CAJ | 학술논문

用金相显微镜（OM）、扫描电子显微镜（SEM）、原子力显微镜（AFM）研究了热镀锌Zn-0.05Al-0.2Sb合金镀层上锌花的表面形貌；利用锌花一次枝晶晶臂夹角α表征了锌花形貌，分析了α随锌晶体基平面相对于钢基表面倾斜角β的变化规律。结果表明，镀层表面按宏观形貌存在三类锌花：亮锌花、羽毛状锌花和暗锌花；α随β的增大而增大，β从0°增加到90°过程中，α从60°增加到180°，对应的锌花形貌分别呈现雪花状、倾斜的六角星状、垂直树枝晶状结构。从锌花的生长过程阐明了镀层表面三种锌花的形成机制；利用单个锌花晶体生长模型进一步解释了单个锌花内形成亮锌花区、羽毛状锌花区和暗锌花区的原因。
용금상현미경（OM）、소묘전자현미경（SEM）、원자력현미경（AFM）연구료열도자Zn-0.05Al-0.2Sb합금도층상자화적표면형모；이용자화일차지정정비협각α표정료자화형모，분석료α수자정체기평면상대우강기표면경사각β적변화규률。결과표명，도층표면안굉관형모존재삼류자화：량자화、우모상자화화암자화；α수β적증대이증대，β종0°증가도90°과정중，α종60°증가도180°，대응적자화형모분별정현설화상、경사적륙각성상、수직수지정상결구。종자화적생장과정천명료도층표면삼충자화적형성궤제；이용단개자화정체생장모형진일보해석료단개자화내형성량자화구、우모상자화구화암자화구적원인。
The spangles on a batch hot-dipped Zn-0.05Al-0.2Sb alloy coating were investigated by metallurgical microscope and scanning electron microscopy (SEM). Spangle morphology was characterized by the angle-αbetween the dendritic arms, the correlation between the angle-α and the inclination angle-β with respect to the steel sheet was analyzed. The results show that the coating surface usually exhibited three kinds of spangles, such as shiny, feathery and dull spangle. The angle-αincreases with the angle-β, the angle-αincreases from 0° to 180° with the angle-βincreases from 0° to 180°, the corresponding spangle morphology appears from a full symmetry Snowflake structure, an inclined hexagonal structure to an orthogonal structure. Formation mechanism of shiny, feathery and dull spangle was expounded by process of spangle growth. Formation of shiny zone, feathery zone and dull zone in the same spangle was further elucidated by a single spangle crystal growth model.