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Half steel roller submerged arc building-up flux-cored wire

A technology of submerged arc surfacing and flux-cored welding wire, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc. Problems such as fatigue performance and high temperature wear performance cannot be guaranteed

Active Publication Date: 2007-11-28
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is mainly used in roll materials, cold stamping dies, cold shear toughness, gears, cams, etc. used at room temperature. Its high temperature thermal fatigue resistance and high temperature wear performance cannot be guaranteed.
[0007] The invention patent with application number 03103971.5 discloses a wear-resistant surfacing flux-cored welding wire, which is characterized in that it is made by adding appropriate proportions of high-carbon ferrochrome, graphite, tungsten iron, molybdenum iron, vanadium iron, niobium iron and other powders. Flux-cored wire, its application field is suitable for low-temperature medium-speed coal mill grinding roller sleeves and lining tiles, there is no relevant application report for high-temperature wear resistance and high-temperature build-up resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1. Mix low-carbon ferrochrome, high-carbon ferrochrome, ferromanganese, silicon-manganese alloy, ferronickel, ferromolybdenum, ferro-vanadium and other alloy powders according to the proportion, and make flux-cored welding wire according to the method shown in the manual. The weight percentage of welding wire composition is C1.1, Mn1.8, Si0.6, Cr20, Ni1.7, Mo0.6, V0.25 and the balance is Fe. The material composition (weight percentage) of the semi-steel turning roller is: C1.3~1.5, Mn0.5~1.5, Si0.5~1.5, Cr0.8~1.2, Ni≥0.20, Mo0.2~0.6, P≤0.030 , S≤0.030, the balance is Fe. After the fatigue layer is turned, surfacing welding is carried out. The welding process is as follows:

[0018] Wire diameter: Φ4.0mm;

[0019] Preheating temperature: 300°C;

[0020] Welding current: 400~500A;

[0021] Welding voltage: 28~34V.

[0022] Put the surfacing semi-steel turning roll into the heat treatment furnace immediately, heat it to 600°C, keep it warm for 8 hours, and ...

Embodiment 2

[0023] Embodiment 2. Mix alloy powders such as low-carbon ferrochrome, high-carbon ferrochrome, ferromanganese, silicon-manganese alloy, ferronickel, and ferromolybdenum according to the proportion, and make flux-cored welding wire according to the method shown in the manual, and the composition weight of the flux-cored welding wire The percentage is C1.6, Mn2.1, Si0.3, Cr19, Ni2.4, Mo0.9, P≤0.030, S≤0.030, and the balance is Fe. The material composition (percentage by weight) of the semi-steel roll is: C1.5~1.7, Mn0.5~1.5, Si0.5~1.5, Cr0.8~1.2, Ni≥0.20, Mo0.2~0.6, P≤0.030, S ≤0.030, the balance is Fe. After the fatigue layer is turned, surfacing welding is carried out. The welding process is as follows:

[0024] Wire diameter: Φ3.2mm;

[0025] Preheating temperature: 300°C;

[0026] Welding current: 350~450A;

[0027] Welding voltage: 28~34V.

[0028] Put the surfacing semi-steel roll into the heat treatment furnace immediately, heat it to 600°C, keep it warm for 8 hours...

Embodiment 3

[0029] Embodiment 3. Mix alloy powders such as low-carbon ferrochrome, high-carbon ferrochrome, ferromanganese, silicon-manganese alloy, ferronickel, and ferrovanadium according to the proportion, and make flux-cored welding wire according to the method shown in the manual, and the composition weight of the flux-cored welding wire The percentage is C1.4, Mn1.8, Si0.6, Cr20, Ni2.3, V0.35 and the balance is Fe. The material composition (weight percentage) of the semi-steel turning roller is: C1.3~1.5, Mn0.5~1.5, Si0.5~1.5, Cr0.8~1.2, Ni≥0.20, Mo0.2~0.6, P≤0.030 , S≤0.030, the balance is Fe. After the fatigue layer is turned, surfacing welding is carried out. The welding process is as follows:

[0030] Wire diameter: Φ4.0mm;

[0031] Preheating temperature: 300°C;

[0032] Welding current: 400~500A;

[0033] Welding voltage: 28~34V.

[0034] Put the semi-steel turning roll after surfacing into the heat treatment furnace immediately, heat it to 600°C, keep it warm for 8 hours...

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Abstract

The present invention relates to one kind of flux-core wire for submerged arc build-up welding of semisteel roller, and the flux-core wire may be applied widely in the build-up welding repair of semisteel plate, roller, etc. The flux-core wire has the chemical components comprising C 1.0-2.5 wt%, Mn 1.0-2.5 wt%, Si 0.2-1.5 wt%, Cr 12-22 wt%, Ni 0.5-2.5 wt%, Mo 0-1.5 wt%, V 0-0.5 wt%, P less than or equal to 0.030 wt%, S less than or equal to 0.030 wt%, and Fe for the rest. When the flux-core wire is used in build-up welding under SJ107 flux protection, the weld seam metal has hardness of HRC35-45 and may reach hardness of HRC45-55 after heat treatment at 600 deg.c. The deposited metal has high toughness, excellent high temperature wear resistance and excellent heat fatigue resistance.

Description

technical field [0001] The invention relates to a welding material, which is especially suitable for surfacing welding of semi-steel rollers. It can be widely used in submerged arc surfacing repair of semi-steel profiles, wire rod hot rolls, turning rolls, etc. Background technique [0002] Due to the partial wear of mechanical parts, it is common for the whole spare parts to fail prematurely, and most of the workpieces can continue to be used through repair methods. Overlay welding is an important repair method among many repair methods. [0003] Since the hot rolling rolls and turning rolls of profiles and wires are used at high temperatures of 1000-1200 °C, they are required to have good high-temperature strength, high-temperature wear resistance, and anti-sticking steel properties. At present, semi-steel materials are widely used. Limited by the material, the high-temperature wear resistance of semi-steel rolls is generally low. Generally, the service life of semi-steel...

Claims

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Application Information

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IPC IPC(8): B23K35/30
Inventor 张飞虎董现春陈延青周丹津王敬礼孔凤华鞠建斌邱利
Owner SHOUGANG CORPORATION
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