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Method for welding ferrite-austenite double-phase stainless steel

A technology of duplex stainless steel and welding method, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve problems such as poor welding effect, and achieve the effect of improving welding quality, good mechanical properties and corrosion resistance.

Inactive Publication Date: 2012-06-20
CRRC SIFANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: provide a welding method of ferrite-austenite duplex stainless steel, solve the defect of poor welding effect of ferrite-austenite duplex stainless steel in the prior art, realize Welding method of ferritic-austenitic duplex stainless steel to improve welding quality of ferritic-austenitic duplex stainless steel

Method used

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Embodiment Construction

[0014] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all Example. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0015] The welding method of ferrite-austenite duplex stainless steel in this embodiment includes:

[0016] Step 1. The blank is cut by non-flame cutting. Specifically, in step 1, a non-flame cutting method is used to cut the blank, for example, laser cutting or water cutting can be used. Since the blank is not subjected to flame roasting during the cutting process, it can effectively avoid a large amount of carburization at the cut...

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Abstract

The invention provides a method for welding ferrite-austenite double-phase stainless steel. The method comprises the following steps of: 1, cutting a blank by adopting a non-flame cutting mode; 2, assembling the cut blanks, and cleaning weld joints to clear away foreign matters which are retained on the weld joints, and can produce carbon; 3, welding the weld joints by adopting a metal active gas arc welding method; and 4, heating a welded deformed region by adopting a quick moving point heating method, then adjusting the heated welded deformed region, and quickly cooling the adjusted heated welded deformed region by water or compressed air. According to the method for welding the ferrite-austenite double-phase stainless steel, the welding quality of the ferrite-austenite double-phase stainless steel is improved.

Description

technical field [0001] The invention relates to the field of welding, in particular to a welding method for ferrite-austenite duplex stainless steel. Background technique [0002] Ferritic-austenitic duplex stainless steel has good comprehensive mechanical properties, excellent resistance to stress corrosion and pitting corrosion, which makes ferritic-austenitic duplex stainless steel have excellent welding performance, and is widely used in trains in the chassis. From the perspective of microstructure, ferrite-austenitic duplex stainless steel contains 40%-60% ferrite, and the rest is austenite with corresponding content. The composition of this proportion is to ensure the ferrite-austenite Austenitic duplex stainless steel has excellent corrosion resistance and key mechanical properties. In the prior art, when ferrite-austenite duplex stainless steel is welded, the corrosion resistance and mechanical properties of the welded joints are prone to decline, and the welding ...

Claims

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Application Information

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IPC IPC(8): B23K9/173B23K9/235
Inventor 张泽代夫华但楚臣李东光
Owner CRRC SIFANG CO LTD