What is the effect of forging on the microstructure and properties of forgings?

The defects of forgings include surface defects and internal defects. Some forging defects will affect the processing quality of subsequent processes, while others will seriously affect the performance of forgings, reduce the service life of the finished parts, and even endanger safety. Therefore, in order to improve the quality of forgings and avoid the defects of forgings, corresponding technological countermeasures should be taken, and the quality control of the whole production process should be strengthened.

The influence of forging on metal structure and performance in forging production, in addition to the shape and size required by the forging, it must also meet the performance requirements of the parts in the process of use, which mainly include: strength pointer, plastic pointer, impact toughness, fatigue strength, fracture toughness and stress corrosion resistance, etc, there are also high temperature instantaneous tensile properties, durability, creep resistance and thermal fatigue properties.

The raw materials for forging are ingots, rolled materials, extruded materials and forging blanks. The rolled, extruded and forged billets are semi-finished products formed after rolling, extrusion and forging of ingots, respectively. Forging production, the use of reasonable process and process parameters, can be through the following aspects to improve the organization and performance of raw materials:

Break the columnar crystal, improve the macro-segregation, the cast tissue into a forged tissue, and under the appropriate temperature and stress conditions, welding internal pores, improve the density of the material.