Large heat input energy welding high-strength EH36 steel plate and making method thereof
A large input energy welding, EH36 technology, applied in the field of metallurgy, can solve the problems of small resistive input energy, low carbon equivalent, strong toughness, poor operability, etc., and achieve the goal of enhancing market competitiveness, uniform structure of steel plate, and excellent comprehensive performance Effect
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[0049] Example 1
[0050] The high-strength ship plate EH36 for large heat input welding of this embodiment, with a thickness of 50mm, is smelted with the following mass percentage components: C: 0.08%, Si: 0.35%, Mn: 1.54%, P: 0.008% , S: 0.003%, Al: 0.005%, Nb: 0.016%, Ni: 0.30%, Ti: 0.015%, Ca: 0.003%, the balance is Fe and inevitable impurities.
[0051] The steps of the method for producing high-strength ship plate EH36 for large heat input welding of this embodiment are as follows:
[0052] (1) Smelting: will contain the following mass percentage components C: 0.08%, Si: 0.35%, Mn: 1.54%, P: 0.008%, S: 0.003%, Al: 0.005%, Nb: 0.016%, Ni: 0.30 %, Ti: 0.015%, Ca: 0.003% molten steel is first smelted in an electric furnace and sent to the LF refining furnace for refining. When the oxygen content is 15PPM, Ti is used for deoxidation, and the molten steel temperature reaches 1570℃ and transferred to the RH furnace for vacuum degassing treatment; The temperature is 66.6Pa, the vacu...
Example Embodiment
[0064] Example 2
[0065] The high-strength high-strength ship plate EH36 for large heat input welding of this embodiment has a thickness of 70mm and is smelted with the following mass percentage components: C: 0.10%, Si: 0.30%, Mn: 1.55%, P: 0.007%, S: 0.003%, Al: 0.004%, Nb: 0.020%, Ni: 0.28%, Ti: 0.019%, Ca: 0.003%, the balance is Fe and inevitable impurities.
[0066] The steps of the production method of the high-strength high-strength ship plate EH36 steel plate for large heat input welding of this embodiment are as follows:
[0067] (1) Smelting: will contain the following mass percentage components C: 0.10%, Si: 0.30%, Mn: 1.55%, P: 0.007%, S: 0.003%, Al: 0.004%, Nb: 0.020%, Ni: 0.28 %, Ti: 0.019%, Ca: 0.003% molten steel is first smelted by an electric furnace, and then sent to the LF refining furnace for refining. When the oxygen content reaches 48PPM, Ti is used for deoxidation, and the molten steel temperature reaches 1560℃ and transferred to the RH furnace for vacuum de...
Example Embodiment
[0079] Example 3
[0080] The high-strength high-strength ship plate EH36 for large heat input welding of this embodiment, with a thickness of 100mm, is smelted with the following mass percentage components: C: 0.10%, Si: 0.30%, Mn: 1.50%, P: 0.004%, S: 0.003%, Al: 0.004%, Nb: 0.020%, Ni: 0.28%, Ti: 0.019%, Ca: 0.003%, the balance is Fe and inevitable impurities.
[0081] The steps of the production method of the high-strength high-strength ship plate EH36 steel plate for large heat input welding of this embodiment are as follows:
[0082] (1) Smelting: will contain the following mass percentage components C: 0.10%, Si: 0.30%, Mn: 1.50%, P: 0.004%, S: 0.003%, Al: 0.004%, Nb: 0.020%, Ni: 0.28 %, Ti: 0.019%, Ca: 0.003% molten steel is first smelted in an electric furnace and then sent to the LF refining furnace for refining. When the oxygen content is 95PPM, Ti is used for deoxidation, and the molten steel temperature reaches 1565°C and transferred to the RH furnace for vacuum degassi...
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