Pressure container steel having high toughness at -120 DEG C, and its production method
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 problems of high production cost and so on
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[0051] The present invention is described in detail below:
[0052] Table 1 is the value list of each embodiment of the present invention and comparative examples;
[0053] Table 2 is the main process parameter list of each embodiment of the present invention and comparative example;
[0054] Table 3 is the heat treatment list of the embodiment of the present invention and comparative steel grade;
[0055] Table 4 is the mechanical inspection result of the embodiment of the present invention and comparative steel type;
[0056] Table 5 shows the test results of the hydrogen sulfide corrosion resistance of the examples of the present invention and the comparative steel grades.
[0057] Each embodiment of the present invention is produced according to the following steps:
[0058] Its steps:
[0059] 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 treatment ...
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