Evaluation of the capability of spray forming for the production of very high alloyed steels without necessity of heavy hot working
Spray forming (SF) is a new production route for high-alloyed steels. The aim of the project was the production of high-alloyed complex steels by this technique and the comparison of the materials quality with materials from established production routes. Therefore, medium-sized billets from X210Cr12, X220CrVMo13-4, X290Cr12, HS6-5-2C, X40CrMoV5-1, X2CrNiMoN22-5-3 and X6Cr17 steels are spray formed and processed to semi-finished material at low degree of deformation. The results show a wide capability of spray forming to produce complex steels on a high technological level. The analysis of the semi-finished products has focused on microstructure, strength, impact toughness, thermal fatigue resistance and wear resistance. The tool steels show equivalent behaviour during heat treatment. Their microstructure is homogenous with small-sized carbides in SF quality, while there are lines of large carbides in cast (C) quality. SF includes randomly distributed larger sized carbides than PM. Originating from these microstructural differences impact toughness and bending strength as well as their isotropy ascends from the state of C via SF to PM quality. Concerning wear resistance the observed differences among the production routes in general are small. Stainless steel qualities show similar mechanical behaviour to conventionally produced material despite low degree of deformation. 'Tailoring' high quality material in small heats is therefore possible, thus giving the chance of production of application-adapted alloys on demand. Together with the capability of spray forming to produce freestanding shapes and reduced need of hotworking, it might become an advantageous way of producing complex tools and components.
Bibliographic Reference: EUR 22438 EN (2007), 254 pp. Euro: 35
Availability: Katalogue Number: KI-NA-22438-EN-S The paper version can be ordered online and the PDF version downloaded at: http://bookshop.europa.eu
ISBN: ISBN: 978-92-79-04955-2
Record Number: 200719214 / Last updated on: 2007-07-05
Original language: en
Available languages: en