CN106916986B - A kind of low cost Mo2FeB2The preparation method of based ceramic metal - Google Patents
A kind of low cost Mo2FeB2The preparation method of based ceramic metal Download PDFInfo
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- CN106916986B CN106916986B CN201710097111.2A CN201710097111A CN106916986B CN 106916986 B CN106916986 B CN 106916986B CN 201710097111 A CN201710097111 A CN 201710097111A CN 106916986 B CN106916986 B CN 106916986B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/058—Mixtures of metal powder with non-metallic powder by reaction sintering (i.e. gasless reaction starting from a mixture of solid metal compounds)
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/14—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on borides
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Abstract
The present invention relates to structure function material preparation field, particularly a kind of low cost Mo2FeB2The preparation method of based ceramic metal, belongs to structure function material preparation field.For the present invention using molybdenum-iron powder, ferro-boron powder, vanadium iron powder, carbonyl iron, Cr, Ni, C as reaction raw materials, the method sintered using reaction in-situ, prepares Mo2FeB2Based ceramic metal.Cermet prepared by the present invention is with Mo2FeB2For ceramic hard phase, using the iron-based body containing Cr, Ni, C as metallic binding phase.It the advantage is that：(1) it is few that each component materials of cermet are prepared, it is cost-effective；(2) Mo is substituted with molybdenum-iron powder, reduces manufacturing cost 40% ~ 50%, and cermet performance is suitable with the cermet made from pure Mo；(3) cermet preparation energy consumption is low, and technique is easy to control, and is needed suitable for industrialization.
Description
Technical field
The present invention relates to structure function material preparation field, particularly a kind of low cost Mo2FeB2The preparation of based ceramic metal
Method.
Background technology
Mo2FeB2Based ceramic metal is prepared by reaction in-situ sintering process, is with Mo2FeB2For ceramic hard phase,
Formed using iron-based body as metallic binding phase, there are a series of outstanding performances of cermet：(1) abrasion resistance properties are good, as work
Itself wear extent and the wear extent of machined material are all smaller at work for mould；(2) corrosion-and high-temp-resistant can be good, and
And there is higher hardness and bending strength；(3) thermal coefficient of expansion is close with steel, thus during coating as steel matrix, with reference to
Intensity is higher, the clad material suitable for preparing steel matrix；(4) density is relatively low, is only 3/5ths of hard alloy.
Although Mo2FeB2Based ceramic metal function admirable, and the not noble metal such as tungstenic, cobalt, but in current research,
Underlying scale greatly all in accordance with Fe-6B-48Mo carries out dispensing to prepare Mo2FeB2Based ceramic metal, the addition of Mo powder is larger,
Cause cost higher.Although substituting Mo powder with cheap molybdenum-iron powder prepares cermet, but cannot substitute completely.
The content of the invention
The present invention is in order to reduce Mo2FeB2The manufacturing cost of based ceramic metal, Mo powder systems can only partly be substituted by solving molybdenum-iron powder
The problem of standby cermet, and provide a kind of low cost Mo2FeB2The preparation method of based ceramic metal.
Technical solution of the present invention is as follows：
A kind of low cost Mo2FeB2The preparation method of based ceramic metal, concretely comprises the following steps：
1）Dispensing：Reaction powder is weighed, the reaction powder is included with molybdenum-iron powder, ferro-boron powder, carbonyl iron, Cr, Ni, C；
2）Batch mixing ball milling：Reaction raw materials will be weighed and be put into wet-milling in ball mill with sintered carbide ball；
3）It is dry：Will be through step 2）The mixture of ball milling is put into drying box dry；
4）Compacting：Dry powder is made to the rectangle pressed compact of 7mm × 7mm × 30mm using room temperature compression molding；
5）Vacuum-sintering：Cermet is prepared using the method for vacuum-sintering；
6）Grind shaping：By step 5）Mo is made in obtained cermet polishing, fine grinding shaping2FeB2Based ceramic metal produces
Product.
Preferably, the step 1）Reaction powder mass percent be：62.5% ~ 69.5% molybdenum-iron powder, 25% ~ 26%
Ferro-boron powder, 0 ~ 3.5% vanadium iron powder, 0 ~ 7% carbonyl iron, 0 ~ 2.1% Cr, 0 ~ 2.5% Ni, 0 ~ 0.2% C.
Preferably, the step 2）Wet-milling condition is：The wet-milling time is 36 ~ 50h, ratio of grinding media to material 4:1~7:1, ball-milling medium
For absolute ethyl alcohol, the mass ratio of powder and absolute ethyl alcohol is 1:1~1:1.5, drum's speed of rotation is the rad/ of 200 rad/min ~ 300
min。
Preferably, the step 3）Drying condition is that 1.5h ~ 2.5h is kept the temperature at 80 DEG C ~ 100 DEG C.
Preferably, the step 3）Dried powder carries out step 4 again with the sub-sieve sieving not less than 40 mesh）Compacting
Operation.
Preferably, the step 4）Pressure is 300MPa ~ 450Mpa.
Preferably, the step 5）For sintering temperature at 1100 DEG C ~ 1250 DEG C, soaking time is 0 ~ 60min.
Beneficial effects of the present invention：
1）The present invention provides a kind of low cost Mo2FeB2The preparation method of based ceramic metal.This method reality is with molybdenum-iron
Powder substitutes Mo powder to prepare Mo completely2FeB2Based ceramic metal, greatly reduces manufacturing cost, and obtained Mo2FeB2Fund
Belong to ceramic performance and be not less than cermet made from pure Mo powder.
2）Inexpensive Mo2FeB2Based ceramic metal is to substitute pure Mo powder with molybdenum-iron powder to be prepared, obtained cermet
It is with Mo2FeB2For ceramic hard phase, using the iron-based body containing Cr, Ni, C as metallic binding phase.
3）The contrast of front and rear cost of material：Mo powder price is 260 yuan/kilogram in first wife's material；Molybdenum-iron powder price in the application
For 80 yuan/kilogram；Remaining cost of material is respectively 100 yuan/kilogram of FeB powder, 60 yuan/kilogram of Fe powder, 90 yuan/kilogram of Cr powder, Ni
130 yuan/kilogram of powder, 5 yuan/kilogram of C powder.Both compare cost savings 40% ~ 50%.
4）Molybdenum-iron powder, ferro-boron powder and carbonyl iron dust in the application, Mo is generated under reaction sintering effect2FeB2Ceramics
Hard phase, and other raw materials are then more or less to be dissolved in iron or in hard phase, dissolves in and the iron containing Cr, Ni, C is then formed in iron
Parent metal Binder Phase, dissolving in then strengthens cermet performance in hard phase.Wherein the effect of C is deoxidation；Cr elements are present in
In Binder Phase, increase the corrosion resistance of Binder Phase, there is the anisotropy with then reducing hard phase in hard phase, improve metal pottery
The mechanical property of porcelain；Ni is primarily present in Binder Phase, is beneficial to Binder Phase and is changed into austenite, so as to improve cermet
Mechanical property.
5）According to the difference to cermet performance requirement, carbonyl iron dust, Cr powder, Ni powder and C powder can be appropriate in raw material
Content, especially carbonyl iron dust are adjusted, can be adjusted according to the content of Cr powder, Ni powder and C powder, appropriate increases or decreases carbonyl
The content of iron powder.
6）The application is optimized cermet process, ensures the performance of final products according to the change of raw material.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is the inexpensive Mo of the present invention2FeB2Based ceramic metal prepares technological process.
Fig. 2 is Mo prepared by the present invention2FeB2The XRD diffraction patterns of based ceramic metal.
Embodiment
Technical scheme is described further with reference to example.
Embodiment 1
A kind of as shown in Figure 1, low cost Mo2FeB2The preparation method of based ceramic metal, it includes the following steps：
(1) dispensing：Weigh molybdenum-iron powder 62.62g, ferro-boron powder 25.93g, carbonyl iron dust 6.78g, Cr powder 2.08g, Ni powder
2.42g, C powder 0.17g add up to 100g as reaction raw materials.
(2) batch mixing ball milling：By with powder be put into sintered carbide ball wet in ball mill, 48h, wherein ratio of grinding media to material are 5:
1, ball-milling medium is absolute ethyl alcohol, and the mass ratio of powder and absolute ethyl alcohol is 1:1, drum's speed of rotation 250rad/min；
(3) it is dry：Mixture through ball milling is put into drying in drying box, 2h is kept the temperature at 80 DEG C；
(4) suppress：Dry powder is made to the rectangle pressed compact of 7mm × 7mm × 30mm using room temperature compression molding, its
Middle pressure is 350MPa；
(5) vacuum-sintering：Cermet is prepared using the method for vacuum-sintering, sintering temperature is at 1200 DEG C, soaking time
For 40min；
(6) shaping is ground：Cermet obtained above is polished, remove surface there may be the defects of, refine shaping
Mo is made2FeB2Based ceramic metal product.
The consistency of drainage measure cermet is used as 7.8 g/cm3；Cermet is measured using universal testing machine
Bending strength be 1500 MPa；The hardness of Rockwell hardness instrument measure cermet is used as HRA 86.
Embodiment 2
A kind of as shown in Figure 1, low cost Mo2FeB2The preparation method of based ceramic metal, it includes the following steps：
(1) dispensing：Weigh molybdenum-iron powder 66.3g, ferro-boron powder 25.93g, carbonyl iron dust 3.1g, Cr powder 2.08g, Ni powder
2.42g, C powder 0.17g add up to 100g as reaction raw materials.
(2) batch mixing ball milling：By with powder be put into sintered carbide ball wet in ball mill, 48h, wherein ratio of grinding media to material are 5:
1, ball-milling medium is absolute ethyl alcohol, and the mass ratio of powder and absolute ethyl alcohol is 1:1, drum's speed of rotation 250rad/min；
(3) it is dry：Mixture through ball milling is put into drying in drying box, 2h is kept the temperature at 80 DEG C；
(4) suppress：Dry powder is made to the rectangle pressed compact of 7mm × 7mm × 30mm using room temperature compression molding, its
Middle pressure is 350MPa；
(5) vacuum-sintering：Cermet is prepared using the method for vacuum-sintering, sintering temperature is at 1200 DEG C, soaking time
For 40min；
(6) shaping is ground：Cermet obtained above is polished, remove surface there may be the defects of, refine shaping
Mo is made2FeB2Based ceramic metal product.
The consistency of drainage measure cermet is used as 8 g/cm3；Using universal testing machine measure cermet
Bending strength is 1720 MPa；The hardness of Rockwell hardness instrument measure cermet is used as HRA 90.
Embodiment 3
A kind of as shown in Figure 1, low cost Mo2FeB2The preparation method of based ceramic metal, it includes the following steps：
(1) dispensing：Weigh molybdenum-iron powder 66.4g, ferro-boron powder 25.93g, vanadium iron powder 3g, carbonyl iron dust 0g, Cr powder 2.08g,
Ni powder 2.42g, C powder 0.17g adds up to 100g as reaction raw materials.
(2) batch mixing ball milling：By with powder be put into sintered carbide ball wet in ball mill, 48h, wherein ratio of grinding media to material are 5:
1, ball-milling medium is absolute ethyl alcohol, and the mass ratio of powder and absolute ethyl alcohol is 1:1, drum's speed of rotation 250rad/min；
(3) it is dry：Mixture through ball milling is put into drying in drying box, 2h is kept the temperature at 80 DEG C；
(4) suppress：Dry powder is made to the rectangle pressed compact of 7mm × 7mm × 30mm using room temperature compression molding, its
Middle pressure is 350MPa；
(5) vacuum-sintering：Cermet is prepared using the method for vacuum-sintering, sintering temperature is at 1200 DEG C, soaking time
For 40min；
(6) shaping is ground：Cermet obtained above is polished, remove surface there may be the defects of, refine shaping
Mo is made2FeB2Based ceramic metal product.
The consistency of drainage measure cermet is used as 7.9 g/cm3；Cermet is measured using universal testing machine
Bending strength be 1600 MPa；The hardness of Rockwell hardness instrument measure cermet is used as HRA 89.
1 this patent molybdenum-iron powder of table compares the performance of cermet
As shown in Table 1, the cermet that Mo powder makes is substituted by molybdenum-iron powder completely, by the cooperation of raw material and technique,
The consistency, bending strength, hardness of its cermet is set to reach at or above the cermet using Mo powder as raw material in the prior art,
Prove that the technical solution of the application on the basis of the performance of cermet is ensured, has reached complete substitution Mo powder, reduced cost
Effect.
Above content is in conjunction with specific embodiments to the further description of the present invention, it is impossible to assert the tool of the present invention
Body embodiment is only limitted to this, for the professional technician of the technical field of the invention, is not departing from structure of the present invention
On the premise of think of, some simple scopes of patent protection replaced, should all be considered as belonging to the present invention can also be made.
Claims (6)
- A kind of 1. low cost Mo2FeB2The preparation method of based ceramic metal, it is characterised in that：Concretely comprise the following steps：1）Dispensing：Reaction powder is weighed, the reaction powder is included with molybdenum-iron powder, ferro-boron powder, carbonyl iron, Cr, Ni, C；2）Batch mixing ball milling：Reaction raw materials will be weighed and be put into wet-milling in ball mill with sintered carbide ball；3）It is dry：Will be through step 2）The mixture of ball milling is put into drying box dry；4）Compacting：Dry powder is used into rectangle pressed compact made from room temperature compression molding；5）Vacuum-sintering：Cermet is prepared using the method for vacuum-sintering；6）Grind shaping：By step 5）Mo is made in obtained cermet polishing, fine grinding shaping2FeB2Based ceramic metal product；The step 1）Reacting powder includes the component according to following mass percent：62.5% ~ 69.5% molybdenum-iron powder, 25% ~ 26% ferro-boron powder, 0 ~ 3.5% vanadium iron powder, 0 ~ 7% carbonyl iron, 0 ~ 2.1% Cr, 0 ~ 2.5% Ni, 0 ~ 0.2% C.
- 2. according to the method described in claim 1, it is characterized in that：The step 2）Wet-milling condition is：The wet-milling time for 36 ~ 50h, ratio of grinding media to material 4:1~7:1, ball-milling medium is absolute ethyl alcohol, and the mass ratio of powder and absolute ethyl alcohol is 1:1~1:1.5, ball milling Machine rotating speed is the rad/min of 200 rad/min ~ 300.
- 3. according to the method described in claim 1, it is characterized in that：The step 3）Drying condition is in 80 DEG C ~ 100 DEG C insulations 1.5h~2.5h。
- 4. according to the method described in claim 1, it is characterized in that：The step 3）Dried powder, which is used, is not less than 40 purposes Sub-sieve sieving carries out step 4 again）Pressing operation.
- 5. according to the method described in claim 1, it is characterized in that：The step 4）The pressure of compacting is 300MPa ~ 450MPa 。
- 6. according to the method described in claim 1, it is characterized in that：The step 5）Sintering temperature is protected at 1100 DEG C ~ 1250 DEG C The warm time is 0 ~ 60min.
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| CN111979464B (en) * | 2020-08-28 | 2021-11-05 | 南京航空航天大学 | Mo with dual-scale dual-form hard phase crystal grains2FeB2Base cermet and method for preparing same |
| CN112458350A (en) * | 2020-11-13 | 2021-03-09 | 湖南工业大学 | Mo2FeB2 cermet material and preparation method thereof |
| CN114318038B (en) * | 2021-12-01 | 2023-04-07 | 三峡大学 | Boride modified Mo 2 FeB 2 Preparation method of base cermet |
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| JP2014223630A (en) * | 2011-08-19 | 2014-12-04 | 東洋鋼鈑株式会社 | Welding rod and production method thereof |
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