A vacuum electron beam welding equipment capable of welding under high temperature conditions

Abstract

The present invention is a vacuum electron beam welding equipment that can be welded under high temperature conditions. The equipment includes a vacuum furnace composed of a water-cooled furnace wall (1), a heat shield (2) and a heating body (3). The vacuum furnace The heating temperature reaches 1250°C, and it is characterized in that: an electron gun (4) is installed on the cold area of ​​the outer surface of the water-cooled furnace wall (1), and the electron beam (5) of the electron gun (4) passes through the heat shield (2) The window (6) opened on the top enters the hot zone in the furnace to realize the electron beam welding of the workpiece (7) that has been heated in the furnace; a feed mechanism (8) capable of linear and rotary motions is set at the lower part of the hot zone in the furnace, The motor (9) of the feed mechanism (8) is arranged on the outside of the heat shield (2) and transmits power to the feed mechanism (8) through the opening on the heat shield (2), and the feed mechanism (8) A connecting mechanism (10) is provided at the top of the top to realize the clamping and supporting of the workpiece (7) and to drive the workpiece (7) in the hot zone to perform linear or rotary single-axis motion. The high-quality welding of brittle materials such as intermetallic compounds and metal-matrix composite materials and dissimilar materials of metal and ceramics can be realized by adopting the device of the invention.

Description

technical field [0001] The invention relates to a vacuum electron beam welding equipment which can be welded under high temperature conditions, and belongs to the technical field of welding. Background technique [0002] With the development of aerospace equipment, the performance requirements for high-temperature structural materials are getting higher and higher. High temperature resistant metal materials (such as TiAl, Ni 3 Al and other intermetallic compounds, metal matrix composites, Ti 2 AlNb alloy, etc.) itself and its welding technology with dissimilar materials (ceramics and metals) are one of the key technologies for engineering applications of such materials. However, due to the low room temperature plasticity and poor deformation ability of these materials, when they are connected by fusion welding, the welds are easily cracked and the parts are scrapped, which becomes a difficulty in the engineering application of such materials. At present, the welding metho...

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Problems solved by technology

However, due to the low plasticity and poor deformation ability of this type of material at room temperature, when it is connected by fusion welding process, the weld seam is easy to form cracks and the parts are scrapped, which has become a difficulty in the engineering application of this type of material.

At present, the welding methods for such materials are mainly brazing and solid-phase welding, while fusion welding methods such as argon arc welding, laser welding and electron beam welding cannot avoid the occurrence of welding crack defects and cannot meet the needs of engineering applications.

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