CN102071379B - High-strength gray cast iron material and preparation method thereof - Google Patents
High-strength gray cast iron material and preparation method thereof Download PDFInfo
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- CN102071379B CN102071379B CN2011100074745A CN201110007474A CN102071379B CN 102071379 B CN102071379 B CN 102071379B CN 2011100074745 A CN2011100074745 A CN 2011100074745A CN 201110007474 A CN201110007474 A CN 201110007474A CN 102071379 B CN102071379 B CN 102071379B
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Abstract
The invention provides a high-strength gray cast iron material and a preparation method thereof. The high-strength gray cast iron material has good properties. The preparation method has the advantages of simple technique and low production cost, and is suitable for industrial production. The high-strength gray cast iron material uses gray cast iron as the matrix, low-carbon metal wire clews are distributed in the matrix, the diameter of the low-carbon steel wires is 1-2mm, and the low-carbon steel wires account for 5-35% of the high-strength gray cast iron material by volume, and the diameter of the metal wire clews is 10-15cm.
Description
Technical field
The invention belongs to metal material field, relate to a kind of high-strength grey cast iron material and preparation method thereof.
Background technology
In metal material field, grey cast iron receives generally as structured material always and paying attention to.
CN200510016878.5 number application relates to a kind of novel micro alloyed high strength grey cast iron.It carries out the microalloying processing through optimizing design of alloy with elements such as adding V, N, finally obtains the novel micro alloyed high strength grey cast iron with good tensile property and processing characteristics.Its weight percent composition is: C:2.92～3.48; Si:1.52～2.36; Mn:0.22～0.78; P:0.011～0.048; S:0.03～0.15; Cr:0.15～0.50; Cu:0.3～0.78; Sn:0.011～0.098; V:0～0.100; N:0～0.100.This invention has broken through at present and has added the problem that elements such as molybdenum, nickel carry out alloying for improving intensity in the world.It is big that but graphitic pig iron increases the difficulty of N.Although take to add elements such as V, Cu, Sn, yet also be limited to the intensity that improves material.
Summary of the invention
The object of the invention is exactly to above-mentioned technological deficiency, and a kind of high-strength grey cast iron material is provided, and this material has good performance.
Another object of the present invention provides a kind of high-strength grey 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 high-strength grey cast iron material; It is characterized in that: this material is a matrix with the grey cast iron, the wire group that in matrix, is distributing and forming by Mild Steel Wire, and used Mild Steel Wire diameter is 1-2mm; The diameter of wire group is 10-15cm, and the volume percent that Mild Steel Wire accounts for material is 5-35%;
The following chemical components in percentage by weight of said grey cast iron matrix: C is 2.7%～4.0%, and Si is 1.4%～2.5%, and Mn is 0.5-1.4%, and Zr 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 said Mild Steel Wire is: C is 0.05%～0.12%, and Si is 0.09%～0.3%, and Mn is 0.25-0.5%, and < 0.05%, < 0.045%, all the other are Fe to S to P.
Compound N i3C and Ni3Si particle are also distributing in the matrix.
A kind of high-strength grey cast iron preparation methods, it is characterized in that: it may further comprise the steps:
The preparation of nickel plating Mild Steel Wire: cut-off directly for 1-2mm, composition weight percentage: C are 0.05%～0.12%, Si is 0.09%～0.3%, Mn 0.25-0.5%, P 0.05%, S 0.045%, all the other be the Mild Steel Wire of Fe, controlling the volume percent that Mild Steel Wire accounts for material is 5-35%; At its plating nickel on surface, the thickness of nickeling layer is the 50-500 micron by ordinary method;
Ordinary method by cleaning ball production is processed wire group with above-mentioned nickel plating Mild Steel 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 Mild Steel 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 grey cast iron material matrix: percentage composition C is 2.7%～4.0% by weight, Si is 1.4%～2.5%, Mn be 0.5-1.4%, Zr be 0.5-2%, P 0.08%, S 0.25%, all the other prepare burden for the grey cast iron of Fe; The grey cast iron material melts in induction furnace, and temperature of fusion is 1450-1480 ℃;
Above-mentioned grey cast iron molten iron is poured into the dry sand casting mold that nickel plating low-carbon (LC) wire group is housed; Liquid molten iron surrounds the nickel plating Mild Steel Wire, cooled and solidified then, and forming with the white cast iron is the material that wherein is distributed with wire group of base.
It is following that the present invention compares the beneficial effect of prior art:
1, Mild Steel Wire of the present invention self has suitable intensity and high toughness.The matrix of steel wire and graphitic pig iron all is an iron.Therefore steel wire and graphitic pig iron are easy to combine, and form good metallurgical binding.Like this, Mild Steel Wire is distributed in the fragility graphitic pig iron, and material is had good enhancing toughening effect.
2, after molten iron gets into the casting mold die cavity and the nickel of Steel Wire Surface contacts; The nickeling layer Ni of Steel Wire Surface is fused to molten iron; The Ni reaction of C in the molten iron and Si and Steel Wire Surface forms than higher C of cementite hardness and special compound Ni3Si and the Ni3C of Ni, is distributed in the matrix.These special compounds have further improved the intensity of material.
3, the Zr in the material of the present invention has the effect of remarkable refinement to the tissue of graphitic pig iron, for graphitic pig iron toughness reinforcing important effect is arranged.C and Zr also can form C and Zr compound (ZrC) in addition, are distributed in the raising that helps the strength of materials in the matrix of material.P, S are the impurity in the material, are controlled at the scope of permission.
4, material 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, because take silk and compound particle to mix the enhancing mode, and alloy material intensity height, the good toughness produced, and be 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 high-strength grey cast iron material that Fig. 1 makes for the embodiment of the invention one.
Fig. 1 can see at grey cast iron and combining well with 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.It is commercial that following diameter is that the Mild Steel Wire of 1-2mm is, and thickness is the nickeling layer self-control of 50-500 micron.
Embodiment one:
The preparation of nickel plating Mild Steel Wire:
The weight percentage of the composition of Mild Steel Wire is: C is 0.05%, and Si is 0.09%, and Mn is 0.25%, and < 0.05%, < 0.045%, all the other are Fe to S to P.The volume percent that the control Mild Steel Wire accounts for material is 5%; This steel wire diameter is 1mm, and Mild Steel Wire is by the ordinary method plating nickel on surface, and nickel plating thickness is 50 microns.
Preparation process of the present invention is following:
Ordinary method by cleaning ball production is processed wire group (formed wire is rolled into a ball moulding and can be made by the cleaning ball of the usefulness that washes the dishes or the method for title steel wire lump) with above-mentioned nickel plating Mild Steel Wire; Wire group's diameter is 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 Mild Steel 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 grey cast iron material matrix: percentage composition C is 2.7% by weight, and Si is 1.4%, and Mn is 0.5%; Zr is 0.5%, and < 0.08%, S < 0.25% for P; All the other are prepared burden for the grey cast iron of Fe, and the grey cast iron material melts in induction furnace, and temperature of fusion is 1465-1475 ℃;
Above-mentioned grey cast iron molten iron is poured into the dry sand casting mold that nickel plating low-carbon (LC) wire group is housed; Liquid molten iron surrounds the nickel plating Mild Steel Wire, cooled and solidified then, and forming with the white cast iron is the material that wherein is distributed with wire group of base.
Embodiment two:
The grey cast iron matrix is percentage composition by weight: C is 4.0%, and Si is 2.5%, and Mn is 1.4%, and Zr is 2%, and < 0.08%, < 0.25%, all the other prepare burden for Fe S P.
The composition weight percentage of Mild Steel Wire is: C is 0.12%, and Si is 0.3%, and Mn is 0.5%, and < 0.05%, < 0.045%, all the other are Fe to S to P.This steel wire diameter is 2mm, and the volume percent that Mild Steel Wire accounts for material is 35%; Mild Steel Wire is by the ordinary method plating nickel on surface, and nickel plating thickness is 500 microns.Press the ordinary method making wire group that cleaning ball is produced, wire group diameter is 10cm.
Its preparation process is with embodiment one.
Embodiment three:
The grey cast iron matrix is percentage composition by weight: C is 3%, and Si is 2%, and Mn is 0.9%, and Zr is 0.9%, and < 0.08%, < 0.25%, all the other prepare burden for Fe S P.
The composition weight percentage of Mild Steel Wire is: C is 0.1%, and Si is 0.2%, and Mn is 0.4%, and < 0.05%, < 0.045%, all the other are Fe to S to P, and this steel wire diameter is 1.5mm, and the volume percent that Mild Steel Wire accounts for material is 20%; Mild Steel Wire plating nickel on surface, nickel plating thickness are 200 microns.Press the ordinary method making wire group that cleaning ball is produced, wire group diameter is 12cm.
Its preparation process is with embodiment one.
The comparative example four: proportioning raw materials is within the scope of the present invention instance not
The grey cast iron matrix is percentage composition by weight: C is 2.5%, and Si is 1.3%, and Mn is 0.4%, and Zr is 0.2%, and P is 0.09%, and S is 0.5%, and all the other are prepared burden for Fe.
The composition weight percentage of Mild Steel Wire is: C is 0.03%, and Si is 0.06%, and Mn is 0.2%, and < 0.05%, < 0.045%, all the other are Fe to S to P.This steel wire diameter is 1mm, and the volume percent that Mild Steel Wire accounts for material is 3%.Mild Steel Wire not nickel plating of surface.Press the ordinary method making wire group that cleaning ball is produced, wire group diameter is 15cm.
Its preparation process is with embodiment one.
The comparative example five: proportioning raw materials is within the scope of the present invention instance not
The grey cast iron matrix is percentage composition by weight: C is 25%, and Si is 3%, and Mn is 2%, and Zr is 3%, and < 0.08%, < 0.25%, all the other prepare burden for Fe S P.
The composition weight percentage of Mild Steel Wire is: C is 0.2%, and Si is 0.4%, and Mn is 0.6%, and < 0.05%, < 0.045%, all the other are Fe to S to P.This steel wire diameter is 1mm, and the volume percent that Mild Steel Wire accounts for material is 40%.Mild Steel Wire not nickel plating of surface.Press the ordinary method making wire group that cleaning ball is produced, wire group diameter is 12cm.Its preparation process is with embodiment one.
Table 1
Visible by last table, C, Si, Mn increase in the chemical ingredients of graphitic pig iron and Mild Steel Wire is beneficial to the raising of material hardness in the material of the present invention.But too much, can reduce the toughness of body material.P and S increase, and also can reduce the fragility of body material.
The increase of Zr not only is beneficial to the raising of intensity and hardness in the graphitic pig iron, and helps the toughness raising.But, too much cause the increase of Zr and C compound, reduce the toughness of material.
The increase of Mild Steel Wire volume percent is beneficial to the raising of toughness of material.But too much, reduced the hardness of material, also reduced the intensity of material.
Intensity, impelling strength and the hardness of product one, two, three of the present invention are all better, and visible high-strength grey cast iron material of the present invention has good performance.
[0031]The increase of Mild Steel Wire volume percent is beneficial to the raising of toughness of material.But too much, reduced the hardness of material, also reduced the intensity of material.
Intensity, impelling strength and the hardness of product one, two, three of the present invention are all better, and visible high-strength grey cast iron material of the present invention has good performance.
Claims (1)
1. high-strength grey cast iron preparation methods, it is characterized in that: it may further comprise the steps:
The preparation of nickel plating Mild Steel Wire: cut-off directly for 1-2mm, composition weight percentage: C are 0.05%～0.12%, Si is 0.09%～0.3%, Mn 0.25-0.5%, P 0.05%, S 0.045%, all the other be the Mild Steel Wire of Fe, controlling the volume percent that Mild Steel Wire accounts for material is 5-35%; At its plating nickel on surface, the thickness of nickeling layer is the 50-500 micron by ordinary method;
Ordinary method by cleaning ball production is processed wire group with above-mentioned nickel plating Mild Steel 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 Mild Steel 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 grey cast iron material matrix: percentage composition C is 2.7%～4.0% by weight, Si is 1.4%～2.5%, Mn be 0.5-1.4%, Zr be 0.5-2%, P 0.08%, S 0.25%, all the other prepare burden for the grey cast iron of Fe; The grey cast iron material melts in induction furnace, and temperature of fusion is 1450-1480 ℃;
Above-mentioned grey cast iron molten iron is poured into the dry sand casting mold that nickel plating low-carbon (LC) wire group is housed; Liquid molten iron surrounds the nickel plating Mild Steel Wire, cooled and solidified then, and forming with the grey cast iron is the material that wherein is distributed with wire group of base.
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| CN2011100074745A CN102071379B (en) | 2011-01-14 | 2011-01-14 | High-strength gray cast iron material and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3991240A (en) * | 1975-02-18 | 1976-11-09 | Metco, Inc. | Composite iron molybdenum boron flame spray powder |
| US5163498A (en) * | 1989-11-07 | 1992-11-17 | Lanxide Technology Company, Lp | Method of forming metal matrix composite bodies having complex shapes by a self-generated vacuum process, and products produced therefrom |
| CN1154982A (en) * | 1996-01-16 | 1997-07-23 | 钱幼沧 | Composite wear-resistant structural material |
| CN101705455A (en) * | 2009-11-09 | 2010-05-12 | 西安建筑科技大学 | Preparation process of grey cast iron base composite material |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60208449A (en) * | 1984-04-02 | 1985-10-21 | Nissan Motor Co Ltd | Composite metal |
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2011
- 2011-01-14 CN CN2011100074745A patent/CN102071379B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3991240A (en) * | 1975-02-18 | 1976-11-09 | Metco, Inc. | Composite iron molybdenum boron flame spray powder |
| US5163498A (en) * | 1989-11-07 | 1992-11-17 | Lanxide Technology Company, Lp | Method of forming metal matrix composite bodies having complex shapes by a self-generated vacuum process, and products produced therefrom |
| CN1154982A (en) * | 1996-01-16 | 1997-07-23 | 钱幼沧 | Composite wear-resistant structural material |
| CN101705455A (en) * | 2009-11-09 | 2010-05-12 | 西安建筑科技大学 | Preparation process of grey cast iron base composite material |
| 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: 20151027 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 |