Thin-layer slag protecting medicinal powder for welding high strength steel

A technology of high-strength steel and powder, applied in welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problem of affecting the welding production process and weld seam quality, the wire feeding is not as smooth as solid welding wire, and the production cost of flux-cored welding wire Advanced problems, to achieve the effect of easy promotion, improved welding production efficiency and low cost

Inactive Publication Date: 2012-07-18
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, flux-cored wire has high production costs, wire feeding is not as smooth as solid wire during welding, and arc alignment is poor. Especially in automatic welding or robotic welding, poor wire feeding and poor arc alignment directly affect the welding production process and weld quality.
[0005] The application of the torch with dual functions of powder feeding and gas feeding has opened up a new process method for high-strength steel welding, and laid a foundation for reducing the cost of welding materials, reducing welding spatter, improving arc stability, and improving weld formation. However, it is dedicated to There are few reports on high-strength steel welding powder with powder and gas function welding torch

Method used

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  • Thin-layer slag protecting medicinal powder for welding high strength steel
  • Thin-layer slag protecting medicinal powder for welding high strength steel
  • Thin-layer slag protecting medicinal powder for welding high strength steel

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 thin-layer slag protecting medicinal powder for welding high strength steel. The medicinal powder is prepared by uniformly mixing an alloy and a slag forming and arc stabilizing agent. The content of the alloy accounts is 88-92wt% (weight percent), and the content of the slag forming and arc stabilizing agent accounts is 12-8wt%. The alloy comprises the following elements by weight percent: 0.06-0.10% of C, 1.0-5.0% of Si, 1.2-3.4% of Mn, 0.72-1.4% of Mo, 0.5-1.4% of Cr, 1.4-5.2%Ni, 0.30-0.70% of Ti and the balance of Fe; the slag forming and arc stabilizing agent is prepared by mixing the following materials in parts by weight: 15-30 parts of rutile, 8-25 parts of potash potassium feldspar, 1-5 parts of magnesia, 2-10 parts potassium titanate, 2-8 parts of sodium fluoride, 0-8 parts of sodium fluosilicate, 5-12 parts of barium fluoride and 0-4 parts of cerium oxide rare earth. The medicinal powder can be used together with a welding torch with the powder and gas supplying double function, thereby overcoming the defects that the high-strength steel welding wire is hard to obtain from a wire rod, the welding wire is produced by multiple thermal treatment, and the cost is high.

Description

technical field [0001] The invention relates to a medicinal powder for welding, in particular to a high-strength steel welding medicinal powder with a thin layer of 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] With the development of welded structures in the direction of large-scale, high-pressure, high-temperature and other high-parameterization, the application range of high-strength steel is expanding, and the amount is gradually increasing. It has been widely used in construction machinery, bridges, pressure vessels, mining machinery, In industries such as construction, the corresponding demand for high-strength steel welding materials has also increased significantly. High-strength steel welding materials include welding rods, solid welding wires, and flux-cored welding wires. Because solid welding wires and flux-cored welding wires are suita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362
Inventor 孙俊生孙逸群焦恩理
Owner SHANDONG UNIV
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