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Machine translation
1. (WO1981001673) PROCESS FOR MANUFACTURING SHELL-MOULDED METAL PIECES AND UTILISATION THEREOF
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/001673    International Application No.:    PCT/AT1980/000034
Publication Date: 25.06.1981 International Filing Date: 09.12.1980
IPC:
B22D 19/06 (2006.01)
Applicants:
Inventors:
Priority Data:
7858/79 13.12.1979 AT
Title (EN) PROCESS FOR MANUFACTURING SHELL-MOULDED METAL PIECES AND UTILISATION THEREOF
(FR) PROCEDE DE FABRICATION DE PIECES METALLIQUES COULEES EN COQUILLE ET LEUR UTILISATION
Abstract: front page image
(EN)To obtain castings having areas with improved wear resistance, substances which cause with the melt a local alloy effect are introduced in the mould. A base metal is used which is comprised of manganese austenitic steel and porous bodies of ferroboron. To this effect, the finally divided ferroboron is mixed with an aqueous solution of alkaline silicate and optionally with other hard materials, and the mixture is foamed by heating preferably in core boxes, and the hardened bodies are introduced in the mould areas where they are to cause a local alloy effect. The use of such hard castings for bucket tip s and/or edges of power shovels has given very good results.
(FR)Pour obtenir des pieces coulees ayant des zones de resistance a l"usure accrue, on introduit dans le moule des corps qui provoquent avec le metal fondu un effet d"alliage localise. On utilise un metal de base com pose d"acier austenitique au manganese et des corps poreux en ferrobore. A cet effet, on melange le ferrobore finement divise avec une solution aqueuse de silicate alcalin et eventuellement avec d"autres materiaux durs, on fait mousser le melange en chauffant de preference dans des boites a noyau et on introduit les corps durcis dans les zones du moule ou ils doivent provoquer un effet d"alliage localise. L"utilisation de telles pieces coulees dures pour des becs et/ou bords de godet de pelles mecaniques a donne de tres bons resultats.
Designated States:
Publication Language: German (DE)
Filing Language: German (DE)