| 摘要 |
The invention relates to a steel material having a high silicon content, and to a method for the production thereof, said steel material being particularly suitable for piston rings and cylinder sleeves. In addition to iron and production-related impurities, said steel material contains 0.5 to1.2 wt.% carbon, 3.0 to 15.0 wt.% silicon and 0.5 to 4.5 wt.% nickel. Also, said steel material can contain small amounts of the following elements Mo, Mn, Al, Co, Nb, Ti, V, Sn, Mg, B, Te, Ta, La, Bi, Zr, Sb, Ca, Sr, Cer, rare earth metals and nucleating agents such as NiMg, NiSiMg, FeMg and FeSIMg. Due to the high Si content, a degree of saturation higher than 1,0 is attained, with the melting temperature of the steel material corresponding to normal cast iron. The steel material can be produced according to a conventional cast-iron technique and has a high resistance to wear and tear and a high structural strength (minimal distortion). |
