公开(公告)号：US3921671A

公开(公告)日：1975-11-25

申请号：US53318574

申请日：1974-12-16

Applicant: ASEA AB

Inventor： GRANSTROM STAFFAN ,  GORANSSON INGEMAR

IPC: B22D37/00 ,  B22D41/14 ,  B22D41/50 ,  F16K31/06 ,  F15B21/00

CPC classification number: B22D41/14 ,  Y10T137/2082 ,  Y10T137/6579

Abstract: An electromagnetic valve for molten metal has means for forming a magnetic flux field transversely across the hole of a refractory nozzle through which molten metal can flow, and two electrodes extend through the nozzle transversely with respect to the hole and that flux field, the electrodes having cooling means and being made at least mainly of copper, each electrode having an inner end contacted by the metal for passing a current through the metal and thereby controlling the metal flow through the nozzle hole. Each electrode''s inner end is protected by a composite cladding formed by an inner layer that is, like the electrode, mainly copper, and an outer layer of a metal that is more wear-resistant, but less heat-conductive, than the inner layer, the two layers of the cladding being weld-bonded together so that they are inseparable. The inner layer having the same or substantially the same composition as the electrode, is fixed to the electrode by a film of solder which is protected from the heat of the metal, by the rapid transfer of this heat to the electrode having the cooling means, the solder film being sandwiched between the electrode and inner layer of the cladding, both of which are mainly copper and, therefore, of high heat conductivity.

Abstract translation: 一种用于熔融金属的电磁阀具有横向穿过熔融金属可流动的耐火喷嘴的孔形成磁通场的装置，并且两个电极相对于孔横向延伸穿过喷嘴，并且该磁通场具有 冷却装置并且至少主要由铜制成，每个电极具有与金属接触的内端，用于使电流通过金属，从而控制通过喷嘴孔的金属流。 每个电极的内端由复合包层保护，所述复合包层由内层形成，所述内层与电极类似，主要是铜，以及与内层相比更耐磨，但导热性更差的金属外层， 将两层包层焊接在一起使得它们是不可分离的。 具有与电极相同或基本相同的组成的内层通过被保护免受金属热量的焊料膜通过快速传递到具有冷却装置的电极而固定到电极上， 焊料膜夹在电极和包层的内层之间，两者都主要是铜，因此导热性高。