摘要
研究了Mo对新型空冷低碳Mn-Si-Cr系列贝氏体钢CCT曲线的影响。针对低硅和高硅情况,研究了少量Mo对新型空冷低碳Mn-Si-Cr系贝氏体钢不同温度回火后组织和性能的影响。结果表明,试验钢中添加少量Mo元素能有效延迟CCT曲线高温先共析铁素体转变,降低Ms点,但对中温转变影响较小。加入少量Mo对组织影响不明显,但含Mo钢的回火脆性曲线向右推移,峰谷值出现的回火温度升高,在高Si钢中更为突出,将回火脆性温度提高了100℃左右。到高温回火阶段,无Mo钢的冲击韧性高于含Mo钢。
The effect of Mo on CCT curve of new-typed air-cooled low carbon Mn-Si-Cr series bainitic steels was investigated. Furthermore, to the steels with high and low Si content, a small amount of Mo＇s influence on tempered microstructure and properties was studied. The results show that a small quantity of Mo can effectively delay pre-eutectoid ferrite transformation and decrease Ms temperature, but has little influence on medium-temperature transformation. The microstructure is hardly affected by addition of Mo either. While Mo addition in a small quantity would postpone onset temperature of tempering embrittlement, especially in high-silicon-contained steels,with the temperature of temper embrittlement rising about 100℃. In addition ,after high temperature tempering,the impact energy of steels with Mo is lower than that of steels without Mo.
出处
《金属热处理》
EI
CAS
CSCD
北大核心
2007年第9期48-51,共4页
Heat Treatment of Metals
基金
国家重点基础研究(973)项目(2004CB619105)
关键词
贝氏体钢
MO
CCT曲线
组织
性能
bainitic steel
molybdenum
CCT curve
microstructure
mechanical properties
