High-performance corrosion-resistant economic composite steel coiled tubing and manufacturing method thereof
A composite steel material and manufacturing method technology, applied in the direction of rigid pipe, pipe, pipeline protection, etc., can solve the problem that the coiled tubing cannot fully meet the economic, efficient, safe and reliable operation requirements, and the performance cannot fully meet the field operation requirements of the coiled tubing. Unable to withstand pressure loads and other problems, to achieve the effect of solving insufficient corrosion resistance, good plasticity and toughness, and low cost
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[0044] The specific implementation example is as follows:
[0045] Please refer to Figure 1-3 As shown, a high-performance, corrosion-resistant, economical composite steel coiled tubing includes a base layer 1 and a composite layer 2. The base layer 1 and the composite layer 2 are metallurgically combined; wherein the base layer 1 is a carbon steel or low alloy steel layer, The composite layer 2 is a corrosion-resistant alloy layer. The composite layer 2 is arranged on the inner or outer surface of the base layer 1 to form a single-layer composite coiled tubing. The composite layer 2 is arranged on the inner surface and the outer surface of the base layer 1 to form an inner and outer composite layer coiled tubing.
[0046] The components and mass percentages in the base layer 1 are as follows:
[0047] C 0.06%-0.23%, Mn 0.5%-2.1%, P≤0.02%, S≤0.005%, Si 0.15%-0.5%, Cr 0.35%-1.6%, Mo 0.02%-0.3%, Ni 0.05%-0.97 %, Cu 0.1%-0.5%, Nb+Ti+V≤0.2%, Fe balance.
[0048] The composite layer 2...
Example Embodiment
[0069] Example 1:
[0070] A method for manufacturing a high-performance, corrosion-resistant, economical composite steel coiled tubing. The coiled tubing includes an outer composite pipe with an inner base layer and an outer composite layer. According to the chemical composition requirements of the coiled tubing base material, the coiled tubing is smelted in an electric furnace (EF). Ladle refining (LF) and vacuum degassing (VD) smelting, precisely control the chemical composition of molten steel, reduce harmful non-metallic elements and inclusions, and connect through mold electromagnetic stirring technology, mold non-sinusoidal vibration technology, and light reduction technology. After casting a slab, through controlled rolling and controlled cooling technology, low-carbon low-alloy steel coils with excellent microstructure and properties and grain size ASTM Grade 12 are obtained. According to mass percentage, its specific chemical composition is as follows: C 0.08%, Mn 0.75%...
Example Embodiment
[0073] Example 2:
[0074] A method for manufacturing high-performance, corrosion-resistant, economical composite steel coiled tubing. The coiled tubing includes a base layer and inner and outer composite pipes with inner and outer composite layers. According to the chemical composition requirements of the coiled tubing base material, the coiled tubing is smelted in an electric furnace (EF) and ladle Refining (LF) and vacuum degassing (VD) smelting, precise control of the chemical composition of molten steel, reduce harmful non-metal elements and inclusions, continuous casting through mold electromagnetic stirring technology, mold non-sinusoidal vibration technology, and light reduction technology Into the billet, through controlled rolling and controlled cooling technology, low-carbon and low-alloy steel coils with good structure and performance and grain size ASTM Grade13 are obtained. In terms of mass percentage, the specific chemical composition is as follows: C 0.12%, Mn 0.8...
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