摘要
作者通过系列冲击实验和透射电镜,研究了高温形变遗传热处理60Si2Mn钢的位错结构遗传性与回火脆化倾向。结果表明,遗传处理后,试样仍然保留着稳定的位错网络和平行位错偶极子结构。它显示出遗传位错具有相当的稳定性。并且通过遗传位错扩散管道,促进了脆性杂质P原子向晶界偏聚,提高了材料的回火脆化倾向。
Supported by a series of impact experiments and TEM observations, a study is made on the steel 60Si2Mn with a history of high temperature deformative treatment in connection with the dislocation inheritance and the tendency to temper brittleness The observed results show that long after the high temperature hereditary treatment, dislocation network and parallel dislocation dipole structure in the sample are found to survive with a considerable stability. phosphous atoms, as impurities, which account for the brittleness, are thus actuated to segregate toward the grain boundaries and add to the tendency of the sample to temper brittleness by diffusing through their 'diffusion channels'.
