Rare earth metals and alloys from desulfurization in the steelmaking deoxidation, the content of both can be reduced to 0.001% or less, and change the shape of inclusions, grain refinement, thereby improving the workability of the steel, improve the strength and toughness , corrosion resistance and oxidation resistance. Metals and their alloys for ductile iron, gray cast iron and high-strength compacted graphite cast iron, graphite cast iron can change shape, improving the casting process, to improve the mechanical properties of cast iron. Adding a small amount of rare earth metals in the smelting bronze and brass alloys can improve the strength, elongation, heat resistance and electrical conductivity. 1% -1.5% of rare earth metals in the aluminum silicon alloy cast, high-temperature strength can be improved. The addition of rare earth metals to aluminum alloy wires improves tensile strength and corrosion resistance. The addition of 0.3% rare earth metal to Fe-Cr-Al electrothermal alloy can improve the oxidation resistance and increase the resistivity and high temperature strength. The addition of rare earth metals to titanium and its alloys can refine grains, reduce creep rate, and improve high temperature corrosion resistance. Microsphere molecular sieve prepared by using lanthanum mixed rare earth chloride and cerium -rich rare earth chloride for petroleum catalytic cracking process. Rare earth metal and transition metal composite oxide catalysts are used for oxidative purification to convert carbon monoxide and hydrocarbons into carbon dioxide and water. Pr Nd cycloalkyl - aluminum alkyl - alkyl aluminum chloride catalyst used in the ternary system of synthetic rubber. Rare earth polishing powder is used for polishing various glass devices. A single high-purity rare earth oxide is used to synthesize various phosphors, such as fluorescent materials such as color television red phosphors and projection television white phosphors. For producing a rare earth metal iodide metal halide lamp, instead of the stick of carbon arc lamp as the illumination source. A rare earth- cobalt hard magnetic alloy prepared from a rare earth metal has the advantages of high remanence and high coercivity. Yttrium iron garnet ferrite is a single or polycrystalline ferromagnetic material made of high purity Y 2 O 3 and iron oxide. They are used in microwave devices. High purity Gd 2 O 3 is used to prepare yttrium gallium garnet, and its single crystal is used as a substrate for magnetic bubbles. The LaNi 5 hydrogen storage material made of metal ruthenium and nickel has a fast hydrogen absorption and hydrogen release rate, and can store 6.5-6.7 moles of hydrogen per mole of LaNi 5 . In the atomic energy industry, the neutron absorption cross section of the isotope of thorium and thorium is used as a control rod and neutron absorber for light water reactors and fast neutron breeders. As a trace fertilizer, rare earth elements have an effect on crop yields. Flint is the traditional use of rare earth pyrophoric alloys, and it is still an important use of rare earth metals.
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