Fusing agent used for stainless A-TIG welding and using method thereof

A penetrating agent, stainless steel technology, applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve the problem of not considering the influence of welding deformation on the back of the weld, to achieve small deformation, reduce heat input, and reduce sensitivity Effect

Inactive Publication Date: 2009-10-14
北京钢研新冶工程技术中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This penetrating agent can only be used for a plate thickness of about 6mm, and does not consider the backside formation of the weld and its influence on welding deformation

Method used

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  • Fusing agent used for stainless A-TIG welding and using method thereof
  • Fusing agent used for stainless A-TIG welding and using method thereof
  • Fusing agent used for stainless A-TIG welding and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The composition of the penetrating agent of the first embodiment of the present invention is by weight percentage: Al 2 o 3 5%, FeO 6%, Si 37%, Cr 2 o 3 15%, NaF7%, MnO 2 9%, V 2 o 5 21%, the welding specifications are shown in Table 1.

[0039] Table 1 welding specification

[0040] Plate thickness mm

[0041] Put a certain amount of penetrating agent in the container, add an appropriate amount of acetone to make it into a paste. Brush the pasty penetration agent on the surface of the workpiece to be welded with a flat brush. The thickness of the brush should be able to cover the original color of the base metal. The width of the brush is about 20mm, and the consumption of the penetration agent per meter of weld bead is about 0.4g. After the acetone volatilizes, it can be welded. Its technical effect is as follows.

[0042] 1. Shape of molten pool

[0043] like Figure 1a As shown, no penetrating agent is used, butt joint of 10mm thick plate req...

Embodiment 2

[0057] The penetrating agent in the second embodiment of the present invention is proportioned by weight percentage: Al 2 o 3 6%, FeO7%, Si30%, Cr 2 o 3 17%, NaF7%, MnO 2 11%, V 2 o 5 twenty two%. The welding specifications are shown in Table 1. After using the penetration agent, the technical effect is as follows.

[0058] 1. Shape of molten pool

[0059] like Figure 4a As shown, the penetration depth without the use of penetration agent is only 3mm. like Figure 4b As shown, the penetration depth of the penetrating agent is 10mm. The melt width with penetrating agent is significantly smaller than that without penetrating agent, the shape of the molten pool is a typical finger-shaped molten pool, and the reinforcement at the back of the weld is less than 2mm.

[0060] 2. Appearance of weld seam

[0061] Figure 5a This is the topography of the weld seam. The weld seam is obviously narrowed in the area where the penetrating agent is applied, and the surface i...

Embodiment 3

[0074] The penetrating agent of the third embodiment of the present invention is proportioned by weight percentage: Al 2 o 3 5%, FeO5%, Si 40%, Cr 2 o 3 12%, NaF 8%, MnO 2 8%, V 2 o 5 twenty two%. The welding specifications are shown in Table 1. After using the penetration agent, its technical effects are as follows.

[0075] 1. Shape of molten pool

[0076] like Figure 6a As shown, the penetration depth without the use of penetration agent is only 3mm. like Figure 6b As shown, the penetration depth of the penetrating agent is 10mm. The melt width with penetrating agent is significantly smaller than that without penetrating agent, the shape of the molten pool is a typical finger-shaped molten pool, and the reinforcement on the back of the weld is less than 2mm.

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Abstract

The invention relates to a fusing agent used for stainless A-TIG welding and a using method thereof. The fusing agent comprises a powder part and a liquid carrier; the powder part comprises the following components by weight percent (wt%): 5 to 8 of Al2O3, 5 to 8 of FeO, 30 to 43 of Si, 12 to 20 of Cr2O3, 7 to 8 of NaF, 8 to 11 of MnO2 and 20 to 30 of V2O5. When in use, the powder part is added into the liquid carrier so as to become pasty; the pasty fusing agent is coated on the surface of the workpiece to be welded; the width of the coating is 15 to 30mm; and welding is conducted after the liquid carrier is volatilized. Under the condition of same welding specification, the fusing agent can leads the weld penetration to be increased by three times; the fusing agent has simple use, can effectively reduce welding deformation, reduce the sensitivity of weld penetration to the fluctuation of trace elements of parent materials and has no influence to welding seam structures and mechanical performance of welding seams.

Description

technical field [0001] The invention belongs to the field of welding, in particular to a penetrating agent for A-TIG welding of stainless steel and an application method thereof. Background technique [0002] Tungsten argon arc welding (Tungsten Inert Gas-TIG welding) can be used for the connection of almost all metals, but it also has the disadvantages of shallow welding penetration and low production efficiency. Single-pass welding of stainless steel has a penetration depth of only about 3mm. For the butt joint of thick plates above 3mm, beveling, wire filling, and multi-pass welding are required to complete, and the welding deformation is also large. For a steel plate with a thickness of 10mm, it usually takes 5-6 welds to complete. Another problem with TIG welding stainless steel is that the welding penetration is not easy to control, and the penetration fluctuates with the fluctuation of trace elements (O, S) in the base metal. Under the same welding specification con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362B23K9/167B23K9/23B23K9/095
Inventor 黄容生张岩贺智勇赵方梁浩周亮杨凯森吴桐
Owner 北京钢研新冶工程技术中心有限公司
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