| 摘要 |
<p>The invention concerns a method for the manufacturing of a wire-shaped product with high wear resistance. The characteristic feature is that a melt is prepared of a martensitic stainless chromium steel which contains in weight-% 0.6-3.0 C, max 2.0 Si, max 2.0 Mn, 13-30 Cr, 0-10 Mo, from zero to totally max 10 % of those strong carbide forming elements which belong to the group of elements which comprises V, Nb, Ta and Zr, totally max 1 % of other, optionally existing alloying elements, balance iron and unavoidable impurities, that the melt is tapped and caused to solidify through cooling at a cooling rate of at least 100 °C/s so that a solidified material is obtained which contains evenly distributed carbides, wherein essentially all existing carbide particles has a maximal particle size of 8 νm, particle size being defined as the mean value of the length and breadth of a particle observable in a light-optical microscope, and that an intermediate product is formed of said material in the form of a wire which is cold drawn and optionally is cold-rolled to desired final dimension, whereafter the wire is hardened and tempered for the achievement of said wire-shaped product which has a microstructure substantially consisting of tempered martensite containing carbides with a particle size of max 8 νm. The invention also concerns the wire-shaped product and its use for wear parts in combustion engines.</p> |
