titanium tube is removed by heat treatment of other substances titanium sponge powder

When excessive hydrogen content of titanium tubes , become brittle leaving notched impact toughness and tensile

strength of a sharp decline in Sunrui titanium material the general provisions of the hydrogen content of titanium tubes shall not exceed

0.015% . To reduce the amount of hydrogen absorption , parts should be removed prior to heat treatment fingerprints,

rolling mill mark , grease and other residue , no vapor heat treatment furnace atmosphere . If the hydrogen content

of titanium tube exceeds the allowable value , must be removed by vacuum annealing . Dehydrogenase is generally

vacuum annealing at 538-760 ℃, maintained under a pressure lower than 0.066Pa 2-4h.
    When the temperature does not exceed 540 ℃ , the titanium oxide film surface of the tube does not significantly

thickened , however, the heat treatment at higher temperature (760 ℃ above ) , the oxidation rate is rapidly

increased, and the oxygen expansion inside material to form a diffusion layer - contaminated layers. Oxygen

contamination layer has a high ratio sunrui titanium casting factory leads to brittle parts of the surface cracks and damage. Removing contaminated

layers of oxygen with mechanical processing methods ( such as room cut , sandblasted , etc. ) , or pickling,

chemical milling and other chemical methods , in the heat treatment , the heating time should be guaranteed under

the premise of the heat treatment is shortened as much as possible meteorite , but also in performed in a vacuum

furnace or an inert gas (argon , nitrogen, etc. ) furnace . Application of appropriate Xu Min can avoid or reduce

contamination titanium tube sunrui Titanium precision castings furnace parts heating in air generated .