| 摘要 |
<p>Rods and shaped parts are produced from a mxit. of metal powders, which are electrically conducting, by inductive sintering. A refractory ceramic mould is filled with the powder mixt. the mould being located on a rotating table, and an induction coil is moved over the mould contg. the powders, using a fixed-cycle operation in which the cycle depends on the sintering temp. the time required to heat the respective powder combination and on the thickness of the final rod. Pref. the mould is filled automatically. The mixt. is sintered by moving an induction coil over the open mould and the sintered rod is removed manually while a new mould is filled simultaneously with the powder mixt. To avoid oxidn. of the powder mixt. during sintering the mould is rinsed with an inert or slightly reducing gas using the same fixed-cycle operation. The rods and shaped parts are suitable for welding and brazing and esp. for prodn. of wear resitant coatings. The prodn. is continuous and suitable for powder combinations contg. WC and B nitride. Sinter temps. are controlled.</p> |
