D0L:10.13374/.issn1001-053x.2013.11.012 第35卷第11期 北京科技大学学报 Vol.35 No.11 2013年11月 Journal of University of Science and Technology Beijing Nov.2013 板带钢乳化液对金属表面润湿性的研究 易美荣，孙建林凶，孙桥，戈晓达 北京科技大学材料科学与工程学院，北京100083 ☒通信作者，E-mail:sjl@ustb.edu.cm 摘要利用正交试验设计分析了乳化剂质量分数、油性剂种类和乳化液体积分数对板带钢乳化液润湿性的影响，研究 了不同阴离子和非离子乳化剂的复合比例对乳化液动态接触角的影响机理.结果表明：影响乳化液在普碳钢Q235表面 接触角和铺展系数的因素的大小顺序为乳化液体积分数>乳化剂质量分数>油性剂种类：阴离子和非离子组成的复合 乳化剂改善乳化液润湿性的效果优于单一非离子或阴离子乳化剂.最后，运用YG-G经验方程计算普碳钢Q235基板 的表面张力和乳化液与基板的界面张力.计算结果表明：普碳钢Q235基板的表面张力约为43mNm1,当阴离子乳化 剂的质量分数为50%时，复合乳化液与基板的界面张力最小，较单独添加阴离子乳化剂时的界面张力降低了10.78%. 关键词冷轧：润滑：乳化液：表面张力：接触角：界面张力 分类号TG335.12 Wettability of emulsions on metal surfaces for strip cold rolling YI Mei-rong,SUN Jian-lin,SUN Qiao,GE Xiao-da School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:sjl@ustb.edu.cn ABSTRACT Orthogonal test was designed to investigate the effect of emulsifier mass fraction,oiliness additives and emulsion volume fraction on the wettability of emulsions for strip cold rolling.The influence mechanism of complex emulsifiers with different anionic-to-nonionic ratios on the wettability of emulsions was also discussed in detail.It is found that the ranking of effect on the contact angle and spreading coefficient of emulsions is emulsion volume emulsifier mass fraction oiliness additives.Compared with the single nonionic or anionic emulsifier,the complex emulsifiers present a more excellent ability of enhancing the wettability of emulsions.The surface tension of Q235 steel substrates and the emulsion-substrate interfacial tension were calculated by the Y-G-G empirical equation.The results show that surface tension of Q235 steel substrates is 43 mN.m-1.In comparison with the single anionic emulsifier,when the mass fraction of the anionic emulsifier is 50%,the emulsion-substrate interfacial tension is the lowest,which is decreased by 10.78%. KEY WORDS cold rolling:lubrication;emulsions;surface tension;contact angle;interfacial tension 在板带钢冷轧时，通常采用兼有冷却作用的乳集，则板带钢表面出现未被乳化液覆盖的裸露点. 化液进行工艺润滑以减少摩擦、降低轧制力、冷却聚集的乳化液由于重力作用容易从板带钢表面滑 轧辊和控制板形).乳化液的润湿性不仅影响其在落，更增大了板带钢表面裸露的面积.这些裸露点 摩擦副表面的吸附量，还引起冷轧塑性变形区供油在轧制过程中与轧辊表面发生直接接触，不仅导 状态的变化，进而对乳化液的润滑效果有显著影 致轧后板带钢的表面质量较差，且缩短轧辊的寿 响②。如果乳化液对板带钢表面的润湿效果不佳，命3-④.有研究表明，在冷轧时，提高乳化液对摩擦 则乳化液在板带钢表面“铺展不开”，在其表面聚 副表面的润湿能力，可以降低轧制过程摩擦磨损， 收稿日期：2012-08-25第 35 卷 第 11 期 北 京 科 技 大 学 学 报 Vol. 35 No. 11 2013 年 11 月 Journal of University of Science and Technology Beijing Nov. 2013 板带钢乳化液对金属表面润湿性的研究 易美荣，孙建林 ，孙 桥，戈晓达 北京科技大学材料科学与工程学院，北京 100083 通信作者，E-mail: sjl@ustb.edu.cn 摘 要 利用正交试验设计分析了乳化剂质量分数、油性剂种类和乳化液体积分数对板带钢乳化液润湿性的影响，研究 了不同阴离子和非离子乳化剂的复合比例对乳化液动态接触角的影响机理. 结果表明：影响乳化液在普碳钢 Q235 表面 接触角和铺展系数的因素的大小顺序为乳化液体积分数 > 乳化剂质量分数 > 油性剂种类；阴离子和非离子组成的复合 乳化剂改善乳化液润湿性的效果优于单一非离子或阴离子乳化剂. 最后，运用 Y-G-G 经验方程计算普碳钢 Q235 基板 的表面张力和乳化液与基板的界面张力. 计算结果表明：普碳钢 Q235 基板的表面张力约为 43 mN·m−1，当阴离子乳化 剂的质量分数为 50%时，复合乳化液与基板的界面张力最小，较单独添加阴离子乳化剂时的界面张力降低了 10.78%. 关键词 冷轧；润滑；乳化液；表面张力；接触角；界面张力 分类号 TG335.12 Wettability of emulsions on metal surfaces for strip cold rolling YI Mei-rong, SUN Jian-lin , SUN Qiao, GE Xiao-da School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China Corresponding author, E-mail: sjl@ustb.edu.cn ABSTRACT Orthogonal test was designed to investigate the effect of emulsifier mass fraction, oiliness additives and emulsion volume fraction on the wettability of emulsions for strip cold rolling. The influence mechanism of complex emulsifiers with different anionic-to-nonionic ratios on the wettability of emulsions was also discussed in detail. It is found that the ranking of effect on the contact angle and spreading coefficient of emulsions is emulsion volume > emulsifier mass fraction > oiliness additives. Compared with the single nonionic or anionic emulsifier, the complex emulsifiers present a more excellent ability of enhancing the wettability of emulsions. The surface tension of Q235 steel substrates and the emulsion-substrate interfacial tension were calculated by the Y-G-G empirical equation. The results show that surface tension of Q235 steel substrates is 43 mN·m−1 . In comparison with the single anionic emulsifier, when the mass fraction of the anionic emulsifier is 50%, the emulsion-substrate interfacial tension is the lowest, which is decreased by 10.78%. KEY WORDS cold rolling; lubrication; emulsions; surface tension; contact angle; interfacial tension 在板带钢冷轧时，通常采用兼有冷却作用的乳 化液进行工艺润滑以减少摩擦、降低轧制力、冷却 轧辊和控制板形 [1] . 乳化液的润湿性不仅影响其在 摩擦副表面的吸附量，还引起冷轧塑性变形区供油 状态的变化，进而对乳化液的润滑效果有显著影 响[2] . 如果乳化液对板带钢表面的润湿效果不佳， 则乳化液在板带钢表面 “铺展不开”，在其表面聚 集，则板带钢表面出现未被乳化液覆盖的裸露点. 聚集的乳化液由于重力作用容易从板带钢表面滑 落，更增大了板带钢表面裸露的面积. 这些裸露点 在轧制过程中与轧辊表面发生直接接触，不仅导 致轧后板带钢的表面质量较差，且缩短轧辊的寿 命[3−4] . 有研究表明，在冷轧时，提高乳化液对摩擦 副表面的润湿能力，可以降低轧制过程摩擦磨损， 收稿日期：2012-08-25 DOI:10.13374/j.issn1001-053x.2013.11.012