Influence of surface properties on formability and galling resistance of sheet steel
This report gives the results of an investigation which has been carried out into the effect of surface properties on formability and galling resistance of sheet steel. To obtain a wide range of controlled surface texture, in terms of roughness and wavelength, a laboratory electro-discharge texturing system (EDT) was used to prepare work rolls for the laboratory rolling mill. The EDT method was selected because it was capable of giving accurate and independent control of both roughness and wavelength well outside the range of that attainable by shot blasting for work roll preparation. Two low carbon (concast and rimming) steel sheet grades were used for the majority of the testing. A number of high strength steel grades were also investigated. Formability was assessed using the modified stretch-draw test and the galling studies were made using a purpose built rig. The galling work involved the assessment of two rust preventative mill oils, two deep drawing lubricants and a solid film lubricant. Optimisation of the surface texture parameters (roughness and wavelength) both enhanced the formability potential and reduced the galling tendency. The sheet steel material and the tooling effects must also be considered.
Bibliographic Reference: EUR 11965 EN (1989) MF, 116 pp., ECU 8, blow-up copy ECU 10.00
Record Number: 198911236 / Last updated on: 1994-12-01
Original language: en
Available languages: en