Gaona Aero Material Co., Ltd.

Fushun Special Steel Shares Co., Ltd.

Guangpu Zhao

Ran Duan

Shuo Huang

Heyong Qin

Beijiang Zhang

Guohua Xu

Wenyun Zhang

Qiang Tian

Yingyu Chou

Lianpeng Li

Chao Qi

Shifu Chen

The invention provides a preparation method of a nickel-based wrought superalloy wheel disk forging used at high temperature, in which the alloy has high content of solution strengthening elements W, Mo and strengthening phase γ' phase forming elements Al, Ti, Nb and γ′ phase content reaches 55-65%. In view of a series of technical problems caused by high γ′ phase to alloy smelting and forging, the high-temperature stress relief annealing, low-temperature stress relief annealing process of steel ingot and high temperature homogenizing annealing of steel bar were proposed by optimizing the thermal process of wheel disk forging and controlling the precipitation and dissolution of γ′ phase.

Preparation method of nickel-based wrought superalloy wheel disk forgings used at high temperature

Disclosed in this application are a large-sized high-Nb superalloy ingot and a smelting process thereof. The smelting process includes: vacuum induction melting to prepare a plurality of vacuum induction melting ingots with the same composition which are used for preparing electroslag electrodes with the same number as the vacuum induction melting ingots for use in electroslag remelting, preparing a consumable electrode from the prepared consumable electroslag electrodes, and performing vacuum consumable arc remelting for a plurality of times by using the consumable electroslag electrodes as raw material. A large-sized high-Nb superalloy ingot having a weight of 15 tons or above and a diameter of 800 mm or above can be prepared from such process.

Large-sized high-Nb superalloy ingot and smelting process thereof

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Beijing, China

Guangpu Zhao