CN1043455A - Coating hammer leaf and preparation and be used to make the saggar of coating hammer leaf - Google Patents
Coating hammer leaf and preparation and be used to make the saggar of coating hammer leaf Download PDFInfo
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- CN1043455A CN1043455A CN 89106981 CN89106981A CN1043455A CN 1043455 A CN1043455 A CN 1043455A CN 89106981 CN89106981 CN 89106981 CN 89106981 A CN89106981 A CN 89106981A CN 1043455 A CN1043455 A CN 1043455A
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Abstract
The invention relates to pulverizer high abrasion hammer leaf and manufacture method.It is characterized in that at hammer leaf work head by the compound one deck high-wear-resistant alloy of surface metallurgic clinkering coating process clinkering coating, hammer leaf behind fused slurry coating has the weight uniformity, hardness is high and even, HRC can reach about 70, practical effect obviously is better than the built-up welding hammer leaf, improve the service life of hammer leaf greatly, saved great deal of steel, reduced the applying unit production cost.Melting coating process is simple, and is reliable and stable, is suitable for producing in batches, and it is few that it consumes the alloy amount, fuse quality and be easy to control, can not produce coating " dilution " phenomenon, the yield rate height, both be suitable for the preparation of new hammer leaf, can be used for the reparation of old hammer leaf again, had very high technical economic benefit.
Description
The invention relates to beater disintegrating machine high abrasion hammer leaf and manufacture method.
Hammer leaf because of and existed impact wear and the particle friction wear that goes round and begins again between comminuted material, very easily wearing and tearing.Both at home and abroad to improving the wearability of hammer leaf, prolong monolithic service life, the method for generally taking has: adopt wear-resisting hard alloy steel monoblock cast; Element infiltration thermo-chemical treatment; The part applies high-abrasive material.
The wearing and tearing of hammer leaf mainly are at hammer leaf head working face, especially head two corner angle.Steel alloy manufacturing, chemosmosis heat treatment are to improve the hammer leaf wearability on the whole, and to apply wearing layer low in the part for technical economic benefit.It is built-up welding that part commonly used applies the wearing layer method, promptly applies welding certain thickness wearing layer (as the carbine abrasion-proof alloy) with overlaying method on hammer leaf head working face.
Built-up welding can improve the wearability of hammer leaf effectively, prolong monolithic service life, but it exists some defective to a certain extent.Mode of heating as built-up welding is the some heating of very limitation, molten bath of a molten bath crimping, and hard alloy particle distributed pole in welding filling metal is inhomogeneous, easily causes surfacing layer and hardness inhomogeneous; In the weld deposit process, hardfacing alloy and matrix steel surface all are in molten condition, and a large amount of elemental irons easily spread to overlay cladding from matrix, form the mutual melting zone of broad, cause overlay cladding by " dilution ", have reduced the original antiwear characteristic of overlay cladding alloy; It is many that built-up welding consumes the carbide alloy amount, and be prone to fire check, pore in weld deposit process, welding such as be mingled with and lack latently, and yield rate is low, makes the product cost height; The built-up welding amount is wayward, easily cause built-up welding after hammer leaf weight differ, influence dynamic balancing.Above-mentioned defective is more difficult to get control and eliminates in actual production, operating process, directly influenced the technical economic benefit of built-up welding.
The objective of the invention is to overcome above-mentioned defective, a kind of high abrasion, low cost are provided, the composite coating hammer leaf of technological performance.
Another object of the present invention is to provide a kind of manufacturing simple and easy to do, quality is easy to control, has higher technical economic benefit, be suitable for the method for practical manufacturing wear-resistant coating hammer leaf, and be suitable for conveniently producing in batches, help stable improving the quality of products, guarantee the special-purpose sintering saggar of this coating hammer leaf of manufacturing of coating weight unanimity.
Anti-abrasive hammer sheet of the present invention is characterized in that fusing (knot) layer of surface hardened artiwear alloy coat at hammer leaf matrix work head.Specifically, promptly at two work heads of hammer leaf 1, with surface metallurgic clinkering coating process, the compound layer of surface hardened artiwear of clinkering alloy coat 2, this hardened artiwear alloy coat are a kind of from molten high hardness alloy powder.For improve wearability and with the metallurgical binding fastness of matrix, it can be two kinds or above alloyed powder is composite forms.This compound alloyed powder can be the cladded type self-fluxing powder that contains tungsten carbide (WC), the alloyed powder parent can be that toughness and hardness are all better, can form the molten certainly type alloyed powder of firm metallurgical binding with matrix, as nickel (Ni) base, (Co) base, iron (Fe) base or its combination.Adamant such as tungsten carbide (WC) particulate even dispersion is coated by the parent fine-particle powder in parent, constitutes the heterogeneous hard coating material that all mixes, and its granularity can be 140～320 orders.Look by comminuted material hardness, adamant tungsten carbide particulate content (weight) in the composite alloy powder is preferably 25%-45%, and wherein especially with tungsten carbide content 35%-40% optimum, all the other are the precursor alloy powder.Table 1 is several common coatings alloyed powder parent prescriptions and chemical composition, and table 2 is basic composite wear-resisting alloy coating formula commonly used.
Table 1 common coatings alloyed powder parent prescription and chemical composition
| The trade mark | Chemical composition (weight %) | |||||||
| C | Cr | B | Si | Ni | Fe | Co | Mo | |
| Ni 60 | 0.8－1.0 | 14－18 | 3.5－4.5 | 3.5－4.5 | Surplus | ≤14 | ||
| Co 50 | 0.3-0.7 | 18-20 | 2.0-3.5 | 3.5-4.0 | 26-30 | ≤12 | Surplus | 4.0-6.0 |
| Fe 65 | 4.0-5.0 | 35-50 | 2.5-3.0 | 2.0-3.0 | Surplus | |||
Table 2 is used basic composite wear-resisting alloy coating formula (weight %) always
| The coating trade mark | WC% | Parent % |
| Ni 60+WC | 25-45 | Ni 6075-55 |
| Co 50+WC | 25-45 | Co 5075-55 |
| Fe 65+WC | 25-45 | Fe 6575-55 |
For prolonging monolithic service life, improve practical effect, reduce the coating consumption, hammer leaf matrix work head can be processed into blunt round or approximate blunt round (as rectangle hammer leaf head two clavicorns are cut), so both can effectively increase the wearing layer thickness at place easy to wear, improve service life, can save the alloyed powder consumption again, reduce production costs, processing (compound) back hammer leaf good looking appearance.
The preparation of aforesaid coating hammer leaf is that the back is flat is horizontally-arranged in the special-purpose sintering saggar through Local treatment (as cleaning decontamination, deoxidation layer) with hammer leaf to be coated with (typing), again with a certain amount of antifriction alloy powder spreading in hammer leaf two heads of working.The spreading alloyed powder can be a dry powder, also can be to be mixed into pasty state by adhesive (rosin as 35% and 65% turpentine oil), after (oven dry) repaiies type, lies against the fused slurry coating fritting in the stove.Hammer leaf head spreading alloyed powder melted by heating is soaked into matrix and molten mutually with the matrix diffusion, can both be kept original coating alloy performance after the cooling, forms the alloy coat of firm metallurgical binding again with matrix.
For improving the clinkering quality, obtain the high-quality coating of dense non-porous and firm metallurgical binding, avoid particularly excessive diffusion " dilution " coating of ferro element of interface element, must strict control fuse technology.Fuse to be preferably under protective atmosphere or the negative pressure (is 6.666-1.333Pa as vacuum) and carry out; fusing sintering temperature is looked the composite alloy powder, liquid phase occurs with coating alloy and is advisable, and makes coating alloy infiltrated with molten metal matrix; form liquid-solid diffusion, obtain having the firm metallurgical binding in narrow mutual melting zone.It is as follows specifically to fuse technological parameter:
Vacuum 6.666-1.333pa
Fusing sintering temperature 1050-1280 ℃
The type of cooling is cooled off with stove
Fuse process floating coat alloy homogeneous immersion matrix for making, the molten alloy cross flow is piled up, guarantee the uniformity and the hammer leaf weight consistency of clinkering coating, adapt to and produce in batches, reduce the product cost raising and fuse yield rate, the spreading hammer leaf should be placed on special use and fuse clinkering in the saggar.Fuse saggar and be a rectangle that coincide with hammer leaf and hold body, its periphery height is greater than hammer leaf height (as being twice in the hammer leaf height), and it both can stop conformal to fused coating, and it is irregular that its cross flow is piled up, and but lamination is put burning again, makes full use of the calcining kiln dischargeable capacity.Can on the periphery of the major axis both sides that fuse saggar 3, have some grooves 4, constitute thermal trough, make each folded hammer leaf temperature of burning even.Fusing saggar can adopt high temperature resistant and not be melted the high-temperature material that coating alloy soaks into and make.This high-temperature material can be refractory ceramics, as Mullite porcelain, high-alumina ceramic, carborundum, boron nitride porcelain etc.) or can produce form compact and stable protective oxide layer, the difficult refractory metal that is soaked on the surface.(as ferrotianium, ferrochrome, aluminium-containing alloy steel etc.).
The coating hammer leaf is owing to adopt hardness and all higher composite coating alloyed powder of toughness, and clinkering hammer leaf hardness is high and evenly, wearability is good, and coating and matrix bond are firm.Because of the clinkering coating for adopting the controlled heat energy of enough concentrating, the instantaneous heating of high temperature, in very short time, make the coating alloy powder fusion of coated on matrix surface, soak into matrix, and that matrix remains is solid-state, therefore do not have " dilution " phenomenon, can keep the original high hard antiwear characteristic of surperficial hardening agent preferably, hardness HRC on average can reach about 70.Clinkering hammer leaf unit are coating alloy consumption is little, and clinkering weight uniform defect is few, the yield rate height, overcome the defective that built-up welding produced effectively, the clinkering coating is not only applicable to the preparation of new hammer leaf, and is applicable to the reparation of old hammer leaf, has the technical economic benefit higher than built-up welding.
Figure one is a coating hammer leaf schematic diagram.
Figure two is for fusing a kind of structural representation of saggar.
The 1-hammer leaf; The 2-hardening alloy coating; 3-fuses saggar; The 4-thermal trough.
Embodiment:
With No. 45 steel or A
3Steel is processed into the typing hammer leaf (also can be the old hammer leaf of wearing and tearing) of 150 * 50 * 5mm and two ends corner cut, derust (oxide), decontamination, behind the cleaning-drying, respectively with composite alloy powder 25g, with 35% rosin, the composite adhesive furnishing of 65% turpentine oil pasty state, spreading is in hammer leaf two head working faces, and after drying was repaiied type, lying against volume size was high blunt (＞97%) AL of 152 * 52 * 10mm
2O
3In the pottery saggar, have some thermal troughs on the saggar, be stacked in the fused slurry coating stove and fuse, be warming up to temperature requiredly,, promptly get required coating hammer leaf with the stove cooling.
Table 3 embodiment coating formula and fuse parameter
| Rank | Coating formula (weight %) | Vacuum (Pa) | Fusing sintering temperature (℃) |
| 1 | 72Fe 65+28WC | 2.0 | 1230 |
| 2 | 65Co 50+35WC | 3.2 | 1180 |
| 3 | 60Ni 60+40WC | 1.5 | 1160 |
| 4 | 32.5Ni 60+32.5Co 50+35WC | 1.3 | 1170 |
Above-mentioned saggar can also be that other refractory ceramics or ferrotianium, ferrochrome etc. are not melted the refractory metal that coating alloy soaks into.
Claims (8)
1, a kind of pulverizer base steel hammer leaf is characterized in that the clinkering of hammer leaf head has surperficial hardened artiwear alloy coat.
2, by the described coating hammer leaf of claim 1, it is characterized in that surperficial hardened artiwear alloy coat is the compound self-fluxing powder of tungsten carbide type.
3, by the described coating hammer leaf of claim 2, it is characterized in that tungsten carbide content is 25%～45% in the composite alloy powder.
4, by the described coating hammer leaf of claim 3, it is characterized in that tungsten carbide content is 35%～40%.
5, by claim 1,2,3 or 4 described coating hammer leaves, it is characterized in that said hammer leaf matrix is blunt circle or approximate blunt round.
6, a kind of manufacture method that under vacuum or protective atmosphere, fuses base steel coating hammer leaf; it is characterized in that deposited flat the crouching in the sintering saggar of hammer leaf of head to melt the hardened artiwear alloyed powder certainly; keep flat then to be held in the calcining kiln and fuse; make coating alloy infiltrated with molten metal matrix, form firm metallurgical binding.
7, a kind of saggar that is used for the fused slurry coating hammer leaf is characterized in that saggar is the rectangle appearance body that coincide with hammer leaf, and its periphery is higher than the hammer leaf height, and saggar is by not being melted the high-temperature material making that alloy coat soaks into.
8,, it is characterized in that having on the saggar periphery some thermal troughs by the described saggar that fuses of claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89106981 CN1015609B (en) | 1989-06-02 | 1989-06-02 | Coated hammer sheet and its manufacture method and the box bowl for producing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89106981 CN1015609B (en) | 1989-06-02 | 1989-06-02 | Coated hammer sheet and its manufacture method and the box bowl for producing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1043455A true CN1043455A (en) | 1990-07-04 |
| CN1015609B CN1015609B (en) | 1992-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89106981 Expired CN1015609B (en) | 1989-06-02 | 1989-06-02 | Coated hammer sheet and its manufacture method and the box bowl for producing |
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| Country | Link |
|---|---|
| CN (1) | CN1015609B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102626780A (en) * | 2012-03-23 | 2012-08-08 | 中国科学院金属研究所 | Biomass fuel forming mold surface powder metallurgy strengthening coating material and process |
| CN110449592A (en) * | 2019-09-17 | 2019-11-15 | 江苏金秆农业装备有限公司 | A kind of preparation method of manganese-boron steel wearing layer |
| CN115786791A (en) * | 2022-12-22 | 2023-03-14 | 杨冠华 | New material mechanical breaking hammer sheet and preparation process thereof |
-
1989
- 1989-06-02 CN CN 89106981 patent/CN1015609B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102626780A (en) * | 2012-03-23 | 2012-08-08 | 中国科学院金属研究所 | Biomass fuel forming mold surface powder metallurgy strengthening coating material and process |
| CN110449592A (en) * | 2019-09-17 | 2019-11-15 | 江苏金秆农业装备有限公司 | A kind of preparation method of manganese-boron steel wearing layer |
| CN115786791A (en) * | 2022-12-22 | 2023-03-14 | 杨冠华 | New material mechanical breaking hammer sheet and preparation process thereof |
| CN115786791B (en) * | 2022-12-22 | 2024-02-13 | 杨冠华 | Mechanical crushing hammer and preparation process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1015609B (en) | 1992-02-26 |
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