The experiment on wear of steel/steel pair and steel/aluminum alloy pair have been done on model M-200 wear testing machine to invest the relations between lubricating ability of lubricants and the extrinsic conditions (the load ,vel.

In order to study the rationality of hardness ratio for the lead screw-nut pair of rolling mill grinding device used at present,the tribology characteristic of the steel-copper friction pair and the relations between the steel skin hardness and the surface treatment craft under the N150.