CN107267271B - 一种用于铝合金板带材热轧工艺的润滑剂 - Google Patents
一种用于铝合金板带材热轧工艺的润滑剂 Download PDFInfo
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Abstract
本发明提供了一种用于铝合金板带材热轧工艺的润滑剂,包括:基础油、有机脂肪酸、有机胺、润滑酯、油膜增强剂、乳化剂、防锈剂、抗氧剂和消泡剂;所述油膜增强剂包括磷酸酯、双酯和聚烯烃‑合成酯共聚物。本申请润滑剂中的关键组分油膜增强剂,通过磷酸酯、双酯与聚烯烃‑合成酯共聚物的复配,起到协同作用,可在铝合金板带材轧制的过程中形成复合油膜,提高了油膜的强度,消除了铝合金板带材的表面质量缺陷。
Description
技术领域
本发明涉及金属压力加工技术领域,尤其涉及一种用于铝合金板带材热轧工艺的润滑剂。
背景技术
铝合金制品在国民经济中扮演着越来越重要的角色;随着经济的发展,用户对铝合金板带材的质量要求也越来越高,例如汽车板材、罐体料、航空板材、印刷版基等高端铝合金产品,这就需要板带材加工企业提供厚度均匀、板形良好、铝合金表面光洁均匀和深加工性能优良的产品,以适应下游铝合金深加工工序不断提高的要求。
铝合金板带材的热轧工艺是在铝合金再结晶温度以上进行的。一般粗轧工艺中,铝板带温度在450℃~560℃之间,精轧或连轧工艺中铝板带温度在280℃~450℃之间。在上述苛刻的加工条件下,特别是铝合金本身具有熔点低、质地软、延展性好以及容易粘附等特点,板带材表面容易产生粘铝、表面残留多等问题,导致产品质量缺陷。在铝合金热轧工艺中,需要专用的润滑剂(或称轧制油、轧制液、乳化油等)为轧制过程提供润滑、冷却、清洗和防锈等功能。润滑剂一般是与水配制成3%~5%(粗轧工艺)和6%-8%(连轧工艺)浓度的乳化液来使用。
目前,市面常见的热轧工艺润滑剂一般是由矿物油、乳化剂、简单合成酯、简单的聚脂肪酸酯和天然动植物油等构成,配成一定浓度的水包油型的乳化液来使用。在轧制工艺中,乳化液会发生部分油水分离现象,油分离出来吸附在金属表面形成油膜起润滑作用,水分离出来起到冷却清洗作用。由于铝合金表面温度很高,且铝合金质地较软,现有的传统工艺润滑剂形成的油膜在高温高压作用下容易发生脱附现象和油膜破裂,导致金属表面发生直接接触和摩擦,金属发生微区焊接、撕裂,造成表面粘铝、色差等质量缺陷。另外,市面上也有一些润滑剂采用添加简单的聚合不饱和脂肪酸酯或聚合不饱和脂肪酸来增加油膜强度,虽然在一定程度能够提高润滑作用,但聚合不饱和脂肪酸酯存在极性基团过多、极性过强,分子中不饱和键过多导致其水解稳定性、热氧化稳定性不好,且极性基团容易与乳化液中金属碎屑、金属离子反应而形成更加粘稠的大分子金属皂,金属皂及其粘附的金属屑吸附在金属工件表面,导致金属表面残留过多,甚至造成粘铝和乳液斑的严重质量缺陷;在某些条件下还可能造成打滑现象而出现后道工序难以消除的振痕缺陷。因此,需要寻找一种能在苛刻的高温高压轧制工艺条件下在金属表面可以牢固吸附、增强油膜性能的润滑成分,开发性能更加优异的铝合金热轧工艺润滑剂,以改善轧制后铝合金板带材表面的粘铝、残留过多等缺陷,提高铝合金板带材的表面质量。
发明内容
本发明解决的技术问题在于提供一种用于铝合金板带材热轧工艺的润滑剂,本申请提供的润滑剂具有较高的油膜强度,由此可改善轧制加工后铝板表面粘铝等缺陷。
有鉴于此,本申请提供了一种用于铝合金板带材热轧工艺的润滑剂,包括:基础油、有机脂肪酸、有机胺、润滑酯、油膜增强剂、乳化剂、防锈剂、抗氧剂和消泡剂;所述油膜增强剂包括磷酸酯、双酯和聚烯烃-合成酯共聚物。
优选的,所述基础油的含量为15wt%~60wt%,所述有机脂肪酸的含量为4wt%~25wt%,所述有机胺的含量为2wt%~10wt%,所述润滑酯的含量为10wt%~40wt%,所述油膜增强剂的含量为9wt%~25wt%,所述乳化剂的含量为2wt%~8wt%,所述防锈剂的含量为1wt%~3wt%,所述消泡剂的含量为0.01wt%~0.3wt%,所述抗氧剂的含量为0.5wt%~1.0wt%。
优选的,以所述润滑剂为基,所述油膜增强剂中的磷酸酯的含量为2wt%~6wt%,所述双酯的含量为3wt%~8wt%,所述聚烯烃-合成酯共聚物的含量为4wt%~11wt%。
优选的,所述基础油选自60N、70N、100N、150N、500N、600N、变压器油、46#冷冻机油和橡胶填充油中的一种或多种。
优选的,所述有机脂肪酸选自十碳脂肪酸、十二碳脂肪酸、十四碳脂肪酸、十六碳脂肪酸和十八碳脂肪酸中一种或多种。
优选的,所述有机胺选自脂肪胺、醇胺和脂环胺中的一种或多种。
优选的,所述润滑酯选自合成酯类和天然脂肪类中的一种或多种,所述合成酯类选自三羟甲基丙烷油酸酯、新戊二醇油酸酯、三羟甲基丙烷辛癸酸酯和三羟甲基丙烷棕榈油酸酯中的一种或多种,所述天然脂肪类选自精制猪油、精制棕榈油、精制椰子油和精制大豆油中的一种或多种。
优选的,所述乳化剂为脂肪醇聚氧乙烯醚和石油磺酸钠。
优选的,所述防锈剂为十二烯基丁二酸、三氮唑及其衍生物的混合物;所述抗氧剂为酚类抗氧剂;所述消泡剂为矿物油基聚合物型消泡剂。
优选的,所述油膜增强剂中的磷酸酯为磷酸酯胺盐混合物或带聚氧乙烯基团的酸性磷酸酯;所述双酯为由C6~C10的二元酸形成的酯。
本申请提供了一种用于铝合金板带材热轧工艺的润滑剂,其包括基础油、有机脂肪酸、有机胺、润滑酯、油膜增强剂、乳化剂、防锈剂、抗氧剂和消泡剂,其中油膜增强剂包括磷酸酯、双酯和聚烯烃-合成酯共聚物;一般情况下,润滑油的润滑状态分为流体润滑、边界润滑和极压润滑,本申请油膜增强剂中的双酯与聚烯烃-合成酯共聚物对于流体润滑和边界润滑可提供强有力的支持,在极压润滑状态中,金属表面相互接触很近,油膜最薄,磷酸酯可与金属表面在高温高压条件下形成熔点较低、高强度的液体反应物膜,有效降低摩擦和磨损产生;因此,本申请提供的润滑剂由于油膜增强剂中磷酸酯、双酯和聚烯烃-合成酯共聚物的协同作用,可在铝合金板带材轧制过程中形成复合油膜,在金属表面形成高低搭配的三层油膜,同时兼顾流体润滑、边界润滑与极压润滑的需要,有效提高了油膜的强度。
进一步的,本申请中油膜增强剂中的聚烯烃-合成酯共聚物中有极性的酯基基团吸附在金属表面,而没有极性的长链烃基则伸向液体中,由此既增加了形成的油膜强度,又增加了油膜厚度。
附图说明
图1为聚烯烃-合成酯共聚物的分子结构示意图;
图2为润滑剂在应用时混合状态下的复合油膜示意图。
具体实施方式
为了进一步理解本发明,下面结合实施例对本发明优选实施方案进行描述,但是应当理解,这些描述只是为进一步说明本发明的特征和优点,而不是对本发明权利要求的限制。
鉴于铝合金本身具有熔点低、质地软、延展性好,容易粘附等特点,铝合金板带材在热轧的过程中表面容易产生粘铝、表面残留多等问题,现有技术中常规的润滑剂应用于铝合金板带材热轧中效果并不是很好,铝板表面容易出现粘铝、残留过多以及乳液斑等问题,因此,本申请提供了一种性能更加优异的润滑剂,以消除铝合金板带材热轧过程中以及热轧后的表面质量缺陷。具体的,本发明实施例提供的用于铝合金板带材热轧工艺的润滑剂包括:
基础油、有机脂肪酸、有机胺、润滑酯、油膜增强剂、乳化剂、防锈剂、抗氧剂和消泡剂;所述油膜增强剂包括磷酸酯、双酯和聚烯烃-合成酯共聚物。
本申请提供的润滑剂利用油膜增强剂中的磷酸酯、双酯和聚烯烃-合成酯共聚物的复配作用,使润滑剂在工件表面形成复合油膜,提高了铝合金板带材热轧工艺中的油膜强度。
具体的,本申请中的润滑剂包括基础油,所述基础油为本领域技术人员熟知的,对此本申请不进行特别的限制。示例的,所述基础油选自60N、70N、100N、150N、500N、600N、变压器油、46#冷冻机油和橡胶填充油中的一种或多种;在具体实施例中,所述基础油选自70N、150N、变压器油和橡胶填充油中的一种或多种。所述基础油的含量为15wt%~60wt%,在具体实施例中,所述基础油的含量为20wt%~50wt%,在具体实施例中,所述基础油的含量为25~45wt%。
所述有机脂肪酸具有润滑、润湿、耦合、增溶、有助于形成油膜等作用。本申请中所述有机脂肪酸选自十碳脂肪酸、十二碳脂肪酸、十四碳脂肪酸、十六碳脂肪酸和十八碳脂肪酸中一种或多种;在具体实施例中,所述有机脂肪酸选自十二碳脂肪酸和十六碳脂肪酸的混合物或十六碳脂肪酸和十八碳脂肪酸的混合物。所述有机脂肪酸的含量为4wt%~25wt%,在具体实施例中,所述有机脂肪酸的含量为6wt%~20wt%,在具体实施例中,所述有机脂肪酸的含量为8wt~15wt%。
本申请中所述有机胺为乳化液体系提供碱性条件,有助于乳化、清洗等作用。所述有机胺选自选自脂肪胺、醇胺和脂环胺中的一种或多种;更具体的,所述脂肪胺选自一乙胺、二乙胺、三乙胺、十二胺、十六胺和异丙胺中的一种或多种,所述醇胺选自一乙醇胺、二乙醇胺、三乙醇胺和异丙醇胺,所述脂环胺选自环己胺和二环己胺中的一种或两种;在具体实施例中,所述有机胺选自三乙醇胺、二环己胺和异丙醇胺。所述有机胺的含量为2wt%~10wt%,在具体实施例中,所述有机胺的含量为5wt%~9wt%。
本申请所述润滑剂中还包括润滑酯,所述润滑酯可在金属表面吸附形成油膜,提供润滑性能。所述润滑酯选自合成酯类和天然脂肪类中的一种或多种;具体的,所述合成酯类选自三羟甲基丙烷油酸酯、新戊二醇油酸酯、三羟甲基丙烷辛癸酸酯和三羟甲基丙烷棕榈油酸酯中的一种或多种,所述天然脂肪类选自精制猪油、精制棕榈油、精制椰子油和精制大豆油中的一种或多种;在具体实施例中,所述润滑酯选自精制椰子油、三羟甲基丙烷油酸酯和新戊二醇油酸酯。所述润滑酯的含量为10wt%~40wt%,在具体实施例中,所述润滑酯的含量为15wt%~38wt%,在具体实施例中,所述润滑酯的含量为20wt%~30wt%。
所述乳化剂为本领域技术人员熟知的,本申请中所述乳化剂选自脂肪醇聚氧乙烯醚和石油磺酸钠的混合物。所述乳化剂的含量为2wt%~8wt%,在具体实施例中,所述乳化剂的含量为3wt%~5wt%。所述防锈剂为本领域技术人员熟知的,本申请所述防锈剂为十二烯基丁二酸、三氮唑及其衍生物。所述防锈剂的含量为1wt%~3wt%。所述抗氧剂选自酚类抗氧剂,所述消泡剂选自矿物油基聚合物型消泡剂;本申请中所述抗氧剂的含量为0.5wt%~1.0wt%,所述消泡剂的含量为0.01~0.3wt%。
本申请所述润滑剂的关键组分在于油膜增强剂,其包括磷酸酯、双酯和聚烯烃-合成酯共聚物;在本申请中,所述磷酸酯选自磷酸酯胺盐混合物或带聚氧乙烯(聚氧丙烯)基团的酸性磷酸酯;以所述润滑剂为基,所述磷酸酯的含量为2wt%~6wt%,在具体实施例中,所述磷酸酯的含量为3.5wt%~5wt%。本申请中,所述双酯优先选自由C6~C10的二元酸形成的酯;所述双酯的含量为3wt%~8wt%,在具体实施例中,所述双酯的含量为4~7wt%。所述聚烯烃-合成酯共聚物是聚烯烃与合成酯单体的共聚物,其结合了合成酯和聚烯烃的优点,例如:长链分子的润滑能力,酯基基团在金属表面的强吸附能力,聚烯烃的高水解稳定性、低挥发性、燃烧无残留,又避免了合成酯抗氧化、抗水解稳定性不好,聚烯烃没有极性导致其在金属表面的吸附能力不够等缺点。本申请中聚烯烃-合成酯共聚物的分子结构示意图如图1所示,在所述聚烯烃-合成酯共聚物中,有极性的酯基基团吸附在金属表面,而没有极性的长链烃基基团则伸向液体中,由此构成的油膜既增加了强度,又增加了厚度。以所述润滑剂为基,所述聚烯烃-合成酯共聚物的含量为4wt%~11wt%,在具体实施例中,所述聚烯烃-合成酯共聚物的含量为5wt%~10wt%,更具体的,所述聚烯烃-合成酯共聚物的含量为6wt%、7wt%、8wt%、9wt%或10wt%。本申请所述聚烯烃为丙烯和除丙烯外的α-烯烃的共聚物,丙烯均聚物,或乙烯和除乙烯外的α-烯烃的共聚物;具体的,所述聚烯烃-合成酯共聚物为C8~C18的烯烃共聚物-C6~C12的二烯酸酯的共聚物;更具体的,所述聚烯烃-合成酯共聚物为1-辛烯/1-十二烯共聚物与2,4-十二碳二烯酸甲酯的共聚物或乙烯辛烯共聚物与1,3-十碳二烯酸乙酯的共聚物。
在传统的工艺润滑理论中,润滑状态分为三种:流体润滑、边界润滑和极压润滑;流体润滑状态中,油膜较厚,可将金属表面隔离开,从而避免其相互接触而产生摩擦和磨损;边界润滑状态中,金属表面因微观上凹凸不平(高度差为微米级,由此产生所谓粗糙度概念)而相互接触很近,油膜较薄;在极压润滑状态中,金属表面相互接触很近,油膜最薄。在实际的润滑过程中,这三种润滑状态是同时存在的,即为“混合润滑”状态,至于哪种润滑状态占主体作用,与当时的应用条件直接相关。
本申请所述润滑剂的制备方法按照本领域技术人员熟知的方法制备即可,对此本申请没有特别的限制。示例的,所述润滑剂的制备方法具体为:
按照各组分的配比,将基础油加热,在搅拌状态下依次加入有机脂肪酸、润滑酯、有机胺、乳化剂、油膜增强剂和防锈剂,搅拌后最后加入抗氧剂和消泡剂,搅拌后得到润滑剂。
本发明提供的润滑剂的油膜增强剂中的双酯和聚烯烃-合成酯共聚物的应用对于流体润滑、边界润滑可提供强有力的支持;磷酸酯类成分可与金属表面在高温高压条件下形成熔点较低、高强度的液体反应物膜,有效降低摩擦和磨损产生。本发明润滑酯中的油膜增强剂可形成复合油膜,即采用磷酸酯、双酯和聚烯烃-合成酯共聚物复配使用,达到协同作用,在金属表面形成高低搭配的三层油膜,具体如图2所示,同时兼顾流体润滑、边界润滑和极压润滑的需要。在热轧工艺中,粗轧工艺润滑状态以极压润滑和边界润滑为主,而连轧工艺润滑状态以边界润滑和流体润滑为主。针对不同的轧制工艺,在润滑剂中可灵活调整磷酸酯、双酯和聚烯烃-合成酯共聚物的含量,以适应不同的轧制工艺、满足不同的润滑要求。
针对传统润滑剂的不足,本发明选取极性适中、且在乳化液体系中高温高压、存在大量金属屑和金属离子的条件下,能够具有优异的水解稳定性、抗氧化稳定性、优异的润滑性能的润滑成分作为油膜增强剂,以便改善高温铝合金表面与轧辊之间变形区内的油膜性能,消除了铝板表面的粘铝、残留过多、乳液斑等问题,同时还能提高乳化液中有效成分的水解稳定性、抗氧化稳定性,延长乳化液使用寿命,从而减少废液排放,降低消耗,保护环境。
为了进一步理解本发明,下面结合实施例对本发明提供的用于铝合金板带材热轧工艺的润滑剂,本发明的保护范围不受以下实施例的限制。
实施例
将基础油按照配比加入调和罐中,加热至40~50℃,搅拌均匀;在搅拌状态下,再依次按配比加入有机脂肪酸、润滑酯、有机胺、乳化剂、油膜增强剂和防锈剂,搅拌1~2h至透明,最后加入抗氧剂和消泡剂,搅拌2h,得到润滑剂。分别针对粗轧工艺和连轧工艺提供两组润滑剂,润滑剂各组分的含量具体如表1和表2所示。
表1应用于铝合金板带材粗轧工艺的润滑剂的各组分数据表
表2应用于铝合金板带材连轧工艺的润滑剂的各组分数据表
组分 | 实施例4 | 实施例5 | 实施例6 |
基础油 | 29.9 | 17.4 | 26.7 |
十六碳脂肪酸 | 4 | 6 | 2 |
十八碳脂肪酸 | 4 | 3 | 8 |
三乙醇胺 | 5 | 7 | 8 |
二环己胺 | 1 | 1 | 0 |
异丙醇胺 | 1 | 0 | 2 |
精制棕榈油 | 18 | 15 | 10 |
三羟甲基丙烷油酸酯 | 15 | 20 | 9 |
新戊二醇油酸酯 | 0 | 5 | 5 |
脂肪醇聚氧乙烯醚 | 5 | 4 | 2 |
石油磺酸钠 | 2 | 1 | 1 |
磷酸酯胺盐混合物 | 2 | 3.5 | 6 |
辛二酸二乙酯 | 3 | 5 | 7 |
聚烯烃-合成酯共聚物 | 6 | 8 | 10 |
十二烯基丁二酸 | 2 | 2 | 0.5 |
三氮唑及其衍生物 | 0.8 | 1 | 1.5 |
酚类抗氧剂 | 1 | 0.8 | 1 |
矿物基聚合物型消泡剂 | 0.3 | 0.3 | 0.3 |
注:表1中聚烯烃-合成酯共聚物具体为1-辛烯/1-十二烯共聚物与2,4-十二碳二烯酸甲酯的共聚物;
表2中聚烯烃-合成酯共聚物具体为乙烯辛烯共聚物与1,3-十碳二烯酸乙酯的共聚物。
选取市面上在售的具有代表性的两种传统铝热轧工艺润滑剂1#和2#,分别采用本发明实施例制备的两种铝热轧工艺润滑剂3#(实施例1)和4#(实施例4)进行油膜强度对比检测,检测方法采用GB/T 3142-82(2004)(润滑剂承载能力测定法(四球法)),检测最大无卡咬负荷(即油膜强度),实验仪器为厦门天机自动化有限公司的MS-10四球摩擦试验机,样品为原液,油温为80℃,检测条件按照GB/T 3142-82(2004)进行,检测结果如表3所示,
表3传统润滑剂与本发明润滑剂的性能数据表
组别 | 1# | 2# | 3# | 4# |
最大无卡咬负荷(kg) | 58 | 61 | 70 | 72 |
由表3可知,本发明的工艺润滑剂采用了“复合油膜”技术,比传统的工艺润滑剂有更强的油膜强度;采用本发明技术的工艺润滑剂,能有效帮助在金属表面建立超强的润滑油膜,可明显改善轧制加工后铝板表面发生的粘铝等质量缺陷。
以上实施例的说明只是用于帮助理解本发明的方法及其核心思想。应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以对本发明进行若干改进和修饰,这些改进和修饰也落入本发明权利要求的保护范围内。
对所公开的实施例的上述说明,使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的,本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下,在其它实施例中实现。因此,本发明将不会被限制于本文所示的这些实施例,而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。
Claims (7)
1.一种用于铝合金板带材热轧工艺的润滑剂,包括:基础油、有机脂肪酸、有机胺、润滑酯、油膜增强剂、乳化剂、防锈剂、抗氧剂和消泡剂;所述油膜增强剂包括磷酸酯、双酯和聚烯烃-合成酯共聚物;
以所述润滑剂为基,所述油膜增强剂中的磷酸酯的含量为2wt%~6wt%,所述双酯的含量为3wt%~8wt%,所述聚烯烃-合成酯共聚物的含量为4wt%~11wt%;
所述油膜增强剂中的磷酸酯为磷酸酯胺盐混合物或带聚氧乙烯基团的酸性磷酸酯;所述双酯为由C6~C10的二元酸形成的酯;
所述润滑酯选自合成酯类和天然脂肪类中的一种或多种,所述合成酯类选自三羟甲基丙烷油酸酯、新戊二醇油酸酯、三羟甲基丙烷辛癸酸酯和三羟甲基丙烷棕榈油酸酯中的一种或多种,所述天然脂肪类选自精制猪油、精制棕榈油、精制椰子油和精制大豆油中的一种或多种;
所述聚烯烃-合成酯共聚物为C8~C18的烯烃共聚物-C6~C12的二烯酸酯的共聚物。
2.根据权利要求1所述的润滑剂,其特征在于,所述基础油的含量为15wt%~60wt%,所述有机脂肪酸的含量为4wt%~25wt%,所述有机胺的含量为2wt%~10wt%,所述润滑酯的含量为10wt%~40wt%,所述油膜增强剂的含量为9wt%~25wt%,所述乳化剂的含量为2wt%~8wt%,所述防锈剂的含量为1wt%~3wt%,所述消泡剂的含量为0.01wt%~0.3wt%,所述抗氧剂的含量为0.5wt%~1.0wt%。
3.根据权利要求1或2所述的润滑剂,其特征在于,所述基础油选自60N、70N、100N、150N、500N、600N、变压器油、46#冷冻机油和橡胶填充油中的一种或多种。
4.根据权利要求1或2所述的润滑剂,其特征在于,所述有机脂肪酸选自十碳脂肪酸、十二碳脂肪酸、十四碳脂肪酸、十六碳脂肪酸和十八碳脂肪酸中一种或多种。
5.根据权利要求1或2所述的润滑剂,其特征在于,所述有机胺选自脂肪胺、醇胺和脂环胺中的一种或多种。
6.根据权利要求1或2所述的润滑剂,其特征在于,所述乳化剂为脂肪醇聚氧乙烯醚和石油磺酸钠。
7.根据权利要求1或2所述的润滑剂,其特征在于,所述防锈剂为十二烯基丁二酸、三氮唑及其衍生物的混合物;所述抗氧剂为酚类抗氧剂;所述消泡剂为矿物油基聚合物型消泡剂。
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