CN103667869A - Surface alloyed cylinder jacket and production method thereof - Google Patents
Surface alloyed cylinder jacket and production method thereof Download PDFInfo
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- CN103667869A CN103667869A CN201310678303.4A CN201310678303A CN103667869A CN 103667869 A CN103667869 A CN 103667869A CN 201310678303 A CN201310678303 A CN 201310678303A CN 103667869 A CN103667869 A CN 103667869A
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- cylinder sleeve
- silicon carbide
- nucleating agent
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Abstract
The invention relates to a surface alloyed cylinder jacket, which is prepared from the following chemical raw materials in percentage by weight: 2.7-3.2% of carbon, 1.3-2.3% of silicon, more than 0 and less than 0.1% of phosphorus, more than 0 and less than 0.08% of sulphur, 0.3-0.5% of manganese, 0.7-1.3% of nickel, 0.7-1.1% of molybdenum and the balance of Fe. During the centrifugal casting process of the cylinder jacket, silicon carbide ceramic powder is added, under the action of centrifugal force, the ceramic powder with lower density is gathered on the inner wall of the cylinder jacket, thus, the inner wall of the cylinder jacket forms a hybrid hardened layer with the tissue of bainite, a small quantity of retained austenite and high-density ceramic powder (dispersedly distributed), the hybrid hardened layer is 1-0.02mm thick, the integral tensile strength is more than 350MPa, and the hardness is more than 280HB; and the cylinder jacket has the advantages of high strength, good abrasive resistance, and the like.
Description
Technical field
The invention belongs to cylinder sleeve technical field, be specifically related to a kind of surface alloying cylinder sleeve and production method thereof.
Background technology
Cylinder liner material mostly is common grey iron or cast alloy iron at present, 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 are poor, easily, because premature wear causes losing efficacy, can not meet the requirement of high-power machine to cylinder sleeve intensity and wear resistance.
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 that the present invention takes is as follows:
A 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, then in medium-frequency induction furnace, be smelted into molten iron, smelting temperature is 1490～1550 ℃; During molten iron discharging, adopt following current to breed mode (once breeding) and add the mixture that accounts for weight of molten iron 0.5～0.6%, formed by silicon carbide ceramics powder and ferrosilicon nucleating agent;
2) casting: adopt water-cooled metal mould rotary casting common process (quantitative method) production cylinder sleeve cast part, 1450～1490 ℃ of pouring temperatures, the bag end, adds the mixture that accounts for weight of molten iron 0.1～0.2%, is comprised of silicon carbide ceramics powder and silicon strontium nucleating agent while breeding (late inoculation); Control foundry goods mold clearing temperature and be not less than 850 ℃;
3) after foundry goods depanning, adopt tunnel type air-cooling stove to be chilled to 460～480 ℃, then proceeding to slow cooling 1～2h in staged continuous tunnel furnace (seven segmentations insulation, every 30 ℃ a section) makes temperature be down to 250～270 ℃, come out of the stove and carry out again roughing by air cooling, after roughing, at 460～500 ℃ of insulation 2～3h, carry out temper, after tempering, carry out precision work and get final product.
Concrete, in mixture, the weight ratio of silicon carbide ceramics powder and ferrosilicon nucleating agent is 1:3.5～4.0 described in step 1); Step 2) in described mixture, the weight ratio of silicon carbide ceramics powder and silicon strontium nucleating agent is 1:3.5～4.0.
Compared to the prior art, beneficial effect of the present invention:
Cylinder liner blank adds silicon carbide ceramics powder in centrifugal casting process, under centrifugal action, make the ceramic powder that density is less be enriched in inboard wall of cylinder liner, thereby making inboard wall of cylinder liner formative tissue is the mixed hardening layer of bainite+a small amount of residual austenite+high density ceramic powder (disperse distribution), this mixed hardening bed thickness 0.01-0.02mm, more than whole tensile strength reaches 350MPa, hardness is greater than 280HB.With respect 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 that cylinder liner internal wall of the present invention amplifies the metallographic structure of 100 times;
Fig. 2 is that cylinder liner internal wall of the present invention amplifies the metallographic structure of 500 times.
Embodiment
By preferred embodiment, the present invention is described in further detail below, but protection scope of the present invention is not limited to this.
In following embodiment, silicon carbide ceramics powder shape used is approximately spherical, granularity 100～270 orders.The add-on of silicon carbide ceramics powder (T) foundation: the quality of the density * cylinder sleeve of the surface-area * silicon carbide ceramics of T=cylinder liner internal wall.
Once breed the 75 ferrosilicon nucleating agents that ferrosilicon nucleating agent used is 1-3mm for the granularity purchased from the production of Ningxia Zhu Feng specific alloy company limited.The silicon strontium nucleating agent that late inoculation silicon strontium nucleating agent used is 0.3-0.4mm for the granularity purchased from the production of Ningxia Zhu Feng specific alloy company limited.
embodiment 1
A 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, then in medium-frequency induction furnace, be smelted into molten iron, smelting temperature is 1500 ℃; During molten iron discharging, adopt following current to breed mode and add the mixture (weight ratio of silicon carbide ceramics powder and ferrosilicon nucleating agent is 1:3.5) that accounts for weight of molten iron 0.5%, formed by silicon carbide ceramics powder and ferrosilicon nucleating agent;
2) casting: adopt water-cooled metal mould rotary casting common process production cylinder sleeve cast part (1600 revs/min of centrifuge speeds, water 15 seconds, swash water 55 seconds, reduce 100 ± 10 seconds), 1480 ℃ of pouring temperatures, the bag end, adds the mixture (weight ratio of silicon carbide ceramics powder and silicon strontium nucleating agent is 1:3.5) that accounts for weight of molten iron 0.2%, is comprised of silicon carbide ceramics powder and silicon strontium nucleating agent while breeding; Control foundry goods mold clearing temperature and be not less than 800 ℃.
3) after foundry goods depanning, put into tunnel type air-cooling stove, quenching to 480 ℃, then proceeding in staged continuous tunnel furnace (seven segmentations insulations, every 30 ℃ one section) slow cooling 1.5h makes temperature be down to 270 ℃, come out of the stove and carry out again roughing by air cooling, after roughing, at 480 ℃ of insulation 3h, carry out temper, after tempering, carry out precision work and get final product.
This cylinder sleeve finished product inwall matrix is the mixed hardening layer (seeing Fig. 1 and 2) that bainite+a small amount of residual austenite+high density carbon SiClx ceramic layer powder disperse distributes, and thin hardened layer is 0.01-0.02mm.The tensile strength of cylinder sleeve is 370Mpa, and hardness is 290HB.
embodiment 2
A 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, then in medium-frequency induction furnace, be smelted into molten iron, smelting temperature is 1530 ℃; During molten iron discharging, adopt following current to breed mode and add the mixture (weight ratio of silicon carbide ceramics powder and ferrosilicon nucleating agent is 1:4.0) that accounts for weight of molten iron 0.6%, formed by silicon carbide ceramics powder and ferrosilicon nucleating agent;
2) casting: adopt water-cooled metal mould rotary casting common process production cylinder sleeve cast part (1800 revs/min of centrifuge speeds, water 15 seconds, swash water 55 seconds, reduce 100 ± 10 seconds), 1450 ℃ of pouring temperatures, the bag end, adds the mixture (weight ratio of silicon carbide ceramics powder and silicon strontium nucleating agent is 1:4.0) that accounts for weight of molten iron 0.1%, is comprised of silicon carbide ceramics powder and silicon strontium nucleating agent while breeding; Control foundry goods mold clearing temperature and be not less than 850 ℃.
3) after foundry goods depanning, put into tunnel type air-cooling stove, quenching to 460 ℃, then proceeds to slow cooling 1.5h in staged continuous tunnel furnace and makes temperature be down to 250 ℃, comes out of the stove and carries out roughing by air cooling again, after roughing, at 480 ℃ of insulation 3h, carry out temper, after tempering, carry out precision work and get final product.
This cylinder sleeve finished product inwall matrix is the mixed hardening layer that bainite+a small amount of residual austenite+high density carbon SiClx ceramic layer powder disperse distributes, and thin hardened layer is 0.01-0.02mm.The tensile strength of cylinder sleeve is 360Mpa, and hardness is 286HB.
embodiment 3
A 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, then in medium-frequency induction furnace, be smelted into molten iron, smelting temperature is 1550 ℃; While tapping a blast furnace, adopt following current to breed mode and add the mixture (weight ratio of silicon carbide ceramics powder and ferrosilicon nucleating agent is 1:3.5) that accounts for weight of molten iron 0.5%, formed by silicon carbide ceramics powder and ferrosilicon nucleating agent;
2) casting: adopt water-cooled metal mould rotary casting common process production cylinder sleeve cast part (1700 revs/min of centrifuge speeds, water 15 seconds, swash water 55 seconds, reduce 100 ± 10 seconds), 1460 ℃ of pouring temperatures, the bag end, adds the mixture (weight ratio of silicon carbide ceramics powder and silicon strontium nucleating agent is 1:4.0) that accounts for weight of molten iron 0.1%, is comprised of silicon carbide ceramics powder and silicon strontium nucleating agent while breeding; Control foundry goods mold clearing temperature and be not less than 820 ℃.
3) after foundry goods depanning, put into tunnel type air-cooling stove, quenching to 460 ℃, then proceeds to slow cooling 1.5h in staged continuous tunnel furnace and makes temperature be down to 250 ℃, comes out of the stove and carries out roughing by air cooling again, after roughing, at 480 ℃ of insulation 3h, carry out temper, after tempering, carry out precision work and get final product.
This cylinder sleeve finished product inwall matrix is the mixed hardening layer that bainite+a small amount of residual austenite+high density carbon SiClx ceramic layer powder disperse distributes, and thin hardened layer is 0.01-0.02mm.The tensile strength of cylinder sleeve is 370Mpa, and hardness is 290HB.
Claims (3)
1. a surface alloying cylinder sleeve, is characterized in that, 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.
2. the production method of surface alloying cylinder sleeve described in claim 1, is characterized in that, comprises the steps:
1) melting: preparation raw material in proportion, then in medium-frequency induction furnace, be smelted into molten iron, smelting temperature is 1490～1550 ℃; During molten iron discharging, adopt following current to breed mode and add the mixture that accounts for weight of molten iron 0.5～0.6%, formed by silicon carbide ceramics powder and ferrosilicon nucleating agent;
2) casting: adopt water-cooled metal mould rotary casting common process production cylinder sleeve cast part, 1450～1490 ℃ of pouring temperatures, the bag end, adds the mixture that accounts for weight of molten iron 0.1～0.2%, is comprised of silicon carbide ceramics powder and silicon strontium nucleating agent while breeding; Control foundry goods mold clearing temperature and be not less than 850 ℃;
3) after foundry goods depanning, adopt tunnel type air-cooling stove to be chilled to 460～480 ℃, then proceeding to slow cooling 1～2h in staged continuous tunnel furnace makes temperature be down to 250～270 ℃, come out of the stove and carry out again roughing by air cooling, after roughing, at 460～500 ℃ of insulation 2～3h, carry out temper, after tempering, carry out precision work and get final product.
3. the production method of surface alloying cylinder sleeve as claimed in claim 2, is characterized in that, in mixture, the weight ratio of silicon carbide ceramics powder and ferrosilicon nucleating agent is 1:3.5～4.0 described in step 1); Step 2) in described mixture, the weight ratio of silicon carbide ceramics powder and silicon strontium nucleating agent is 1:3.5～4.0.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111719077A (en) * | 2020-06-30 | 2020-09-29 | 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111719077A (en) * | 2020-06-30 | 2020-09-29 | 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 |
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| CN103667869B (en) | 2015-07-29 |
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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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