Cu and Ta containing high-strength and high-corrosion-resistance stainless steel and preparation method thereof
A stainless steel, high-strength technology, applied in the field of austenitic stainless steel, can solve the problems of component or equipment damage, affecting the safe operation of nuclear power plants, etc.
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Embodiment 1
[0051] Select electrical pure iron, metallic chromium sheet, metallic nickel plate, metallic molybdenum, 316 stainless steel scrap, pure copper plate, metallic tantalum as raw materials, and configure the stainless steel composition as follows: C=0.03, Ni=14.5, Cr=19.0, Mo=3.2, Ta=0.45, 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 smelting, the temperature of the molten pool is maintained at 1720 ℃ during smelting; the molten steel is calmed for 10 minutes before pouring, and the molten steel is poured at 1650 ℃ under argon protection. Cast into round ingots.
[0052] The ingot can be opened by hot forging. The hot forged blank is then cross-rolled and pierced to obtain a tube blank; the hot forging and cross-rolling piercing are heated to 1260°C, held for 5 hours, and then out of the furnace for forging. The initial forging temperature is 1170°C. The forging tem...
Embodiment 2
[0057] Select 317L stainless steel scrap, pure copper plate, and tantalum iron as raw materials. The stainless steel components configured are as follows: C=0.04, Ni=13.0, Cr=18.0, Mo=3.7, Ta=0.56, Cu=0.3, Mn=1.2, Si=0.7 , P≤0.035, S≤0.030, Fe=surplus.
[0058] After weighing the corresponding raw materials according to the composition requirements, they are smelted by vacuum induction. The temperature of the molten pool is maintained at 1680 ℃ during smelting; the molten steel is calmed for 5 minutes before pouring, and the molten steel is poured at 1550 ℃ under vacuum. Cast into square ingots.
[0059] The cast slab is heated to 1270°C, after holding for 3 hours, after being released from the furnace, the initial rolling temperature is 1160°C, the final rolling temperature = 980°C, and the total rolling area reduction rate is 62%; The bar is obtained, and the total rolling deformation is calculated as 82% according to the reduction of area. The bar is kept at 1055°C for 120 min...
Embodiment 3
[0062] Select electrical pure iron, metal chromium sheet, metal nickel plate, metal molybdenum, pure copper plate, tantalum, graphite block as raw materials, and the configuration of the stainless steel composition is as follows: C = 0.05, Ni = 12.0, Cr = 20.0, Mo = 3.2, Ta =0.70, 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 smelted under argon protection. The temperature of the molten pool is maintained at 1700°C during melting; the molten steel is calmed for 7 minutes before pouring, and the molten steel is poured at 1600°C under argon protection. Cast into round ingots.
[0064] The ingot can be rolled by a universal rolling mill with two pairs of parallel rolls. The cast slab is heated to 1280°C, kept for 4 hours and then out of the furnace for rolling. The initial rolling temperature is 1180°C and the final rolling temperature is 1020°C. The total rolling area s...
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