Due to the rolling strengthening mechanism, the strength of the metal is increased to allow the metal to form a solid alloy with another metal (or non-metal). Solid solution alloys or alloys based on solid solutions (such as carbon steel, etc.) generally have higher strength than pure metals. This phenomenon of increasing solid solution strength by adding solute elements is called solid solution strengthening. Heat-expanded steel pipes are therefore solid-solution strengthened by changing the chemical composition of Jincheng (the microstructure state of ferrite does not change in the crystal lattice), and its enhanced metallographic basis is due to dislocation and heterogeneity of the motion. The result of the interaction between atoms.
For non-alloyed and low-alloyed steels, solid solution strengthening can be regarded as a strengthening mechanism and has nothing to do with the rolling system. The most important alloying elements in steel, Mn.Ni, Cu and P, can form substitutional solid solutions and promote a linear increase in yield strength and resistance. The degree of straight line rise can be determined by the coefficient Ac. The increase in strength Ac is the change in the concentration of the alloying element. In addition to the replacement elements, elements such as C and N form a gap in Fe. The solubility of the solid solution in the iron is very low (when the temperature is 585X: the maximum dissolution X of N, when the temperature is 721T: the solubility of C is 0.018% ), and it drops dramatically with temperature. Therefore, the effects of C and N on the yield strength and tensile strength are small in the solid solution content.