CN104131216A - Phosphorus and niobium cast iron cylinder liner and making method thereof - Google Patents
Phosphorus and niobium cast iron cylinder liner and making method thereof Download PDFInfo
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- CN104131216A CN104131216A CN201410351934.XA CN201410351934A CN104131216A CN 104131216 A CN104131216 A CN 104131216A CN 201410351934 A CN201410351934 A CN 201410351934A CN 104131216 A CN104131216 A CN 104131216A
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- phosphorus
- niobium
- cylinder liner
- cast iron
- nucleating agent
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention relates to a phosphorus and niobium cast iron cylinder liner. The cylinder liner material comprises 2.8-3.1wt% of C, 1.8-2.2wt% of Si, 2.0-2.3wt% of Mn, 0-0.12wt% of S, 0.2-0.4wt% of P, 0.2-0.3wt% of Nb, 0.01-0.02wt% of Ce, and the balance Fe. The graphite of the cylinder liner mainly comprises A-type graphite and also comprises a small amount of D-type graphite and E-type graphite, the matrix is pearlite, and the free ferrite content is less than 3%. The hardness and the tensile strength sigmab of the work surface of the cylinder liner are 270-320HB and 350-400MPa respectively, and the cylinder liner is suitable for use in modern high-speed, high-reinforcement, high-performance, low-emission and long-life internal combustion engines, and has a low material production cost.
Description
Technical field
The invention belongs to cylinder sleeve technical field, be specifically related to a kind of phosphorus niobium cast iron cylinder cover and preparation method thereof.
Background technology
At present, cylinder sleeve material mostly is alloy gray cast-iron material, and as materials such as phosphorus alloy cast iron, boron alloy cast iron, V-Ti cast iron, copper Mo-Ni alloy cast irons, their matrix is all taking perlite as main, Tensile strength is generally 200-300MPa, and hardness is 220-260HB; Such cylinder sleeve can not meet the requirement of high-speed high-power, high detonation pressure, low emission, high performance and long service life oil engine.
As-cast bainite gray cast iron material cylinder sleeve, adds nickel and molybdenum alloy, and its matrix is as-cast bainite, and after heat treatment tensile strength is greater than 370MPa, and hardness is 270-310HB; But this kind of cylinder sleeve material produce cost is high.
Summary of the invention
The object of the invention is to provide a kind of phosphorus niobium cast iron cylinder cover and preparation 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 kind of phosphorus niobium cast iron cylinder cover, the chemical constitution of described cylinder sleeve material is counted as following weight percent:
Carbon (C): 2.8～3.1%, silicon (Si): 1.8～2.2%, manganese (Mn): 2.0～2.3%, 0 < sulphur (S)≤0.12%, phosphorus (P) 0.2～0.4%, niobium (Nb) 0.2～0.3%, cerium (Ce): 0.01～0.02%, surplus is Fe.
The preparation method of above-mentioned phosphorus niobium cast iron cylinder cover, it comprises the steps:
1. prepare burden in proportion, with frequency-conversion electric induction furnace melting ingredient acquisition iron liquid, controlling iron liquid tapping temperature is 1480～1520 DEG C;
2. before coming out of the stove, add the nucleating agent processing of iron liquid weight 0.55～0.65%, described nucleating agent is silicon barium calcium nucleating agent, silicon strontium nucleating agent or silicon titanate innoculant (such nucleating agent belongs to the long-acting complex class nucleating agent of silica-based high-efficiency);
3. adopt metal mold wet coating material rotary casting common process production cylinder sleeve cast part (as adopted conventional horizontal centrifugal casting machine, mould adopts metal type dies, and dies cavity sprays conventional wet coating material and produces).After foundry goods depanning, general nature is chilled to room temperature, then puts into foundry goods frame.
The graphite shape of the perlite gray cast iron cylinder jacket of phosphorus niobium alloy of the present invention is mainly A type, a small amount of D+E type, and matrix is perlite (see figure 2), free ferrite is less than 3%(and sees Fig. 1).The working-surface hardness of cylinder sleeve is 270-320HB, and tensile strength sigma b is 350-400MPa, be adapted at using on high speed in the present age, high strengthening, high-performance, low emission, long-life oil engine, and material produce cost is lower.
The present invention, on the basis of carbon, sulphur, silicon, phosphorus, manganese common element chemical composition, suitably increases phosphoric, significantly increases manganese element content, adds niobium alloy element, mainly can play following effect:
1, the effect of manganese: improve austenitic stability, reduce austenite to pearlitic transition temperature, have important effect to improving pearlitic dispersity, continuously making to obtain nodular troostite under cooling conditions, sorbite becomes inevitable.High manganese element make graphitic cast iron have high intensity, well wearing quality, shrink little, internal stress is little.
2, the effect of phosphorus: phosphoric is to promote graphite element in cast iron, and it can reduce the super cooling tendency of iron liquid, and he can form iron phosphide eutectic simultaneously; Iron phosphide eutectic is hard phase, and it is interrupted netted or dispersed distribution and can significantly improves the wear resistance of body material.
3, the effect of niobium: for greying, niobium is neutral element, on the impact of cylinder sleeve cast part graphite shape, distribution little.Niobium element is strong carbon, nitride forming element, they and carbon nitrogen have very strong avidity, in cylinder sleeve of the present invention, can form respectively NbC, Nb(C, N) etc. carbon, the nitride of high rigidity, being disperse distributes, with the complex matrix of pearlite matrix composition high-wearing feature, more than its microhardness reaches Hv2200.Niobium element can play good effect to the strengthening of matrix.
4, the effect of cerium: adjust iron liquid concentration fluctuations, passivation graphite, reduces matrix and isolate.
Compared to the prior art, the present invention has the following advantages:
Cylinder sleeve of the present invention adds after niobium alloy element, has the over-all propertieies such as high strength, high-wearing feature, high performance-price ratio; The graphitic cast iron that is better than existing common alloy pearlite matrix, wear resistance is significantly improved; Mechanical property (comprising tensile strength, hardness) is far above the alloy gray cast-iron of existing common pearlite matrix, suitable with bainite matrix cylinder sleeve, but its production cost reduction, cost performance is high, is the product that has very much the market advantage.
Brief description of the drawings
Fig. 1 is that cylinder sleeve of the present invention is amplified the matrix metallograph of 100 times;
Fig. 2 is that cylinder sleeve of the present invention is amplified the matrix metallograph of 500 times, can find out the Morphology of pearlite of matrix in figure.
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.
embodiment 1
A kind of phosphorus niobium cast iron cylinder cover, the chemical constitution of described cylinder sleeve material is counted as following weight percent:
| Element | C | Si | Mn | S | P | Nb | Ce | Iron |
| Weight percent (%) | 2.95 | 2.02 | 2.09 | 0.035 | 0.241 | 0.27 | 0.018 | Surplus |
The preparation method of above-mentioned phosphorus niobium cast iron cylinder cover, it comprises the steps:
1. prepare burden in proportion, with frequency-conversion electric induction furnace melting ingredient acquisition iron liquid, controlling iron liquid tapping temperature is 1503 DEG C;
2. before coming out of the stove, add the silicon barium calcium nucleating agent processing of iron liquid weight 0.6%;
3. adopt metal mold wet coating material rotary casting common process production cylinder sleeve cast part.After foundry goods depanning, be naturally chilled to room temperature, then put into foundry goods frame.
The tensile strength of producing gained cylinder sleeve is 400MPa, and hardness is 295HB.
embodiment 2
A kind of phosphorus niobium cast iron cylinder cover, the chemical constitution of described cylinder sleeve material is counted as following weight percent:
| Element | C | Si | Mn | S | P | Nb | Ce | Iron |
| Weight percent (%) | 3.01 | 2.09 | 2.05 | 0.043 | 0.283 | 0.25 | 0.012 | Surplus |
The preparation method of above-mentioned phosphorus niobium cast iron cylinder cover, it comprises the steps:
1. prepare burden in proportion, with frequency-conversion electric induction furnace melting ingredient acquisition iron liquid, controlling iron liquid tapping temperature is 1498 DEG C;
2. before coming out of the stove, add the silicon strontium nucleating agent processing of iron liquid weight 0.55%;
3. adopt metal mold wet coating material rotary casting common process production cylinder sleeve cast part.After foundry goods depanning, be naturally chilled to room temperature, then put into foundry goods frame.
The tensile strength of producing gained cylinder sleeve is 384MPa, and hardness is 292HB.
Claims (2)
1. a phosphorus niobium cast iron cylinder cover, is characterized in that, the chemical constitution of described cylinder sleeve material is counted as following weight percent:
Carbon: 2.8～3.1%, silicon: 1.8～2.2%, manganese: 2.0～2.3%, 0 < sulphur≤0.12%, phosphorus 0.2～0.4%, niobium 0.2～0.3%, cerium: 0.01～0.02%, surplus is Fe.
2. the preparation method of phosphorus niobium cast iron cylinder cover described in claim 1, is characterized in that, comprises the steps:
1. prepare burden in proportion, with frequency-conversion electric induction furnace melting ingredient acquisition iron liquid, controlling iron liquid tapping temperature is 1480～1520 DEG C;
2. before coming out of the stove, add the nucleating agent processing of iron liquid weight 0.55～0.65%, described nucleating agent is silicon barium calcium nucleating agent, silicon strontium nucleating agent or silicon titanate innoculant;
3. adopt metal mold wet coating material rotary casting common process production cylinder sleeve cast part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410351934.XA CN104131216B (en) | 2014-07-23 | 2014-07-23 | A kind of phosphorus niobium cast iron cylinder cover and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410351934.XA CN104131216B (en) | 2014-07-23 | 2014-07-23 | A kind of phosphorus niobium cast iron cylinder cover and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN104131216A true CN104131216A (en) | 2014-11-05 |
| CN104131216B CN104131216B (en) | 2016-08-24 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911467A (en) * | 2015-07-07 | 2015-09-16 | 中原内配集团股份有限公司 | Subcritical quenching cylinder sleeve and preparation method thereof |
| CN106191646A (en) * | 2016-08-31 | 2016-12-07 | 中原内配集团股份有限公司 | A kind of high-quality cylinder jacket and preparation method thereof and ferroalloy |
| CN106270370A (en) * | 2016-08-10 | 2017-01-04 | 中原内配集团股份有限公司 | A kind of needle prick shape cylinder jacket and preparation method thereof |
| US11193446B2 (en) | 2016-08-10 | 2021-12-07 | Zynp Corporation | Needle-shaped cylinder liner and preparation method therefor, and coating liquid for preparing needle-shaped cylinder liner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60247036A (en) * | 1984-05-22 | 1985-12-06 | Mitsui Eng & Shipbuild Co Ltd | Cv-cast iron cylinder liner |
| CN1084901A (en) * | 1992-09-29 | 1994-04-06 | 济南铁路局配件厂华商铸造厂 | Beeliner niobium casting iron cylinder jacket and piston ring |
| CN101381838A (en) * | 2008-10-17 | 2009-03-11 | 河南省中原内配股份有限公司 | Vermicular cast iron cylinder liner and preparation method thereof |
| CN103667861A (en) * | 2012-08-30 | 2014-03-26 | 日本活塞环株式会社 | Cylinder sleeve |
-
2014
- 2014-07-23 CN CN201410351934.XA patent/CN104131216B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60247036A (en) * | 1984-05-22 | 1985-12-06 | Mitsui Eng & Shipbuild Co Ltd | Cv-cast iron cylinder liner |
| CN1084901A (en) * | 1992-09-29 | 1994-04-06 | 济南铁路局配件厂华商铸造厂 | Beeliner niobium casting iron cylinder jacket and piston ring |
| CN101381838A (en) * | 2008-10-17 | 2009-03-11 | 河南省中原内配股份有限公司 | Vermicular cast iron cylinder liner and preparation method thereof |
| CN103667861A (en) * | 2012-08-30 | 2014-03-26 | 日本活塞环株式会社 | Cylinder sleeve |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911467A (en) * | 2015-07-07 | 2015-09-16 | 中原内配集团股份有限公司 | Subcritical quenching cylinder sleeve and preparation method thereof |
| CN104911467B (en) * | 2015-07-07 | 2016-10-05 | 中原内配集团股份有限公司 | A kind of intercritical hardening cylinder jacket and preparation method thereof |
| CN106270370A (en) * | 2016-08-10 | 2017-01-04 | 中原内配集团股份有限公司 | A kind of needle prick shape cylinder jacket and preparation method thereof |
| US11193446B2 (en) | 2016-08-10 | 2021-12-07 | Zynp Corporation | Needle-shaped cylinder liner and preparation method therefor, and coating liquid for preparing needle-shaped cylinder liner |
| CN106191646A (en) * | 2016-08-31 | 2016-12-07 | 中原内配集团股份有限公司 | A kind of high-quality cylinder jacket and preparation method thereof and ferroalloy |
| CN106191646B (en) * | 2016-08-31 | 2018-07-27 | 中原内配集团股份有限公司 | A kind of high-quality cylinder jacket and preparation method thereof and ferroalloy |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104131216B (en) | 2016-08-24 |
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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: Sun Shigui Inventor after: Xu Chao Inventor after: Zhang Liangliang Inventor after: Jiang Yuling Inventor before: Xu Chao Inventor before: Zhang Liangliang Inventor before: Xue Zhenyu Inventor before: Jiang Yuling |
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