Seamless titanium welded pipe and manufacturing method thereof

Abstract

The invention discloses a seamless titanium welded pipe with a small caliber and a thin wall, which is characterized by being composed of a mother pipe (2) through at least one path of cold rolling, hole shrinkage and wall reduction, and heat treatment, wherein the mother pipe (2) is a straight welded titanium pipe; original welding lines (1) on the surface of the prepared seamless titanium welded pipe (3) are invisible, the wall thickness and the outer diameter of the seamless titanium welded pipe are uniform; the original welding lines (1) are arranged in a length direction and a circumferential direction; the organization and the performance of the original welding lines are the same as those of the mother pipe (2). A manufacturing method comprises the following steps of selecting and treating the mother pipe, and carrying out the cold rolling, the hole shrinkage and the wall reduction, and the heat treatment on the mother pipe. The seamless titanium welded pipe manufactured by the invention has the advantages that: the wall thickness and the outer diameter of the seamless titanium welded pipe are very uniform, the size precision is better than that of a seamless pipe and a common welded pipe, a process route for preparing a thin-wall tubular material by directly utilizing a thicker raw material coiled stock is realized, and the production cost is greatly reduced.

Description

technical field [0001] The invention relates to a titanium welded pipe, in particular to a seamless titanium welded pipe and a production method thereof, in particular to a small-caliber thin-wall seamless titanium welded pipe and a production method thereof. Background technique [0002] Titanium tubes are divided into seamless tubes and welded tubes. Due to the low yield of seamless pipes, about 50%, and the high cost, vigorously developing thin-walled welded pipes has become a trend in pipe production today. The titanium strips required for the production of thin-walled welded pipes, especially the ultra-thin-walled titanium strips, are very expensive. At the same time, due to the particularity of the production process, there are certain differences between the weld zone, the heat-affected zone and the base metal, including metallographic microstructure, corrosion resistance, etc., which limit its application and are only used for low pressure or low pressure requiremen...

AI Technical Summary

Problems solved by technology

The titanium strips required for the production of thin-walled welded pipes, especially the ultra-thin-walled titanium strips, are very expensive.

At the same time, due to the particularity of the production process, there are certain differences between the weld zone, the heat-affected zone and the base metal, including metallographic microstructure, corrosion resistance, etc., which limit its application, and are only used for low pressure or low pressure requirements. occasion

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