纳米陶瓷复合粉粒度对衬瓷层显微组织的影响  

The effects of the particle size of ceramic compound powder on the microstructure of ceramic-layer

作　　者：王楠[1] 韩亚苓[1] 马智欣[1] 丁健[2] 

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110870 [2]沈阳中辰钢结构工程有限公司,沈阳110141

出　　处：《现代技术陶瓷》2012年第4期13-19,共7页Advanced Ceramics

摘　　要：针对传统表面强化技术中存在工艺复杂、耗能高、结合强度低等问题,采用钢水余热衬瓷技术,利用钢水凝固时散出的热量将纳米陶瓷颗粒烧结在铸钢件表面,可以形成高耐磨性的衬瓷层。对纳米陶瓷复合粉进行造粒,研究复合粉的粒度对衬瓷层显微组织的影响。利用SEM对衬瓷层的显微组织进行分析,结果表明:当复合粉颗粒直径为0.25～0.6mm之间,钢水浇铸后形成的衬瓷层光滑平整;钢水进入颗粒间隙,钢水余热将纳米陶瓷复合粉中的金属粉料烧结,形成金属紧紧包覆着陶瓷颗粒的状态;陶瓷颗粒与基体间的界面结合牢固,无缝隙。In order to diminish such disadvantages as complex craft, high energy consumption and low coherent strength in traditional surface coating technologies, utilizing the technology of lining-ceramic layer on surface of steel, the nanometer ceramic compound particles sintered on surface of casting steel and the lining--ceramic--layer been formed rely on redundant heat from molten steel. Granulating The nanometer ceramic compound powder to study the effects of the ceramic compound powder particle size on the microstructure of ceramic--layer. The microstructure of ceramic--layer is observed using SEM （scanning electron microscope）, and the result shows that the lining--ceramic-layer is smooth when the ceramic compound particle diameter between 0.25mm and 0.6ram. The molten steel pour in the particle clearance and sinter the metal powder of the nanometer ceramic compound powder, the mental tight the ceramic coated granules. The interface between the ceramic particles and matrix is high strength and seamless.

关 键 词：衬瓷层 复合粉粒度 显微组织 钢水余热 

分 类 号：TQ153.3[化学工程—电化学工业]