CN113414393B - Processing technology of valve retainer - Google Patents
Processing technology of valve retainer Download PDFInfo
- Publication number
- CN113414393B CN113414393B CN202110723667.4A CN202110723667A CN113414393B CN 113414393 B CN113414393 B CN 113414393B CN 202110723667 A CN202110723667 A CN 202110723667A CN 113414393 B CN113414393 B CN 113414393B
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- namely
- powder
- valve seat
- copper
- sintering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/008—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of engine cylinder parts or of piston parts other than piston rings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F3/26—Impregnating
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/04—Diffusion into selected surface areas, e.g. using masks
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
- C23C10/30—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes using a layer of powder or paste on the surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a processing technology of a valve seat ring, which comprises the following steps: mixing, pressing, brushing, sintering, physical and chemical inspection, oil immersion, machining, grinding, packaging and warehousing after the inspection is qualified. Compared with the prior art, the method adopts a mode of brushing copper-infiltrated powder, which is also called local copper infiltration, does not need to press copper-infiltrated powder, and can infiltrate copper into the pores after the copper-infiltrated powder is blended with glue and stuck to the valve seat insert and sintered, so that appearance defects can be effectively prevented, the qualification rate of finished products is improved, the whole operation is simple, and the cost is not increased much.
Description
Technical Field
The invention relates to the technical field of engine part machining, in particular to a machining process and an assembly method of a valve seat ring.
Background
The valve retainer is arranged in the cylinder head of the engine and is used for sealing the valve and bearing high-speed impact, so that the requirements on appearance defects (such as sand holes, material shortage and the like) on the working surface are high, and the requirements are generally smaller than 0.3mm. In the prior art, the processing technology of the valve seat ring has two technologies, namely a non-copper-infiltration technology and a copper-infiltration technology. For the non-copper-penetrating process, the requirement is very high, and the non-copper-penetrating process is not compact metal, contains 10% of porosity, is easy to cause the exceeding of appearance defects due to the influence of cutters after the pores are communicated and during processing, and adopts the copper-penetrating process at present, but the process has higher cost and needs a machine for separately pressing special copper-penetrating sheets and patches.
Disclosure of Invention
The invention aims to provide a processing technology of a valve seat ring, which not only can improve the qualification rate of finished products, but also can not increase the cost higher.
The technical scheme adopted by the invention is as follows: a processing technology of a valve seat ring comprises the following steps:
s1: mixing, namely preparing metals including Fe, cr, mn, co, ni and V into powder and mixing the powder into powder raw materials;
s2: pressing, namely pressing the powder raw materials into a matrix layer, controlling the height of the matrix layer, pressing the wear-resistant layer, and finally demolding to form a blank;
s3: brushing powder, namely blending the copper-infiltrated powder with special glue and brushing the blended copper-infiltrated powder onto a plane with the bandwidth of the blank;
s4: sintering, namely sintering the brushed blank by using a sintering furnace;
s5: performing physical and chemical inspection, namely performing physical and chemical property inspection on the sintered product, judging whether the sintered product is qualified or not, and marking unqualified products;
s6: immersing in oil, immersing the qualified sintered product in oil,
s7: machining, namely finish turning the inner surface and the outer surface of the blank;
s8: grinding, namely grinding the outer circle and the end face of the blank;
s9: and packaging and warehousing after the inspection is qualified, inspecting the valve seat ring which is finished in the steps according to the design requirement, packaging and warehousing the qualified finished product, and independently marking the unqualified finished product.
As a preferred embodiment of the above-described method, the physical and chemical properties in the step S5 are hardness, crush value, chemical composition and metallographic examination.
Further preferably, the sintering process in the step S4 includes three stages of a pre-sintering stage, a high temperature stage and a cooling stage, and the tempering treatment is performed after sintering.
Further preferably, in the step S6, the qualified sintered product is immersed in engine oil.
Further preferably, in the sintering in step S4, the valve seat rings are stacked and sintered, and the number of stacked layers is 6.
The invention has the beneficial effects that: compared with the prior art, the method adopts a mode of brushing copper-infiltrated powder, which is also called local copper infiltration, does not need to press copper-infiltrated powder, only needs to blend the copper-infiltrated powder with glue and then brushes the copper-infiltrated powder onto the bandwidth of the valve seat ring and then sinters the copper-infiltrated powder, thereby effectively preventing appearance defects from occurring, further improving the qualification rate of finished products, and has simple whole operation and low cost.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
FIG. 2 is a graph comparing the physicochemical examination of the product produced by the present invention with that of the prior art.
FIG. 3 is a schematic diagram of valve seat bandwidth.
FIG. 4 is a test point of the valve seat belt width test in the abrasion test.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1, a processing technology of a valve seat ring mainly comprises the following steps:
step 1: mixing, namely preparing metals including Fe, cr, mn, co, ni and V into powder and mixing the powder into powder raw materials;
step 2: pressing, namely pressing the powder raw materials into a matrix layer, controlling the height of the matrix layer, pressing the wear-resistant layer, and finally demolding to form a blank;
step 3: brushing powder, namely blending the copper-infiltrated powder with special glue and brushing the blended copper-infiltrated powder onto a plane with the bandwidth of the blank;
step 4: sintering, namely sintering the brushed blank by a sintering furnace, wherein the whole sintering process comprises three stages of a presintering stage, a high temperature stage and a cooling stage, tempering treatment is carried out after sintering, the valve seat rings are stacked and sintered during sintering, the number of stacked layers is 6, and the single-layer 6-fold valve seat ring can be completed by stacking, so that the efficiency is improved, and the cost is saved;
step 5: performing physical and chemical inspection, namely performing physical and chemical property inspection on the sintered product, judging whether the sintered product is qualified or not, and marking unqualified products;
step 6: soaking oil, namely soaking the qualified sintered product in engine oil, wherein the engine oil is soaked in pores of the product in the soaking process, so that the corrosion resistance of the valve seat ring is increased, the wear resistance is improved, and the service life of the valve seat ring is prolonged;
step 7: machining, namely finish turning the inner surface and the outer surface of the blank;
step 8: grinding, namely grinding the outer circle and the end face of the blank;
step 9: and packaging and warehousing after the inspection is qualified, inspecting the valve seat ring which completes the steps according to the design requirement, packaging and warehousing the qualified finished product, and independently marking the unqualified finished product.
The physical and chemical inspection of the product (local copper infiltration), copper infiltration process (total copper infiltration) and copper non-infiltration process is carried out, the obtained results are shown in figure 2, and the chemical composition detection results are shown in the following table.
The results of the metallographic test after the local copper infiltration are shown in figure 2.
And carrying out wear resistance test on the qualified finished product and the conventional product, wherein the specific test process is as follows: measuring the bandwidth and angle of the valve rod matching surface, processing the inner chamfer bandwidth of the test seat ring according to the angle of the valve rod matching surface (the valve seat bandwidth is smaller than the valve rod matching bandwidth) as shown in fig. 3, measuring the inner chamfer bandwidth of the test seat ring (4 points are averaged and marked as shown in fig. 4), starting a wear test, retesting the bandwidth (4 points marked), and calculating the wear amount (the average value of the bandwidth before wear-the average value of the bandwidth after wear = the wear amount), wherein the final test structure is as follows:
through the wear resistance test, the product wear resistance of the manual viscose, namely the local copper infiltration product, is better than that of the conventional product, and the wear resistance is greatly improved.
Claims (3)
1. The processing technology of the valve seat ring is characterized by comprising the following steps of:
s1: mixing, namely preparing metals including Fe, cr, mn, co, ni and V into powder and mixing the powder into powder raw materials;
s2: pressing, namely pressing the powder raw materials into a matrix layer, controlling the height of the matrix layer, pressing the wear-resistant layer, and finally demolding to form a blank;
s3: brushing powder, namely blending the copper-infiltrated powder with glue and brushing the blended copper-infiltrated powder on a plane with the bandwidth of the blank;
s4: sintering, namely sintering the brushed blank by a sintering furnace, wherein the sintering process comprises three stages of a presintering stage, a high temperature stage and a cooling stage, and tempering is performed after sintering;
s5: performing physical and chemical inspection, namely performing physical and chemical property inspection on the sintered product, judging whether the sintered product is qualified or not, and marking unqualified products;
s6: immersing in oil, namely immersing the qualified sintered product in engine oil;
s7: machining, namely finish turning the inner surface and the outer surface of the blank;
s8: grinding, namely grinding the outer circle and the end face of the blank;
s9: and packaging and warehousing after the inspection is qualified, inspecting the valve seat ring which completes the steps according to the design requirement, packaging and warehousing the qualified finished product, and independently marking the unqualified finished product.
2. The process for manufacturing a valve seat insert according to claim 1, wherein: the physical and chemical properties in the step S5 refer to the examination of hardness, crush value, chemical composition and metallography.
3. The process for manufacturing a valve seat insert according to claim 1, wherein: and in the step S4, the valve seat rings are stacked and sintered, and the number of stacked layers is 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110723667.4A CN113414393B (en) | 2021-06-29 | 2021-06-29 | Processing technology of valve retainer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110723667.4A CN113414393B (en) | 2021-06-29 | 2021-06-29 | Processing technology of valve retainer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113414393A CN113414393A (en) | 2021-09-21 |
| CN113414393B true CN113414393B (en) | 2023-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110723667.4A Active CN113414393B (en) | 2021-06-29 | 2021-06-29 | Processing technology of valve retainer |
Country Status (1)
| Country | Link |
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| CN (1) | CN113414393B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114769598B (en) * | 2022-04-28 | 2024-04-09 | 安庆帝伯粉末冶金有限公司 | Copper-infiltration sintering method for valve guide pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668044A (en) * | 2012-09-13 | 2014-03-26 | 莫文剑 | Copper-infiltrated paste as well as preparation method and application thereof |
| CN104923791A (en) * | 2015-03-29 | 2015-09-23 | 安徽同丰橡塑工业有限公司 | Machining technique for valve seat ring |
| CN105537593A (en) * | 2016-01-14 | 2016-05-04 | 温岭市恒丰粉末冶金有限公司 | Production technology for valve seat rings |
| CN107175333A (en) * | 2017-04-10 | 2017-09-19 | 安徽白兔湖粉末冶金有限公司 | High-performance powder smelting inlet valve seat ring and preparation method thereof |
| CN108372303A (en) * | 2017-01-30 | 2018-08-07 | 赛峰飞机发动机公司 | For manufacturing the method including applying coating for passing through part made from powder metallurgy |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10391557B2 (en) * | 2016-05-26 | 2019-08-27 | Kennametal Inc. | Cladded articles and applications thereof |
-
2021
- 2021-06-29 CN CN202110723667.4A patent/CN113414393B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668044A (en) * | 2012-09-13 | 2014-03-26 | 莫文剑 | Copper-infiltrated paste as well as preparation method and application thereof |
| CN104923791A (en) * | 2015-03-29 | 2015-09-23 | 安徽同丰橡塑工业有限公司 | Machining technique for valve seat ring |
| CN105537593A (en) * | 2016-01-14 | 2016-05-04 | 温岭市恒丰粉末冶金有限公司 | Production technology for valve seat rings |
| CN108372303A (en) * | 2017-01-30 | 2018-08-07 | 赛峰飞机发动机公司 | For manufacturing the method including applying coating for passing through part made from powder metallurgy |
| CN107175333A (en) * | 2017-04-10 | 2017-09-19 | 安徽白兔湖粉末冶金有限公司 | High-performance powder smelting inlet valve seat ring and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN113414393A (en) | 2021-09-21 |
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Effective date of registration: 20230728 Address after: No.18 Fengtian Avenue, Shapingba District, Chongqing 400037 Applicant after: Chongqing Huafu Industry Co.,Ltd. Address before: 402761 Qingming Village, Qinggang Street, Bishan District, Chongqing City Applicant before: Chongqing Huafu New Material Technology Co.,Ltd. |
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