Multiphase reinforced nickel-cobalt-based high-chromium wear-resistant high-temperature alloy and preparation method
A high-temperature alloy, nickel-cobalt-based technology, used in metal rolling, metal rolling, metal processing equipment, etc., can solve the problems of difficult welding and processing of materials, difficult to meet performance requirements, unfavorable wear resistance, etc., and achieve excellent resistance. Effects of corrosion/oxidation properties, good microstructure stability and hot workability, excellent hardness and wear resistance
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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 for 0.5 hours, and then continue to heat up with the furnace to a range of 90°C below the γ' melting temperature 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 and figure 2It is the...
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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