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Layered titanium-based composite material prepared through solid carburization or ion carburization, and preparation method thereof

A titanium-based composite material, ion carburizing technology, applied in the direction of solid-state diffusion coating, metal layered products, chemical instruments and methods, etc., can solve the problem of poor interlayer bonding of layered titanium-based composite materials and difficulty in controlling the shape of reinforcements and other problems, to achieve the effect of increasing the modulus of elasticity and improving the tensile strength

Pending Publication Date: 2021-12-03
上海交通大学包头材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a layered titanium-based composite material and method prepared by solid-state carburizing or ion carburizing, which utilizes a titanium alloy or titanium-based composite material sheet to form a high-hardness, resistant Wear-resistant, corrosion-resistant modified ceramic reinforcements, and then formed a layered titanium-based composite material by hot-pressing connection, can greatly improve the comprehensive mechanical properties of the titanium-based composite material, to solve the problem of interlayer bonding of the current layered titanium-based composite material Poor, difficult to control the shape of augmentation body and other technical shortcomings

Method used

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  • Layered titanium-based composite material prepared through solid carburization or ion carburization, and preparation method thereof
  • Layered titanium-based composite material prepared through solid carburization or ion carburization, and preparation method thereof
  • Layered titanium-based composite material prepared through solid carburization or ion carburization, and preparation method thereof

Examples

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Embodiment 1

[0056] Step 1. According to the design requirements, use wire cutting to process pure titanium into square sheets of length×width×thickness=50mm×50mm×0.6mm to remove surface pollutants visible to the naked eye. Use 600#, 800#, 1000#, 1200#, 2000# sandpaper to grind and polish the double surface of the titanium sheet, and use acetone or hydrochloric acid solution to clean the double surface of the titanium sheet to ensure that the surface of the raw material is clean, smooth and free of pollutants.

[0057] Step 2, using solid-state carburizing to perform double-sided carburizing and strengthening treatment on the target sheet,

[0058] The solid-state carburizing process is as follows: 1) Wrap the polished and cleaned titanium sheet in chemically pure graphite powder. The content below 30μm accounts for 95%);

[0059] 2) Seal the titanium sheet sample and graphite powder in a quartz tube filled with argon to ensure that both sides of the titanium sheet are completely wrapped ...

Embodiment 2

[0065] Step 1. According to the design requirements, use wire cutting to process pure titanium into a square sheet of length × width × thickness = 50mm × 50mm × 0.6mm to remove surface pollutants visible to the naked eye. Use 600#, 800#, 1000#, 1200 #, 2000# sandpaper to grind and polish the double surface of the titanium sheet, and use acetone or hydrochloric acid solution to clean the double surface of the titanium sheet to ensure that the surface of the raw material is clean, smooth and free of pollutants.

[0066] Step 2, performing double-sided carburizing strengthening treatment on the target sheet by ion carburizing. The ion carburizing process is:

[0067] 1) Put a square titanium sheet of 50mm×50mm into the double glow plasma non-hydrogen carburizing equipment, and set the vacuum degree to 5×10 -3 Pa;

[0068] 2) The titanium sheet sample is used as the cathode, and the high-purity argon gas is used as the carrier gas. Under the pressure of 30MPa, the temperature is...

Embodiment 3

[0074] The difference between this example and Example 1 is that the sample sheet is made of titanium alloy (including α+β titanium alloy and β titanium alloy), and the heating temperature of the quartz tube in step 2 is 1000°C, and the temperature is kept for 24 hours. , each step is exactly the same as in Example 1.

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Abstract

The invention discloses a method for preparing a layered titanium-based composite material through solid carburization or ion carburization. The method comprises the following steps: 1, processing a titanium alloy or titanium-based composite material sheet according to design requirements, and carrying out acid pickling on the surface of the sheet to remove an oxidation film and other pollutants; 2, carrying out double-sided carburizing strengthening treatment on the target sheet by adopting solid carburizing or ion carburizing; 3, alternately stacking and assembling carburized titanium sheets and untreated titanium sheets into a prefabricated body of a layered structure; and 4, placing the prefabricated body of the layered structure in a vacuum hot pressing furnace, achieving good interlayer interface metallurgical bonding through high-temperature pressure connection, and finally cooling the prefabricated body to the room temperature along with the furnace, so as to obtain the layered titanium-based composite material. Through carburizing surface treatment, the titanium surface hardness can be improved to 770 HV from 266 HV, a 150-micron titanium-based composite material infiltrated layer is formed, the infiltrated layer is tightly combined with a base body, and the preparation method is simple, convenient, low in cost, easy to implement and suitable for various marks such as pure titanium, titanium alloy and titanium-based composite materials.

Description

technical field [0001] The invention relates to a method for preparing a layered titanium-based composite material, more specifically, to a layered titanium-based composite material and method prepared by solid-state carburizing or ion carburizing. Background technique [0002] In-situ self-generated titanium-based composites have excellent mechanical properties such as high specific strength, high specific stiffness and high specific modulus, and are widely used in aerospace and weapons fields. Specifically, after the in-situ introduction of reinforcements in the titanium alloy matrix, not only can the microstructure be refined, but at the same time, due to the good combination with the matrix interface, it can effectively bear stress when loaded and hinder the movement of dislocations, thereby obtaining high Strong, high modulus titanium matrix composite. However, many studies at home and abroad have found that the tensile strength of composites shows a trend of first inc...

Claims

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Application Information

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IPC IPC(8): B32B15/01B32B33/00B32B37/06B32B38/00C23C8/36C23C8/64
CPCB32B15/01B32B33/00B32B37/06B32B38/00C23C8/36C23C8/64Y02P10/25
Inventor 韩远飞吕维洁段宏强黄光法毛建伟
Owner 上海交通大学包头材料研究院