Herstellungsverfahren für Werkzeuge mit einer mit der 3D-Drucktechnologie aus Metall Hergestellten Arbeitsschicht und mit Diesem Verfahren Hergestelltes Metallwerkzeug

Details

Veröffentlichungs-Nr.

EP4729209

Anmeldetag

18. November 2024

Veröffentlichung

22. April 2026

Rechtsraum

EP

Abstract

Method of manufacturing tools with a working layer prepared from metal with a 3D printing technology, according to the invention is characterised in that a base plate made of structural steel, preferably a S235, is mounted within a workspace of a 3D printer, then a printer chamber is purged with argon with simultaneous measurement of oxygen concentration in the printer chamber until the oxygen concentration in the printer chamber reaches below 0.02% with simultaneous heating of the plate to temperature of 100°C, then with use of laser with power ranging from 80 to 120 Watts, with scanning speed of 400 to 600 mm/s, with spot size of 0.1 mm and with a single layer thickness of 0.03 mm, components of a specified geometry and overall dimensions not exceeding values of 100x100x100 mm are printed, wherein, in order to achieve appropriate welding of the working layer to the base, three to five initial layers of the printed component are each scanned with a laser in triplicate, while the following layers of powder feed are scanned once, and in addition printing of the following layers is performed with the rotation of the scanning laser path by 67°, then printed component together with the shaft part made of structure steel is heat treated in temperature of 800 to 850°C in the argon protective atmosphere for time period ranging from 1 to 4 hours depending on the overall dimensions, then heat treated component is rapidly cooled down in water which initial temperature is in range of 18 to 25 °C while swirling the water until the component reaches a room temperature, then the component is subjected to aging process at temperature from 530 to 570 °C for period of time from 1 to 2 hours in the argon protective atmosphere and is air cooled.Hybrid metal tool according to the invention is characterized in that it comprises a base part having a cylindrical shape of overall dimensions not exceeding 100x100x100 mm that was manufactured by machining method from structural steel, for example S235, and working part manufactured on the surface of the base part by 3D printing with DMLS method from Maraging M300 steel of overall dimensions not exceeding 100x100x100 mm, having relative porosity not exceeding 0.5%, hardness in range of 50-60 HRC (500-700 HV), and of roughness parameter Ra achieved after 3D printing with DMLS method ranging from 2.5 do 10 µm.

Anmelder

Firma

Akademia Gorniczo-Hutnicza im. Stanislawa Staszica w Krakowie

Land

🇵🇱 Polen