铸造Fe-B-Ti合金导卫板的研究和应用  

Research and Application of Cast Fe-B-Ti Alloy Guide Plate

作　　者：姜琳[1] 符寒光[2] 杨景武 

机构地区：[1]东北轻合金加工厂设计公司,哈尔滨市150060 [2]西安交通大学铸造及耐磨材料研究所,西安市710049 [3]北京冶金设备设计研究总院机械研究所,北京市100029

出　　处：《中国铸造装备与技术》2007年第3期13-17,共5页China Foundry Machinery & Technology

基　　金：中国博士后科学基金(20060390316)资助

摘　　要：针对线材轧机导卫板使用寿命短,更换频繁,严重影响轧钢产品的产量和质量,开发了含0.1%～0.4%C、0.8%～2.5%B、0.5%～1.5%Ti、0.8%～1.2%Cr和0.5%～1.2%Mn的铸造Fe-B-Ti合金导卫板,并借助光学显微镜、扫描电镜和X衍射分析等手段,研究了Fe-B-Ti合金的凝固和热处理组织,在此基础上测试了Fe-B-Ti合金热处理后的力学性能、耐磨性和抗热疲劳性能。结果发现,铸造Fe-B-Ti合金的凝固组织由金属基体和硼化物组成,1000℃淬火后基体转变成了强韧性好的板条马氏体,硼化物成孤立状分布,具有良好的强韧性、耐磨性和抗热疲劳性能,用于制造导卫板,使用效果明显优于高镍铬合金钢和高铬铸铁导卫板,且生产成本大幅度降低。To count the situation that the guide plate of wire rolling mill has short servicing life and a frequent replacing ,which effects seriously the output and quality of steel rolling product,a new type of cast Fe-B-Ti alloy guide plate has been developed whose main compositions are 0.1 -0.4%C,0.8-25%B, 0.5-1.5% Ti, 0.8-1.2%Cr and 0.5-1.2%Mn.The solidification and heat treatment structures of cast Fe- B-Ti alloy have been researched by means of optical microscopy （OM）,scanning electron microscopy （SEM） and X-ray diffraction （XRD）.Then the mechanical performance,wear resistance and thermal fatigue property of cast Fe-B-Ti alloy have been measured.The results have shown that the as-cast structures of cast Fe-B-Ti alloy consist of the metallic matrix and boride.After quenching at 1000℃, the metallic matrix transforms into the lath martensite and the boride turns into isolated distribution,with excellent strength and toughness ,wear resistance and thermal fatigue property.The servicing effect of cast Fe-B-Ti alloy guide plate is more excellent than that of high Ni-Cr alloy cast steel and high Cr cast iron guide plate and such alloy guide plate has been with low production cost.

关 键 词：铸造Fe-B-Ti合金 导卫板 耐磨性 抗热疲劳性 

分 类 号：TG27[金属学及工艺—铸造]