Hardening method of inner surface of cylinder barrel of titanium and titanium alloy hydraulic cylinder

A hydraulic cylinder and inner surface technology, which is applied in the direction of superimposed layer plating, metal material coating process, coating, etc., can solve problems such as easy to fall off, failure, low finish, and short service life of the micro-arc oxidation film layer, and achieve Good metallurgical compatibility, improved production efficiency, and good chemical stability

Inactive Publication Date: 2015-03-04
西安赛福斯材料防护有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, for the surface hardening of titanium and titanium alloys to improve the wear resistance and anti-seizing problems, many methods have emerged, such as using supersonic flame spraying WC film layer; using micro-arc oxidation to generate titanium oxide film layer, using vacuum conditions Down carburizing treatment to prepare TiC film, etc., but due to the limitation of the use environment of titanium alloy hydraulic cylinder and the complex appearance of parts, it is difficult to achieve satisfactory results
For example, supersonic flame spraying treatment is difficult to spray film on the surface of titanium and titanium alloy parts on the inner wall of deep holes. The service life of micro-arc oxidation film is short and the finish is low, and it is easy to fall off and fail under heavy load; carburizing under vacuum conditions will affect titanium. And the mechanical properties of titanium alloys limit the manufacture and use of titanium alloy hydraulic cylinders, which cannot meet the higher use requirements of titanium and titanium alloy hydraulic cylinders.

Method used

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  • Hardening method of inner surface of cylinder barrel of titanium and titanium alloy hydraulic cylinder
  • Hardening method of inner surface of cylinder barrel of titanium and titanium alloy hydraulic cylinder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1. Polish the inner surface of the hydraulic cylinder barrel, and then soak the polished hydraulic cylinder barrel in an industrial cleaning solution at 40°C to 60°C for ultrasonic degreasing cleaning to remove the oil on the surface of the hydraulic cylinder barrel , and then adopt the method of ethanol washing and hot air drying to dehydrate the hydraulic cylinder cylinder after oil removal; the material of the hydraulic cylinder cylinder is TC6 titanium alloy; the specific process of the polishing process is: first use 80 mesh nylon Wheel Fit Al 2 o 3 The polishing wax was polished for 15 minutes, and the speed of the polishing machine was 1000r / min; then a 240-mesh cloth wheel was used to cooperate with Al 2 o 3 The polishing wax was polished for 30 minutes, and the speed of the polishing machine was 1800r / min; finally, the spinning wheel was used to polish with titanium polishing wax for 30 minutes, and the speed of the equipment was 2200r / min;

[0029] Ste...

Embodiment 2

[0034] Step 1. Polish the inner surface of the hydraulic cylinder barrel, then soak the polished hydraulic cylinder barrel in acetone for ultrasonic degreasing and cleaning to remove the oil on the surface of the hydraulic cylinder barrel, and then dry it in a drying oven Carry out dehydration treatment to the hydraulic cylinder barrel after oil stain removal; The material of described hydraulic cylinder barrel is TA1 pure titanium; 2 o 3 The polishing wax was polished for 10 minutes, and the speed of the polishing machine was 1000r / min; then a 240-mesh cloth wheel was used to cooperate with Al 2 o 3 The polishing wax was polished for 20 minutes, and the speed of the polishing machine was 1800r / min; finally, the spinning wheel was used to polish with titanium polishing wax for 20 minutes, and the speed of the equipment was 2200r / min;

[0035] Step 2. Place the dehydrated hydraulic cylinder barrel in step 1 as the cathode in a double-layer glow ionization metallization furnac...

Embodiment 3

[0040] Step 1. Polish the inner surface of the hydraulic cylinder barrel, and then soak the polished hydraulic cylinder barrel in an industrial cleaning solution at 40°C to 60°C for ultrasonic degreasing cleaning to remove the oil on the surface of the hydraulic cylinder barrel , and then adopt the hot air drying method after ethanol washing to carry out dehydration treatment to the hydraulic cylinder barrel after removing the oil stain; the material of the hydraulic cylinder barrel is TC4 titanium alloy; the specific process of the polishing treatment is: first use 80 mesh nylon Wheel Fit Al 2 o 3 The polishing wax was polished for 20 minutes, and the speed of the polishing machine was 1000r / min; then a 240-mesh cloth wheel was used to cooperate with Al 2 o 3 The polishing wax was polished for 25 minutes, and the speed of the polishing machine was 1800r / min; finally, the spinning wheel was used to polish with titanium polishing wax for 30 minutes, and the equipment speed wa...

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Abstract

The invention discloses a hardening method for an inner surface of a cylinder barrel of a titanium and titanium alloy hydraulic cylinder. The hardening method comprises the following steps: I, polishing the inner surface of the cylinder barrel of the hydraulic cylinder, then, removing greasy dirt and dehydrating; II, putting the dehydrated cylinder barrel, which is used as a cathode, of the hydraulic cylinder in a double-layer glow ion diffusion metalizing furnace, putting a graphite source electrode in the cylinder barrel of the hydraulic cylinder, in the presence of argon gas, generating glow under the high-voltage electric fields by utilizing an anode and a cathode to perform bombardment activation on the inner surface of the cylinder barrel of the hydraulic cylinder; III, after the bombardment activation is finished, introducing a gas mixture of the argon gas and oxygen gas into the double-layer glow ion diffusion metalizing furnace, generating double-layer glow under the high-voltage electric fields by utilizing the anode and the graphite source electrode as well as the anode and the cathode to perform oxyarburizing on the inner surface of the cylinder barrel of the hydraulic cylinder to obtain a composite membrane layer on the inner surface of the cylinder barrel of the hydraulic cylinder. The composite film layer prepared by the hardening method disclosed by the invention is high in bonding strength and good in wear resistance, and capable of effectively avoiding the titanium and titanium alloy occlusive locking problem.

Description

technical field [0001] The invention belongs to the technical field of titanium and titanium alloy surface hardening, and in particular relates to a method for hardening the inner surface of a titanium and titanium alloy hydraulic cylinder barrel. Background technique [0002] With the demand for titanium and titanium alloy hydraulic cylinders with high strength and good wear resistance in aerospace, shipbuilding and other fields, titanium and titanium alloy transmission parts are widely used. Usually titanium and titanium alloys have high specific strength and corrosion resistance. Excellent performance, therefore, the weight reduction and service life of aerospace parts are greatly improved. However, titanium and titanium alloys have low surface hardness, poor wear resistance, and are more sensitive to adhesive wear. When used under conditions such as high torque and heavy load, parts will fail due to local friction and wear. As the adhesion phenomenon continues to occur a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/36C23C8/02C23C12/00C23C28/04
Inventor 罗小峰王宝云高广睿李争显屈静
Owner 西安赛福斯材料防护有限责任公司
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