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Forming the ultralow carbon stainless steel steel air below the ultralow carbon stainless steel steel flange
Forming the ultralow carbon stainless steel steel air below the ultralow carbon stainless steel steel flange
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机译:在超低碳不锈钢法兰下方形成超低碳不锈钢空气
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摘要
PROBLEM TO BE SOLVED: To provide a flange and a joint made of extra-low carbon stainless steel and a sealing valve element made of extra-low carbon stainless steel dispensing with a seal member by an extra-low carbon stainless steel material having both of adhesion and peelability.;SOLUTION: The flange is obtained by forming a hollow made of the extra-low carbon stainless steel having carbon concentration of 0.01% or less. The flange includes a seal structure on a main surface thereof, the seal structure has a protruded shape, the protruded shape includes a flat surface almost parallel to the main surface of the flange and a curvature surface extended from an end of the flat surface to the main surface of the flange. When a seal width is W1, a flat surface width is W2, a curvature radius is R, and a flat surface height is H, the following relationships are satisfied; dimension W1W2≥0, RW1, and RH. Further, smoothness Ry of the flat surface is about 0.1 μm, and the concentration of nitrogen injected to the flat surface is at least 1.65×1017/cm2.;COPYRIGHT: (C)2010,JPO&INPIT
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