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Coal mining cutting tooth processed through microbeam plasma arc surface cladding and processing method thereof

A plasma arc and cladding technology, used in the field of coal mining picks, can solve the problems of unsatisfactory picks, achieve high hardness, improve life, and solve the effects of short life

Inactive Publication Date: 2015-02-25
WUYANG COAL MINE OF SHANXI LUAN ENVIRONMENTAL ENERGY DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the problems in the use of picks, various measures have been taken at home and abroad, but the picks currently used are still not ideal

Method used

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  • Coal mining cutting tooth processed through microbeam plasma arc surface cladding and processing method thereof
  • Coal mining cutting tooth processed through microbeam plasma arc surface cladding and processing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] For the finished pick-shaped coal mining pick, the front part of the cone of the pick pick is ground 2 mm within 20 to 30 mm, and then along the conical surface, a layer of wear-resistant alloy is surfacing by using the micro-beam plasma arc cladding process; when surfacing, use high temperature Glue (high temperature resistance above 1000°C) covers the exposed part of the hard alloy head.

[0029] The mass percentage content of the main elements of the wear-resistant alloy is C 1.47%, Fe 2.0%, Si 2.8%, B2.4%, Cr 14%, Ni 58.4%, W16.53%, Co2.4%.

[0030] Microbeam plasma arc cladding process: input power 220V, rated power 4KAV, output current 65A, ion gas flow rate 0.2L / min, powder feeding gas flow rate 0.6L / min, protective gas flow rate 5 L / min, powder feeding volume 30g / min min, the thickness of one surfacing welding is 2mm, the width of one surfacing welding is 4mm, the powder particle size is 100-300 mesh, and the working distance is 10mm.

[0031] Ion gas, powder f...

Embodiment 2

[0034] For the finished pick-shaped coal mining pick, the front part of the cone is ground 2 mm within the range of 20-30 mm, and then along the conical surface, a layer of wear-resistant alloy is surfacing by using the micro-beam plasma arc cladding process; Tin foil covers the exposed part of the carbide head.

[0035] The mass percentage content of the main elements of the wear-resistant alloy is C 1.95%, Fe 4.0%, Si 4.02%, B3.6%, Cr 20%, Ni 47.5%, W16.53%, Co2.4%.

[0036] Microbeam plasma arc cladding process: input power 220V, rated power 4KAV, output current 70A, ion gas flow 0.3L / min, powder feeding gas flow 0.6L / min, protective gas flow 5L / min, powder feeding 40g / min , a surfacing thickness of 2mm, a surfacing width of 4mm, powder particle size of 100-300 mesh, working distance of 10mm.

[0037] Ion gas, powder feeding gas and shielding gas are all 99.99% industrial argon.

[0038] The surface hardness of the wear-resistant alloy coating is HRC61.5.

Embodiment 3

[0040] For the finished knife-type coal mining picks, firstly grind 1-3mm within the range of 20-30mm in the front part, and then use the micro-beam plasma arc cladding process to surfacing a layer of wear-resistant alloy along the conical surface; Cement covers the exposed portion of the carbide head.

[0041] The mass percentage content of the main elements of the wear-resistant alloy is C 1.47%, Si 2.8%, B2.0%, Cr 12%, Ni 62.8%, W16.53%, Co2.4%.

[0042] Microbeam plasma arc cladding process: input power 220V, rated power 4KAV, output current 70A, ion gas flow 0.3L / min, powder feeding gas flow 0.6L / min, protective gas flow 5L / min, powder feeding 40g / min , a surfacing thickness of 2mm, a surfacing width of 4mm, powder particle size of 100-300 mesh, working distance of 10mm.

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Abstract

The invention discloses a coal mining cutting tooth processed through microbeam plasma arc surface cladding and a processing method thereof. The coal mining cutting tooth comprises a cemented carbide head and a coal mining cutting tooth body. A layer of abrasion-resistant alloy is welded in a surfacing mode on the position of 1-3mm polishing depth on the 20-30mm of a cone front portion of a finished product coal mining cutting tooth, except a polishing part on the cone front portion of an exposed part on the cemented carbide head. During the process of surfacing, the exposed part of the cemented carbide head is covered by high-temperature glue and the surface hardness of the abrasion-resistant alloy layer is HRC(Rockwellhardness) 58-62. The invention develops a processing method which not only has high hardness and high abrasion resistance of the surface of the tooth body but also keeps strength and toughness of solder joints and the cemented carbide head. On the basis of simple protection of cutting tooth head, a layer of abrasion-resistant alloy is welded on the front portion of the cutting tooth cone in a surfacing mode through microbeam plasma arc cladding method; thereby the problem of short service life of coal mining cutting tooth during usage is solved and the average service life is prolonged by 50%.

Description

technical field [0001] The invention relates to a coal mining pick and a method for cladding the surface of a micro-beam plasma arc. Background technique [0002] Coal is the main source of energy in our country. A key technology for the coal industry to increase output and improve labor productivity is mining mechanization. The most commonly used mining machinery is the spiral drum shearer, and the used coal cutting tool is called a pick, which is a key part for directly cutting coal and rock on the fully mechanized mining machine. The pick is a vulnerable part, which has a certain impact on the cost per ton of coal. Therefore, improving the quality of the pick and prolonging its service life are of great significance to improving the working efficiency of the shearer and reducing the production cost. [0003] Picks are basically divided into two categories: knife picks and pick picks. Now, both at home and abroad, the cemented carbide head and the tooth body are brazed t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C35/183C23C4/06C22C19/05B23K10/02C23C24/10
Inventor 杜洪奎曲方王强佐江宏李旭斌王俊章李忠群张志兵彭程芳
Owner WUYANG COAL MINE OF SHANXI LUAN ENVIRONMENTAL ENERGY DEV CO LTD
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