不锈钢热浸镀铝后的抗氧化性能

通过对普通奥氏体不锈钢1Cr18Ni9Ti热浸镀铝（Al）＋混合稀土（RE）,分析了热浸镀铝不锈钢的高温长时间（500h）抗氧化性能。结果表明,热浸镀铝不锈钢在700℃、800℃的氧化增重较相同条件下未镀铝不锈钢的氧化增重高;1000℃氧化时,在热浸镀铝不锈钢的表面生成完整的α－Al2O3,使镀件表现出良好的长时间抗氧化性能,因而可以在此温度下长期使用。     

电解铜箔镀锌工艺的研究

本文讨论了电解铜箔采用硫酸盐工艺镀锌的方法,并对工艺配方及工艺条件进行了优化研究,表明采用该工艺对电解铜箔进行镀锌,能达到质量要求,且工艺稳定,操作方便,成本低则一种理想的镀锌铜箔生产工艺。     

热浸镀锌烟尘收集装置流场的数值分析

热浸镀锌时,锌浴上方烟尘的控制和后处理是热浸镀锌领域的研究热点,目前尚未找到更有效的控制措施。针对侧吸式烟尘收集装置从设计上进行了改进,并运用FLUENT软件对15°、30°和45°吹风口结构烟尘收集的流场进行了数值模拟与分析。结果表明,射入气流角度对烟尘收集效果影响明显,其中30°入射角,烟尘收集最为理想;15°入射角时,吹风口的帽檐影响工件取出,不能有效地阻挡锌液飞入;45°入射角时,入射气流形成的气幕过窄,从而不能有效地阻挡控制烟尘气体的流向。研究结果对热浸镀锌池上方烟尘收集装置的进一步设计及优化提供了理论依据。     

Zum Einfluss der Topographie der Stahloberfläche auf Fehler beim Stückgut‐Feuerverzinken

About the Influence of the Topography of the Steel Surface on Faults during Hot Galvanizing of Part Loads The topography of the steel surface can influence the formation of layers during hot galvanizing in many ways. Information is given on galvanizing faults caused by impressions in the steel surface (rolling and drawing ridges). Flux remainders accumulated in these impressions can be encapsulated in the zinc coating during hot galvanizing. This leads to cavities and pores in the coating or to sponge‐like zinc raisings at its surface. The flux remainders from the zinc coating can boil during powder coating and lead to blisters and pimple‐like rises in the coating. Therefore, steel surfaces designed for galvanizing should be even or only have flat impressions.