Surfacing flux-cored wire and method for enhancing tenacity of surfacing deposited metal

Abstract

The invention provides a surfacing flux-cored wire which is characterized by being prepared from a steel strip and the following flux core raw materials: in each 1000 g of flux core raw materials, 90 g of chromium carbide, 20 g of vanadium carbide, 20 g of niobium carbide, 30 g of ferrovanadium, 54 g of ferrocolumbium, 100 g of chromium powder, 120 g of nickel, 16 g of molybdenum, 21 g of 75 ferrosilicon, 50 g of manganese, and 479 g of iron powder. The invention also provides a method for enhancing the tenacity of a surfacing deposited metal through surfacing by virtue of the surfacing flux-cored wire. The method is capable of changing the different addition forms and amounts of carbides of alloys to the surfacing flux-cored wire without changing the content of the alloys of the surfacing deposited metal, thus changing the micro-morphology of martensite and improving the tenacity of the surfacing deposited metal.

Description

technical field

[0001] The invention relates to a flux-cored welding wire, in particular to a flux-cored welding wire used in surfacing welding composite manufacturing technology. Background technique

[0002] Rolls are one of the main consumable spare parts in steel rolling production. With the development of rolled materials, the continuous improvement of rolling mill speed and automation, the rolling technology has a great impact on the quality of rolls, especially the strength, toughness, wear resistance and roughness resistance of rolls. Higher requirements have also been put forward. The obvious trend in the development of roll materials is to widely use alloying elements and gradually increase the degree of alloying, the hardness of the roll or the thickness of the hardened layer.

[0003] Overlay welding composite remanufacturing is an important branch in the field of welding technology, and it is a surface technology treatment method. Since the 1970s, with the exte...

Examples

Embodiment 1

[0035] Embodiment 1 (technical scheme 1 of the present invention): every 1000 grams of drug core raw materials contain: chromium carbide: 90 grams, vanadium carbide: 20 grams, niobium carbide: 20 grams, vanadium iron: 30 grams, niobium iron: 54 grams, Chromium powder: 100 grams, nickel: 120 grams, molybdenum: 16 grams, 75 ferrosilicon: 21 grams, manganese: 50 grams, iron powder: 479 grams.

Embodiment 2

[0036] Embodiment 2 (technical scheme 2 of the present invention): every 1000 grams of drug core raw materials contain: chromium powder: 176 grams, vanadium carbide: 30 grams, niobium carbide: 60 grams, vanadium iron: 14 grams, nickel: 120 grams, molybdenum : 16 grams, 75 ferrosilicon: 21 grams, manganese: 50 grams, iron powder: 505 grams, graphite: 8 grams.

[0037] According to the formula of the comparative example and the embodiment, the powder of each component is mixed uniformly in the powder mixer; the steel strip is rolled into a U-shaped cross section on the wire rolling machine, and the mixed powder is added to the U-shaped groove of the steel strip. Then the U-shaped steel strip is rolled into a welding wire blank tube of Φ3mm~5mm; the welding wire blank tube is drawn to the finished size of Φ2.4mm~4.0mm by a multi-connected linear wire drawing machine, and then the standard layer is wound by a layer winding machine Roll around.

[0038] The surfacing flux-cored wi...

technical field

[0001] The invention relates to a flux-cored welding wire, in particular to a flux-cored welding wire used in surfacing welding composite manufacturing technology. Background technique

[0002] Rolls are one of the main consumable spare parts in steel rolling production. With the development of rolled materials, the continuous improvement of rolling mill speed and automation, the rolling technology has a great impact on the quality of rolls, especially the strength, toughness, wear resistance and roughness resistance of rolls. Higher requirements have also been put forward. The obvious trend in the development of roll materials is to widely use alloying elements and gradually increase the degree of alloying, the hardness of the roll or the thickness of the hardened layer.

[0003] Overlay welding composite remanufacturing is an important branch in the field of welding technology, and it is a surface technology treatment method. Since the 1970s, with the exte...

Examples

Embodiment 1

[0035] Embodiment 1 (technical scheme 1 of the present invention): every 1000 grams of drug core raw materials contain: chromium carbide: 90 grams, vanadium carbide: 20 grams, niobium carbide: 20 grams, vanadium iron: 30 grams, niobium iron: 54 grams, Chromium powder: 100 grams, nickel: 120 grams, molybdenum: 16 grams, 75 ferrosilicon: 21 grams, manganese: 50 grams, iron powder: 479 grams.

Embodiment 2

[0036] Embodiment 2 (technical scheme 2 of the present invention): every 1000 grams of drug core raw materials contain: chromium powder: 176 grams, vanadium carbide: 30 grams, niobium carbide: 60 grams, vanadium iron: 14 grams, nickel: 120 grams, molybdenum : 16 grams, 75 ferrosilicon: 21 grams, manganese: 50 grams, iron powder: 505 grams, graphite: 8 grams.

[0037] According to the formula of the comparative example and the embodiment, the powder of each component is mixed uniformly in the powder mixer; the steel strip is rolled into a U-shaped cross section on the wire rolling machine, and the mixed powder is added to the U-shaped groove of the steel strip. Then the U-shaped steel strip is rolled into a welding wire blank tube of Φ3mm~5mm; the welding wire blank tube is drawn to the finished size of Φ2.4mm~4.0mm by a multi-connected linear wire drawing machine, and then the standard layer is wound by a layer winding machine Roll around.

[0038] The surfacing flux-cored wi...

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