Selection of optimum quenching temperatures for some tooled steels
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Heavy-load cold-worked tools must be quenched so as to produce primary hardness (Table 1).
The size of the actual austenite grain coupled with hardness can be used as a criterion for the quality of the heat treatment of tool steels. The grain size must be determined with a magnification of 500.
It is advisable to amend and add a further section to the GOST 5639-51 State Standards on detection of the true austenite grain boundaries in steels which have a martensite structure after quenching.
KeywordsGrain Size Heat Treatment Austenite Martensite State Standard
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