A kind of high aluminum weathering steel and preparation method thereof
A technology of weathering steel and high aluminum, applied in the field of alloys, can solve the problems of strict service requirements, weather resistance and mechanical properties that cannot meet the requirements, severe and complex corrosion of weathering steel in atmospheric environment, etc.
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[0048] The present invention also provides a preparation method for the high-aluminum weathering steel described in the above technical solution, comprising the following steps:
[0049] The raw materials of high-aluminum weathering steel are smelted and then cooled to obtain ingots;
[0050] The ingot is preheated and heat-preserved and hot-rolled sequentially to obtain the high-aluminum weathering steel.
[0051] In the present invention, unless otherwise specified, each component in the preparation method is a commercially available product well known to those skilled in the art.
[0052] In the invention, the raw material of the high-aluminum weathering steel is smelted and then cooled to obtain an ingot.
[0053] The present invention has no special limitation on the specific source and addition amount of the raw materials of the high-aluminum weathering steel, and the high-alumina weathering steel meeting the chemical composition requirements shall prevail. Specificall...
Embodiment 1
[0067] The chemical composition of high aluminum weathering steel is:
[0068] Fe-2Mn-5Al-0.3Si-0.05P-0.15Cu-0.15Ni-0.2Cr, that is, Mn2%, Al 5%, Si 0.3%, P 0.05%, Cu 0.15%, Ni 0.15% by mass percentage %, Cr 0.2%, the balance is Fe;
[0069] According to the chemical composition of the designed high-aluminum weathering steel, 92g industrial pure iron, 2g electrolytic manganese flakes, 5g pure aluminum, 0.3g silicon particles, 0.2g ferrophosphorus, 0.15g pure copper, 0.15g pure nickel and 0.2g chromium particles were immersed In absolute ethanol, air-dry after ultrasonic cleaning;
[0070] The obtained clean raw materials are mixed and placed in a water-cooled copper crucible in a vacuum electric arc furnace, and the vacuum degree is 5×10 - 3 Pa, the vacuum arc melting is carried out under the condition of argon gas with a pressure of 0.06MPa, the melting temperature is 2400°C, and the working current during the melting process is 500A. After each melting is completed, the al...
Embodiment 2
[0073] The chemical composition of high aluminum weathering steel is:
[0074] Fe-8Mn-6.5Al-0.1C-0.3Si-0.05P-0.3Cu-0.5Ni-0.2Cr-0.05Ti, that is, Mn 8%, Al 6.5%, C 0.1%, Si 0.3 %, P 0.05%, Cu 0.3%, Ni 0.5%, Cr 0.2%, Ti0.05%, the balance is Fe;
[0075] According to the chemical composition of the designed high-alumina weathering steel, 83.85g of industrial pure iron, 8g of electrolytic manganese flakes, 6.5g of pure aluminum, 0.1g of carbon particles, 0.3g of silicon particles, 0.2g of phosphorus iron, 0.3g of pure copper, and 0.5g of pure nickel , 0.2g of chromium particles and 0.05g of pure titanium are soaked in absolute ethanol, and air-dried after ultrasonic cleaning;
[0076] The obtained clean raw materials are mixed and placed in a water-cooled copper crucible in a vacuum electric arc furnace, and the vacuum degree is 5×10 - 3 Pa, the vacuum arc melting is carried out under the condition of argon gas with a pressure of 0.06MPa, the melting temperature is 2400°C, and t...
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