摘要
对含微量镓(0.004～0.055 wt％)低碳钢(～0.13wt％C)在各种处理状态下的低温系列冲击实验、光学金相和透射扫描电镜观察、成分微区分析,发现微量镓能在一定程度上细化组织和阻碍磷向晶界偏聚,从而明显提高钢的低温冲击韧性。就镓和磷在钢中的化学和弹性交互作用对实验结果作了分析。
Low carbon steels (～0.13 wt-%C), containing small amounts of gallium (0.004--0.055 wt-%Ga), are studied by means of impact tests at a series of low temperatures, observation of structurewith optical and transmission electron microscope, and in situ X-ray energy dispensive analyses.The results, combining with the calculation of chemical and elastic interaction between galliumand phosphorus in steel, show that small amounts of gallium can, to a certain extent, hinder theintergranular segregation of phosphorus and fine grains in steel. Therefore the impact embrittle-ment transition temperature of the steel is obviously lowered and the Iow temperature toughnessis improved.
出处
《钢铁》
CAS
CSCD
北大核心
1989年第8期38-43,共6页
Iron and Steel
基金
中国科学院科学基金
