Effects of Alloying Elements on the Hardenability, Toughness and the Resistance of Stress Corrosion Cracking in 1 to 3 mass% Cr Low Alloy Steel

被引：12

作者：

Yamada, Masayuki ^{[1
]}

Yan, Liang ^{[1
]}

Takaku, Reki ^{[1
]}

Ohsaki, Satoru ^{[2
]}

Miki, Kazuhiro ^{[3
]}

Kajikawa, Koji ^{[3
]}

Azuma, Tsukasa ^{[3
]}

机构：

[1] Toshiba Co Ltd, Power & Ind Syst R&D Ctr, Tsurumi Ku, Yokohama, Kanagawa 2300045, Japan

[2] Japan Steel Works Ltd, Muroran Plant, Muroran, Hokkaido 0518505, Japan

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

来源：

ISIJ INTERNATIONAL | 2014年 / 54卷 / 01期

关键词：

geothermal turbine rotor forging; alloying element; strength; toughness; stress corrosion cracking; C-segregation; SULFIDE;

D O I：

10.2355/isijinternational.54.240

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effects of alloying elements on the hardenability, toughness and the resistance to stress corrosion cracking have been evaluated in the 1 to 3 mass%Cr low alloy steels for 1 600 mm phi class large-sized turbine rotor forgings for geothermal power generation. The chemical composition suitable for the rotor forging which satisfied the required material properties and which reduced the C-segregation in the center portion of the ingot was chosen under the restrictive condition on the upper limit of Ni and Cr contents suitable for turbine rotors in a geothermal corrosive environment. An 8 ton sand mold ingot of the selected chemical composition was manufactured and the reduction of the C-segregation was verified. It is concluded that the selected 2.25Cr-0.9Ni-0.6Mo-0.25V-0.15Si-1.0Mn-0.25C steel (mass%) is hopeful as the chemical composition for large-sized turbine rotor forgings for geothermal power generation.

引用

页码：240 / 247

页数：8

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Yamada, Masayuki
Yan, Liang
Takaku, Reki
Ohsaki, Satoru
Miki, Kazuhiro
Kajikawa, Koji
Azuma, Tsukasa
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