Copper and niobium reinforced corrosion-resistant austenitic stainless steel and preparation method thereof
A technology of austenitic stainless steel and stainless steel, applied in the field of austenitic stainless steel, can solve problems affecting the safe operation of nuclear power plants, damage to components or equipment, etc., and achieve the effects of excellent corrosion resistance, reduced corrosion rate, high hardness and strength
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Embodiment 1
[0051] Select electrical pure iron, metal chromium sheet, metal nickel plate, metal molybdenum, 316 stainless steel scrap, pure copper plate, and metal niobium as raw materials. The stainless steel composition is as follows: C=0.03, Ni=12.0, Cr=16.0, Mo=2.4, Nb=0.23, Cu=0.2, Mn=1.2, Si=0.8, P≤0.035, S≤0.030, Fe=balance. After weighing the corresponding raw materials according to the composition requirements, argon shielded arc melting, the temperature of the molten pool is kept at 1720°C during melting; the molten steel is calmed for 10 minutes before pouring, and the molten steel is poured under argon shielding at 1650°C. Cast into round ingots.
[0052] The ingot can be opened by hot forging, and the billet after hot forging is then cross-rolled and pierced to obtain a pipe billet; hot forging and cross-rolled piercing are heated to 1260 ° C, kept for 5 hours and then released for forging, the initial forging temperature is 1170 ° C, and the final forging temperature is 1170...
Embodiment 2
[0057] 316L stainless steel waste, pure copper plate, and ferroniobium are selected as raw materials, and the stainless steel components configured are as follows: C=0.25, Ni=13.0, Cr=16.8, Mo=2.6, Nb=0.30, Cu=0.3, Mn=1.2, Si=0.7 , P≤0.035, S≤0.030, Fe=balance.
[0058] After weighing the corresponding raw materials according to the composition requirements, vacuum induction melting is carried out, and the temperature of the molten pool is maintained at 1680°C during melting; the molten steel is calmed for 5 minutes before pouring, and the molten steel is vacuum poured at 1550°C. Cast into square ingots.
[0059] The billet is heated to 1270°C, and after 3 hours of heat preservation, the billet is opened by pass rolling. The initial rolling temperature is 1160°C, the final rolling temperature is 980°C, and the total area reduction rate of rolling is 62%. Bars were obtained, and the total rolling deformation was calculated as 82% according to the reduction of area. The bar is...
Embodiment 3
[0062] Select electrical pure iron, metal chromium sheet, metal nickel plate, metal molybdenum, pure copper plate, ferroniobium, and graphite block as raw materials, and the composition of the configured stainless steel is as follows: C=0.26, Ni=14.0, Cr=17.0, Mo=2.5, Nb =0.36, Cu=0.4, Mn=0.8, Si=0.5, P≤0.035, S≤0.030, Fe=balance.
[0063] After weighing the corresponding raw materials according to the composition requirements, they are induction smelted under the protection of argon, and the temperature of the molten pool is kept at 1700°C during smelting. Cast into round ingots.
[0064] The cast ingot can be rolled by a universal rolling mill with two pairs of parallel rolls. The cast billet is heated to 1280°C, held for 4 hours and rolled out of the furnace. The rate is calculated as 65%;
[0065] The T-shaped profile is prepared by universal rolling, and the total rolling deformation is calculated as 85% according to the reduction of area;
[0066] After cold rolling, ...
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