Method for manufacturing dual-phase stainless steel hollow sandwich structure element
A technology of duplex stainless steel and sandwich structure, applied in the field of material processing, can solve the problems of poor superplastic forming/diffusion joining performance of duplex stainless steel
Inactive Publication Date: 2015-04-15
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
[0004] The purpose of the present invention is to provide a method for manufacturing duplex stainless steel hollow sandwich structural parts, which solves the problem of poor superplastic forming / diffusion connection performance of duplex stainless steel
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[0020] 1. Manufacturing of SAF2205 duplex stainless steel three-layer sandwich structure
[0021] The SAF2205 duplex stainless steel superplastic sheet is obtained by the usual preparation method, and three SAF2205 duplex stainless steel superplastic sheets are cut out, the length is 800mm, the width is 600mm, and the thickness is 1.5mm. The cold rolling deformation of two plates is 80%, and the cold rolling deformation of the other plate is 50%. The surface of the superplastic duplex stainless steel plate is cleaned by the usual pickling method. Commonly used yttrium oxide isolating agent is used for partial coating, the cold-rolled plate with 50% deformation is placed between two cold-rolled plates with 80% deformation, and the three-layer plate structure is assembled by welding. Put the assembled three-layer duplex stainless steel superplastic sheet into the mold and put it into the heating device. The mold containing the three-layer duplex stainless steel plate is heated to...
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The invention discloses a method for manufacturing a dual-phase stainless steel hollow sandwich structure element and belongs to the field of the processing of material. The method comprises the steps of: firstly, preparing dual-phase stainless steel super-plastic plates with different cold rolling reductions by a cold rolling method, wherein the range of the cold rolling reduction is 40-90%, and processing a plurality of layers of dual-phase stainless steel super-plastic plates with different cold rolling reductions into the hollow sandwich structure elements according to a common super-plastic forming / diffusing connection method, wherein the cold rolling reductions are different under the same diffusion connection temperature; the structure transformation rule of each dual-phase stainless steel super-plastic plate is different, and the surface chemical activation of the dual-phase stainless steel plate can be improved by utilizing the difference of interface structure change of two layers of dual-phase stainless steel super-plastic plates, therefore, the purpose of improving the super-plastic forming / diffusing connection performance of the dual-phase stainless steel plate is achieved. The method has wide application prospect in the aspect of manufacturing the lightweight hollow sandwich structure element.
Description
Technical field [0001] The invention belongs to the field of material processing, and particularly relates to the manufacture and application of a metal hollow sandwich structure. Background technique [0002] Due to its excellent corrosion resistance, appropriate strength and good toughness, duplex stainless steel has been widely used in the fields of petrochemical industry, paper industry, fertilizer industry, energy and environmental protection industry, medical equipment, sea water environment, building decoration and other fields. Especially in recent years, with the special requirements of materials with chloride stress corrosion resistance in marine development machinery, ships, ships and other fields, duplex stainless steel materials have received extensive attention. [0003] Duplex stainless steel has good superplastic properties under certain conditions, and the superplastic properties of duplex stainless steel are better than traditional superplastic materials such as t...
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IPC IPC(8): B23K20/14B23K20/18B32B3/28
Inventor 李殊霞任学平李玉娇何铎牛闯杨林
Owner UNIV OF SCI & TECH BEIJING