Precipitation hardening stainless steel flux-cored wire for continuous roller submerged arc overlaying and preparation method thereof

A flux-cored wire, submerged arc surfacing technology, applied in welding equipment, welding media, manufacturing tools, etc., can solve the problems of fatigue cracks, harsh service conditions of continuous casting rolls, insufficient wear resistance of continuous casting rolls, etc. Excellent wear resistance and thermal fatigue resistance, good tempering softening resistance at high temperature, and excellent welding process performance

Active Publication Date: 2018-05-11
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of continuous casting technology and the upgrading of continuous casting steel, the temperature of continuous casting slabs rises, and the requirements for the temper softening resistance of continuous casting rolls are also put forward. High-temperature continuous casting slabs are transported on continuous casting rolls, equivalent to Perform high-temperature tempering on the roll surface. If the high-temperature tempering resistance of the roll surface is insufficient, its hardness will drop significantly. After continuous transportation of high-temperature steel plates, the roll surface will continue to be tempered a...

Method used

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  • Precipitation hardening stainless steel flux-cored wire for continuous roller submerged arc overlaying and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Select a carbon steel strip with a thickness of 0.5mm, a width of 14mm, and a weight of 1857g, and roll it into a U shape, 290g of metal chromium powder, 250g of low-carbon ferrochromium, 120g of metal nickel powder, 100g of metal copper powder, and 8g of electrolytic metal manganese , 10g ferro-niobium, 1g metal molybdenum powder, 3g ferro-titanium, 20g rare earth ferrosilicon, 3g metal aluminum powder, 80g barium fluoride, 115g iron powder, a total of 1000g powder, mixed and stirred for 50 minutes and then added to the U-shaped tank, the filling rate After the joint is closed, it undergoes four drawing and reducing diameters of φ3.96mm, φ3.68mm, φ3.42mm, and φ3.17mm in turn, and the final diameter of the finished welding wire is 3.2mm.

Embodiment 2

[0039]Select a carbon steel strip with a thickness of 0.5mm, a width of 14mm, and a weight of 1631g, and roll it into a U shape, 310g of metal chromium powder, 265g of low-carbon ferrochrome, 130g of metal nickel powder, 115g of metal copper powder, and 12g of electrolytic metal manganese , 15g ferro-niobium, 8g metal molybdenum powder, 6g ferro-titanium, 25g rare earth ferrosilicon, 6g metal aluminum powder, 100g barium fluoride, 8g iron powder, 1000g powder in total, mix and stir for 70 minutes and add to the U-shaped tank evenly, The filling rate is 38%. After the joint is closed, it undergoes four drawing and reducing diameters of φ3.96mm, φ3.68mm, φ3.42mm, and φ3.17mm in sequence, and the final diameter of the finished welding wire is 3.2mm.

Embodiment 3

[0041] Select a carbon steel strip with a thickness of 0.5mm, a width of 14mm, and a weight of 1631g, and roll it into a U shape, 300g of metal chromium powder, 260g of low-carbon ferrochromium, 130g of metal nickel powder, 110g of metal copper powder, and 12g of electrolytic metal manganese , 15g ferro-niobium, 7g metal molybdenum powder, 5g ferro-titanium, 24g rare earth ferrosilicon, 5g metal aluminum powder, 95g barium fluoride, 37g iron powder, a total of 1000g powder, mixed and stirred for 55 minutes and then added to the U-shaped tank, the filling rate After the joint is closed, it undergoes four drawing and reducing diameters of φ3.96mm, φ3.68mm, φ3.42mm, and φ3.17mm in turn, and the final diameter of the finished welding wire is 3.2mm.

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Abstract

The invention discloses a precipitation hardening stainless steel flux-cored wire for continuous roller submerged arc overlaying and a preparation method thereof. The flux-cored wire consists of chemical powder and an external carbon steel strip; the chemical powder is 35.0-38.0% of the total weight of the wire; and the chemical powder comprises the following components in percentage by weight: 29.0-31.0% of metal chromium powder, 25.0-26.5% of low-carbon ferrochromium, 12.0-13.0% of metal nickel powder, 10.0-11.5% of metal copper powder, 0.8-1.2% of electrolytic metal manganese, 1.0-1.5% of ferroniobium, 0.1-0.8% of metal molybdenum powder, 0.3-0.6% of ferrotitanium, 2.0-2.5% of rare earth ferrosilicon, 0.3-0.6% of metal aluminum powder, 8.0-10.0% of barium fluoride, and the balance ironpowder. In the flux-cored wire, an overlaying layer achieves excellent wear resistance, corrosion resistance, cold and hot fatigue resistance and tempering softening resistance, so that the service life of continuous rollers can be prominently prolonged.

Description

technical field [0001] The invention relates to a precipitation-hardening stainless steel flux-cored wire for surfacing welding of continuous casting rolls and a preparation method thereof, belonging to the welding field of material processing engineering. Background technique [0002] The working conditions of continuous casting rolls are very harsh, and they need to bear the cyclic load caused by conveying high-temperature billets and the alternating thermal cycle caused by spray cooling. Continuous casting rolls are required to have good wear resistance, corrosion resistance and cold and heat fatigue resistance. . With the development of continuous casting technology and the upgrading of continuous casting steel, the temperature of continuous casting slabs rises, and the requirements for the temper softening resistance of continuous casting rolls are also put forward. High-temperature continuous casting slabs are transported on continuous casting rolls, equivalent to Per...

Claims

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Application Information

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IPC IPC(8): B23K35/02B23K35/30B23K35/40
CPCB23K35/0266B23K35/3086B23K35/40
Inventor 张迪王英杰王立志王清宝肖静马计平马德志
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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