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: 2012-10-24
UNIV OF SCI & TECH BEIJING
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[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. Manufacture of SAF2205 duplex stainless steel three-layer sandwich structure
[0021] The SAF2205 duplex stainless steel superplastic plate is obtained by the usual preparation method. Three pieces of SAF2205 duplex stainless steel superplastic plate are cut, with a length of 800mm, a width of 600mm, and a thickness of 1.5mm. Two of the plates have a cold rolling deformation of 80%, and the other plate has a cold rolling deformation of 50%. The surface of the superplastic duplex stainless steel plate is cleaned by the usual pickling method. The commonly used yttrium oxide release agent is used for partial coating, and the plate with a cold-rolled deformation of 50% is placed in the middle of two plates with a cold-rolled deformation of 80%, and welded and assembled to form a three-layer plate structure. Put the assembled three-layer duplex stainless steel superplastic sheet into a mold and put it into a heating device. Heat the mold loaded with the three-layer dupl...
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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, in particular to the manufacture and application of metal hollow sandwich structures. Background technique [0002] Due to its excellent corrosion resistance, appropriate strength and good toughness, duplex stainless steel is widely used in petrochemical, paper industry, fertilizer industry, energy and environmental protection industry, medical equipment, seawater environment, architectural decoration and other fields. Especially in recent years, with the special requirements for chloride stress corrosion resistance materials in the fields of marine development machinery, ships, and ships, duplex stainless steel materials have been widely valued. [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 titanium alloys and aluminum alloys. Therefo...
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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