Evaluation of environmentally friendly lubricants for cold forging

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• 作者：Yoshihiro Sagisaka^a ; ^{sagisaka@iri.pref.shizuoka.jp} ; Itaru Ishibashi^b ; Tamotsu Nakamura^c ; Masahiro Sekizawa^b ; Yuh Sumioka^d ; Masahiro Kawano^e
• 关键词：Cold forging ; Tribology ; Environmentally friendly lubricant ; Conversion coating ; Friction test
• 刊名：Journal of Materials Processing Technology
• 出版年：2012
• 期刊代码：102_09240136
• 类别：et
• 出版时间：September, 2012
• 卷：212
• 期：9
• 页码：1869-1874
• 文件大小：873 K

摘要

The authors proposed double-layer-type environmentally friendly lubricants, which were composed of an undercoat, superior in adhering to a material, and an overcoat, superior in reducing the friction between the material and the die. The performance of these lubricants for cold forging was evaluated by the ring compression test, the combined forward rod-backward can extrusion-type friction test and the combined forward conical can-backward straight can extrusion-type friction test. The double-layer-type lubricants showed comparable friction characteristics and anti-pick-up properties to a conversion coating lubricant, when the film thickness and surface treatment before coating were improved. In a practical application by cold multistage forging, the double-layer-type lubricants showed a similar performance to a conversion coating lubricant.