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Active agent for laser welding of ferrite stainless steel and using method for active agent

An active agent, stainless steel technology, used in laser welding equipment, welding media, welding equipment and other directions, can solve the problems of increasing weld penetration, shallow weld penetration of ferritic stainless steel laser welding, low welding efficiency, etc. Absorption rate, ideal coating effect, and the effect of improving welding efficiency

Inactive Publication Date: 2012-10-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention aims to solve the technical problems of shallow ferritic stainless steel laser welding seam penetration and low welding efficiency. It provides an activator for ferritic stainless steel laser welding and its application method, which can not only significantly increase the welding seam melting Deep, can also improve the weld structure

Method used

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  • Active agent for laser welding of ferrite stainless steel and using method for active agent
  • Active agent for laser welding of ferrite stainless steel and using method for active agent
  • Active agent for laser welding of ferrite stainless steel and using method for active agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Weigh 5 parts of ZrO in parts by weight with an electronic balance 2 , 1 part of CaO, 2.8 parts of MgO and 1.2 parts of CaCO 3 , mixed, and fully ground to make the active agent. Take an appropriate amount of the active agent of the mixed components in a clean beaker, add 0.5 part of its weight in absolute ethanol to make a paste, and then use a flat brush to evenly coat the surface of the steel plate to be welded, and the thickness of the coating is just enough to cover the metal surface Gloss is preferred. Before activator coating, the steel plate to be welded needs to be polished with 240# metallographic sandpaper and cleaned with absolute ethanol to remove surface oil. After the coating layer is dry, laser welding is carried out using the welding specifications shown in Table 1 below.

[0045] Table 1 Specifications for active laser welding

[0046]

Embodiment 2

[0048] Weigh 5.8 parts of ZrO in parts by weight with an electronic balance 2 , 1.5 parts of CaO, 1.2 parts of MgO and 1.6 parts of CaCO 3 , mixed, and fully ground to make the active agent. Take an appropriate amount of mixed active agent in a clean beaker, add 0.3 part of its weight in absolute ethanol to make a paste, and then use a flat brush to evenly coat the surface of the steel plate to be welded, and the thickness of the coating is just enough to cover the metal surface Gloss is preferred. Before activator coating, the steel plate to be welded needs to be polished with 240# metallographic sandpaper and cleaned with absolute ethanol to remove surface oil. After the coating layer is dry, laser welding is carried out using the welding specifications shown in Table 1 below.

Embodiment 3

[0050] Weigh 7 parts of ZrO in parts by weight with an electronic balance 2 , 0.9 parts of CaO, 0.4 parts of MgO and 1.7 parts of CaCO 3 , mixed, and fully ground to make the active agent. Take an appropriate amount of mixed active agent in a clean beaker, add 0.6 parts of acetone equivalent to its weight to make a paste, and then use a flat brush to evenly coat the surface of the steel plate to be welded. The thickness of the coating is just enough to cover the gloss of the metal surface. should. Before activator coating, the steel plate to be welded needs to be polished with 240# metallographic sandpaper and cleaned with absolute ethanol to remove surface oil. After the coating layer is dry, laser welding is carried out using the welding specifications shown in Table 1 below.

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Abstract

The invention discloses an active agent for the laser welding of ferrite stainless steel and a using method for the active agent. The method comprises the following steps of: respectively weighing and mixing 3 to 7 weight parts of ZrO2, 0.9 to 1.5 weight parts of CaO, 1 to 3 weight parts of MgO and 1 to 3 weight parts of carbonate, and fully grinding a mixture into the active agent; adding the obtained active agent into a solvent according to the weight ratio of 1:(0.3-0.8), and preparing paste; grinding the surface of a workpiece to be welded, and washing the workpiece by using absolute ethyl alcohol to remove oil stains from the surface; coating the paste on the surface of the pretreated workpiece to be welded; and after a coating is fully dried, performing the laser welding. Tests show that a ferrite stainless steel plate can be welded under lower power by the active agent under the conditions of the same welding parameters; the weld penetration can be remarkably improved; and a weld microstructure can be refined, and the number of isometric crystals of a weld zone can be increased. When the active agent is used for the laser welding, the using method is easy and convenient to operate and low in cost, and the welding efficiency can be greatly improved.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to an active agent used for welding and its application method. Background technique [0002] Ferritic stainless steel (FSS) is a stainless steel with a chromium content of 11%-30%. Because it does not contain nickel or contains a small amount of nickel, it has obvious economic advantages compared with the widely used austenitic stainless steel in cost, and this type Steel has a large thermal conductivity, a small thermal expansion coefficient, and has excellent oxidation resistance and chloride stress corrosion resistance. At present, many iron and steel enterprises are committed to the development and promotion of ferritic stainless steel, which has broad application prospects in the fields of architectural decoration, household appliances, kitchen utensils and tableware, and vehicle parts. [0003] During the use of stainless steel, welding is often required, and the quality of...

Claims

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Application Information

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IPC IPC(8): B23K35/362B23K26/42B23K26/20B23K26/24B23K26/60
Inventor 王勇慧胡绳荪申俊琦张延龙宋枭
Owner TIANJIN UNIV
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