CN102489360A - Comb-tooth-type crusher hammer - Google Patents

Comb-tooth-type crusher hammer Download PDF

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Publication number
CN102489360A
CN102489360A CN2011103973023A CN201110397302A CN102489360A CN 102489360 A CN102489360 A CN 102489360A CN 2011103973023 A CN2011103973023 A CN 2011103973023A CN 201110397302 A CN201110397302 A CN 201110397302A CN 102489360 A CN102489360 A CN 102489360A
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China
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percent
tooth
comb
wear
alloy
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CN2011103973023A
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Chinese (zh)
Inventor
于风福
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于风福
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Priority to CN2011103973023A priority Critical patent/CN102489360A/en
Publication of CN102489360A publication Critical patent/CN102489360A/en

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Abstract

The invention relates to a comb-tooth-type crusher hammer. The whole matrix surface of the comb-tooth-type crusher hammer is coated with deposited metal which consists of a transmission layer and a surface wear resistance layer; the alloy of the transmission layer consists of the following components in percentage by mass: 0.1 to 0.6 percent of C, 10 to 25 percent of Cr, 5 to 22 percent of Mn, 0.5 to 9.0 percent of Ni, 0.2 to 1.2 percent of V, 0.3 to 1.5 percent of Mo, and the balance of Fe; and the alloy of the surface wear resistance layer consists of the following components in percentage by mass: 1.2 to 3.5 percent of C, 11 to 32 percent of Cr, 0.3 to 1.5 percent of Si, 0.6 to 3.2 percent of Mn, 0.4 to 0.6 percent of Ni, 0.5 to 2.5 percent of V, 0.5 to 3.4 percent of Mo, 0.9 to 3.8 percent of B, 0.02 to 0.12 percent of rare earth yttrium, and the balance of Fe. The comb-tooth-type crusher hammer is simple in structure, reasonable in composition, high in interface bonding strength, and intensity and toughness, prominent in wear resistance, and long in service life.

Description

The comb-tooth-type grinder hammerhead

Technical field

The present invention relates to a kind of comb-tooth-type disintegrating machine annex, specifically a kind of comb-tooth-type grinder hammerhead of resurfacing welding material processing.

Background technology

China is coal production big country, and the raw coal that obtains through down-hole or strip mining transformation need pass through the multiple tracks broken process and could get into deep-processing process such as washing.Therefore, the consumption of grinder hammerhead is huge.Domestic present situation is: disintegrating machine and consumable accessory thereof---tup, and most of import Britain MMD Company products, the service life of MMD series tup is generally at 2-3 month.Up to now, localization process is not ideal enough always, and the level in service life of homemade tup can only reach 1/3~1/2 of imported product usually.Consume a large amount of foreign exchanges on the one hand, on the other hand, seriously restrict effective performance of coal enterprise's production efficiency.

Generally speaking, the disintegrating machine particularly main failure forms and the common oppositely rolling roller crusher of coal breaker tup is similar, is by due to the heavily stressed squash type wearing and tearing.Different with common oppositely rolling roller crusher is, each broach all is equivalent to an independently cantilever beam in working order down, and except that the flank of tooth need bear bigger compression and strong abrasive wear, tooth root also will bear huge shear stress.This has just proposed challenge to selection.Therefore; Home and abroad manufacturing enterprise has all discharged the anti-wear performance height but the big casting high-chromium alloy of fragility aspect selection at present; Then select for use casting potassium steel or medium carbon low alloy steel to cooperate the manufacturing of rational heat treatment process implementing, in the hope of taking into account wear-resistant and toughness and tenacity.In fact, this selection mode and manufacturing approach have too much been looked after obdurability and have been weakened the performance of abrasion resistance properties.Therefore, present case is: comprise external product, and with regard to service life, still not ideal enough.

Summary of the invention

Technical problem to be solved by this invention is the deficiency that overcomes above-mentioned prior art, provides a kind of simple in structure, forms rationally, has higher intensity and toughness, and wear resistance is outstanding, the comb-tooth-type grinder hammerhead of long service life.

The technical scheme that the present invention solves the problems of the technologies described above employing is: a kind of comb-tooth-type grinder hammerhead; It is characterized in that: its parent adopts cast alloy steel; Parent surface integral coating has deposited metal, and deposited metal is combined by transition zone and surface wear-resistant layer two parts, and the constituent of said transition zone alloy material and mass content are: C 0.1~0.6%, Cr 10~25%, Mn 5~22%, Ni 0.5~9.0%; V 0.2~1.2%, Mo 0.3~1.5%, surplus is Fe; The constituent of said surface wear-resistant layer alloy material and mass content are: C 1.2~3.5%, Cr 11~32%, Si 0.3~1.5%, Mn 0.6~3.2%, Ni 0.4~6.0%, V 0.5~2.5%, Mo 0.5~3.4%, B 0.9~3.8 %, rare earth yttrium 0.02~0.12%, surplus is Fe.

The cutting edge position of comb-tooth-type grinder hammerhead parent of the present invention is provided with some wedge-shaped slots; Be covered with the deposited metal of forming by described transition zone and surface wear-resistant layer through overlaying method in the wedge-shaped slot; Counter blade oral area position is carried out wedge shape and is strengthened; Wherein transition region thickness is 2-4mm, and the remaining space of wedge-shaped slot is filled by surface wear-resistant layer, constitutes appearance even curface wearing layer.

Transition region thickness according to the invention is 2-4mm, and the surface abrasion resistance layer thickness is 3-8mm.

The present invention separately considers the whole obdurability of tup parts and abrasion resistance properties, processes the bimetal wear resistant parts through technique for overlaying, the working surface of tup is carried out wear-resistant built-up welding strengthen; Against existing technologies, the present invention starts with from the material microstructure, takes into account combination property and considers; Integral coating cooperates cutting edge position wedge shape to strengthen; Combination properties such as wear-resistant, toughness and tenacity, anti-extrusion and shock resistance are outstanding, and it is formed rationally, and prescription is simple.Deposited metal is combined by transition zone and superficial layer two parts, when guaranteeing high antiwear property, has improved interface binding power, avoids producing obscission.Significantly improve service life.Test data shows that the present invention has higher intensity and toughness, and wear resistance is outstanding, and long service life can reach 4-6 month its service life, is more than 2 times of import like product.

Description of drawings

Below in conjunction with accompanying drawing the present invention is further specified.

Fig. 1 is the assembling sketch map of a kind of comb-tooth-type grinder hammerhead of the present invention.

Fig. 2 is that the A-A of tup among Fig. 1 is to schematic cross-section.

Fig. 3 is that the B-B of tup among Fig. 1 is to schematic cross-section.

Fig. 4 is the assembling sketch map of the another kind of comb-tooth-type grinder hammerhead of the present invention.

Fig. 5 is the schematic cross-section of tup among Fig. 4.

Label among the figure is: 1. parent, 2. deposited metal, 3. wedge-shaped slot.

The specific embodiment

A kind of comb-tooth-type grinder hammerhead of the present invention is processed the bimetal wear resistant parts through technique for overlaying.Its parent adopts cast alloy steel, and concrete component content is: C 0.25~0.42%, Cr 0.6~6%, Si 0.8~1.8%, Mn 0.5~2.8%, Nb 0.3~1.2, surplus is Fe.Get final heat treatment hardness HRC28~38.This precursor alloy self has enough antiwear properties on the one hand, has higher intensity and toughness on the other hand, can resist the significant shear power that bear at the impulsive force that causes because of loading suddenly and tooth root position.

Parent of the present invention surface integral coating has deposited metal, and deposited metal is combined by transition zone and surface wear-resistant layer two parts, when guaranteeing high antiwear property, improves interface binding power, avoids producing obscission.The constituent of said transition zone alloy material and mass content are: C 0.1~0.6%, Cr 10~25%, Mn 5~22%, Ni 0.5~9.0%, and V 0.2~1.2%, Mo 0.3~1.5%, surplus is Fe; Transition zone deposited metal tissue is the main body mutually with austenite, postwelding air cooling hardness HRC22~35.

Contain more austenitizing forming element---Mn and Ni in the buffer layer material of the present invention, purpose is the institutional framework that acquisition is the main body mutually with austenite.Austenite structure flow harden index on the one hand is high, and itself just has stronger antiwear property under thump or condition of high ground stress; On the other hand; The austenite structure Stability Analysis of Structures, tissue is difficult for changing when continuing the welding wearing layer on its surface, can avoid the generation of interlayer structural stress; Therefore can connect mother metal and wearing layer securely, guarantee that wearing layer does not produce obscission in working order down.

The constituent of surface wear-resistant layer alloy material according to the invention and mass content are: C 1.2~3.5%, Cr 11~32%, Si 0.3~1.5%, Mn 0.6~3.2%, Ni 0.4~6.0%, V 0.5~2.5%, Mo 0.5~3.4%, B 0.9~3.8 %, rare earth yttrium 0.02~0.12%, surplus is Fe.Postwelding air cooling hardness HRC58~64.

Main alloy element of adding in the surface wear-resistant layer of the present invention and the effect of assistant alloy element in deposited metal are following: carbon is that part is dissolved among α-Fe in the alloy at Fe-C-Cr; When Cr content reaches certain value, will form carbide or double carbide with Cr, Fe etc., be the essential element that influences carbide value volume and range of product and abrasion resistance properties.

Boron is positioned at the front of carbon in element cycle of activity in the table, the carbon atom that the boron in the alloy can dissolve in carbide or the displacement carbide forms boride or composition metal carbon-boron compound phase.The microhardness of metal boride or composition metal carbon-boron compound phase is higher than similar metal carbides, and is remarkable to the invigoration effect of target alloy wear-resisting property.In addition, boron can change structural state, the reinforcement crystal boundary of crystal boundary, improves fracture toughness Kic.Boron another important function in alloy is: the eutectic point of iron carbon diagram is moved to left, under the situation of phosphorus content deficiency, eutectic structure occurs, when boron and rare earth synergy, this tendency is more obvious, is called a kind of associating inoculation(effect).

Chromium is main carbide former.The carbide type that possibly form has: Cr 3C, Cr 7C 3, Cr 23C 6, (Fe, Cr) 3C, (Fe, Cr) 23C 6Deng.When having boron to participate in metallurgical process; The carbon-boron compound that the boron atom dissolves in the carbon atom formation chromium in carbide or the displacement carbide possibly appear; The carbon-boron compound hardness of chromium and the stable carbide that is higher than chromium as the hard phase, will be made positive contribution to the raising of alloy wearability.

Silicon is ferrite former normally, turns usefulness into but the existence of boron can partly suppress its ferrite, replaces with the boron synergy to make alloy produce certain self-fluxing nature.

Manganese and nickel are austenite formers, and remained austenite content is many more in the high more hardfacing alloy of content, and is big more to the toughness contribution of alloy.

Molybdenum dissolves in cementite and forms Fe in iron-carbon alloy 2MoC or Fe 4Mo 2C also can be formed directly in MoC, Mo 2C; In the iron-carbon alloy of boracic, possibly form the carbon-boron compound phase of the boride or the molybdenum of molybdenum.

Vanadium has the effect of crystal grain thinning.The carbide of vanadium, boride hardness in metal carbides, boride is the highest, and is bigger to the raising effect of alloy anti-wear performance.

Rare earth plays the inovulant effect at the hardfacing alloy crystallization process, can improve the crystallization and the distribution of hard phase, thereby improves the combination property of deposited metal indirectly.

The cutting edge position of comb-tooth-type grinder hammerhead parent of the present invention is provided with some wedge-shaped slots; Be covered with the deposited metal of forming by described transition zone and surface wear-resistant layer through overlaying method in the wedge-shaped slot; Counter blade oral area position is carried out wedge shape and is strengthened, and wherein transition region thickness is 2-4mm, and the remaining space of wedge-shaped slot is filled by surface wear-resistant layer; Constitute appearance even curface wearing layer, the surface abrasion resistance layer thickness is 3-8mm.Cutting edge position wedge shape overlay cladding can improve the whole wear-resistant ability of broach.At first, wedge shape object anti-pressure ability is strong, can be by powerful operating pressure institute conquassation.Secondly, the wedge shape overlay cladding is a support with parent around it, and parent plays clamping and protective effect to overlay cladding; And the existence of wedge shape overlay cladding is equivalent to construct wear-resistant skeleton barrier in advance on the parent surface, is not worn with macroscopical shadow effect protection parent conversely.

Transition region thickness according to the invention is 2-4mm, and the surface abrasion resistance layer thickness is 3-8mm.

Below in conjunction with embodiment and accompanying drawing the present invention is done further description.

Embodiment 1: a kind of comb-tooth-type grinder hammerhead, process the bimetal wear resistant parts through technique for overlaying.Fig. 1 is the assembling sketch map of this comb-tooth-type grinder hammerhead.Fig. 2 is that the A-A of tup among Fig. 1 is to schematic cross-section.Fig. 3 is that the B-B of tup among Fig. 1 is to schematic cross-section.

This comb-tooth-type grinder hammerhead parent 1 adopts cast alloy steel, and concrete component content is: C 0.25~0.42%, Cr 0.6~6%, Si 0.8~1.8%, Mn 0.5~2.8%, Nb 0.3~1.2, surplus is Fe.Get final heat treatment hardness HRC28~38.This precursor alloy can be resisted because of loading suddenly the significant shear power that bear at the impulsive force that causes and tooth root position.Parent surface integral coating has deposited metal 2; Deposited metal 2 is combined by transition zone and surface wear-resistant layer two parts; The constituent of said transition zone alloy material and mass content are: C 0.2~0.5%, Cr 10~15%, Mn 10~22%, Ni 0.5~5.0%; V 0.2~1.0%, Mo 0.3~1.2%, surplus is Fe; Transition zone deposited metal tissue is the main body mutually with austenite, postwelding air cooling hardness HRC22~35.The constituent of said surface wear-resistant layer alloy material and mass content are: C 1.8~3.0%, Cr 15~22%, Si 0.3~1.0%, Mn 1.0~2.2%, Ni 1.5~3.0%, V 0.5~2.0%, Mo 0.5~2.4%, B 1.9~3.8 %, rare earth yttrium 0.02~0.10%, surplus is Fe.Postwelding air cooling hardness HRC58~64.

Transition region thickness according to the invention is 2-4mm, and the surface abrasion resistance layer thickness is 3-8mm.

Can find out that from Fig. 2, Fig. 3 the cutting edge position of comb-tooth-type grinder hammerhead parent 1 of the present invention is provided with some wedge-shaped slots 3, reserve wedge-shaped slot 3 according to crown shaped design casting parent and at the cutting edge position.Described cutting edge position is that crown is met charge level and crown top.Be covered with the deposited metal of forming by described transition zone and surface wear-resistant layer 2 through overlaying method in the wedge-shaped slot 3; Counter blade oral area position is carried out wedge shape and is strengthened; Wherein transition region thickness is 2-4mm; Wedge-shaped slot 3 remaining spaces are filled by surface wear-resistant layer, constitute appearance even curface wearing layer, and the surface abrasion resistance layer thickness is 3-8mm.

Can reach 4-6 month the service life of this comb-tooth-type grinder hammerhead tup.

Embodiment 2: a kind of comb-tooth-type grinder hammerhead, process the bimetal wear resistant parts through technique for overlaying.Fig. 4 is the assembling sketch map of this comb-tooth-type grinder hammerhead.Fig. 5 is the schematic cross-section of tup among Fig. 4.

This comb-tooth-type grinder hammerhead parent 1 adopts cast alloy steel, and concrete component content is: C 0.25~0.42%, Cr 0.6~6%, Si 0.8~1.8%, Mn 0.5~2.8%, Nb 0.3~1.2, surplus is Fe.Get final heat treatment hardness HRC28~38.This precursor alloy can be resisted because of loading suddenly the significant shear power that bear at the impulsive force that causes and tooth root position.Parent surface integral coating has deposited metal 2; Deposited metal 2 is combined by transition zone and surface wear-resistant layer two parts; The constituent of said transition zone alloy material and mass content are: C 0.1~0.5%, Cr 14~20%, Mn 12~20%, Ni 2.5~9.0%; V 0.5~1.2%, Mo 0.7~1.5%, surplus is Fe; Transition zone deposited metal tissue is the main body mutually with austenite, postwelding air cooling hardness HRC22~35.The constituent of said surface wear-resistant layer alloy material and mass content are: C 1.5~3.5%, Cr 15~22%, Si 0.5~1.5%, Mn 1.6~3.2%, Ni 0.4~2.0%, V 0.7~2.5%, Mo 1.5~3.4%, B 0.9~2.8 %, rare earth yttrium 0.05~0.12%, surplus is Fe.Postwelding air cooling hardness HRC58~64.

Transition region thickness according to the invention is 2-4mm, and the surface abrasion resistance layer thickness is 3-8mm.

As can be seen from Figure 5, the cutting edge position of comb-tooth-type grinder hammerhead parent 1 of the present invention is provided with some wedge-shaped slots 3, reserves wedge-shaped slot 3 according to crown shaped design casting parent and at the cutting edge position.Described cutting edge position is the crown top.Be covered with the deposited metal of forming by described transition zone and surface wear-resistant layer 2 through overlaying method in the wedge-shaped slot 3; Counter blade oral area position is carried out wedge shape and is strengthened; Wherein transition region thickness is 2-4mm; Wedge-shaped slot 3 remaining spaces are filled by surface wear-resistant layer, constitute appearance even curface wearing layer, and the surface abrasion resistance layer thickness is 3-8mm.Be 4-6 month the service life of this tup.

Claims (3)

1. comb-tooth-type grinder hammerhead; It is characterized in that: its parent adopts cast alloy steel; Parent surface integral coating has deposited metal, and deposited metal is combined by transition zone and surface wear-resistant layer two parts, and the constituent of said transition zone alloy material and mass content are: C 0.1~0.6%, Cr 10~25%, Mn 5~22%, Ni 0.5~9.0%; V 0.2~1.2%, Mo 0.3~1.5%, surplus is Fe; The constituent of said surface wear-resistant layer alloy material and mass content are: C 1.2~3.5%, Cr 11~32%, Si 0.3~1.5%, Mn 0.6~3.2%, Ni 0.4~6.0%, V 0.5~2.5%, Mo 0.5~3.4%, B 0.9~3.8 %, rare earth yttrium 0.02~0.12%, surplus is Fe.
2. comb-tooth-type grinder hammerhead according to claim 1; It is characterized in that: the cutting edge position of said parent is provided with some wedge-shaped slots; Be covered with the deposited metal of forming by described transition zone and surface wear-resistant layer through overlaying method in the wedge-shaped slot; Wherein transition region thickness is 2-4mm, and the remaining space of wedge-shaped slot is filled by surface wear-resistant layer, constitutes appearance even curface wearing layer.
3. comb-tooth-type grinder hammerhead according to claim 1 is characterized in that: said transition region thickness is 2-4mm, and the surface abrasion resistance layer thickness is 3-8mm.
CN2011103973023A 2011-12-05 2011-12-05 Comb-tooth-type crusher hammer CN102489360A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104209163A (en) * 2014-09-06 2014-12-17 北京工业大学 Wear resistant composite hammerhead and preparation method thereof
CN104858013A (en) * 2015-05-29 2015-08-26 四川鸿舰重型机械制造有限责任公司 Composite roll skin of four-roll crusher and preparation process for composite roll skin
CN105233925A (en) * 2015-10-27 2016-01-13 张荣斌 Plate hammer of impact crusher
CN107345287A (en) * 2016-05-05 2017-11-14 黄毅 A kind of base steel ceramic-metal composite and preparation method thereof
CN108067716A (en) * 2017-11-20 2018-05-25 湖南红宇耐磨新材料股份有限公司 It is a kind of to roll the method for spray-welding for scooping wall and/or crushing wall applied to gyratory crusher

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CN201921720U (en) * 2010-11-04 2011-08-10 贾春生 Composite abrasion-resistant surfacing hammerhead

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104209163A (en) * 2014-09-06 2014-12-17 北京工业大学 Wear resistant composite hammerhead and preparation method thereof
CN104858013A (en) * 2015-05-29 2015-08-26 四川鸿舰重型机械制造有限责任公司 Composite roll skin of four-roll crusher and preparation process for composite roll skin
CN104858013B (en) * 2015-05-29 2017-10-03 四川鸿舰重型机械制造有限责任公司 Four-roller crusher composite roll skin and its manufacture craft
CN105233925A (en) * 2015-10-27 2016-01-13 张荣斌 Plate hammer of impact crusher
CN105233925B (en) * 2015-10-27 2018-03-27 贵州东峰锑业股份有限公司 Board hammer of impact crusher
CN107345287A (en) * 2016-05-05 2017-11-14 黄毅 A kind of base steel ceramic-metal composite and preparation method thereof
CN108067716A (en) * 2017-11-20 2018-05-25 湖南红宇耐磨新材料股份有限公司 It is a kind of to roll the method for spray-welding for scooping wall and/or crushing wall applied to gyratory crusher

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