The growth velocity for recrystallized grain is proportional to the driving force of recrystallization, which is determined by the grainboundary energy and dislocation density.
再结晶晶粒的生长速度与再结晶驱动力成正比，再结晶驱动力取决于晶界能和位错密度。
2
The relationship between the boron hardenability factor and the equilibrium segregation of boron tograinboundary, the composition of steel, the austenitizing temperature, grain size was studied.
The total quantity of corrosion surface defect is decreased due to the decrease of grainboundary energy with the increase of grain size and the atmospheric corrosion resistance is increased.