CN101709441A - Preparation process of nodular cast iron-based composite material - Google Patents
Preparation process of nodular cast iron-based composite material Download PDFInfo
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- CN101709441A CN101709441A CN200910218877A CN200910218877A CN101709441A CN 101709441 A CN101709441 A CN 101709441A CN 200910218877 A CN200910218877 A CN 200910218877A CN 200910218877 A CN200910218877 A CN 200910218877A CN 101709441 A CN101709441 A CN 101709441A
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- cast iron
- niobium
- composite material
- nodular cast
- spheroidal graphite
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Abstract
The invention discloses a preparation process of a nodular cast iron-based composite material. The preparation process mainly comprises the following steps of: weaving a niobium net with niobium wires, making the net into a net-like solid framework structure by shearing, and rolling or overlapping a plurality of layers of the nets; making a casting mould according to the requirements of the casting process and pre-arranging the niobium wire net-like solid framework in the cavity of the casting mould; casting a smelted nodular cast iron into the casting mould, and obtaining a niobium wire-nodular cast iron dual-material composite material fabricated body after cooling and cleaning the smelted nodular cast iron; and putting the niobium wire-nodular cast iron dual-material composite material fabricated body in a thermal treatment furnace; and heating the fabricated body to a carbide forming temperature, and preserving the heat to obtain a carbonized niobium particle reinforced nodular cast iron-based composite material. The nodular cast iron-based composite material prepared by the method exerts high wearing property of a carbonized niobium hard phase and the good tenacity of the nodular cast iron, is convenient for regulation and control and reliable in process, solves the problems of incomplete reaction of the composite material, uneven distribution of reinforced phase particles, reduction in reinforced phase interface contamination and the like, and can be widely applied to wear resistant fields, such as mines, electric power, metallurgy, building materials and the like.
Description
Technical field
The invention belongs to the metal-base composites technical field, particularly a kind of nodular cast iron base composite material preparation technology.
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 niobium carbide or niobium 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 niobium 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 nodular cast iron base composite material preparation technology, in the spheroidal graphite cast iron matrix, form netted niobium 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 niobium silk braiding niobium silk screen (1);
(2) with niobium 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 niobium 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 niobium silk-spheroidal graphite cast iron binary material precast body;
(8) cooling cleaning back is inserted heat treatment furnace to niobium 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 niobium carbide and strengthen nodular cast iron base composite material (4).
Described niobium silk (1) diameter is 0.1～2.5mm; Described niobium silk screen (1) is woven into single or multiple lift, and niobium silk spacing is 0.2～10mm, also can suitably increase spacing according to the operating mode needs.
In the described step (2), make niobium 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 niobium silk in the spheroidal graphite cast iron matrix, guaranteed the homogeneity of carbide forming element niobium in matrix;
2, in heat treatment furnace, by 1080 ℃～1350 ℃, soaking time is 30min～120min, make niobium 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 niobium 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 niobium atom belongs to solid-state diffusion, niobium carbide also generates at solid-state reaction in down, floating and the segregation of having avoided niobium 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 niobiums participate in reaction in generation niobium carbide.
3, the niobium carbide hard belongs to inner in-situ chemical reaction generation mutually, so the interface cleaning of particles of niobium carbide 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 niobium 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 niobium 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 niobium 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 niobium silk screen
Fig. 3 is a blanking liner plate precast body schematic cross-section
Fig. 4 is that whole niobium carbide strengthens 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 section for the partial carbonization niobium
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 niobium silk braiding niobium silk screen 1, niobium silk spacing is 2mm;
(2) niobium silk screen 1 is cut into rectangle by blanking liner plate length and height specification;
(3) rectangle niobium silk screen 1 is carried out pickling;
(4) make casting mold 2 by the casting technique requirement;
(5), and be placed into water glass sand mold 2 die cavities the niobium silk screen 1 multilayer stack that cuts;
(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 niobium silk-spheroidal graphite cast iron binary material precast body;
(8) after the cleaning of cooling off-type, niobium 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 niobium carbide and strengthen 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 niobium silk braiding niobium silk screen 1, niobium silk spacing is 10mm;
(2) niobium silk screen 1 is cut into rectangle by blanking liner plate length and half height specification;
(3) rectangle niobium silk screen is carried out pickling;
(4) make casting mold 2 by the casting technique requirement;
(5), and be placed into water glass sand mold 2 die cavities the niobium silk screen 1 multilayer stack that cuts;
(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 niobium silk-spheroidal graphite cast iron binary material precast body;
(8) after the cleaning of cooling off-type, local niobium 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 niobium and strengthen nodular cast iron base composite material blanking liner plate 4.
Claims (5)
1. nodular cast iron base composite material preparation technology, it is characterized in that: this preparation technology may further comprise the steps:
(1) with niobium silk braiding niobium silk screen (1);
(2) with niobium 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 niobium 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 niobium silk-spheroidal graphite cast iron binary material precast body;
(8) cooling cleaning back is inserted heat treatment furnace to niobium 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 niobium carbide and strengthen nodular cast iron base composite material (4).
2. a kind of nodular cast iron base composite material preparation technology according to claim 1 is characterized in that: described niobium filament diameter is 0.1～2.5mm.
3. a kind of nodular cast iron base composite material preparation technology according to claim 1 is characterized in that: described niobium silk screen (1) is woven into single or multiple lift, and niobium silk spacing is 0.2～10mm, also can suitably increase spacing according to the operating mode needs.
4. a kind of nodular cast iron base composite material preparation technology according to claim 1 is characterized in that: described step (2), make niobium silk screen cubic cage according to the size and the specification of part.
5. a kind of nodular cast iron base composite material preparation technology 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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| CN200910218877A CN101709441A (en) | 2009-11-09 | 2009-11-09 | Preparation process of nodular cast iron-based composite material |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051545A (en) * | 2011-01-14 | 2011-05-11 | 南京信息工程大学 | Wear-resistant and heat-resistant mottled cast iron material and preparation method thereof |
| CN102071371A (en) * | 2011-01-14 | 2011-05-25 | 南京信息工程大学 | Heat resistant and corrosion resistant vermicular cast iron material and preparation method thereof |
| CN102071379A (en) * | 2011-01-14 | 2011-05-25 | 南京信息工程大学 | High-strength gray cast iron material and preparation method thereof |
| CN102071372A (en) * | 2011-01-14 | 2011-05-25 | 南京信息工程大学 | Heat-resisting white cast iron material and preparation method thereof |
| CN102071380A (en) * | 2011-01-14 | 2011-05-25 | 南京信息工程大学 | Wear resistant mottled cast iron material and preparation method thereof |
| CN113278899A (en) * | 2021-04-29 | 2021-08-20 | 西安理工大学 | Wear-resistant carbide composite material and preparation method thereof |
| CN116422832A (en) * | 2023-04-27 | 2023-07-14 | 西安理工大学 | Wear-resistant shield machine hob cutter and preparation method thereof |
-
2009
- 2009-11-09 CN CN200910218877A patent/CN101709441A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051545A (en) * | 2011-01-14 | 2011-05-11 | 南京信息工程大学 | Wear-resistant and heat-resistant mottled cast iron material and preparation method thereof |
| CN102071371A (en) * | 2011-01-14 | 2011-05-25 | 南京信息工程大学 | Heat resistant and corrosion resistant vermicular cast iron material and preparation method thereof |
| CN102071379A (en) * | 2011-01-14 | 2011-05-25 | 南京信息工程大学 | High-strength gray cast iron material and preparation method thereof |
| CN102071372A (en) * | 2011-01-14 | 2011-05-25 | 南京信息工程大学 | Heat-resisting white cast iron material and preparation method thereof |
| CN102071380A (en) * | 2011-01-14 | 2011-05-25 | 南京信息工程大学 | Wear resistant mottled cast iron material and preparation method thereof |
| CN102071379B (en) * | 2011-01-14 | 2012-07-04 | 南京信息工程大学 | High-strength gray cast iron material and preparation method thereof |
| CN102071372B (en) * | 2011-01-14 | 2012-07-04 | 南京信息工程大学 | Heat-resisting white cast iron material and preparation method thereof |
| CN102051545B (en) * | 2011-01-14 | 2012-07-04 | 南京信息工程大学 | Wear-resistant and heat-resistant mottled cast iron material and preparation method thereof |
| CN102071371B (en) * | 2011-01-14 | 2012-08-22 | 南京信息工程大学 | Heat resistant and corrosion resistant vermicular cast iron material and preparation method thereof |
| CN113278899A (en) * | 2021-04-29 | 2021-08-20 | 西安理工大学 | Wear-resistant carbide composite material and preparation method thereof |
| CN116422832A (en) * | 2023-04-27 | 2023-07-14 | 西安理工大学 | Wear-resistant shield machine hob cutter and preparation method thereof |
| CN116422832B (en) * | 2023-04-27 | 2023-10-13 | 西安理工大学 | Wear-resistant shield machine hob cutter and preparation method thereof |
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Open date: 20100519 |