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导出了含V低合金钢的屈服强度增量△σp与桥出相倾粒平均直径dp、颗粒体积分数fv之间的数值关系式．在一定温度范围内，当等温湿度降低时，dp是单调减少的，△σp是单调增加的，而fV在PTT曲线的鼻部730℃附近最大．在低合金钢的成份设计时，就析出强化而言应考虑析出相的理想化学配比式和析出相的脱溶一溶解曲线关系．
The numerical relation between the yield strength increment △ σp and the average diameter dp of the precipitated phase and the volume fraction of particles fv is deduced. The dp decreases monotonically over a range of temperatures when the isothermal temperature decreases, Δσp increases monotonically, and fV peaks around 730 ° C at the nose of the PTT curve. In the compositional design of low alloy steels, the relationship between the ideal chemical composition of precipitated phases and the desolvation-dissolution curve of the precipitated phase should be taken into account in precipitation strengthening.