Titanium wire carburizing surface treatment

Titanium wire forms a stable carbide with higher hardness with carbon. The growth of the carbonized layer between titanium and carbon is determined by the diffusion rate of titanium in the carbonized layer.
The solubility of carbon in titanium is small, totaling 0.3% at 850C, and about 0.1% at 600C. Since the solubility of carbon in titanium is small, it basically only passes through the titanium carbide layer and its lower fork domain. Deposit a layer to achieve surface hardening. Carburizing must be carried out under the condition of removing oxygen, because the hardness of the surface layer formed when the powder commonly used for carburizing steel faces the surface of carbon monoxide or oxygen-containing carbon monoxide reaches 2700MPa and 8500MPa, and it is easy to peel off.
In contrast, a thin layer of titanium carbide may form during carburization in charcoal under deoxidized or decarburized conditions. 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 the depth of the nitrided layer when nitriding with nitrogen under the same conditions. In oxygen-enriched conditions it must be taken into account that the absorption of oxygen affects the depth of hardening. Only under the condition of very thin layer thickness, it is possible to form sufficient adhesion strength by infiltrating carbon powder in vacuum or argon-methane atmosphere. In contrast, using gas carburizing agent may form a particularly hard and good adhesion. Hardened layer of titanium carbide. At the same time, the hardening developed at temperatures between 950°F and 10201°F is between 50fim and 50fim. As the layer thickness increases, the titanium carbide layer becomes more brittle and tends to peel off. In order to avoid carbon inclusions from invading the titanium carbide layer due to the decomposition of rayane, a volume fraction of approximately 2% rayane should be adopted. Dosing additives for gas carburizing in inert gas. Lower surface hardness results when carburizing with methane using propane additives. When the bonding strength reaches 900kPa and gas carburizing propane is used, although the measured thickness of the hardened layer is very thin, it has the best wear resistance. Hydrogen is absorbed using gaseous carburizing agents, but has to be removed again during vacuum annealing.