Copper-hafnium-cobalt corrosion-resistant austenitic stainless steel and processing and heat treatment method thereof
A technology of austenitic stainless steel and heat treatment method, applied in the field of austenitic stainless steel, can solve the problems of increased contact resistance, inability to meet the requirements of bipolar plate materials, etc.
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Embodiment 1
[0051] Select electrical pure iron, metal chromium sheet, metal nickel plate, 304 stainless steel waste, pure copper block, pure cobalt sheet, and metal hafnium as raw materials. The stainless steel composition is as follows: C=0.03, Ni=9.5, Cr=17.0, Hf= 0.42, Cu=0.2, Co=0.1, Mn=1.2, Si=0.8, P≤0.035, S≤0.030, Fe=balance.
[0052] 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 1500°C.
[0053] The plate is hot-rolled by a flat-roll mill. The hot-rolling plan is to heat the cast slab to 1270°C, heat it for 5 hours and then roll it out of the furnace. The hot-rolling start temperature is 1160°C and the final rolling temperature is 1000°C. The total amount of hot rolling of the plate is 65%.
[0054] The plate is deformed b...
Embodiment 2
[0059] 304 stainless steel waste, pure copper block, pure cobalt sheet, and hafnium iron are selected as raw materials. The stainless steel composition is as follows: C=0.04, Ni=10.0, Cr=17.8, Hf=0.58, Cu=0.3, Co=0.5, Mn= 1.2, Si=0.7, P≤0.035, S≤0.030, Fe=balance.
[0060] After the corresponding raw materials are weighed according to the composition requirements, the argon shielded arc melting is carried out, and the temperature of the molten pool is maintained 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 1600°C.
[0061] The plate is hot-rolled by a flat-roll mill. The hot-rolling plan is to heat the cast billet to 1290°C, hold it for 5 hours, and then roll it out of the furnace. The hot-rolling start temperature is 1190°C, and the final rolling temperature is 950°C. The total amount of plate hot rolling is 60%.
[0062] The plate is deformed by cold rolling, and the total reducti...
Embodiment 3
[0066]Select electrical pure iron, metal chromium sheet, metal nickel plate, pure copper block, pure cobalt sheet, hafnium iron, and graphite block as raw materials. The stainless steel composition is as follows: C=0.05, Ni=8.6, Cr=18.0, Hf=0.70 , Cu=0.4, Co=0.2, Mn=0.8, Si=0.5, P≤0.035, S≤0.030, Fe=balance.
[0067] After weighing the corresponding raw materials according to the composition requirements, they are induction smelted under the protection of argon gas.
[0068] The plate is hot-rolled with a flat roll mill. The hot-rolling plan is to heat the cast billet to 1280°C, keep it warm for 4 hours, and then roll it out of the furnace. The hot-rolling start temperature is 1180°C, and the final rolling temperature is 980°C. The total amount of hot rolling of the plate is 70%.
[0069] The plate is deformed by cold rolling, and the total reduction of cold rolling is 82%.
[0070] The plate is annealed at 1100°C, the holding time is 60 minutes, and nitrogen protection is u...
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