- Danish Technological Institute, Denmark
- Danfoss A/S, Denmark
- Esti Chem A/S, Denmark
- Houghton Danmark A/S, Denmark
As an alternative to machining, bulk and sheet forming of stainless steel has large potential in Danish industry producing pumps, equipment for dairy and other victual products etc. This concerns especially the two groups of forming processes "cold forging" and "deep drawing". Due to the high flow stress and heavy strain hardening, however, the tribological conditions are very severe. New tribologic tests are developed, to make up a series of tests ranging from laboratory tests to full scale production tests. New lubricants are evaluated with respect to their environmental safety. The new type of lubricants for sheet forming of stainless steel developed during the previous MUP2-project (annual reports 1996-97) have been further improved, and tested on a variety of different types of steel and other metals as well as of different geometries of specimens. This work has been carried out in close collaboration with the other project partners. Furthermore, an electrolytic process for applying coatings of zinc-calcium-phosphate on stainless steel previously developed, has been further improved. These coatings are used in combination with sodium stearate as lubricants for cold forging of stainless steel. Work concerning problems of upscaling this coating process has been carried out, including methods for process control etc. The possibility of preparing other types of coatings in a similar way (metal oxides and hydroxides) has also been investigated.
|Period||01/01/98 → 31/12/98|