Wear Resistance of Austenitic Steel Fe–17Mn–6Si–0.3C with High Silicon and High Manganese

doi:10.1007/s40195-014-0054-2

Abstract

Abstract:

To solve the problem of poor wear resistance in conventional Hadfield steels under medium and low stress, a new kind of steel with high silicon and high manganese Fe–17Mn–6Si–0.3C was designed and its wear resistance was studied. The results showed that it exhibited better wear resistance than conventional Hadfield steel in both dry friction and abrasive friction. The better wear resistance of the new steel with high silicon and high manganese resulted from the stress-induced γ → ε martensitic transformation.

Key words: High manganese steel, Fe–Mn based alloys, Wear resistance, Martensitic transformation

Haitao Si, Renlong Xiong, Fan Song, Yuhua Wen, Huabei Peng. Wear Resistance of Austenitic Steel Fe–17Mn–6Si–0.3C with High Silicon and High Manganese[J]. Acta Metallurgica Sinica (English Letters), 2014, 27(2): 352-358.

Figures/Tables 9

Table 1 Compositions and mechanical properties of experimental alloys

Alloy	Composition (wt%)				Mechanical property
Alloy	Mn	Si	C	Fe	σ_0.2^a(MPa)	σ_b^b(MPa)	δ^c (%)	A_k^d(J)
Fe–17Mn–6Si–0.3C steel	16.91	5.93	0.33	Bal.	307 ± 25	572 ± 28	10.4 ± 1.1	140 ± 8
Conventional Hadfield steel	12.88	0.53	1.08	Bal.	386 ± 3	719 ± 29	37.1 ± 0.2	223 ± 8

Fig. 1 a True stress-true strain curves. b Corresponding work hardening index (Crussard–Jaoul analysis)-true strain curves of Fe–17Mn–6Si–0.3C and conventional Hadfield steel

Fig. 2 Effect of the load on the weight losses of Fe–17Mn–6Si–0.3C steel and conventional Hadfield steel under the dry friction condition for 60 min

Fig. 3 Effect of the load on weight losses of Fe–17Mn–6Si–0.3C steel and conventional Hadfield steel under the abrasive friction for 10 min

Fig. 4 XRD patterns of the surfaces of specimens before and after wear. a Fe–17Mn–6Si–0.3C steel after solution treatment; b Fe–17Mn–6Si–0.3C steel after dry friction for 60 min under the load of 150 N; c Fe–17Mn–6Si–0.3C steel after abrasive friction for 10 min under the load of 150 N; d conventional Hadfield steel after abrasive friction for 10 min under the load of 150 N

Fig. 5 The surface OM micrographs of specimens of Fe–17Mn–6Si–0.3C steel before and after friction: a before friction; b after dry friction; c after abrasive friction

Fig. 6 SEM micrographs of the worn surface of conventional Hadfield steel a, b and high silicon high manganese steel c, d under the load of 150 N: a, c after dry friction for 60 min; b, d after abrasive friction for 10 min

Fig. 7 Schematic illustrations of wear processes during dry friction of Fe–17Mn–6Si–0.3C steel a, conventional Hadfield steel b

Fig. 8 Schematic illustrations of wear processes of the Fe–17Mn–6Si–0.3C steel a, conventional Hadfield steel b during abrasive friction

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