Titanium wire forms a stable carbide with higher hardness with carbon. The growth of the carbonization layer between titanium and carbon is determined by the diffusion rate of titanium in the carbonization layer.

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, and is easily peeled off.

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, it is necessary to consider the influence of oxygen absorption on the hardening depth. 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.