钒含量对PD3钢碳化钒析出的影响  

Effect of Vanadium Content on VC Precipitation in PD3 Steel

作　　者：刘天模[1] 周守则[1] 左汝林[1] 梅东生[2] 邓建辉[2] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044 [2]攀枝花钢铁公司,攀枝花617000

出　　处：《重庆大学学报（自然科学版）》2001年第6期78-81,共4页Journal of Chongqing University

摘　　要：为了弄清钒在珠光体组织转变中的作用和沉淀析出的规律 ,通过电化学萃取分析结合透射电子显微镜观察研究了钒含量对PD3钢中碳化钒析出行为的影响。研究结果表明 :PD3钢的铁素体和渗碳体中固溶钒的饱和溶解度分别为 0 .0 9%和 0 .2 3%左右 ;当钢中钒含量低于 0 .2 1%时 ,钒主要以固溶形式存在 ,只有极少量的碳化钒质点无序析出 ;当钢中钒含量增加 ,超过饱和溶解度后 ,多余的钒则主要以碳化钒的形式析出 ;当钢中钒含量高于 0 .2 1% ,达到 0 .33%时 ,碳化钒将以无序状态和“相间沉淀”两种方式大量析出。In order to identify the affect of vanadium in pearlite transformation and the regularity of the precipitation, the effect of vanadium content on VC precipitation in PD3 steel has been studied by electrochemical extraction and TEM. The results show that the solid solubility limit of vanadium in the ferrite and Fe 3C is 0.09% and 0.23% respectively, that vanadium exist mainly as solid solution and a few VC particles are precipitated in disordered way in case of the vanadium content being below 0.21%, that VC particles are precipitated in excess of saturated solubility, and that a lot of VC particles are precipitated in disordered and 'interphase precipitated' way in case of the vanadium content being above 0.21% and arrive at 0.33%.

关 键 词：碳化钒 相间沉淀 低碳钢 钒 PD3钢 沉淀析出 铁素体 

分 类 号：TG142.21[一般工业技术—材料科学与工程] TG142.1[金属学及工艺—金属材料]