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Butt welding method for stainless steel clad steel plates

A composite steel plate and welding method technology, which is applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of heavy welding workload, low welding efficiency, and poor welding quality, so as to improve welding efficiency and welding quality, and improve The effect of weld corrosion resistance

Inactive Publication Date: 2017-01-04
上海月月潮管道科技有限公司
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Problems solved by technology

[0009] The technical problem to be solved in the present invention is to provide a butt welding method for stainless steel clad steel plates in order to overcome the defects of large welding workload, low welding efficiency and poor welding quality in the traditional welding method of stainless steel clad steel plates in the prior art, This welding method can avoid thermal cracks when two stainless steel clad steel plates are butted, and improve the corrosion resistance of the weld seam, with high welding efficiency and good welding quality

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  • Butt welding method for stainless steel clad steel plates

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Embodiment Construction

[0047] A preferred embodiment will be given below, and the present invention will be described more clearly and completely in conjunction with the accompanying drawings.

[0048] In describing the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or positional relationship. Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

[0049] Such as Figure 1-2 As shown, the welding method for the butt joint of stainless steel clad steel plates of the present inventi...

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Abstract

The invention discloses a butt welding method for stainless steel clad steel plates. The butt welding method sequentially includes the following steps that S1, butt-joint portions of two stainless steel clad steel plates to be welded are machined into groove portions through milling by means of an edge milling machine, and oil stains and oxide on the groove portions and to-be-cleaned areas on the two sides of each groove portion are cleaned away; S2, positioned back welding is conducted on transition openings by one pass; S3, a lower groove base layer is welded in a single electrode submerged arc welding mode; S4, an upper groove base layer is welded; S5, a lower groove composite layer is welded; S6, an upper groove composite layer is welded; and S7, the stainless steel clad steel plates to be welded are subjected to solid solution treatment and heated to 1040-1090 DEG C, and finally air-cooling treatment is conducted. By means of the method, thermal cracks generated during butt welding of the two stainless steel clad steel plates can be avoided, corrosion resistance of welds is improved, and welding efficiency and welding quality are improved.

Description

technical field [0001] The invention relates to a welding method for the butt joint of stainless steel clad steel plates. Background technique [0002] Stainless steel clad steel plate is composed of two welding materials, stainless steel and low carbon steel. The thermophysical properties, chemical composition and structure of these two materials are quite different. During welding, the Cr and Ni elements in the composite layer will be partially burned, which will reduce the Cr and Ni content in the weld and affect the composite layer. Corrosion resistance, while the dilution effect of the base weld on the composite layer weld will reduce the chromium-nickel content in the composite layer weld, increase the carbon content of the composite layer weld, and easily lead to martensite in the composite layer weld Organization, thereby reducing the plasticity and toughness of welded joints, and affecting the corrosion resistance of composite layer welds. Moreover, due to the sma...

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Application Information

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IPC IPC(8): B23K9/18B23K9/235B23K9/16
CPCB23K9/18B23K9/16B23K9/235
Inventor 韦再生姜庆蓉刘奎
Owner 上海月月潮管道科技有限公司
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