Variation of the composition, structure, and hardness of cementite with quenching

Autor:	B. Ya Ul'yanova, V. A. Shalashov, A. A. Zhukov, V. K. Tomas
Rok vydání:	1970
Předmět:	Austenite Ledeburite Materials science Cementite Metallurgy Metals and Alloys engineering.material Condensed Matter Physics Indentation hardness Carbide chemistry.chemical_compound chemistry Mechanics of Materials engineering Hardening (metallurgy) Tempering Pearlite
Zdroj:	Metal Science and Heat Treatment. 12:16-18
ISSN:	1573-8973 0026-0673
DOI:	10.1007/bf00651707
Popis:	1. With quenching of white synthetic cast irons (Fe−C and Fe−C−Cr) from temperatures up to 1000°C the cementite lattice is distorted, the volume of the unit cell decreases, the carbon content decreases, and the microhardness increases considerably. The phenomenon is reversible, and the observed effects of the hardening of cementite are removed by high-temperature tempering. 2. The fact that the results contradict earlier results can be explained by the completing processes — the effect of hardening of the carbide phase and the initial stages of graphitization occurring at high temperatures, particularly in commercial cast irons containing silicon. 3. The investigation confirmed Baikov's assumption that cementite is a phase of variable composition. With increasing temperatures cementite approaches austenite in its carbon concentration and the chains of octahedral cells of the iron sublattice.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::96ae66f3efbf289e8d62cd321238e492 https://doi.org/10.1007/bf00651707 Zobrazit plný text záznamu Full text from SpringerLink