A Vacuum Electron Beam Welding Method for Extra-thick Slabs
A technology of vacuum electron beam and extra-thick slab, applied in electron beam welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of reducing the degree of welding deformation of welded joints, failure and cracking of welded joints, etc.
Active Publication Date: 2021-08-20
ANGANG STEEL CO LTD
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[0009] The invention provides a vacuum electron beam welding method for an extra-thick slab. The segmental welding method is adopted for the ultra-long weld seam of the extra-thick slab, which can improve the joint stress concentration of the extra-thick slab at the head and tail. Cause the problem of failure and cracking of welded joints, and reduce the degree of welding deformation of welded joints
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[0022] A vacuum electron beam welding method for an extra-thick slab according to the present invention, the thickness of the extra-thick slab is ≥ 400mm; the length of the single-pass butt weld is ≥ 2m; the vacuum electron beam welding adopts a segmented welding method, that is, The single-run butt weld is divided into n sections on average, and n≥5, and the length of each butt weld is ≤200mm; the odd-numbered butt welds are welded first, and then the even-numbered butt welds are welded.
[0023] A vacuum electron beam welding method for extra-thick slabs. Before the segmental welding, the following steps are performed:
[0024] 1) Clean the surface of the joint to be welded of the extra-thick slab, and then assemble it;
[0025] 2) Fix the two ends of the butt joint of the extra-thick slab by spot welding, and then send it into the vacuum chamber;
[0026] 3) When the vacuum degree in the vacuum chamber reaches 4.5×10 -2 When the Pa is below, the vacuum electron beam weldi...
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Abstract
The invention relates to a vacuum electron beam welding method for an extra-thick slab. The thickness of the extra-thick slab is ≥400mm; the length of a single butt weld is ≥2m; Each butt weld is divided into n sections on average, and n≥5, and the length of each butt weld is ≤200mm; the odd-numbered butt welds are welded first, and then the even-numbered butt welds are welded. The invention adopts segmental welding method for the ultra-long weld seam of extra-thick slab, which can improve the problem that the stress of the extra-thick slab joint is concentrated at the head and tail positions, which easily causes the failure and cracking of the welded joint, and reduces the welding time of the welded joint. degree of deformation.
Description
technical field [0001] The invention relates to the technical field of fusion welding of the same material, in particular to a vacuum electron beam welding method for extra-thick slabs. Background technique [0002] Since the birth of electron beam welding technology in the 1950s, with its high power density, small welding heat input, small deformation of parts, small residual stress after welding, large weld depth-to-width ratio, no oxidation of welded joints, and good weld quality And other characteristics, widely used in industrial fields such as aviation, aerospace and atomic energy. In the aviation manufacturing industry, due to the application of electron beam welding technology, the manufacturing level of aircraft engines has been greatly improved, and many weight reduction designs and welding of different materials in the engine have become a reality, improving the overall performance of the engine. The manufacture of parts that are difficult to process provides a p...
Claims
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IPC IPC(8): B23K15/00
CPCB23K15/00B23K15/0006
Inventor 蒋健博金百刚付魁军刘文飞刘芳芳傅博韩严法胡奉雅王佳骥及玉梅
Owner ANGANG STEEL CO LTD