Technological method for heat treatment to titanium alloy welded component

A technology of welding components and process methods, applied in the field of heat treatment and annealing, can solve the problems of increasing manpower, material resources, heat treatment temperature and heat treatment furnace temperature inconsistency, long cycle, etc. Effect

Pending Publication Date: 2019-05-07
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large number and variety of parts, most of the parts are tailor-welded, and the cost of vacuum heat treatment is high, the cycle is long, and the size of the parts to be processed is limited by the size of the working area of ​​the vacuum chamber, so vacuum heat treatment is adopted It will significantly increase the manufacturing cost of titanium alloy components, and has certain limitations
[0004] Aiming at the post-weld heat treatment process of titanium alloy, the invention patent "A Titanium Alloy Non-vacuum Furnace Heat Treatment Process" with the patent application number CN200710189892.4 (the announcement number is CN101423922A) discloses a titanium alloy non-vacuum furnace heat treatment process, including making heat treatment The box and the workpiece are put into the heat treatment box, the heat treatment box is vacuumed, and the heat treatment is four processes. However, making the box according to the size of the product increases manpower and material resources. It is only suitable for single or small batch products, and the workpiece is put into the heat treatment box. The sealing problem related to the box before vacuuming is not clearly explained, and the heat treatment of the workpiece in the box may cause the heat treatment temperature of the workpiece in the box to be inconsistent with the temperature of the heat treatment furnace, resulting in poor heat treatment effect. In addition, a vacuum pump is required for vacuuming, and argon is filled The gas needs to be equipped with an argon tank. Generally speaking, the process is relatively cumbersome and the implementation cost is high

Method used

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  • Technological method for heat treatment to titanium alloy welded component
  • Technological method for heat treatment to titanium alloy welded component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A1

[0027] Prepare three samples of titanium alloy welded components, clean the surface of titanium alloy welded components with acetone, dilute the paint containing water-soluble borosilicate glass enamel with a small amount of water and stir it evenly, and then apply a layer of it with a brush. On the surface of the component, after the first layer of paint dries naturally, another layer of paint is applied, and after the second layer of paint dries naturally, the component to be treated is put into a resistance furnace, and the heat treatment process parameter is set as the annealing temperature T m =500°C, heating time t 升 = 1.5h, holding time t m =2.0h, after cooling down to below 200°C with the furnace, take it out of the furnace, air cool to room temperature, and use a wire brush to clean the surface coating of the components.

[0028] After the heat treatment is completed, the surface of the titanium alloy test plate changes from silvery white to silvery white mixed with ...

Embodiment A2

[0030] Clean the surface of the titanium alloy welded component with alcohol, dilute the paint containing water-soluble borosilicate glass enamel with a small amount of water and stir it evenly, then apply a layer on the surface of the component by spraying method, and dry the first layer of paint at 80°C After that, apply another layer of paint. After the second layer of paint is dried at 80°C, put the component to be treated into the resistance furnace, and set the heat treatment process parameter as the annealing temperature T m =550°C, heating time t 升 : 1.7h, holding time t m = 2.2h, after cooling down to below 200°C with the furnace, take it out of the furnace, air cool to room temperature, and use a high-pressure water gun to clean the surface coating of the components.

[0031] After the heat treatment was completed, the surface of the titanium alloy test plate changed from silvery white to silvery white mixed with light blue, and then the mechanical properties of the...

Embodiment A3

[0033] Clean the surface of the titanium alloy welded component with acetone, dilute the paint containing water-soluble borosilicate glass enamel with a small amount of water and stir it evenly, then apply a layer on the surface of the component with a brush, and wait for the first layer of paint to naturally After drying, apply another layer of paint. After the second layer of paint dries naturally, put the component to be treated into the resistance furnace, and set the heat treatment process parameter as the annealing temperature T m =600°C, heating time t 升 =2.0h, holding time t m =2.5h, after cooling down to below 200°C with the furnace, take it out of the furnace, air cool to room temperature, and use a wire brush to clean the coating on the surface of the component.

[0034] After the heat treatment was completed, the surface of the titanium alloy test plate changed from silvery white to silvery white mixed with light blue, and then the mechanical properties of the bas...

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PUM

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Abstract

The invention relates to a technological method for heat treatment to a titanium alloy welded component. The technological method comprises the following step (1) of removing oil stain from the surface of the titanium alloy welded component to be treated; the step (2) of adding a little water to high temperature anti-oxidation coatings for dilution, and mixing the water and the coatings uniformlyto obtain high temperature anti-oxidation coating aqueous solutions, and coating the aqueous solutions on the surface of the titanium alloy welded component to be treated; the step (3) of clamping andfixing the titanium alloy welded component to be treated with a tool after drying the high temperature anti-oxidation coating aqueous solutions; the step (4) placing the titanium alloy welded component clamped and fixed with the tool properly into a resistance furnace, and setting heat treatment process parameters, wherein the annealing temperature Tm is 500-600 DEG C, the temperature rise time tis 1.5-2.0 h, and the holding time tm is 2.0-2.5 h; cooling the titanium alloy welded component in the furnace to 200 DEG C and below, taking out the titanium alloy welded component from the furnace,and air-cooling the titanium alloy welded component to room temperature; and the step (5) of cleaning the coatings on the surface of the titanium alloy welded component. Compared with the prior art,the technological method has the advantages of convenient operation, and high economy and adaptability.

Description

technical field [0001] The invention relates to the technical field of heat treatment and annealing, in particular to a heat treatment process for titanium alloy welded components. Background technique [0002] Titanium alloy has many advantages such as low density, good corrosion resistance, high specific strength, etc., especially with high structural bearing capacity, it can also achieve a large weight reduction of equipment structure. It is widely used in chemical and weapon industry and other fields. Welding technology is the key technology for forming titanium alloy structural parts. After welding, titanium alloy components will produce welding stress and welding deformation. Heat treatment can not only fully eliminate welding internal stress, improve service safety and service life of titanium alloy components, but also Correction of welding distortion. Due to the strong chemical activity of titanium alloy, it is easy to absorb impurity elements such as oxygen, nitr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18
Inventor 马良超马冰陈东高王大锋辛海鹰戴宇张迎迎任宝辉张龙
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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