ISSN:
1573-8973
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions 1. The addition of an optimum amount of rare earth oxides (0.08%) to liquid steel has the following effects: a) It improves the surface of the ingots and the rolled material and decreases the cost of cleaning the ingots and billets about 18%. b) It fragments the macro- and the microstructure of the steel, decreases the amount of ferrite and the susceptibility to intercrystalline corrosion, improves the deformability, and increases the amount of usable metal (by approximately 0.5%). 2. The ductility of the steel, determined by the torsional method at 1000–1200°C, is increased 1.5–2 times. The ductility of the steel containing rare earth oxides at high temperatures is uniform along the height and width of the ingot. 3. The ultimate strength and the yield strength at room temperature are increased 11.5 and 15.4% respectively, the anisotropy of the mechanical properties decreases to a minimum, and the ductility of the steel increases in the direction perpendicular to the rolling direction. The addition of oxides of rare earth metals can be used in the case of castings of large sizes and castings with complex shapes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00650776
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