A review has been prepared of the metallurgical factors affecting the hardenability and mechanical properties of boron-treated low-alloy steels. Detailed experimental work has been carried out to clarify the following controversial aspects of these steels: (a) occurrence of boron in steels; (b) influence of boron content on hardenability; (c) interaction of carbon and boron on hardenability; (d) case carburizing of boron steels; (e) impact properties of boron steels; (f) loss of hardenability in boron steels due to high-temperature heat treatments
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