High-plasticity and low-yield-ratio straight seam welding steel round pipe with yield strength larger than or equal to 355MPa and manufacturing method of high-plasticity and low-yield-ratio straight seam welding steel round pipe
The invention belongs to the technical field of steel round pipe preparation, and particularly relates to a high-plasticity low-yield-ratio straight seam welding steel round pipe with the yield strength larger than or equal to 355 MPa and a manufacturing method of the high-plasticity low-yield-ratio...
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| creator | QI WEIWEI HOU GUANGDA WU XUPENG LI YUGONG LIU XUDONG MA HENG ZHANG LIANGLIANG HUANG ZHIDONG SUN QIAN |
| description | The invention belongs to the technical field of steel round pipe preparation, and particularly relates to a high-plasticity low-yield-ratio straight seam welding steel round pipe with the yield strength larger than or equal to 355 MPa and a manufacturing method of the high-plasticity low-yield-ratio straight seam welding steel round pipe. The high-plasticity low-yield-ratio straight seam welding steel round pipe comprises, by weight, 0.16%-0.20% of C, 0.12%-0.25% of Si, 0.95%-1.15% of Mn, smaller than or equal to 0.020% of P, smaller than or equal to 0.010% of S and the balance Fe and inevitable impurities. The manufacturing method comprises a steel smelting process, a refining process, a slab continuous casting process, a rolling process and a pipe manufacturing process. The yield strength of the round pipe is low, more plastic deformation can be borne after the round pipe is yielded and before the round pipe is fractured, the stress space of steel is increased, the time from deformation to fracture is prolo |
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The high-plasticity low-yield-ratio straight seam welding steel round pipe comprises, by weight, 0.16%-0.20% of C, 0.12%-0.25% of Si, 0.95%-1.15% of Mn, smaller than or equal to 0.020% of P, smaller than or equal to 0.010% of S and the balance Fe and inevitable impurities. The manufacturing method comprises a steel smelting process, a refining process, a slab continuous casting process, a rolling process and a pipe manufacturing process. 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| language | chi ; eng |
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| subjects | ALLOYS CHEMISTRY COMBINED OPERATIONS FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MACHINE TOOLS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS OTHER WORKING OF METAL PERFORMING OPERATIONS TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS UNIVERSAL MACHINE TOOLS |
| title | High-plasticity and low-yield-ratio straight seam welding steel round pipe with yield strength larger than or equal to 355MPa and manufacturing method of high-plasticity and low-yield-ratio straight seam welding steel round pipe |
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