Method for handling hard metal

摘要

The present invention relates to a method for sorting hard metal characterised by comprising the steps:
(a) subjecting one or more bodies comprising hard metal to a heat treatment, at a temperature of 500 °C or higher, in an atmosphere comprising at least one reactive gas component prone to form a reaction product with an element that may or may not be present in the one or more bodies, and
(b) performing a sorting operation of the one or more bodies based on a presence or absence of the reaction product in a surface portion of the heat treated one or more bodies.