| 摘要 |
<p>According to the present invention there is now provided a method of making a sintered tianium-based carbonitride alloy. According to the method melt-metallurgical raw materials containing the metallic alloying elements for hard constituent forming as well as binder phase forming elements are melted and cast, using no intentional additions of the elements C, N, B and O, to a pre-alloy which in solidified condition essentially consists of brittle intermetallic phases with hard constituent forming and binder phase forming elements mixed in atomic scale. The pre-alloy is crushed and/or milled to powder with grain size < 50 mu m. The powder is carbonitrided for simultaneous formation in situ of extremely fine-grained, < 0.1 mu m, hard constituent particles enclosed in their binder phase. The obtained powder is milled together with lubricant and possible additions of powders of metals, carbides and/or nitrides from the groups IV, V or VI in the periodic table in order to obtain desired final analysis after which the powder mixture is compacted and sintered. <IMAGE></p> |
