Processes for Improving Processing Quality of Ta18 Small Diameter Titanium Alloy Cold Rolled Tube

Abstract

The invention discloses a process method for improving the processing quality of a TA18 small-opening-diameter titanium alloy cold rolling pipe, and belongs to the technical field of sectional material cold rolling processes. According to the process method for improving the processing quality of the TA18 small-opening-diameter titanium alloy cold rolling pipe, the titanium alloy pipe with the even wall thickness and smooth surface can be obtained in a cold rolling mode. The process method comprises working procedures of preparation of a pipe blank, selecting and adjusting of deformation rolling tools, preparation of a lubrication coolant, and two or more passes of diameter decreasing, wall reducing and wall thickness difference adjusting cold rolling to roll the TA18 small-opening-diameter titanium alloy cold rolling pipe, wherein when the number of the total rolling passes is more than two, after two passes of rolling are completed each time, the working procedures of preparation ofthe pipe blank, adjusting of the deformation rolling tools and preparation of the lubrication coolant need to be carried out again, and then the corresponding passes of diameter decreasing, wall reducing and wall thickness difference adjusting rolling is carried out till a finished TA18 small-opening-diameter titanium alloy cold rolling pipe product with the opening diameter and wall thickness meeting the requirements is rolled.

Description

technical field [0001] The invention relates to a process method, in particular to a process method for improving the processing quality of TA18 small-diameter titanium alloy cold-rolled pipes, and belongs to the technical field of profile cold-rolling processes. Background technique [0002] TA18 titanium alloy belongs to α+β two-phase titanium alloy, in which the content of α-stable elements is 3%, and the content of β-stable elements is 2.5%. This titanium alloy has the disadvantages of rolling process such as large deformation resistance, strong work hardening, easy cracking due to cold deformation, and poor surface finish. The TA18 tube billet obtained by hot extrusion often has the characteristics of rough surface finish, serious wall thickness eccentricity, and many defects on the inner and outer surfaces of the billet. After subsequent cold rolling, it cannot meet the shape, size, and surface quality requirements of TA18 titanium alloy pipe. Contents of the inventi...

AI Technical Summary

Problems solved by technology

This titanium alloy has the disadvantages of rolling process such as large deformation resistance, strong work hardening, easy cracking due to cold deformation, and poor surface finish.

The TA18 tube billet obtained by hot extrusion often has the characteristics of rough surface finish, serious wall thickness eccentricity, and many defects on the inner and outer surfaces of the billet. After subsequent cold rolling, it cannot meet the shape, size, and surface quality requirements of TA18 titanium alloy pipe.