Low welding crack sensibility high-strength steel plate special-purpose welding wire

A technology of low welding crack and high strength steel plate, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problem of Pcm value, low carbon equivalent and high welding cannot be realized, steel plate does not show excellent performance, and improves The production cost of welding wire and other issues can be achieved to achieve the effect of grain refinement, improving strength and toughness, and preventing cold cracks

Inactive Publication Date: 2008-04-09
金秋生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-strength steel plate with low welding crack sensitivity welded by this substitute welding wire, because the content of alloy elements in the weld is too high, resulting in too high Pcm value and low carbon equivalent, it cannot be welded without preheating or low preheating. The steel plate does not ref...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The steel with S and P both less than 0.10% by weight is selected for the smelting of welding wire steel, and the smelting process has no special requirements. In the smelting process, the following elements C: 0.10, Si: 0.8, Mn: 1.80, Ti: 0.10, B: 0.001, Mo: 0.40, Cr: 1.0, and V: 0.09 are added in the following weight percentages, with the balance being iron and its indispensable Avoid impurities whose content is not more than 0.01% of the iron content.

Embodiment 2

[0018] The steel with S and P both less than 0.025% by weight is selected for smelting wire steel, and the smelting process has no special requirements. In the process of smelting, the following elements C: 0.06, Si: 1.0, Mn: 1.40, Ti: 0.02, B: 0.008, Mo: 0.60, Cr: 0.05, V: 0.05 are added in the following weight percentages, and the balance is iron and its indispensable Avoid impurities whose content is not more than 0.40% of the iron content. After drawing into the welding wire, the welding wire is plated with copper, and the amount of copper plating is 0.5% of the iron content in the welding wire.

Embodiment 3

[0020] The steel with S and P both less than 0.015 weight percent is selected for the smelting of wire steel, and the smelting process has no special requirements. In the process of smelting, the following elements C: 0.12, Si: 0.4, Mn: 2.10, Ti: 0.15, B: 0.010, Mo: 0.20, Cr: 0.50, V: 0.01 are added in the following weight percentages, and the balance is iron and its indispensable Avoid impurities whose content is not more than 0.10% of the iron content. After drawing into the welding wire, the welding wire is plated with copper, and the amount of copper plating is 0.3% of the iron content in the welding wire.

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PUM

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Abstract

The invention belongs to the welding wire technical field, which discloses a special welding wire for a steel plate with low welding crack sensibility and high strength. The technical proposal is that the welding wire contains elements in the following weight percentage: 0.06 to 0.12 percent of carbon, 0.40 to 1.00 percent of silicon, 1.40 to 2.10 percent of manganese, 0.02 to 0.20 percent of titanium, 0.001 to 0.01 percent of boron, 0.20 to 0.60 percent of molybdenum, 0.05 to 1.20 percent of chromium, niobium b lower than or equal to 0.10 percent , vanadium lower than or equal to 0.10 percent, sulfur lower than or equal to 0.10 percent, phosphorus lower than or equal to 0.10 percent, the rest comprises iron and other unavoidable foreign matters. Through the experiment, the ambient temperature of the welding joint for welding crack sensibility and high strength steel plate is subzero 20 DEG C by utilizing the welding wire without preheat, and the creation of cold cracks can be prevented.

Description

Technical field [0001] The invention belongs to the technical field of welding wires, and particularly relates to a special welding wire for high-strength steel plates with low welding crack sensitivity. Background technique [0002] Low welding crack sensitivity and high strength steel plate is a steel plate that cannot be welded without preheating or low preheating. The main characteristics of this type of steel plate are low Pcm value, low carbon equivalent, and excellent welding. It has the characteristics of low C content, high purity, high strength and high toughness. Because this kind of steel is a new type of steel, there is no special welding wire specifically used for welding of this steel, and there is no special welding wire used for welding at lower temperature. When welding this steel, ordinary high-strength welding wire is often used as a substitute. In order to improve the weld strength, high-strength welding wires (such as ER76-1, ER83-1) are simultaneously added...

Claims

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Application Information

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IPC IPC(8): B23K35/30
Inventor 金秋生
Owner 金秋生
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