Low alloy high-strength steel plate capable of being welded in large energy input and method of producing the same
A low-alloy, high-strength, high-energy-intensity welding technology is applied in metal rolling, manufacturing tools, metal rolling, etc. It can solve the problems of lower toughness of the base metal, inability to meet the requirements of large-input energy, and difficult production control. Improved strength and toughness, suitable for mass production operations, and simple production process
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[0043] The present invention will be described below by comparing various examples and comparative examples. These examples are for explanatory purposes only, and the present invention is not limited to these examples.
[0044] Table 1 is the chemical composition of each steel type in the examples and comparative examples. Each steel is smelted in a converter. Table 2 is the smelting conditions of various steel grades in Examples and Comparative Examples. Table 3 is the rolling process of each steel type in the examples and comparative examples. Table 4 shows the conventional mechanical properties of various steel types in Examples and Comparative Examples. Table 5 shows the welding properties of various steel types in the examples and comparative examples.
[0045] It can be seen from Tables 1 to 5 that at the same strength level, the steel plate produced by the present invention has a lower carbon equivalent, and the toughness of the heat-affected zone is much higher tha...
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