Development Status of Ni-Fe Base Superalloy for 700 °C Class A-USC Steam Turbine Rotor Application

被引：0

作者：

Imano, Shinya ^{[1
]}

Sato, Jun ^{[1
]}

Kamoshida, Hironori ^{[1
]}

Saito, Eiji ^{[2
]}

Kajikawa, Koji ^{[3
]}

Ohsaki, Satoru ^{[3
]}

Takahashi, Tatsuya ^{[3
]}

机构：

[1] Hitachi Ltd, Hitachi Res Lab, 1-1-7 Omika Cho, Hitachi, Ibaraki 3191292, Japan

[2] Hitachi Ltd, Hitachi Power Syst, Chiyoda Ku, Tokyo 1018010, Japan

[3] Japan Steel Works LTD, Muroran Res Lab, Muroran, Hokkaido 0518505, Japan

来源：

ADVANCES IN MATERIALS TECHNOLOGY FOR FOSSIL POWER PLANTS: PROCEEDINGS FROM THE SIXTH INTERNATIONAL CONFERENCE, 2010 | 2011年

关键词：

D O I：

暂无

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

To improve the microstructure stability at temperatures over 700 degrees C and avoid segregation of Nb, we modified the chemical composition of Alloy 706. The modified alloy (FENIX-700) contains lower Nb and higher Al than Alloy 706, is designed as a gamma' (Ni3Al) strengthened alloy without gamma" (Ni3Nb), delta and eta phases using the CALPHAD method. With this modification, the creep temperature capability has improved from 650 degrees C to 700 degrees C or more. The segregation property was also improved. Trial manufacturing of a 760mm phi) forging shaft using a triple melt process and trial melting of a 1050mm ESR ingot were performed using FENIX-700. In this presentation, the results of these trials will be shown and the alloy design of Ni-base welding materials for the welding type rotor (FENIX-700/12%Cr Ferritic Steel) for a 700 degrees C class steam turbine using the CALPHAD method will be also shown.

引用

页码：423 / 435

页数：13

共 33 条

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