2010 Fiscal Year Final Research Report

Study on improving friction and abrasion properties under the boundary lubrication for sliding surfaces of engine components and low fuel consumption by means of laser processing

Research Project

Project/Area Number	20510081
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Environmental technology/Environmental materials
Research Institution	Miyagi National College of Technology
Principal Investigator	SHIBATA Kimihiro Miyagi National College of Technology, 専攻科, 特任教授 (80413722)
Co-Investigator(Kenkyū-buntansha)	KUMAGAI Susumu 仙台高等専門学校, マテリアル環境工学科, 准教授 (30390389) SUZUKI Katsuhiko 仙台高等専門学校, 専攻科, 教授 (80187715)
Research Collaborator	MATSUYAMA Hidenobu 日産自動車株式会社, パワートレーン生産技術本部, 主管
Project Period (FY)	2008 – 2010
Keywords	省エネルギー技術 / レーザー加工 / 境界潤滑
Research Abstract	Pulse laser was irradiated on the surfaces of various metallic materials applied to engine components. A fine groove is formed on the surfaces and substances such as sulfide and/or silicide of excellent friction and wear properties are imbedded into the groove due to the shock wave generated. Plasma pressure generated by pulsed laser irradiation reached several GPa to cause the residual compressive stress in the depth of more than 400μm of aluminum surface. Unlubricated friction and wear tests of aluminum surface treated by laser irradiation showed that the performance is improved significantly compared to the untreated aluminum.