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日本钢管公司为适应汽车对合金化热浸镀锌钢板的需要,1990年4月在福山厂建成2号连续热浸镀锌生产线。该生产线以专门生产汽车用外板为目的,采用了许多新技术。主要设置了以下设备;改良型火钕直接加热带原退火以锌锅,感应加热合金化炉及生产铁-锌双镀层钢板的电镀设备。通过有效利用这些设备,得到优良的表面质量、抗粉化性和力学性能,正按预定目标以高生产率生产优质镀层钢板。 相似文献
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钢管镀锌只在表面形成薄的锌层。同种口径钢管不同壁厚对镀锌的影响,在于单位镀锌表面积不同和支数不同,镀锌加工费应与壁厚成反比。 相似文献
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Yong-quan HE Tao JIA Xiao-jiang LIU Guang-ming CAO Zhen-yu LIU Jun LI 《钢铁研究学报(英文版)》2014,21(2):222-226
A new processing method for producing hot dip galvanized steel is designed and tested, in which pickling is skipped. Hot-rolled low carbon steel sheets are roiled with oxide scale in an experimental mill at room temperature, prior to annealing under a 20% hydrogen reducing atmosphere and galvanizing on a hot-dip galvanizing simulator. Micro-cracks formed in the oxide scale during cold rolling roughen the steel surface and enlarge the specific surface. Through-thickness cracks provide transport channels for hydrogen, and hence the reduction of oxide scale is en- hanced. When the sheet is dipped in the zinc bath, cracks are submerged by liquated zinc and the defects are not dis- tinct after hot-dip galvanizing. The overlay coating occludes with rough surface of the sheet, whereby a superior coat- ing adherence is realized. 相似文献
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Galvanized dual phase steel sheets are used extensively in the industrial applications because of their excellent mechanical properties and superior corrosion resistance, but the segregation of alloying elements and the formation of oxides on the steel surface often have a deleterious effect on coating adhesion during the galvanizing process. In order to improve the coating quality, a nickel layer was pre‐electroplated on the steel substrate before galvanizing and it's found that there is an improvement in the coating quality. The coating microstructures were investigated by scanning electron microscopy together with energy dispersive X‐ray spectroscope, glow discharge optical emission spectroscope and X‐ray diffractions. The experimental results show that the compact Ni3Zn22 intermetallic layer formed at the zinc/nickel interface during the galvanizing process, prohibiting the nucleation and the growth of the ζ‐Zn phase layer and resulting in the improvement of the zinc coating adhesion. 相似文献
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主要叙述诸如冷、热轧带钢连续热镀锌的典型工艺、清洗工艺、退火工艺、轧辊表面粗糙度的毛化技术、后处理技术等国外汽车用热镀锌板生产技术的进步和锌锅技术的发展,同时还侧重介绍热镀锌板生产技术今后的研发重点。 相似文献
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