MS  >> Vol. 7 No. 6 (September 2017)

    不同入锅温度和气氛下高Al-Mg含量的锌基镀层汽车用钢镀层形貌对比
    Morphology of High Al-Mg-Zn Coated Auto Steel Hot Dipped by Different Diving Temperature and Atmosphere

  • 全文下载: PDF(7208KB) HTML   XML   PP.603-608   DOI: 10.12677/MS.2017.76079  
  • 下载量: 526  浏览量: 2,205  

作者:  

方 芳,杜小峰,陈一鸣:武汉钢铁有限公司技术中心,湖北 武汉

关键词:
汽车用钢高Al-Mg入锅温度露点H2含量Auto Steel High Al-Mg Diving Temperature Dew Point H2Content

摘要:

采用含有较高Al-Mg含量的锌液(7.2%Al~1.6%Mg-Zn),改变钢板入锅温度、露点和H2含量,研究该3种热镀工艺参数对汽车用深冲钢镀层质量和形貌的影响。结果表明,试验钢冷轧薄板在高Al含量的镀液中具有良好的浸润性,厚度均在10~20 µm左右。镀层由三种不同形貌组织的组成:亮白色Zn颗粒、粗大富Al相、细小密布富Mg相。随着热镀工艺的钢板,镀层形貌有明显的差异:入锅温度为460、475、490˚C时,镀层形貌变化不大;露点从−50增加到30˚C,粗大富Al相大大减少,亮白色Zn颗粒更为细小;H2含量从5增加到15%时,粗大的富Al相破碎,贯穿整个视场的枝晶状组织消失。

The effect of three hot dipping parameters on coating quality and morphology of deep drawing auto steel by high Al-Mg content zinc pot was studied, including diving temperature, dew point and H2 content. The results display that, the cold rolled thin sheet has a good wettability in the high Al-Mg content zinc pot, with average coating thickness from 10 to 20 µm. The coating morphology consists of three phases: bright Zn particle, coarse Al rich phase and fine Mg rich phase. The coating morphology changes a lot with different dipping parameters: as diving temperatures increase from 460˚C to 490˚C, the morphology has little difference with each other; as dew points increase from −50˚C to 30˚C, the amount of coarse Al rich phase decreases significantly, and Zn particles became finer; as H2 content increases from 5% to 15%, the coarse Al phase is broken and the dendrite structure disappear.

文章引用:
方芳, 杜小峰, 陈一鸣. 不同入锅温度和气氛下高Al-Mg含量的锌基镀层汽车用钢镀层形貌对比[J]. 材料科学, 2017, 7(6): 603-608. https://doi.org/10.12677/MS.2017.76079

参考文献

[1] 师绍广, 陈冷, 张清辉. 热浸镀锌钢板镀层织构与耐蚀性[J]. 北京科技大学学报, 2010(4): 455-460.
[2] Hiseshi, F., Rie, K. and Hiroshi, I. (2009) Hot-Dip Zn-5%Al Alloy-Coated Steel Sheets. JFE Technical Report, 14, 41-45.
[3] Morimoto, Y., Honda, K., Nishimura, K., et al. (2003) Excellent Corrosion-Resistant Zn-Al-Mg-Si Alloy Hot-Dip Galvanized Steel Sheet “Super DYMA”. Nippon Steel Technical Report, 87, 22-24.
[4] Shimizu, T. (2010) Zn-Al-Mg Coatings-The Characteristics of “ZAM” and Development in the Future. 2010 China Continuous Galvanizing Conference, Beijing.
[5] De Bruycker, E., Zermout, Z. and De Cooman, B.C. (2007) Zn-Al-Mg Coatings: Ther-modynamic Analysis and Microstructure Related Properties. Materials Science Forum, 1276, 539-543.
[6] Shindo, H., Nishimura, K., Okado, T., et al. (1999) Developments and Properties of Zn-Mg Galvanized Steel Sheet “Dymazinc” Having Excellent Corrosion Resistance. Nippon Steel Technical Report, 79, 63-67.
[7] Morimoto, Y., Honda, K., Nishimura, K., et al. (2003) Excellent Corrosion-Resistant Zn-Al-Mg-Si Alloy Hot-Dip Galvanized Steel Sheet “Super Dyma”. Nippon Steel Technical Report, 87, 24-26.
[8] Komatsu, A., Tsujimura, T., Watanabe, K., et al. (1999) Hot-Dip Zn-Al-Mg Coated Steel Sheet Excellent in Corrosion Resistance and Surface Appearance and Process for the Production Thereof. European Patent No. 0905270.
[9] 杨洪刚, 李锋, 吕家舜. Z1.6A1.6M 合金镀层组织结构及性能研究[J]. 鞍钢技术, 2014(1): 38-42.
[10] 凌全伟, 董磊. 热镀锌线上炉内带钢表面选择性氧化的影响因素分析[J]. 冶金能源, 2011, 30(1): 39-42.