igb

The results show that in the condition of water cooling rate after 1373K solution treatment , fracture surfaces of the AIM steel exhibit a IGB character , and that is restricted by ESR .

结果表明：在1373K固溶水冷条件下，AIM钢存在低温沿晶脆性，电渣重熔对其具有抑制作用。

After ESR the IGB of the VIM alloy is restricted . The 77K fracture surfaces are mainly composed of dimples with a small amount of cleavage facets and exhibit a tough fracture character .

电渣重熔后其低温沿晶脆性被抑制，77K断口具有韧窝占主导并混有少量准解理小刻面的韧性断裂特征。

The mechanism of ESR restricting the IGB of the VIM alloy is that the total content of the GB-weakening elements such as S , Si and their GB segregation degree are decreased , meanwhile the GB-strengthening elements such as Al , Ca and their GB segregation are introduced .

电渣重熔的作用机理为降低钢中硫等弱化晶界的杂质总量及其晶界偏聚程度的同时，引入铝、钙等强化晶界元素，进而抑制了低温沿晶脆性；