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    When hydrogen content in titanium pipe fittings is too high, impact toughness and notch tensile strength will be reduced due to brittleness.Therefore, it is generally stipulated that the hydrogen content in titanium pipe fittings should not be higher than 0.015%.To reduce hydrogen absorption, fingerprints, scratches, grease, and other residues should be cleaned prior to heat treatment.There is no steam in the heat treatment furnace.Vacuum annealing cleaning is needed when the hydrogen content of titanium pipe fittings exceeds the allowable value.

    When the temperature is not higher than 540 degrees, the oxidation film of titanium pipe fittings will not become much thicker, but at a higher heat treatment temperature, the oxidation rate will be accelerated, and the internal diffusion layer of the oxidized material will become a layer of pollution.The oxygen pollution layer has a higher brittleness ratio, which leads to cracks and damage on the surface of parts.The deoxidized layer includes machining, pickling, chemical grinding and other methods.During heat treatment, under the premise of protective heat treatment, shorten the heating time as far as possible.It can also be carried out in vacuum furnace or inert gas furnace. The pollution caused by heating titanium pipe fittings in air furnace should be properly avoided or reduced.

Titanium pipe fitting features:

  1. Corrosion resistance of titanium pipe fittings.Titanium is a very active metal with very low equilibrium potential and strong thermodynamic corrosion tendency.Titanium has good stability and corrosion resistance in oxidation, neutral, weak reduction and other media.

  2. Titanium pipe fitting joint has good heat resistance.It can be used at 600 degrees or high temperature for a long time.

3. Non-magnetic, non-toxic, titanium alloy pipe fitting is a non-magnetic metal that will not be magnetized in a large magnetic field.

4. Low modulus of elasticity, 57% steel.

  5. Inhalation energy.Titanium pipe fitting joint is an active metal, which can react with many elements and compounds at high temperature.

Editor : Carrie Qi (rowlynti@rowlyn.com)