公开(公告)号：WO1997022427A1

公开(公告)日：1997-06-26

申请号：PCT/EP1996005452

申请日：1996-12-05

Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. ,  LENK, Reinhard ,  RICHTER, Claus ,  HERMEL, Waldemar

Inventor： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

IPC: B22F03/22

CPC classification number: C22C1/051 ,  B22F3/225

Abstract: The invention relates to the field of the ceramic and hard metal industries and concerns a process for manufacturing hard metal parts, in particular those having a complex geometry, such as those used for example as machining tools and wear elements. The object of the invention is to create a process which allows the manufacture of hard metal parts with a complex geometry by using a stable dispersed hard metal-binder suspension, in which the binder is a thermoplastic binder having a viscosity of 3 to 6 mPas, and without using an organic solvent to eliminate the binder. For that purpose, a process is disclosed wherein a hard metal powder having an average corn size smaller than 2.0 mu m is mixed with a liquefied thermoplastic binder, the viscosity of the mixture being set upon a value of at least 100 mPas and up to 4000 mPas during the whole production and treatment process. The thus obtained stable disperse suspension is shaped into a moulded body from which the thermoplastic binder is then expelled and the binder-free shaped body is then sintered.

Abstract translation: 本发明涉及陶瓷和硬金属工业领域并涉及一种用于制备硬质金属部件，尤其是具有复杂几何形状，如例如 来作为所使用的编辑工具和Verschleisselemente。 本发明的目的是使用一个stabildispersen碳化物粘合剂悬浮液与具有粘度3-6·s的热塑性粘合剂并且不使用的一个或加尼奇溶剂脱粘合剂是提供一种方法，可以在具有复杂几何形状的硬质金属部件来制造。 的对象，其中，平均晶粒尺寸的硬质金属粉末是<2.0微米与液化热塑性粘合剂通过一种方法来实现，混合，其中该混合物的整个生产和加工到至少100毫帕·秒，并<的值时的粘度 4000毫帕·秒被设置，并且由此得到的悬浮液stabildisperse被处理以形成成型体，随后从热塑性粘合剂，然后将粘合剂成型体进行烧结排出。