CN102051545B - Wear-resistant and heat-resistant mottled cast iron material and preparation method thereof - Google Patents
Wear-resistant and heat-resistant mottled cast iron material and preparation method thereof Download PDFInfo
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- CN102051545B CN102051545B CN2011100074586A CN201110007458A CN102051545B CN 102051545 B CN102051545 B CN 102051545B CN 2011100074586 A CN2011100074586 A CN 2011100074586A CN 201110007458 A CN201110007458 A CN 201110007458A CN 102051545 B CN102051545 B CN 102051545B
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Abstract
The invention provides a wear-resistant and heat-resistant mottled cast iron material and a preparation method thereof. The wear-resistant and heat-resistant mottled cast iron material has good performance; and the preparation method is simple in process, low in production cost and suitable for industrial production. Mottled cast iron is utilized as a substrate for the wear-resistant and heat-resistant mottled cast iron material, wherein metal wire clusters formed by iron wires are distributed in the substrate; the diameter of the iron wires is 0.2-2mm; 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 antiwear heat resisting mottled cast iron material and preparation method thereof.
Background technology
In metal material field, antiwear heat resisting cast iron receives generally as low-cost wear heat-resistant material always and paying attention to.
Zhang Shangang etc. have studied the design and the preparation of the wear-resistant mottled cast iron of low-alloy in 2003 the 2nd phases of foundry engieering.The main chemical compositions of test materials is being: 2.5%～3.5% C; 1.0%～2.0% Si; 0.5%～1.5% Mn; 0.5%-2.0% (Co+Cu); Less than 1.0% Cr, Mo.But mottled iron mainly is made up of cementite, though cementite is hard crisp.The toughness of material is low.Be unfavorable for the raising of material wear-resistant resistance toheat.
CN200610163305.X number application discloses the plain body heat resisting iron of high silicon iron of a kind of hot strength and oxidation-resistance improvement, comprising: the Cr of the Mo of the Mn of the C of 2.5-3.8wt%, the Si of 5.0-7.0wt%, 0.2-0.8wt%, 0.05wt% or P still less, 0.02wt% or S still less, 0.5-1.2wt%, 0.1wt% or Co still less, 0.5wt% or V still less, 0.01-0.1wt%, 0.05wt% or Sb still less and surplus Fe.Although this cast iron has used many rare your elements such as Mo, Co, 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 antiwear heat resisting mottled cast iron material is provided, and this material has good performance.
Another object of the present invention provides a kind of antiwear heat resisting mottled cast iron preparation methods, 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 antiwear heat resisting mottled cast iron material; This material is a matrix with the mottled cast iron, the wire group that in matrix, is distributing and forming by iron wire, and used iron wire diameter is 0.2-2mm; 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 mottled cast iron matrix: C is 2.6%～3%, and Si is 2.1%～2.4%, and Mn is 0.3-0.4%, and Gd is 0.5-1%, and < 0.08%, < 0.25%, all the other are Fe to S to P;
The following chemical components in percentage by weight of iron wire is: C is 0.08-0.12%, and Si is 0.3%～0.5%, and Mn is 0.3-0.50%, and < 0.02%, < 0.025%, all the other are Fe to S to P.
Also be distributed with Compound C o3C, Co2Si, Cr3Si and Cr23C6 particle in the matrix.
A kind of heat-resisting mottled cast iron preparation methods, it is characterized in that: it may further comprise the steps:
The preparation of chromium plating iron wire and cobalt plating iron wire: cut-off is 0.08-0.12% for 1-2mm, composition weight percentage: C directly, and Si is 0.3%～0.5%, and Mn is 0.3-0.50%; 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%; In half iron wire surface chromium plating respectively, second half iron wire surface cobalt plating forms chromium plating iron wire and cobalt plating iron wire respectively by ordinary method; The thickness of coating is the 100-500 micron,
Ordinary method by cleaning ball production is respectively got rhizoid formation globular mixing mariages wire group with above-mentioned chromium plating iron wire and cobalt plating 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 mottled cast iron material matrix: percentage composition C is 2.6%～3% by weight, and Si is 2.1%～2.4%, and Mn is 0.3-0.4%, and Gd is 0.5-1%, and < 0.08%, < 0.25%, all the other prepare burden for the mottled cast iron raw material of Fe S P; The mottled cast iron raw material melts in induction furnace, forms liquid molten iron, and temperature of fusion is 1460-1490 ℃;
Above-mentioned mottled cast iron molten iron is poured into the dry sand casting mold that wire group is housed, and liquid molten iron surrounds chromium plating iron wire and cobalt plating iron wire, cooled and solidified then, form with the mottled 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 self has suitable intensity and high toughness in the material of the present invention.The matrix of iron wire and mottled iron all is an iron.Therefore iron wire and mottled iron are easy to combine, and form good metallurgical binding.Like this, iron wire is distributed in the fragility mottled iron, and material is had good enhancing toughening effect.
2, when getting into the casting mold die cavity, molten iron contacts with iron wire; The Co and the Cr on iron wire surface are fused to molten iron; The Co and the Cr reaction on the C in the molten iron, Si and iron wire surface form Co2Si, Cr3Si, Co3C and Cr23C6; Promote the C in the molten iron to separate out with the form of carbide, these reactants are higher than cementite hardness.This special compound that forms has further improved the antiwear heat resisting property of material.
3, Gd has the effect of remarkable refinement to the tissue of mottled iron, for mottled iron toughness reinforcing important effect is arranged.C and Gd also can form C and Gd compound Gd2C in addition, are distributed in also to help the stable on heating raising of material wear-resistant in the matrix.P, the S impurity in being in the material of the present invention is controlled at the scope of permission.
4, material of the present invention is without noble element, and main alloy element iron wire is again brought into, 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.
Material property of the present invention is seen table 1.
Description of drawings
The metallographic structure of the antiwear heat resisting mottled cast iron material that Fig. 1 makes for the embodiment of the invention one.
Fig. 1 can see at mottled cast iron and combining well with iron wire.
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 iron wire is commercial, the coating self-control.
Embodiment one:
The preparation of chromium plating iron wire and cobalt plating iron wire:
Cut-off is that C is 0.08% for 1mm, composition directly, and Si is 0.3%, and Mn is 0.3%, and < 0.02%, < 0.025%, all the other are the iron wire of Fe to S to P.The volume percent that the control iron wire accounts for material is 5%.
In half iron wire surface chromium plating respectively, second half iron wire surface cobalt plating forms suitable chromium plating iron wire of length and cobalt plating iron wire respectively by ordinary method; The thickness of coating is 100 microns;
By the ordinary method of cleaning ball production above-mentioned chromium plating iron wire and cobalt plating iron wire respectively being got a rhizoid forms globular mixing mariages wire group (two rhizoids is shaped simultaneously; Form mariages wire group; Moulding can be made by the cleaning ball of the usefulness that washes the dishes or the method for title steel wire lump), 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 mottled cast iron material matrix: percentage composition C is 2.6% by weight, and Si is 2.1%, and Mn is 0.3%, and Gd is 0.5%, and < 0.08%, < 0.25%, all the other prepare burden for the mottled cast iron raw material of Fe S P; The mottled cast iron raw material melts in induction furnace, and temperature of fusion is 1475-1485 ℃;
Above-mentioned mottled cast iron molten iron is poured into the dry sand casting mold that wire group is housed, and liquid molten iron surrounds chromium plating iron wire and cobalt plating iron wire, cooled and solidified then, form with the mottled cast iron be base wherein be distributed with the material that wire is rolled into a ball.
Embodiment two:
Mottled cast iron material matrix composition percentage composition: C by weight is 3%, and Si is 2.4%, and Mn is 0.4%, and Gd is 1%, and < 0.08%, < 0.25%, all the other prepare burden for Fe S P.
The iron wire composition is that C is 0.12%, and Si is 0.5%, and Mn is 0.50%, 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 surface chromium plating respectively by ordinary method, second half iron wire surface cobalt plating forms suitable chromium plating iron wire of length and cobalt plating iron wire respectively; The thickness of coating is 500 microns.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.
The preparation process is with embodiment one.
Embodiment three:
Mottled cast iron material matrix composition percentage composition: C by weight is 2.8%, and Si is 2.2%, and Mn is 0.35%, and Gd is 0.8%, and < 0.08%, < 0.25%, all the other prepare burden for Fe S P.
The iron wire composition is that C is 0.09%, and Si is 0.4%, and Mn is 0.4%, and < 0.02%, < 0.025%, all the other are Fe to S to P.The iron wire diameter is 1.2mm.The volume percent that iron wire accounts for material is 3%.
Get above-mentioned half iron wire surface chromium plating respectively by ordinary method, second half iron wire surface cobalt plating forms suitable chromium plating iron wire of length and cobalt plating iron wire respectively; The thickness of coating is 300 microns.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.
The preparation process is with embodiment one.
The comparative example four: proportioning raw materials is within the scope of the present invention instance not
Mottled cast iron material matrix composition percentage composition: C by weight is 2.3%, and Si is 1%, and Mn is 0.1%, and Gd is 0.1%, and < 0.08%, < 0.25%, all the other prepare burden for Fe S P.
The iron wire composition is that C is 0.02%, and Si is 0.2%, and Mn is 0.2%, and < 0.02%, < 0.025%, all the other are Fe to S to P.The iron wire diameter is 0.8mm.The volume percent that iron wire accounts for material is 4%.The iron wire surface is cobalt plating not, also not chromium plating.Press ordinary method making mariages (two strands of iron wires) the wire group that cleaning ball is produced, wire group diameter is 12cm.
The preparation process is with embodiment one.
The comparative example five: proportioning raw materials is within the scope of the present invention instance not
Mottled cast iron material matrix composition percentage composition: C by weight is 4%, and Si is 2.8%, and Mn is 0.5%, and Gd is 2%, and < 0.08%, < 0.25%, all the other prepare burden for Fe S P.
The iron wire composition is that C is 0.2%, and Si is 0.6%, and Mn is 0.6%, 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 above-mentioned half iron wire surface chromium plating respectively by ordinary method, second half iron wire surface cobalt plating forms chromium plating iron wire and cobalt plating iron wire respectively; The thickness of coating is 600 microns.Press two kinds of mariages wire groups that are with the wire mixing of coating of ordinary method making that cleaning ball is produced, wire group diameter is 12cm.
The preparation process is with embodiment one.
Table 1
Visible by last table, C, Si, Mn increase in the chemical ingredients of mottled iron and iron wire is beneficial to the raising of material hardness in the material of the present invention.But too much, can reduce the fragility of body material.P and S increase, and also can reduce the toughness of body material.
The increase of Gd not only is beneficial to the raising of hardness in the mottled iron of the present invention, and helps the toughness raising.But, too much cause the increase of Gd 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 antiwear heat resisting property of material.
The thickness of cobalt plating and chromium coating increases in the material, is beneficial to the alloying of molten iron, can improve the antiwear heat resisting property of material; Cobalt and chromium are difficult for fusing into molten iron in short-term, cause the waste of element but too much.
Claims (1)
1. heat-resisting mottled cast iron preparation methods, it is characterized in that: it may further comprise the steps:
The preparation of chromium plating iron wire and cobalt plating iron wire: cut-off is 0.08-0.12% for 1-2mm, composition weight percentage: C directly, and Si is 0.3%～0.5%, and Mn is 0.3-0.50%; 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%; In half iron wire surface chromium plating respectively, second half iron wire surface cobalt plating forms chromium plating iron wire and cobalt plating iron wire respectively by ordinary method; The thickness of coating is the 100-500 micron,
Ordinary method by cleaning ball production is respectively got rhizoid formation globular mixing mariages wire group with above-mentioned chromium plating iron wire and cobalt plating 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 mottled cast iron material matrix: percentage composition C is 2.6%～3% by weight, and Si is 2.1%～2.4%, and Mn is 0.3-0.4%, and Gd is 0.5-1%, and < 0.08%, < 0.25%, all the other prepare burden for the mottled cast iron raw material of Fe S P; The mottled cast iron raw material melts in induction furnace, forms liquid molten iron, and temperature of fusion is 1460-1490 ℃;
Above-mentioned mottled cast iron molten iron is poured into the dry sand casting mold that wire group is housed, and liquid molten iron surrounds chromium plating iron wire and cobalt plating iron wire, cooled and solidified then, form with the mottled cast iron be base wherein be distributed with the material that wire is rolled into a ball.
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| CN108913979A (en) * | 2018-07-02 | 2018-11-30 | 佛山博发智能科技有限公司 | A kind of wear-resisting oxidation resistant novel magnesium zinc alloy material |
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| CN101705453A (en) * | 2009-11-09 | 2010-05-12 | 西安建筑科技大学 | Process for preparing ductile cast iron-based composite |
| CN101709441A (en) * | 2009-11-09 | 2010-05-19 | 西安建筑科技大学 | Preparation process of nodular cast iron-based composite material |
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| CN101705453A (en) * | 2009-11-09 | 2010-05-12 | 西安建筑科技大学 | Process for preparing ductile cast iron-based composite |
| CN101709441A (en) * | 2009-11-09 | 2010-05-19 | 西安建筑科技大学 | Preparation process of nodular cast iron-based composite material |
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Effective date of registration: 20151112 Address after: 211600 No. 13, health Road, Jinhu County, Jiangsu, Huaian Patentee after: Jinhu Zhongbo IOT Technology Co., Ltd. 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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Granted publication date: 20120704 Termination date: 20180114 |