A kind of anti-coking alloy material processing method
A technology of alloy material and treatment method, applied in the field of anti-coking alloy material treatment, can solve the problems of stainless steel alloy material content and relationship definition, and achieve the effect of continuous film thickness and high chemical stability
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Embodiment 1～3
[0023] Prepare stainless steel samples with different Si and Mn contents. The basic composition is: Cr: 30-38wt.%, Ni: 42-48%, C: 0.3-0.5wt%, Fe: the balance. The specific composition is shown in Table 1. A mixed gas containing methane, water vapor and hydrogen is introduced at 1100°C, and the oxygen partial pressure is 3.0×10 -17 atm, processing 30h, the result is as follows figure 1 as shown, figure 1 Indicates that it contains different Si and Mn contents, the basic components are: Cr: 30-38wt.%, Ni: 42–48%, C: 0.3-0.5wt%, Fe: balance, stainless steel at 1100 ℃ methane, hydrogen and water Steam (oxygen partial pressure is 3.0×10 -17 atm) initial 30-hour weight gain data in the mixed cracking atmosphere;
[0024] Each plus sign in the figure represents the experimental data of one sample.
Embodiment 4
[0036] Cut the comparison test piece and the alloy 14#, 15#, 16# test pieces into 5×5×2mm hanging piece samples, and the element composition of the test pieces is shown in Table 2.
[0037] Before the experiment, the weighed metal coupons were suspended in the furnace tube in turn, and the temperature was raised after the protection of He gas was introduced. The time from the initial room temperature to the cracking reaction temperature of 860°C was 90 minutes. After the temperature rises to the cracking temperature, the He gas is stopped, and at the same time, 2vol.%C 2 h 6 +98%vol.N 2 The mixed gas and 1.2vol.% water vapor are uniformly mixed and passed into the reaction furnace tube for cracking reaction, and the oxygen partial pressure is 7.0×10 -18 atm. The pyrolysis and coking reaction time is 20 hours. After the coking experiment is over, stop heating and feeding, protect with He gas, and cool down to room temperature naturally. Under the conditions of this experime...
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