CN103667869B - A kind of surface alloying cylinder sleeve and production method thereof - Google Patents
A kind of surface alloying cylinder sleeve and production method thereof Download PDFInfo
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- CN103667869B CN103667869B CN201310678303.4A CN201310678303A CN103667869B CN 103667869 B CN103667869 B CN 103667869B CN 201310678303 A CN201310678303 A CN 201310678303A CN 103667869 B CN103667869 B CN 103667869B
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Abstract
The present invention relates to a kind of surface alloying cylinder sleeve, by weight percentage, its materials chemistry consists of: carbon 2.7 ~ 3.2%, silicon 1.3 ~ 2.3%, 0 < phosphorus < 0.1%, 0 < sulphur < 0.08%, manganese 0.3 ~ 0.5%, nickel 0.7 ~ 1.3%, molybdenum 0.7 ~ 1.1%, surplus is Fe.This cylinder sleeve adds silicon carbide ceramics powder in centrifugal casting process, the ceramic powder making density less under centrifugal action is enriched in inboard wall of cylinder liner, thus make inboard wall of cylinder liner formative tissue be the mixed hardening layer of bainite+a small amount of residual austenite+high density ceramic powder (Dispersed precipitate), this mixed hardening thickness 0.01-0.02mm, overall tensile strength reaches more than 350MPa, hardness is greater than 280HB, and this cylinder sleeve has the advantages such as intensity is high, wear resistance is good.
Description
Technical field
The invention belongs to cylinder sleeve technology field, be specifically related to a kind of surface alloying cylinder sleeve and production method thereof.
Background technology
Current cylinder liner material mostly is common grey iron or cast alloy iron, and such cylinder sleeve mainly relies on reduction carbon equivalent and alloy strengthening to meet the requirement of intensity and wear resistance.If intensity and wear resistance poor, easily cause because of premature wear losing efficacy, the requirement of high-power machine to cylinder sleeve intensity and wear resistance can not be met.
Summary of the invention
The object of the invention is to provide a kind of surface alloying cylinder sleeve and production method thereof, and this cylinder sleeve has good tensile strength and hardness.
For achieving the above object, the technical scheme taked of the present invention is as follows:
A kind of surface alloying cylinder sleeve, by weight percentage, its materials chemistry consists of:
Carbon (C) 2.7 ~ 3.2%, silicon (Si) 1.3 ~ 2.3%, 0 < phosphorus (P) < 0.1%, 0 < sulphur (S) < 0.08%, manganese (Mn) 0.3 ~ 0.5%, nickel (Ni) 0.7 ~ 1.3%, molybdenum (Mo) 0.7 ~ 1.1%, surplus is Fe.
The production method of above-mentioned surface alloying cylinder sleeve, it comprises the steps:
1) melting: preparation raw material in proportion, is then smelted into molten iron in medium-frequency induction furnace, smelting temperature is 1490 ~ 1550 DEG C; Adopt following current to breed mode (once breeding) during molten iron discharging and add the mixture accounting for weight of molten iron 0.5 ~ 0.6%, be made up of silicon carbide ceramics powder and silicon iron inoculator;
2) cast: adopt water-cooled metal mould rotary casting common process (quantitative method) production cylinder sleeve cast part, pouring temperature 1450 ~ 1490 DEG C, adds the mixture accounting for weight of molten iron 0.1 ~ 0.2%, be made up of silicon carbide ceramics powder and silicon strontium nucleating agent when (late inoculation) is bred at the bag end; Control foundry goods mold clearing temperature and be not less than 850 DEG C;
3) tunnel type air-cooling stove is adopted to be chilled to 460 ~ 480 DEG C after foundry goods depanning, then proceeding to slow cooling 1 ~ 2h in staged continuous tunnel furnace (seven segmentations insulation, every 30 DEG C a section) makes temperature be down to 250 ~ 270 DEG C, roughing is carried out again through air cooling after coming out of the stove, carry out temper at 460 ~ 500 DEG C of insulation 2 ~ 3h after roughing, carry out precision work after tempering and get final product.
Concrete, in mixture described in step 1), the weight ratio of silicon carbide ceramics powder and silicon iron inoculator is 1:3.5 ~ 4.0; Step 2) weight ratio of silicon carbide ceramics powder and silicon strontium nucleating agent is 1:3.5 ~ 4.0 in described mixture.
Compared to the prior art, beneficial effect of the present invention:
Cylinder liner blank adds silicon carbide ceramics powder in centrifugal casting process, the ceramic powder making density less under centrifugal action is enriched in inboard wall of cylinder liner, thus make inboard wall of cylinder liner formative tissue be the mixed hardening layer of bainite+a small amount of residual austenite+high density ceramic powder (Dispersed precipitate), this mixed hardening thickness 0.01-0.02mm, overall tensile strength reaches more than 350MPa, and hardness is greater than 280HB.Relative to traditional graphitic cast iron material cylinder sleeve, cylinder sleeve of the present invention has the advantages such as intensity is high, wear resistance is good.
Accompanying drawing explanation
Fig. 1 is the metallographic structure that cylinder liner internal wall of the present invention amplifies 100 times;
Fig. 2 is the metallographic structure that cylinder liner internal wall of the present invention amplifies 500 times.
Embodiment
Below by way of preferred embodiment, the present invention is described in further detail, but protection scope of the present invention is not limited thereto.
In following embodiment, silicon carbide ceramics powder shape used is approximately spherical, granularity 100 ~ 270 order.Add-on (T) foundation of silicon carbide ceramics powder: the quality of the density × cylinder sleeve of the surface-area × silicon carbide ceramics of T=cylinder liner internal wall.
Once to breed silicon iron inoculator used be the granularity of producing purchased from Ningxia Zhu Feng specific alloy company limited is 75 silicon iron inoculator of 1-3mm.The silicon strontium nucleating agent of late inoculation silicon strontium nucleating agent used to be the granularity of producing purchased from Ningxia Zhu Feng specific alloy company limited be 0.3-0.4mm.
embodiment 1
A kind of surface alloying cylinder sleeve, by weight percentage, its materials chemistry consists of:
| Element | C | Si | P | S | Mn | Ni | Mo | Iron |
| Weight percent (%) | 2.85 | 1.95 | 0.027 | 0.022 | 0.3 | 1.05 | 0.78 | Surplus |
The production method of above-mentioned surface alloying cylinder sleeve, it comprises the steps:
1) melting: preparation raw material in proportion, is then smelted into molten iron in medium-frequency induction furnace, smelting temperature is 1500 DEG C; Adopt following current to breed mode during molten iron discharging and add the mixture (weight ratio of silicon carbide ceramics powder and silicon iron inoculator is 1:3.5) accounting for weight of molten iron 0.5%, be made up of silicon carbide ceramics powder and silicon iron inoculator;
2) cast: adopt water-cooled metal mould rotary casting common process production cylinder sleeve cast part (centrifuge speed 1600 revs/min, water 15 seconds, swash water 55 seconds, reduce 100 ± 10 seconds), pouring temperature 1480 DEG C, adds the mixture (weight ratio of silicon carbide ceramics powder and silicon strontium nucleating agent is 1:3.5) accounting for weight of molten iron 0.2%, be made up of silicon carbide ceramics powder and silicon strontium nucleating agent when the bag end breeds; Control foundry goods mold clearing temperature and be not less than 800 DEG C.
3) tunnel type air-cooling stove is put into after foundry goods depanning, quenching to 480 DEG C, then proceeding in staged continuous tunnel furnace (seven segmentations insulations, every 30 DEG C one section) slow cooling 1.5h makes temperature be down to 270 DEG C, roughing is carried out again through air cooling after coming out of the stove, carry out temper at 480 DEG C of insulation 3h after roughing, carry out precision work after tempering and get final product.
This cylinder sleeve finished product inwall matrix is the mixed hardening layer (see Fig. 1 and 2) of bainite+a small amount of residual austenite+high-density silicon carbide ceramic layer powder Dispersed precipitate, and thin hardened layer is 0.01-0.02mm.The tensile strength of cylinder sleeve is 370Mpa, and hardness is 290HB.
embodiment 2
A kind of surface alloying cylinder sleeve, by weight percentage, its materials chemistry consists of:
| Element | C | Si | P | S | Mn | Ni | Mo | Iron |
| Weight percent (%) | 2.75 | 2.05 | 0.025 | 0.02 | 0.4 | 1.20 | 0.90 | Surplus |
The production method of above-mentioned surface alloying cylinder sleeve, it comprises the steps:
1) melting: preparation raw material in proportion, is then smelted into molten iron in medium-frequency induction furnace, smelting temperature is 1530 DEG C; Adopt following current to breed mode during molten iron discharging and add the mixture (weight ratio of silicon carbide ceramics powder and silicon iron inoculator is 1:4.0) accounting for weight of molten iron 0.6%, be made up of silicon carbide ceramics powder and silicon iron inoculator;
2) cast: adopt water-cooled metal mould rotary casting common process production cylinder sleeve cast part (centrifuge speed 1800 revs/min, water 15 seconds, swash water 55 seconds, reduce 100 ± 10 seconds), pouring temperature 1450 DEG C, adds the mixture (weight ratio of silicon carbide ceramics powder and silicon strontium nucleating agent is 1:4.0) accounting for weight of molten iron 0.1%, be made up of silicon carbide ceramics powder and silicon strontium nucleating agent when the bag end breeds; Control foundry goods mold clearing temperature and be not less than 850 DEG C.
3) tunnel type air-cooling stove is put into after foundry goods depanning, quenching to 460 DEG C, then proceeds to slow cooling 1.5h in staged continuous tunnel furnace and makes temperature be down to 250 DEG C, carry out roughing again after coming out of the stove through air cooling, carry out temper at 480 DEG C of insulation 3h after roughing, carry out precision work after tempering and get final product.
This cylinder sleeve finished product inwall matrix is the mixed hardening layer of bainite+a small amount of residual austenite+high-density silicon carbide ceramic layer powder Dispersed precipitate, and thin hardened layer is 0.01-0.02mm.The tensile strength of cylinder sleeve is 360Mpa, and hardness is 286HB.
embodiment 3
A kind of surface alloying cylinder sleeve, by weight percentage, its materials chemistry consists of:
| Element | C | Si | P | S | Mn | Ni | Mo | Iron |
| Weight percent (%) | 2.95 | 2.15 | 0.035 | 0.03 | 0.5 | 0.95 | 0.93 | Surplus |
The production method of above-mentioned surface alloying cylinder sleeve, it comprises the steps:
1) melting: preparation raw material in proportion, is then smelted into molten iron in medium-frequency induction furnace, smelting temperature is 1550 DEG C; Adopt following current to breed mode when tapping a blast furnace and add the mixture (weight ratio of silicon carbide ceramics powder and silicon iron inoculator is 1:3.5) accounting for weight of molten iron 0.5%, be made up of silicon carbide ceramics powder and silicon iron inoculator;
2) cast: adopt water-cooled metal mould rotary casting common process production cylinder sleeve cast part (centrifuge speed 1700 revs/min, water 15 seconds, swash water 55 seconds, reduce 100 ± 10 seconds), pouring temperature 1460 DEG C, adds the mixture (weight ratio of silicon carbide ceramics powder and silicon strontium nucleating agent is 1:4.0) accounting for weight of molten iron 0.1%, be made up of silicon carbide ceramics powder and silicon strontium nucleating agent when the bag end breeds; Control foundry goods mold clearing temperature and be not less than 820 DEG C.
3) tunnel type air-cooling stove is put into after foundry goods depanning, quenching to 460 DEG C, then proceeds to slow cooling 1.5h in staged continuous tunnel furnace and makes temperature be down to 250 DEG C, carry out roughing again after coming out of the stove through air cooling, carry out temper at 480 DEG C of insulation 3h after roughing, carry out precision work after tempering and get final product.
This cylinder sleeve finished product inwall matrix is the mixed hardening layer of bainite+a small amount of residual austenite+high-density silicon carbide ceramic layer powder Dispersed precipitate, and thin hardened layer is 0.01-0.02mm.The tensile strength of cylinder sleeve is 370Mpa, and hardness is 290HB.
Claims (1)
1. the production method of a surface alloying cylinder sleeve, it is characterized in that, described surface alloying cylinder sleeve, by weight percentage, its materials chemistry consists of: carbon 2.7 ~ 3.2%, silicon 1.3 ~ 2.3%, 0 < phosphorus < 0.1%, 0 < sulphur < 0.08%, manganese 0.3 ~ 0.5%, nickel 0.7 ~ 1.3%, molybdenum 0.7 ~ 1.1%, and surplus is Fe;
Specifically comprise the steps:
1) melting: preparation raw material in proportion, is then smelted into molten iron in medium-frequency induction furnace, smelting temperature is 1490 ~ 1550 DEG C; Adopt following current to breed mode during molten iron discharging and add the mixture accounting for weight of molten iron 0.5 ~ 0.6%, be made up of silicon carbide ceramics powder and silicon iron inoculator;
2) cast: adopt water-cooled metal mould rotary casting common process production cylinder sleeve cast part, pouring temperature 1450 ~ 1490 DEG C, adds the mixture accounting for weight of molten iron 0.1 ~ 0.2%, be made up of silicon carbide ceramics powder and silicon strontium nucleating agent when the bag end breeds; Control foundry goods mold clearing temperature and be not less than 850 DEG C;
3) tunnel type air-cooling stove is adopted to be chilled to 460 ~ 480 DEG C after foundry goods depanning, then proceeding to slow cooling 1 ~ 2h in staged continuous tunnel furnace makes temperature be down to 250 ~ 270 DEG C, roughing is carried out again through air cooling after coming out of the stove, carry out temper at 460 ~ 500 DEG C of insulation 2 ~ 3h after roughing, carry out precision work after tempering and get final product;
In mixture described in step 1), the weight ratio of silicon carbide ceramics powder and silicon iron inoculator is 1:3.5 ~ 4.0; Step 2) weight ratio of silicon carbide ceramics powder and silicon strontium nucleating agent is 1:3.5 ~ 4.0 in described mixture.
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| CN104561763A (en) * | 2015-01-13 | 2015-04-29 | 安庆帝伯格茨缸套有限公司 | Method for producing air cylinder sleeve with silicon based material hardened layer |
| CN111719077B (en) * | 2020-06-30 | 2021-11-26 | 河南中原吉凯恩气缸套有限公司 | Ultra-low carbon and low silicon bainite matrix gray cast iron cylinder sleeve and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03265761A (en) * | 1990-03-15 | 1991-11-26 | Teikoku Piston Ring Co Ltd | Cylinder liner |
| KR20090061409A (en) * | 2007-12-11 | 2009-06-16 | 현대자동차주식회사 | Autemperd ductile cast iron composition for connecting rod and and manufacturing method of connecting rod using the same |
| CN101592097A (en) * | 2008-05-29 | 2009-12-02 | 韦星野 | The processing method of anti-sandstorm cylinder sleeve |
| CN102634720A (en) * | 2012-04-17 | 2012-08-15 | 扬州五亭桥缸套有限公司 | Nodular cast iron cylinder sleeve and manufacturing method thereof |
| CN102676912A (en) * | 2012-05-30 | 2012-09-19 | 河南中原吉凯恩气缸套有限公司 | Low-carbon and low-silicon cylinder sleeve and preparation method thereof |
| CN103131945A (en) * | 2013-03-26 | 2013-06-05 | 河南中原吉凯恩气缸套有限公司 | Boron-containing low-carbon bainite cylinder jacket and preparation method thereof |
-
2013
- 2013-12-14 CN CN201310678303.4A patent/CN103667869B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03265761A (en) * | 1990-03-15 | 1991-11-26 | Teikoku Piston Ring Co Ltd | Cylinder liner |
| KR20090061409A (en) * | 2007-12-11 | 2009-06-16 | 현대자동차주식회사 | Autemperd ductile cast iron composition for connecting rod and and manufacturing method of connecting rod using the same |
| CN101592097A (en) * | 2008-05-29 | 2009-12-02 | 韦星野 | The processing method of anti-sandstorm cylinder sleeve |
| CN102634720A (en) * | 2012-04-17 | 2012-08-15 | 扬州五亭桥缸套有限公司 | Nodular cast iron cylinder sleeve and manufacturing method thereof |
| CN102676912A (en) * | 2012-05-30 | 2012-09-19 | 河南中原吉凯恩气缸套有限公司 | Low-carbon and low-silicon cylinder sleeve and preparation method thereof |
| CN103131945A (en) * | 2013-03-26 | 2013-06-05 | 河南中原吉凯恩气缸套有限公司 | Boron-containing low-carbon bainite cylinder jacket and preparation method thereof |
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Address after: 454750 Huaihe Road, Mengzhou industrial agglomeration area, Henan, China, No. 69, No. Applicant after: Central Plains Nei Pei Group Plc Address before: 454750 No. 146 Han Yu Avenue, Mengzhou, Henan, Jiaozuo Applicant before: Zhongyuan Neipei Co., Ltd., Henan Prov. |
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Inventor after: Zhang Liangliang Inventor after: Qin Xiaocai Inventor after: Yang Shixin Inventor after: Liu Yongfeng Inventor after: Li Yuexia Inventor after: Yi Na Inventor after: Li Hongjie Inventor before: Zhang Liangliang Inventor before: Qin Xiaocai Inventor before: Liu Yongfeng Inventor before: Li Hongjie |
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Free format text: CORRECT: APPLICANT; FROM: ZHONGYUAN NEIPEI CO., LTD., HENAN PROV. TO: ZHONGYUAN NEIPEI GROUP CO., LTD. Free format text: CORRECT: INVENTOR; FROM: ZHANG LIANGLIANG QIN XIAOCAI LIU YONGFENG LI HONGJIE TO: ZHANG LIANGLIANG QIN XIAOCAI YANG SHIXIN LIU YONGFENG LI YUEXIA YI NA LI HONGJIE |
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