摘要
本文用ＳＥＭ，ＴＥＭ研究了Ｓｉ对过共析锰钢经９５０℃（＞Ａｃｍ）奥氏体化和５６０℃等温处理后的组织及力学性能的影响结果表明，Ｓｉ提高冲击韧性和延伸率，抑制先共析渗碳体在奥氏体晶界呈连续网状析出，并促进在过共析钢中晶界铁素体的形成．本文重点讨论了含Ｓｉ过共析钢中晶界铁素体的形成机理及其对韧性的影响．
The effects of Si on the grain boundary structure and mechanical properties of hypereutectoid Mn steels austenitized at 950℃ and isothemially transformed at 560℃were studied by means of SEM and TEM. The experimental results showed that the impact toughness and elongation can be improved by Si additions. The observation of microstructure revealed that grain boundary cemetite networks can be inhibited and grain boundary ferrite formed in these hypereutectoid steels by Si addition. The formation mechanism of grain boundary ferrite has also been discussed.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第11期1130-1138,共9页
Acta Metallurgica Sinica
基金
国家经贸委重点技术开发项目
关键词
过共析钢
晶界
铁素体
珠光体
硅
grain boundary ferrite, hypereutetoid steel, pearlite, mechanical property
