摘要
采用表面浸渗复合技术,通过常规铸造方法在铸铁表面获得SiO2陶瓷颗粒增强的金属陶瓷复合层,并用于工业钢锭模的表面强化。在此基础上采用扫描电镜,图像分析仪和微区x射线衍射研究了金属陶瓷复合层的组织性能和界面结构。结果表明,采用表面浸渗复合方法在金属表面可获得2~5mm厚的金属陶瓷复合层。复合层中陶瓷颗粒均匀分布,金属由基体连续过渡到表面。铸铁基体与SiO2之间存在明显的界面反应,二者的结合为反应结合。采用金属陶瓷表面复合强化的钢锭模,其使用寿命比普通钢锭模提高近1倍,且钢锭模内表面抗氧化和龟裂性能明显提高。
In the present paper,a new surface infiltrating composite method was employedto obtain metal and ceramic composite layer on the surface of metal by the traditional castingtechnique. The microstructure, properties and interface feature of the composite layer were studiedby SEM, image processing system and microzone x-ray diffraction It was found that a compositelayer with the thickness of 2~5 mm can be obtained on the surface of cast iron by the surfaceinfiltration composite method.In the composite layer,SiO2 particulates distribute uniformly and themetal distributes continuously from the matrix to surface. Evident interface reactions exist betweenthe cast iron matrix and SiO2 ceramic,Because of the high heat and oxidation resistance of ceramic,the oxidation resistance and fracture resistance are evidently increased,The application of thetechnique to the composite mold shows that the service life of the metal-ceramic mold is about 1 timehigher than that of tlie traditlonal mold.
出处
《重庆大学学报(自然科学版)》
CAS
CSCD
1995年第4期55-60,共6页
Journal of Chongqing University
关键词
组织性能
铁基
金属陶瓷复合层
组织
性能
ceramic
microstructure and proporties/infiltration composite