【摘要】 本文用Auger能谱仪较详细地研究了S,P等杂质元素在高速钢铸态晶界和奥氏体晶界上的偏聚情况与稀土元素的净化作用。钢中的S,P含量不同,在晶界上偏聚的量也不同。加入稀土元素后,可以使偏聚在晶界上的S,P减少,并观察到了稀土能使晶界上的硫消失.文中对S,P在晶界上偏聚和稀土元素净化作用的原因进行了讨论。更多还原

【Abstract】 The segregation of the impurities, e. g. S, P, along grain boundaries of as-cast structure and of austenite in the high speed steels as well as the cleaning action of RE elements have been studied by AES. It was found that the more S and P the steels contain, the more their segregation occurs. The segregation becomes remarkably improved by the addition of RE elements, and the enrichment of S at grain boundary goes so far as to vanish when the RE added up to 0.05-0.08%. Some discussion on the segregation and the cleaning action have been also made.更多还原