Fire Resistance Treatment Of Steel Structures
Under normal circumstances, when the ambient temperature exceeds 260 °C, the ultimate strength and yield
point of steel will have a significant downward trend. When the temperature exceeds 600 °C, the strength of
the steel will almost drop to zero, and the plasticity and toughness will be great. It will lose its carrying
capacity, causing the building to collapse or cause other accidents.
Therefore, in order to avoid the deformation to ensure the stability and safety of the steel structure, we must
take effective fire prevention measures to improve the fire resistance of steel materials. It has been found that
in the mixed structure, especially the structure in which the fine particles are dispersed, the dissolution of the
alloying element molybdenum in the solid steel structure can improve the fire resistance of the steel material,
and also the molybdenum and carbon precipitated in the steel material at high temperature. The strength of
the steel material can be strengthened, so the proper addition of some alloying elements such as
molybdenum and copper in the production of the steel material is a treatment method for improving the fire
resistance of the steel material.
At high temperatures, the fine carbides in the steel material can also be stabilized and effectively improve the
high temperature strength of steel. Adding a single molybdenum or niobium to the steel material is not very
effective in improving the high temperature resistance of the steel material. Therefore, the molybdenum and
niobium should be mixed and added to the steel material. The high temperature and fire resistance of steel
materials have good effects. Therefore, in the production of steel, it is necessary to add some alloys properly.
The steel material is strictly used in the construction, so that the fire resistance of the steel structure can be
achieved, and the overall safety performance of the building is ensured.