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How to carry out carburizing surface treatment on titanium wire

Today, we will explain how titanium wire undergoes carburizing surface treatment. Titanium wire forms a stable carbide with high 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 small, 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 surrounding areas. Carburization must be carried out under deoxygenation conditions, as the surface layer hardness formed by the commonly used carburizing powder for steel on the surface of carbon monoxide or oxygen-containing carbon monoxide reaches 2700MPa and 8500MPa, and it is easy to peel off.
In contrast, under deoxygenation or decarburization conditions, a thin layer of titanium carbide may form when carburizing 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 condition 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. In contrast, using gas carburizing agents may form a particularly hard and well bonded titanium carbide hardened layer. The hardening expansion formed at temperatures between 950T: and 10201: is between 50fim and. As the layer thickness increases, the titanium carbide layer becomes more brittle and tends to peel off. In order to avoid carbon inclusions invading the titanium carbide layer due to the decomposition of decane, a specified dosage of additive with a volume fraction of approximately 2% decane should be used for gas carburization in inert gas. When using propane additives and methane carburization, lower surface hardness is formed. When the adhesive strength reaches the threshold 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 gas carburizing conditions, but it has to be removed again during vacuum annealing

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