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A unique feature is its direct connection to S.A. Echevarría, whose technical experts José Huguet and Valentín Pomposo collaborated with Apraiz Barreiro to prepare this book. The foreword, written by a company colleague, reflects on the challenges and advancements in establishing modern steel production in Spain. The book thoroughly covers the theoretical foundations of transformations in steel, practical applications of all key processes, the influence of alloying elements, and the equipment used for heat treatment.
Rapid cooling to form Martensite , drastically increasing hardness but introducing brittleness. The foreword, written by a company colleague, reflects
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José Apraiz Barreiro fue un destacado ingeniero y catedrático español cuya capacidad pedagógica transformó la enseñanza de la metalurgia. Su enfoque no solo se limitaba a la teoría científica pura, sino que conectaba directamente las transformaciones atómicas del acero con los resultados prácticos exigidos en los talleres industriales y las fábricas de maquinaria. Estructura y Contenido Clave del Libro
is arguably the most authoritative Spanish-language reference on ferrous metallurgy and thermal processing. First published in the mid-20th century and revised multiple times, it remains a cornerstone for engineers, metallurgists, and technicians. This article distills its core principles, methods, and practical wisdom. or holding in that range
Apraiz warns that slow cooling through 450–550°C after tempering, or holding in that range, can cause intergranular fracture in alloy steels (especially with Mn, Cr, Ni, Sb, P). Rapid cooling through that range avoids it.
Softening the steel and relieving internal stresses.