Research on the effect of remanence and the earth's magnetic field on tribo-magnetization phenomenon of ferromagnetic materials

In order to research the effect of magnetic field including in remanence and the earth's magnetic field on tribo-magnetization phenomenon, a new apparatus, which could shield the earth's magnetic field, was built to perform reciprocating friction test. Based on changes of surface magnetic field and SEM analyses, the whole friction process of different ferromagnetic materials was characterized. And the effects of wear degree, normal loads, materials and different remanence of blocks on changes in the surface magnetic field were examined. Experimental results show degree of wear, normal load and ambient magnetic field have a positive effect on tribo-magnetization. The increment of surface magnetic field in normal direction, which resulted from the constant earth's magnetic field, was about 0.05GS for pure iron. •A new apparatus, was built to perform reciprocating friction test.•Tribo-magnetization of 316L/Fe, 316L/1045 and 316L/42CrMo experienced three stages.•Surface magnetic field on the wear scar increased with the increasing of normal load .The effect of magnetic shield was about 0.05Gs on the Vpp of magnetic field changes.•Remanence made a positive difference for generation of surface magnetic field.