硼对正火态Fe-0.4C-B合金磨粒磨损性能的影响  

Influence of boron on grinding abrasion properties of normalizing Fe-0.4C-B alloy

作　　者：蔡云秀[1] 李飞[2] 何正员[3] 

机构地区：[1]云南机电职业技术学院,云南昆明650000 [2]昆明理工大学城市学院,云南昆明650093 [3]昆明理工大学材料学院,云南昆明650093

出　　处：《锻压装备与制造技术》2015年第4期93-96,共4页China Metalforming Equipment & Manufacturing Technology

基　　金：国家自然科学基金资助项目(50701020);云南省应用基础研究计划资助项目(2007E034M);云南省教育厅重点科研基金资助项目(07Z11437)

摘　　要：借助光学显微镜、扫描电镜、X射线衍射分析等手段,研究了碳含量一定的基础上,硼对1050℃正火Fe-0.4C-B合金的组织及磨粒磨损性能的影响规律。结果表明:1050℃正火Fe-0.4C-B合金组织由珠光体+铁素体+含硼碳化物Fe23(C,B)6和Fe2B组成,正火处理没有改变含硼碳化物Fe23(C,B)6在初生奥氏体枝晶间连续网状分布;随着硼含量的增加,1050℃正火Fe-0.4C-B合金试样磨损率先降低后升高,耐磨性先升高后降低,在碳含量0.44%、硼含量2.95%时,耐磨性和高铬铸铁相当。On the basis of identical carbon content, the influence law of boron content on structures and grinding abrasion properties of 1050℃normalizing Fe-0.4C-B alloy has been studied by means of optical microscopy, scanning electron microscopy （SEM） and x-ray diffraction （XRD）. The results show that the structures of 1050℃ normalizing Fe-0.4C-B alloy has been made up of pearlite, ferrite, boron contained carbide Fe23（C,B） 6 and Fe2B. The normalizing treatment hasn＇t change the primary austenite dendrite continuous net distribution of boron contained carbide Fe23 （C,B）6. With the increase of boron content, the wear rate of 1050℃ normalizing Fe- 0.4C-B alloy firstly reduces and then increases while the wear resistance is firstly increases and then reduces. The wear resistance of 1050℃ normalizing Fe-0.4C-B alloy is similar to high chromium cast iron when the carbon content is 0.44% and the content of boron is 2.95%.

关 键 词：材料实验 Fe-0.4C-B合金 磨粒磨损 正火组织 耐磨性 

分 类 号：TG115.58[金属学及工艺—物理冶金]