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Introduction to the four common ways of forging residual heat treatment

General forging heat treatment methods: forging waste heat quenching, forging parts heat and humidity conditioning, forging waste heat normalizing and forging waste heat annealing.

1. Forging waste heat quenching: deformation occurs during the forging process, the final forging is finished, the cooling method according to different materials pre-cooling or isothermal to the temperature we need is rapidly cooled by water or oil to obtain the quenched martensite-based structure. It is the residual heat quenching.

2. Forging heat recovery: the workpiece blank is placed in a heating furnace to be heated to forging temperature, and then forged after heat preservation. After the final forging, according to different materials, pre-cooling or isothermal to the quenching temperature we need, select the corresponding The quenching medium is quenched and cooled to obtain a structure mainly composed of quenched martensite. Then high temperature tempering is performed to get the mechanical properties we need. The heat and humidity of the forgings can improve the tensile strength, yield strength, impact fatigue resistance, plasticity, fracture toughness, and reduce the temper brittleness of the alloy structural steel and reduce the cost.

3. Forging waste heat normalizing: deformation occurs during the forging process, the final forging is finished, according to different materials pre-cooling or isothermal to our desired temperature, then choose to cool in the air to obtain the Soxite-based structure, which is the residual heat fire.

4. Forging waste heat annealing: deformation occurs during forging, the final forging is finished, according to different materials pre-cooling or isothermal to our desired temperature, then choose to cool in the furnace or slow cooling pit, get distributed on the ferrite matrix The flaky or spheroidal carbide-based structure is a waste heat anneal.

Forging residual heat treatment refers to the heat treatment after high temperature deformation, that is, the workpiece blank is placed in a heating furnace and heated to the forging temperature. After the heat preservation, the workpiece billet undergoes austenitizing transformation, and then deformation occurs during the forging process, and the final forging is performed. After the end, according to different materials pre-cooling or isothermal to the temperature we need, according to different process requirements, select the corresponding cooling method to obtain the required tissue and mechanical properties.