Area Related
CONTROL OF GALLING DURING FORMING GALVANIZED ADVANCED HIGH STRENGTH STEEL
A grant by International Lead Zinc Research Organization (ILZRO)
The increased use of galvanized Advanced High Strength Steel (AHSS) in the automotive industry created several new challenges in forming these materials for producing complex auto body panels. Among these challenges is galling leading to reduction in tool life. Forming of galvanized AHSS involves higher contact pressure and temperature at the tool-workpiece interface compared to forming mild steel. These unfavourable tribological interface conditions result in failure of commonly used lubricants and may lead to galling and significantly reduced tool life. Therefore it is desirable to study the influence of various factors on galling and develop/select best tribological conditions (sheet/tool coatings, surface finish/texture and lubricant) that postpones galling and enhances tool life for given process conditions.
The Center for Precision Forming (formerly EngineeringResearchCenter for Net Shape Manufacturing- ERC/NSM) has significant experience in studies on Friction and Lubrication in stamping (http://nsm.eng.ohio-state.edu/html/s-reports.html). In collaboration with a number of companies, the ERC/NSM has submitted a proposal to the International Lead Zinc Research Organization (ILZRO) (www.ilzro.org) for the development of best/practical tribological system (chemical, mechanical surface treatments of die & sheet, and lubricant) that reduces/eliminates galling in forming galvanized AHSS.
We are delighted that ILZRO decided to fund our proposal and the study has started in July 2006.
This study will include the participation by ILZRO members and other stamping companies as well as interested die makers and lubricant suppliers in 1) selecting sheet/tool materials, coatings and lubricants, and 2) conducting tribotests under relevant production conditions. Bohler–Uddeholm (www.bucorp.com), a leader in advanced tool materials and coatings and IRMCO (www.irmco.com), a leading supplier of lubricants for the sheet metal forming industry agreed to work with us in conducting this research project:
To review the PROJECT PLAN, please click here.
The PROGRESS REPORTS AND RESULTS of the project are available to participating companies and are accessible with a user name & password
User Name:
Password:
Interested stamping and lubrication companies are invited to contact Hyunok Kim (kim.1628@osu.edu) or Dr. Taylan Altan (altan.1@osu.edu ) for further information and for possible participation in this study.
