Swelling pressure forming and manufacturing method of zirconium corrugated pipe

Abstract

The invention discloses a swelling pressure forming and manufacturing method of a zirconium corrugated pipe. In a process of manufacturing the zirconium corrugated pipe, two times of thermal treatment and temperature swelling pressure formation are adopted, wherein a temperature swelling pressure formation process adopts heating swelling pressure formation. Before and after the zirconium corrugated pipe is subjected to swelling pressure formation, a stress-relief heat treatment procedure is reasonably increased, crests and troughs of the formed zirconium corrugated pipe are in smooth transition without corner angles, and materials uniformly extend and are better in plasticity. A special swelling pressure formation device and a heating device in a swelling pressure formation process are designed, and a proper swelling process method is selected, thus the formed zirconium corrugated pipe is more accurate in size and higher in yield. The swelling formation quality of a zirconium corrugated pipe blank is optimized through reasonably selecting a welding method and a welding parameter and carrying out cleaning treatment before welding, thus the problem of sensitivity of a zirconium material to impurities is effectively reduced.

Description

technical field [0001] The invention relates to the manufacture of zirconium corrugated pipes, in particular to the manufacturing process of zirconium corrugated pipes by expansion and compression. Background technique [0002] The thermal compensation technology of equipment and pipelines is realized by various compensators, and most of them use bellows expansion joints. The bellows expansion joint is composed of bellows and other structural parts, among which the bellows are flexible parts, and the thermal compensation performance of the expansion joint is basically determined by the bellows. Bellows have been widely used in various industries. Due to different working conditions, the requirements for the structure and performance of the compensator are also different. With the rapid development of industry, new requirements are constantly put forward for the material properties of corrugated compensators. Non-ferrous metal materials such as zirconium and titanium have t...

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Problems solved by technology

Its manufacturing process has outstanding advantages, but there are still certain problems in the bellows forming process. The crests and troughs will have certain edges and corners, and the material will be unevenly stressed, resulting in uneven material extension; the welding groove and its sides are not cleaned properly. The quality of the expansion of the bellows is not high

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