一引言通常認为再结晶现象是一种成核成长的过程。很多实验的结果都说明了这一点。亚尔克尔等在1938年指出凡具有细晶粒的金属受到小的塑性应变後再退火,在一定條件下可以不经过成核过程而直接从原来旧晶粒上成长。这种成长和普通的成长不同,他是在较低的温度下在有应变區中实现的;正规的成长是在高温下,由於晶粒间界的表面涨力所推动的。1948年勃克和蕭用晶粒为O.15毫米大的黄铜样品泠加工5—15％,在分段退火中也看到在成核前 An introduction It is generally accepted that recrystallization is a process of nucleation and growth. Many experimental results illustrate this point. Yarkel et al. (1938) pointed out that any metal with fine grain is annealed by a small plastic strain and can grow directly from the old grain under certain conditions without nucleation. This growth, unlike ordinary growth, was achieved in a strained zone at lower temperatures; regular growth was promoted at high temperatures due to the surface tension of the grain boundaries. In 1948, Boke and Xiao used 5-15% of the copper for the O.15mm large grain size, and in the segmented annealing, it was also seen that before the nucleation