Process for obtaining a fine-grained martensitic structure component

Matteo Villa (Inventor), Thomas Lundin Christiansen (Inventor), Kristian Vinter Dahl (Inventor), Marcel A. J Somers (Inventor)

Research output: Patent

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Abstract

The disclosure relates to a process for the manufacture of a steel component comprising a fine-grained martensite structure component. The process comprises the steps of providing a steel component having an initial steel composition; introducing nitrogen into the steel component at a temperature T1 above 950°C, thereby creating an at least partly austenitic nitrogen-containing steel component; bringing the at least partly austenitic nitrogen-containing steel component to a temperature T2, such that austenite is decomposed into a steel component comprising at least an amount of carbon- and/or nitrogen-containing precipitates; bringing the steel component comprising at least an amount of carbon- and/or nitrogen-containing precipitates to a temperature T3 which is above T2, thereby creating an at least partly austenitic nitrogen-containing steel component optionally comprising at least an amount of carbon- and/or nitrogen-containing precipitates; and bringing the at least partly austenitic nitrogen-containing steel component to a temperature T4 that is below a martensite start temperature of the at least partly austenitic nitrogen-containing steel component for initiating transformation of at least some of the austenite into fine-grained martensite, thereby producing a steel component comprising a fine-grained martensite structure component.

Original languageEnglish
IPCC22C 38/ 18 A I
Patent numberWO2023281022
Filing date08/07/2021
Country/TerritoryInternational Bureau of the World Intellectual Property Organization (WIPO)
Priority date08/07/2021
Priority numberEP20210184529
Publication statusPublished - 12 Jan 2023

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