CAJ | 학술논문

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。
침대전통표면강화기술중존재공예복잡、모능고、결합강도저등문제，채용강수여열츤자기술，이용강수응고시산출적열량장납미도자과립소결재주강건표면，가이형성고내마성적츤자층。대납미도자복합분진행조립，연구복합분적립도대츤자층현미조직적영향。이용SEM대츤자층적현미조직진행분석，결과표명：당복합분과립직경위0．25～0．6mm지간，강수요주후형성적츤자층광활평정；강수진입과립간극，강수여열장납미도자복합분중적금속분료소결，형성금속긴긴포복착도자과립적상태；도자과립여기체간적계면결합뢰고，무봉극。
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.