iron;

[0038] 2) Mix metal nickel, metal chromium, metal manganese, metal molybdenum, metal cobalt, metal vanadium, silicon and iron evenly, and then dry to obtain drug core powder;

[0039] 3) Place the 7×0.4mm 316L stainless steel strip on the strip feeding machine of the welding wire forming machine, roll the steel strip into a U-shaped groove through the pressure groove of the forming machine, and then fill the core powder into the U-shaped groove, Among them, the filling rate of the flux core pow...

Embodiment 2

[0049] The core of the present invention comprises 19% metallic nickel, 15% metallic chromium, 1% metallic manganese, 1.8% metallic molybdenum, 1.9% metallic cobalt, 0.3% metallic vanadium, 0.5% metallic Made of silicon, 60.5% iron.

[0050] The preparation method of drug core of the present invention comprises the following steps:

[0051] 1) Weighing metallic nickel, metallic chromium, metallic manganese, metallic molybdenum, metallic cobalt, metallic vanadium, silicon and iron;

[0052] 2) Mix metal nickel, metal chromium, metal manganese, metal molybdenum, metal cobalt, metal vanadium, silicon and iron evenly, and then dry to obtain drug core powder;

[0053]3) Place the 7×0.4mm 316L stainless steel strip on the strip feeding machine of the welding wire forming machine, roll the steel strip into a U-shaped groove through the pressure groove of the forming machine, and then fill the core powder into the U-shaped groove, Among them, the filling rate of the core powder is 2...

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PUM

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Abstract

The invention discloses a flux core, a preparation method of the flux core, a flux-cored wire and a welding method. The flux core is prepared from the components including, by mass, 18%-24% of metallic nickel, 14%-20% of metallic chromium, 0.8%-1.4% of metallic manganese, 1.7%-2.2% of metallic molybdenum, 1.7%-2.6% of metallic cobalt, 0.2%-0.5% of metallic vanadium, 0.4%-0.9% of silicon and the balance iron. According to the flux-cored wire, the connection quality of CB2 heat-resistant steel is improved, automatic welding can be achieved, and the production efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of metal material welding, and relates to a flux core, a preparation method of the flux core, a flux-cored welding wire and a welding method. Background technique [0002] With the rapid development of the economy, my country's social demand for electricity continues to grow. However, thermal power generation is still the main power generation method, and its high pollution cannot be ignored. In order to reduce pollution and improve power generation efficiency, it is necessary to vigorously develop ultra-supercritical thermal power unit technology. The operating parameters of ultra-supercritical thermal power units are relatively high, and they also have high requirements on the performance of the materials used for unit components. Generally, heat-resistant steel is used to manufacture unit components. Since CB2 heat-resistant steel has high creep strength, good thermal conductivity, good intergranular cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/02B23K35/30B23K35/40
CPCB23K35/0266B23K35/40B23K35/3053
Inventor 田晓徐慧秦承鹏李太江李芳草梁碧珂
Owner HUANENG POWER INT INC
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