| 摘要 |
Laser welding of a fine stainless steel or coated steel sheet metal of thickness 0.3-1.5 mm, especially constituent elements of domestic electrical appliances, using a laser beam having power up to 12 kW comprises using a gas mixture consisting of 40-60 volume % argon and the remainder (up to 100%) helium. Preferred Features: The metallic sheets comprise ferritic or austenitic stainless steel, or zinc-galvanized or zinc-electroplated steel. The welding rate is at least 5 m/minute, preferably 6-8 m/minute. Welding is carried with complete or near-complete penetration. Laser power is 2-12 kW, preferably 3-8 kW. The thickness of the sheets to be welded can have a thickness less than 1 mm. Independent claims are given for: (a) a procedure for the fabrication of an element for a domestic electrical appliance, where the element is fabricated by the above-described process, and is preferably a drum for a washing or drying machine, a tub for a dishwasher, or a body for a microwave oven, a refrigerator, or a freezer; and (b) a procedure for the fabrication of domestic steel elements, where the elements are fabricated by the above procedure and are preferably flat dishes, cookware, sinks, and flatware. |
