Titanium/titanium alloy surface oxygen permeation method

Abstract

The invention discloses a titanium/titanium alloy surface oxygen permeation method. The titanium/titanium alloy surface oxygen permeation method comprises the process steps of (1) putting titanium and a titanium alloy in an electric furnace, carrying out heat treatment on the titanium and the titanium alloy at the temperature of 750-900 DEG C for 3-20 hours; and (2) taking out the titanium or the titanium alloy treated in the first step, rapidly putting the titanium and the titanium alloy in cold water for quenching treatment to obtain the titanium or the titanium alloy with a black oxygen permeation layer. The titanium/titanium alloy surface oxygen permeation method has the effects and the beneficial effects that (1) an oxygen permeation modified layer with high hardness can be obtained, the highest surface hardness of the oxygen permeation modified layer is higher than 800Hv, thus overcomes the defects of the titanium/titanium alloy, such as low surface hardness and poor abrasive resistance; (2) since a thin black titanium alloy oxide layer remains on the surface of the oxygen permeation layer obtain by virtue of the method, the extinction requirements of military and optical instruments can be satisfied; (3) the method is simple in the process and does not need to be carried out by professionals; and (4) the cost is low, air is adopted as an oxygen permeation agent, water is adopted as a quenching medium, and no other extra materials are needed.

Description

technical field [0001] The invention belongs to the technical field of surface treatment and relates to the surface modification and strengthening of titanium and titanium alloys, in particular to a method for oxygen penetration on the surface of titanium and titanium alloys. Background technique [0002] Titanium and titanium alloys have the advantages of low density, good corrosion resistance, and high specific strength, and are widely used in aerospace, chemical, biomedical and other fields. However, titanium and titanium alloys have low surface hardness, high friction coefficient, poor friction and wear resistance, and are especially sensitive to fretting wear; under the action of friction, mechanical parts are prone to heat, adhesion, seizure and high temperature oxidation, resulting in plasticity and strength. decline, which severely limits its scope of application. Oxygen permeation technology on the surface of titanium alloy that has appeared in recent years can eff...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is the poor wear resistance caused by the low surface hardness of titanium and titanium alloys, the problems of high cost, complicated process, and requirements on the shape of the treatment parts in the conventional oxygen permeation technology, etc., to provide a low-cost, It is suitable for treating various sizes and shapes without any pretreatment of titanium and titanium alloy surface oxygen penetration method to improve the surface hardness and wear resistance of titanium alloy