1. Normalization: A heat treatment process in which steel or steel components are heated to an appropriate temperature above the critical point AC3 or ACM for a certain period of time and then cooled in air to obtain a pearlite like structure.
2. Annealing: A heat treatment process in which a hypoeutectoid steel workpiece is heated to 20-40 degrees above AC3, held for a period of time, and then slowly cooled in the furnace (or buried in sand or lime) to below 500 degrees and cooled in air.
3. Solid solution heat treatment: Heating the alloy to a high temperature single-phase zone and maintaining a constant temperature to fully dissolve the excess phase into the solid solution, then rapidly cooling to obtain a supersaturated solid solution.
4. Aging: The phenomenon in which the properties of an alloy change over time when it is placed at room temperature or slightly above room temperature after solution heat treatment or cold plastic deformation.
5. Solid solution treatment: The tungsten steel liner fully dissolves various phases in the alloy, strengthens the solid solution, improves toughness and corrosion resistance, eliminates stress and softening, and facilitates further processing and forming.
6. Time treatment: The tungsten steel liner is heated and insulated at the temperature where the strengthening phase precipitates, allowing the strengthening phase to precipitate and harden, thereby improving its strength.
7. Quenching: A heat treatment process that austenitizes steel and cools it at an appropriate cooling rate, causing the workpiece to undergo unstable structural transformations such as martensite in all or a certain range of its cross-section.