Flash welding shaping method for nickel-based high-temperature alloy thin-wall ring

Abstract

The invention discloses a flash welding shaping method for a nickel-based high-temperature alloy thin-wall ring. The method comprises the following steps of: placing a D-shaped ring blank into a welding machine, closing the opening of the D-shaped ring blank, applying a voltage of 7-18V to the space between the two poles of the welding machine, heating and melting the left and right end faces of the opening of the ring blank through the heating of flashing current of which the current density is 30-200 A / mm<2> to form a lintel, and exploding to form flash; under the condition that flash burning loss speed of the ring blank is 2.0-4.0mm / s, driving the right end face of the ring blank to feed at an increasing speed to the left end face at the initial speed of 1.0-2.0mm / s and the acceleration of 0.4-0.8mm / s<2> to ensure that the distance between the left and right end faces is less than or equal to 8 millimeters; and after flashing is completed, driving the right side straight edge of the ring blank to move towards the left side straight edge of the ring blank at a high speed, colliding the left and right end faces under the action of an upsetting force of 13-18KN to form a flash welding thin-wall ring, and maintaining pressure for 15-25 seconds under the action of the upsetting force. According to the method, a flashing process can be performed continuously and stably, so that the welding seam quality is improved.

Description

technical field [0001] The invention relates to a welding method, in particular to a flash welding forming method of a nickel-base superalloy thin-walled ring. Background technique [0002] With the increasing demand for rings in industries such as aviation, aerospace, ships, gas turbines, wind energy, nuclear energy, and bearings, rings formed by traditional rolling methods not only waste a lot of materials due to large machining allowances and low material utilization , but also keeps the cost of ring parts high. The ring parts produced by the flash welding process have less machining allowance, high material utilization rate, and greatly reduce the cost, which is conducive to the development of ring forming technology in the direction of precision forming technology. [0003] The Chinese invention patent specification CN 1233548A published on November 3, 1999 discloses a flash welding process for aluminum alloy wheels of automobiles and motorcycles. The technological pro...

AI Technical Summary

Problems solved by technology

However, in the process of welding thin-walled rings such as nickel-based superalloy thin-walled rings by flash welding, if the distance between the two ends of the ring blank weld is not well controlled, the flash will stop, which will affect the continuous welding and welding. Seam quality, in severe cases, it will cause scrapping of weldments

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