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Alloying additions of 0.25–1.0 wt‐% B to austenitic manganese steels lead to the formation of carboborides arranged in a cell‐type microstructure. Pin abrasion tests on flint grinding paper using different dead weight loads reveal that these carboborides do not substantially improve the wear resistance due to a relatively low hardness and weak bonding to the austenite matrix. However, carboborides hardened by V, e.g., can considerably increase the abrasive wear resistance. They are very effective in a metastable austenitic matrix in which friction‐induced martensitic transformation occurs. It is the consequence of compressive stresses in the martensitic surface layer which improve the anchoring of insufficiently bonded carboborides in the matrix.

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