Szczegóły publikacji
Opis bibliograficzny
Copper infiltrated high speed steel based composites with iron additions — Infliltrowane miedzią kompozyty na osnowie stali szybkotnącej z dodatkiem żelaza / M. MADEJ // Archives of Metallurgy and Materials / Polish Academy of Sciences. Committee of Metallurgy. Institute of Metallurgy and Materials Science ; ISSN 1733-3490 . — 2009 — vol. 54 iss. 4, s. 1083–1091. — Bibliogr. s. 1091
Autor
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 50887 |
|---|---|
| Data dodania do BaDAP | 2010-03-11 |
| Tekst źródłowy | URL |
| Rok publikacji | 2009 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Archives of Metallurgy and Materials |
Abstract
High hardness, mechanical strength, heat resistance and wear resistance of M3/2 grade high speed steel (HSS) make it an attractive material for manufacture of valve train components [1,2]. In this application, the material must exhibit resistance to oxidation, high hot strength and hardness, and superior wear resistance. Metal matrix composites were produced by the infiltration technique. Since technological and economical considerations are equally important, infiltration of high-speed steel based skeleton with liquid cooper has proved to be a suitable technique whereby fully dense material is produced at low cost [1÷5]. An ability to press and sinter to near net shape requires good compressibility of the powder. Even after annealing, tool steel powders can be pressed to only about 80% of the theoretical density by most commercial facilities. On sintering and infiltration, little or no shrinkage can be tolerated and so the necessary strength and toughness may be achieved without removal of the remaining porosity. A reasonable compromise between all of these requirements may be achieved by using mixtures of high speed steel powders with softer low alloy or pure iron powder. During sintering and infiltration of such mixtures, interdiffusion of both carbon and metallic alloying elements occurs. Infiltration is a process that has been practiced for many years. It is defined as "a process of filling the pores of a sintered or unsintered compact with a metal or alloy of a lower melting point" [6,7]. In the particular case of copper infiltrated iron and steel compacts, the base iron matrix, or skeleton, is heated in contact with the copper alloy to a temperature exceeding the melting point of copper, normally to between 1095 and 1150°C. Attempts have been made to establish the influence of the production process parameters and amount of alloying additives, such as iron and electrolytic cooper, on the microstructure and mechanical properties of copper infiltrated HSS based composites.
