CN102071382B - Corrosion-resistant white cast iron material and preparation method thereof - Google Patents
Corrosion-resistant white cast iron material and preparation method thereof Download PDFInfo
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- CN102071382B CN102071382B CN2011100074779A CN201110007477A CN102071382B CN 102071382 B CN102071382 B CN 102071382B CN 2011100074779 A CN2011100074779 A CN 2011100074779A CN 201110007477 A CN201110007477 A CN 201110007477A CN 102071382 B CN102071382 B CN 102071382B
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Abstract
The invention provides a corrosion-resistant white cast iron material and a preparation method thereof. The material has good properties. The preparation method is simple in process, low in production cost and suitable for industrial production. In the corrosion-resistant white cast iron material, white cast iron is taken as a matrix, and wire wool formed by iron wires and medium carbon steel wires is distributed in the matrix, wherein the diameters of the iron wires and the medium carbon steel wires are 1 to 2mm; the iron wires and the medium carbon steel wires account for 5 to 40 volume percent of the material; and the diameter of the wire wool is 10 to 15cm.
Description
Technical field
The invention belongs to metal material field, relate to a kind of anti-corrosion White Cast Iron Material and preparation method thereof.
Background technology
In metal material field, corrosiron receives generally as the low-cost corrosion-resistant material always and paying attention to.
CN201010150314.1 number application discloses a kind of rare-earth and high content of silicon pyrolic alloy cast iron, and it comprises: Fe, Cr, Ni, Mo, Cu, Si, Mn, C, S, P and micro-Nb, V, Zr, N and Re, and melting forms in electric furnace; Its alloy ingredient (by weight percentage) is formed: Cr:0.50～18.80, Ni:0.10～21.50, Mo:0.15～3.80, Cu:0.20～3.50, Si:2.50～18.50, Mn:0.60～1.20, C:0.80～3.20, S:0.02～0.15, P:0.10～0.20, Re:0.50～3.20, Nb, V, Zr, N: an amount of, Fe: surplus.
CN201010177246.8 number application discloses a kind of anti-corrosion medium-Si, Mo nickel-cobalt nodular cast iron alloy, this alloy by weight percentage, it comprises: C:2.0-3.5%; Si:4.0-6.5%; Mo:0.6-1.5%; P:0.01-0.05%; S:0.01-0.03%; Cr:0.05-0.1%; Ni:0.1-0.3%; Co:0.05-0.1%; Fe with surplus.
Although more than two kinds of cast iron used many rare your elements such as Mo, Ni, V etc., used a large amount of silicon, 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 anti-corrosion White Cast Iron Material is provided, and this material has good performance.
Another object of the present invention provides a kind of preparation method of anti-corrosion White Cast 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 anti-corrosion White Cast Iron Material; This material is matrix with the white cast iron; The wire group that is forming by iron wire and bullet wire in matrix, distributing, used iron wire and bullet wire diameter are 1-2mm, and the overall length of iron wire and bullet wire is suitable in the material; The diameter of wire group is 10-15cm, and the volume percent that iron wire and bullet wire account for material altogether is 5-40%;
The following chemical components in percentage by weight of white cast iron matrix: C is 2.6%～2.8%, and Si is 1.6%～2.2%, and Mn is 0.5-0.7%, and Y is 0.5-2%, and < 0.08%, < 0.25%, all the other are Fe to S to P.
The following chemical components in percentage by weight of bullet wire is: C is 0.3%～0.53%, and Si is 0.2%～0.25%, and Mn is 0.5-0.65%, and < 0.02%, < 0.02%, all the other are Fe to S to P.
The following chemical components in percentage by weight of iron wire is: C is 0.04-0.06%, and Si is 0.2～0.3%, and Mn is 0.25-0.35%, and < 0.02%, < 0.025%, all the other are Fe to S to P.
Compound C o3C, B4C, Fe3B particle are also distributing in the said matrix.
A kind of preparation method of anti-corrosion White Cast Iron Material is characterized in that: it may further comprise the steps:
The preparation of cobalt plating bullet wire and boronising iron wire: cut-off directly be 1-2mm, composition weight percentage: C 0.3%～0.53%, Si 0.2%～0.25%, Mn 0.5-0.65%, P 0.02%, S 0.02%, all the other are the bullet wire of Fe, by ordinary method at its surperficial cobalt plating; The thickness of cobalt plating layer is the 50-500 micron;
Cut-off directly is 1-2mm, and composition weight percentage: C is 0.04-0.06%, and Si is 0.2～0.3%; Mn is 0.25-0.35%; < 0.02%, < 0.025%, all the other are the iron wire of Fe to S to P; The overall length of the iron wire of getting and bullet wire suitable, the volume percent that control iron wire and bullet wire account for material altogether is 5-40%; At its surface boronizing, the thickness of boride layer is the 50-500 micron to iron wire by ordinary method; The cobalt plating bullet wire that forms is suitable with the overall length of boronising iron wire;
The ordinary method of pressing cleaning ball production forms globular mixing mariages wire group with above-mentioned cobalt plating bullet wire and boronising 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 and bullet wire account 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 White Cast Iron Material matrix: percentage composition: C is 2.6%～2.8% by weight, Si is 1.6%～2.2%, Mn be 0.5-0.7%, Y be 0.5-2%, P 0.08%, S 0.25%, all the other prepare burden for Fe's; White Cast Iron Material melts in induction furnace, and temperature of fusion is 1460-1510 ℃;
Above-mentioned white cast iron molten iron is poured into the dry sand casting mold that wire group is housed; Liquid molten iron surrounds cobalt plating bullet wire and boronising iron wire, cooled and solidified then, form with the white 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, iron wire and the bullet wire self selected for use in the material of the present invention have suitable intensity and high toughness.In addition, bullet wire has good corrosion resisting property.The matrix of iron wire and steel wire and white pig iron all is an iron, so wire and white pig iron is easy to combine, and forms good metallurgical binding.Like this, iron wire and bullet wire are distributed in the fragility white pig iron, material is had good high temperature strengthen and toughening effect.
2, white pig iron contains a large amount of cementites, so hardness is high, has good corrosion resisting property.The cobalt that gets into casting mold die cavity and wire surface when molten iron is with after boron contacts; The cobalt and the boron of wire surface are fused to molten iron; The element reaction of C in the molten iron and Fe and wire surface forms special compound Co3C, B4C, Fe3B, and compound is tiny granular being distributed in the matrix.The cobalt of solid solution in cast iron can further improve the resistance to corrosion of material.P, S are impurity in the material of the present invention, are controlled at the scope of permission.
3, the Y in the material has stabilization to the cementite in the tissue of white pig iron, and the effect that makes being evenly distributed of cementite is arranged, and can improve the solidity to corrosion of white pig iron.C and Y also can form the Y2C compound in addition, help the raising of material mechanical performance.The present invention compares prior art, has reduced the usage quantity of silicon, has improved the intensity of material.
4, cast iron materials of the present invention need not valuable REE, and the cost of material is low, and preparation technology is easy, and production cost is low, and steel wire and compound strengthen white pig iron, and the alloy material performance of production is good, and is convenient to very much suitability for industrialized production.
Cast iron materials performance of the present invention is seen table 1.
Description of drawings
The metallographic structure of the anti-corrosion White Cast Iron Material that Fig. 1 makes for the embodiment of the invention one.
Fig. 1 can see in spoken parts in traditional operas casting and wire interface combination good.
Embodiment
Below each embodiment only with of the present invention the explaining of opposing, weight percent wherein all can change weight g, kg or other weight unit into.Following wire is commercial, cobalt plating layer and boride layer self manufacture
.
Embodiment one:
The preparation of cobalt plating bullet wire and boronising iron wire:
The bullet wire component content is: C is 0.3%, and Si is 0.2%, and Mn is 0.5%, and < 0.02%, < 0.02%, all the other are Fe to S to P.The bullet wire diameter is 1mm.
The iron wire component content is: C is 0.04%, and Si is 0.2%, and Mn is 0.25%, and < 0.02%, < 0.025%, all the other are Fe to S to P.The iron wire diameter is 1mm.Institute's iron wire of getting is suitable with the bullet wire overall length, and controlling the volume percent that iron wire and two kinds of wires of bullet wire account for material altogether in the preparation process is 5%.
Bullet wire is pressed ordinary method at surperficial cobalt plating, 50 microns of thickness.Iron wire is by the ordinary method surface boronizing, and thickness is 50 microns.The cobalt plating bullet wire that forms is suitable with the two overall length of boronising iron wire.
The preparation process is following:
Get above-mentioned ready cobalt plating bullet wire and boronising iron wire; (cobalt plating bullet wire and boronising iron wire are respectively got a rhizoid with boronising iron wire formation globular mixing mariages wire group with above-mentioned cobalt plating bullet wire by ordinary method that cleaning ball is produced; Two rhizoids are shaped simultaneously, form mariages wire group, and moulding can or be claimed the method for steel wire lump by the cleaning ball of the usefulness that washes the dishes); Wire group's diameter is 15cm; Number of metal silk group is put into casting mold mo(u)ld bottom half die cavity, and the tightness of wire group guarantees that by the volume percent decision that iron wire and bullet wire account 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 White Cast Iron Material matrix: percentage composition: C is 2.6% by weight, and Si is 1.6%, and Mn is 0.5%; Y is 0.5%, and < 0.08%, S < 0.25% for P; All the other are prepared burden for Fe, and White Cast Iron Material melts in induction furnace, and temperature of fusion is 1485-1495 ℃;
Above-mentioned white cast iron molten iron is poured into the dry sand casting mold of the wire group that cobalt plating bullet wire and the formation of boronising iron wire are housed; Liquid molten iron surrounds cobalt plating bullet wire and boronising iron wire, cooled and solidified then, form with the white cast iron be base wherein be distributed with the material that wire is rolled into a ball.
Embodiment two:
The preparation of cobalt plating bullet wire and boronising iron wire:
Bullet wire composition weight percentage is: C is 0.53%, and Si is 0.25%, and Mn is 0.65%, and < 0.02%, < 0.02%, all the other are Fe to S to P, and diameter is 1.5mm.
Iron wire composition weight percentage is: C is 0.06%, and Si is 0.3%, and Mn is 0.35%, and < 0.02%, < 0.025%, all the other are Fe to S to P, and diameter is 2mm.Institute's iron wire of getting is suitable with the bullet wire overall length, and controlling the volume percent that iron wire and two kinds of wires of bullet wire account for material in the preparation process is 40%.
Bullet wire surface cobalt plating, 500 microns of thickness.The iron wire surface boronizing, 500 microns of thickness.Press the ordinary method that cleaning ball is produced, above-mentioned two kinds of band coated metal silks are respectively got one, the mariages blended wire group of formation, metal group diameter is 10cm.
The White Cast Iron Material matrix is by weight percentage: C is 2.8%, and Si is 2.2%, and Mn is 0.7%, and Y is 2%, and < 0.08%, < 0.25%, all the other prepare burden for Fe S P;
The preparation process is with embodiment one.
Embodiment three:
The preparation of cobalt plating bullet wire and boronising iron wire:
Bullet wire composition weight percentage is: C is 0.4%, and Si is 0.21%, and Mn is 0.55%, and < 0.02%, < 0.02%, all the other are Fe to S to P, and diameter is 1.5mm.
Iron wire composition weight percentage is: C is 0.045%, and Si is 0.25%, and Mn is 0.3%, and < 0.02%, < 0.025%, all the other are Fe to S to P, and diameter is 1.5mm.Institute's iron wire of getting is suitable with the bullet wire overall length, and controlling the volume percent that iron wire and two kinds of wires of bullet wire account for material in the preparation process is 30%.
Bullet wire surface cobalt plating, 200 microns of thickness of coating.The iron wire surface boronizing, 200 microns of boride layer thickness.Press the ordinary method that cleaning ball is produced, the wire of above-mentioned two kinds of band coating is respectively got one, the mariages blended wire group of formation, metal group diameter is 10cm.
The White Cast Iron Material matrix is by weight percentage: C is 2.7%, and Si is 1.9%, and Mn is 0.55%, and Y is 0.8%, and < 0.08%, < 0.25%, all the other prepare burden for Fe S P.
The preparation process is with embodiment one.
The comparative example four: proportioning raw materials is within the scope of the present invention instance not
The preparation of cobalt plating bullet wire and boronising iron wire:
Bullet wire composition weight percentage is: C is 0.2%, and Si is 0.1%, and Mn is 0.4%, and < 0.02%, < 0.02%, all the other are Fe to S to P.
Iron wire composition weight percentage is: C is 0.03%, and Si is 0.1%, and Mn is 0.2%, and < 0.02%, < 0.025%, all the other are Fe to S to P.Institute's iron wire of getting is suitable with the bullet wire overall length, and controlling the volume percent that iron wire and two kinds of wires of bullet wire account for material in the preparation process is 3%.
Two kinds of wire diameters are 1mm.The bullet wire surface is cobalt plating not.600 microns of iron wire surface boronizings.Press the ordinary method that cleaning ball is produced, above-mentioned two kinds of wires (bullet wire and boronising iron wire) are respectively got one, the mariages blended wire group of formation, metal group diameter is 10cm.
The White Cast Iron Material matrix is by weight percentage: C is 2.1%, and Si is 1.3%, and Mn is 0.3%, and Y is 0.3%, and < 0.08%, < 0.25%, all the other prepare burden for Fe S P.
The preparation process is with embodiment one.
The comparative example five: proportioning raw materials is within the scope of the present invention instance not
The preparation of cobalt plating bullet wire and boronising iron wire:
Bullet wire composition weight percentage is: C is 0.7%, and Si is 0.4%, and Mn is 0.7%, and < 0.02%, < 0.02%, all the other are Fe to S to P.
Iron wire composition weight percentage is: C is 0.08%, and Si is 0.5%, and Mn is 0.4%, and < 0.02%, < 0.025%, all the other are Fe to S to P.Institute's iron wire of getting is suitable with the bullet wire overall length, and controlling the volume percent that iron wire and two kinds of wires of bullet wire account for material in the preparation process is 43%.
Two kinds of wire diameters are 3mm.Bullet wire surface cobalt plating, 600 microns of cobalt plating layer thicknesses.Iron wire not boronising of surface.Press the ordinary method that cleaning ball is produced, above-mentioned two kinds of wires (iron wire and cobalt plating bullet wire) are respectively got one, the mariages blended wire group of formation, metal group diameter is 10cm.
The White Cast Iron Material matrix is by weight percentage: C is 3%, and Si is 3%, and Mn is 0.9%, and Y is 3%, and < 0.08%, < 0.25%, all the other are Fe to S to P.
The preparation process is with embodiment one.
Table 1
Visible by last table, Si increase in the chemical ingredients of white pig iron and bullet wire is beneficial to the corrosion proof raising of material in the material of the present invention.But too much, can reduce the toughness of body material.C, Mn increase, and can improve the stability of carbide, are beneficial to corrosion proof raising.But too much, can destroy the stability of carbide.P and S increase, and can reduce the toughness of body material, reduce the mechanical property of material.
The increase of Y not only is beneficial to corrosion proof raising in the white pig iron, and helps the toughness raising.But, too much cause the increase of Y and C compound, to such an extent as to reduce the toughness solidity to corrosion of material.
The increase of bullet wire volume percent is beneficial to the raising of the strength of materials.The increase of bullet wire volume percent in addition, cobalt also improves, and is beneficial to the corrosion proof raising of material.But too much, can cause the coating imperfection of white pig iron, reduce the intensity of material, therefore also reduce the solidity to corrosion of material bullet wire.Reduction like product 4,5 performances.
Claims (1)
1. the preparation method of an anti-corrosion White Cast Iron Material, it is characterized in that: it may further comprise the steps:
The preparation of cobalt plating bullet wire and boronising iron wire: cut-off directly be 1-2mm, composition weight percentage: C 0.3%～0.53%, Si 0.2%～0.25%, Mn 0.5-0.65%, P 0.02%, S 0.02%, all the other are the bullet wire of Fe, by ordinary method at its surperficial cobalt plating; The thickness of cobalt plating layer is the 50-500 micron;
Cut-off directly is 1-2mm, and composition weight percentage: C is 0.04-0.06%, and Si is 0.2～0.3%; Mn is 0.25-0.35%; < 0.02%, < 0.025%, all the other are the iron wire of Fe to S to P; The overall length of the iron wire of getting and bullet wire suitable, the volume percent that control iron wire and bullet wire account for material altogether is 5-40%; At its surface boronizing, the thickness of boride layer is the 50-500 micron to iron wire by ordinary method; The cobalt plating bullet wire that forms is suitable with the overall length of boronising iron wire;
The ordinary method of pressing cleaning ball production forms globular mixing mariages wire group with above-mentioned cobalt plating bullet wire and boronising 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 and bullet wire account 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 White Cast Iron Material matrix: percentage composition: C is 2.6%～2.8% by weight, Si is 1.6%～2.2%, Mn be 0.5-0.7%, Y be 0.5-2%, P 0.08%, S 0.25%, all the other prepare burden for Fe's; White Cast Iron Material melts in induction furnace, and temperature of fusion is 1460-1510 ℃;
Above-mentioned white cast iron molten iron is poured into the dry sand casting mold that wire group is housed; Liquid molten iron surrounds cobalt plating bullet wire and boronising iron wire, cooled and solidified then, form with the white cast iron be base wherein be distributed with the material that wire is rolled into a ball.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB727061A (en) * | 1951-08-20 | 1955-03-30 | Mond Nickel Co Ltd | Improvements in white cast iron |
| SU954481A1 (en) * | 1981-01-12 | 1982-08-30 | Гомельский Филиал Белорусского Ордена Трудового Красного Знамени Политехнического Института | Wear-resistant white iron |
| CN86106682A (en) * | 1986-10-11 | 1988-04-20 | 机械工业部沈阳铸造研究所 | White cast-iron and cast steel bimetal composite casting |
| CN101463446A (en) * | 2008-12-22 | 2009-06-24 | 南车戚墅堰机车车辆工艺研究所有限公司 | Low-alloy white cast iron |
| CN101812627A (en) * | 2010-04-29 | 2010-08-25 | 天津水泥工业设计研究院有限公司 | High-tenacity wear-resistant white iron and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5159007A (en) * | 1974-11-21 | 1976-05-22 | Komatsu Mfg Co Ltd | TAISHOKUTAIMA MOSEI HAKUSEN CHUTETSU |
| AU2003902535A0 (en) * | 2003-05-22 | 2003-06-05 | Weir Warman Ltd | Wear resistant cast iron |
-
2011
- 2011-01-14 CN CN2011100074779A patent/CN102071382B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB727061A (en) * | 1951-08-20 | 1955-03-30 | Mond Nickel Co Ltd | Improvements in white cast iron |
| SU954481A1 (en) * | 1981-01-12 | 1982-08-30 | Гомельский Филиал Белорусского Ордена Трудового Красного Знамени Политехнического Института | Wear-resistant white iron |
| CN86106682A (en) * | 1986-10-11 | 1988-04-20 | 机械工业部沈阳铸造研究所 | White cast-iron and cast steel bimetal composite casting |
| CN101463446A (en) * | 2008-12-22 | 2009-06-24 | 南车戚墅堰机车车辆工艺研究所有限公司 | Low-alloy white cast iron |
| CN101812627A (en) * | 2010-04-29 | 2010-08-25 | 天津水泥工业设计研究院有限公司 | High-tenacity wear-resistant white iron and preparation method thereof |
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