Can the \"fires\" of post-weld heat treatment be counted as four types of fire (normalizing, tempering, quenching, annealing)?

These four types of fire are not the same thing; are you studying mechanics?

Post-weld heat treatment (stress relief) is similar to annealing, right?

The four types of heating have different temperatures, cooling rates, and effects: 1. Stress-relief annealing: The workpiece is heated below AC1 (usually to a temperature of 500–650 degrees), held at that temperature for a sufficient period of time, then cooled slowly in the furnace to a temperature of 200–300 degrees, after which it is taken out of the furnace for air cooling； Function: .Relieve stress ； 2. Normalizing: Heat the workpiece to a temperature 30-50 degrees above AC3, hold it at that temperature for sufficient time before removing it from the furnace and cooling it in air ； Function ； . Eliminate stress, refine the microstructure ； 3. Quenching: Heat the workpiece to a temperature 30–50 degrees above AC3, hold it at that temperature for a sufficient period of time, and then cool it rapidly (at a cooling rate greater than the critical rate) to transform austenite into martensite ； Function: Increases hardness and wear resistance ； 4. Tempering: Heat the quenched workpiece to a temperature below AC1, hold it at that temperature for a sufficient period of time, and then cool it at an appropriate rate ； Function: Stabilize tissues, relieve stress, and improve mechanical properties.

The “heat” treatment after welding is tempering, which stabilizes the microstructure, eliminates stresses, and improves mechanical properties

Post-weld heat treatment is a combination of several heat treatment methods, primarily used to remove stress or improve the properties of the material. It differs from the traditional definition of heat treatment.

The post-weld heat treatment should be consistent with the condition in which the workpiece is delivered. Generally, post-weld heat treatment includes three types: AW, SR (stress relief/annealing), and N normalizing. AW refers to the situation where the workpiece, after welding, is not above the AC3 line, and natural cooling is sufficient. In the SR case, there are local stresses, changes in grain structure, and alterations in mechanical properties after welding; therefore, it is necessary to keep the workpiece above the AC3 line to facilitate grain growth to the desired level and achieve grain homogenization, while also eliminating residual stresses in the workpiece. For N normalizing, it is essential to go above the AC1 line in order to promote grain refinement and uniformity, thereby achieving the required mechanical properties as well as toughness and ductility. I’m not sure if this answer is correct

I think the 10th floor should work

The heat treatment after welding should probably be considered part of the tempering process.