Cold working pipe-making technique for aero alloy tube

Abstract

The invention discloses a cold-working tube manufacture process of an aerometal tube, which includes a blank tube manufacture process, a heat treatment process and a straightening procedure, wherein the blank tube manufacture process includes piercing, end flattening, oiling and multi-time cold rolling processes. The piercing process adopts a processing manner of machine tool drilling. The manufacture process has no need for heating the tube blank before drilling, thereby guaranteeing the physical and the chemical properties of the tube blank, avoiding the processing defect, increasing the qualification rate of the blank tube to 100%, ensuring the quality of the blank tube, simplifying the technological process and saving the production cost. The manufacture process has no need for heating the tube blank, therefore, the acid cleaning procedure is eliminated so that no waste generates except the solid one, and the generated solid waste can be recovered, thereby saving resource and cost and causing no environment pollution.

Description

Cold Working Process of Aeronautical Alloy Tubes technical field The invention relates to an aviation alloy pipe-making process, in particular to a cold-working pipe-making process for an aviation alloy pipe. Background technique Aviation tubes (mainly including high-temperature alloy aviation tubes and aviation stainless steel tubes) are special manufacturing materials for aviation and aerospace engines, and are mainly used in cutting-edge fields such as aerospace, aviation and nuclear energy. With the vigorous development of the defense industry, especially in cutting-edge fields such as aerospace, aviation and nuclear energy, the use of aviation tubes is increasing. The manufacturing process of cold-rolled seamless steel pipe is: tube blank → heating → hot piercing → two (three) roll cross rolling, continuous rolling or top drawing → heat treatment → straightening → multi-pass cold drawing (cold rolling) → heat treatment → straightening Straight→detection→mark→storage...

AI Technical Summary

Problems solved by technology

Both the manufacturing process of hot-rolled seamless steel pipe and the manufacturing process of cold-rolled seamless steel pipe must go through the process of heating and piercing. The heating must reach about 1100-1200 degrees Celsius, which has a great impact on the physical and chemical properties of the metal. It is difficult to process and prone to defects (cracks, folds, etc.), resulting in a low pass rate from the rod to the blank tube, and some defects cannot be completely removed, resulting in a very low yield of the final finished tube, sometimes even only about 25%. ; And heating will waste energy and cause pollution to the environment

At the same time, due to the heating process, the oxide film on the surface of the pipe needs to be removed by pickling, which not only complicates the process, but also has an adverse impact on the environment.