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Flux-cored wire having high abrasion resistance and application thereof

A flux-cored wire, high wear resistance technology, used in welding media, manufacturing tools, welding equipment and other directions, can solve the problems of short service life, poor wear resistance, etc., to improve strength, improve wear resistance, good wear resistance The effect of particle wear performance

Inactive Publication Date: 2013-08-14
王井丽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of poor wear resistance and short service life of existing flux-cored welding wire for the repair of shield machine tools, the present invention provides a flux-cored welding wire with high wear resistance and its application, which can be used for shield machine tools Surfacing welding repair, the repaired tool not only has good wear resistance, but also has good toughness and strong impact resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A flux-cored welding wire with high wear resistance, including a sheath and a flux core, the sheath being stainless steel. The composition and mass percentage of the drug core are: tungsten carbide: 5.0%; boron powder: 2.0%; vanadium powder: 2.0%; manganese powder: 9%; chromium powder: 32%; niobium powder: 1.5%; cerium oxide: 0.5%; Lanthanum oxide: 1.1%; Yttrium oxide: 0.7%; Quartz: 4.2%; Magnesia: 3.5%; Calcium fluoride: 3.8%; the balance is rutile and carbon powder, and the total content of C in the drug core is 6.2% .

[0020] This kind of flux-cored welding wire with high wear resistance is used in the surfacing welding repair of shield machine blades. After surfacing welding, the structure of the surfacing layer is mainly martensite + network carbide + massive carbide + a small amount of retained austenite, with high hardness and good wear resistance. When welding the shield machine blade, it has the advantages of less spatter, good stability, uniform slag covera...

Embodiment 2

[0022] A flux-cored welding wire with high wear resistance, including a sheath and a flux core, the sheath being stainless steel. The composition and mass percentage of the drug core are: tungsten carbide: 4.9%; boron powder: 2.1%; vanadium powder: 1.9%; manganese powder: 10%; chromium powder: 30%; niobium powder: 2%; cerium oxide: 1%; Lanthanum oxide: 0.8%; Yttrium oxide 0.2%; Quartz: 4.5%; Magnesia: 2.0%; Calcium fluoride: 3.5%; the balance is rutile and carbon powder, and the total content of C in the drug core is 6.0%.

[0023] This kind of flux-cored welding wire with high wear resistance has the advantages of less spatter, good stability, uniform slag coverage and easy slag removal when welding shield machine blades. The welded tool has fewer defects and the appearance of the weld is beautiful. , good wear resistance and toughness.

Embodiment 3

[0025] A flux-cored welding wire with high wear resistance, including a sheath and a flux core, the sheath being stainless steel. The core composition and mass percentage are: tungsten carbide: 5.0%; boron powder: 2.0%; vanadium powder: 2.1%; manganese powder: 8%; chromium powder: 35%; niobium powder: 1%; cerium oxide: 0.8%; Lanthanum oxide: 1.3%; Yttrium oxide 0.2%; Quartz: 4.0%; Magnesia: 3.1%; Calcium fluoride: 4.0%; the balance is rutile and carbon powder, and the total content of C in the drug core is 6.5%.

[0026] This kind of flux-cored welding wire with high wear resistance has the advantages of less spatter, good stability, uniform slag coverage and easy slag removal when welding shield machine blades. The welded tool has fewer defects and the appearance of the weld is beautiful. , good wear resistance and toughness.

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PUM

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Abstract

The invention discloses a flux-cored wire having high abrasion resistance and application thereof and belongs to the field of welding materials. The flux-cored wire comprises a skin and a flux core. The flux core comprises, by mass, 4.9-5.0% of tungsten carbide, 2.0-2.1% of boron powder, 1.9-2.1% of vanadium powder, 8-10% of manganese powder, 30-35% of chromium powder, 1-2% of niobium powder, 0.5-1% of cerium oxide, 0.8-1.3% of lanthanum oxide, yttrium oxide, 4.0-4.5% of quartz, 2.0-3.5% of magnesite, 3.5-4.0% of fluoride, and the balance rutile and carbon powder, wherein the total content of C in the flux core is 6.0-6.5%. The flux-cored wire has the advantages that the flux-cored wire splashes little, is good in stability, has easiness in deslagging and is good in abrasion resistance and toughness and slag is covered evenly. The flux-cored wire is particularly high in impact resistance and suitable for cutter welding having high requirements for abrasion resistance and toughness.

Description

technical field [0001] The invention belongs to the field of welding materials, and in particular relates to a flux-cored welding wire, and more specifically relates to a flux-cored welding wire with high wear resistance and its application. Background technique [0002] Shield tunnel boring machine, referred to as shield machine, is a kind of special engineering machinery for tunnel boring. Modern shield tunnel boring machine integrates light, mechanics, electricity, hydraulics, sensing and information technology. It has the functions of excavating and cutting soil, Functions such as conveying soil muck, assembling tunnel lining, and surveying and guiding deviation correction involve multiple disciplines and technologies such as geology, civil engineering, machinery, mechanics, hydraulics, electricity, control, and surveying, and require "tailor-made" design and manufacture according to different geology , high reliability requirements. Shield boring machines have been wid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/24B23K9/04
Inventor 王井丽其他发明人请求不公开姓名
Owner 王井丽
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