一种高钒中碳非调质钢的高周疲劳性能  

High-cycle fatigue property of high vanadium medium-carbon microalloyed steel

作　　者：邵成伟[1,2] 陈思联[2] 赵晓丽[2] 惠卫军[1,2] 曹建春[1] 郝彦英[3] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]钢铁研究总院先进钢铁材料技术国家工程研究中心,北京100081 [3]石家庄钢铁有限责任公司开发部,河北石家庄050031

出　　处：《金属热处理》2014年第2期19-22,共4页Heat Treatment of Metals

基　　金：国家高新技术研究发展计划(863计划)(2013AA031605)

摘　　要：采用旋转弯曲疲劳试验探索了一种高钒(0.28%)中碳铁素体+珠光体型锻态非调质钢37MnSiVS的高周疲劳性能,并与传统低钒(0.12%)非调质钢38MnVS进行了对比。结果表明,37MnSiVS钢的疲劳极限及疲劳极限与抗拉强度的比值均明显高于38MnVS钢及调质钢40Cr,分别为562 MPa和0.614。增加钢中V,所形成的大量细小弥散V(C,N)质点与铁素体间具有特定的位向关系,有显著的析出强化和组织细化作用,使37MnSiVS钢微观组织均匀细小,铁素体硬度明显增加,珠光体与铁素体的显微硬度比减小,从而呈现出十分优异的高周疲劳性能。High-cycle fatigue property of a high vanadium（0.28% ） medium-carbon microalloyed steel 37MnSiVS and traditional medium- carbon microalloyed steel 38MnVS for comparison in as-forged state were studied by using rotating-bending fatigue test. The results show that both fatigue limit and the ratio of fatigue limit to tensile strength of 37MnSiVS steel are significantly higher than those of 38MnVS steel and quenched and tempered 40Cr steel, which are 562 MPa and 0.614, respectively. With the increase of V content, higher quantity of finely distributed V （ C, N） particles were formed, and these V （ C, N） particles have specific orientation relationship with ferrite matrix and thus a significant effect on precipitation strengthening and microstrueture fining. The finer and uniform microstructure and the lower microhardness ratio of pearlite to ferrite of the 37MnSiVS steel become the main reasons for the better high-cycle fatigue properties of 37MnSiVS steel.

关 键 词：高周疲劳性能 高钒中碳非调质钢 钒元素 微观组织 

分 类 号：TG142.4[一般工业技术—材料科学与工程] TG111.8[金属学及工艺—金属材料]