Technology for centrifugal casting of high-nitrogen austenitic stainless steel pipe at normal pressure
A technology of high-nitrogen austenite and nitrogen austenite, which is applied in the direction of manufacturing tools, heat treatment equipment, furnaces, etc., can solve problems such as nitrogen overflow, nitrogen content not meeting the requirements of high nitrogen content, holes, etc., to achieve control of production costs, The effect of reducing the requirements of process conditions and high corrosion resistance
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[0032] Cast tube blank size is Φ 560 / 420×2000mm high-nitrogen stainless steel pipe, alloy composition: 0.7-0.85%N, <0.03%C, 18-20%Cr, 16-18%Mn, 2-2.5%Mo,<0.03%P,<0.03 %S, <0.5%Si, balance Fe. Add 70mm at each end and cut off after heat treatment.
[0033] ① Ingredients: According to the above alloy composition and the yield of alloy elements in metallurgy, as well as the weight of cast pipe, weigh pure iron, ferrochromium nitride, pure manganese, ferromolybdenum, and ingredients.
[0034] ② Mold and casting machine preparation: Use a horizontal centrifugal casting machine, roll and hang 2-3mm paint on the inner surface of the mold, and select a mold temperature of 200°C during pouring (the mold temperature range is 120-250°C).
[0035] ③Alloy melting and pouring:
[0036] It follows the process regulations for smelting high-nitrogen austenitic stainless steel at atmospheric pressure (the patent publication number of the previous application: CN101285148A; name: a method for...
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