CN104561763A - Method for producing air cylinder sleeve with silicon based material hardened layer - Google Patents
Method for producing air cylinder sleeve with silicon based material hardened layer Download PDFInfo
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- CN104561763A CN104561763A CN201510015689.XA CN201510015689A CN104561763A CN 104561763 A CN104561763 A CN 104561763A CN 201510015689 A CN201510015689 A CN 201510015689A CN 104561763 A CN104561763 A CN 104561763A
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- Prior art keywords
- cylinder sleeve
- percent
- air cylinder
- raw material
- silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/04—Centrifugal casting; Casting by using centrifugal force of shallow solid or hollow bodies, e.g. wheels or rings, in moulds rotating around their axis of symmetry
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention provides a method for producing an air cylinder sleeve with a silicon-based material hardened layer. The method comprises the following steps: (1) preparing the following materials according to the proportion: 2.6-3.2 percent of carbon, 1.6-2.3 percent of silicon, 0-0.8 percent of manganese, 0-0.1 percent of phosphor, 0-0.08 percent of sulfur, 0.5-1.5 percent of molybdenum, 0.6-1.5 percent of nickel and the balance of Fe; (2) smelting at the temperature of 1530+/-10 DEG C; (3) discharging the materials in the molten state, then treating by adding a nucleating agent which accounts for 0.5-0.7 percent of the materials; (4) pouring the molten iron with the rotation speed of 130G+/-3G; (5) uniformly spraying ceramic powder accounting for 0.35-0.45 percent of the materials on the inner wall of the air cylinder sleeve by using a spraying device to form a uniform metal bainite and a high-density silicon-based mixed hardened layer on the inner circle of the cylinder sleeve; and (6) cooling to obtain an air cylinder sleeve blank. According to the method for producing the air cylinder sleeve, the temperature of the molten iron is increased, and consequently the pouring temperature is increased; at the initial period of blank formation, i.e. powder spraying process, the fluidity of the molten iron is increased, and the surface tension is reduced, thus improving particle permeability; and the pouring rotation speed is reduced, so that the surface spraying times in the blank per unit time are increased, and the sprayed particles are uniform and compact.
Description
Technical field
The present invention relates to cylinder sleeve preparing technical field, be specifically related to a kind of preparation method of siliceous substrates material hardened layer cylinder sleeve.
Background technology
Cylinder sleeve is the part of widespread use in motor car engine, and its function mainly contains sealing, heat conduction and forms slipping plane with piston ring, is one of kernel component of engine.Its main failure forms has distortion, crackle and wearing and tearing.The hazardness of cylinder sleeve crackle is serious, directly can cause Defective vehicle recall, distortion and wearing and tearing then directly affect oil consumption, the emission level of engine, and the life-span of friction pair, for automobile industry, which kind of part all wishes to obtain work-ing life long as far as possible with as far as possible little cost.
Cylinder sleeve is in the market all mainly cast iron materials, wear resisting property and non-deformability have a definite limitation, in order to can better use properties be obtained, intensity and the wear resistance of cylinder sleeve is improved by adding silicon materials, the interpolation of silica-base material realizes by carrying out spraying in cylinder sleeve inner circle, but inner circle material altering, ordinary process there will be corresponding problem in process of production, mainly contain inner circle setting rate very fast, add the silica-base material particle penetration degree of depth not and lack of uniformity, current state of the art cannot reach the requirement of even application, affect the performance of product.
Summary of the invention
The invention provides a kind of preparation method that can meet the siliceous substrates material hardened layer cylinder sleeve of adding the silica-base material particle penetration degree of depth and even application requirement.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A preparation method for siliceous substrates material hardened layer cylinder sleeve, comprises the steps:
1) prepare burden: in proportion by material carbon: 2.6 ~ 3.2%, silicon 1.6 ~ 2.3%, manganese: 0-0.8%, phosphorus: 0-0.1%, sulphur: 0-0.08%, molybdenum: 0.5 ~ 1.5%, nickel: 0.6 ~ 1.5%, Fe: surplus, prepare burden;
2) melting: the raw material prepared is placed on melting in intermediate frequency furnace, makes it be fused into molten iron, and smelting temperature is 1530 ± 10 DEG C;
3) molten steel preparation: molten state raw material adds raw materials quality 0.5 ~ 0.7% nucleating agent after coming out of the stove processes;
4) molten iron cast: molten state raw material is injected centrifugal casting apparatus production cylinder sleeve cast part, cast rotating speed is 130G ± 3G;
5) powder spraying: use spray equipment by the ceramic powder even application of raw materials quality 0.35 ~ 0.45% at inboard wall of cylinder liner, under the influence of centrifugal force, ceramic particle uniform infiltration enters inboard wall of cylinder liner, round-formed uniform metal Belleville body and the silica-based mixed hardening layer of high-density in cylinder sleeve;
6) after the foundry goods depanning of casting, cool and obtain liner blank.
Preferably, in step 1), described raw material specifically includes the element raw material of following quality proportioning:: carbon: 2.6%, silicon: 2.3%, manganese: 0.8%, phosphorus: 0.1%, sulphur: 0.08%, molybdenum: 0.5%, nickel: 1.5% and iron: 92.12%.
Preferably, the thickness of described silica-based mixed hardening layer is not less than 2.5mm.
From above technical scheme, the present invention has following beneficial effect:
Improve molten iron temperature, be 1530 DEG C ± 10 DEG C after improvement, after molten iron temperature raises, teeming temperature is corresponding improve also, at the blank shaping initial stage, i.e. and powder painting process, the mobility of molten iron improves, surface tension reduces, thus strengthens particulate permeability, meets the requirement of the silica-base material particle penetration degree of depth;
Improve cast rotating speed to 130G ± 3G, after rotating speed improves, spraying total amount can not change, but in the unit time, blank internal surface spraying number of times improves, and makes sprayed particle evenly fine and close.
Accompanying drawing explanation
Fig. 1 is the schema of preparation method of the present invention.
Embodiment
Below in conjunction with accompanying drawing 1, a kind of preferred implementation of the present invention is described in detail.
Embodiment 1:
A preparation method for siliceous substrates material hardened layer cylinder sleeve, comprises the steps:
1) prepare burden: in proportion by raw material: carbon: 2.6%, silicon: 2.3%, manganese: 0.8%, phosphorus: 0.1%, sulphur: 0.08%, molybdenum: 0.5%, nickel: 1.5% and iron: 92.12% prepares burden;
2) melting: the raw material prepared is placed on melting in intermediate frequency furnace, makes it be fused into molten iron, and smelting temperature is 1530 ± 10 DEG C;
3) molten steel preparation: molten state raw material adds raw materials quality 0.5% nucleating agent after coming out of the stove processes;
4) molten iron cast: molten state raw material is injected centrifugal casting apparatus production cylinder sleeve cast part, cast rotating speed is 130G ± 3G;
5) powder spraying: use spray equipment by the ceramic powder even application of raw materials quality 0.45% at inboard wall of cylinder liner, under the influence of centrifugal force, ceramic particle uniform infiltration enters inboard wall of cylinder liner, round-formed uniform metal Belleville body and the silica-based mixed hardening layer of high-density in cylinder sleeve;
6) blank is shaping: after the foundry goods depanning of casting, cool and obtain liner blank.
Embodiment 2:
A preparation method for siliceous substrates material hardened layer cylinder sleeve, comprises the steps:
1) prepare burden: in proportion by raw material: carbon: 3.2%, silicon: 1.6%, manganese: 0.8%, phosphorus: 0.1%, sulphur: 0.08%, molybdenum: 1.5%, nickel: 0.6% and iron: 92.12% prepares burden;
2) melting: the raw material prepared is placed on melting in intermediate frequency furnace, makes it be fused into molten iron, and smelting temperature is 1530 ± 10 DEG C;
3) molten steel preparation: molten state raw material adds raw materials quality 0.7% nucleating agent after coming out of the stove processes;
4) molten iron cast: molten state raw material is injected centrifugal casting apparatus production cylinder sleeve cast part, cast rotating speed is 130G ± 3G;
5) powder spraying: use spray equipment by the ceramic powder even application of raw materials quality 0.35% at inboard wall of cylinder liner, under the influence of centrifugal force, ceramic particle uniform infiltration enters inboard wall of cylinder liner, round-formed uniform metal Belleville body and the silica-based mixed hardening layer of high-density in cylinder sleeve;
6) blank is shaping: after the foundry goods depanning of casting, cool and obtain liner blank.
The spray equipment adopted in described powder spraying step, comprise spraying dolly and controller, described spraying dolly is provided with spray gun, trolley drive motor is provided with in described spraying dolly, described spray gun is provided with spray gun backstay, this spray gun backstay front end is provided with spray gun inductor block, and described spraying dolly is provided with the position sensor for locating spraying dolly.
The location iron plate be positioned at directly over mold center can be sensed when spray gun marches to casting mold end, spray gun returns, spray gun advance with backward stroke in by ceramic powder even application at inboard wall of cylinder liner, under the influence of centrifugal force, ceramic particle uniform infiltration enters inboard wall of cylinder liner, round-formed uniform metal Belleville body and the silica-based mixed hardening layer of high-density in cylinder sleeve.
Because powder spraying step completes in 10-20S after molten iron cast step, so do not open water coolant in 20S after cast, to ensure molten iron initial stage temperature and mobility, be conducive to particle infiltration.
Before adopting the cylinder sleeve of the embodiment 1 and 2 improving rear preparation method of the present invention and improving, adopt the cylinder sleeve of original preparation method to carry out following mechanical property contrast:
Can find out that the blank hardness after improvement on average improves 40HBS, improve 14% than in the past, tensile strength on average improves 45Mpa, improves 11% than in the past.The wear resisting property and intensity that make the cylinder sleeve after improvement have been had no small lifting by this, have certain promoter action to the lifting of engine consumption reduction and emission level.
The above embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determine.
Claims (3)
1. a preparation method for siliceous substrates material hardened layer cylinder sleeve, is characterized in that, comprise the steps:
1) prepare burden: in proportion by material carbon: 2.6 ~ 3.2%, silicon 1.6 ~ 2.3%, manganese: 0-0.8%, phosphorus: 0-0.1%, sulphur: 0-0.08%, molybdenum: 0.5 ~ 1.5%, nickel: 0.6 ~ 1.5%, Fe: surplus, prepare burden;
2) melting: the raw material prepared is placed on melting in intermediate frequency furnace, makes it be fused into molten iron, and smelting temperature is 1530 ± 10 DEG C;
3) molten steel preparation: molten state raw material adds raw materials quality 0.5 ~ 0.7% nucleating agent after coming out of the stove processes;
4) molten iron cast: molten state raw material is injected centrifugal casting apparatus production cylinder sleeve cast part, cast rotating speed is 130G ± 3G;
5) powder spraying: use spray equipment by the ceramic powder even application of raw materials quality 0.35 ~ 0.45% at inboard wall of cylinder liner, under the influence of centrifugal force, ceramic particle uniform infiltration enters inboard wall of cylinder liner, round-formed uniform metal Belleville body and the silica-based mixed hardening layer of high-density in cylinder sleeve;
6) after the foundry goods depanning of casting, cool and obtain liner blank.
2. preparation method according to claim 1, it is characterized in that, in step 1), described raw material specifically includes the element raw material of following quality proportioning: carbon: 2.6%, silicon: 2.3%, manganese: 0.8%, phosphorus: 0.1%, sulphur: 0.08%, molybdenum: 0.5%, nickel: 1.5% and iron: 92.12%.
3. preparation method according to claim 1, is characterized in that, the thickness of described silica-based mixed hardening layer is not less than 2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510015689.XA CN104561763A (en) | 2015-01-13 | 2015-01-13 | Method for producing air cylinder sleeve with silicon based material hardened layer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510015689.XA CN104561763A (en) | 2015-01-13 | 2015-01-13 | Method for producing air cylinder sleeve with silicon based material hardened layer |
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| CN104561763A true CN104561763A (en) | 2015-04-29 |
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| CN201510015689.XA Pending CN104561763A (en) | 2015-01-13 | 2015-01-13 | Method for producing air cylinder sleeve with silicon based material hardened layer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105296841A (en) * | 2015-11-03 | 2016-02-03 | 合肥海源机械有限公司 | Production process of hydraulic cylinder body for forklift |
| CN105296839A (en) * | 2015-12-14 | 2016-02-03 | 季桂金 | Cylinder sleeve manufacturing process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102463329A (en) * | 2010-11-17 | 2012-05-23 | 徐金兰 | Double-blank continuous casting process |
| CN103667869A (en) * | 2013-12-14 | 2014-03-26 | 河南省中原内配股份有限公司 | Surface alloyed cylinder jacket and production method thereof |
-
2015
- 2015-01-13 CN CN201510015689.XA patent/CN104561763A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102463329A (en) * | 2010-11-17 | 2012-05-23 | 徐金兰 | Double-blank continuous casting process |
| CN103667869A (en) * | 2013-12-14 | 2014-03-26 | 河南省中原内配股份有限公司 | Surface alloyed cylinder jacket and production method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 丁彰雄等: "《船舶机械修理工艺学》", 28 February 2013, 武汉理工大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105296841A (en) * | 2015-11-03 | 2016-02-03 | 合肥海源机械有限公司 | Production process of hydraulic cylinder body for forklift |
| CN105296839A (en) * | 2015-12-14 | 2016-02-03 | 季桂金 | Cylinder sleeve manufacturing process |
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Application publication date: 20150429 |