CN102181810B - Antifriction vermicular cast iron material and preparation method - Google Patents
Antifriction vermicular cast iron material and preparation method Download PDFInfo
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- CN102181810B CN102181810B CN201110007472A CN201110007472A CN102181810B CN 102181810 B CN102181810 B CN 102181810B CN 201110007472 A CN201110007472 A CN 201110007472A CN 201110007472 A CN201110007472 A CN 201110007472A CN 102181810 B CN102181810 B CN 102181810B
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Abstract
The invention provides an antifriction vermicular cast iron material with good performances and a preparation method thereof. The preparation method has the advantages of simple process and low production cost and is suitable for industrialized production. The material takes vermicular cast iron as the substrate, wherein metal wire clusters formed by iron wires are distributed in the substrate; the diameter of the iron wires is 1-2mm; the diameter of the metal wire clusters is 10-15cm; and the iron wires account for 5-40% of the material by volume.
Description
Technical field
The invention belongs to metal material field, relate to a kind of antifriction vermicular graphite iron material and preparation method thereof.
Background technology
In metal material field, antifriction cast iron receives generally as low-cost antifriction material always and paying attention to.
CN201010128379.6 number application discloses a kind of alloy vermicular graphite iron material, it is characterized in that by weight percentage its chemical constitution is: carbon: 3.1-3.6%; Silicon: 2.1-2.85%, manganese: 0.91-1.25%, nickel: 1.05-1.45%; Molybdenum: 0.10-0.25%, titanium: 0.10-0.20%, magnesium: 0.01-0.04%; Phosphorus:＜0.05%, sulphur:＜0.07%, Yu Weitie.
CN200810230471.6 number application relates to a kind of compacted graphite cast iron air cylinder sleeve and preparation method thereof.The chemical ingredients of said compacted graphite cast iron air cylinder sleeve is following by weight: carbon 3.4-3.8%, and sulphur≤0.05%, silicon 1.8-2.6%, phosphorus≤0.50%, manganese 0.5-1.0%, chromium 0.2-0.5%, copper 0.2-0.5%, surplus is Fe.Adopting the compacted graphite cast iron air cylinder sleeve working-surface hardness of chemical constitution of the present invention is 260～320HB, tensile strength sigma
bBe 430～520MPa, meet HS and high-wearing feature requirement, and cost be relatively low, can satisfy the requirement of high speed in the present age, high reinforcement, high-performance, low emission, long lifetime heavy duty fully.There is a large amount of graphite in this cast iron, and the toughness of material and tensile strength have all received very big restriction.
Summary of the invention
The object of the invention is exactly to above-mentioned technological deficiency, and a kind of antifriction vermicular graphite iron material is provided, and this material has good performance.
Another object of the present invention provides a kind of preparation method of antifriction vermicular graphite iron material, and this preparing method's technology is simple, and production cost is low, is suitable for suitability for industrialized production.
The objective of the invention is to realize through following technical scheme:
A kind of antifriction vermicular graphite iron material, this material are matrix with the vermicular cast iron, the wire group that in matrix, is distributing and forming by iron wire, and used iron wire diameter is 1-2mm, and the diameter of wire group is 10-15cm, and the volume percent that iron wire accounts for material is 5-40%;
The following chemical components in percentage by weight of vermicular cast iron matrix: C is 3.3%～3.5%, and Si is 2.9%～3.3%, and Mn is 0.1-0.4%, and Dy is 0.5-0.8%, and < 0.03%, < 0.025%, all the other are Fe to S to P;
The following chemical components in percentage by weight of iron wire is: C is 0.05-0.09%, and Si is 0.1%～0.2%, and Mn is 0.25-0.35%, and < 0.02%, < 0.025%, all the other are Fe to S to P.
The CuC2 that also is distributed with in the matrix, Cr3Si and Cr23C6 particle.
The preparation method of antifriction vermicular graphite iron material is characterized in that: it may further comprise the steps:
The preparation of chromium plating iron wire and copper coated iron wire: cut-off is 0.05-0.09% for 1-2mm, composition weight percentage: C directly, and Si is 0.1%～0.2%, and Mn is 0.25-0.35%; P < 0.02%; < 0.025%, all the other are the iron wire of Fe to S, and the volume percent that the control iron wire accounts for material is 5-40%;
Press ordinary method in half iron wire chrome-faced, second half iron wire copper coating; The chromium plating iron wire and the copper coated iron wire that form respectively; The thickness of coating is 100-500 μ m; The chromium plating iron wire that forms is suitable with copper coated iron wire length;
Ordinary method by cleaning ball production is respectively got rhizoid formation globular mixing mariages wire group with above-mentioned chromium plating iron wire and copper coated iron wire; Wire group's diameter is 10-15cm; Number of metal silk group is put into casting mold mo(u)ld bottom half die cavity; The tightness of wire group guarantees that by the volume percent decision that iron wire accounts for material wire group just in time piles casting mold; After deploying, the mo(u)ld top half of casting mold is placed on the mo(u)ld bottom half, molten iron pouring is waited in the mould assembling back that finishes;
The preparation of vermicular graphite iron material matrix: percentage composition: C is 3.3%～3.5% by weight, and Si is 2.9%～3.3%, and Mn is 0.1-0.4%, and Dy is 0.5-0.8%, and < 0.03%, < 0.025%, all the other prepare burden for the vermicular cast iron of Fe S P; Wherein part Si, Dy and Fe add with follow-up mode; The vermicular cast iron raw material is fused into molten iron in induction furnace, teeming temperature is 1420-1460 ℃; Before the cast, in casting ladle, add successively molten steel quality 0.6-0.8% 75 ferrosilicon nucleating agents and 0.4-0.6% contain Dy rare earth vermiculizer, adopt and pour the method following current and pour in the fire bag; In the rare earth vermiculizer, percentage composition Dy is 25% by weight, and silicon is 25%, and all the other are iron; Remaining Dy amount in the vermicular graphite iron material adopts the dysprosium iron that contains Dy50% to replenish;
Above-mentioned vermicular cast iron molten iron is poured into the dry sand casting mold that wire group is housed, and liquid metal surrounds chromium plating iron wire and copper coated iron wire, cooled and solidified then, form with the vermicular cast iron be base wherein be distributed with the material that wire is rolled into a ball.
It is following that the present invention compares the beneficial effect of prior art:
1, the iron wire self in the material of the present invention has suitable intensity and high toughness.The matrix of iron wire and vermicular cast iron all is an iron, so iron wire and vermicular cast iron be easy to combine, and forms good metallurgical binding.Like this, iron wire is distributed in the fragility vermicular cast iron, and material is had good enhancing toughening effect.
2, in the preparation process; When getting into the casting mold die cavity, molten iron contacts with iron wire; Cu and Cr in the iron wire overlay coating are fused to molten iron, and the Cu and the Cr reaction on the C in the molten iron, Si and iron wire surface form Cr3Si, CuC2 and Cr23C6 compound, promote that the C in the molten iron separates out with the form of carbide; Be distributed in the matrix, these reactants are higher than cementite hardness.This special compound that forms has further improved the antifriction quality of material.
3, Dy has anti-spheroidization of graphite effect, and the formation China ink of wriggling is had decisive action.The effect that in addition tissue of vermicular cast iron is had remarkable refinement has important effect for vermicular cast iron toughness reinforcing.C and Dy also can form C and Dy Compound D y3C simultaneously, are distributed in the raising that also helps the material antifriction quality in the matrix.
4, material of the present invention need not valuable REE, and principal element is brought into by iron wire, and the cost of material is low for iron wire, and preparation technology is easy, and production cost is low, and the alloy material performance of production is good, and is convenient to very much suitability for industrialized production.Be suitable for making many antifriction parts, like mechanical braking dish etc.
The performance of material of the present invention is seen table 1.
Description of drawings
The iron wire that Fig. 1 makes for the embodiment of the invention one strengthens the metallographic structure that contains dysprosium antifriction vermicular graphite iron material.
Fig. 1 can see at vermicular cast iron and combining well with iron wire.
Embodiment
Each embodiment is only with of the present invention the explaining of opposing below
, and weight percent wherein all can change weight g, kg or other weight unit into.Following iron wire is commercial, the coating self-control.
Embodiment one:
The preparation of chromium plating iron wire and copper coated iron wire:
Cut-off is 0.05% for 1mm, composition weight percentage: C directly, and Si is 0.1%, and Mn is 0.25%, and < 0.02%, < 0.025%, all the other are the iron wire of Fe to S to P, and the volume percent that the control iron wire accounts for material is 5%.
Press ordinary method in half iron wire chrome-faced, second half iron wire copper coating; The chromium plating iron wire and the copper coated iron wire that form respectively; The thickness of coating is 100 μ m; Two kinds of coating iron wire overall length are suitable.
Ordinary method by cleaning ball production is respectively got (the two rhizoids moulding simultaneously of rhizoid formation globular mixing mariages wire group with above-mentioned chromium plating iron wire and copper coated iron wire; Form mariages wire group; Moulding can or be claimed the method for steel wire lump by the cleaning ball of the usefulness that washes the dishes), wire group diameter is 15cm, and number of metal silk group is put into casting mold mo(u)ld bottom half die cavity; The tightness of wire group guarantees that by the volume percent decision that iron wire accounts for material wire group just in time piles casting mold; After deploying, the mo(u)ld top half of casting mold is placed on the mo(u)ld bottom half, molten iron pouring is waited in the mould assembling back that finishes;
The preparation of vermicular graphite iron material matrix: percentage composition: C is 3.3% by weight, and Si is 2.9%, and Mn is 0.1%, and Dy is 0.5 %, and < 0.03%, < 0.025%, all the other prepare burden for the vermicular cast iron of Fe S P; Wherein part Si, Dy and Fe add with follow-up mode; The vermicular cast iron raw material is fused into molten iron in induction furnace, teeming temperature is 1435-1440 ℃; Before the cast, in casting ladle, add successively molten steel quality 0.6% 75 ferrosilicon nucleating agents and 0.4% contain Dy rare earth vermiculizer, adopt and pour the method following current and pour in the fire bag; In the rare earth vermiculizer, percentage composition Dy is 25% by weight, and silicon is 25%, and all the other are iron; Remaining Dy amount in the vermicular graphite iron material adopts the dysprosium iron (wherein part iron is brought into by it) that contains Dy50% to replenish;
Above-mentioned vermicular cast iron molten iron is poured into the dry sand casting mold that wire group is housed, and liquid metal surrounds chromium plating iron wire and copper coated iron wire, cooled and solidified then, form with the vermicular cast iron be base wherein be distributed with the material that wire is rolled into a ball.
Embodiment two:
Vermicular graphite iron material matrix composition weight percentage: C is 3.5%, and Si is 3.3%, and Mn is 0.4%, and Dy is 0.8%, and < 0.03%, < 0.025%, all the other are Fe to S to P.
The weight percentage of iron wire composition is: C is 0.09%, and Si is 0.2%, and Mn is 0.35%, and < 0.02%, < 0.025%, all the other are Fe to S to P.The iron wire diameter is 2mm.The volume percent that the control iron wire accounts for material is 40%.
Get above-mentioned half iron wire chrome-faced, second half iron wire copper coating by ordinary method; The chromium plating iron wire and the copper coated iron wire that form respectively; The thickness of copper facing and chromium coating is 500 μ m, and two kinds of coating iron wire overall length are suitable.Press the ordinary method making of cleaning ball production and be with the mariages wire group of two kinds of wires mixing of coating, wire group diameter is 15cm.
In the preparation, what in casting ladle, add 0.8% the 75 ferrosilicon nucleating agents account for molten steel quality and 0.6% successively contains Dy rare earth vermiculizer, and all the other preparation processes are with embodiment one.
Embodiment three:
Vermicular graphite iron material matrix composition weight percentage: C is 3.4%, and Si is 3%, and Mn is 0.3%, and Dy is 0.7%, and < 0.03%, < 0.025%, all the other are Fe to S to P.
The weight percentage of iron wire composition is: C is 0.07%, and Si is 0.15%, and Mn is 0.3%, and < 0.02%, < 0.025%, all the other are Fe to S to P.Iron wire chrome-faced or copper.The iron wire diameter is 1.2mm.The volume percent that iron wire accounts for material is 20%.
Get above-mentioned half iron wire chrome-faced, second half iron wire copper coating by ordinary method; The chromium plating iron wire and the copper coated iron wire that form respectively; The thickness of copper facing and chromium coating is 200 μ m, and two kinds of coating iron wire overall length are suitable.Press the ordinary method making of cleaning ball production and be with the mariages wire group of two kinds of wires mixing of coating, wire group diameter is 12cm.
In the preparation, in casting ladle, add successively molten steel quality 0.7% 75 ferrosilicon nucleating agents and 0.5% contain Dy rare earth vermiculizer, all the other preparation processes are with embodiment one.
The comparative example four: proportioning raw materials is within the scope of the present invention instance not
Vermicular graphite iron material matrix composition weight percentage: C is 3%, and Si is 2.7%, and Mn is 0.05%, and Dy is 0.4%, and < 0.03%, < 0.025%, all the other are Fe to S to P.
Iron wire composition weight percentage is: C is 0.04%, and Si is 0.08%, and Mn is 0.2%, P<0.02%,
S<0.025%,All the other are Fe.The iron wire diameter is 0.8mm.The volume percent that iron wire accounts for material is 4%.
Also not copper facing of iron wire not chromium plating of surface.Press ordinary method system mariages (two strands of iron wires) the wire group that cleaning ball is produced, wire group diameter is 15cm.
The preparation process is with embodiment one.
The comparative example five: proportioning raw materials is within the scope of the present invention instance not
Vermicular graphite iron material matrix composition weight percentage: C is 3.7%, and Si is 4, and Mn is 0.5%, and Dy is 0.9%, and < 0.03%, < 0.025%, all the other are Fe to S to P.
The weight percentage of iron wire composition is: C is 0.1%, and Si is 0.3%, and Mn is 0.4%, and < 0.02%, < 0.025%, all the other are Fe to S to P.The iron wire diameter is 3mm.The volume percent that iron wire accounts for material is 45%.
Get all chromium plating of above-mentioned iron wire surface, the chromium plating iron wire of formation by ordinary method; The thickness of chromium coating is 600 μ m.Press ordinary method making mariages (two strands of chromium plating iron wires) the wire group that cleaning ball is produced, wire group diameter is 10cm.
The preparation process is with embodiment one.
Table 1
Visible by last table, C, Si, Mn increase in the chemical ingredients of vermicular cast iron and iron wire, are beneficial to the raising of material hardness.But too much, increase the fragility of body material.P and S increase, and increase the fragility of body material.
The increase of Dy not only is beneficial to the raising of hardness in the vermicular cast iron, and helps the toughness raising.But, too much cause the increase of Dy and C compound, reduce the toughness of material.
The increase of iron wire volume percent is beneficial to the raising of toughness of material.But too much, reduced the hardness of material, therefore also reduced the antifriction quality of material.
The thickness of copper facing and chromium coating increases, and is beneficial to the alloying of molten iron; Copper and chromium are difficult for fusing into molten iron in short-term, cause the waste of element but too much.
Claims (3)
1. antifriction vermicular graphite iron material, this material is a matrix with the vermicular cast iron, the wire group that in matrix, is distributing and forming by iron wire, used iron wire diameter is 1-2mm, and the diameter of wire group is 10-15cm, and the volume percent that iron wire accounts for material is 5-40%;
The following chemical components in percentage by weight of vermicular cast iron matrix: C is 3.3%～3.5%, and Si is 2.9%～3.3%, and Mn is 0.1-0.4%, and Dy is 0.5-0.8%, and < 0.03%, < 0.025%, all the other are Fe to S to P;
The following chemical components in percentage by weight of iron wire is: C is 0.05-0.09%, and Si is 0.1%～0.2%, and Mn is 0.25-0.35%, and < 0.02%, < 0.025%, all the other are Fe to S to P.
2. antifriction vermicular graphite iron material according to claim 1 is characterized in that: the CuC that also is distributed with in the matrix
2, Cr
3Si and Cr
23C
6Particle.
3. the preparation method of antifriction vermicular graphite iron material, it is characterized in that: it may further comprise the steps:
The preparation of chromium plating iron wire and copper coated iron wire: cut-off is 0.05-0.09% for 1-2mm, composition weight percentage: C directly, and Si is 0.1%～0.2%, and Mn is 0.25-0.35%; P < 0.02%; < 0.025%, all the other are the iron wire of Fe to S, and the volume percent that the control iron wire accounts for material is 5-40%;
Press ordinary method in half iron wire chrome-faced, second half iron wire copper coating; The chromium plating iron wire and the copper coated iron wire that form respectively; The thickness of coating is 100-500 μ m; The chromium plating iron wire that forms is suitable with copper coated iron wire length;
Ordinary method by cleaning ball production is respectively got rhizoid formation globular mixing mariages wire group with above-mentioned chromium plating iron wire and copper coated iron wire; Wire group's diameter is 10-15cm; Number of metal silk group is put into casting mold mo(u)ld bottom half die cavity; The tightness of wire group guarantees that by the volume percent decision that iron wire accounts for material wire group just in time piles casting mold; After deploying, the mo(u)ld top half of casting mold is placed on the mo(u)ld bottom half, molten iron pouring is waited in the mould assembling back that finishes;
The preparation of vermicular graphite iron material matrix: percentage composition: C is 3.3%～3.5% by weight, and Si is 2.9%～3.3%, and Mn is 0.1-0.4%, and Dy is 0.5-0.8%, and < 0.03%, < 0.025%, all the other prepare burden for the vermicular cast iron of Fe S P; Wherein part Si, Dy and Fe add with follow-up mode; The vermicular cast iron raw material is fused into molten iron in induction furnace, teeming temperature is 1420-1460 ℃; Before the cast, in casting ladle, add successively molten steel quality 0.6-0.8% 75 ferrosilicon nucleating agents and 0.4-0.6% contain Dy rare earth vermiculizer, adopt and pour the method following current and pour in the fire bag; In the rare earth vermiculizer, percentage composition Dy is 25% by weight, and silicon is 25%, and all the other are iron; Remaining Dy amount in the vermicular graphite iron material adopts the dysprosium iron that contains Dy50% to replenish;
Above-mentioned vermicular cast iron molten iron is poured into the dry sand casting mold that wire group is housed, and liquid metal surrounds chromium plating iron wire and copper coated iron wire, cooled and solidified then, form with the vermicular cast iron be base wherein be distributed with the material that wire is rolled into a ball.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2611622C1 (en) * | 2016-01-12 | 2017-02-28 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский государственный университет путей сообщения" (МИИТ) | High-strength cast iron for heat-treated cast case parts |
| RU2611624C1 (en) * | 2016-01-12 | 2017-02-28 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский государственный университет путей сообщения" (МИИТ) | High-strength alloyed antifriction cast iron |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110904381B (en) * | 2019-12-30 | 2021-08-06 | 江西久旺汽车配件制造有限公司 | Vermicular graphite cast iron material and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0335692A1 (en) * | 1988-04-01 | 1989-10-04 | Ube Industries, Ltd. | Fiber-reinforced metal composite |
| CN101314839A (en) * | 2008-06-13 | 2008-12-03 | 哈尔滨工业大学 | Reinforcement method for continuous filament reinforced metallic matrix composite |
| CN101705444A (en) * | 2009-11-09 | 2010-05-12 | 西安建筑科技大学 | Preparation process of high manganese steel based composite material |
-
2011
- 2011-01-14 CN CN201110007472A patent/CN102181810B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0335692A1 (en) * | 1988-04-01 | 1989-10-04 | Ube Industries, Ltd. | Fiber-reinforced metal composite |
| CN101314839A (en) * | 2008-06-13 | 2008-12-03 | 哈尔滨工业大学 | Reinforcement method for continuous filament reinforced metallic matrix composite |
| CN101705444A (en) * | 2009-11-09 | 2010-05-12 | 西安建筑科技大学 | Preparation process of high manganese steel based composite material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2611622C1 (en) * | 2016-01-12 | 2017-02-28 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский государственный университет путей сообщения" (МИИТ) | High-strength cast iron for heat-treated cast case parts |
| RU2611624C1 (en) * | 2016-01-12 | 2017-02-28 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский государственный университет путей сообщения" (МИИТ) | High-strength alloyed antifriction cast iron |
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Address after: 214135 Jiangsu city of Wuxi province innovation building No. 97 Wuxi district two Linghu Avenue South Building Room 101 Patentee after: Nanjing University of Information Science and Technology Address before: 210044 Nanjing City, Pukou Province, Nanjing Road, No. 219, No. six, No. Patentee before: Nanjing University of Information Science and Technology |
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Effective date of registration: 20151026 Address after: 211600 No. 13, health Road, Jinhu County, Jiangsu, Huaian Patentee after: Jinhu Zhongbo IOT Technology Co., Ltd. Address before: 214135 Jiangsu city of Wuxi province innovation building No. 97 Wuxi district two Linghu Avenue South Building Room 101 Patentee before: Nanjing University of Information Science and Technology |
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