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2022
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01
Several factors affecting the yield strength of precision rolled threaded steel
The internal factors that affect the yield strength of precision rolled deformed steel bars include bond strength, microstructure, microstructure, and atomic properties. If the yield strength of metals is compared with that of ceramics and polymer materials, it can be seen that the influence of bonding is the most fundamental.
The internal factors that affect the yield strength of precision rolled deformed steel bars include bond strength, microstructure, microstructure, and atomic properties. If the yield strength of metals is compared with that of ceramics and polymer materials, it can be seen that the influence of bonding is the most fundamental. From the perspective of microstructure influence, there are four strengthening mechanisms that can affect the yield strength of metal materials, which are: (1) solid solution strengthening; (2) Deformation strengthening; (3) Precipitation strengthening and dispersion strengthening; (4) Grain boundary and subgrain boundary strengthening. Precipitation strengthening and grain refinement strengthening are commonly used methods to improve the yield strength of industrial alloys. Among these strengthening mechanisms, the first three mechanisms not only increase the strength of the material, but also reduce its plasticity. Only by refining grains and subgrains can the strength and plasticity of materials be improved. The external factors that affect the yield strength of precision rolled deformed steel bars include temperature, strain rate, and stress state. As the temperature decreases and the strain rate increases, the yield strength of the material increases, especially for body centered cubic metals which are particularly sensitive to temperature and strain rate, leading to low-temperature embrittlement of the steel. The influence of stress state is also important. Yield strength is an important indicator reflecting the internal properties of materials, but the yield strength values vary under different stress states.
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