초록 ▼

The present invention provides a method for consolidating rapidly solidified, transition metal alloys which includes the step of compacting a plurality of alloy bodies at a temperature ranging from about 0.90-0.99 Tm (melting temperature in °C.) for a time period ranging from about 1 min to 24 hours

The present invention provides a method for consolidating rapidly solidified, transition metal alloys which includes the step of compacting a plurality of alloy bodies at a temperature ranging from about 0.90-0.99 Tm (melting temperature in °C.) for a time period ranging from about 1 min to 24 hours. The alloy bodies contain at least two transition metal elements and consist essentially of the formula (Fe,Co and/or Ni)bal(W, Mo, Nb and/or Ta)a(Al and/or Ti)b(Cr)c(B and/or C)d(Si and/or P)e, wherein “a”ranges from about 0-40 at. %, “b”ranges from about 0-40 at. %, “c”ranges from about 0-40 at. %, “d”ranges from about 5-25 at. %, and “e”ranges from about 0-15 at. %. The alloy bodies also have a substantially homogeneous and optically featureless structure. A consolidated article produced in accordance with the present invention has increased ductility and toughness; with a tensile strength of at least about 1200 MPa and an impact resistance of at least 10 Joules (unnotched charpy test). The article is composed of a crystalline, transition metal alloy, which has an average grain size of greater than 3 micrometers and contains separated precipitate particles ranging from about 3-25 micrometers in average size.

대표청구항 ▼

A method for producing a consolidated article having increased toughness, comprising the steps of: (a) selecting a rapidly solidified alloy, which has been solidified at a quench rate of at least about 105°C./sec and has a substantially homogeneous, optically featureless alloy structure; (b) forming

A method for producing a consolidated article having increased toughness, comprising the steps of: (a) selecting a rapidly solidified alloy, which has been solidified at a quench rate of at least about 105°C./sec and has a substantially homogeneous, optically featureless alloy structure; (b) forming said rapidly solidified alloy into a plurality of separate alloy bodies; (c) heating said rapidly solidified alloy bodies to a temperature ranging from about 0.90-0.99 Tm (melting temperature measured in °C.) for a time period ranging from about 1 min. to about 24 hrs; and (d) compacting said rapidly solidified alloy bodies to produce a consolidated article composed of a crystalline alloy, which has an average grain size of greater than 3 micrometers and contains a substantially uniform dispersion of separate precipitate particles having an average size ranging from about 3-25 micrometers.