Novel welding technique for hammering and forging high-temperature welding line

Abstract

The invention discloses a novel welding technique for hammering and forging a high-temperature welding line. The novel welding technique for hammering and forging the high-temperature welding line relates to a working table, a stand column, a track cross beam, a servo trolley, elastic cushion blocks, a control cabinet and a pneumatic source. The novel welding technique for hammering and forging the high-temperature welding line is characterized in that an electric welding gun, a gas gun, an heat insulation cover plate and at least one pneumatic impact hammer are installed on the servo trolley and can move in a servo mode on the track cross beam under the control of the control cabinet, and a welding part is fixed on the working table through the elastic cushion blocks. According to the novel welding technique for hammering and forging the high-temperature welding line, the surface of the welding line which is just welded is heated through the gas gun during welding, a weld microstructure in the high-temperature state is hammered and forged contentiously through the at least one pneumatic impact hammer, and finally normalizing treatment is automatically carried out on the hammered and forged weld microstructure after heat insulation is carried out on the hammered and forged weld microstructure in the servo moving process of the heat insulation cover plate. The novel welding technique for hammering and forging the high-temperature welding line has the advantages that the structural compactness of the welding area of a component can be improved, welding stress deformation is reduced, residual stress is relieved, and high-carbon steel and alloy steel can be widely applied to the welding field.

Description

technical field [0001] The invention belongs to the field of new technology of metal welding technology, in particular to a new welding technology of hammer forging high-temperature weld seam. Background technique [0002] As we all know, metal welding technology is widely used in machinery manufacturing, shipbuilding, metallurgy, transportation, chemical industry, electric power and other industries. After metal components are welded, tiny cracks and bubbles will occur on the surface and inside of the weld area, and there will be metallographic The defects of loose tissue density and reduced metal comprehensive performance affect the performance, processing accuracy and dimensional stability of the structure, reduce the qualified rate of the product, and easily lead to damage accidents during the use of the machine. Therefore, for a long time, domestic and foreign scholars have continuously explored the problems of stress deformation, cracks, air bubbles and residual stress...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a new welding process for hammer forging high-temperature welds. This new welding process can overcome the shortcomings of the known weldment to remove residual stress, and can achieve the refinement of metallographic grains in the weld area. Eliminate residual stress, effectively prevent welding cracks and air bubbles, improve the mechanical properties and machining performance of the weld area, and solve the problem that large-scale special-shaped weldments cannot be heat-treated to eliminate residual stress. The present invention can combine heat treatment, ultrasonic The effect of superposition of impact method, vibration aging and vibration welding technology treatment effect, and also increases the metallographic structure density in the weld area, reduces the tendency of welding stress deformation, makes high carbon steel and alloy steel widely used in the field of welding, And it can repair and correct the cracks and stress deformation produced by welded parts

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