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低合金钢的回火脆性(化)现象是由于P、Sn、Sb、As等微量杂质在钢中晶界处偏析引起的,这已被近几年来的分析技术所证明。另外,根据Guttmann的多元系平衡偏析模拟,使定量地研究共存合金元素的作用成为可能。特别是最近,在晶界处偏析的杂质存在状态和晶界强度相互关系的研究也开始了。在不远的将来,对此问题的全面理解将成为现实。关于这个问题,Cabral及其同事比较早地提出来了(1965)。在此之后,由Mc-Mahon及其同事使用HY-130、AISI4340等高强度钢,对两种脆性现象的关系继续进行了探索。另外。在日本,以高温、
The temper brittleness of low-alloy steels is due to the segregation of trace impurities such as P, Sn, Sb, As in the grain boundaries of steel, which has been proved by the analytical techniques in recent years. In addition, according to Guttmann’s multicomponent equilibrium segregation simulation, it is possible to quantitatively study the effect of coexisting alloying elements. In particular, research on the relationship between the state of existence of segregated grains at the grain boundaries and the grain boundary strength has recently started. In the near future, a full understanding of this issue will become a reality. About this issue, Cabral and colleagues put forward earlier (1965). Since then, the relationship between the two types of brittleness has been explored by Mc-Mahon and colleagues using high strength steels such as HY-130 and AISI4340. In addition. In Japan, with high temperature,