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Self-lubricating wear-resistant flux-cored wire containing nickel-coated graphite component and welding method thereof

A technology of nickel-coated graphite and flux-cored welding wire is applied in the field of self-lubricating wear-resistant flux-cored welding wire containing nickel-coated graphite and its welding, which can solve the burning loss of graphite phase and alloy elements, waste air environment of alloy elements, and affect the surfacing welding. Layer wear resistance and other issues, to achieve the effects of less welding fume, improved deposition rate, and stable arc

Pending Publication Date: 2020-10-16
TIANJIN SINO GERMAN VOCATIONAL TECHNICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To achieve high deposition rate of welding wire, the welding current needs to be increased, and the burning loss of graphite phase and alloying elements is serious, resulting in waste and loss of alloying elements and pollution of the air environment, which affects the wear resistance of the surfacing layer.

Method used

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  • Self-lubricating wear-resistant flux-cored wire containing nickel-coated graphite component and welding method thereof
  • Self-lubricating wear-resistant flux-cored wire containing nickel-coated graphite component and welding method thereof
  • Self-lubricating wear-resistant flux-cored wire containing nickel-coated graphite component and welding method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0034] 2. Preparation of surfacing layer:

[0035] Example:

[0036] Using the self-built double constant current source arc hot wire GTAW welding system, on the 6mm thick Q235 steel plate, the self-designed flux-cored wear-resistant welding wire containing nickel-coated graphite is used for surfacing welding. Its process parameters are: welding voltage: 22-26V; main arc current: 240A; auxiliary arc current: 120A; wire feeding speed: 2.4m / min; welding speed: 3.5mm / s ； Distance between tungsten electrode and workpiece: 7-8mm; distance between tungsten electrode and welding wire: 2-3mm; shielding gas flow rate: 15L / min.

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Abstract

The invention belongs to the field of welding materials, and particularly relates to a self-lubricating wear-resistant flux-cored wire containing a nickel-coated graphite component and a welding method thereof. The self-lubricating wear-resistant flux-cored wire containing the nickel-coated graphite component comprises a flux core and a carbon steel strip used for wrapping the flux core, wherein the flux core comprises the following components of, in percentage by mass, 18-22% of ferrochrome, 7-9% of ferroboron, 3-5% of ferrosilicon, 3-5% of ferromanganese, 0.4-0.6% of metallic aluminum, 2-3%of rare earth elements, 3-5% of nickel-coated graphite and the balance iron. According to the flux-cored wire containing the nickel-coated graphite powder, a hardfacing layer prepared through a double-constant-current-source molten-drop-free electric arc hot wire GTAW surfacing method has a self-lubricating function.

Description

technical field [0001] The invention belongs to the field of welding materials, in particular to a self-lubricating wear-resistant flux-cored welding wire containing nickel-coated graphite and a welding method thereof. Background technique [0002] The frictional heat generated by the relative motion of the friction and wear parts will increase the temperature of the friction surface, and the use of liquid lubrication will make the working environment of the friction parts worse, while solid lubrication has been widely used in recent years because of its good stability in high temperature working environments in the field of wear resistance. Graphite solid lubricants have attracted the attention of researchers because of their excellent lubricating properties. [0003] Using surface technology to prepare a wear-resistant layer containing solid lubricating materials on the surface of the original workpiece, a low-shear strength lubricating film can be formed between the fric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/02B23K35/30B23K9/04
CPCB23K9/04B23K35/0266B23K35/3053
Inventor 田春英王军吕达徐晨毅陈龙
Owner TIANJIN SINO GERMAN VOCATIONAL TECHNICAL COLLEGE
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