Research And Development Of Steels For Ship And Offshore Platform

In order to meet the urgent needs of strategic reserves of energy, research and development have independent intellectual property rights of high-strength, high toughness offshore platform planks for lifting Shougang quality steel, occupy the international market has a role in promoting quality steel. In this paper。 Through a narrow composition control technology, strict control of temperature and finish cooling process, so that controlled rolling Ceq value D36 stability control in 0.36~0.39%, the successful development of low carbon equivalent easily welded steel D36. By studying the effects of vanadium on the carbon steel plate E40。 Make full use of weak water-cooling technology to improve the strength and toughness of normalizing the status of delivery of E40, the development of large-scale container steel E40. By studying the final cooling temperature。 Cooling rate on low-carbon TMCP state EQ51, the establishment and composition matches the TMCP process to obtain acicular ferrite and granular bainite structure, we developed a low-cost high strength and toughness of EQ51。By studying the quenching temperature, tempering temperature, tempering time quenching process reversed affect quality E550, the establishment and composition matches the quenching system, and by low-carbon, adding Cr, Mo, B and other elements hardenability and clean steel and other key technology to produce quenched state of marine steel E550 has excellent low-temperature toughness。By rolling steel target thickness, the thickness of the rough rolling mill put steel, finish rolling, bending force reasonably precise control, forming a precise thickness control technology to achieve a marine steel user weight deviation does not exceed 1.5% requirements. Developed a series D36, E40, EQ51, E550 and other marine steel, fill the first Qin company’s marine engineering steel blank to achieve a comprehensive overall project orders ability, successfully applied CIMC, China Shipbuilding Industry Corporation, too Group, Jiangsu new Times and other marine platforms, expanding supply capacity and market competitiveness Shougang steel marine engineering。...