摘要
利用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)和拉伸试验等方法观察和测定了00Cr12Ti铁素体不锈钢退火后的显微组织和力学性能,研究了工艺、组织和性能之间的关系。结果表明:经850℃保温2 min的退火后,00Cr12Ti铁素体不锈钢具有最佳的综合力学性能,屈服强度为230 MPa,抗拉强度为425 MPa,伸长率为35%。退火后00Cr12Ti铁素体不锈钢的组织由无畸变的再结晶铁素体和析出相粒子组成,其中析出相粒子由微米级的复合夹杂物和纳米级的析出物TiC构成。夹杂物破坏了基体的连续性,对其力学性能产生不利的影响。TiC有利于提高了00Cr12Ti铁素体不锈钢的强度,但降低了塑性。
Microstructure and mechanical properties of OOCrl2Ti ferritic stainless steel after annealing were observed arid investigated by means of optical microscope（OM）, scanning electron microscope （SEM） , transmission electron microscope （TEM） and tensile testing, and the relations between technology, microstructure and property were studied. The results show that the optimum mechanical properties are obtained for the steel after annealing at 850℃ for 2 min, with yield strength of 230 MPa, tensile strength of 425 MPa, and elongation of 35%. The microstructure of annealed 00Crl2Ti ferritic stainless steel is composed of recrystallized ferrite grains and the precipitated phase particles of inclusions and TiC precipitations. The inclusions destroy the continuity of matrix, which are harmful to mechanical properties. TiC, as a kind of precipitation, can improve the strength, but reduces the plasticity of the steel.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2013年第10期109-114,共6页
Transactions of Materials and Heat Treatment
基金
国家科技重大专项(2011ZX05016-004)
关键词
铁素体不锈钢
退火
力学性能
显微组织
ferritic stainless steel
annealing
mechanical property
microstructure
