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Cored welding strip applied in resurfacing welding and preparation method thereof

A technology of welding strips and medicines, which is applied in welding equipment, manufacturing tools, welding media, etc., can solve the problems that the performance of the welding process needs to be improved, the powder of the core strip electrode is easy to move, and the application range is limited, so as to increase the variety and application range, avoid powder migration, and improve the effect of process performance

Inactive Publication Date: 2009-12-09
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the existing surfacing welding materials, especially the problems of difficult manufacture, few varieties, limited application range, easy movement of core and strip electrode powder, poor rigidity, and welding process performance to be improved, the present invention proposes A new type of surfacing flux cored ribbon and its preparation method

Method used

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  • Cored welding strip applied in resurfacing welding and preparation method thereof
  • Cored welding strip applied in resurfacing welding and preparation method thereof
  • Cored welding strip applied in resurfacing welding and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1: Preparation of surfacing flux-cored welding strip

[0050] (1) A commercially available SPCC low-carbon steel strip with a thickness of 0.4mm was selected, and a lower steel strip 1 with a width of 78mm and an upper steel strip 2 with a width of 72mm were slit by using conventional strip slitting equipment.

[0051] (2) The surfacing metal is low-alloy steel. The content of alloy elements in the welding strip is calculated by mass percentage, 0.4%C, 0.8%Mn, 0.5%Si, 3.2%Cr, 0.035%S, 0.03%P, and the rest is Fe. Use powdered metal and alloy compounding powder, add aluminum powder with 1% of the mass of the welding ribbon to the powder, and use conventional powder mixing equipment to mix the powder for 20 minutes to obtain the drug powder 4 of the flux-cored welding ribbon.

[0052] (3) Using the existing rolling technology and special equipment, roll it along the length direction (longitudinal direction) of the lower steel strip 1 into a cross-sectional width o...

Embodiment 2

[0059] Example 2: Preparation of surfacing flux-cored welding strip

[0060] (1) A commercially available SPCC low-carbon steel strip with a thickness of 0.5 mm is selected, and a lower steel strip 1 with a width of 56 mm and an upper steel strip 2 with a width of 46 mm are slit by using conventional strip slitting equipment.

[0061] (2) The surfacing metal is alloy cast iron, and the content of alloy elements in the welding strip is calculated as mass percentage, 5.8%C, 0.9%Mn, 0.6%Si, 26.5%Cr, 2.1%Mo, 1.2%B, 3.1%V , 0.035% S, 0.03% P, and the rest is Fe. The drug powder is powdered metal and alloy compounding powder, and the powder is mixed for 20 minutes by conventional powder mixing equipment to obtain the drug powder 4 of the flux-cored ribbon.

[0062] (3) Utilize the existing rolling technology and special equipment, along the length direction (longitudinal direction) of the lower steel strip 1, it is rolled into a "cross-sectional width" of 40mm. " shaped groove, a...

Embodiment 3

[0069] Example 3: Preparation of surfacing flux-cored ribbon

[0070] (1) A commercially available SPCC low-carbon steel strip with a thickness of 0.4 mm is selected, and a lower steel strip 1 with a width of 105 mm and an upper steel strip 2 with a width of 140 mm are slit by using conventional strip slitting equipment.

[0071] (2) The surfacing metal is high-chromium steel, and the content of alloy elements in the welding strip is calculated as mass percentage, 0.10%C, 0.8%Mn, 0.7%Si, 15.2%Cr, 0.5%Mo, 1.8%Ni, 1.2% W, 0.025% S, 0.03% P, the rest being Fe. The drug powder is made of powdered metal and alloy compounding powder, and the powder is mixed for 25 minutes by conventional powder mixing equipment to obtain the drug powder 4 of the flux-cored ribbon.

[0072] (3) Using existing rolling technology and special equipment, it is rolled along the length direction (longitudinal direction) of the lower steel strip 1 into "" with a cross-sectional width of 90 mm " shaped groo...

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Abstract

The invention discloses a novel resurfacing welding cored welding strip which consists of a steel tube circled by steel strips and drug powder wrapped in the steel tube, the steel strips comprises an upper steel strip and a lower steel strip which can be purchased in the market. The shape of the steel tube circled by steel strips is that the longitudinal cross section is long flat form or rectangle-like shape, the longitudinal length is determined at will, and the steel tube can be cut out at will or winded into a tray according to requirements. The transverse edges of the upper steel strip and the lower steel strip are connected at the upper steel strip side in a related joint form, and the drug powder is filled in the steel tube circled by the steel strips evenly with the filling rate being 20-80%. According to the different types of resurfacing metals, the content of alloy element in the resurfacing welding cored welding strip is different. The cored welding strip has simple production equipment and technique, and low production cost, thus overcoming the defect that alloy welding filament used for filament resurfacing welding is difficult to produce and the problems of large investment on production equipment, high production cost and expensive price in cored welding filament production.

Description

technical field [0001] The invention relates to a surfacing flux-cored welding strip and a preparation method thereof. Background technique [0002] Most of the mechanical parts are made of metal materials, and wear will occur due to the relative movement between parts or between parts and materials. With the development of modern industry, mechanical parts often work under extremely complex and harsh conditions, and a large number of mechanical equipment are often scrapped due to wear and tear. This requires the surface of mechanical equipment under heavy loads and other working conditions to have good durability. grinding performance. [0003] Overlay welding is widely used in the manufacture or repair of wear-resistant parts due to its simple process, low equipment investment, flexible operation and wide adaptability. Manual arc surfacing, oxyacetylene flame surfacing, submerged arc automatic surfacing, gas shielded surfacing, plasma surfacing, electroslag surfacing, et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/02B23K35/30B23K35/40
Inventor 孙俊生孙逸群
Owner SHANDONG UNIV
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