Welding structure of 460MPa-grade anti-seismic fireproof and weather-resistant building structure

A technology of fire resistance and weather resistance, building structure, applied in welding medium, welding equipment, welding equipment and other directions, can solve the problems of difficult fire resistance, weather resistance, earthquake resistance, etc.

Inactive Publication Date: 2017-10-24
SHOUGANG CORPORATION
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a welding method for a 460MPa-level earthquake-resistant, fire-resistant and weather-resistant building structure, which solves the problem that the weld metal after welding of 460MPa-level high-rise steel is difficult to have both fire resistance (600 °C yield strength is not lower than 2 / 3 of room temperature), weather resistance (corrosion) Speed ​​≤0.013mm / year), earthquake resistance (-40℃ impact energy ≥69J)

Method used

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  • Welding structure of 460MPa-grade anti-seismic fireproof and weather-resistant building structure

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Embodiment 1

[0015] 1. The mass percentage of chemical composition of submerged arc welding wire should meet: C 0.08%, Mn 1.3%, Si 0.80%, S0.005%, P 0.008%, Cr 0.01%, Ni 0.9%, Mo 0.5%, Cu 0.25%, Ti 0.0125%, Nb 0.002%, As 0.001%, Sn 0.001%, Sb 0.001%, Al 0.024%, O 0.0015%, N≤0.0045%, B≤0.0003%, and the rest is iron.

[0016] 2. Choose 460MPa fire-resistant and weather-resistant steel with a thickness of 30mm, and make an asymmetrical X-shaped groove on the test plate. The groove is as follows: figure 1 As shown, the size of the steel plate is 600mm×200mm×30mm, leaving 2mm blunt edge and leaving no gap between the two plates.

[0017] 3. The chemical composition of 460MPa fire-resistant and weather-resistant steel is selected to meet: C0.05%, Mn1.0%, Si≤0.26%, S0.005%, P 0.007%, Cr 0.50%, Ni 0.12%, Mo 0.25%, Cu 0.32 %, Ti 0.013%, Nb 0.05%, As 0.0002%, Sn 0.0002%, Sb 0.0002%, Al 0.03%, O 0.002%, N 0.0043%, B0.0005%, and the rest is iron.

[0018] 4. The mechanical properties of 460MPa fire-...

Embodiment 2

[0023] 1. The mass percentage of chemical composition of submerged arc welding wire meets: C0.08%, Mn 1.3%, Si 0.80%, 0.005%, P 0.008%, Cr 0.01%, Ni 0.9%, Mo 0.5%, Cu 0.25%, Ti 0.0125 %, Nb 0.002%, As 0.001%, Sn 0.001%, Sb 0.001%, Al 0.024%, O 0.0015%, N≤0.0045%, B≤0.0003%, and the rest is iron.

[0024] 2. Choose 460MPa fire-resistant and weather-resistant steel with a thickness of 12mm, and open the I-shaped groove on the test plate. The groove is as figure 2 As shown, the size of the steel plate is 600mm×200mm×12mm, and there is no gap between the two plates.

[0025] 3. The chemical composition of 460MPa fire-resistant and weather-resistant steel is selected to meet: C 0.05%, Mn1.1%, Si≤0.28%, S0.005%, P 0.008%, Cr 0.30%, Ni 0.50%, Mo 0.30%, Cu 0.25% , Ti 0.015%, Nb 0.03%, As 0.0002%, Sn 0.0002%, Sb 0.0002%, Al 0.027%, O 0.0018%, N 0.0054%, B0.0004%, and the rest is iron.

[0026] 4. The mechanical properties of 460MPa fire-resistant and weather-resistant steel are sele...

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Abstract

The invention relates to a welding structure of a 460MPa-grade anti-seismic fireproof and weather-resistant building structure and belongs to the technical field of welding. The welding method comprises the following steps of: selecting a welding wire for submerged-arc welding and 460MPa fireproof weather-resistant steel meeting demands on component and mechanical properties; and pre-heating a steel plate to 20-150 DEG C before welding, controlling the interlayer-temperature at 20-200 DEG C, polishing a groove smoothly with a grinding machine before welding, performing priming, filling and capping by adopting the welding wire for submerged-arc welding with SJ101 flux, and finally, performing a mechanical property test on the welded steel plate. The welding method provided by the invention has the advantages that the welding method is easy to operate, is not sensitive to parameters of a welding process and can achieve demands on lightweight, no coating, anti-seismic and fire-resistant services of a high rise steel structure.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a welding method for a 460MPa-level earthquake-resistant, fire-resistant and weather-resistant building structure. Background technique [0002] With the increasing demand for high-rise and long-span buildings, the demand for high-strength building steel with a yield of ≥460MPa continues to increase. Considering the safety of high-rise buildings in service and reducing maintenance costs in the later period, high-strength building structural steel needs to be fire-resistant (600°C) Yield strength is not lower than room temperature 2 / 3), weather resistance (corrosion rate ≤ 0.013mm / year), earthquake resistance (impact energy at 40 °C ≥ 69J), and the proportion of welding processing of building steel structures is relatively high, as the weld of cast structure Compared with the base material, it is more difficult to meet fire resistance, weather resistance, and high tou...

Claims

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Application Information

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IPC IPC(8): B23K9/18B23K9/235B23K35/30C22C38/04C22C38/02C22C38/08C22C38/12C22C38/16C22C38/14C22C38/60C22C38/32C22C38/58C22C38/42C22C38/44C22C38/50C22C38/48B23K103/04
CPCB23K9/18B23K9/235B23K35/0261B23K35/3073B23K2103/04C22C38/008C22C38/02C22C38/04C22C38/08C22C38/12C22C38/14C22C38/16C22C38/32C22C38/42C22C38/44C22C38/48C22C38/50C22C38/58C22C38/60
Inventor 张熹郭占山赵英建陈延清刘宏张楠杨建炜王凤会刘琨李文远李春智
Owner SHOUGANG CORPORATION
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