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A new type of wear-resistant welding wire for coal shearer and its application method

A coal mining machine and welding wire technology, which is applied to welding equipment, welding medium, welding equipment, etc., can solve the problems of long delivery time, achieve various methods, improve welding performance, and achieve obvious repair effects

Active Publication Date: 2021-11-23
XIAN COAL MINING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The advantages of DO15 welding wire are high production efficiency, high hardness of the wear-resistant layer, the hardness value is HRC54~HRC58, and the impact resistance of the wear-resistant layer is good; the disadvantage is that it takes a long time to arrive from abroad

Method used

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  • A new type of wear-resistant welding wire for coal shearer and its application method

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Experimental program
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Effect test

Embodiment 1

[0029] The new wear-resistant welding wire for shearer of this embodiment is composed of the following components in mass percentage: C 0.47%, Si0.72%, Mn 1.1%, P 0.014%, S 0.02%, Cr 5.0%, Mo 1.78%, V 0.38%, W 1.8%, and the balance is Fe.

[0030] After testing, the hardness value of the wear-resistant layer of the welding wire in this example is HRC58-HRC60, and the hardness value of the wear-resistant layer after aging at 550°C for 8 hours is HRC56-HRC58. After testing, the wear-resistant layer has no cracks, pores, slag inclusions, etc. defect.

[0031] The specific process of using the wear-resistant welding wire for the new shearer in this embodiment is as follows: the wear-resistant welding wire is used for manual gas shielded surfacing welding; Single-layer multi-pass welding is adopted, and the width of a single weld bead is 3 mm to 4 mm. When the thickness of the surfacing layer is greater than 4 mm, multi-layer multi-pass welding is adopted, and the width of a singl...

Embodiment 2

[0034] The new wear-resistant welding wire for shearer of this embodiment is composed of the following components in mass percentage: C 0.47%, Si0.72%, Mn 1.1%, P 0.014%, S 0.02%, Cr 5.0%, Mo 1.78%, V 0.38%, W 1.8%, and the balance is Fe.

[0035] After testing, the hardness value of the wear-resistant layer of the welding wire in this example is HRC58-HRC60, and the hardness value of the wear-resistant layer after aging at 550°C for 8 hours is HRC56-HRC58. After testing, the wear-resistant layer has no cracks, pores, slag inclusions, etc. defect.

[0036] The specific process of using the wear-resistant welding wire for the new shearer in this embodiment is as follows: the wear-resistant welding wire is used for manual gas shielded surfacing welding; Single-layer multi-pass welding is adopted, and the width of a single weld bead is 3 mm to 4 mm. When the thickness of the surfacing layer is greater than 4 mm, multi-layer multi-pass welding is adopted, and the width of a singl...

Embodiment 3

[0039] The new wear-resistant welding wire for coal shearers in this embodiment is composed of the following components in mass percentage: C 0.47%, Si0.35%, Mn 1.1%, P 0.014%, S 0.02%, Cr 5.0%, Mo 1.78%, V 0.38%, W 1.8%, and the balance is Fe.

[0040] After testing, the hardness value of the wear-resistant layer of the welding wire in this example is HRC58-HRC58.5, and the hardness value of the wear-resistant layer after aging at 550°C for 8 hours is HRC56-HRC57. After testing, the wear-resistant layer has no cracks, pores, and inclusions Slag and other defects.

[0041] The specific process of using the wear-resistant welding wire for the new shearer in this embodiment is as follows: the wear-resistant welding wire is used for manual gas shielded surfacing welding; Single-layer multi-pass welding is adopted, and the width of a single weld bead is 3 mm to 4 mm. When the thickness of the surfacing layer is greater than 4 mm, multi-layer multi-pass welding is adopted, and the...

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Abstract

The invention discloses a novel wear-resistant welding wire for coal shearers, which is composed of the following components in mass percentage: C less than 0.7%, Si 0.35%-1.3%, Mn 0.8%-1.5%, P less than 0.02%, S less than 0.03% %, Cr 3.5% to 8.0%, Mo 1.2% to 3.0%, V 0.3% to 0.6%, W 0.3% to 1.8%, and the balance is Fe; the invention also discloses a method of using a wear-resistant welding wire. It is suitable for automatic welding of manual gas shielded surfacing welding or special welding machine. The wear-resistant welding wire of the present invention has good welding performance, and the hardness of the wear-resistant layer formed by welding is high, which avoids the phenomenon that the wear-resistant layer falls off or wears the guide rail due to cracks during the use of the shearer, and solves the problem of the wear-resistant layer of the shearer. Particle wear and metal wear problems. The wear-resistant welding wire of the invention has high welding efficiency, good welding quality, reduced work difficulty and strength, and is suitable for popularization.

Description

technical field [0001] The invention belongs to the field of welding wire technology, and in particular relates to a novel wear-resistant welding wire for a coal shearer and a use method thereof. Background technique [0002] The shearer is an indispensable machine in the fully mechanized mining face of the coal mine industry. The shearer is in contact with coal during the working process in the mine and is in a state of wear and tear for a long time. In order to extend the life of the shearer shell, we usually weld wear-resistant materials on the parts that are prone to wear to increase the wear resistance of the shell. [0003] At present, the commonly used wear-resistant welding materials are domestic D322 welding rod and imported DO15 welding wire. The composition and mass content of D322 welding rod and DO15 welding wire are shown in Table 1 and Table 2 below, respectively. [0004] Table 1 Composition and mass content of D322 electrode [0005] Element C ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/12B23K9/04
CPCB23K9/04B23K35/0261B23K35/3053
Inventor 薛强史仁贵王先龙谢杰赵晓辉苏晓静王晟东邓娟
Owner XIAN COAL MINING MACHINERY