Method for manufacturing a metal composite component, in particular for an electromagnetic valve

摘要

A method for manufacturing a metal composite component is characterized in that the composite component (60) is provided with at least two sections (61, 62, 63) of different magnetization, at least two sections (61, 62, 63) being situated on the one-piece component (60) in direct succession. The starting material for manufacturing the composite material (60) is a semi-austenitic steel, which is provided as a cylindrical blank. The blank is subsequently shaped into an intended shape of the composite component (60) and rendered magnetizable in a multistage forming and/or heat treatment process, the heat treatment being performed in such a way that the component has a saturation polarization Js=0.9-1.5 T. This is followed by a local heat treatment in a partial area under simultaneous cooling of the areas of the composite component (60) where the magnetic properties are not to be changed, in order to define strictly delimited transitional areas between the different areas of magnetization (61, 62, 63). The composite component (60) is suitable in particular for use in electromagnetic valves, for example, including in fuel injectors of internal combustion engines.

主权项

1. A method for manufacturing a metal composite component that includes a one-piece component, the composite component being provided with at least two sections of different magnetization, the at least two sections being situated on the one-piece component in direct succession, the method comprising: shaping a semi-austenitic steel blank into an intended shape of the composite component and rendering it magnetizable in a heat treatment process, the heat treatment being performed in such a way that the component has a saturation polarization Js=0.9-1.5 T, wherein a terminal local heat treatment is performed in a partial area under simultaneous cooling of the areas of the composite component where the magnetic properties are not to be altered, wherein the local heat treatment is performed in the partial area in such a way that the partial area has a saturation polarization of one of Js=0 T and Js in a range of 0.01 to 0.3 T, and wherein the composite component is shaped in such a way that it has the form of a hollow cylindrical sleeve.