Abstract:
Herein provided is a machine for forming metal bars, in particular suitable for melting and the subsequent continuous solidification of a precious metal such as gold, silver, precious alloys, as well as other pure metals or different alloys, in form of powder, grits or swarf of various sizes, for producing ingots having weight varying from 50 g to 50 kg. In particular such machine has six operating stations (101 - 106), arranged in succession.
Abstract:
본 발명은 용탕 표면에 안정한 보호 피막을 형성하여 대기 중 혹은 일반적인 불활성 분위기 에서도 용해 및 주조가 가능하고, 발화 저항성이 매우 우수하여 칩의 자연발화를 억제할 수 있을 뿐 아니라 우수한 강도와 연성을 동시에 갖는 마그네슘 합금에 관한 것이다. 본 발명에 따른 마그네슘 합금은 7.0중량 % 내지 11.0중량 %의 A1, 0.05중량% 내지 2.0 중량 %의 Ca, 0.05중량 % 내지 2.0중량%의 Y와, 0중량 % 초과 6중량 % 이하의 Zn과, 잔부인 Mg 및 기타 불가피한 불순물을 포함하고, 상기 Ca와 Y의 합산 함량은 전체 마그네슘 합금의 전체 중량 대비 0. 1중량 % 이상 2.5중량% 미만인 것을 특징으로 한다.
Abstract:
Die Erfindung betrifft ein Verfahren zum Kippgießen von Bauteilen, in welchem mindestens eine Gießform (3a, 3b) zur Aufnahme einer Metallschmelze mit mindestens einem Gießtümpel (6a, 6b) aus einer Grundstellung in einer ersten Schwenkrichtung um einen ersten Schwenkwinkel in eine erste Schwenkstellung geschwenkt wird. Die Gießform (3a, 3b) wird gesäubert oder geschlichtet, oder mindestens ein Kern wird eingelegt. Die Gießform (3a, 3b) wird in einer zweiten, der ersten Schwenkrichtung entgegengesetzten Schwenkrichtung die Grundstellung durchlaufend oder in der ersten Schwenkrichtung in eine zweite, von der ersten verschiedene Schwenkstellung geschwenkt, in welcher die Gießform einen zweiten Schwenkwinkel aufweist. Der eine Gießtümpel (6a, 6b) wird mit einer flüssigen Metallschmelze gefüllt. Anschließend wird die mindestens eine Gießform (3a, 3b) zusammen mit dem Gießtümpel (6a, 6b) in entgegengesetzter Richtung derart in die Grundstellung geschwenkt, dass die Schmelze laminar in die Gießform (3a, 3b) einfließt. Des Weiteren wird eine insbesondere zur Durchführung des Verfahrens geeignete Kippgießvorrichtung offenbart.
Abstract:
The present invention resides in a method of manufacturing a bearing ring (101) for a rolling element bearing, wherein the bearing ring comprises a bearing race (102) made of a bearing grade steel and an overmoulded part (106) that is preferably made of a lightweight metal such as aluminium or a thermoplastic material such as polyamide. According to the invention, the method comprises a step of hardening at least a raceway surface (103) of the bearing race prior to a step of joining the overmoulded part (106) to the bearing race (102) in a moulding process. In a further development, the method comprises a step of temperature control, to ensure that the temperature of the raceway surface (103) is kept below a predetermined value during the moulding process.
Abstract:
A method for forming a reinforced metal matrix includes the steps of: (a) at least partially melting a metal or metal alloy, (b) adding basalt fibres to the melt of step (a) at a proportion from 1 to 10wt%, and (c) stirring the basalt fibres and melt of step (b) at a rate from 400 to 1200rpm for a time from 1 to 60 minutes. The result may be improved by sonicating the basalt fibres and melt of step (c) and by casting the product into a preheated mould.