Method for manufacturing high-accuracy pure titanium rod

Abstract

The invention discloses a method for manufacturing a high-accuracy pure titanium rod. The method includes the steps of blank preparation, blanking, cogging-down forging, deformation processing, annealing, thermal straightening, lathe machining, piece finishing and finished product packaging inspection. During lathe machining of a rod, diameter of the rod can be directly machined to be in the size of a finished product rod, and waste chips generated during turning of the rod can be recycled, so that economic value is increased; heating temperature is low during finishing, so that influence on metallographic structure of the rod is small, service life of the rod is prolonged, and mechanical strength of the rod is improved; due to low heating temperature, oxidation scale on the surface of the rod is extremely thin, total indentation of the rod is small during straightening, grinding is not needed after straightening, and requirements, on coarseness of 1.6 micrometers and size tolerance, of the finished product rod can be met by directly polishing for two times.

Description

technical field

[0001] The invention relates to the field of material processing, in particular to a method for preparing high-precision pure titanium rods. technical background

[0002] The existing method of preparing medical titanium alloy rods generally adopts the stress-relief straightening method during finishing treatment. When turning before finishing treatment, the bar needs to leave a minimum margin of 30-40 wires, and this method The temperature of the bar is high when heating. Generally, the pure titanium bar needs to be heated to 550-600°C, and the titanium alloy bar needs to be heated to 650-700°C. The whole becomes soft, and the overall indentation of the bar during straightening is deep, and the minimum value will reach 10 wires. These unfavorable factors cannot be eliminated by polishing alone, so these unfavorable factors must be eliminated by grinding, and the roughness of grinding can reach 6.4 um, it must be polished twice to meet the requirements of th...