THE
INFLUENCE OF MICROSTRUCTURE AND HYDROGEN-CONTAINING ENVIRONMENT ON THE
INTENSITY OF CAST IRON AND STEEL DAMAGE BY SLIDING FRICTION
PART 1. THE CONSTRUCTION OF A
GENERALIZED MODEL OF SURFACE LAYER FRICTION OF GRAPHITIZED STEEL AND CAST-IRON OBJECTS
PART 7
PART 1, PART 2, PART 3, PART 4, PART 5, PART 6, PART 7
Cold-work
manganese steels are prospective
tribotechnical materials [15]. In spite of the fact that these materials are
rather difficult in machining by
metal-cutting machine tools, insufficiently processed surfaces (Fig. 12
- samples 1, 2) they keep well a layered
lubricant such as graphite during sliding friction. After machining (Fig. 12
sample 3) the graphitized cast-iron gives in to manganese steel because of the
cleanliness of the surface and its
roughness.
Nevertheless, considering that the significant
part of triboconjugation works during lubricating, it is possible to achieve a
high quality of friction surface (Fig. 12 sample 4).
Fig. 12. Surfaces of friction pin of cold-work manganese steel (1,2) and graphitized manganese cast-iron (3)
before (1, 2, 3) and after tests (4).
In this work the main attention is given to
tribotechnical properties of both steel and cast-iron and the dependence of
their properties on the microstructure and the
influence of alloying elements. It should be noted
that in triboconjugation there are complex enough interactions between
contacting surfaces at all stages is unreal. That is why we plan to reveal new facts in the second part of our paper.
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Wpływ
mikrostruktury i środowisk wodoronośnych na intensywność zużycia ciernego żeliw
i stali. Część I: Budowa uogólnionego modelu tarcia w warstwach wierzchnich
detali wykonanych z grafityzowanych stali i żeliw.
Słowa
kluczowe:
Mikrostruktura, wodór, tarcie, stal grafityzowana,
żeliwo.
Streszczenie:
W pracy przedstawiono analizę mechanizmów zużycia
ciernego, dokonaną w oparciu o źródła literaturowe i wyniki badań własnych.
Zaprezentowano uogólniony model wpływu mikrostruktury, składu chemicznego i
wodoronośnego oddziaływania smarów na procesy zużycia warstwy wierzchniej żeliw
i stali grafityzowanych. Jako podstawowe czynniki warunkujące intensywność
zużycia określono ciśnienie, prędkość liniową w węźle tarcia oraz skład
chemiczny i mikrostrukturę stali.
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