Evaluation of fluoride based conversion coating on al-alloy for cold forming lubrication performances

Conference proceedings article

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Premanond V., Niyomrit P.

ผู้เผยแพร่: Wiley-VCH Verlag

ปีที่เผยแพร่ (ค.ศ.): 2012

Volume number: SPL. ISSUE

หน้าแรก: 1051

หน้าสุดท้าย: 1054

จำนวนหน้า: 4

ISBN: 9783514007970

นอก: 1611-3683

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84898440988&partnerID=40&md5=321adec3f13cd840ba81397218e0fd4c

ภาษา: English-Great Britain (EN-GB)

บทคัดย่อ

Commercial coating of fluoride based lubricant on Al-alloy has been studied for its characteristic to reduce friction and to prevent metal to metal contact in cold forming operations. The tool material used is high speed steel JIS-SKH51 with 64 HRC. Various conditions of lubricant coating were applied in order to obtain variation in the coating weight ratio. Friction characteristic of the coating has been explored using ball on disk with circular relative movement. The ball was made from hardened high speed steel and the disk was Aluminum AA-6063 coated with fluoride based lubricant. It was found that the metal soap layer plays an important role in reducing friction. Friction and thinning mechanism of lubricant film during cold forming operation has been explored using double cup extrusion test. Finite element simulations, commercial code DEFORM have been used to obtain friction calibration curves and to explore contact pressure and sliding behavior of the deformed part in the localized area. It was found that coefficient of friction is reduced with increasing the lubricant weight ratio up to a certain level. Local thinning of fluoride coating has been found. The parameters influencing the degree of lubricant thinning are contact pressure and surface sliding. ฉ 2012 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

คำสำคัญ

Fluoride based coating, Lubricant thinning