A kind of multiphase strengthened nickel-cobalt-based high-chromium wear-resistant superalloy and its preparation method
A high-temperature alloy, nickel-cobalt-based technology, applied in metal rolling, metal rolling, metal processing equipment, etc., can solve the problems of material welding and processing difficulties, difficulty in meeting performance requirements, material embrittlement, etc., and achieve good organizational stability The effects of high resistance and hot forming ability, excellent corrosion resistance/oxidation performance, and excellent high temperature strength
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Embodiment 1
[0034] By increasing the Cr content, excellent high-temperature corrosion / oxidation resistance can be obtained, and at the same time, the precipitation of a large amount of а-Cr phase in the grain can be promoted to improve the strength of the alloy. The alloy is smelted in a vacuum induction furnace, and the obtained alloy includes: C: 0.07%, Cr: 23%, Co: 20-25%, Mn: 0.3%, Si: 0.3%, Mo: 3.0%, W: 3.0%, Ti: 5.8%, Al: 3.0%, Zr: 0.03%, B: 0.02%, and the balance is Ni.
[0035] Heat the alloy with the furnace at a rate of 10°C / min to 1020°C and keep it warm for 0.5 hours, then continue to heat it up with the furnace to 90°C below the γ' melting temperature and keep it warm for 4.0 hours, and air cool to room temperature after completion;
[0036] The alloy was heated with the furnace at a rate of 60 °C / min to 760 °C for 8 hours, then cooled to room temperature, then rapidly heated to 860 °C at the same rate for 2 hours, and finally cooled to room temperature.
[0037] figure 1 w...
Embodiment 2
[0039] By increasing the Cr content, excellent high-temperature corrosion / oxidation resistance can be obtained, and at the same time, the precipitation of a large amount of а-Cr phase in the grain can be promoted to improve the strength of the alloy. The alloy is smelted in a vacuum induction furnace, and the obtained alloy includes: C: 0.07%, Cr: 23%, Co: 20-25%, Mn: 0.3%, Si: 0.3%, Mo: 3.0%, W: 3.0%, Ti: 5.8%, Al: 3.0%, Zr: 0.03%, B: 0.02%, and the balance is Ni.
[0040] The alloy was homogenized at 1200°C for 24 hours, followed by high-temperature rolling at 70°C below the γ' melting temperature, with a deformation of 10% per pass, and returned to the furnace for 20 minutes after rolling. The final total deformation of the alloy was 50%. In order to avoid problems such as cracking of alloy ingots caused by transverse shear stress during alloy rolling, high-temperature hot rolling is carried out by sheathing, and the sheathing material is 304 stainless steel sheet with a t...
Embodiment 3
[0044] A multiphase strengthened nickel-cobalt-based high-chromium wear-resistant superalloy, including C: 0.01%, Cr: 27%, Co: 20%, Mn: 0.5%, Si: 0.1%, Mo: 1.0% by mass percentage , W: 2.5%, Ti: 5.5%, Al: 2.0%, Zr: 0.03%, B: 0.02%, and the balance is Ni.
[0045] The preparation method of the above-mentioned multiphase strengthened nickel-cobalt-based high-chromium wear-resistant superalloy comprises the following steps:
[0046] 1) Melting: alloy ingots are obtained by vacuum melting;
[0047] 2) Homogenize the alloy ingot obtained in step 1) at 1180°C for 72 hours, and then carry out high-temperature rolling at 30°C below the γ' melting temperature, with a deformation of 5% in each pass. After the preparation is completed, return to the furnace and keep warm for 10 minutes. The total deformation of the final alloy is not less than 50%. And the high-temperature rolling is carried out by sheathing, and the sheathing material is a 304 stainless steel sheet with a thickness o...
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