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2022.09.19

About carburization inspection of forgings

Carburizing treatment is one of the earliest and widely used surface chemical heat treatment processes. It infiltrates carbon into the surface of the steel to increase the carbon content on the surface of the forging. Through quenching, the surface layer can obtain high hardness, while the core part can obtain higher hardness. Low ones have better tissue toughness.

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2022.09.19

About the low-frequency inspection of raw materials for forgings

Low-magnification inspection of forging raw materials. The acid leaching test is a test method to show the low structure of steel materials. In the low-magnification inspection of steel, acid leaching is one of the commonly used methods, mainly because the acid leaching test equipment is simple, easy to operate, and can clearly show various defect structures in steel materials, such as cracks, inclusions, etc. , porosity, segregation and porosity, etc., especially for forgings.

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2022.09.19

What are the methods of forging forgings?

Large-scale forgings are used in key parts of large-scale machinery, so the quality requirements for large-scale forgings are very high in the production process. According to the forming mechanism, the forging of large forgings can be divided into free forging, die forging, ring rolling and special forging.

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2022.09.19

Heat treatment of alloy structural steel forgings

Heat treatment of alloy structural steel forgings. The carbon content of alloy quenched and tempered steel is in the middle carbon range. For steel with less alloy content, the structure after normalizing is mostly pearlite (called pearlitic steel alloy); for steel with more content, it is martensitic structure. (called martensitic steel). In order to facilitate cutting and improve the coarse-grained structure and banded structure caused by improper thermal processing in steel, preparatory heat treatment is required first.

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2022.09.19

Selection of raw materials when forging forgings

The recrystallization temperature of steel is about 460°C, but 800°C is generally used as the dividing line, and the temperature above 800°C is hot forging; between 300 and 800°C, it is called warm forging or semi-hot forging, and forging is based on the blank during processing. The temperature can be divided into cold forging and hot forging.

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2022.09.19

About the plating of forged surfaces

The metal surfacing technology is to select the surfacing metal with high red hardness, high hardness and high wear resistance, and surfacing alloy steel with a certain thickness on the parts that are prone to fatigue deformation of the forging. Therefore, suitable electrodes should be selected according to the different requirements of forgings during surfacing welding, such as manganese-molybdenum steel, manganese-chromium-silicon and other electrodes.

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