| 摘要 |
<p>Foil-like metal strip comprises hard particles embedded in a metal matrix of gp. VIIIA element(s) gp. IVA, VA or VIA element(s) and at least one of B, C, Si and P, the hard particles being prim. pptes near surface of the strip and the strip having a thickness of max. 1 mm. and being produced from a melt using a cooling rate of at least 100 K/s. The novelty is that at least 50% of the hard particles have a skeleton-like crystal form with a length 1 width ratio of at least 5. In prodn. of the strip by melt spinning directly from a separately produced and remelted alloy, the novelty is that, in the separate alloy prodn. step, the parameters (e.g. melting atmos., chemical compsn., superheat, casting temp. and/or solidificn. rate) are chosen so that the hard particles already ppte. from the melt during solidificn. During strip mfr., a max. value for an empirically determined, energy input to the remelted alloy is maintained, the max. value being a function of the melting temp. and the time to solidificn. of the melt such that re-dissolution of the hard particles is at least partially avoided.</p> |
