CN103741048A - Piston packing ring of gasoline engine and preparation method thereof - Google Patents
Piston packing ring of gasoline engine and preparation method thereof Download PDFInfo
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- CN103741048A CN103741048A CN201310735227.6A CN201310735227A CN103741048A CN 103741048 A CN103741048 A CN 103741048A CN 201310735227 A CN201310735227 A CN 201310735227A CN 103741048 A CN103741048 A CN 103741048A
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Abstract
The invention provides a piston packing ring of a gasoline engine and a preparation method thereof. In order to maintain the elasticity of the packing ring at high temperature, a matrix component is prepared by utilizing iron powder, graphite, silicon iron powder, manganese iron powder and the like, graphite, MoS2 and CaF2 are added as lubricating agents, WC, TiC, VC and Cr3C2 are added as hard phases to improve the wear resistance, V and Mo are added as alloying elements to improve the high temperature performance of the packing ring, Cu powder is added to improve the heat dissipation performance of the packing ring, and powder mixing, pressing, sintering, grinding and opening processes are carried out to prepare the packing ring. The method can be used for preparing the packing ring through near-net-shape forming, only needs simple grinding and opening treatment after sintering, has short process flow and is low in cost. The packing ring is free from the casting defects such as loosening, cavity shrinkage, component segregation, coarse and large lamellar structures and the like, has uniform and fine microscopic structures, is easy in addition of the alloying elements, lubricating components and hard phase particles, and has excellent performances. Besides, the process has high operational stability and strong repeatability and can achieve continuous batch production.
Description
Technical field
The invention belongs to powder metallurgical technology, a kind of preparation method of piston of gasoline engine packing is provided especially.
Technical background
Piston ring is a metallic elastic ring that has otch, common name piston ring.During work, packing is subject to the effect of working medium pressure to be adjacent to a side of ring slot, by packing external cylindrical surface be adjacent to end face and jointly seal.Packing is mainly used in reciprocating compressor that service temperature is higher and the piston packing of oil engine, and the rotating shaft sealing of steam turbine.
At present, the preparation method of packing has casting and two kinds of machinings, while utilizing casting technique production packing, conventionally take cast iron as material, and this processing method exists the problem that operation is many, yield rate is low, cost is high, and cast iron is not wear-resisting; While adopting process for machining, multiselect is forged machine material material with 65Mn, and through machining processes such as rear car, millings, yet because elastic expansion ring belongs to thin-walled multi-notch element, in cold/hot procedure, exist the factors such as various stress and clamping workpiece be improper, make elastic expansion ring machining deformation serious, scrap rate, up to 70% ~ 80%, significantly improves manufacturing cost.
Powder metallurgical technique can be realized the near-net-shape of complex component easily, avoided the problem of machining wastage of material, complex procedures, and be easy to add various alloying elements, its packing goods of preparing are without casting flaws such as loose, shrinkage cavity, component segregation and thick lamellar structures, there is evenly tiny microstructure, good mechanical properties, therefore developing powder metallurgy packing product has obvious advantage.
Summary of the invention
The object of the present invention is to provide a kind of powder metallurgy process method for the production of piston ring.In order to make packing keep the elasticity under high temperature, utilize the preparation matrix mixed powders such as iron powder, graphite, ferrosilicon powder, ferromanganese powder, add graphite, MoS
2, CaF
2as lubricant, add WC, TiC, VC, Cr
3c
2as hard phase, improve wear resisting property, add V, Mo and improve packing high-temperature behavior as alloying element, add Cu powder and improve packing heat dispersion, through mixed powder, compacting, sintering, grinding, opening, prepare packing.For reaching above object, concrete technology parameter and the flow process of employing are as follows:
(1) by iron powder: graphite: ferrosilicon: ferromanganese: chromium powder: nickel powder: copper powder in mass ratio=90.03 ~ 93.72:0.62 ~ 0.70:1.13 ~ 2.47:4.50 ~ 6.00:0.01 ~ 0.3:0.01 ~ 0.30:0.01 ~ 0.2 is made into packing matrix mixed powder;
(2) by above-mentioned packing matrix mixed powder: lubricant: hard phase: alloying element: copper powder is 94.7 ~ 98.3:0.5 ~ 0.8:1.0 ~ 2.0:0.1 ~ 2.0:0.1 ~ 0.5 batching in mass ratio, mixes 8 ~ 15h in ball mill;
(3) powder after mixing is pressed under 600 ~ 700MPa pressure to piston ring base substrate, pressed density is 6.8 ~ 7.1g/cm
3;
(4) by packing base substrate at H
21150 ~ 1200 ℃ of sintering 1 ~ 2h under atmospheric condition, sintered density is 7.68 ~ 7.75 g/cm
3;
(5) piston ring after sintering is carried out to grinding and opening and process, obtain powder metallurgy piston ring product.
Wherein, iron powder is water-atomized iron powder, purity >99%, and granularity is-200 orders, through 650 ~ 680 ℃, 1hH
2anneal; Graphite purity >99%, granularity is 20 ~ 50 μ m; Ferrosilicon powder purity >99%, silicone content is 15wt.%, granularity is-200 ~ 320 orders; Ferromanganese powder purity >99%, manganese content is 20wt.%, granularity is-200 ~ 320 orders; Chromium powder purity >99%, granularity is-200 ~ 320 orders; Nickel powder purity >99%, granularity is-200 ~ 320 orders; Copper powder purity >99%, granularity is-200 ~ 320 orders;
Lubricant is graphite, CaF
2, MoS
2in a kind of, purity >99%, granularity is 10 ~ 20 μ m;
Hard phase is WC, TiC, VC, Cr
3c
2in a kind of, purity >99%, granularity is 1 ~ 5 μ m;
Alloying element is a kind of in V, Mo, purity >99%, and granularity is 20 ~ 50 μ m;
The invention has the advantages that:
(1) technical process is short, cost is low: prepare packing with process for machining and compare, the present invention utilizes powder metallurgy process, can prepare packing by near-net-shape, only need after sintering, carry out simple grinding and opening and process, therefore technical process is short, can reduce costs to greatest extent;
(2) excellent performance; Compare with conventional cast packing, powder metallurgy packing, without casting flaws such as loose, shrinkage cavity, component segregation and thick lamellar structures, has evenly tiny microstructure, and is easy to add lubricant component, hard phase, high-melting point alloy element, excellent performance.
(3) this technological operation stability is high, repeatable strong, can realize the mass of high-performance packing and produce continuously.
Embodiment
embodiment 1:
(1) take-200 order iron powder 180.06g, 20 μ m graphite 1.40g ,-200 order ferrosilicon powder 4.94g ,-200 order ferromanganese 12.00g ,-200 order chromium powder 0.50g ,-200 order nickel powder 0.60g ,-200 order copper powder 0.50g, be made into packing matrix mixed powder 200g altogether;
(2) by the CaF of the above-mentioned packing matrix of 200g mixed powder, 10 μ m
2the vanadium powder 4.22g of the WC4.22g of 1.69g, 1 μ m, 20 μ m ,-200 order Cu powder 1.06g are made into compound, mix 8h in ball mill;
(3) powder after mixing is pressed under 600MPa pressure to piston ring base substrate, pressed density is 6.8g/cm
3;
(4) by packing base substrate at H
2the lower 1150 ℃ of sintering 2h of atmospheric condition, sintered density is 7.68g/cm
3;
(5) piston ring after sintering is carried out to grinding and opening and process, obtain powder metallurgy piston ring product.
embodiment 2:
(1) take 320 order iron powder 281.16g, 50 μ m graphite 1.86g, 320 order ferrosilicon powder 3.39g, 320 order ferromanganese 13.50g, 320 order chromium powder 0.03g, 320 order nickel powder 0.03g, 320 order copper powder 0.03g, be made into packing matrix mixed powder 300g altogether;
(2) by the MoS of above-mentioned 300g packing matrix mixed powder, 20 μ m
2the vanadium powder 0.31g of the TiC3.05g of 1.53g, 5 μ m, 50 μ m, 320 order Cu powder 0.31g are made into compound, mix 15h in ball mill;
(3) powder after mixing is pressed under 700MPa pressure to piston ring base substrate, pressed density is 7.1g/cm
3;
(4) by packing base substrate at H
2the lower 1200 ℃ of sintering 1h of atmospheric condition, sintered density is 7.75g/cm
3;
(5) piston ring after sintering is carried out to grinding and opening and process, obtain powder metallurgy piston ring product.
embodiment 3:
(1) take-200 order iron powder 460.25g, 30 μ m graphite 3.25g, 320 order ferrosilicon powder 7.90g ,-200 order ferromanganese 26.00g, 320 order chromium powder 0.80g ,-200 order nickel powder 0.60g, 320 order copper powder 1.20g, be made into packing matrix mixed powder 500g altogether;
(2) above-mentioned 500g packing matrix mixed powder, the graphite 3.09g of 20 μ m, the vanadium powder 2.57g of the WC7.72g of 3 μ m, 45 μ m ,-200 order Cu powder 1.54g are made into compound, in ball mill, mix 12h;
(3) powder after mixing is pressed under 650MPa pressure to piston ring base substrate, pressed density is 6.92g/cm
3;
(4) by packing base substrate at H
2the lower 1180 ℃ of sintering 1.5h of atmospheric condition, sintered density is 7.71g/cm
3;
(5) piston ring after sintering is carried out to grinding and opening and process, obtain powder metallurgy piston ring product.
Claims (10)
1. a piston of gasoline engine packing, is characterized in that, comprises packing matrix mixed powder and additive, wherein:
Packing matrix mixed powder is: iron powder: graphite: ferrosilicon: ferromanganese: chromium powder: nickel powder: copper powder in mass ratio=90.03 ~ 93.72:0.62 ~ 0.70:1.13 ~ 2.47:4.50 ~ 6.00:0.01 ~ 0.3:0.01 ~ 0.30:0.01 ~ 0.2;
Additive is lubricant, hard phase, alloying element, copper powder, and itself and packing matrix mixed powder mass ratio are: packing matrix mixed powder: lubricant: hard phase: alloying element: copper powder is 94.7 ~ 98.3:0.5 ~ 0.8:1.0 ~ 2.0:0.1 ~ 2.0:0.1 ~ 0.5 in mass ratio.
2. a kind of piston of gasoline engine packing according to claim 1, is characterized in that, iron powder is water-atomized iron powder, purity >99%, and granularity is-200 orders, through 650 ~ 680 ℃, 1hH
2anneal; Graphite purity >99%, granularity is 20 ~ 50 μ m; Ferrosilicon powder purity >99%, silicone content is 15wt.%, granularity is-200 ~ 320 orders; Ferromanganese powder purity >99%, manganese content is 20wt.%, granularity is-200 ~ 320 orders; Chromium powder purity >99%, granularity is-200 ~ 320 orders; Nickel powder purity >99%, granularity is-200 ~ 320 orders; Copper powder purity >99%, granularity is-200 ~ 320 orders.
3. a kind of piston of gasoline engine packing according to claim 1, is characterized in that, lubricant is graphite, CaF
2, MoS
2in a kind of, purity >99%, granularity is 10 ~ 20 μ m.
4. a kind of piston of gasoline engine packing according to claim 1, is characterized in that: hard phase is WC, TiC, VC, Cr
3c
2in a kind of, purity >99%, granularity is 1 ~ 5 μ m.
5. a kind of piston of gasoline engine packing according to claim 1, is characterized in that: alloying element is a kind of in V, Mo, purity >99%, and granularity is 20 ~ 50 μ m.
6. a preparation method for piston of gasoline engine packing, is characterized in that:
(1) by iron powder: graphite: ferrosilicon: ferromanganese: chromium powder: nickel powder: copper powder in mass ratio=90.03 ~ 93.72:0.62 ~ 0.70:1.13 ~ 2.47:4.50 ~ 6.00:0.01 ~ 0.3:0.01 ~ 0.30:0.01 ~ 0.2;
(2) by above-mentioned packing matrix mixed powder: lubricant: hard phase: alloying element: copper powder is 94.7 ~ 98.3:0.5 ~ 0.8:1.0 ~ 2.0:0.1 ~ 2.0:0.1 ~ 0.5 batching in mass ratio, mixes 8 ~ 15h in ball mill;
(3) powder after mixing is pressed under 600 ~ 700MPa pressure to piston ring base substrate, pressed density is 6.8 ~ 7.1g/cm
3;
(4) by packing base substrate at H
21150 ~ 1200 ℃ of sintering 1 ~ 2h under atmospheric condition, sintered density is 7.68 ~ 7.75 g/cm
3;
(5) piston ring after sintering is carried out to grinding and opening and process, obtain powder metallurgy piston ring product.
7. the preparation method of a kind of piston of gasoline engine packing according to claim 6, is characterized in that: iron powder is water-atomized iron powder, purity >99%, and granularity is-200 orders, through 650 ~ 680 ℃, 1hH
2anneal; Graphite purity >99%, granularity is 20 ~ 50 μ m; Ferrosilicon powder purity >99%, silicone content is 15wt.%, granularity is-200 ~ 320 orders; Ferromanganese powder purity >99%, manganese content is 20wt.%, granularity is-200 ~ 320 orders; Chromium powder purity >99%, granularity is-200 ~ 320 orders; Nickel powder purity >99%, granularity is-200 ~ 320 orders; Copper powder purity >99%, granularity is-200 ~ 320 orders.
8. the preparation method of a kind of piston of gasoline engine packing according to claim 6, is characterized in that: lubricant is graphite, CaF
2, MoS
2in a kind of, purity >99%, granularity is 10 ~ 20 μ m.
9. the preparation method of a kind of piston of gasoline engine packing according to claim 6, is characterized in that: hard phase is WC, TiC, VC, Cr
3c
2in a kind of, purity >99%, granularity is 1 ~ 5 μ m.
10. the preparation method of a kind of piston of gasoline engine packing according to claim 6, is characterized in that: alloying element is a kind of in V, Mo, purity >99%, and granularity is 20 ~ 50 μ m.
Priority Applications (1)
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|---|---|---|---|
| CN201310735227.6A CN103741048B (en) | 2013-12-28 | 2013-12-28 | A kind of piston of gasoline engine packing and preparation method thereof |
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|---|---|---|---|
| CN201310735227.6A CN103741048B (en) | 2013-12-28 | 2013-12-28 | A kind of piston of gasoline engine packing and preparation method thereof |
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| CN103741048B CN103741048B (en) | 2016-05-04 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105014080A (en) * | 2015-08-07 | 2015-11-04 | 萍乡市慧成精密机电有限公司 | Designing and manufacturing method of powder injection molding piston ring |
| CN107475614A (en) * | 2017-09-03 | 2017-12-15 | 安徽天裕汽车零部件制造有限公司 | A kind of automobile cage material |
| CN108085605A (en) * | 2017-12-26 | 2018-05-29 | 苏州贝尔纳德铁路设备有限公司 | A kind of wear-resistant railroad turnout steel rail and preparation method thereof |
| CN109482889A (en) * | 2018-11-27 | 2019-03-19 | 湖南英捷高科技有限责任公司 | A kind of material and powder metallurgy preparation technique of motor turning constitutional detail ball bowl |
| CN111872368A (en) * | 2019-12-30 | 2020-11-03 | 扬州立德粉末冶金股份有限公司 | Binder and preparation method for preparing powder metallurgy premixed steel powder by using binder |
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| JPH04333545A (en) * | 1991-05-08 | 1992-11-20 | Hitachi Metals Ltd | Deformed steel wire rod for two piece type oil ring of internal combustion engine and its manufacture |
| CN101041885A (en) * | 2001-02-14 | 2007-09-26 | 博哈里尔特种钢有限公司 | Steel for plastic molds and process of heat treatment thereof |
| CN103469047A (en) * | 2013-09-17 | 2013-12-25 | 北京科技大学 | Ceramimetallurgical preparation method of high-corrosion resistance weathering steel |
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2013
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04333545A (en) * | 1991-05-08 | 1992-11-20 | Hitachi Metals Ltd | Deformed steel wire rod for two piece type oil ring of internal combustion engine and its manufacture |
| CN101041885A (en) * | 2001-02-14 | 2007-09-26 | 博哈里尔特种钢有限公司 | Steel for plastic molds and process of heat treatment thereof |
| CN103469047A (en) * | 2013-09-17 | 2013-12-25 | 北京科技大学 | Ceramimetallurgical preparation method of high-corrosion resistance weathering steel |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105014080A (en) * | 2015-08-07 | 2015-11-04 | 萍乡市慧成精密机电有限公司 | Designing and manufacturing method of powder injection molding piston ring |
| CN107475614A (en) * | 2017-09-03 | 2017-12-15 | 安徽天裕汽车零部件制造有限公司 | A kind of automobile cage material |
| CN108085605A (en) * | 2017-12-26 | 2018-05-29 | 苏州贝尔纳德铁路设备有限公司 | A kind of wear-resistant railroad turnout steel rail and preparation method thereof |
| CN109482889A (en) * | 2018-11-27 | 2019-03-19 | 湖南英捷高科技有限责任公司 | A kind of material and powder metallurgy preparation technique of motor turning constitutional detail ball bowl |
| CN111872368A (en) * | 2019-12-30 | 2020-11-03 | 扬州立德粉末冶金股份有限公司 | Binder and preparation method for preparing powder metallurgy premixed steel powder by using binder |
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| CN103741048B (en) | 2016-05-04 |
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Address after: 225200 No. 13, Wenhua Road, qiliji Town, Yiling Town, Jiangdu District, Yangzhou City, Jiangsu Province Patentee after: Yangzhou Lide Powder Metallurgy Co.,Ltd. Address before: 225200 No. 13, Wenhua Road, qiliji Town, Yiling Town, Jiangdu District, Yangzhou City, Jiangsu Province Patentee before: YANGZHOU LEADER POWDER METALLURGY Co.,Ltd. |