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A kind of tantalum/steel bimetal composite material and preparation method thereof

A composite material and bimetallic technology, which is applied in metal material coating process, vacuum evaporation plating, coating, etc., can solve the problems of low bonding strength and low overall material strength, improve interface performance, eliminate residual stress, The effect of accelerated diffusion

Active Publication Date: 2021-09-07
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] An object of the present invention is to provide a tantalum / steel bimetallic composite material to solve the problems of low bonding strength and low overall strength of the existing tantalum / steel bimetallic composite material

Method used

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  • A kind of tantalum/steel bimetal composite material and preparation method thereof
  • A kind of tantalum/steel bimetal composite material and preparation method thereof

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preparation example Construction

[0034] A kind of preparation method of tantalum / steel bimetallic composite material of the present invention comprises the following steps:

[0035] Step 1: Prepare a steel substrate and a tantalum target. The carbon content of the steel substrate is 0.5-1.0wt%, and the tantalum content of the tantalum target is Ta≥99.99wt%. The steel substrate is alloy steel, carbon steel or tool steel.

[0036] Step 2: Grinding and polishing the surface of the steel substrate so that the surface roughness of the steel substrate is 0.01-0.04 μm, then putting the steel substrate into ethanol for ultrasonic cleaning, and then cleaning and drying;

[0037] Step 3: Use vacuum magnetron sputtering equipment to sputter the tantalum target on the surface of the steel substrate to make a tantalum-steel composite material;

[0038] The specific process of step 3 is:

[0039] Step 3.1: Fix the steel substrate on the sputtering platform of the vacuum magnetron sputtering equipment, then put the tantalu...

Embodiment 1

[0047] Adopt 55CrNi2MoV alloy steel to prepare tantalum / steel bimetallic composite material, comprise the following steps:

[0048] Step 1: prepare a steel substrate and a tantalum target, the steel substrate is 55CrNi2MoV alloy steel, and the carbon content in it is 0.5wt%; the tantalum content of the tantalum target is Ta≥99.99wt%, the diameter is 40mm, and the thickness is 5.5mm;

[0049] Step 2: Grinding and polishing the surface of the steel substrate so that the surface roughness of the steel substrate is 0.02 μm, then putting the steel substrate into ethanol for ultrasonic cleaning, and then cleaning and drying;

[0050] Step 3: Fix the steel substrate on the sputtering platform of the vacuum magnetron sputtering equipment, then put the tantalum target into the magnetron sputtering chamber, ensure that the distance between the surface of the steel substrate and the tantalum target is 60mm, and turn off the magnetron sputtering chamber;

[0051] Vacuumize the magnetron ...

Embodiment 2

[0058] Adopt 60 carbon steel to prepare tantalum / steel bimetallic composite material, comprise the following steps:

[0059] Step 1: Prepare a steel substrate and a tantalum target. The steel substrate is 60 carbon steel with a carbon content of 0.65wt%; the tantalum target has a tantalum content Ta≥99.99wt%, a diameter of 30mm, and a thickness of 5mm;

[0060] Step 2: Grinding and polishing the surface of the steel substrate so that the surface roughness of the steel substrate is 0.01 μm, then putting the steel substrate into ethanol for ultrasonic cleaning, and then cleaning and drying;

[0061] Step 3: Fix the steel substrate on the sputtering platform of the vacuum magnetron sputtering equipment, then put the tantalum target into the magnetron sputtering chamber, ensure that the distance between the surface of the steel substrate and the tantalum target is 50mm, and turn off the magnetron sputtering chamber;

[0062] Vacuumize the magnetron sputtering chamber so that the ...

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Abstract

The invention discloses a tantalum / steel bimetal composite material, which comprises a steel substrate and a tantalum coating on the surface of the steel substrate, tantalum carbide particles are distributed between the steel substrate and the tantalum coating, and the carbon content in the steel substrate is 0.5-1.0 % by weight, the thickness of the tantalum coating is 20 μm to 60 μm. The invention also discloses a preparation method of the tantalum / steel bimetallic composite material. The tantalum / steel bimetallic composite material is prepared by using a steel substrate with a relatively high carbon content, and the tantalum and the steel substrate are combined by vacuum magnetron sputtering. Then, the composite annealing treatment of "electric field + temperature field" at 780-820°C on the tantalum-steel composite material can effectively eliminate the residual stress generated during the deposition process of the Ta coating, accelerate the diffusion of C atoms in the steel matrix, and promote the formation of TaC nails. The in-situ formation of the bundled phase improves the interface properties and effectively increases the interface bonding strength.

Description

technical field [0001] The invention belongs to the technical field of bimetallic composite materials, and relates to a tantalum / steel bimetallic composite material and a preparation method thereof. Background technique [0002] Tantalum is a silver-white rare high-melting point metal with good ductility, stable chemical properties and strong corrosion resistance. There are two crystal forms of tantalum, namely body-centered cubic structure α phase and tetragonal structure β phase (metastable phase, β-Ta→α-Ta phase transition occurs above 750°C). Among them, α-Ta has good plastic toughness, good matching with steel, good coating adhesion, and is not easy to peel off; while β-Ta is hard and brittle, has poor thermal stability, and has almost no practical application value. It is in the range of 750-1000 °C Can be converted into α-Ta. Although metal tantalum has many excellent properties, because it has few resources in nature and often coexists with metal niobium in niobium...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/35C23C14/16C23C14/58
CPCC23C14/165C23C14/35C23C14/5806
Inventor 钟黎声白海强魏俊哲许云华彭建洪朱建雷
Owner XIAN UNIV OF TECH