INVESTIGATION OF THE PHYSICO-CHEMICAL INTERACTIONS OF RARE-EARTH METALS WITH IRON AND STEEL

Journal Article · Thu Jan 01 04:00:00 EST 1959 · Redkozemel. Eleementy v Stalyakh i Splavakh, Trudy Soveshchaniya

OSTI ID:4040012

Savitskii, E M; Terekhova, V F; Tsikalov, V A

The interaction of rare-earth metals, such as La and Ce, with S, 0, Sl, and C of steel and the effect of Ce and La on the mechanical propertles of Fe were studied. The Fe-La system, wlth up to 2 wt% La, was studled by microscopic, electronmicroscopic, and mechanical methods. It is established that small additions of rare-earth metals (0.2 to 0.5%) refine considerably the structure of iron and steel. Rareearth metals are strong deoxidizers whlch cause the finelydispersed dlstribution of oxide impurities. The addition of 0.2 to 0.5% rare-earth metals to steel containing S> 0.1% causes considerable desulfurization. At a S content < 0.02 to 0.03%, desulfurlzation ls not observed. The presence of <0.2% Si in the steel does not reduce the refining effect of Ce. The rare-earth metals introduced lnto the steel ln an amount of 0.9 to 1.5%, interact with C, forming carbides, and reduce considerably the perlite content in the steel. The addition of 0.1 to 0.2% rare-earth metals causes higher strength, ductility and a/ sub k/ of steel. An increase of the rareearth metal content from 0 to> 3% reduces the mechanical properties of iron and steel due to the formation of brittle intermetallic compounds. At a La content of > 0.4 to 0.5 wt%, a second phase is observed in the Fe-La system. Solubility of La in gamma -Fe is greater than in alpha -Fe. A considerable improvement of physico-mechanical properties of Fe-Al alloys was observed when rare-earth metals were introduced in an amount of up to 5 wt%. (OTS)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-15-022643
• OSTI ID: 4040012
• Journal Information: Redkozemel. Eleementy v Stalyakh i Splavakh, Trudy Soveshchaniya, Journal Name: Redkozemel. Eleementy v Stalyakh i Splavakh, Trudy Soveshchaniya
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALUMINUM ALLOYS
CARBON
CERIUM
CHEMICAL REACTIONS
DUCTILITY
ELECTRON MICROSCOPY
INTERMETALLIC COMPOUNDS
IRON
IRON ALLOYS
LANTHANUM
MECHANICAL PROPERTIES
METALLOGRAPHY
METALS, CERAMICS, AND OTHER MATERIALS
OXYGEN
RARE EARTHS
SILICON
STEELS
SULFUR
TENSILE PROPERTIES