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Titanium alloy wire surface carburization treatment process and precautions!
Titanium alloy wire surface carburization treatment process

The solubility of carbon in titanium is low, reaching a total of 0.3% at 850X, while it drops to approximately 0.1% at 600C. Due to the low solubility of carbon in titanium, surface hardening can only be achieved through the deposition layer of the titanium carbide layer and its lower domains. Carburization must be carried out under deoxygenation conditions, as the surface layer formed by the commonly used carburizing powder for steel on the surface of carbon monoxide or oxygen-containing carbon monoxide has a hardness of 2700MPa and 8500MPa, making it easy to peel off.

Titanium and titanium alloys have many characteristics such as light weight, high strength, and corrosion resistance. Titanium and its alloys not only have very important applications in aviation and aerospace industries, but also have begun to be widely used in many civil industrial sectors such as chemical, petroleum, light industry, power generation, metallurgy, etc. Another notable feature of titanium is its strong corrosion resistance, which is due to its strong affinity for oxygen and the ability to form a dense oxide film on its surface, which can protect titanium from medium corrosion. Titanium metal can form a passive oxide film on the surface in most aqueous solutions. Therefore, titanium has good stability in acidic, alkaline, neutral saline solutions and oxidizing media, but in a certain medium, when the oxide film on the surface of titanium can be continuously dissolved, titanium will be corroded in this medium. For example, in hydrofluoric acid, concentrated hydrochloric acid, flowing acid, and phosphoric acid, titanium is corroded due to the dissolution of the oxide film on the surface of the solution. If oxidants or certain metal ions are added to these solutions, the oxide film on the titanium surface will be protected. The following are the relevant processes and precautions for surface treatment of titanium alloy wires shared by professional manufacturers of Baoji titanium wire:

In contrast, under deoxygenation or decarburization conditions, a thin layer of titanium carbide may be formed during carburization in charcoal. The hardness of this layer is 32OUOMPa, which is consistent with the hardness of titanium carbide. The depth of the carburized layer is roughly greater than that of the nitrided layer when nitriding under the same conditions. Under the conditions of oxygen enrichment, the influence of oxygen absorption on the hardening depth must be considered. Only under very thin layer thickness conditions can carbon powder be infiltrated into real air or argon methane atmosphere to form sufficient adhesion strength. Compared to this, using gas carburizing agents may form a particularly hard and well adhesive titanium carbide hardened layer. The hardening spread formed at temperatures between 950T: and 10201: is between 50fim and. As the thickness of the layer increases, the titanium carbide layer becomes more brittle and tends to peel off. In order to avoid the inclusion of carbon entering the titanium carbide layer due to the decomposition of reathane, a specified dosage of additive with a volume fraction of approximately 2% reathane should be used for gas carburization in inert gas. When propane additives are used and methane is used for carburization, lower surface hardness is formed. When the adhesive strength reaches a value of 0kPa and propane gas carburized is used, although the measured thickness of the hardened layer is very thin, it has the best wear resistance. Hydrogen is absorbed under the condition of using gas type carburizing agents, but it has to be removed again during vacuum annealing.

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