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
Active Publication Date: 2019-01-08
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
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The invention relates to a large heat input energy welding high-strength EH36 steel plate which is made of the following components in percentage by weight through smelting: 0.06-0.18% of C, 0.15-0.50% of Si, 1.10-1.60% of Mn, less than or equal to 0.012% of P, less than or equal to 0.003% of S, 0.10-0.40% of Ni, 0.010-0.030% of Nb, less than or equal to 0.010% of Al, 0.010-0.030% of Ti, 0.001-0.010% of Ca and the balance of Fe and inevitable impurities. The maximum thickness of the steel plate is 100mm, the yield strength of the steel plate is greater than or equal to 355MPa, the tension strength of the steel plate is greater than or equal to 510MPa, and the low-temperature impact absorption energy KV2 of the steel plate at minus 40 DEG C is greater than or equal to 150KJ. A production method of the steel plate comprises the following steps: carrying out smelting, LF/RH (Ladle Furnace/Ruhrstahl Heraeus) refining, continuous casting, heating, rolling, and rapid cooling, thereby obtaining a finished product of the steel plate. The steel plate produced by using the method provided by the invention has the characteristics of high purity, high strength, good low-temperature impact resistance, good toughness when the maximum input line energy is 300KJ/CM, and the like, can be widely applied to fields such as shipbuilding, bridges and building structures, and has wide application prospects.
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Property | Measurement | Unit |
Yield strength | 410.0 | MPa |
Tensile strength | 550.0 | MPa |
Yield strength | 405.0 | MPa |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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