Twisted-type submerged-arc flux-cored wire with high efficiency and crack resistance and preparation method thereof

A flux-cored wire and crack resistance technology, applied in welding equipment, welding media, manufacturing tools, etc., can solve the problems of high energy consumption in the repair process, hot cracks in the surfacing layer, and high production costs, and achieve abnormal weld structure and Small component segregation, low welding energy consumption, and easy transportation

Inactive Publication Date: 2019-04-16
江苏联捷焊业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current large-scale roll surfacing repair process consumes a lot of energy, has a long cycle and high production costs
In addition, the roll surface of large-scale roll repair requires high hardness and wear resistance, so the welding wire for submerged arc surfacing generally contains alloy elements such as W

Method used

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  • Twisted-type submerged-arc flux-cored wire with high efficiency and crack resistance and preparation method thereof
  • Twisted-type submerged-arc flux-cored wire with high efficiency and crack resistance and preparation method thereof
  • Twisted-type submerged-arc flux-cored wire with high efficiency and crack resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A stranded submerged arc flux-cored welding wire with high efficiency and crack resistance. The raw materials of the flux core powder are divided into: 28 parts of low-carbon ferrochromium, 45 parts of pig iron, 9 parts of electrolytic manganese, and ferromolybdenum. 6.5 parts, 3.5 parts of ferro-tungsten, 1.5 parts of ferro-vanadium, 1 part of carbon powder, 1 part of metal silicon powder, and 0.5 parts of ferroniobium. Fill low-carbon ferrochromium, pig iron, ferrotungsten, ferro-vanadium, and carbon powder into the medium-frequency induction furnace. After melting, add metal silicon powder, ferromolybdenum, ferro-niobium, and electrolytic manganese in turn, and then add 1% of the mass ratio of 3 : 1 silicon-calcium alloy silicon-aluminum-barium-calcium deoxidizer for deoxidation and slag removal, fully fused, mixed evenly for 4 minutes, then sprayed and atomized at 1620°C, passed through a 150-mesh sieve after drying, and obtained drug core powder. According to the b...

Embodiment 2

[0029] A stranded submerged arc flux-cored welding wire with both high efficiency and crack resistance. The raw materials of the flux core powder are divided into: 30 parts of low-carbon ferrochrome, 42 parts of pig iron, 8.5 parts of electrolytic manganese, and ferromolybdenum. 6 parts, 4 parts of ferro-tungsten, 2 parts of ferro-vanadium, 1.6 parts of carbon powder, 1.2 parts of metal silicon powder, and 0.8 parts of ferroniobium. Fill low-carbon ferrochrome, pig iron, ferrotungsten, ferro-vanadium, and carbon powder into the medium-frequency induction furnace. After melting, add metal silicon powder, ferro-molybdenum, ferro-niobium, and electrolytic manganese in sequence, and then add 1.3% of the mass ratio of 3 : 1 silicon-calcium alloy silicon-aluminum-barium-calcium deoxidizer for deoxidation and slag removal, fully fused, mixed evenly for 3 minutes, then sprayed and atomized at 1600°C, passed through a 100-mesh sieve after drying, and obtained drug core powder. Accordin...

Embodiment 3

[0032] A stranded submerged arc flux-cored welding wire with high efficiency and crack resistance. The raw materials of the flux core powder are divided into: 32 parts of low-carbon ferrochromium, 46 parts of pig iron, 9.5 parts of electrolytic manganese, and ferromolybdenum. 7 parts, 4.5 parts of ferro-tungsten, 2.5 parts of ferro-vanadium, 1.2 parts of carbon powder, 1 part of metal silicon powder, and 0.4 parts of ferroniobium. Fill low-carbon ferrochrome, pig iron, ferrotungsten, ferro-vanadium, and carbon powder into the medium-frequency induction furnace. After melting, add metal silicon powder, ferro-molybdenum, ferro-niobium, and electrolytic manganese in turn, and then add 0.6% of the mass ratio of 3 : 1 silicon-calcium alloy silicon-aluminum-barium-calcium deoxidizer for deoxidation and slag removal, fully fused, mixed evenly for 3 minutes, then sprayed and atomized at 1650°C, passed through an 80-mesh sieve after drying, and obtained the drug core powder. According ...

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Abstract

The invention discloses a twisted-type submerged-arc flux-cored wire with high efficiency and crack resistance and a preparation method thereof. The twisted-type submerged-arc flux-cored wire is formed by spirally twisting at least seven steel strips coated with flux-cored powder, wherein the flux-cored powder comprises the following components of, in percentage by mass, 0.08%-0.18% of carbon, 1.0%-2.0% of manganese, 0.3%-1.2% of silicon, less than or equal to 0.03% of phosphorus, less than or equal to 0.03% of sulfur, 5.0%-6.2% of chromium, 0.7%-1.5% of tungsten, 0.8%-1.6% of molybdenum, 0.1%-0.7% of vanadium, 0.02%-0.05% of niobium and the balance iron and inevitable impurity elements. The twisted-type submerged-arc flux-cored wire is formed by spirally twisting a plurality of thin flux-core monofilaments, can be made into thicker welding wires with good coiling performance and is convenient to transport, storage and welding, the current and the voltage required by welding is relatively small, a larger welding speed is achieved under the condition of the same welding standard, the hardness of the prepared surfacing layer is medium, the crack sensitivity is low, and the crack resistance is excellent.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a stranded submerged arc chemical which is suitable for surfacing welding of large rolls (cold and hot support rolls or pinch rolls) or welding of extra-thick steel plates and has both high efficiency and excellent crack resistance Cored wire and method of making same. Background technique [0002] In the past ten years, the submerged arc surfacing in the welding industry has been facing a major problem, that is, the wear and repair of large rolls. Large rolls in metallurgical industry steel mills are often worn when rolling large extra-thick steel plates (such as extra-thick steel plates for aircraft carriers), and it is often necessary to use surfacing welding to repair the roll surface. Welding wire + HJ107 flux is similar to the submerged arc surfacing process. [0003] The diameter of large rolls can reach more than 2000mm, and the thickness of the s...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/304B23K35/40
Inventor 梁裕刘平礼冯昱
Owner 江苏联捷焊业科技有限公司
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