METHOD OF TREATING ROLLED STEEL ARTICLE

    公开(公告)号:EP2576868B1

    公开(公告)日:2018-07-11

    申请号:EP11785958.7

    申请日:2011-05-20

    摘要: A method of treating a rolled steel article, the method comprising: providing a first solution comprising an acid arranged to separate mill scale components from steel and a surfactant arranged to suspend separated mill scale components in the first solution; applying the first solution to a surface of the article for a prescribed duration; rinsing the first solution from the surface of the article by applying a rinse liquid to the article; directing a first flow of air onto the surface of the article to remove moisture from the surface of rolled steel article; and directing a second flow of air onto the surface of the article subsequent to application of the second solution until remaining moisture on the article is substantially removed.

    AUSTENITE-BASE STAINLESS STEEL PIPE, FOR BOILER, HAVING EXCELLENT HIGH-TEMPERATURE STEAM OXIDATION RESISTANCE
    10.
    发明公开
    AUSTENITE-BASE STAINLESS STEEL PIPE, FOR BOILER, HAVING EXCELLENT HIGH-TEMPERATURE STEAM OXIDATION RESISTANCE 审中-公开
    管不锈钢与奥氏体锅炉基于杰出高温水蒸气氧化性能

    公开(公告)号:EP2060641A1

    公开(公告)日:2009-05-20

    申请号:EP06782906.9

    申请日:2006-08-23

    申请人: Nkktubes

    摘要: The present invention relates to an austenitic stainless steel tube for boiler, used for superheater or reheater in thermal power plant, giving excellent resistance to high temperature steam oxidation, in particular to an austenitic stainless steel tube containing 16 to 20% Cr by weight, and being cold-worked at the inner surface of the tube. The Cr concentration in the vicinity of the inner surface of the steel tube is 14% by weight or larger, and the hardness at 100 µm depth from the inner surface of the steel tube is 1.5 times or larger the average hardness of the mother material or is HV 300 or larger.

    摘要翻译: 本发明涉及到对奥氏体系不锈钢钢管用于锅炉,用于火力发电的过热器或再热器植物,给人以高温水蒸气氧化性优异,特别是在奥氏体系不锈钢钢管含有按重量计16至20%的Cr,和 在管的内表面是冷加工。 在钢管的内表面附近的Cr浓度为14%(重量)或更大,并且在从所述钢管的内表面100微米深度的硬度为1.5倍或更大的母材的平均硬度或 HV为300或更大。