Preparation method of seawater flushing corrosion resistant duplex-phase stainless steel
A duplex stainless steel, scouring and corrosion technology, applied in the field of materials, can solve the problems of high work hardening rate of duplex stainless steel, decreased corrosion resistance of the secondary phase, insufficient hardness and wear resistance, etc., to achieve excellent wear resistance effect, reduce Deformation resistance, effect of large deformation degree
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Embodiment 1
[0023] A preparation method of seawater erosion-resistant duplex stainless steel, the steps of which are as follows: commercially available as-cast duplex stainless steel is heated to 1040°C in a high-temperature resistance furnace, heat-preserved for 3 hours, and then water-cooled to room temperature to obtain solid-solution duplex stainless steel. phase stainless steel; the solid solution state duplex stainless steel is processed into a square ingot with a size of 10mm×10mm×40mm, and the surface of the square ingot is coated with a graphite-oil mixed lubricant, and then loaded into an equal-channel corner extrusion die; the extrusion die automatically With a temperature control system, the extrusion temperature is set at 400°C. At this temperature, the duplex stainless steel is subjected to 12-pass deformation processing using the C path of equal-channel angular extrusion; then water-cooled to room temperature to obtain seawater erosion-resistant corrosion Duplex stainless st...
Embodiment 2
[0027] A preparation method of seawater erosion-resistant duplex stainless steel, the steps of which are as follows: commercially available cast duplex stainless steel is heated to 1150°C in a high-temperature resistance furnace, heat-preserved for 1 hour, and then water-cooled to room temperature to obtain solid-solution duplex stainless steel. Phase stainless steel; solid solution duplex stainless steel is processed into a square ingot with a size of 100mm×100mm×300mm, and the surface of the square ingot is coated with a graphite-oil mixed lubricant, and then loaded into a corresponding large-sized equal-channel corner extrusion die; The extrusion die is equipped with a temperature control system, and the extrusion temperature is set at 650°C. At this temperature, the duplex stainless steel is deformed for 24 passes using the path A of equal-channel angular extrusion; and then water-cooled to room temperature to obtain Duplex stainless steel resistant to seawater erosion.
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Embodiment 3
[0030] A preparation method of seawater erosion-resistant duplex stainless steel, the steps of which are: commercially available as-cast duplex stainless steel is heated up to 1080°C in a high-temperature resistance furnace, heat-preserved for 2.5 hours, and then water-cooled to room temperature to obtain solid-solution duplex stainless steel. Phase stainless steel; solid solution duplex stainless steel is processed into a square ingot with a size of 20mm×20mm×40mm, the surface of the square ingot is coated with a graphite-oil mixed lubricant, and then loaded into an equal-channel corner extrusion die; the extrusion die automatically With a temperature control system, the extrusion temperature is set at 500°C. At this temperature, the dual-phase stainless steel is deformed for 16 times by using the path A of equal-channel angular extrusion; and then water-cooled to room temperature to obtain a double-phase stainless steel that is resistant to seawater erosion. Phase stainless s...
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