Cold wire drawing method of GR5 titanium alloy

Abstract

The invention discloses a cold wire drawing method of GR5 titanium alloy, and relates to a processing method of a titanium alloy wire. The method comprises the following steps of: selecting a GR5 marked titanium alloy wire rod which is good in surface and stable in chemical composition and has no defect in the inner side of the wire rod, annealing the surface coating, then carrying out 15-20% of deformation every time by a 550 wire drawing machine, carrying out acid and alkali cleaning on the defects generated in a drawing process to show surface defects, then removing the surface defects, forming hardening to a crystal grain structure through cold drawing and crushing, carrying out thermal insulation and heat treatment for 2 hours in a well furnace at 750 DEG C so as to obtain an equiaxed structure organized by the crystal grain, and carrying out at least three deformations so as to obtain titanium alloy wire product of final size. An obvious work hardening effect happens after the titanium alloy cold drawing technology is disclosed by the invention; and the plasticity recovery of the annealed blank does not influence the next cold drawing technology, so that the cold drawing state is obviously superior to a hot drawing state.

Description

【Technical field】 [0001] The invention relates to a processing method of titanium alloy wire, in particular to a cold drawing method of GR5 titanium alloy. 【Background technique】 [0002] As we all know, titanium is divided into pure titanium and titanium alloys, that is, titanium alloys are added with other alloy elements, and independent titanium elements are pure titanium "which contains some extremely small amounts of unavoidable impurities". According to the composition of titanium alloys Different from room temperature structure, it can be divided into α-titanium alloy and near-α-type alloy, (α+β)-type alloy, near-β-type alloy and β-type alloy; titanium and titanium alloy wire products are generally hard (Y) and annealed state (M). It has good corrosion resistance, high specific strength, non-magnetic, high biocompatibility, low impedance to ultrasonic waves, high sound transmission coefficient, hydrogen storage and good shape memory function, etc. characteristic. I...

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Problems solved by technology

[0004] The problem with the titanium alloy wire obtained in the aforementioned hot drawing process is that the base material is heated to above 600°C during hot drawing, which will increase the oxygen, hydrogen, and carburization of the titanium alloy wire material, making the wire after hot drawing become Brittle and hard, which hinders the reprocessing of titanium alloy wire