Manufacturing process of a metallic component for an injector for injecting hydrogen, and an injector with such a component

Abstract

The present invention relates to a manufacturing method for a metallic component for an injector for injecting hydrogen, in particular a metallic component of an actuator unit of the injector, wherein in the method the metallic component is subjected to a heat treatment, in particular a tempering step, and the heat treatment comprises a hardening step at a temperature of at least 1030 °C, preferably at least 1040 °C and preferably at least 1050 °C, for a duration of at least 1 hour, preferably at least 2 hours and preferably at least 3 hours, a deep-freezing step at a temperature of not more than -70 °C, preferably not more than -80 °C and preferably not more than -90 °C, for a duration of at least 30 minutes, preferably at least 60 minutes and preferably at least 90 minutes, and a tempering step at a temperaturewhich is above the secondary hardening maximum of the metallic component, preferably at least 5 °C, more preferably at least 10 °C and particularly preferably at least 20 °C above the temperature of the secondary hardening maximum of the metallic component, for a duration of at least 8 hours, more preferably at least 12 hours and more preferably at least 15 hours.

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