摘要
在2Cr13不锈钢中引入TiC颗粒后,室温强度有大幅提高,但塑性和冲击韧性却发生了较大幅度的下降,原位合成的TiC颗粒,尺寸较大且有轻微团聚现象,导致了在拉伸和冲击过程中颗粒易破碎,断裂机制是以TiC增强体失效为上;对TiC强化2Cr13进行电渣重熔后,综合性能得到了改善,TiC颗粒变小且分布变均匀,在拉伸和冲击过程中颗粒不易破碎,断裂机制是以TiC与基体的界面失效为主。
Tensile properties of TiC reinforced 2Cr13 steel prepared by in situ reaction and electroslag remelting have been measured. Experimental results showed that the addittion of TiC particles into 2Cr13 steel resulted in significant increase in tensile strength and remarkable decrease in ductility as well as impact toughness of the steel. SEM （scanning electron micrograph） observations revealed slight aggregation of TiC particles with large size in the TiC reinforced 2Cr13 steel and the fracture of the steel was mainly caused by the break of TiC particles. Electroslag remelting of the TiC reinforced 2Cr13 steel can make TiC particles significantly refined, their distribution uniform in the matrix, and the combined properties improved. Therefore, cracking of the particles was not easy to occur and fracture of the steel was basically caused by cracking of the interfaces between particles and matrix.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第6期745-750,共6页
Acta Metallurgica Sinica
基金
国家高技术研究发展计划资助项目2007AA032508
关键词
TIC
不锈钢
电渣重熔
拉伸力学性能
TiC, stainless steel, electroslag remelting, tensile property
