A wear-resistant surfacing flux-cored welding wire

Abstract

The invention belongs to the field of welding materials, and particularly relates to an abrasion-resistant surfacing flux-cored wire. The abrasion-resistant surfacing flux-cored wire is formed by wrapping powder with an H08A steel belt and then conducting rolling and drawing. A flux core of the abrasion-resistant surfacing flux-cored wire comprises, by mass, 5%-10% of titanium dioxide, 2%-8% of feldspar, 1%-5% of cryolite, 2%-5% of zirconite, 2%-8% of rare earth silicon, 5%-10% of ferromanganese, 30%-50% of metallic chromium, 8%-20% of ferrotungsten, and the balance iron powder, and the filling rate of the flux core is 20%-40%. The abrasion-resistant surfacing flux-cored wire is suitable for CO2 gas shield surfacing, the dust forming rate during surfacing is low, and the average hardness of a surfacing layer is 50-60; and the abrasion-resistant surfacing flux-cored wire has good strength, tenacity and red hardness and is particularly suitable for being used under the working condition resistant to abrasion generated at the high-temperature of 600 DEG C.

Description

technical field

[0001] The invention belongs to the technical field of welding materials, and in particular relates to a wear-resistant surfacing welding flux-cored welding wire. Background technique

[0002] Surfacing welding, as an economical and rapid process method for surface modification of materials, is more and more widely used in the manufacture and repair of parts in various industrial sectors. In order to play the role of the surfacing layer most effectively, it is hoped that the surfacing welding method adopted has a small dilution of the base metal, a high deposition speed and excellent performance of the surfacing layer, that is, high-quality, high-efficiency, low-dilution rate surfacing welding technology.

[0003] At present, the commonly used wear-resistant surfacing materials contain high carbon and alloy elements, mainly using carbon and chromium, titanium, vanadium, niobium, etc. to form carbide hard points to increase the hardness of the surfacing layer...

Examples

Embodiment 1

[0017] A wear-resistant surfacing flux-cored welding wire, including a sheath and a flux core. The flux core is composed of the following raw materials in mass percentages: 5% titanium dioxide, 3% feldspar, 3% cryolite, 3% zircon, and rare earth silicon 4%, 6% ferromanganese, 35% metallic chromium, 9% ferrotungsten, and the balance is 32% iron powder.

[0018] The wear-resistant surfacing welding flux-cored welding wire of the present invention is wrapped with H08A steel strip and mixed evenly with flux-cored powder, which is rolled and drawn into a flux-cored welding wire with a diameter of 1.6mm, and the filling rate (the percentage of the flux core to the total weight of the flux-cored welding wire) The average hardness of the surfacing layer metal is 52HRC, the amount of dust generated is 37% lower than that of the commercially available flux-cored welding wire, and the wear resistance at 600°C is 15 times that of No. 45 steel.

Embodiment 2

[0020] A wear-resistant surfacing flux-cored welding wire, including a sheath and a flux core. The flux core is composed of the following raw materials in mass percentages: 8% titanium dioxide, 6% feldspar, 4% cryolite, 4% zircon, and rare earth silicon 7%, 8% ferromanganese, 42% metallic chromium, 16% ferrotungsten, and the balance is 5% iron powder.

[0021] The wear-resistant surfacing welding flux-cored welding wire of the present invention is wrapped with H08A steel strip and mixed evenly with flux-cored powder, which is rolled and drawn into a flux-cored welding wire with a diameter of 2.4mm, and the filling rate (the percentage of the flux core to the total weight of the flux-cored welding wire) The average hardness of the surfacing layer metal is 56HRC, the amount of dust generated is 43% lower than that of the commercially available flux-cored welding wire, and the wear resistance at 600°C is 12 times that of No. 45 steel.

Embodiment 3

[0023] A wear-resistant surfacing flux-cored welding wire, including a sheath and a flux core. The flux core is composed of the following raw materials in mass percentages: 5% titanium dioxide, 8% feldspar, 1% cryolite, 5% zircon, and rare earth silicon 2%, 10% ferromanganese, 30% metallic chromium, 20% ferrotungsten, and the balance is 19% iron powder.

[0024] The wear-resistant surfacing welding flux-cored welding wire of the present invention is wrapped with H08A steel strip and mixed evenly with flux-cored powder, which is rolled and drawn to form a flux-cored welding wire with a diameter of 1.8mm, and the filling rate (the percentage of the flux core to the total weight of the flux-cored welding wire) The average hardness of the surfacing layer metal is 50HRC, the amount of dust generated is 51% lower than that of the commercially available flux-cored welding wire, and the wear resistance at 600°C is 10 times that of No. 45 steel.

technical field

[0001] The invention belongs to the technical field of welding materials, and in particular relates to a wear-resistant surfacing welding flux-cored welding wire. Background technique

[0002] Surfacing welding, as an economical and rapid process method for surface modification of materials, is more and more widely used in the manufacture and repair of parts in various industrial sectors. In order to play the role of the surfacing layer most effectively, it is hoped that the surfacing welding method adopted has a small dilution of the base metal, a high deposition speed and excellent performance of the surfacing layer, that is, high-quality, high-efficiency, low-dilution rate surfacing welding technology.

[0003] At present, the commonly used wear-resistant surfacing materials contain high carbon and alloy elements, mainly using carbon and chromium, titanium, vanadium, niobium, etc. to form carbide hard points to increase the hardness of the surfacing layer...

Examples

Embodiment 1

[0017] A wear-resistant surfacing flux-cored welding wire, including a sheath and a flux core. The flux core is composed of the following raw materials in mass percentages: 5% titanium dioxide, 3% feldspar, 3% cryolite, 3% zircon, and rare earth silicon 4%, 6% ferromanganese, 35% metallic chromium, 9% ferrotungsten, and the balance is 32% iron powder.

[0018] The wear-resistant surfacing welding flux-cored welding wire of the present invention is wrapped with H08A steel strip and mixed evenly with flux-cored powder, which is rolled and drawn into a flux-cored welding wire with a diameter of 1.6mm, and the filling rate (the percentage of the flux core to the total weight of the flux-cored welding wire) The average hardness of the surfacing layer metal is 52HRC, the amount of dust generated is 37% lower than that of the commercially available flux-cored welding wire, and the wear resistance at 600°C is 15 times that of No. 45 steel.

Embodiment 2

[0020] A wear-resistant surfacing flux-cored welding wire, including a sheath and a flux core. The flux core is composed of the following raw materials in mass percentages: 8% titanium dioxide, 6% feldspar, 4% cryolite, 4% zircon, and rare earth silicon 7%, 8% ferromanganese, 42% metallic chromium, 16% ferrotungsten, and the balance is 5% iron powder.

[0021] The wear-resistant surfacing welding flux-cored welding wire of the present invention is wrapped with H08A steel strip and mixed evenly with flux-cored powder, which is rolled and drawn into a flux-cored welding wire with a diameter of 2.4mm, and the filling rate (the percentage of the flux core to the total weight of the flux-cored welding wire) The average hardness of the surfacing layer metal is 56HRC, the amount of dust generated is 43% lower than that of the commercially available flux-cored welding wire, and the wear resistance at 600°C is 12 times that of No. 45 steel.

Embodiment 3

[0023] A wear-resistant surfacing flux-cored welding wire, including a sheath and a flux core. The flux core is composed of the following raw materials in mass percentages: 5% titanium dioxide, 8% feldspar, 1% cryolite, 5% zircon, and rare earth silicon 2%, 10% ferromanganese, 30% metallic chromium, 20% ferrotungsten, and the balance is 19% iron powder.

[0024] The wear-resistant surfacing welding flux-cored welding wire of the present invention is wrapped with H08A steel strip and mixed evenly with flux-cored powder, which is rolled and drawn to form a flux-cored welding wire with a diameter of 1.8mm, and the filling rate (the percentage of the flux core to the total weight of the flux-cored welding wire) The average hardness of the surfacing layer metal is 50HRC, the amount of dust generated is 51% lower than that of the commercially available flux-cored welding wire, and the wear resistance at 600°C is 10 times that of No. 45 steel.