Titanium alloy part high-temperature endurance non-destructive marking method

Abstract

The application belongs to the field of marking technology, and particularly relates to a high-temperature durable non-destructive marking method for titanium alloy parts. The technical scheme of the application is as follows: a high-temperature durable non-destructive marking method for titanium alloy parts, which comprises the following steps: performing code spraying marking on the marking position of the titanium alloy part, and then performing paint spraying protection on the marking area. The high-temperature durable non-destructive marking method for titanium alloy parts provided by the application can form clear and identifiable marks, improve the high-temperature service environment marking durability, effectively avoid part marking damage, and enhance the service safety of the titanium alloy part.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of marking process, and particularly relates to a high-temperature durable non-destructive marking method for titanium alloy parts. BACKGROUND

[0002] Code marking is a method of marking on the surface of an object by using inkjet technology. The inkjet printer head sprays ink onto the target object, which can achieve high-definition and high-speed marking effect. Code marking has the characteristics of editable marking content, strong adaptability and simple operation. However, the highest temperature-resistant ink can only resist about 200 DEG C, and it will be removed when encountering organic solvents such as alcohol, so it cannot be used for permanent marking on aero-engine parts.

[0003] Titanium alloy is widely used in aero-engine blades, casings, disc shafts and other parts due to its high-temperature resistance, high specific strength, good corrosion resistance and small thermal expansion coefficient. However, titanium alloy has strong notch sensitivity and high requirements for the integrity of the processed surface. Therefore, the processing method should avoid damaging the parts.

[0004] For titanium alloy parts of an aero-engine, the marking method should consider not damaging the surface integrity, and the marking should be clearly identifiable after high-temperature service and resistant to airflow erosion. The electrolytic marking process currently used damages the surface integrity of the parts to some extent, and the marking clarity is not as good as code marking. After high-temperature service, the oxidized marking on the surface of the parts is difficult to identify. As a semi-permanent marking method, code marking does not damage the parts, but it is difficult to maintain in a high-temperature service environment. SUMMARY

[0005] The application provides a high-temperature durable non-destructive marking method for titanium alloy parts, which can form clear and identifiable markings, improve the durability of the markings in a high-temperature service environment, effectively avoid damage to the markings of the parts, and enhance the service safety of the titanium alloy parts.

[0006] The technical solution of the application is as follows:

[0007] A high-temperature durable non-destructive marking method for titanium alloy parts, which sprays code marking on the marking position of the titanium alloy part, and then sprays paint on the marking area for protection.

[0008] Further, the high-temperature durable non-destructive marking method for titanium alloy parts comprises the following steps:

[0009] Step 1: Part preparation; clean the parts, and if necessary, wipe them with acetone;

[0010] Step 2: Code marking of the part; code marking is performed on the marking position of the titanium alloy part;

[0011] Step three: protection before painting; protect the non-painting area around the marking area;

[0012] Step four: varnish preparation; choose a varnish that is not soluble in inkjet printing and resistant to high temperature of 450 DEG C, and fully stir to mix evenly;

[0013] Step five: painting; paint the marking area;

[0014] Step six: post-painting treatment; air dry and cure at room temperature or bake;

[0015] Step seven: marking inspection; check whether the marking is clear;

[0016] Step eight: part cleaning; clean the parts with compressed air to remove surface particles.

[0017] Further, in the step three of the titanium alloy part high-temperature durable non-destructive marking method, the non-painting area is protected by using silica gel film.

[0018] Further, in the step four of the titanium alloy part high-temperature durable non-destructive marking method, the varnish is polyurethane varnish, and the stirring time is 10-15 min.

[0019] Further, in the step five of the titanium alloy part high-temperature durable non-destructive marking method, the spraying pressure is 0.2-0.6 MPa, the spraying gun spraying distance is 100-200 mm, the spraying angle is perpendicular to the surface of the part, and the spraying times are less than 3 times.

[0020] Further, in the step six of the titanium alloy part high-temperature durable non-destructive marking method, the method of 120 DEG C baking for 1 h is adopted.

[0021] The titanium alloy part high-temperature durable non-destructive marking method of the application can form clear and identifiable marks, improve the marking durability in high-temperature service environment, effectively avoid part marking damage, and enhance the service safety of titanium alloy parts. DETAILED DESCRIPTION

[0022] A titanium alloy part high-temperature durable non-destructive marking method, which implements inkjet printing on the marking position of the titanium alloy part, and then paints the marking area for protection. Specifically, the method comprises the following steps:

[0023] Step one: part preparation; clean the parts, and if necessary, wipe them with acetone;

[0024] Step two: inkjet printing of the part; implement inkjet printing on the marking position of the titanium alloy part;

[0025] Step three: protection before painting; protect the non-painting area around the marking area with silica gel film;

[0026] Step four: varnish preparation; select polyurethane varnish which is not dissolved in inkjet printing and resistant to high temperature 450℃, stir 10-15min to make it mix evenly;

[0027] Step five: paint spraying; spray paint to the printing area, spraying pressure 0.2-0.6MPa, spraying gun spraying distance 100-200mm, spraying angle perpendicular to the surface of the part, spraying times less than 3 times;

[0028] Step six: post-treatment of paint spraying; dry at 120℃ for 1h to cure;

[0029] Step seven: printing inspection; check whether the printing is clear;

[0030] Step eight: part cleaning; clean the part with compressed air to remove surface attached particles.

Claims

1. A method of non-destructive marking of a titanium alloy part at high temperature under endurance, characterized in that, The step of spraying code marking is implemented on the marking position of the titanium alloy part, and then the marking area is painted for protection; comprising the following steps: Step one: part preparation; clean the part and wipe it with acetone; Step two: part code marking; implement the step of spraying code marking on the marking position of the titanium alloy part; Step three: protection before painting; protect the non-painting area around the marking area by using silica gel film; Step four: varnish preparation; select varnish which is not dissolved in code marking and resistant to 450℃ high temperature, and fully stir to make it mixed evenly; Step five: painting; paint the marking area; Step six: post-treatment after painting; dry and solidify at room temperature or dry by baking; Step seven: marking inspection; check whether the marking is clear; Step eight: part cleaning; clean the part by using compressed air to remove the surface attached particles.

2. The method of claim 1, wherein: In the step four, the varnish is polyurethane varnish, and stirring time is 10-15 minutes.

3. The method of claim 1, wherein, In the step five, the spraying pressure is 0.2-0.6 MPa, the spraying gun spraying distance is 100-200 mm, the spraying angle is perpendicular to the surface of the part, and the spraying times are less than 3 times.

4. The method of claim 1, wherein, In the step six, the method of 120℃ baking for 1h is adopted.