硼有加速珠光体成长率的作用，无论在亚共析或共析钢中皆有同样的现象产生。
It was found by experiments thatboron increased the growth rate of pearlite, both in hypoeutectoid and eutectoid steels.
结果表明，对于亚共析钢，在中温区变形、保温后可使先共析铁素体和珠光体组织大大细化，显著改善钢中铁素体和珠光体的分布状况；
The results show that, in hypoeutectoid steels, deformation at medium temperature may fine the structure and improve the distribution of ferrite and pearlite greatly;
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