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Apparatus and method for titanium and titanium alloy surface oxygen-carbon co-cementation

A surface oxygen and titanium alloy technology, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems affecting the performance of titanium alloy substrate, shallow penetration layer, limited improvement of wear resistance, etc.

Active Publication Date: 2008-05-14
西安赛福斯材料防护有限责任公司
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Problems solved by technology

Therefore, judging from the current research results, there are mainly the following problems: 1. In the process of infiltrating gas elements on the surface of titanium alloys, there are "H" elements that can cause hydrogen embrittlement of titanium alloys, which seriously affects the titanium alloy matrix. Performance; 2. In the existing hydrogen-free carburizing technology, since C can form a dense TiC layer on the surface of titanium materials, which blocks the infiltration of subsequent C, the infiltration layer is very shallow and the wear resistance performance is limited.

Method used

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  • Apparatus and method for titanium and titanium alloy surface oxygen-carbon co-cementation

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Embodiment 1

[0019] Put the sample made of industrial titanium material TA1 into the vacuum chamber 3, and the vacuum reaches 5×10 -3 After Pa, the titanium material is heated to 1000°C, and 0.1Pa high-purity CO 2 Gas, gas partial pressure after 200 hours of reaction diffusion treatment, a 1000μm thick oxycarbide layer is formed on the titanium surface, and the surface hardness reaches HV1100.

Embodiment 2

[0021] Put the sample made of Ti6Al4V titanium alloy into the vacuum chamber 3, and the vacuum reaches 5×10 -3 After Pa, the titanium material is heated to 700°C, and 1000Pa high-purity CO 2 After 0.5 hours of reaction diffusion treatment, an oxycarbide layer with a thickness of 30 μm is formed on the surface of the titanium material, and the surface hardness reaches HV700.

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Abstract

The invention discloses a titanium and titanium alloy surface carbonitriding device and a method thereof. In a vacuum state, the temperature of titanium and titanium alloy reaches to 700 DEG C to 1100 DEG C, a high purity CO 2 gas with 0.1 Pa to 1000 Pa of pressure is inlet, and after 0.5 hour to 200 hours of processing, a 30Mum to 1000Mum thick of hard coat is formed at the surface of the titanium alloy; the compositions of the hard coat are the oxide and carbide of titanium, with a hardness reaching to 700 to HV 1100. The inexistence of H element which results in the hydrogen embrittlement of titanium in preparation process realizes the non-hydrogen hardening of the titanium surface.

Description

technical field [0001] The invention belongs to the technical field of metal material surface treatment, and relates to a device and method for titanium surface hardening, in particular to a device and method for oxycarburizing the surface of titanium and titanium alloys. Background technique [0002] Titanium is an active metal. Compared with other metals, titanium has low density, high strength and good corrosion resistance. However, due to its low thermal conductivity and poor wear resistance, it is easy to burn when rubbed. For this reason, people are actively studying the hardening technology of titanium surface to improve its wear resistance. Titanium surface hardening techniques usually include wet plating, carburizing, electrical discharge machining, PVD, CVD, gas nitriding, surfacing and so on. Among these methods, the carburizing process is the most significant in improving wear resistance, but the existing carburizing processes are mainly plasma carburizing and v...

Claims

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Application Information

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IPC IPC(8): C23C8/28
Inventor 李争显杜继红姬寿长王少鹏陈玉斌马秀芬黄春良胡湘银
Owner 西安赛福斯材料防护有限责任公司
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