CN101705419A - Preparation technology of vanadium carbide reinforced nodular cast iron base composite material - Google Patents
Preparation technology of vanadium carbide reinforced nodular cast iron base composite material Download PDFInfo
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- CN101705419A CN101705419A CN200910218847A CN200910218847A CN101705419A CN 101705419 A CN101705419 A CN 101705419A CN 200910218847 A CN200910218847 A CN 200910218847A CN 200910218847 A CN200910218847 A CN 200910218847A CN 101705419 A CN101705419 A CN 101705419A
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Abstract
The invention discloses a preparation technology of vanadium carbide reinforced nodular cast iron base composite material, mainly comprising the following steps: weaving a vanadium wire mesh with vanadium wires; preparing mesh-type three-dimensional skeleton structure by tailoring, rolling by layers or overlying; manufacturing a casting mold according to casting technique; putting the vanadium wire mesh-type three-dimensional skeleton into a casting mold cavity in advance; smelting nodular cast iron to be poured into the casting mold cavity; cooling and cleaning to obtain a vanadium wire-nodular cast iron binary material prefabricated body; putting the vanadium wire-nodular cast iron binary material prefabricated body into a thermal treatment furnace; heating to the carbide forming temperature for preserving heat to obtain vanadium carbide reinforced nodular cast iron base composite material. The composite material prepared with the method fully performs high wear-resisting property of vanadium carbide hard phase as well as favourable ductility, convenient regulation and control and reliable technology of nodular cast iron, solves the problems of incomplete reaction of composite material, uneven wild phase particle distribution, weakened wild phase interface pollution and the like, and can be widely applied to the wear-resisting fields of mines, electric power, metallurgy, coal, building materials and the like.
Description
Technical field
The invention belongs to the metal-base composites technical field, particularly preparation technology of vanadium carbide reinforced nodular cast iron base composite material.
Background technology
Spheroidal graphite cast iron is a kind of common metal material that is widely used in metallurgy, mine, electric power, building, machinery, coal, automobile and other industries, owing to have higher carbon content, through breeding with spheroidizing after, carbon is distributed in the tissue with spherical or quasiflake graphite form, makes spheroidal graphite cast iron that intensity and toughness preferably be arranged.But owing to lack hard phase such as carbide in the spheroidal graphite cast iron, its macrohardness has only about HRC35, so spheroidal graphite cast iron can not resist under the wear working condition condition, abrasive material is to the cutting abrasion effect of piece surface, this makes spheroidal graphite cast iron be difficult to be applied on the frayed equipment part, has greatly limited its use range.
Produce at present to go up and improve spheroidal graphite cast iron wear resistance aspect,, obtain tissues such as bainite, martensite, can only improve wear resistance by trace, still can not make spheroidal graphite cast iron be widely used in the wearing and tearing field by adding alloying element or thermal treatment; The compound preparation technology of ceramic particle enhanced has appearred in recent years, for example be placed on the casting mold bottom with vanadium carbide or vanadium nitride particle, and then pour into spheroidal graphite cast iron, but preparation technology is difficult to stable control, the enhanced granule skewness still is difficult to obtain to strengthen the whole abrasion-resistant nodular cast iron that body is evenly distributed.Also have hard particles such as vanadium carbide are shaped with adhesive cures, put into casting mold, then casting of molten metal, make the fusion of interpenetrating of hard particles and molten metal, but produce a large amount of gases because binding agent at high temperature decomposes, cause the many pores of the inner formation of composite bed, effect is undesirable.
Summary of the invention
The purpose of this invention is to provide a kind of preparation technology of vanadium carbide reinforced nodular cast iron base composite material, in the spheroidal graphite cast iron matrix, form netted vanadium carbide hard phase by this technology, and effectively be combined as a whole with spheroidal graphite cast iron, given full play to the high abrasion characteristic of hard phase, the excellent toughness that has also kept matrix metal, thereby reach best Performance Match, can be made into the product of multiple structural shape, development prospect is wide.
Technical scheme of the present invention is achieved in that
(1) with vanadium silk braiding vanadium silk screen (1);
(2) with vanadium silk screen (1) cutting, multilayer rolls or superpose, and is prefabricated into netted cubic cage;
(3) carry out pickling and remove the greasy dirt foreign material being prefabricated into netted three-dimensional skeleton;
(4) make casting mold by the casting technique requirement;
(5) the three-dimensional skeleton of ready-formed vanadium silk screen (1) shape is put into casting mold (2);
(6) smelt spheroidal graphite cast iron (3), obtain liquid spheroidal graphite cast iron;
(7) liquid spheroidal graphite cast iron is poured into casting mold, obtain vanadium silk-spheroidal graphite cast iron binary material precast body;
(8) cooling cleaning back is inserted heat treatment furnace to vanadium silk-spheroidal graphite cast iron binary material precast body;
(9) under the carbide formation temperature, be incubated;
(10) come out of the stove behind the furnace cooling, promptly make vanadium carbide reinforced nodular cast iron base composite material (4).
Described vanadium silk (1) diameter is 0.1～2.5mm; Described vanadium silk screen (1) is woven into single or multiple lift, and vanadium silk spacing is 0.2～10mm, also can suitably increase spacing according to the operating mode needs.
In the described step (2), make vanadium silk screen (1) cubic cage according to the size and the specification of part.Described step (9) carbide formation temperature is 1080 ℃～1350 ℃, and soaking time is 30min～120min.
Compared with prior art, the present invention has the following advantages:
1, the principle of oozing by casting is made into precast body to the solid netted skeletal fixation of vanadium silk in the spheroidal graphite cast iron matrix, guaranteed the homogeneity of carbide forming element vanadium in matrix;
2, in heat treatment furnace, by 1080 ℃～1350 ℃, soaking time is 30min～120min, make vanadium atom carry out the abundant diffusion of middle long-range, permeate in the spheroidal graphite cast iron matrix, and with spheroidal graphite cast iron in carbon atom generation reaction in, naturally generate the vanadium carbide hard-phase particles, because 1080 ℃～1350 ℃ of humidity provinces are lower than the liquefaction temperature of spheroidal graphite cast iron, therefore the diffusion of vanadium atom belongs to solid-state diffusion, vanadium carbide also generates at solid-state reaction in down, floating and the segregation of having avoided vanadium carbide and matrix metal difference of specific gravity to cause, solved hard and be difficult to a disperse and an equally distributed Composite Preparation difficult problem mutually, and can make whole vanadium participate in reaction in generation vanadium carbide.
3, the vanadium carbide hard belongs to inner in-situ chemical reaction generation mutually, so the interface cleaning of vanadium carbide particulate is pollution-free, be combined into one with the spheroidal graphite cast iron matrix, has good interface in conjunction with effect, avoided adding the wild phase interface weakens problem on the conventional composite materials preparation technologies such as hard particles, the matrix material that obtains had both kept the excellent toughness of spheroidal graphite cast iron, and the high-wearing feature of vanadium carbide hard phase has been arranged again, had further promoted the wear-out life of material.
4, according to the needs of part, both can be positioned over the vanadium silk screen part of casting mold, obtain local attrition resistant part behind the cast spheroidal graphite cast iron, composite bed thickness can be adjusted arbitrarily according to working condition requirement; Also can be positioned over the vanadium silk screen in the whole casting mold die cavity, obtain whole attrition resistant part behind the cast spheroidal graphite cast iron, process controllability is strong.
Description of drawings
Fig. 1 is a schema of the present invention
Fig. 2 is the casting mold schematic cross-section that presets the vanadium silk screen
Fig. 3 is a blanking liner plate precast body schematic cross-section
Fig. 4 is whole vanadium carbide reinforced nodular cast iron base composite material blanking liner plate schematic cross-section
Fig. 5 strengthens nodular cast iron base composite material blanking liner plate schematic cross-section for the partial carbonization vanadium
Embodiment
The invention will be further described below in conjunction with embodiment and accompanying drawing.
Embodiment 1: make integral composite blanking liner plate
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, concrete operations step is as follows:
(1) with 0.5mm vanadium silk braiding vanadium silk screen 1, vanadium silk spacing is 2mm;
(2) vanadium silk screen 1 is cut into rectangle by blanking liner plate length and height specification;
(3) rectangle vanadium silk screen 1 is carried out pickling;
(4) make casting mold 2 by the casting technique requirement;
(5) vanadium silk screen 1 multilayer that cuts is superposeed, and be placed into the die cavity of water glass sand mold 2;
(6) smelt spheroidal graphite cast iron 3, obtain liquid spheroidal graphite cast iron;
(7) adopt gravity casting method that liquid spheroidal graphite cast iron 3 is poured into casting mold, make liquid spheroidal graphite cast iron be full of the space of netted three-dimensional skeleton, obtain vanadium silk-spheroidal graphite cast iron binary material precast body;
(8) after the cleaning of cooling off-type, vanadium silk-spheroidal graphite cast iron binary material precast body is inserted heat treatment furnace;
(9) about 1300 ℃ of temperature, be incubated 60min down;
(10) come out of the stove behind the furnace cooling, promptly obtain whole vanadium carbide reinforced nodular cast iron base composite material blanking liner plate 4.
Embodiment 2: make local composite material blanking liner plate
As Fig. 1 and shown in Figure 5, the concrete operations step is as follows:
(1) with 2.0mm vanadium silk braiding vanadium silk screen 1, vanadium silk spacing is 10mm;
(2) vanadium silk screen 1 is cut into rectangle by blanking liner plate length and half height specification;
(3) rectangle vanadium silk screen is carried out pickling;
(4) make casting mold 2 by the casting technique requirement;
(5) vanadium silk screen 1 multilayer that cuts is superposeed, and be placed into the die cavity of water glass sand mold 2;
(6) smelt spheroidal graphite cast iron 3, obtain liquid spheroidal graphite cast iron;
(7) adopt gravity casting method that liquid spheroidal graphite cast iron 3 is poured into casting mold, obtain local vanadium silk-spheroidal graphite cast iron binary material precast body;
(8) after the cleaning of cooling off-type, local vanadium silk-spheroidal graphite cast iron binary material precast body is inserted heat treatment furnace;
(9) about 1150 ℃ of temperature, be incubated 120min down;
(10) come out of the stove behind the furnace cooling, promptly obtain the partial carbonization vanadium and strengthen nodular cast iron base composite material blanking liner plate 4.
Claims (5)
1. preparation technology of vanadium carbide reinforced nodular cast iron base composite material, it is characterized in that: this preparation technology may further comprise the steps:
(1) with vanadium silk braiding vanadium silk screen (1);
(2) with vanadium silk screen (1) cutting, multilayer rolls or superpose, and is prefabricated into netted cubic cage;
(3) carry out pickling and remove the greasy dirt foreign material being prefabricated into netted three-dimensional skeleton;
(4) make casting mold (2) by the casting technique requirement;
(5) the three-dimensional skeleton of ready-formed vanadium mesh-like is put into casting mold (2);
(6) smelt spheroidal graphite cast iron (3), obtain liquid spheroidal graphite cast iron;
(7) liquid spheroidal graphite cast iron (3) is poured into casting mold (2), obtain vanadium silk-spheroidal graphite cast iron binary material precast body;
(8) cooling cleaning back is inserted heat treatment furnace to vanadium silk-spheroidal graphite cast iron binary material precast body;
(9) under the carbide formation temperature, be incubated;
(10) come out of the stove behind the furnace cooling, promptly make vanadium carbide reinforced nodular cast iron base composite material (4).
2. preparation technology of vanadium carbide reinforced nodular cast iron base composite material according to claim 1 is characterized in that: described vanadium filament diameter is 0.1～2.5mm.
3. preparation technology of vanadium carbide reinforced nodular cast iron base composite material according to claim 1 is characterized in that: described vanadium silk screen (1) is woven into single or multiple lift, and vanadium silk spacing is 0.2～10mm, also can suitably increase spacing according to the operating mode needs.
4. preparation technology of vanadium carbide reinforced nodular cast iron base composite material according to claim 1 is characterized in that: described step (2), make vanadium silk screen cubic cage according to the size and the specification of part.
5. preparation technology of vanadium carbide reinforced nodular cast iron base composite material according to claim 1 is characterized in that: described step (9) carbide formation temperature is 1080 ℃～1350 ℃, and soaking time is 30min～120min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910218847A CN101705419A (en) | 2009-11-09 | 2009-11-09 | Preparation technology of vanadium carbide reinforced nodular cast iron base composite material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979186A (en) * | 2010-11-16 | 2011-02-23 | 昆明理工大学 | Method for controlling graphite distortion of large-sized nodular iron casting |
| CN102071377A (en) * | 2011-01-14 | 2011-05-25 | 南京信息工程大学 | Abrasion resistant malleable cast iron material and preparation method thereof |
| CN110629106A (en) * | 2019-11-08 | 2019-12-31 | 沈阳工业大学 | Method for reinforcing nodular cast iron material by using nano SiO2 particles |
-
2009
- 2009-11-09 CN CN200910218847A patent/CN101705419A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979186A (en) * | 2010-11-16 | 2011-02-23 | 昆明理工大学 | Method for controlling graphite distortion of large-sized nodular iron casting |
| CN101979186B (en) * | 2010-11-16 | 2012-08-29 | 昆明理工大学 | Method for controlling graphite distortion of large-sized nodular iron casting |
| CN102071377A (en) * | 2011-01-14 | 2011-05-25 | 南京信息工程大学 | Abrasion resistant malleable cast iron material and preparation method thereof |
| CN102071377B (en) * | 2011-01-14 | 2012-08-22 | 南京信息工程大学 | Abrasion resistant malleable cast iron material and preparation method thereof |
| CN110629106A (en) * | 2019-11-08 | 2019-12-31 | 沈阳工业大学 | Method for reinforcing nodular cast iron material by using nano SiO2 particles |
| CN110629106B (en) * | 2019-11-08 | 2020-07-24 | 沈阳工业大学 | Method for reinforcing nodular cast iron material by using nano SiO2 particles |
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Open date: 20100512 |