CN1045439A - Cutting pick with high-hard antiwear coating and technology - Google Patents
Cutting pick with high-hard antiwear coating and technology Download PDFInfo
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- CN1045439A CN1045439A CN89101285A CN89101285A CN1045439A CN 1045439 A CN1045439 A CN 1045439A CN 89101285 A CN89101285 A CN 89101285A CN 89101285 A CN89101285 A CN 89101285A CN 1045439 A CN1045439 A CN 1045439A
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Abstract
The invention belongs to spraying (weldering) field, surface.
The present invention relates to a kind of pick product and preparation technology thereof who has high-hard antiwear coating.
Major technique feature of the present invention is to utilize specific hot spraying (weldering) technology, and at coal winning machine cutting bit body head surfacing one deck high hardness wear-resisting alloy, this alloy-layer and pick body have good metallurgical binding and have the characteristics of high hard wear-resisting not embrittlement.Product of the present invention has good mechanical performance, and its life-span is than about the high 0.5-1 of traditional tungsten carbide button pick times, and preparation technology is simple.
Description
The invention belongs to spraying (weldering) field, surface.
The present invention be more particularly directed to a kind of novel pick and preparation technology thereof.
Pick is mounted in the main part that directly cuts the coal seam on the coal mining machine roller and finish the coal mining function, and its performance and life-span directly influence the utilization rate and the coal mining efficient of coal-winning machine.Its architectural feature is, pick by the pick body (accompanying drawing 1, a) and garden cylindricality carbide alloy insert (accompanying drawing 1, b) two parts are formed, its pick end of body is installed in the pick box on the coal mining machine roller, carbide alloy is inserted and is welded on the head of pick body.Different its concrete shape and size of pick model are also slightly different.
The method of producing pick at present both at home and abroad comprises 1. die forging production pick chaeta base; 2. the pick body is heat-treated; 3. hole at pick body head; 4. (or two a) carbide alloy is inserted welding (being generally copper brazing) in pick body head bore; 5. repair and process.
Adopt the pick of said method production to exist following problems, be hit brittle fracture easily takes place 1. because carbide alloy is inserted firmly and crisply; 2. because the copper brazing bond strength is low, carbide alloy is inserted and is easily separated with the pick body.
The object of the present invention is to provide a kind of novel pick, its not only simple in structure but also functional performance also is better than traditional pick.Another object of the present invention provides a kind of preparation method of novel pick.Technical characterictic of the present invention is to utilize the method for hot surfacing or plasma spray at the certain thickness high rigidity of pick body head surfacing one deck (HRC＞58) wear-resistant alloy layer, this alloy-layer and pick body have good metallurgical binding, its thickness is at 2-5mm, thereby replaces traditional carbide alloy abaculus.
The invention will be further described below in conjunction with accompanying drawing.Wherein Fig. 1 is the tabular pick structural representation of prior art, and Fig. 2 is a pick structural representation of the present invention.
As shown in Figure 1, traditional pick is made of pick body a and the carbide alloy b two parts of inserting.Because it is inserted soldering combination that carbide alloy is inserted between b and the pick body a, therefore in pick body e district, easily produce stress and concentrate, this stress is concentrated the sealing-off and the fragmentation that can cause carbide alloy to insert b.
Novel pick structure of the present invention comprises pick body a ' and wear-resistant coating b ' as shown in Figure 2.Pick body a ' can be by medium carbon alloy steel such as 35CrMo, 42CrMo, 35CrMnMo, 35CrMnSi etc. through die forging machine-shaping, also available ductile iron such as QT40-17, QT60-2 or cast forms such as malleable cast iron such as KT60-5, medium carbon alloy steel commonly used needs with the coal mining that is suitable for hard coal seam through die-forging forming.The shape of pick body a ' is mainly decided to guarantee to install firm, convenient disassembly, stressed reasonable according to the structure of coal winning machine cutting bit seat.
The pick body a ' that makes must be through appropriate heat treatment to improve its intensity and toughness.Be generally modifier treatment for its Technology for Heating Processing of medium carbon alloy steel pick body; Be generally casting attitude or annealing for ductile iron and malleable cast iron.
Adopt pick body a ' head surfacing last layer high hardness wear-resisting alloy-layer or the intersection trench of earlier at pick body head boring several φ 5-φ 10 holes or the certain depth more thereon surfacing one floor height hard wear-resistant alloy layer of hot method for spray-welding after heat treatment.Used spray material is iron-based, Ni-based or cobalt base self-fluxing alloy powder, and the hardness of its spray-welding coating should be more than HRC58, and the dust head for the Ni62(composition is, Ni is surplus, 16%Cr, 3.5%B, 4%Si, 1.0%C, 10%W ,≤14%Fe); The Ni60(composition is that Ni is surplus, 16%Cr, 3.5%B, 4.5%Si, 0.8%C ,≤15%Fe); NiWC25(Ni60+25%WC); NiWC35(Ni60+35%WC); NiWC50(Ni60+50%WC); Powder 325 etc.The granularity of powder is-150.Used surfacing instrument can be oxy-acetylene spray fusing rifle or plasma spraying rifle, general normal employing oxy-acetylene spray fusing rifle.When adopting oxygen-acetylene welding, its flame should be neutral flame or micro-carbon flame, and the preceding workpiece of surfacing should polish unsalted surface and through suitably giving heat, giving hot temperature is 150-300 ℃.The surfacing alloy-layer should be wedge shape and distribute, and most advanced and sophisticated place is the thickest, and average thickness is at 3-5mm, and the thickness generally is no more than 7mm.Pick behind the surfacing again through simple finishing so that the most advanced and sophisticated curvature that is is garden arcuation cutting edge about 15 °, so just make cutting pick with high-hard antiwear coating.
Product of the present invention is compared with existing pick, have following advantages 1. high-hard antiwear coating and pick body have good metallurgical binding, the bond strength height, the load-carrying ability that withstands shocks is big, thereby the life-span is long; 2. manufacture craft is simple, does not use expensive carbide alloy, and cost is lower; 3. surfacing again after the alloy coat wearing and tearing, the pick body is reusable; 4. select different pick body materials and different surfacing alloyed powders, can be made into the pick of different performance to adapt to different coal seams, can make the seriation of pick performance.
Claims (4)
1, a kind of preparation method of high hardness wear-resisting coating pick comprises: 1. prepare pick body a ' (accompanying drawing 2); 2. the pick body is heat-treated; 3. at (Fig. 2) or the first high hard wear-resistant alloy layer b ' of surfacing again after shaped groove of pick head or boring of the high hard wear-resistant alloy layer b ' of the direct surfacing of pick body a ' head; 4. the pick behind the surfacing is repaired processing.It is characterized in that: said pick body a ' is by carbon steel, low-alloy steel, ductile iron or malleable cast iron preparation; Said wear-resistant alloy layer b ' is that make through surfacing at iron-based, Ni-based or cobalt-based spraying smelting alloy powder end.
2, according to the method for claim 1, said pick body a ' is through die-forging forming by charcoal steel among 45 steel, 35CrMo, 35CrMnMo, 35CrMnSi, the 42CrMo etc. or medium carbon alloy steel; Said ductile iron, malleable cast iron are through casting shape by QT40-17, QT60-2, KT33-8, KT60-5 etc.
3, according to the process of claim 1 wherein be to pick body a ' heat-treating process method, modifier treatment, ten average temperings that quench are handled or means of isothermal quenching.
4,, it is characterized in that said hot method for spray-welding is oxygen-acetylene welding and plasma spray according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89101285A CN1045439A (en) | 1989-03-07 | 1989-03-07 | Cutting pick with high-hard antiwear coating and technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89101285A CN1045439A (en) | 1989-03-07 | 1989-03-07 | Cutting pick with high-hard antiwear coating and technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1045439A true CN1045439A (en) | 1990-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89101285A Pending CN1045439A (en) | 1989-03-07 | 1989-03-07 | Cutting pick with high-hard antiwear coating and technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1045439A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051830C (en) * | 1996-01-20 | 2000-04-26 | 山东矿业学院 | Process for teeth of coal mining machine |
| CN101684730A (en) * | 2004-03-26 | 2010-03-31 | 山特维克知识产权股份有限公司 | Rotary cutting bit |
| CN101804544A (en) * | 2010-03-24 | 2010-08-18 | 山东科技大学 | Cold fitting method for carbide bit of cutting pick |
| CN102240832A (en) * | 2011-05-27 | 2011-11-16 | 自贡市巨光硬面材料有限公司 | Manufacture process for high-temperature wear-resistant gears |
| CN102962114A (en) * | 2012-09-12 | 2013-03-13 | 哈尔滨工业大学 | Breaking hammerhead and its manufacturing method |
| CN105257292A (en) * | 2015-09-28 | 2016-01-20 | 安庆市华骐机械配件有限公司 | Corrosion-resistant ultrasonic peening cutting pick |
| CN110388208A (en) * | 2019-06-13 | 2019-10-29 | 太原理工大学 | Plasma abatement thick and hard roof and the method for leaving the compound strong mine pressure of coal column |
-
1989
- 1989-03-07 CN CN89101285A patent/CN1045439A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051830C (en) * | 1996-01-20 | 2000-04-26 | 山东矿业学院 | Process for teeth of coal mining machine |
| CN101684730A (en) * | 2004-03-26 | 2010-03-31 | 山特维克知识产权股份有限公司 | Rotary cutting bit |
| CN101684730B (en) * | 2004-03-26 | 2012-11-21 | 山特维克知识产权股份有限公司 | Rotary cutting bit |
| CN101804544A (en) * | 2010-03-24 | 2010-08-18 | 山东科技大学 | Cold fitting method for carbide bit of cutting pick |
| CN102240832A (en) * | 2011-05-27 | 2011-11-16 | 自贡市巨光硬面材料有限公司 | Manufacture process for high-temperature wear-resistant gears |
| CN102240832B (en) * | 2011-05-27 | 2013-05-01 | 自贡市巨光硬面材料有限公司 | Manufacture process for high-temperature wear-resistant gears |
| CN102962114A (en) * | 2012-09-12 | 2013-03-13 | 哈尔滨工业大学 | Breaking hammerhead and its manufacturing method |
| CN102962114B (en) * | 2012-09-12 | 2015-01-21 | 哈尔滨工业大学 | Manufacturing method of breaking hammerhead |
| CN105257292A (en) * | 2015-09-28 | 2016-01-20 | 安庆市华骐机械配件有限公司 | Corrosion-resistant ultrasonic peening cutting pick |
| CN110388208A (en) * | 2019-06-13 | 2019-10-29 | 太原理工大学 | Plasma abatement thick and hard roof and the method for leaving the compound strong mine pressure of coal column |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
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