In the introduction of what are the common defects of forging products, we have learned some unknown problems or knowledge, but we are still relatively unfamiliar with the industry where Qingdao Hongtengda Machinery Manufacturing Co., Ltd. is located. Today we will learn about it:
There are several common heat treatment methods for forgings. These processes are interlinked and can not be interrupted.
1. Annealing: The forging is heated to the phase change temperature above, holding for a certain time, and then slowly cooling method.
2. Normalizing: The forging is heated to the phase change temperature above, kept warm for a certain time, and then cooled in air.
3. Quenching: a method of heating forgings to phase change temperature above, holding them for a certain time, and then cooling them rapidly in coolant (water, oil or brine). Quenching can improve the hardness, strength and wear resistance of forgings after quenching.
4. Tempering: Quenching and tempering are usually related. After quenching, the forgings are heated to a temperature below the phase transformation temperature, and then cooled in water, oil or air.
5. Tempering: After quenching, high temperature tempering is called "tempering" which can completely eliminate the internal stress of forgings. What are the common defects of forgings and obtain higher comprehensive mechanical properties?
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The raw materials used for forging are ingots, rolled materials, extruded materials and forged blanks. Rolled, extruded and forged billets are semi-finished products formed by rolling, extrusion and forging of ingots respectively. For ingot casting, the composition of furnace charge, smelting method and forging process are the key links. The rolling, extrusion and forging process is another step to determine the corresponding semi-finished products.
Before entering the forging process, raw materials need to be inspected by size, surface, chemical composition, high-power structure, low-power structure and mechanical properties before they can be put into production.
The chemical composition, high magnification structure, low magnification structure and mechanical properties of raw materials are the basis to ensure the structure and properties of forgings. The size and surface of raw materials directly affect the technological plasticity and forming of forgings. In addition, the Forgability and recrystallization characteristics of raw materials are the basis of determining forging process parameters. Therefore, good raw material is a prerequisite to ensure forgings.
Through the introduction of this article, I believe that you have a certain understanding of "what are the common defects of forging products". If you want to know about forging manufacturers, Qingdao forging manufacturers, Qingdao Hongtengda Machinery Manufacturing Co., Ltd. and other related knowledge, please contact us!
