Welding method of Q460GJC steel used for architectural structure

A technology of steel for building structures and welding methods, applied in welding equipment, welding/welding/cutting items, arc welding equipment, etc., can solve the problems of increased welding difficulty, high Ni content, and unformed welding methods and processes, etc. Achieve the effect of meeting welding quality requirements, full objectivity and rationality

Inactive Publication Date: 2017-01-04
鞍钢钢结构(营口)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Ni content is high, and Ni is easy to form low-melting eutectic with many elements, so it is easy to produce cracks, and the welding difficulty increases. So far, there is no welding method and process for forming

Method used

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  • Welding method of Q460GJC steel used for architectural structure
  • Welding method of Q460GJC steel used for architectural structure
  • Welding method of Q460GJC steel used for architectural structure

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0036] Butt horizontal welding with plate thickness 20mm+20mm, using CO 2 +Ar gas shielded welding, the size of both plates is 20*300*610mm, choose a single-sided V-shaped groove of 45°, blunt edge of 2mm, root gap of 2mm; 9 layers of 18 welding, specific joint and groove form schematic diagram, The schematic diagram of welding bead layout is as follows: figure 1 and figure 2 shown.

no. 2 example

[0038] Corner butt flat welding of plate thickness 20mm+20mm, using submerged arc automatic welding, the size of both plates is 20*200*400mm, choose V-shaped groove 46°, blunt edge 2mm, root gap 10mm, back lining steel liner ; 7 layers and 11 welds, the specific schematic diagram of the joint and groove form, and the schematic diagram of the weld bead layout are as follows: image 3 and Figure 4 shown.

no. 3 example

[0040] Corner butt flat welding of plate thickness 20mm+20mm, using CO 2 +Ar gas shielded welding, the size of both plates is 20*200*400, choose V-shaped groove 46°, blunt edge 2mm, root gap 10mm, back lining steel liner; 7 layers 14 welding, specific joints and slopes The schematic diagram of the opening form and the layout of the welding bead are as follows: image 3 and Figure 5 shown.

[0041] Welding materials involved include:

[0042] Submerged arc welding automatic welding wire: MCJ60 GJ, Solder SJ101.

[0043] CO 2 +Ar gas shielded welding uses solid wire: WH60-GJ,

[0044] Welding equipment involved:

[0045] Submerged arc automatic welding welding equipment model ZD5-1600,

[0046] CO 2 +Ar gas shielded welding equipment model YD-500KR, the polarity is DC reversed.

[0047] The soldering condition is that the flux is baked at 300-350°C for 2 hours before use.

[0048] The ambient temperature of welding is -7~-8℃, and the ambient humidity is 62%. Clea...

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Abstract

The invention relates to a welding method of Q460GJC steel used for an architectural structure. The welding method comprises the steps that a plate blank which is 3-40 mm thick is welded at the room temperature of -10-0 DEG C through automatic submerged-arc welding or CO2+Ar gas shielded welding, specifically, (1) preheating is conducted before welding so that cold cracks can be prevented from being produced at the joint portion; (2) a reasonable groove mode and a welding method are put forward according to the joint mode and the thickness of the plate blank; (3) an appropriate welding material is selected and used according to the joint mode, the groove mode and the welding method; and (4) corresponding appropriate welding process parameters are presented. Making of the technical scheme of the welding method is based on a welding procedure qualification test, and the welding method has sufficient objectivity and reasonability; and the Q460GJC steel is welded through the technical scheme, a welded joint has mechanical properties equivalent to a parent material and meets the welding quality requirements of engineering.

Description

technical field [0001] The invention relates to the technical field of steel welding for building structures, in particular to a welding method for steel Q460GJC for building structures. Background technique [0002] The steel used in building structures has properties such as earthquake resistance and low temperature impact resistance, which improves its manufacturing reliability. The use of steel for building structure can make the building structure develop in the direction of high-rise and long-span. Such as high-rise buildings, long-span stadiums, airports and other large-scale construction projects. [0003] The main difference between Q460GJC and general carbon steel and low alloy steel is that the yield strength ratio and yield strength fluctuation range are specified, the carbon equivalent and welding crack sensitivity index are specified, and the P and S contents are reduced. However, the Ni content is high, and Ni is easy to form a low-melting eutectic with many...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/02B23K9/18B23K9/16B23K9/235B23K103/04
CPCB23K9/0216B23K9/16B23K9/18B23K9/235
Inventor 马丽袁旭东闫红霞谷飚胡金旭
Owner 鞍钢钢结构(营口)有限公司
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