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High-heat-input submerged-arc welding wire steel wire rod, preparation method thereof, high-heat-input submerged-arc welding wire and high-heat-input welding method

A technology of high heat input welding and high heat input, applied in arc welding equipment, welding equipment, welding medium, etc., can solve the problems of complicated welding process and low welding efficiency, and achieve low wire breakage rate during drawing and not easy to break wires , the effect of reducing the yield ratio

Active Publication Date: 2022-04-22
ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO LTD +1
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  • Application Information

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Problems solved by technology

[0003] In order to save the construction cost of large components and improve construction efficiency, high heat input welding technology is widely used in the field of bridge steel. Welding efficiency is low

Method used

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  • High-heat-input submerged-arc welding wire steel wire rod, preparation method thereof, high-heat-input submerged-arc welding wire and high-heat-input welding method
  • High-heat-input submerged-arc welding wire steel wire rod, preparation method thereof, high-heat-input submerged-arc welding wire and high-heat-input welding method
  • High-heat-input submerged-arc welding wire steel wire rod, preparation method thereof, high-heat-input submerged-arc welding wire and high-heat-input welding method

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Embodiment Construction

[0035] In one embodiment of the present invention, there is provided a large heat input submerged arc welding wire steel coil, the chemical composition of which comprises: C 0.04 ~ 0.06%, Si 0.1 ~ 0.2%, Mn 1.4 ~ 1.6%, Ni 1.0 ~ 1.5%, Nb0.02 ~ 0.04%, Ti 0.02 ~ 0.05%, B 0.0040 ~ 0.0055%, Al < 0.004%, Mg 0.0005 ~ 0.0020%, P≤0.012%, S≤0.005%, N≤0.005%, the rest is Fe and unavoidable impurities.

[0036] And preferably, the chemical composition of the large heat input submerged arc welding wire steel wire in terms of mass percentage further comprises: Cr 0.05 ~ 0.30%, V 0.01 ~ 0.15%, Zr 0.005 ~ 0.020%, Cu 0.05 ~ 0.30% of one of the four and more.

[0037] Preferably, the density of the magnesium inclusions in the steel wire of the large heat input submerged arc welding wire > 200 / mm 2 The tensile strength of the wire rod ≤ 600MPa, and the cross-sectional shrinkage rate ≥ 80%.

[0038] Further, the present embodiment further provides a method for preparing a large heat input submerged...

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Abstract

The invention discloses a high-heat-input submerged-arc welding wire steel wire rod and a preparation method thereof, a high-heat-input submerged-arc welding wire and a high-heat-input welding method. The high-heat-input submerged-arc welding wire steel wire rod comprises the following chemical components in percentage by mass: 0.04 to 0.06 percent of C, 0.1 to 0.2 percent of Si, 1.4 to 1.6 percent of Mn, 1.0 to 1.5 percent of Ni, 0.02 to 0.04 percent of Nb, 0.02 to 0.05 percent of Ti, 0.0040 to 0.0055 percent of B and the balance of Al, the alloy comprises the following components in percentage by weight: 0.004% of Mg, 0.0005-0.0020% of P, less than or equal to 0.005% of S, less than or equal to 0.005% of N and the balance of Fe and inevitable impurities. Through reasonable design of the chemical components and the content, the high-heat-input submerged-arc welding wire steel wire rod has low carbon equivalent in the welding wire preparation process, the low-temperature toughness of weld metal can be improved, generation of brittle phases is reduced, the yield ratio of the weld metal is reduced, and the prepared high-heat-input submerged-arc welding wire has good application prospects. The allowable welding heat input is greater than or equal to 300kJ / cm, and a steel plate with the thickness of more than 40mm can be thoroughly welded in a single pass.

Description

Technical field [0001] The present invention belongs to the technical field of welding materials, specifically relates to a large heat input submerged arc welding wire steel wire and preparation method thereof, large heat input submerged arc welding wire, large heat input welding method. Background [0002] With the rapid development of China's highways and high-speed railways, the rapid development of the steel bridge manufacturing industry has been promoted. While meeting the functionality, steel bridges develop in the direction of multi-function, multi-lane, heavy load, and large span. Structural steel for bridges is mainly used in key projects such as railway, highway, cross-sea, cross-river bridge construction, etc., because of the particularity of its use environment, it has strict requirements for comprehensive performance. [0003] In order to save the construction cost of large components and improve the construction efficiency, large heat input welding technology is wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40B23K9/18
CPCB23K35/3053B23K35/3073B23K35/40B23K9/18Y02P10/20
Inventor 麻晗王纳张宇
Owner ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO LTD
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