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The effect of low‐temperature coagulation of carbides on fracture toughness of high‐speed steels
Author(s) -
Pacyna Jerzy
Publication year - 1988
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.198801542
Subject(s) - carbide , austenite , metallurgy , materials science , fracture toughness , high speed steel , toughness , composite material , microstructure
It was observed that scratches on the surface of high‐speed steel tools constitute the more probable crack nucleus than fractured carbides. The undissolved carbides, however, affect strongly the process of crack development. It was proved that a decrease in the dispersion degree of carbides undissolved in high‐speed steels leads to the growth of fracture toughness. During low‐temperature coagulation, however, there are changes in the chemical composition of carbides which alter their stability during austenitizing.