Preparation method of carbide strengthening heat-resistant steel matrix composite
A composite material and carbide technology, applied in the field of steel matrix composite materials, can solve problems such as unfavorable industrial production, inability to coat for long-term service work, small coating thickness, etc., and achieve the effect of excellent high temperature oxidation resistance.
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Embodiment 1
[0020] Cr 3 C 2 Carbide (particle size: 75-95um), after adding 0.1% methanol process control agent by powder weight, ball milled for 50 hours to make the particle size 3-10um, and put it in a tank filled with argon for storage. Determine the chemical composition of austenitic heat-resistant steel (C: 0.58%; Si: 1.8%; Mn: 1.8%; Mo: 0.5%; S≤0.03%; P≤0.03%; Ni: 35%; Fe: the rest), Calculate and weigh the raw materials (scrap steel, pure nickel, ferromolybdenum, ferromanganese, ferrosilicon), and melt them sequentially in an electric furnace to 1500°C, then carry out slag removal, deoxidize with aluminum wire, and keep warm for 3 minutes. Put the molten steel out of the furnace and then pour it into the electric furnace. After continuing to heat up to 1500 ° C, carry out slag removal again, use aluminum wire to deoxidize and keep it warm for 1 minute. At this time, Cr 3 C 2 The powder (accounting for about 5% of the weight of molten steel) is poured and spread on the bottom of ...
Embodiment 2
[0023] The self-prepared Cr 7 C 3 Carbide powder (particle size: 55-75um), after adding 0.1% methanol process control agent by powder weight, ball milled for 30 hours to make the particle size 2-9um, and put it into a tank filled with argon for storage. Determine the chemical composition of austenitic heat-resistant steel (C: 0.58%; Si: 1.8%; Mn: 1.8%; Mo: 0.5%; S≤0.03%; P≤0.03%; Ni: 35%; Fe: the rest), Calculate and weigh the raw materials (scrap steel, pure nickel, ferromolybdenum, ferromanganese, ferrosilicon), and melt them sequentially in an electric furnace to 1500°C, then carry out slag removal, deoxidize with aluminum wire, and keep warm for 3 minutes. Put the molten steel out of the furnace and then pour it into the electric furnace. After continuing to heat up to 1500 ° C, carry out slag removal again, use aluminum wire to deoxidize and keep it warm for 1 minute. At this time, Cr 7 C 3 The powder (accounting for about 5% of the weight of molten steel) is poured an...
Embodiment 3
[0026] The self-prepared Cr 23 C 6 Carbide powder (particle size: 40-75um), after adding 0.1% methanol process control agent by powder weight, ball milled for 20 hours to make the particle size 3-9um, and put it into a tank filled with argon for storage. Determine the chemical composition of austenitic heat-resistant steel (C: 0.58%; Si: 1.8%; Mn: 1.8%; Mo: 0.5%; S≤0.03; P≤0.03; Ni: 35%; Fe: the rest), calculate and Raw materials (scrap steel, pure nickel, ferromolybdenum, ferromanganese, ferrosilicon) are weighed, and when they are melted in an electric furnace to 1500°C, the slag is removed, deoxidized by aluminum wire, and then kept for 3 minutes. Put the molten steel out of the furnace and then pour it into the electric furnace. After continuing to heat up to 1500 ° C, carry out slag removal again, use aluminum wire to deoxidize and keep it warm for 1 minute. At this time, Cr 23 C 6 The powder (accounting for about 5% of the weight of molten steel) is poured and spread ...
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