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Niobium-strengthened wear-resisting surfacing electrode and preparation method thereof

A surfacing welding rod and welding core technology, applied in welding equipment, welding medium, manufacturing tools, etc., can solve the problems of low toughness reserve, fracture and spalling, etc., achieve less welding smoke, stable welding arc, anti-porosity and anti-welding crack ability Effect

Inactive Publication Date: 2015-04-01
HOHAI UNIV CHANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used cast iron surfacing alloys, although they have high hardness, have low toughness reserves, and are prone to fracture and spalling under high impact loads, resulting in failure

Method used

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  • Niobium-strengthened wear-resisting surfacing electrode and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] figure 1 It is a process flow chart of the preparation method described in the present invention.

[0037] Such as figure 1 Shown: the preparation technology of the embodiment of the present invention 1 is:

[0038] (1) Dry blending of the components of the coating: in terms of mass percentage, weigh the components of the coating: marble: 40%; fluorite: 25%; titanium dioxide: 8%; zircon sand: 8%; Feldspar: 6%; rare earth silicon 8%; ferroniobium: after 5%, dry blending;

[0039] (2) Wet mixing: wet mixing the components after the dry mixing of the drug skin with the binder potassium sodium water glass;

[0040] (3) Preparation of niobium-enhanced wear-resistant surfacing electrode: the wet-mixed material and the welding core were rubbed, dried, and dried to obtain the target product. The welding core was 1Cr13 martensitic stainless steel with a diameter of Φ3.2mm, and The thickness of the drug skin is 2.0~2.5mm. After testing, the average hardness of the electrode ...

Embodiment 2

[0042] The preparation technology of the embodiment of the present invention 1 is:

[0043] (1) Dry blending of the components of the coating: in terms of mass percentage, weigh the components of the coating: marble: 45%; fluorite: 25%; titanium dioxide: 8%; zircon sand: 4%; Feldspar: 4%; rare earth silicon: 6%; ferroniobium: 8%, after dry mixing;

[0044] (2) Wet mixing: wet mixing the components after the dry mixing of the drug skin with the binder clay;

[0045] (3) Preparation of niobium-enhanced wear-resistant surfacing electrode: rubbing, drying, and drying the wet-mixed material and the welding core to obtain the target product. The welding core is 2Cr13 martensitic stainless steel with a diameter of Φ4.0mm, and The thickness of the drug skin is 2.0~2.5mm. After testing, the average hardness of the electrode surfacing layer is 55HRC.

Embodiment 3

[0047] The preparation technology of the embodiment of the present invention 1 is:

[0048] (1) Dry mixing of the components of the coating: in terms of mass percentage, weigh the components of the coating Marble: 50%; Fluorite: 15%; Titanium dioxide: 4%; Zircon sand: 8%; Potassium Feldspar: 7%; rare earth silicon: 5%; ferroniobium: after 10%, dry blending;

[0049] (2) Wet mixing: wet mixing the components after dry mixing of the drug skin with the binder slaked lime;

[0050] (3) Preparation of niobium-enhanced wear-resistant surfacing electrode: the wet-mixed material and the welding core were rubbed, dried, and dried to obtain the target product. The welding core was 1Cr13 martensitic stainless steel with a diameter of Φ4.0mm, and The thickness of the drug skin is 2.0~2.5mm. After testing, the average hardness of the electrode surfacing layer is 59HRC.

[0051] The steel core used in the above embodiments has a diameter of Φ3.0-5.0 mm.

[0052] The present invention util...

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Abstract

The invention discloses a niobium-strengthened wear-resisting surfacing electrode. The niobium-strengthened wear-resisting surfacing electrode comprises an electrode core and an electrode coating coated on the surface of the electrode core. By weight percentage, the electrode coating is composed of 30-50% of marble, 15-25% of fluorite, 4-10% of titanium dioxide, 3-8% of zircon sand, 3-8% of potash feldspar, 4-8% of rare earth silicon and 3-10% of ferroniobium. The invention also discloses a preparation method of the niobium-strengthened wear-resisting surfacing electrode. The niobium-strengthened wear-resisting surfacing electrode is strengthened through niobium and prepared through market materials, can obviously improve the hardness and the wear resistance of surfacing layers and ensure high welding technological properties of welding electrodes, and meanwhile, is low in cost. The actual application results show that, during the surfacing process, the niobium-strengthened wear-resisting surfacing electrode is simple in arc striking and re-arcing, stable in arcing, less prone to arc interruption, high in blowing force, low in welding smoke, small in spatter granularity, high in fusing efficiency and easy to deslag; surfacing joints are fine in waviness, smooth in surface and free from cracking, undercut and the like.

Description

technical field [0001] The invention relates to a niobium-strengthened wear-resistant surfacing welding electrode and a preparation method thereof, belonging to the technical field of welding materials, and is suitable for composite manufacturing and remanufacturing of rolls, excavator bucket teeth, steam turbine blades, and the like. Background technique [0002] Construction machinery components serving in abrasive conditions are not only subject to wear damage, but also often accompanied by impact, corrosion and other damage. Although the commonly used cast iron surfacing alloys have high hardness, they have low toughness reserves, and are prone to fracture and spalling under high impact loads, resulting in failure. [0003] It is generally believed that an effective way to enhance the surface strength of materials and improve wear resistance is to provide surface hardness and toughness of materials. The ideal structure is to uniformly distribute high melting point, high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/32B23K35/40
CPCB23K35/365B23K35/3602B23K35/404
Inventor 杨可杨克包晔峰蒋永锋
Owner HOHAI UNIV CHANGZHOU
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