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Welding seam alloy and welding method of weather-resistant steel

A welding method and weathering steel technology are applied in the welding field of weathering steel welding suture and weathering steel, which can solve the problems of corrosion resistance and mechanical strength performance mismatch, and obstacles to the application and promotion of weathering steel.

Inactive Publication Date: 2016-05-04
ZHEJIANG SHENGDA STEEL TOWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The use of weathering steel is inseparable from the welding of weathering steel, but the performance of the welding part of weathering steel in terms of corrosion resistance and mechanical strength often does not match, which brings great benefits to the application and promotion of weathering steel in the domestic iron tower industry obstacles

Method used

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  • Welding seam alloy and welding method of weather-resistant steel
  • Welding seam alloy and welding method of weather-resistant steel
  • Welding seam alloy and welding method of weather-resistant steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A welding method of weathering steel, selecting 6mm ASTM A871GR65 weathering steel and JM-55Ⅱ welding wire as raw materials, including the formation of welding seam gold:

[0054] Groove polishing: control the gap at the root of the groove to 0.6mm, and polish both sides of the adjacent area of ​​the groove to expose the metal luster of the groove;

[0055] Spot welding assembly: tack welding is performed on the polished groove, the length of each tack welding point is controlled to 6mm, the distance between each two tack welding points is 200mm, the welding wire used for tack welding is JM-55Ⅱ welding wire , Tack welding is carried out under shielding gas protection;

[0056] Preheating before welding: After spot welding and assembly, preheat the groove and set the preheating temperature to 73℃;

[0057] Formation of the bottom welding layer: welding the preheated groove under the condition of shielding gas to form the bottom welding layer composed of the first weld pass;

[00...

Embodiment 2

[0062] This embodiment is basically the same as embodiment 1, but the differences are:

[0063] The thickness of the raw material ASTMA871GR65 weathering steel is 9mm.

Embodiment 3

[0065] This embodiment is basically the same as Embodiment 2, but the differences are:

[0066] The thickness of the raw material ASTMA871GR65 weathering steel is 15mm. In the preparation of the groove, the gap between the root of the groove is controlled to 1.8mm, and six steps are added between the temperature measurement between the bottom weld layer and the formation of the cover layer. :

[0067] Formation of the second weld bead of the filling layer: Under the condition of shielding gas, weld the groove that has passed the temperature detection between the passes to form the second weld bead;

[0068] Interpass grinding of the filling layer: grinding the second weld bead in the filling layer to remove the slag and pores generated after the formation of the second weld bead;

[0069] Interpass temperature measurement of the filling layer: measure the interpass temperature of the second weld bead of the filling layer. When the interpass temperature falls within the range of 140℃-1...

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Abstract

The invention belongs to the technical field of welding and relates to a welding seam alloy and a welding method of weather-resistant steel. In order to obtain a weather-resistant steel welding product meeting the requirement for application under a severe condition, the invention provides the welding seam alloy of the weather-resistant steel, and the welding seam alloy of the weather-resistant steel contains various corrosion-resistant alloy elements, so that the requirement for application under the severe condition can be met.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to a weather-resistant steel weld alloy and a welding method for weather-resistant steel. The weather-resistant steel referred to in the invention refers to ASTMA871GR65 weather-resistant steel, and the welding wire model JM-55Ⅱ is a domestically available commercial model. %Cu, 0.28%Ni, 0.41%Cr, 0.40%Si and 0.005%P, the impact tests of the weld alloys all examine the impact energy of the weld alloy at -40°C. Background technique [0002] At present, the steel materials commonly used in my country's transmission tower industry are Q235B and Q345B steel. Although this type of steel has certain mechanical properties, its corrosion resistance is not ideal. Therefore, it must be hot dipped before being used as steel for outdoor iron towers. Zinc anti-corrosion process to improve its corrosion resistance. This is not only large investment, high cost, harmful to health, polluting the envir...

Claims

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Application Information

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IPC IPC(8): B23K31/02B23K35/30B23K103/04
CPCB23K31/02B23K35/3053
Inventor 舒芳包镇回戴刚平张国勋李朋施洪亮吕闪闪冯雷
Owner ZHEJIANG SHENGDA STEEL TOWER
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