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High-hardness high-wear-resistant surfacing electrode for multilayer surfacing

A multi-layer surfacing welding and surfacing electrode technology, which is applied in the direction of welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of difficulty in meeting wear resistance requirements, difficulty in improving welding efficiency, and low toughness of surfacing layers. problem, to achieve the effect of metallurgical combination, low price and simple production process

Inactive Publication Date: 2012-06-27
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the wear-resistant surfacing electrodes used in industrial production are mainly Fe-Cr-C or Fe-Cr-C-B wear-resistant surfacing electrodes. The surfacing metals of these traditional surfacing electrodes contain more chromium-iron Although composite carbides have good wear resistance, there are still certain limitations in use, and it is difficult to meet the wear resistance requirements under higher wear conditions.
In order to improve the hardness of the surfacing layer, precious metals such as tungsten, nickel, and niobium can be added to the electrode, but this method leads to high cost of the electrode on the one hand, and on the other hand, the toughness of the surfacing layer welded by using this electrode is low. , easy to peel off, only limited to single-layer surfacing application, it is difficult to improve welding efficiency

Method used

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  • High-hardness high-wear-resistant surfacing electrode for multilayer surfacing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] High hardness and high wear resistance welding electrodes for multi-layer surfacing, such as figure 1 As shown, it consists of a solder skin 1 and a flux core 2, the solder skin 1 is a thin-walled tube, the flux core 2 is filled inside the solder skin 1, and both ends of the solder skin 1 are sealed; the flux core 2 includes the following components , and the weight ratio of each component is:

[0025] metallized diamond 18,

[0026] Carbide 27,

[0027] Pre-alloyed powder 55.

[0028] The specific weight of each component is: 5 grams of 60 mesh synthetic diamond, 4 grams of YQ4 type 20 mesh spherical hard alloy, 3.5 grams of YQ4 type 40 mesh spherical hard alloy, and 15.3 grams of nickel-based pre-alloyed powder.

[0029] Its preparation method is as follows: firstly, according to the above formula, take the raw materials of drug core 2 and mix them evenly for use, take galvanized white iron sheet with a thickness of 0.2mm, the length of the white iron sheet is 350m...

Embodiment 2

[0031] High hardness and high wear resistance welding electrodes for multi-layer surfacing, such as figure 1 As shown, it consists of a solder skin 1 and a flux core 2, the solder skin 1 is a thin-walled tube, the flux core 2 is filled inside the solder skin 1, and both ends of the solder skin 1 are sealed; the flux core 2 includes the following components , and the weight ratio of each component is:

[0032] metallized diamond 25,

[0033] Carbide 35,

[0034] Pre-alloyed powder 38.

[0035] The specific weight of each component is: 80 mesh artificial diamond 7 grams, YQ4 type 30 mesh spherical hard alloy 5 grams, YQ4 type 60 mesh spherical hard alloy 4.8 grams, cobalt-based pre-alloyed powder 10.6 grams.

[0036] The preparation method is as follows: firstly, according to the above formula, take the raw materials of drug core 2 and mix them evenly for use; take galvanized white iron sheet with a thickness of 0.2 mm, the length of the white iron sheet is 350 mm, and the wi...

Embodiment 3

[0038] High hardness and high wear resistance welding electrodes for multi-layer surfacing, such as figure 1 As shown, it consists of a solder skin 1 and a flux core 2, the solder skin 1 is a thin-walled tube, the flux core 2 is filled inside the solder skin 1, and both ends of the solder skin 1 are sealed; the flux core 2 includes the following components , and the weight ratio of each component is:

[0039] metallized diamond 26,

[0040] Carbide 22,

[0041] Pre-alloyed powder 52.

[0042] The specific weight of each component is: 7.5 grams of 70 mesh synthetic diamond, 3 grams of YQ4 type 20 mesh spherical hard alloy, 3.4 grams of YQ4 type 60 mesh spherical hard alloy, and 15.1 grams of iron-based pre-alloyed powder.

[0043] The preparation method is as follows: firstly, according to the above formula, take the raw materials of drug core 2 and mix them evenly for use; take galvanized white iron sheet with a thickness of 0.2 mm, the length of the white iron sheet is 350...

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Abstract

The invention discloses a high-hardness high-wear-resistant surfacing electrode for multilayer surfacing, which comprises a welding covering (1) and a flux core (2), wherein the welding covering (1) is a thin-walled tube, the flux core (2) is filled inside the welding covering (1), and two ends of the welding covering (1) are sealed. The flux core (2) comprises the following components in weight percent: 18-26% of metalized diamond, 22-35% of hard alloy and 38-55% of pre-alloyed powder. The high-hardness high-wear-resistant surfacing electrode has the advantages that the electrode is reasonable in structure, scientific in formula and low in cost, the surfacing hardness of a multilayer surfacing layer using the electrode can reach HRC (Rockwell hardness) 62-66, the wear resistance of the electrode is 3-5 times as high as that of a chromium-iron complex carbide surfacing electrode, the electrode is not easy to strip so that the service life of a workpiece is greatly prolonged, and the two ends of the welding covering are sealed so that the flux core is well sealed and is free of powder leakage and moisture absorption.

Description

technical field [0001] The invention relates to the technical field of welding rods, in particular to a high-hardness and high-wear-resistance welding rod for multi-layer surfacing welding that can improve wear resistance. Background technique [0002] At present, the wear-resistant surfacing electrodes used in industrial production are mainly Fe-Cr-C or Fe-Cr-C-B wear-resistant surfacing electrodes. The surfacing metals of these traditional surfacing electrodes contain more chromium-iron Although composite carbides have good wear resistance, they still have certain limitations in use, and it is difficult to meet the wear resistance requirements under higher wear conditions. In order to improve the hardness of the surfacing layer, precious metals such as tungsten, nickel, and niobium can be added to the electrode, but this method leads to high cost of the electrode on the one hand, and on the other hand, the toughness of the surfacing layer welded by using this electrode is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/34
Inventor 黄本生黄龙鹏薛屺杨眉刘清友
Owner SOUTHWEST PETROLEUM UNIV
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