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Steel, rare earth metals

Metallurgy. The strong affinity for oxygen and sulfur makes the rare-earth metals useflil in metallurgy (qv). Mischmetal acts as a trap for these Group 16 (VIA) elements, which are usually detrimental to the properties of steel (qv) or cast iron (qv). Resistance to high temperature oxidation and thermomechanical properties of several metals and alloys are thus significantly improved by the addition of small amounts of mischmetal or its siUcide (16,17). [Pg.547]

This well known alloy produced by fused chloride electrolysis of the light lanthanide elements constitutes over 90% of the rare earth metals (RE3 l s) consumed for steeLnaking in the western world. It is estimated that approximately 3,000 metric tons of mischmetal, worth about 35 million, are added to liquid steel every year,... [Pg.43]

Hirschhom I. S. "Use of Mischmetal (Mixed Rare Earth Metals) in Steels". Private Publ. 1 Ronson Metals Corp. 8/1968. [Pg.75]

Kippehan N. Gschneidner, K. A., Jr. "Rare Earth Metals in Steels", IS-RIC-I4 Rare Earth Information Center, Iowa State Univ., Ames, lA, 1970. [Pg.75]

In recent years, the use of rare earth metal salts as inhibitors has been gaining attention. Rare earth metal salts have been found to be effective inhibitors for the protection of aluminium alloys, mild steel and zinc. [Pg.898]

Steel 202 was treated with rare earth metals to modify the sulphide inclusions. The manganese and silicon concentrations are typical for silicon killed steels. [Pg.17]

Steel [103], titanium, zirconium, and their alloys [104], and rare earth metals and their compounds [8]. [Pg.174]

The pioneering work of Klemm and Bommer (1937) in which rare earth chlorides were reduced with K metal in a sealed glass tube resulted in a mixture of metal and KCl which they did not separate. They determined the lattice parameters and some of the magnetic properties of the rare earth metals in the presence of the KCl. Nolting et al. (1960) reduced YCI3 with Li vapor in a sealed stainless steel chamber in Ta crucibles. After the reduction of the YCI3 to Y metal was complete, one end of the chamber was cooled. The LiCl salt then distilled away from the Y crystals and condensed in the cool portion of the chamber. The Y was arc melted to consolidate the small crystals. The microstructure of the arc melted metal was clean. However, the interstitial impurity level was about 20 times higher than the laboratory scale metal prepared by the... [Pg.184]

All of the rare earth metals can be machined with the possible exception of Eu. However, specimens of Eu with various shapes can be produced by extrusion. The standard procedures for machining soft steels should be followed. The turnings of the light lanthanide metals and impure Sc, Y and heavy lanthanides metals ignite easily and burn white hot, therefore, they should not be allowed to accumulate on the lathe, drill, or other machining device. [Pg.207]

Although an Ni/Mo alloy melt does not wet a-BN, slow interface reactions are observed [20]. On the other hand, mutual wettability of materials sometimes is a first indication for chemical affinity. Thus, the wettability of a-BN by aluminium and aluminium alloys increased with increasing temperature a content of rare earth metals in the aluminium melt leads to a decrease of the wettability [21]. Reaction-bonded a-BN is completely eroded by liquid steel at 1650°C in an Ar atmosphere [22]. The contact angles formed on graphite substrates by molten lead di-chloride/alkali metal chloride mixtures do not change when the Ar atmosphere is replaced by CI2. However, when air is introduced complete wetting is observed after about five minutes. This is not the case with a boron nitride substrate [23]. [Pg.54]


See other pages where Steel, rare earth metals is mentioned: [Pg.324]    [Pg.147]    [Pg.420]    [Pg.423]    [Pg.572]    [Pg.14]    [Pg.18]    [Pg.43]    [Pg.53]    [Pg.168]    [Pg.644]    [Pg.18]    [Pg.1420]    [Pg.14]    [Pg.392]    [Pg.450]    [Pg.896]    [Pg.644]    [Pg.24]    [Pg.346]    [Pg.644]    [Pg.382]    [Pg.147]    [Pg.248]    [Pg.249]    [Pg.325]    [Pg.326]    [Pg.137]    [Pg.53]    [Pg.419]    [Pg.174]    [Pg.185]    [Pg.204]    [Pg.204]    [Pg.258]    [Pg.764]   


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Rare earths, metallic

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