Title:
HIGH-STRENGTH HIGH-TEMPERATURE ALLOYS FOR THERMAL POWER UNITS AND PROCESSING TECHNIQUE THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/223760
Kind Code:
A1
Abstract:
A High-strength high-temperature alloy for thermal power units and a processing technique therefor. The high-temperature alloy comprises the following components by mass percentage: 0.05 to 0.08% of C, 14 to 17％ of Cr, ≤ 0.5% of Mn, ≤ 0.5% of Si, 1.0 to 2.5% of W, 0.3 to 2.0% of Mo, 2.0 to 2.5% of Ti, 1.0 to 1.5% of Al, ≤ 0.003% of B, ≤ 0.03% of Zr, 37 to 48% of Fe, and the balance of Ni. A pre-formulated alloy furnace charge is smelted in an electric arc furnace under a vacuum degree of no more than 0.5 Pa; the alloy is subjected to cogging-forging with a deformation amount of 70% in the temperature range of 200-250 ℃ above the precipitation temperature of Ni3Al(γ'); and high temperature rolling with a deformation amount of 80% is performed at 150-200 °C above the γ' precipitation temperature. The alloy has excellent high temperature mechanical properties above 650°C.
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Inventors:
YAN JINGBO (CN)
GU YUEFENG (CN)
YUAN YONG (CN)
YANG ZHENG (CN)
ZHANG XINGXING (CN)
GU YUEFENG (CN)
YUAN YONG (CN)
YANG ZHENG (CN)
ZHANG XINGXING (CN)
Application Number:
PCT/CN2021/092505
Publication Date:
November 11, 2021
Filing Date:
May 08, 2021
Export Citation:
Assignee:
HUANENG POWER INT INC (CN)
XIAN THERMAL POWER RES INST CO (CN)
XIAN THERMAL POWER RES INST CO (CN)
International Classes:
C22C30/00; B22D27/00; C21C7/10; C21D1/00; C21D8/00; C22C1/02; C22C33/04; C22F1/10
Foreign References:
| CN111394638A | 2020-07-10 | |||
| CN110952016A | 2020-04-03 | |||
| CN110863099A | 2020-03-06 | |||
| CN103556073A | 2014-02-05 |
Attorney, Agent or Firm:
XI'AN TONG DA PATENT AGENCY CO., LTD. (CN)
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