TWI522458B - Lubricants for metal processing - Google Patents

Lubricants for metal processing Download PDF

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TWI522458B
TWI522458B TW100110757A TW100110757A TWI522458B TW I522458 B TWI522458 B TW I522458B TW 100110757 A TW100110757 A TW 100110757A TW 100110757 A TW100110757 A TW 100110757A TW I522458 B TWI522458 B TW I522458B
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oil
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TW201142012A (en
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Hideo Sugii
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Idemitsu Kosan Co
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    • C10M129/00Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
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    • C10M169/00Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
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    • C10M105/08Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
    • C10M105/32Esters
    • C10M105/42Complex esters, i.e. compounds containing at least three esterified carboxyl groups and derived from the combination of at least three different types of the following five types of compound: monohydroxy compounds, polyhydroxy compounds, monocarboxylic acids, polycarboxylic acids and hydroxy carboxylic acids
    • C10M105/44Complex esters, i.e. compounds containing at least three esterified carboxyl groups and derived from the combination of at least three different types of the following five types of compound: monohydroxy compounds, polyhydroxy compounds, monocarboxylic acids, polycarboxylic acids and hydroxy carboxylic acids derived from the combination of monocarboxylic acids, dicarboxylic acids and dihydroxy compounds only and having no free hydroxy or carboxyl groups
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    • C10M2203/00Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/102Aliphatic fractions
    • C10M2203/1025Aliphatic fractions used as base material
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    • C10M2207/00Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
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    • C10M2207/00Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
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    • C10N2030/00Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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    • C10N2030/00Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/08Resistance to extreme temperature
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    • C10N2040/00Specified use or application for which the lubricating composition is intended
    • C10N2040/20Metal working
    • C10N2040/243Cold working
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    • C10N2040/00Specified use or application for which the lubricating composition is intended
    • C10N2040/20Metal working
    • C10N2040/244Metal working of specific metals
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Description

金屬加工用潤滑油組成物 發明領域
本發明係有關於使用在軋延等之金屬加工用潤滑油組成物。
發明背景
當進行金屬材料之軋延時,軋延板已通過之部分的作業輥上,會產生以固定色調著色的所謂輥鍍之現象。由於作業輥常時直接接觸軋延板,因此該輥鍍對軋延性或軋延製品表面性狀會造成莫大影響。例如,在不鏽鋼的冷軋方面,由於軋延前步驟中的退火或酸洗淨所生成的晶界狀網目狀花樣會將光漫散反射,致使板光澤度降低。這種情況下,就必須在冷軋時除去前述網目花紋使板光澤度提升。此種作用乃是藉由輥鍍之生成所能完成的,於是,在寬度方向使均勻的輥鍍生成一事,就表面品質而言是非常重要的(文獻1:參考志渡等「軋延材料表面對輥鍍生成與表面光澤帶來的影響」;第47回塑性加工聯合演講會;p281-282;1996)。又,在精加工軋延步驟上,係將表面粗度大的輥更換成精加工用的表面粗度小的輥。因此,精加工軋延乃是從無輥鍍之狀態開始,到輥鍍生成之前板光澤度偏低。隨之,若輥鍍生成得慢,則軋延板的成品率低,結果上生產性也低落不彰。因此,在作業輥表面生成輥鍍不僅可賦予軋延板高度光澤,且從生產性觀點來看也是屬於很理想的現象。
緣此,在金屬材料的軋延上,係尋求作業輥表面迅速生成輥鍍,而軋延油的選定就變得很重要。又,作為軋延油係要求軋延性佳,亦即可以低軋延荷重獲得高壓下率,且在嚴酷條件下不產生燒結(熱刮痕)也很重要。尤其在不鏽鋼的冷軋中,基於材料為硬質故而對軋延油亦要求耐燒結性,進一步基於其用途,故材料表面的匠心性也很重要,對板光澤度高的要求也頗為強烈。
於是,已有提案一種不鏽鋼用冷軋油,係含有由碳原子數6~10之脂肪族直鏈二羧酸與碳原子數3~5之醇所構成的二酯者(參考文獻2:日本特開2001-240884號公報)。另外,也有提案一種冷軋油組成物,係含有主骨架為碳原子數12~28之脂肪族二羧酸與碳原子數1~9之脂肪族醇所獲得的二酯0.5~30質量%及磷系化合物0.01~5.0質量%者(參考文獻3:WO2003/097774號說明書)。
然而,文獻2所記載的不鏽鋼用冷軋油,非惟輥鍍生成上有很長的軋延距離,且耐燒結性也稱不上足夠。又,文獻3所記載的冷軋油組成物方面,雖然耐燒結性獲得認可,然而在輥鍍生成上仍需要些許軋延距離。
發明概要
本發明之目的係提供一種可在短軋延距離賦予軋延板高光澤,且耐燒結性亦優異的金屬加工用潤滑油組成物。
為了解決前述課題,本發明係提供如下的金屬加工用潤滑油組成物。
[1]一種金屬加工用潤滑油組成物,其特徵在於:係於基油中摻混以下述式(1)表示的二酯化合物而成者;
R1OCO-Z-COOR2 (1)
(式中,R1、R2各自獨立為碳原子數1以上且18以下的烷基;Z為碳原子數10以上且12以下的伸烷基)。
[2]如上述金屬加工用潤滑油組成物,其中前述式(1)中之Z為直鏈結構。
[3]如上述金屬加工用潤滑油組成物,其中前述式(1)中的二酯化合物之摻混量以組成物全量基準計係0.1質量%以上且30質量%以下。
[4]如上述金屬加工用潤滑油組成物,其中更摻混了油性劑。
[5]如上述金屬加工用潤滑油組成物,該組成物係供冷軋用。
[6]如上述金屬加工用潤滑油組成物,該組成物係供不鏽鋼用。
本發明之金屬加工用潤滑油組成物,係於基油中摻混了預定二酯化合物而成者,故耐燒結性優異,同時可在短軋延距離賦予軋延板高光澤。因此,在用作不鏽鋼等硬金屬材料之冷軋上至為有用。
用以實施發明之形態
本發明之金屬加工用潤滑油組成物(以下亦僅略稱為「本組成物」)中,作為基油者可使用礦物油或合成油之任一種。
礦物油方面,可舉出各種礦物油。例如:將石蠟基系原油、中間基系原油或環烷基系原油予以常壓蒸餾、或將常壓蒸餾之殘渣油予以減壓蒸餾所獲得的蒸餾油、或者是將之藉常法精製而獲得的精製油,可舉例如溶劑精製油、氫化精製油、脫臘處理油、及白土處理油等。
又,合成油方面,可採用碳原子數8到14的聚α-烯烴(POA)、烯烴共聚物(OCP,例如乙烯-丙烯共聚物等)、或聚丁烯、聚丙烯等支鏈烯烴或該等的氫化物、甚且是聚醇酯(三羥甲丙烷之脂肪酸酯、新戊四醇之脂肪酸酯等)等的酯系化合物、烷基苯等。
本發明中,可使用1種前述之礦物油或合成油作為基油,亦可合併使用2種以上作為基油。也可以將礦物油與合成油混合使用。
作為這種基油者,係以40℃時的動黏度在1mm2/s至30mm2/s之範圍者為佳,在4mm2/s至20mm2/s之範圍者更佳。該動黏度低於1mm2/s時則閃點偏低,因閃火造成火災等的危險性恐會增加,另一方面,若超過30mm2/s時,則軋延板表面會產生油孔而致使光澤度低,也有發生捲繞滑移等不順利情況之虞。
本組成物係對前述基油摻混以下述式(1)表示的二酯化合物而成者。
R1OCO-Z-COOR2 (1)
此處,式中,R1、R2係各自獨立為碳原子數1以上且18以下的烷基。R1或R2的碳原子數若在19以上,恐有軋延板的光澤偏低之虞。又,自耐燒結性的觀點來看,R1或R2的碳原子數係以4以下為佳,尤其以R1及R2的碳原子數皆在4以下為佳。這種烷基可舉甲基、乙基、丙基、丁基,而丙基或丁基係直鏈狀或支鏈狀皆可。該等之中,在耐燒結性這點上,最為理想者係R1及R2皆為甲基之情況。
上述式(1)中,Z係碳原子數10以上且12以下的伸烷基。若屬於Z的碳原子數在該範圍的伸烷基,則耐燒結性良好,軋延時輥鍍易於生成,軋延板的光澤也可變良好。Z無論是直鏈或具有支鏈皆可,而以直鏈在光澤賦予這點上較佳。又,基於耐燒結性與輥鍍生成的觀點,係以Z的碳原子數為10、且R1及R2皆為甲基之情況最佳。
本組成物中,以式(1)表示的二酯之摻混量,基於耐燒結性及輥鍍易於生成的觀點,以組成物全量基準計係0.1質量%以上且40質量%以下為佳。該二酯的較佳摻混量以組成物全量基準計係1質量%以上且30質量%以下,更佳係1質量%以上且20質量%以下,甚佳係3質量%以上且20質量%以下。
本組成物中,宜進一步摻混油性劑。可適當採用單酯或高級醇作為本組成物中所摻混的油性劑。
單酯方面以碳原子數13以上48以下的單酯為佳。藉由將該單酯與上述式(1)的二酯組合使用,可使耐燒結性與軋延板的光澤進一步提升。又,藉由摻混該單酯,亦可使上述二酯的使用量降低。
作為這種單酯者可舉例如以下述式(2)表示的脂肪族單羧酸酯。
R3COOR4 (2)
此處,式中,R3係表示碳原子數11以上且22以下的烷基,R4係表示碳原子數1以上且25以下的烷基,R3與R4的合計碳原子數在12以上且47以下。
以式(2)表示的單酯之較佳碳原子數係在13以上且36以下的範圍。該單酯的具體例,可適當舉出硬脂酸甲酯、硬脂酸丁酯、硬脂酸辛酯、棕櫚酸辛酯等,而該等之中,基於有助於耐燒結性之點及取得性之觀點,係以硬脂酸丁酯最佳。
本組成物中,可使用1種上述單酯,亦可合併使用2種以上。又,軋延油組成物中該單酯的摻混量以組成物全量基準計係0.5質量%以上且40質量%以下的範圍為佳,3質量%以上且30質量%以下的範圍較佳,尤其5質量%以上且20質量%以下的範圍最佳。該單酯的摻混量若超過40質量%,則恐有發生軋輥滑移之虞,並且,亦有低溫流動性惡化之虞。
作為高級醇者,基於耐燒結性之點,係以碳原子數12以上且18以下的醇為佳。具體而言,可例舉各種飽和醇或不飽和醇,飽和醇、不飽和醇皆可良好地使用。作為這種飽和醇者,可舉直鏈或支鏈狀十二醇(例如月桂醇)、直鏈或支鏈狀十三醇、直鏈或支鏈狀十四醇、直鏈或支鏈狀十五醇、直鏈或支鏈狀十六醇、以及該等的混合物等。
又,作為不飽和醇者,可舉直鏈狀或支鏈狀十烯醇、直鏈狀或支鏈狀十一烯醇、直鏈狀或支鏈狀十二烯醇、直鏈狀或支鏈狀十三烯醇、直鏈狀或支鏈狀十四烯醇、直鏈狀或支鏈狀十五烯醇、直鏈狀或支鏈狀十六烯醇、直鏈狀或支鏈狀十七烯醇、直鏈狀或支鏈狀十八烯醇等。
本組成物中摻混上述高級醇之情況時的比例並無特別限定,不過自耐燒結性之點,以組成物全量基準計係1質量%以上且20質量%以下,以2質量%以上且15質量%以下為佳,以3質量%以上且12質量%以下更佳。
在不阻礙發明效果之範圍內,亦可對本組成物摻混以下所示的各種添加劑。具體而言,可適當摻混界面活性劑、特壓劑、抗磨耗劑、抗氧化劑、防鏽劑、金屬不活性化劑、及消泡劑等來使用。
界面活性劑係用於將本組成物分散於水中作成乳劑使用的情況。作為界面活性劑者可舉例如陰離子性界面活性劑、陽離子性界面活性劑、非離子性界面活性劑、及兩性界面活性劑等。陰離子性界面活性劑方面,有苯磺酸烷基鹽、α-烯烴磺酸鹽等。陽離子性界面活性劑方面,有烷基三甲銨鹽、二烷基二甲銨鹽等的四級銨鹽等。非離子性界面活性劑方面,可舉聚氧伸烷基烷基醚、聚氧伸烷基烷基苯基醚等的醚。摻混量以組成物全量基準計係宜在0.01質量%以上、10質量%以下的範圍選定。
作為特壓劑者,可舉例如硫化烯烴、二烷基聚硫化物、聚芳烷基聚硫化物、二芳基聚硫化物等的硫磺系化合物、磷酸酯、硫代磷酸酯、亞磷酸酯、烷基亞磷酸氫鹽、磷酸酯胺鹽、亞磷酸酯胺鹽等的磷系化合物等。又,其摻混量以組成物全量基準計係宜在0.01質量%以上且10質量%以下,較佳係可在0.05質量%以上且5質量%以下的範圍選定。
作為抗磨耗劑者,可舉例如二硫代磷酸鋅(ZnDTP)、二硫胺甲酸鋅(ZnDTC)、硫化氧基二硫代磷酸鉬(MoDTP)、硫化氧基二硫胺甲酸鉬(MoDTC)等。又,其摻混量以組成物全量基準計以在0.1質量%以上且5質量%以下的範圍選定為佳。
作為抗氧化劑者,可舉例如烷基化二苯胺、苯-α-萘胺、烷基化-α-萘胺等的胺系、2,6-二-三級丁基-對甲酚等的酚系、及2,6-二-三級丁基-4-[4,6-雙(辛基硫)-1,3,5-三-2-基胺基]酚、硫二丙酸二月桂酯等的硫磺系等。又,其摻混量以組成物全量基準計宜為0.05質量%以上且3質量%以下,較佳為在0.2質量%以上且2質量%以下的範圍選定即可。
作為防鏽劑者,可例舉:如三乙醇胺之烷醇胺、石油磺酸鹽、烷基苯磺酸鹽、萘磺酸二壬酯、琥珀酸烯基酯、及多元醇酯等。該等防鏽劑之摻混量,基於摻混效果之點,以組成物全量基準計宜為0.01質量%以上且1質量%以下,較佳為在0.05質量%以上且0.5質量%以下的範圍選定即可。
作為金屬不活性化劑者,可例舉苯并三唑系、甲苯基三唑系、噻二唑系、及咪唑系化合物等。又,其摻混量係基於摻混效果之點,以組成物全量基準計宜在0.01質量%以上且1質量%以下,較佳為在0.01質量%以上且0.5質量%以下的範圍選定即可。
作為消泡劑者,可舉例如矽氧烷、氟矽烷醇、及氟烷基醚等。消泡劑係基於消泡效果及經濟性之平衡等點,以組成物全量基準計宜在0.005質量%以上且0.1質量%以下的範圍選定。
本發明之金屬加工用潤滑油組成物,可在短軋延距離賦予軋延板高度光澤,且耐燒結性佳,故而尤其適於作為似不鏽鋼這般堅硬、軋延板表面匠心性高的金屬材料之冷軋油來使用。
[實施例]
接著,藉由實施例進一步詳細說明本發明,惟本發明並非受限於該等例子。
[實施例1至7、比較例1至5]
(1)試料油的調製
調製具有表1、表2所示之摻混組成的軋延油(試料油),進行藉軋延機所致之軋延實驗。
在此,用於試料油之調製的各成分如下。
(1.1)基油:採用40℃動黏度為7mm2/s與30mm2/s的2種石蠟基系礦物油,調整該等礦物油之摻混比率以使40℃動黏度成為8mm2/s。
(1.2)二酯1:式(1)之二酯中,R1、R2皆為甲基,Z為碳原子數10的直鏈伸烷基(十二烷二酸二甲酯)。
(1.3)二酯2:式(1)之二酯中,R1、R2皆為甲基,Z為碳原子數12的直鏈伸烷基(十四烷二酸二甲酯)。
(1.4)二酯3:由以下化學式表示的脂肪族二羧酸之二甲酯。
(1.5)二酯4:己二酸二異壬酯
(1.6)二酯5:己二酸二異癸酯
(1.7)三酯:苯三甲酸與辛醇的三酯
(1.8)油性劑:月桂醇、硬脂酸丁酯(丁基硬脂酸酯)
(2)軋延實驗
(2.1)耐燒結性(耐熱刮痕性)之評價
在表3中所示之軋延條件下,進行軋延實驗。具體而言,係將厚度1.5mm之SUS304(2B)材以4道次軋延成0.67mm,在第5道次將壓下率從14.9%逐步提升,求取在軋延板表面開始發生熱刮痕之壓下率。
(2.2)光澤性評價
在表4中所示之道次排程條件下,進行軋延實驗。具體而言,係在第3道次的軋延後以每5m採取板樣本。接著,求取樣本板的光澤依20度光澤(準據ASTM D523)超過850時的軋延距離。該軋延距離愈短,即視為輥鍍之生成愈快。
又,在本實驗中,於實驗所使用的軋延板厚度為1mm且作業輥的表面粗糙Ra為0.03μm,此係與(2.1)的實驗不同。
(3)評價結果
從表1可得知,實施例1至7的試料油係摻混預定的二酯而成,因此可在短軋延距離發揮優異光澤,而且耐燒結性(耐熱刮痕性)也堪稱優異。相對於此,比較例1至4的試料油,由於所摻混的二酯結構與本發明之二酯相異,因此在欲獲得良好光澤上需要頗長的軋延距離。另外,比較例5中由於摻混的酯為三酯,因此同樣需要頗長的軋延距離方可獲得良好光澤。

Claims (5)

  1. 一種金屬加工用潤滑油組成物,其特徵在於:係於基油中摻混以下述式(1)表示的二酯化合物而成者:R1OCO-Z-COOR2 (1)(式中,R1、R2各自獨立為碳原子數1~4的烷基;Z為碳原子數10以上且12以下的伸烷基);又,前述式(1)的二酯化合物之摻混量以組成物全量基準計係0.1質量%以上且40質量%以下,且前述式(1)中之Z為直鏈結構。
  2. 如申請專利範圍第1項之金屬加工用潤滑油組成物,其中前述式(1)的二酯化合物之摻混量以組成物全量基準計係0.1質量%以上且30質量%以下。
  3. 如申請專利範圍第1或2之金屬加工用潤滑油組成物,其係更摻混油性劑而成者。
  4. 如申請專利範圍第1或2之金屬加工用潤滑油組成物,該組成物係供冷軋用。
  5. 如申請專利範圍第4項之金屬加工用潤滑油組成物,該組成物係供不鏽鋼用。
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