STEAM GENERATOR, AND CORRESPONDING METHODS OF MANUFACTURE AND USES

• Main Authors: GUILLODO MICHAEL, BRUSSIEUX CHARLES
• Format: Patent
• Language: Chinese; English
• Published: 23.10.2018
• Subjects: ALLOYS; BLASTING; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; HEATING; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; METHODS OF STEAM GENERATION; STEAM BOILERS; STEAM GENERATION; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS

The steam generator comprises at least one element (1) produced from a nickel alloy, the alloy having the following weight contents: - Ni greater than 50%; - Cr between 14% and 45%. According to the invention, the element (1) has a metal surface layer having, at a depth p from the inner surface, a weight content of chromium wCr(p), a weight content of carbon wc(p), and a weight content of available chromium wCr_dispo(p), where wCr_dispo(p)= wCr(p) - 16.61 wc(p). The weight content of available chromium wCr_dispo(p), taken as an average over the whole thickness of the metal surface layer from the inner surface, is greater than 0. 蒸汽发生器包括由镍基合金制成的至少个元件(1)，其中合金具有以下质量含量：-Ni多于50％；-Cr在14％与45％之间；根据本发明，元件(1)表面金属层，该表面金属层在内表面的深度p处具有铬的质量含量w(p)、碳的质量含量w(p)以及可用的铬含量w(p)，其中w(p)＝w(p)-16.61Wc(p)。在从内表面开始的表面金属层的整个厚度上取平均而取得的可用的铬含量w(p)大于0。