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Thermal treatment method for enhancing strength of TC4 titanium alloy

A heat treatment method and titanium alloy technology, applied in the field of heat treatment, can solve the problems of not being able to meet the requirements of titanium alloy strength, low hardness value, etc., achieve good promotion and application value, uniform hardness, and improve the effect of application range

Inactive Publication Date: 2012-09-19
河南平原光电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing data manuals, the hardness value of titanium alloy after solution aging treatment is relatively low (related technical data, the mechanical properties of TC4 titanium alloy include hardness at room temperature of 255HBS~341HBS (equivalent to 25.5~37HRC); The hardness at room temperature is 293HBS~361HBS (equivalent to 30.5~38HRC), which is still not able to meet the strength requirements of titanium alloys in some fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A heat treatment method to enhance the strength of TC4 titanium alloy. The TC4 titanium alloy is degreased by ultrasonic waves at room temperature, and the TC4 titanium alloy with an effective size of 10mm is placed in a box-type electric furnace at 960°C. The alloy is quenched into 5% NaOH solution, the parts are cleaned after leaving the tank, the surface is polished with sandpaper, and the hardness value is checked on a Rockwell hardness tester. Then put the TC4 titanium alloy in a well-type electric furnace at 540°C, keep it warm for 4 hours, air-cool after it comes out of the furnace, polish the plane with sandpaper, check the hardness of the parts on the Rockwell hardness tester, and then sandblast (fine quartz sand or sand ash) ), the heat treatment ends.

Embodiment 2

[0015] A heat treatment method to enhance the strength of TC4 titanium alloy. The TC4 titanium alloy is degreased by ultrasonic waves at room temperature, and the TC4 titanium alloy with an effective size of 10 mm is placed in a box-type electric furnace at 950 ° C. The titanium alloy is quenched into 10% NaOH solution, the parts are cleaned after leaving the tank, the surface is polished with sandpaper, and the hardness value is checked on a Rockwell hardness tester. Then put the TC4 titanium alloy in a well-type electric furnace at 530°C, keep it warm for 4 hours, air-cool after it comes out of the furnace, sand it out of the plane, check the hardness of the parts on the Rockwell hardness tester, and then sandblast (fine quartz sand or sand ash) ), the heat treatment ends.

Embodiment 3

[0017] A heat treatment method to enhance the strength of TC4 titanium alloy. The TC4 titanium alloy is degreased by ultrasonic waves at room temperature, and the TC4 titanium alloy with an effective size of 10mm is placed in a box-type electric furnace at 970°C. The titanium alloy is quenched into a 15% NaOH solution, the parts are cleaned after leaving the tank, the surface is polished with sandpaper, and the hardness value is checked on a Rockwell hardness tester. Then put the TC4 titanium alloy in a well-type electric furnace at 550°C, keep it warm for 3 hours, air-cool after it comes out of the furnace, polish it with sandpaper, check the hardness of the part on the Rockwell hardness tester, and then sandblast it (fine quartz sand or sand ash) ), the heat treatment ends.

[0018] The hardness of the TC4 titanium alloy processed by the method of the invention reaches 42HRC-44HRC, and the hardness range not only improves the wear resistance of parts, but also improves the a...

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Abstract

The invention discloses a thermal treatment method for enhancing the strength of TC4 titanium alloy, comprising the steps of ultrasonic normal-temperature oil removal, hanger suspension, solid-solution processing, quenching, aging processing, part Rockwell hardness detection, surface quality and sand blasting; in the quenching process, a quenching medium is sodium hydroxide solution with concentration being 5-15% and temperature being 0-40 DEG C, and quenching transfer time is 2-6s; in the solid-solution processing, the TC4 titanium alloy is arranged in a box-type electric furnace for solid-solution processing, the temperature ranges from 950 to 970 DEG C, and the heat preservation time is 1-1.5h; in the aging processing, the TC4 titanium alloy is arranged in a well-type electric furnace for aging process, the temperature ranges from 530-550 DEG C and the heat preservation time is 3-4h; and cooling is performed in an air cooling manner. With the previous process arrangement, the obtained TC4 titanium alloy is even and consistent in hardness, the abrasive resistance is improved, and the hardness reaches 42-44 HRC; therefore, the application range of the TC4 titanium alloy material is expanded.

Description

technical field [0001] The invention relates to a heat treatment method for enhancing the strength of a TC4 titanium alloy, which belongs to the field of heat treatment. Background technique [0002] TC4 titanium alloy material is used as an important material in aerospace and aviation because of its light weight, high specific strength, and high corrosion resistance in oxidizing media or seawater and marine atmospheres. It has been used in the military industry in recent years. expanding day by day. In optical instruments, not only the light weight of titanium alloy is required, but also high wear resistance and high hardness are required. In the existing data manuals, the hardness value of titanium alloy after solution aging treatment is relatively low (related technical data, the mechanical properties of TC4 titanium alloy include hardness at room temperature of 255HBS~341HBS (equivalent to 25.5~37HRC); The room temperature hardness is 293HBS~361HBS (equivalent to 30.5~...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18
Inventor 张利红张明常自让张涛陈胜利任清李娜李红义
Owner 河南平原光电有限公司