CN1142046C - Tappet of iron-base surface composite material and its manufacture - Google Patents
Tappet of iron-base surface composite material and its manufacture Download PDFInfo
- Publication number
- CN1142046C CN1142046C CNB001131869A CN00113186A CN1142046C CN 1142046 C CN1142046 C CN 1142046C CN B001131869 A CNB001131869 A CN B001131869A CN 00113186 A CN00113186 A CN 00113186A CN 1142046 C CN1142046 C CN 1142046C
- Authority
- CN
- China
- Prior art keywords
- tappet
- iron
- base surface
- composite material
- pressed compact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The present invention provides a tappet with an iron-base surface composite material layer. The tappet body of the tappet is made of high-strength gray cast iron or nodular cast iron; an iron-base composite material layer of a bottom working surface is composed of carbide or oxide ceramic reinforcing phases uniformly distributed on an iron-base body; a diffusion transition layer formed in a casting and sintering process is arranged between the tappet body and the iron-base composite material layer. A manufacture method of the tappet comprises the steps that a corresponding powder material is prepared into a pressed blank which is presintered and fixed onto a mold face, or the powder material is directly coated on the mold face; then, high-temperature iron melt is poured, and the tappet is obtained by sintering and cooling. The tappet has the advantages of high abrasion resistance, good comprehensive performance, few manufacture procedures, short period and low cost.
Description
Technical field
The invention belongs to article made from metal based composite material and manufacturing technology field thereof, is that a kind of Fe-base surface compound material that has with the ceramic particle enhancing is the tappet and the manufacture method thereof of working face.
Background technology
Tappet is the vital part of engine breathing mechanism, raising along with high speed engine rotating speed and pressure, require its should have can be under high pressure, high speed and sharp wear operating mode the characteristic of operate as normal, but but existing quench hardening type tappet and chilled iron tappet all can not meet the demands.They or lack the hard wild phase, or the hard wild phase hardness that has not high (only for HV800), and poor morphology, be easy to generate and peel off and spot corrosion, so these two kinds of tappets are easily excessive wear all, thereby make not exclusively emergent power decline of engine combustion, oil consumption increase and increasing environmental pollution.
Summary of the invention
One of purpose of the present invention is exactly to overcome the defective that existing tappet exists, and provides a kind of working face to have the tappet of Fe-base surface compound material sinter layer structure.
Make this method with tappet of Fe-base surface compound material sinter layer structure at present, having only the inventor is disclosed in 99114851.7 " casting-sinter process of preparation iron base composite material " at application number.The processing step of this method has: make casting mold, make pressed compact, pressed compact is fixed, melting molten iron, cast and sintering.If produce the tappet of iron-base surface composite material that contains more fusible component in the pressed compact according to the processing step and the condition of this method fully, be feasible, but because tappet is a thin-section casting, its thickest is also less than 12mm, thereby during casting and pouring, the heat that molten iron can provide is few, when containing more infusibility component in coat or the pressed compact, the sintering densification of tappet bottom working face just is difficult to finish in casting process, casting skin, grey point can occur, fall defective such as slag.If adopt disclosed additional sintering measure in 99114851.7, its energy consumption is big, and the execution cycle is long.This method used binding agent when making pressed compact is a water based adhesive in addition, and wherein contained water evaporates is slower, even through long-time baking, also is difficult for removing fully, can form hole in pressed compact, causes defective.
Thereby two of purpose of the present invention is to solve the problem that prior art exists, and provide a kind of can the assurance to finish the pressed compact sintering densification in casting process, and energy consumption is low again, the method that the cycle is short.
Three of purpose of the present invention provides a kind of can the solution because of using the method for the problem that water based adhesive brought.
One of purpose of the present invention is to be reached by a kind of like this technical solution: the working surface of tappet that this technical solution is showed bottom is the Fe-base surface compound material layer, should have high-wearing feature and better heat-resisting, corrosion resistance so that working surface to be provided at the bottom of the tappet all; The tappet shaft is spheroidal graphite cast-iron or casting pig, with intensity, plasticity and the toughness that provides shaft to have; Because the Fe-base surface compound material layer forms by cast-sintering, thus between shaft and Fe-base surface compound material layer, also have the diffusion transition layer, so that firm metallurgical binding to be provided.
Wherein, the Fe-base surface compound material layer serve as reasons on the martensite of iron or martensite+austenite or pearlite matrix evenly distribution WC, VC, TiC, (Cr, Fe)
7C
3, (Cr, Fe)
23C
6Deng carbide ceramics or Al
2O
3, ZrO
2Combine Deng one or both or two or more ceramic enhancement phase in the oxide ceramics, THICKNESS CONTROL is 1～4mm.This material layer is to utilize the heat of molten iron to make coat or the pressed compact generation sintering densification that is positioned on the tappet mo(U)ld face in manufacture process, and finally the end face in the tappet bottom generates.
The diffusion transition layer is served as reasons, and the even carbide that distributes netted chromium constitutes on the martensite of iron or martensite+austenite or pearlite matrix, and thickness is 0.5～1.5mm.
Two of purpose of the present invention is by on the basis of existing methods processing step, and the technical solution of increase by one step presintering treatment process reaches, and promptly after pressed compact is made, handles being fixed on the mo(U)ld face more earlier through presintering.Pre-sintering temperature is 500～1400 ℃, and is incubated 10～120 minutes under this temperature.
Three of purpose of the present invention is by adopting the higher a kind of like this technical scheme of binding agent of solvent evaporates degree to reach.Be that binding agent used when making pressed compact adopts the alcohol radical organic binder bond specifically, its addition is 2～7%.Because wherein contained alcohols solvent is volatile, and igniting gets final product burning-off, so eliminated the disadvantage of employing water based adhesive fully.Moreover, for organic binder bond, also can make it decompose carbonization fully if pressed compact has carried out presintering, this is very favorable for being avoided pore.
For flowability and the lubricity that improves powder, prevent defectives such as the pressed compact generation is defeated and dispersed, crackle, layering, improve compact strength, when making pressed compact, also can add 0.1～1.5% forming agent.This forming agent can be selected one or both in zinc stearate, polyethylene glycol, buna, the paraffin for use.
In addition, because the present invention has adopted pre-sintering process, make pressed compact in casting process, finish sintering densification easily, therefore the pouring temperature of molten iron can be selected the temperature range lower than prior art, promptly 1400～1550 ℃, this reduces the molten iron oxidation scaling loss to cutting down the consumption of energy, and improves lining durability and all is beneficial to.
Compared with the prior art the present invention has the following advantages:
1. the tappet with Fe-base surface compound material layer provided by the invention, because its working surface contains a large amount of high-hardness ceramic wild phases (hardness HV1800～3000), and its form is also fine, therefore this tappet had both had high-wearing feature, the hear resistance of ceramic material, the high strength and the high tenacity that have kept ferrous materials again, hard interior tough outside can accomplishing, very excellent comprehensive performances is arranged, can bear higher load and harsher working environment, the particularly suitable modern high-speed engines.
2. because manufacture method provided by the invention has increased the presintering operation, not only can guarantee that the pressed compact that contains more infusibility component finishes sintering densification in casting process, eliminate casting skin, ash point fully and fallen defective such as slag, and the alcohols solvent in the alcohol radical organic binder bond that the inventive method adopted when making pressed compact is removed rapidly, organic binder bond decomposes carbonization fully, has avoided air holes.
3. because the present invention has substituted the water based adhesive of former usefulness with the alcohol radical organic binder bond, so the solvent in the binding agent is easy to remove, the time of removing lacks, no energy consumption, and can not cause hole in the sinter layer again.
4. because the present invention also proposes to add forming agent, so can also improve the flowability and the lubricity of powder, prevent that pressed compact generation is defeated and dispersed, defectives such as crackle or layering, guaranteed the quality of iron base composite material sinter layer.
5. because pouring temperature of the present invention can reduce greatly, not only reduce energy consumption, reduced the molten iron oxidation scaling loss, but also the life-span of having improved furnace lining.
Description of drawings
Fig. 1 is the main TV structure schematic diagram of tubular tappet of iron-base surface composite material;
Fig. 2 is the main TV structure schematic diagram of T shape tappet of iron-base surface composite material.
The specific embodiment
Provide the embodiment of tappet of the present invention and the embodiment of manufacturing tappet method below in conjunction with accompanying drawing, and it is described in detail.
Embodiment 1:
As shown in Figure 1, the tappet of present embodiment is to be made of shaft 1 and bottom working surface 2, tappet shaft 1 is the cylindrical shape of end sealing, the working surface of bottom is positioned at the outer face of shaft 1 blind end, be Fe-base surface compound material layer 2, be by on the martensite of iron or martensite+austenite or pearlite matrix evenly distribution WC, VC, TiC, (Cr, Fe)
7C
3, (Cr, Fe)
23C
6Deng carbide ceramics or Al
2O
3, ZrO
2Constitute Deng one or both or two or more ceramic enhancement phase in the oxide ceramics, thickness is 1～4mm.Tappet shaft 1 is made for spheroidal graphite cast-iron or casting pig.Because Fe-base surface compound material layer 2 forms through cast-sintering, so also be formed with diffusion transition layer 3 between tappet shaft 1 and Fe-base surface compound material 2.This diffusion transition layer 3 is served as reasons, and the even carbide that distributes netted chromium constitutes on the martensite of iron or martensite+austenite or pearlite matrix, and thickness is 0.5～1.5mm.
Embodiment 2:
As shown in Figure 2, the tappet of present embodiment also is to be made of shaft 1 and bottom working surface 2.Tappet shaft 1 is T-shaped, and bottom working surface 2 is positioned at the outer face of the T shape end of shaft 1.Material, the thickness of this working surface 2, tappet shaft 1 and the diffusion transition layer 3 between the two are identical with embodiment 1, slightly.
(1) makes casting mold is made tappet according to a conventional method with precoated sand, self-hardening resin sand or tide mould sand casting mold.
(2) make the combination matching that pressed compact press the listed embodiment 2～7 of table 1, the various powders of granularity≤50 μ m are placed ball mill together, and the absolute ethyl alcohol of adding powder gross weight 8～20%; Wet mixing 8～48 hours, 60～200 rev/mins of rotating speeds.
Wherein the proportioning correspondence of each composition of the added fusible alloy powder of each embodiment sees table 2.
The powder of mixing is taken out oven dry, add the alcohol radical organic binder bond of powder gross weight 2～7%, behind the mixing, pack metal die on hydraulic press, be pressed into the pressed compact that thickness is 1～4mm with the unit pressure of 100～1000MPa.Also can in powder, add 0.1～1.5% forming agent in addition.Forming agent can be one or both in zinc stearate, polyethylene glycol, buna, the paraffin.
(3) presintering is handled pressed compact is carried out the presintering processing in vacuum sintering furnace, and temperature and temperature retention time that each embodiment presintering is handled are respectively:
3 1300 ℃ of embodiment 20～60 minutes
4 1400 ℃ of embodiment 10～60 minutes
5 600 ℃ of embodiment 40～80 minutes
6 800 ℃ of embodiment 30～70 minutes
7 700 ℃ of embodiment 40～80 minutes
8 500 ℃ of embodiment 50～120 minutes
(4) pressed compact fixing with cooled pressed compact with binding agent or fixation with steel wire at mo(U)ld face.If fix with binding agent, binding agent can be any in 502 glue, the PVA aqueous solution, the waterglass etc.
(5) the melting molten iron is corresponding furnace charge melting molten iron according to a conventional method in electric induction furnace, and handles accordingly.
(6) cast and sintering pour into casting mold with high temperature liquid iron, and pouring temperature is 1400～1550 ℃, and utilizes the molten iron heat to finish the sintering densification of pressed compact, to form the Fe-base surface compound material layer on the tappet end face.
Embodiment 9～10:
The composition of present embodiment making pressed compact is pressed the set of dispense ratio of table 1 and 2 listed embodiment 9～10, and manufacturing process is the same except that the presintering treatment process, slightly.The pressed compact of different is present embodiment is all handled without presintering, but the alcohol-based solvent in the burning-off pressed compact that all needs to light a fire.
Embodiment 11:
The manufacturing process of present embodiment except that do not have to make pressed compact, presintering is handled or do not handle, the fixedly operation of pressed compact, all the other are the same, slightly.Present embodiment is made the powder formulation of pressed compact with embodiment 9, and adds the alcohol radical organic binder bond furnishing paste that accounts for powder gross weight 6～8% in powder, directly is coated in the respective surfaces of casting mold, and the alcohol-based solvent in the burning-off coat of lighting a fire then gets final product.
The present invention is not limited to above embodiment.
Table 1
Table 2
Claims (9)
1. tappet of iron-base surface composite material, it is characterized in that tappet shaft (1) is spheroidal graphite cast-iron or casting pig, the working surface of tappet (1) bottom is Fe-base surface compound material layer (2), and also has diffusion transition layer (3) between tappet shaft (1) and Fe-base surface compound material layer (2).
2. tappet of iron-base surface composite material according to claim 1, the thickness that it is characterized in that tappet Fe-base surface compound material layer (2) is 1～4mm, the thickness of diffusion transition layer (3) is 0.5～1.5mm.
3. tappet of iron-base surface composite material according to claim 1 and 2, it is characterized in that tappet (1) Fe-base surface compound material layer (2) serve as reasons on the martensite of iron or martensite+austenite or pearlite matrix evenly distribution WC, VC, TiC, (Cr, Fe)
7C
3, (Cr, Fe)
23C
6Deng carbide ceramics or Al
2O
3, ZrO
2Constitute Deng one or both or two or more ceramic enhancement phase in the oxide ceramics.
4. tappet of iron-base surface composite material according to claim 1 and 2 is characterized in that serve as reasons evenly the distribute carbide of netted chromium of diffusion transition layer (3) in the tappet (1) constitutes on the martensite of iron or martensite+austenite or pearlite matrix.
5. method of making tappet of iron-base surface composite material, its processing step has: make casting mold, make pressed compact, pressed compact is fixed, melting molten iron, cast and sintering, after it is characterized in that pressed compact is made, need to handle through presintering earlier to be fixed on the casting mold again, pre-sintering temperature is 500～1400 ℃, and is incubated 10～120 minutes under this temperature.
6. the method for manufacturing tappet of iron-base surface composite material according to claim 5 is characterized in that used binding agent is the alcohol radical organic binder bond when making pressed compact, and its addition is 2～7%.
7. according to the method for claim 5 or 6 described manufacturing tappet of iron-base surface composite material, also added 0.1～1.5% forming agent when it is characterized in that making pressed compact.
8. the method for manufacturing tappet of iron-base surface composite material according to claim 7 is characterized in that used forming agent is one or both in zinc stearate, polyethylene glycol, buna, the paraffin.
9. according to the method for claim 5 or 6 or 8 described manufacturing tappet of iron-base surface composite material, it is characterized in that pouring temperature is 1400～1550 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001131869A CN1142046C (en) | 2000-09-14 | 2000-09-14 | Tappet of iron-base surface composite material and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001131869A CN1142046C (en) | 2000-09-14 | 2000-09-14 | Tappet of iron-base surface composite material and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1297798A CN1297798A (en) | 2001-06-06 |
| CN1142046C true CN1142046C (en) | 2004-03-17 |
Family
ID=4582995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001131869A Expired - Fee Related CN1142046C (en) | 2000-09-14 | 2000-09-14 | Tappet of iron-base surface composite material and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1142046C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384609C (en) * | 2002-11-05 | 2008-04-30 | 鲍志勇 | Casting infiltration method of heating power for preparing composite alloy material with metal base |
| CN104525916B (en) * | 2014-11-18 | 2017-02-22 | 西安理工大学 | Engine tappet and manufacturing method thereof |
-
2000
- 2000-09-14 CN CNB001131869A patent/CN1142046C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1297798A (en) | 2001-06-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1108211C (en) | Cam shaft of iron-base surface composite material and its manufacture | |
| JP2003268414A (en) | Sintered alloy for valve seat, valve seat and its manufacturing method | |
| CN110105074A (en) | A kind of blowhole inlays magnesium carbonaceous ladle slide gate brick of zirconium plate and preparation method thereof | |
| US3930875A (en) | Pump member for molten metal | |
| CN109139755A (en) | A kind of preparation method of the copper-based composite friction material of iron | |
| CN1026338C (en) | Capsule-shaped (round) grinding ball consisting of high tenacity, high-chromium complex alloyed cast iron and mfg. method thereof | |
| CN1142046C (en) | Tappet of iron-base surface composite material and its manufacture | |
| CN111074109B (en) | Biphase ceramic particle reinforced aluminum-based composite material, brake drum and preparation method thereof | |
| Kannan et al. | Development and tribological characterization of fly ash reinforced iron based functionally gradient friction materials | |
| WO2020090725A1 (en) | Sintered friction material and method for producing sintered friction material | |
| KR102205475B1 (en) | Thin layer tappet including WC-Ni based hard metals and manufacturing thereof | |
| CN1056929A (en) | Combined metal-porcelain crucible and preparation method thereof | |
| CN112996878B (en) | Sintered friction material and method for producing sintered friction material | |
| CN109487124B (en) | Aluminum-based wear-resistant material under sulfur-containing corrosion working condition and preparation method thereof | |
| CN2439919Y (en) | Tappet arm of composite material with iron-substrate surface | |
| CN1680624A (en) | Wearproof parts of oil mill and their manufacture | |
| CN2441975Y (en) | Iron base surface composite material cam shaft | |
| JPH11336899A (en) | Piston made of alloy of al-si series capable of being installed to top ring groove in upper position | |
| JP6309700B1 (en) | Sintered valve seat | |
| CN117004872A (en) | Preparation method of novel isothermal quenching vermicular cast iron with high strength and toughness and high wear resistance | |
| CN2591231Y (en) | Powder metallurgical composite material engine air valve guide cylinder | |
| JPS62133043A (en) | Fe sintered material impregnated with cu | |
| JP3346270B2 (en) | Piston ring wear ring made of free graphite precipitated iron-based sintered material with excellent high temperature wear resistance | |
| JP4232080B2 (en) | Sliding member and manufacturing method thereof | |
| JP2001032747A (en) | Aluminum alloy piston for internal combustion engine with its piston ring groove reinforced with porous austenitic type stainless steel and manufacture thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| AR01 | Abandonment of patent right to avoid double patenting |
According to article 9 of the patent law and article 13 of the detailed rules for the implementation of the patent law: 113186.9 of the invention patents in this issue as a notice of authorization, and at the same time corresponding to the 24443.7 utility model patent to be given up, and in the 20 volume of the 11 issue of the new type of communique on the patent right to abandon the announcement. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |