Preparation method for low oxygen content and high alloying nickel-based mother alloy and powder
A low oxygen content, master alloy technology, applied in the field of powder metallurgy, can solve the problems of ceramic inclusions and pollution, achieve the effects of reducing oxidation and impurities, ensuring yield, and avoiding oxidation
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[0016] Example 1:
[0017] Ni-50wt.%Cr master alloy, Ni-5wt.%B master alloy, Ni-Mo master alloy, Ni-Nb master alloy, as well as aluminum block, sponge titanium, and sponge zirconium with a purity greater than 99.9wt.% Pretreatment in .% hydrochloric acid aqueous solution to remove surface oxides. The pretreatment time is 30 minutes. After washing with alcohol, it is treated and dried in an oven at 60°C for 60 minutes; the pretreated raw materials are mixed according to the target composition, and the target composition is Ni-9.15wt.%Al-19.23wt.%Cr-6.62wt.%Mo-3.31wt.%Nb-1.15wt.%Ti-0.15wt.%Zr-0.02wt.%B-0.18wt.%C. The raw materials are smelted in a vacuum induction melting furnace. Ceramic crucibles are used during the smelting process. After the charge is melted, the power is increased to increase the temperature of the molten pool to 1670°C. Then, 2wt.% carbon blocks are added, and the temperature is kept for 30 minutes. In the process, an electromagnetic stirrer is used to stir ...
Example Embodiment
[0018] Example 2:
[0019] Ni-50wt.%Cr master alloy, Ni-5wt.%B master alloy, Ni-Mo master alloy, Ni-Nb master alloy, as well as aluminum block, sponge titanium, and sponge zirconium with a purity greater than 99.9wt.% Pretreatment in .% hydrochloric acid aqueous solution to remove surface oxides. The pretreatment time is 30 minutes. After washing with alcohol, it is treated and dried in an oven at 60°C for 60 minutes; the pretreated raw materials are mixed according to the target composition, and the target composition is Ni-9.15wt.%Al-19.23wt.%Cr-6.62wt.%Mo-3.31wt.%Nb-1.15wt.%Ti-0.15wt.%Zr-0.02wt.%B-0.18wt.%C. The raw materials are smelted in a vacuum induction melting furnace. During the smelting process, ceramic crucibles are used. After the charge is melted, the power is increased to increase the temperature of the molten pool to 1670°C. Then, 2wt.% carbon blocks are added and the temperature is maintained for 30 minutes. In the process, an electromagnetic stirrer is used to...
Example Embodiment
[0020] Example 3:
[0021] Ni-50wt.%Cr master alloy, Ni-5wt.%B master alloy, Ni-Mo master alloy, Ni-Nb master alloy, as well as aluminum block, sponge titanium, and sponge zirconium with a purity greater than 99.9wt.% Pretreatment in .% hydrochloric acid aqueous solution to remove surface oxides. The pretreatment time is 30 minutes. After washing with alcohol, it is treated and dried in an oven at 60°C for 60 minutes; the pretreated raw materials are mixed according to the target composition, and the target composition is Ni-9.15wt.%Al-19.23wt.%Cr-6.62wt.%Mo-3.31wt.%Nb-1.15wt.%Ti-0.15wt.%Zr-0.02wt.%B-0.18wt.%C. The raw materials are smelted in a vacuum induction melting furnace. Ceramic crucibles are used during the smelting process. After the charge is melted, the power is increased to increase the temperature of the molten pool to 1670°C. Then, 2wt.% carbon blocks are added, and the temperature is kept for 30 minutes. In the process, an electromagnetic stirrer is used to stir ...
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