STAINLESS STEEL JOINING METHOD
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United States of America Patent
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app pub date -
Oct 7, 2010
filing date -
Oct 26, 2009
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Abandoned
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Abstract
Disclosed is a stainless steel joining method which can make a welding bead narrow and deep and prevent fatigue strength from being lowered due to thermal stress, thereby preventing deformation of a product. A stainless steel joining method comprises: a first step of inserting and disposing a thin brazing filler metal between joining surfaces of two stainless steel pieces; a second step of radiating a laser beam onto the joining surfaces to perform a welding process by a contactless laser welder; a third step of filling the brazing filler metal molten in a brazing furnace between the joining surfaces to perform a brazing process; and a fourth step of cooling the brazing filler metal filled between the joining surfaces. According to the stainless steel joining method of the present invention, since a thin brazing filler metal is inserted between stainless steel base metals and a contactless laser welding operation is performed to joining portions, a welding bead can be formed narrow and deep, making it possible to prevent a fatigue strength from being lowered due to thermal stress and the product from being deformed.
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