Abstract: A process for producing a refined magnesium material which is flame retardant by adding an alkaline earth metal. In the process, the dross in a thin film is formed on the surface of the molten magnesium material by contacting it with a dross-formable atmosphere gas while the molten magnesium material is subjected to a vertical vortex flow. The dross encloses the impurity floating on the surface of molten magnesium material through the vortex flow in a vertical direction. The resultant dross is accumulated at the corner of the crucible to prevent the re-diffusion of the impurity. The continuous application of the vortex flow against the molten magnesium material causes the thin film of dross to be continuously formed on the molten magnesium material and adhered thereto so as to enclose the impurity each time it is formed. Accordingly, the molten magnesium material is improved in cleanliness or refined.

Abstract: A suspension arm for a vehicle is provided, the suspension arm including an L-shaped arm body having a first end portion, an intermediate portion, and a second end portion. The first end portion is adapted to pivotally connect the arm body to a vehicle. The intermediate portion has a bulge formed thereon which is adapted to pivotally connect the arm body to the vehicle. The second end portion is adapted to connect the arm body to a vehicle wheel knuckle. The arm body is formed from a single piece of pipe material having a closed cross-section.

Abstract: A process for producing a refined magnesium material which is flame resistant by adding an alkaline earth metal. In the process, the dross in a thin film is formed on the surface of the molten magnesium material by contacting it with a dross-formable atmosphere gas while the molten magnesium material is subjected to a vertical vortex flow. The dross encloses or wraps the impurity floating on the surface of molten magnesium material through the vortex flow in a vertical direction. The resultant dross is accumulated at the corner of the crucible to prevent the re-diffusion of the impurity. The continuous application of the vortex flow to the molten magnesium material causes the thin film of dross to be continuously formed on the molten magnesium material and adhered thereto so as to enclose or wraps the impurity each time it is formed. Accordingly, the molten magnesium material is improved in purity.