Roller overlaying powder with thin-layer slag protection

A technology of powder and roll is applied in the field of roll surfacing welding powder and welding powder to achieve the effect of easy promotion, easy acquisition and improvement of welding seam forming.

Inactive Publication Date: 2014-06-18
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The application of the torch with dual functions of powder feeding and gas feeding lays a solid foundation for obtaining a high-alloy wear-resistant layer on the surface of the substrate, reducing the cost of welding materials, obtaining a good surface quality of the surfacing layer, reducing welding spatter, improving arc stability, and improving weld formation. However, there are few reports on the roller surfacing welding powder specially used for welding torches with powder feeding and gas feeding functions.

Method used

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  • Roller overlaying powder with thin-layer slag protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] For the structure of the welding torch see figure 1 . The specific dimensions are as follows:

[0038] A conductive rod is provided on the center line of the welding torch. The conductive rod is a cylinder with an outer diameter of Φ6mm. The inner diameter of the conductive rod is Φ3mm. The conductive rod is made of red copper. The thickness of the insulating layer between the conductive rod and the connector is 1 mm, and the insulator is made of high-temperature-resistant rubber. The nominal diameter of the threaded hole on the lower surface of the conductive rod is M3 (ie 3mm), and the height is 5mm. It is matched with the conductive tip, and the conductive tip is a commercially available conductive tip for gas shielded welding.

[0039] The two powder feeding pipes are symmetrically installed on both sides of the conductive rod. The powder feeding pipes are fixed on the connecting piece through two through holes with a diameter of Φ5mm on the connecting piece. The ...

Embodiment 2

[0048] For the structure of the welding torch see figure 1 . The specific dimensions are as follows:

[0049] A conductive rod is provided on the center line of the welding torch. The conductive rod is a cylinder with an outer diameter of Φ7mm. The inner diameter of the conductive rod is Φ4mm. The conductive rod is made of red copper. The thickness of the insulating layer between the conductive rod and the connector is 2 mm, and the insulator is made of high-temperature-resistant rubber. The nominal diameter of the threaded hole on the lower surface of the conductive rod is M4, and the height is 8mm. It is matched with the conductive tip. The conductive tip is a commercially available conductive tip for gas shielded welding.

[0050] The two powder feeding pipes are symmetrically installed on both sides of the conductive rod. The powder feeding pipes are fixed on the connecting piece through two through holes with a diameter of Φ7mm on the connecting piece. The inner diamete...

Embodiment 3

[0059] For the structure of the welding torch see figure 1 . The specific dimensions are as follows:

[0060] A conductive rod is provided on the center line of the welding torch. The conductive rod is a cylinder with an outer diameter of Φ6.5mm. The inner diameter of the conductive rod is Φ2.5mm. The conductive rod is made of red copper. The thickness of the insulation layer between the conductive rod and the connector is 1.5mm, and the insulator is made of high temperature resistant plastic. The nominal diameter of the threaded hole on the lower surface of the conductive rod is M3 (that is, the nominal diameter is 3mm), and the height is 6mm. It is matched with the conductive tip. The conductive tip is a commercially available conductive tip for gas shielded welding.

[0061] The two powder feeding pipes are symmetrically installed on both sides of the conductive rod. The powder feeding pipes are fixed on the connecting piece through two through holes with a diameter of Φ6...

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Abstract

The invention discloses a roller overlaying powder with thin-layer slag protection. The roller overlaying powder is prepared by uniformly mixing an alloy with a slagging arc stabilizer, wherein the content of the alloy is 88-92 wt% and the content of the slagging arc stabilizer is 12-8 wt%. The powder provided by the invention is applied to a welding cabinet with double functions of powder feeding and air supply, so that a layer of thin slag with a thickness which is not more than 0.5 mm is formed on the surface of a furnace hearth to improve the effect of forming a weld joint. Multilayer welding can be carried out in a welding process without cleaning slag, so that the welding efficiency is improved.

Description

technical field [0001] The invention relates to a powder for welding, in particular to a roll surfacing powder with a thin layer of molten slag protection specially used for a welding torch with a powder feeding and gas feeding function; it belongs to the field of welding materials. Background technique [0002] During the steel rolling process, the working environment of the rolls is harsh, the rolling temperature of the slab is above 1200°C, the rolls are severely worn, the amount of passing steel is small, the consumption of rolls per ton of steel is large, and the change of rolls is frequent. The roll is an important consumable spare part in the steel rolling process, and the main consumption form of the roll is the continuous wear of the surface. Surface wear not only shortens the service life of rolls, but also directly affects the surface quality and forming of hot-rolled products. The rolling consumption of the roll accounts for about 10% or even more of the rolling...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/362
Inventor 孙俊生李梦实孙逸群
Owner SHANDONG UNIV
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