A device for titanium metal oxycarburizing

Abstract

The invention relates to a device for titanium metal oxycarburization, comprising a vacuum chamber, an air inlet and a pressure gauge are arranged above the vacuum chamber, a pump group is arranged below the vacuum chamber, and a heating element is also arranged in the vacuum chamber The inner wall of the vacuum chamber is coiled with an air intake preheating pipe connected to the air inlet, and the air intake preheating pipe circles downward from the air inlet above the vacuum chamber around the inner wall of the vacuum chamber, and the air intake preheating pipe Going around to the bottom of the vacuum chamber, the air outlet of the intake preheating pipe is set under the material rack, titanium parts are placed in the middle of the material rack, and pure graphite is placed on both sides. The present invention adopts the method of preheating the intake carbon dioxide, and the preheating treatment is carried out on the rear side of the heating element, which has almost no influence on the temperature of the main working area, and the preheating gas can better react with pure graphite after entering the vacuum chamber , thus generating stable carbon monoxide to react with titanium metal, effectively ensuring product quality.

Description

technical field [0001] The invention belongs to the technical field of metal material surface treatment, and relates to a titanium surface hardening device, in particular to a device for titanium metal oxycarburizing. 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 vacuum carburizing, and carbon atoms are produced by hyd...

AI Technical Summary

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.

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