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A kind of preparation method of gradient hardened titanium alloy

A technology for titanium alloys and titanium alloy plates is applied in the field of preparation of gradient hardening titanium alloys, which can solve the problems of restricting the development of gradient hardening titanium alloys, unstable processes, and high equipment costs, and achieve good sample integrity and hardening uniformity. The effect of good stability and high preparation efficiency

Active Publication Date: 2022-02-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the method of preparing gradient hardened titanium alloy is usually to prepare a composite film structure with gradient hardness on the surface of titanium alloy. The above method is cumbersome, high equipment cost, unstable process, low utilization rate, high scrap rate, etc. Development of Hardened Titanium Alloys

Method used

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  • A kind of preparation method of gradient hardened titanium alloy
  • A kind of preparation method of gradient hardened titanium alloy
  • A kind of preparation method of gradient hardened titanium alloy

Examples

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Effect test

Embodiment 1

[0034] A method of preparing a gradient hardened titanium alloy, the method steps are as follows:

[0035] Step 1, the surface of the titanium alloy is polished by hand-held electric grinding wheel to remove the oxide layer, and the surface of the surface is removed with anhydrous ethanol to obtain a cleaner titanium alloy;

[0036] Step 2, place the steel base on a pre-paving sand heap, put the steel bulletum and titanium alloy from the bottom of the steel base, to ensure that the bottom surface of the steel base and the momentum block of the momentum block The butter is applied to the contact surface of the two, the thickness is 0.5 mm;

[0037] Step three, evenly wipe a layer of butter in the titanium alloy precision surface, the thickness is 0.5 mm, and then the explosive frame is fixed on the surface of the steel base.

[0038] Step 4, put press the plate-shaped C4 explosives into the explosive frame, the explosive thickness is 5mm, the explosion is 7746m / s;

[0039] Step 5...

Embodiment 2

[0044] In this embodiment, the impact treatment is carried out twice, and the remaining same in Example 1.

[0045] Vickers hardness distribution of the gradient hardened titanium alloy image 3 As shown, the maximum hardness after secondary harden increases to 300HV, within 0-1 mm depth range, the maximum hardness of titanium alloy after secondary hardening is increased by 71%, and the secondary hardening depth is about 3.5mm. .

[0046] XRD test of the gradient hardened titanium alloy Figure 4 As shown, the results show that the phase change of α to ω during the hardening of the titanium alloy, and the phase change content of ω after secondary hardening is higher, and therefore, the hardness of the titanium alloy is further increased.

Embodiment 3

[0048] A method of preparing a gradient hardened titanium alloy, the method steps are as follows:

[0049] Step 1, the surface of the titanium alloy is polished by hand-held electric grinding wheel to remove the oxide layer, and the surface of the surface is removed with anhydrous ethanol to obtain a cleaner titanium alloy;

[0050] Step 2, place the steel base on a pre-paving sand heap, put the steel bulletum and titanium alloy from the bottom of the steel base, to ensure that the bottom surface of the steel base and the momentum block of the momentum block The butter is applied to the contact surface of the two, the thickness is 0.5 mm;

[0051] Step three, evenly wipe a layer of butter in the titanium alloy precision surface, the thickness is 0.5 mm, and then the explosive frame is fixed on the surface of the steel base.

[0052] Step 4, put the pressed C4 explosives into the explosive frame, the explosive thickness is 3mm, the explosion is 7746m / s;

[0053] Step 5, insert the ...

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Abstract

The invention relates to a preparation method of a gradient hardening titanium alloy, which belongs to the technical field of gradient hardening materials. Put the steel momentum block and the cleaned titanium alloy plate into the steel base with through holes from bottom to top. The cross-sectional size of the through hole matches the cross-sectional size of the steel momentum block and titanium alloy plate. The total thickness of the momentum block and the titanium alloy match; the explosive frame is fixed on the edge of the upper surface of the steel base, and a high-explosive explosive with a detonation velocity above 7000m / s pressed into a plate-shaped structure is placed in the explosive frame, and the explosive is detonated at one end of the upper surface of the explosive Impact treatment is performed on the titanium alloy to obtain a gradient hardened titanium alloy. The method can effectively avoid material damage caused by "boundary effect" during the impact treatment of high-detonation velocity explosives, and then realize gradient hardening of the upper surface of the titanium alloy through impact treatment.

Description

Technical field [0001] The present invention relates to a method of preparing a gradient hardened titanium alloy, belonging to the technical field of gradient hardening materials. Background technique [0002] The gradient material refers to a non-homogeneous composite that is continuous or quasi-continuously changed in the thickness or length direction of the material thickness or the length direction. Gradient materials have a wide range of applications in the fields of aerospace, mechanical, electromagnetic, biological, nuclear energy and electrical engineering, such as the use of aerospace engine, mechanical engineering, magnetic disk, oscillator, bioengineering in the electromagnet, oscillator, bioengineering, bone, Equipment such as heat electrical converters in joints, nuclear energy and electrical engineering. Titanium alloy is one of the most intensity materials, titanium alloys have a wide range of strength, corrosion resistance, and heat resistance, have extensive appl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18
CPCC22F1/183C22F1/008C22F3/00C22C14/00
Inventor 陈鹏万郭岩松周强刘睿
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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