Machinability evaluation of pre-hardened plastic mould steels

Autor:	Anders Kinnander, Hamed Hoseiny, Uta Klement, Berne Högman
Rok vydání:	2012
Předmět:	Toughness Materials science Impact toughness Machining Mechanics of Materials Mechanical Engineering Machinability Metallurgy Composite material Industrial and Manufacturing Engineering
Zdroj:	International Journal of Machining and Machinability of Materials. 11:327
ISSN:	1748-572X 1748-5711
DOI:	10.1504/ijmmm.2012.047834
Popis:	There are multiple demands placed upon plastic mould steels, depending on the application they will have. Among these requirements, machinability has generally a great economic importance in mould steels and in pre-hardened mould steels in particular. The machining cost can exceed more than half of the cost of a mould. Nevertheless, to avoid subsequent heat treatment, distortion and dimensional inaccuracy, there has been the tendency to use even higher hardness in the pre-hardened mould steels, a hardness range of 38-40 HRC instead of 30-32 HRC. In this work, machinability of some of the most popular grades of pre-hardened plastic mould steel at 38-40 HRC is compared in two milling and two drilling operations. The materials have shown very different properties in different machining operations. This, beside the high requirements upon the plastic mould steels, such as polishability, hardness, impact toughness etc. makes it very complicated to improve these types of steels to be superior in all mould applications.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8db7fa2b61263114d82c34c1333b03c7 https://doi.org/10.1504/ijmmm.2012.047834 Zobrazit plný text záznamu