Wire rod for Cr-Mo steel submerged arc welding wire and manufacturing method thereof
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A technology of submerged arc welding wire and manufacturing method, which is applied to the wire rod and manufacturing field of Cr-Mo steel submerged arc welding wire, can solve the problems of dependence on imports and difficult metallurgical manufacturing, and achieves high purity, improved toughness, and reduced embrittlement. Effect
Pending Publication Date: 2020-12-18
JIANGYIN XINGCHENG GOLD MATERIALS CO LTD
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It is precisely because of this series of strict technical index restrictions that the metallurgical manufacture of this type of welding consumables is very difficult, and currently it mainly relies on imports
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Embodiment 1
[0045] C: 0.13%, Si: 0.18%, Mn: 1.2%, P: 0.003, S: 0.002%, Cr: 2.4%, Mo: 1.05%, V: 0.38%, Nb: 0.015%, Ni: 0.08%, Cu : 0.08%, Sb: 0.0012%, Sn: 0.0023%, As: 0.0062%, X=(10P+5Sb+4Sn+As)×10 2 =5.14, J=(Si+Mn)×(P+Sn)×10 4 =73.14, the balance is Fe and unavoidable impurity elements.
Embodiment 2
[0047] C: 0.12%, Si: 0.17%, Mn: 1.22%, P: 0.004, S: 0.002%, Cr: 2.4%, Mo: 1.05%, V: 0.38%, Nb: 0.015%, Ni: 0.08%, Cu : 0.08%, Sb: 0.0015%, Sn: 0.0020%, As: 0.0052%, X=(10P+5Sb+4Sn+As)×10 2 =6.07, J=(Si+Mn)×(P+Sn)×10 4 =83.4, the balance is Fe and unavoidable impurity elements.
[0048] The molten steel of the above two components is hoisted to the continuous casting respectively, and the continuous casting slab with the cross-sectional size of 200mm×200mm is produced, and the continuous casting ensures that the superheat of the tundish is 15-30°C. The mold adopts special low-carbon alloy steel mold slag, and adopts electromagnetic stirring of the mold and end electromagnetic stirring to ensure the uniformity of the billet structure. The billet is fully peeled before high-wire rolling, and the peeling depth is ≥1.0mm to ensure the surface quality of the billet.
[0049] Heat the continuous casting slab to above 1110°C, control the residual oxygen in the furnace below 4%, hea...
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Abstract
The invention relates to a wire rod for a Cr-Mo steel submerged arc welding wire and a manufacturing method thereof. The wire rod is prepared from the following chemical components in percentage by mass: 0.10-0.20% of C, 0.10-0.60% of Si, 1.0-1.5% of Mn, 2.0-3.0% of Cr, 0.95-1.15% of Mo, 0.3-0.5% of V, 0.01-0.05% of Nb, 0.01-0.20% of Ni, 0.01-0.20% of Cu, and the balance of Fe and inevitable impurity elements. The wire rod produced through steelmaking, refining, continuous casting, controlled rolling and cooling and annealing can be used for welding during manufacture of high-strength Cr and Mo steel, and good temper brittleness resistance and good high-temperature endurance performance of welded metal are guaranteed through the component design and high-purity requirements of the wire rod.
Description
technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a wire rod for Cr-Mo steel submerged arc welding wire and a manufacturing method thereof. Background technique [0002] Hot wall hydrogenation reactor is the key equipment of oil refining and coal liquefaction engineering. The reactor works at a certain high temperature and high pressure, and through hydrogenation catalysis and cracking, petroleum, residual oil, heavy oil, etc. are cracked, refined and purified. The complete set of manufacturing technology for hot wall hydrogenation reactors in my country has become increasingly mature, and the main materials and internal components have been localized. However, the narrow gap submerged arc welding and inner wall surfacing materials of the cylinder mainly rely on imports. [0003] Key technical requirements: The working temperature of this type of pressure vessel is 320-550°C, which is exactly the temper embrittl...
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