Super304H steel welding wire capable of resisting high-temperature creep and aging embrittlement

US11446773B2 · kind B2 · utility

Assignees

• Wuhan University · CN
• POWER CHINA HENAN ENGINEERING CO., LTD. · CN

Inventors

• Xue hui Wang · Jiaocheng District, CN
• You Li · Sunnyvale, US
• Yucheng Chen · Xiamen, CN
• Dongxu Chen · Huizhou, CN
• Jianhua Sun · Tuji, CN
• Liquan Li · Baofeng County, CN
• Meihua Guo · Zhengzhou, CN

Key dates

• Filing date: Dec 8, 2019
• Grant date: Sep 20, 2022
• Expiry date: Dec 17, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23K2103/05
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A Super304H steel welding wire capable of resisting high-temperature creep and aging embrittlement, includes the following chemical components in percentage by mass: 0.04-0.1% of C, 0.4-1.5% of Mn, 7.5-12.5% of Ni, ≤0.5% of Si, 17.0-19.0% of Cr, ≤0.4% of Mo, 2.5-3.5% of Cu, 0.3-0.6% of Nb, 0.05-0.12% of N, ≤0.01% of S, ≤0.02% of P and the balance of Fe and other inevitable impurity elements. The welding wire can be used for welding of Super304H steel used in ultra super critical thermal power stations, has a weld being in a double-phase structure of austenite and a small amount of ferrite (volume fraction is 3-12%), and has good hot cracking resistance capability.