초록 ▼

A surface layer for forming a cylinder barrel wall of a combustion engine block is proposed. The surface layer has separate phases of components that are separated from the phase of the remaining materials. The surface layer is produced by plasma spraying an iron containing spraying powder, incorpor

A surface layer for forming a cylinder barrel wall of a combustion engine block is proposed. The surface layer has separate phases of components that are separated from the phase of the remaining materials. The surface layer is produced by plasma spraying an iron containing spraying powder, incorporating all components of the layer to be produced. Such a surface layer may be applied easily and shows a significantly improved behavior regarding the machining thereof, without negatively influencing other important characteristics of the layer material, like wear resistance and coefficient of friction vis-a-vis the material of the piston rings. Preferred components of the spraying powder are, besides Fe, Cr, MN, S and C. Moreover, the spraying powder can contain As, Te, Se, Sb and/or Bi.

대표청구항 ▼

1. A spraying powder for producing a surface layer adapted to form a cylinder barrel surface of a combustion engine cylinder block, said surface layer comprising separate phases of components that are separated from the phase and phases, respectively, of the remaining surface materials, and said sur

1. A spraying powder for producing a surface layer adapted to form a cylinder barrel surface of a combustion engine cylinder block, said surface layer comprising separate phases of components that are separated from the phase and phases, respectively, of the remaining surface materials, and said surface layer being formed by plasma spraying said spraying powder, said spraying powder containing all components of the surface layer to be formed and having the following composition: TBL Cr = 0.1% to 18.0% by weight Mn = 0.1% to 6.0% by weight S = 0.01% to 0.5% by weight C = 0.1% to 1.2% by weight Fe = difference to 100% by weight. 2. A spraying powder according to claim 1, having the following composition: TBL Cr = 0.1% to 3.0% by weight Mn = 0.3% to 1.5% by weight S = 0.05% to 0.3% by weight C = 0.8% to 1.2% by weight Fe = difference to 100% by weight. 3. A spraying powder according to claim 2, further containing one or more of the following components: TBL As = 0.001% to 0.01% by weight Te = 0.001% to 0.01% by weight Se = 0.001% to 0.01% by weight Sb = 0.001% to 0.01% by weight Bi = 0.001% to 0.01% by weight. 4. A spraying powder according to claim 2, further containing 0.01% to 0.5% by weight Pb. 5. A spraying powder according to claim 1, for producing a surface layer having corrosion resistive properties under the impact of sulfuric acid and formic acid and having the following composition: TBL Cr = 12.0% to 15.0% by weight Mn = 0.3% to 1.5% by weight S = 0.05% to 0.3% by weight C = 0.35% to 0.6% by weight Fe = difference to 100% by weight. 6. A spraying powder according to claim 5, further containing one or more of the following components: TBL As = 0.001% to 0.1% by weight Te = 0.001% to 0.1% by weight Se = 0.001% to 0.1% by weight Sb = 0.001% to 0.1% by weight Bi = 0.001% to 0.1% by weight. 7. A spraying powder according to claim 5, further containing 0.01% to 0.5% by weight Pb. 8. A spraying powder according to claim 1, further containing one or more of the following components: TBL As = 0.001% to 0.1% by weight Te = 0.001% to 0.1% by weight Se = 0.001% to 0.1% by weight Sb = 0.001% to 0.1% by weight Bi = 0.001% to 0.1% by weight. 9. A spraying powder according to claim 1, further containing 0.01% to 0.5% by weight Pb. 10. A spraying powder according to claim 8, further containing 0.01% to 0.5% by weight Pb.