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High-strength CO2 gas welding wire

A gas-shielded welding wire, high-strength technology, applied in the field of high-strength CO2 gas-shielded welding wire, can solve the problems of large welding spatter, high cost, low tensile strength of weld metal, low impact toughness, etc., and achieve stable yield, low cost, and high technology stable effect

Inactive Publication Date: 2009-05-27
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention provides a high-strength CO 2 Gas shielded welding wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The 50kg intermediate frequency induction furnace is used for smelting, and its inherent electromagnetic stirring effect is generally beneficial to improving the quality of steel. Select low S and P scrap steel for welding wire steel smelting, Cu is added during charging, Cr is added during refining, and active trace elements are added later or in steel ladles. The smelting uses Si iron and Mn iron for deoxidation, and strictly controls the content of trace elements and gases. There are no other special requirements for the smelting process, and it is poured into ingots.

[0031] The steel ingot is rolled into a billet, and the billet is put into the furnace and heated to 1200°C for half an hour, then rolled into a Φ6.5mm wire rod. After peeling, pickling, heat treatment once when drawing to Φ3.2mm, and finally drawing into a wire with a specification of Φ1.2mm, the surface is electroless copper-plated and then molded into welding wire.

[0032] The chemical compositio...

Embodiment 2

[0036] The difference between this example and Example 1 is that the weight percentage of the chemical composition of the welding wire is: C: 0.09, Si: 0.60, Mn: 1.60, Cr: 0.50, Cu: 0.30, Ti: 0.08, B: 0.002, Als : 0.002, the balance is Fe. The mechanical properties of the deposited metal are shown in the following table.

Embodiment 3

[0038]The difference between this example and Example 1 is that the weight percentage of the chemical composition of the welding wire is: C: 0.13, Si: 0.80, Mn: 1.90, Cr: 0.70, Cu: 0.50, Ti: 0.12, B: 0.010, Als : 0.03, the balance is Fe. The mechanical properties of the deposited metal are shown in the following table.

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PUM

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Abstract

A high-strength CO2 gas protection welding wire belongs to a welding wire which carries out the alloying to the alloy element. Aiming at the shortages of prior gas protection welding wire of high cost, low tensile strength and low impact tenacity of the welding seam metal, the invention provides the gas protection welding wire with the chemical composition weight percentage of C:0.08-0.15, Si:0.50-1.0, Mn:1.30-2.00, P is less than or equal to 0.025, S is less than or equal to 0.020, Cr:0.40-0.80, Cu:0.10-0.60, Ti:0.05-0.15, B:0.002-0.010, Als:0.002-0.03, and the allowance is the Fe. The invention has the advantages of reducing the cost of the welding wire, improving the tensile strength and the impact tenacity of the welding seam metal, reducing the splashing when welding and being beneficial for the generalization and application.

Description

technical field [0001] The invention relates to a high-strength CO 2 Gas shielded welding wire is specifically a kind of welding wire alloyed with alloying elements such as Cr and Cu. Background technique [0002] Gas shielded welding has the characteristics of high production efficiency, adaptability to all-position welding, and easy realization of automatic welding production. It has been widely used in shipbuilding, construction machinery, petrochemical, automobile manufacturing, oil pipeline and other industries. At present, the proportion of gas shielded welding in developed countries has reached more than 30%, and the proportion of gas shielded welding in my country is also gradually increasing, and the amount of gas shielded welding wire is very large. [0003] The shielding gas of gas shielded welding wire is generally divided into CO 2 and argon-enriched, argon-enriched in turn with 20% CO 2 +80% Ar mainly. Generally speaking, CO 2 The gas cost is low and relat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30
Inventor 黄治军缪凯刘吉斌王玉涛周运武胡家国陈浮牟文广
Owner 武钢集团有限公司