Pressure container steel with high toughness at -140 DEG C and production method thereof
A pressure vessel, high toughness technology, applied in low temperature pressure vessel steel and its production, pressure vessel steel and its production field, can solve the problem of only adapting to temperature but not suitable for pressure vessels, etc.
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[0052] The present invention is described in detail below:
[0053] Table 1 is the value list of each embodiment of the present invention and comparative examples;
[0054] Table 2 is the main process parameter list of each embodiment of the present invention and comparative example;
[0055] Table 3 is the heat treatment process list of the embodiment of the present invention and contrast steel grade;
[0056] Table 4 is the mechanical inspection result of the embodiment of the present invention and comparative steel type;
[0057] Table 5 shows the test results of the hydrogen sulfide corrosion resistance of the examples of the present invention and the comparative steel grades.
[0058] Each embodiment of the present invention is produced according to the following steps:
[0059] Its steps:
[0060] 1) Smelting and continuous casting into billets: Carry out Ca treatment in the LF furnace, control the Ca in the molten steel within the target; control the RH vacuum treat...
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