CN108329974B - 一种冷却降温效果好的防锈乳化油及其制备方法和应用 - Google Patents
一种冷却降温效果好的防锈乳化油及其制备方法和应用 Download PDFInfo
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Abstract
本发明属于机械用油技术领域,特别涉及一种冷却降温效果好的防锈乳化油及其制备方法和应用,防锈乳化油组分包括基础油、表面活性剂、防锈剂、甘草酸、助溶剂、消泡剂;将防锈乳化油的各组分充分混合后,加入水中搅拌成乳化液,该防锈乳化油/液体系在用作金属工件切削加工介质时具有很好的传热能力,即冷却能力。
Description
技术领域
本发明属于机械用油技术领域,特别涉及一种冷却降温效果好的防锈乳化油及其制备方法和应用。
背景技术
在对金属加工的过程中,工件易与环境介质、加工介质中组分分解或氧化变质而产生的污染物如油泥等相接触而受腐蚀,同时对工件实施加工的机床部件表面也会因此而腐蚀;此外,在工件加工后或工序之间流转过程中需要被暂时存放,残留在工件表面的加工介质、包括周围环境因素(特别是潮湿的环境)也会对金属产生侵蚀。这要求金属被加工时所处的加工介质具有一定的防锈防腐性能。
此外,对金属(特别是超硬、超强度等难加工材料)进行加工时由于刀具对材料的剧烈摩擦而产生大量热量,如不及时释放这些热量,会导致工件和刀具发生热变形,降低了工件的加工精度,也降低了刀具的耐用度。因此,加工介质还需要具有良好的传热性能,将热量从刀具和工件处带走,从而有效降低加工温度,而如何提升加工介质的传热能力,也是本领域技术人员一直以来所研究的课题。
发明内容
本发明所要解决的技术问题在于:如何提升金属加工介质的传热能力,为此,本方案提供了一种冷却降温效果好的防锈乳化油,按重量份数计算,该防锈乳化油包括如下组分:
其中,基础油为N7号机械油、N10号机械油、N15号机械油中的一种或几种的组合,
表面活性剂采用非离子表面活性剂与阴离子表面活性剂的组合,
非离子表面活性剂选择Span类,如Span-60、Span-65、Span-80、Span-85中的一种或几种的组合,
阴离子表面活性剂选择十二烷基苯磺酸钠、十二烷基磺酸钠、十二烷基硫酸钠中的一种或几种的组合,
防锈剂为苯并三氮唑、T747、三乙醇胺硼酸酯、咪唑啉酰胺中的一种或几种的组合,
助溶剂为甘油、丙二醇中的一种或几种的组合,
消泡剂选择有机硅消泡剂;
本发明还提供了一种上述防锈乳化油的制备方法,在常温(25℃)下,将各组分充分混合即可。
使用时,将上述防锈乳化油加入水中搅拌成乳化液,将工件浸没于该乳化液中后,对工件进行切削加工。
本方案在防锈乳化油/液体系中加入了甘草酸,很好地提高了该防锈乳化油/液体系在用作金属工件切削加工介质时的传热能力,即冷却能力。
具体实施方式
实施例1
一种冷却降温效果好的防锈乳化油,按重量份数计算,该防锈乳化油包括如下组分:
将以上各组分在常温(25℃)下充分混合后得到防锈乳化油,再加入水中搅拌成乳化液,控制乳化液中含防锈乳化油的质量分数为10%。
实施例2
一种冷却降温效果好的防锈乳化油,按重量份数计算,该防锈乳化油包括如下组分:
将以上各组分在常温(25℃)下充分混合后得到防锈乳化油,再加入水中搅拌成乳化液,控制乳化液中含防锈乳化油的质量分数为10%。
对照例1
在实施例1的基础上未加入甘草酸,且针对省去的甘草酸,在加水搅拌乳化的过程中通过补充等质量的水来弥补,其余组分及操作均同实施例1:
一种冷却降温效果好的防锈乳化油,按重量份数计算,该防锈乳化油包括如下组分:
将以上各组分在常温(25℃)下充分混合后得到防锈乳化油,再加入水中搅拌成乳化液,控制乳化液中含防锈乳化油的质量分数为9.48%。
对照例2
在实施例1的基础上,适当减少非离子表面活性剂及阴离子表面活性剂各自的用量,其余组分及操作均同实施例1:
一种冷却降温效果好的防锈乳化油,按重量份数计算,该防锈乳化油包括如下组分:
将以上各组分在常温(25℃)下充分混合后得到防锈乳化油,再加入水中搅拌成乳化液,控制乳化液中含防锈乳化油的质量分数为10%。
对照例3
在实施例1的基础上,采用相应量的阴离子表面活性剂代替非离子表面活性剂,其余组分及操作均同实施例1:
一种冷却降温效果好的防锈乳化油,按重量份数计算,该防锈乳化油包括如下组分:
将以上各组分在常温(25℃)下充分混合后得到防锈乳化油,再加入水中搅拌成乳化液,控制乳化液中含防锈乳化油的质量分数为10%。
对照例4
在实施例1的基础上,采用相应量的非离子表面活性剂代替阴离子表面活性剂,其余组分及操作均同实施例1:
一种冷却降温效果好的防锈乳化油,按重量份数计算,该防锈乳化油包括如下组分:
将以上各组分在常温(25℃)下充分混合后得到防锈乳化油,再加入水中搅拌成乳化液,控制乳化液中含防锈乳化油的质量分数为10%。
将材质、规格均相同的若干个工件分别浸没于上述各实施例、对照例所制备的乳化液中(各实验中乳化液的用量相等,且均为过量,乳化液期初的温度为25℃),对浸没于各乳化液中的工件进行钻削加工,加工操作及参数相同,以确保在加工过程中所释放出的热量总量尽可能相等,
各实验中钻削加工操作从开始进行到8分钟的节点时,用对温度比较敏感的煤油温度计测量乳化液的温度,温度计测量乳化液中两个位置的温度,一个靠近钻头(下称“A区”),另一个远离钻头(下称“B区”),每一例实验中乳液被测温的部位相同。具体温度如表1所示。
再将各实验中经历了相同钻削加工操作后的工件从乳液中取出,置于湿度为70%、温度为60℃的恒温恒湿箱中进行防锈性能的观察,观察到工件表面出现锈斑的时间节点如表1所示。
表1
项目 | A区温度 | B区温度 | 出现锈斑时间点 |
实施例1 | 37℃ | 32℃ | 102天 |
实施例2 | 38℃ | 32℃ | 107天 |
对照例1 | 47℃ | 28℃ | 103天 |
对照例2 | 45℃ | 29℃ | 102天 |
对照例3 | 46℃ | 28℃ | 102天 |
对照例4 | 47℃ | 29℃ | 104天 |
首先,从上表中对照例1的A区和B区的温度来看,钻削加工时由于摩擦产生的热量主要集中在钻削刀具与工件的附近,而远处的温度依然较低;
而反观本方案的实施例1,仅从乳化液的组分来分析,相比于对照例1少了一部分水,而相应地多了甘草酸。众所周知,水的导热能力一般都明显高于油类,而甘草酸的分子量远远大于水分子,属于大分子油类物质,所以按照常规理解,对照例1乳化液的传热能力应该略高于实施例1才对;但在相同的加工情况下,于实施例1乳化液中所检测到的钻削刀具与工件的附近的温度却有明显降低,而远处温度有所升高(请见表1),这必然是实施例1中有更多的摩擦热从刀具与工件附近被传输到了远处。这一效果是不容易被预见到的,对此,申请人认为原因有可能在于:
甘草酸分子结构复杂,具有多个六元环,因此具有良好的折叠、舒展性;当乳化油/液体系中,靠近刀具与工件的甘草酸分子接触并吸收钻削工件所产生的热量时,其分子结构存在由收缩折叠状转化为舒展状态的这样一个倾向,但是由于甘草酸周围存在大量的表面活性剂,这些表面活性剂本能的乳化作用又始终趋向于对甘草酸进行包覆,因此最终导致了甘草酸大分子受热后无法舒展至预期状态,而甘草酸的这种“半舒展”结构恰好起到了一种类似于容器的作用,很好地持有住一部分热量;
由于液体热对流的缘故(且刀具对工件的切削行为也增强了热对流的程度),使高温区的一部分甘草酸乳胶粒向远离切削加工中心的低温区域迁移,自然也将其所存储的热量带离了高温区域,基于此进一步降低了高温度温度;而达到低温区后,基于甘草酸乳胶粒内外的温差,原本被“半舒展”状态的甘草酸所持有的这部分热量被释放出来,从而进一步提高了低温区的温度。
综上而言,申请人认为,相比于常规的加工介质依靠温差而发生热对流,本方案中甘草酸依靠受热后自身分子结构的变化还额外携带了热量,在热对流的过程中,这部分热量也被转移到低温区,并且这部分热量的转移所带来的冷却效果大大超过了甘草酸由于分子量大(相比于水)对导热性所造成的损失。
从表1中对照例2与实施例1的结果比较来看,两者的防锈能力是相当的,可见对照例2中表面活性剂的用量已经足以达到理想的乳化效果了,即表面活性剂已过量;但是对照例2乳化液的传热、冷却效果远低于实施例1,这可能是由于对照例2中的表面活性剂的量还不足以将甘草酸包围成预期的“半舒展”结构,从而导致其无法很好地锁住热量;
此外,表1中对照例3、4乳化液的传热、冷却效果也远低于实施例1,这是因为不同的表面活性剂作用于同一物质上的位置、程度是不同的,而单一地选择非离子或阴离子表面活性剂,不足以将甘草酸包围成预期的“半舒展”结构,从而导致其无法很好地锁住热量。
Claims (8)
1.一种冷却降温效果好的防锈乳化油,其特征在于:所述的防锈乳化油按重量份数计算包括
基础油 65~80份
表面活性剂 15~20份
防锈剂 3~5份
甘草酸 5~8份
助溶剂 15~30份
消泡剂 1~1.5份,
所述的表面活性剂为非离子表面活性剂与阴离子表面活性剂的组合,
所述的非离子表面活性剂为Span-60、Span-65、Span-80、Span-85中的一种或几种的组合,
所述的阴离子表面活性剂选择十二烷基苯磺酸钠、十二烷基磺酸钠、十二烷基硫酸钠中的一种或几种的组合。
2.如权利要求1所述的冷却降温效果好的防锈乳化油,其特征在于:所述的基础油为N7号机械油、N10号机械油、N15号机械油中的一种或几种的组合。
3.如权利要求1所述的冷却降温效果好的防锈乳化油,其特征在于:所述的防锈剂为苯并三氮唑、T747、三乙醇胺硼酸酯、咪唑啉酰胺中的一种或几种的组合。
4.如权利要求1所述的冷却降温效果好的防锈乳化油,其特征在于:所述的助溶剂为甘油、丙二醇中的一种或几种的组合。
5.如权利要求1所述的冷却降温效果好的防锈乳化油,其特征在于:所述的消泡剂为有机硅消泡剂。
6.一种如权利要求1至5任一项所述的冷却降温效果好的防锈乳化油的制备方法,其特征在于:所述制备方法为,在常温下,将所述防锈乳化油的各组分充分混合。
7.一种如权利要求1至5任一项所述的冷却降温效果好的防锈乳化油的应用,其特征在于:所述应用为,将所述防锈乳化油加入水中搅拌成乳化液,将工件浸没于所述乳化液中后,对所述工件进行切削加工。
8.如权利要求7所述的冷却降温效果好的防锈乳化油的应用,其特征在于:在所述的乳化液中,所述防锈乳化油的质量分数为5~15%。
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