Strength and toughness theory of steel

There are thousands of kinds of steel used in all walks of life. The alloy type, content and performance of each kind of steel have different commodity names. Bremsstrahlung is a crucial mechanical property parameter and technical requirement index, which indicates the ability of materials to absorb impact energy in the process of plastic deformation and fracture. Good ductile materials have the possibility to control the brittle fracture of equipment parts. In terms of materials and metallurgy, the improvement of toughness is of great significance, The increase of toughness value means that the ability to resist impact fracture is enhanced, but the tensile strength, tensile elastic modulus and hardness of materials with high initial value are lower. However, for some materials with strong rigidity, the hardness and strength will be relatively better, but the impact strength and elongation at break performance are not good. Both are important quality standards. It is more complex to improve the strength and obtain the initial property.

The fracture touThe fracture toughness of a material is a characteristic, which is related to the material itself, heat treatment process and processing process. The impact toughness (AK) is a calibration of the embrittlement tendency of a material. Low bremsstrahlung of a material will lead to low toughness value. Improving the initial properties of materials generally lies in: smelting technology and process and added alloy elements; Microstructure, quality and microstructure of heat treatment process.