What are the heat treatment methods for precision aluminum tubes?

Source：en Release date： 2022-05-17

Information summary：The precision aluminum tube is heated by different heat sources, and cooled when the surface temperature of the workpiece reaches above the critical point, so that the surface layer obtains a hardened structure while the core still maintains the original structure. The most common industrial applications are induction heating and flame heating surface quenching

1. Surface quenching
          heats the precision aluminum tube through different heat sources, and cools it when the surface temperature of the workpiece reaches above the critical point, so that the surface layer obtains a hardened structure while the core still maintains the original structure. The most common industrial applications are induction heating and flame heating surface quenching.
          2. Chemical heat treatment
          The product is heated and kept warm in a medium containing active elements, so that the active atoms in the medium penetrate into the surface of the product or form a covering layer of a certain compound to change the structure and chemical composition of the surface layer, so that the surface of the workpiece Has mechanical or physicochemical properties.
          3. Contact resistance heating and quenching
          : A voltage of less than 5 volts is applied to the precision steel pipe through the electrode, and a large current flows through the contact between the electrode and it, and a large amount of resistance heat is generated, so that the surface is heated to the quenching temperature, and then the electrode is heated to the quenching temperature. Removed, the heat is introduced into the product and the surface is cooled, that is, the purpose of quenching is obtained.
          4. Electrolytic heating and quenching
          is placed in the electrolyte of acid, alkali or salt aqueous solution, the product is connected to the cathode, and the electrolytic cell is connected to the anode. After the direct current is turned on, the electrolyte is electrolyzed, oxygen is released on the anode, and hydrogen is released on the precision steel pipe. Hydrogen forms a gas film around the product and becomes a resistor body to generate heat, heat the surface to the quenching temperature, and then cut off the power, the gas film disappears, and the electrolyte becomes a quenching medium, which cools and hardens the surface.

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