CN-116837318-B - Shape compound treatment method for antifriction and antiwear titanium alloy surface

Abstract

The invention discloses a titanium alloy surface antifriction and antiwear shape compound treatment method, which is implemented according to the following steps of step 1, adopting photosensitive blue oil as an etching inhibitor, adopting a wet etching technology to process micro-textures on the titanium alloy surface, and step 2, carrying out thermal oxidation treatment on the textured titanium alloy obtained in step 1 to obtain the shape compound treated titanium alloy. The invention can realize the synergistic effect of micro-texture and thermal oxidation, can simultaneously improve the antifriction and antiwear properties of the titanium alloy surface, is beneficial to expanding the application range of the titanium alloy and prolonging the service life of titanium alloy parts under the friction working condition.

Inventors

• YU SHOUMING
• LIANG ZHONGQIANG
• WEI JIAXIN
• SUN YUXUAN
• ZHANG GUOJUN
• LIN YANKAI
• MIAO GENYUAN
• FENG XIAOYU

Assignees

• 西安理工大学

Dates

Publication Date

20260505

Application Date

20230704

Claims (1)

1. 1. The shape composite treatment method for antifriction and antiwear titanium alloy surface is characterized by comprising the following steps: Step 1, processing a micro texture on the surface of a titanium alloy by adopting a wet etching technology by taking photosensitive blue oil as an etching inhibitor; Step 2, performing thermal oxidation treatment on the textured titanium alloy obtained in the step 1 to obtain a titanium alloy subjected to shape compounding treatment; The step1 is specifically implemented according to the following steps: Step 1.1, pretreating the surface of a workpiece and coating blue oil; step 1.2, performing pre-baking operation and self-making a mask; Step 1.3, exposing and developing the mask in the step 1.2; step 1.4, performing post-baking operation and etching; Step 1.5, demolding the etched workpiece; The method comprises the steps of 1.1, mechanically polishing a titanium alloy workpiece, cleaning, drying for standby, then uniformly coating photosensitive blue oil on the surface of the dried titanium alloy workpiece by a doctor blade or spraying method, wherein the thickness of the blue oil is 0.2-0.6 mm, and standing in a shade place for not less than 30min after coating; transferring a titanium alloy workpiece coated with photosensitive blue oil into a drying oven with the temperature of 50-60 ℃ for heat preservation for 24-48 hours until the photosensitive blue oil is dried, drawing a two-dimensional micro-texture pattern according to the micro-texture parameters required to be prepared, manufacturing a film mask plate by using a printer, wherein the part required to be textured is a black light absorption layer, and the rest part is a light transmission layer; placing the manufactured mask on a workpiece subjected to pre-baking, compacting by using organic glass, exposing by using two or more ultraviolet lamps for 4-8 min, exposing for 10-20 cm, soaking the exposed workpiece in developing solution for 1min, taking out the workpiece, brushing the surface of photosensitive blue oil by using a soft brush dipped with the developing solution until the required micro-texture is completely exposed and no developing residue exists, and flushing the workpiece twice by using deionized water after development is completed; Placing the developed workpiece in a drying oven with the temperature of 50-60 ℃ for 20-30 min, placing the dried workpiece in a titanium alloy etching liquid for etching, and flushing the workpiece with deionized water twice after the etching is finished; The method comprises the following steps of 1.5, soaking the etched workpiece in a demolding liquid for 5-10 min, lightly brushing the surface of the workpiece by using a soft brush to remove blue oil, and washing the workpiece twice by using deionized water and drying the workpiece by blow drying after demolding, wherein the demolding liquid is sodium hydroxide solution prepared by NaOH and deionized water according to a weight ratio of 1:20, and the using temperature is 38-45 ℃; The developing solution is sodium carbonate solution prepared by NaCO 3 and deionized water according to a weight ratio of 1:100, and the use temperature is 25-30 ℃; The titanium alloy etching liquid comprises hydrofluoric acid, sodium dodecyl benzene sulfonate and deionized water=32:55:0.1:413 in a weight ratio, wherein the use temperature is 25-30 ℃; The textured titanium alloy workpiece is placed in a heating furnace, kept at 700 ℃ for 7 hours, and then cooled to room temperature along with the furnace; the areal density of the microtexture was 26%.

Description

Shape compound treatment method for antifriction and antiwear titanium alloy surface Technical Field The invention belongs to the technical field of metal surface treatment methods, and particularly relates to a shape compound treatment method for antifriction and antiwear titanium alloy surfaces. Background The titanium alloy is widely applied to the fields of aerospace, weaponry, biomedicine and the like due to low density, high specific strength, excellent corrosion resistance and the like, but the defects of low surface hardness, high friction coefficient, poor wear resistance and the like seriously restrict the use of the titanium alloy under the friction working condition, so that the improvement of the antifriction and wear resistance of the surface of the titanium alloy has important significance for expanding the application range of the titanium alloy and prolonging the service life of titanium alloy parts. The surface micro-texture has antifriction effect, but the edge stress of the texture is concentrated and the abrasion is serious, while the thermal oxidation technology is a simple and economic method capable of improving the abrasion resistance of the titanium alloy, but the friction coefficient of the oxide layer is large, and the oxide layer is easy to fall off, delaminate and even crack. The surface micro-texture and the thermal oxidation technology are combined, the existence of the texture is beneficial to improving the depth and the adhesive force of an oxide layer, the falling-off and layering phenomena of an oxide film are reduced, and the existence of the oxide film can improve the surface hardness and prolong the service life of the texture. The research shows that although the surface micro-texture and thermal oxidation composite treatment can obviously improve the wear resistance of the titanium alloy, the friction coefficient can not be reduced at the same time, the friction reduction and wear resistance can be realized at the same time by utilizing the micro-texture and thermal oxidation shape composite treatment, and the method mainly depends on whether the micro-texture and the thermal oxidation can realize a synergistic effect, and involves more important parameters such as the diameter, the surface density, the depth and the like of the micro-texture, the temperature and the time of the thermal oxidation and the like. In addition, the current processing method of the micro-texture on the surface of the titanium alloy is mainly based on a laser processing technology, but when the material is ablated and removed at a high temperature, the material such as bulges, slag and the like are easy to be accumulated at the edge of the micro-pit, the bottom of the micro-pit is uneven and has extremely large roughness, larger thermal stress, thermal damage and the like can be introduced into a processing area, and the efficiency is lower and the cost is high in large-surface-area and large-scale micro-texture processing. Disclosure of Invention The invention aims to provide a shape composite treatment method for antifriction and antiwear performance of a titanium alloy surface, which solves the problem that the antifriction and antiwear performance of the titanium alloy is difficult to improve simultaneously by micro-texture and thermal oxidation composite treatment in the prior art. The technical scheme of the invention is that the shape composite treatment method for antifriction and antiwear titanium alloy surface is implemented according to the following steps: Step 1, processing a micro texture on the surface of a titanium alloy by adopting a wet etching technology by taking photosensitive blue oil as an etching inhibitor; and 2, performing thermal oxidation treatment on the textured titanium alloy obtained in the step 1 to obtain the titanium alloy subjected to the shape compounding treatment. The invention is also characterized in that: the step 1 is specifically implemented according to the following steps: Step 1.1, pretreating the surface of a workpiece and coating blue oil; step 1.2, performing pre-baking operation and self-making a mask; Step 1.3, exposing and developing the mask in the step 1.2; step 1.4, performing post-baking operation and etching; and 1.5, demolding the etched workpiece. The step 1.1 is that a titanium alloy workpiece is mechanically polished, cleaned and dried for standby, photosensitive blue oil is uniformly coated on the surface of the dried titanium alloy workpiece by a knife coating or spraying method, the thickness of the blue oil is 0.2 mm-0.6 mm, and the coated titanium alloy workpiece is kept stand at a shade place for not less than 30min. The step 1.2 is that a titanium alloy workpiece coated with photosensitive blue oil is transferred into a drying oven with the temperature of 50-60 ℃ and is kept for 24-48 hours until the photosensitive blue oil is dried, then a two-dimensional micro-texture pattern is drawn according to micro-texture parameter