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Electro-beam welding method of niobium alloy and titanium alloy thick plate

A technology of electron beam welding and niobium alloy, which is applied in the direction of electron beam welding equipment, welding equipment, welding equipment, etc., can solve the problems of plate warping and deformation, and achieve the effect of solving warping deformation, reducing weight and good use effect

Inactive Publication Date: 2012-08-01
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an electron beam welding method for thick plates of niobium alloy and titanium alloy in view of the deficiencies in the above-mentioned prior art, which has simple process steps, easy operation, high weld quality and straight welded plates Good precision, can solve the problem of large warping deformation of the plate in the welding of thick plates

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  • Electro-beam welding method of niobium alloy and titanium alloy thick plate
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  • Electro-beam welding method of niobium alloy and titanium alloy thick plate

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Embodiment approach

[0034] The process steps of the electron beam welding method for niobium alloy and titanium alloy thick plates described in this embodiment are substantially the same as those in the first preferred embodiment. However, the Nb521 alloy with a thickness of 7.4 mm and a length of 300 mm was butt-welded with a TC4 alloy. Similarly, first use the same method to process the welding surfaces of the two weldments, and finally process the welding surfaces of the two weldments into a smooth surface with a roughness Ra≤1.6μm and perpendicular to the adjacent surfaces of the plates; after that, Prepare acid solution for pickling, the difference is that the acid solution for pickling Nb521 niobium alloy thick plate is made of HF, HNO 3 and H 2 O is mixed and prepared at a volume ratio of 1:5:10; and the acid solution for pickling TC4 titanium alloy thick plates is composed of HF, HNO 3 and H 2 O is prepared by mixing with a volume ratio of 1:5:10. The pickling reaction time is 10 minu...

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Abstract

The invention discloses an electron-beam welding method for welding niobium alloy and titanium alloy thick plates, which comprises steps of: welding surface processing: the welding surfaces of two welding pieces which need welding are processed into smooth surfaces with the roughness Ra less than or equal to 1.6 Mum and the surface being vertical to each adjacent surface of plate material; washing with acid: HF, HNO3 and H2O or HF, H2SO4, HNO3 and H2O are used for preparing an acid solution in a container resisting acid corrosion, and the two welding pieces are respectively put into the acid solution for being washed at normal temperature; welding: a middle or high voltage vacuum electron-beam welding machine is used for welding one face of the each of the two welding pieces, and the depth of a welding line is one second to three fourths of the thickness of the plate material; after the concreting of the welding line and under the same welding condition, the other faces of the two welding pieces are welded, and the depth of the welding line is one fourth to three fourths of the thickness of the plate material. The process of the method has the advantages of simple steps, convenient operation, high welding quality and good straightness of the welded plate and solving the problem of great warp and deforming of the plate material existing in the welding of the thick plate materials.

Description

technical field [0001] The invention relates to the technical field of aerospace industry, in particular to an electron beam welding method for thick plates of niobium alloy and titanium alloy. Background technique [0002] Nowadays, with the development of aerospace and industrial technology, it is required to continuously increase the inlet temperature of the aircraft and to reduce the weight of the aircraft. Therefore, the pure use of niobium alloy or titanium alloy cannot meet the requirements. Niobium alloys (C-103, Nb521) have a high service temperature (≥1400°C), but have a large specificity (≥8.8g / cm 3 ) and the price is high; titanium alloys (TC4, Ti533115, 7715D) have a small specific gravity (about 4.5g / cm 3 ), low price, but low operating temperature (≤650°C). If the two are used in combination, a better use effect can be obtained, that is, the combined use of niobium alloys can withstand high temperatures in high temperature regions and titanium alloys can re...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K15/06C23G1/10B23K37/04B23K103/18
Inventor 郑欣李中奎王东辉白润夏明星张军良蔡小梅张廷杰付洁杨雄毛
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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