CN104451325A - Process for preparing Mo2FeB2-based metal ceramic - Google Patents
Process for preparing Mo2FeB2-based metal ceramic Download PDFInfo
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- CN104451325A CN104451325A CN201410772081.7A CN201410772081A CN104451325A CN 104451325 A CN104451325 A CN 104451325A CN 201410772081 A CN201410772081 A CN 201410772081A CN 104451325 A CN104451325 A CN 104451325A
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Abstract
The invention discloses a process for preparing Mo2FeB2-based metal ceramic. The process comprises the following steps: firstly selecting high-purity Fe2B powder and Mo powder as raw materials, controlling weight ratio at (0.25-0.5):(0.75-0.5), adding a small amount of absolute ethyl alcohol as a process control agent, weighing, and then carrying out vacuum ball milling for 5-25 hours; then filling mixed powder into a metal mould for compression moulding forming; and finally placing a compression moulding forming blank into a graphite mould, carrying out pressureless sintering in a vacuum sintering furnace at the sintering temperature of 1250-1350 without carrying out heat insulation treatment, and after the sintering is finished, cooling with the vacuum sintering furnace together. The process disclosed by the invention is simple in process. The Mo2FeB2-based metal ceramic prepared through the process disclosed by the invention has the advantages of higher relative density and good main mechanical property index, not only is suitable for an occasion in the filed of abrasion resistance, but also is used for the field of corrosion resistance.
Description
Technical field
The present invention relates to a kind of ceramic-metallic technology of preparing, particularly the sintering metal preparation method that is made up of hard phase (percent by volume is about 60%-80%) and Binder Phase of one.
Background technology
Mo
2feB
2based ceramic metal is (by hard phase Mo
2feB
2form with Binder Phase Fe, wherein hard phase percent by volume general control is between 60%-80%) there is excellent over-all properties, be with a wide range of applications in the field such as wear-resisting, anti-corrosion, can also Mo be utilized
2feB
2sintering metal and the good bonding properties of steel, adopt the method for the sintering of welding or combination, formed on the steel matrix surface that height is tough and there is excellent wear resistance and erosion resistance coating, can be applicable to the protective shield, tank armor plate, coal washing plant scraper plate, powder separating machine guide plate etc. of the slide carriage in the collars of high speed line lining milling train, colliery, nuclear reactor, be conducive to the wearing and tearing and the etching extent that reduce steel surface.At present, Japan and other countries is by research Mo
2feB
2the composition of based ceramic metal, the mutual relationship between microstructure sintering mechanism and performance, make its performance constantly be improved, be mainly used in moulding stock, and it has the advantages that excellent obdurability has concurrently mutually with hardness.On the domestic scholar as the unit such as University of Science & Technology, Beijing, Nanjing Aero-Space University Research foundation abroad, utilize Mo
2feB
2the good combination performance of based ceramic metal and steel, steel matrix is prepared the work-ing life that coating improves steel.
Mo is prepared in current home and abroad
2feB
2the starting material that based ceramic metal adopts are ferro-boron powder, carbonyl iron particles and molybdenum powder (existing lot of documents is reported) mainly, but due to silicon amount inherent in ferro-boron powder higher, the compound that a large amount of fragility such as silicon-boron, silicon-molybdenum formed in sintering process is larger, to Mo
2feB
2the infringement of based ceramic metal mechanical property is comparatively large, makes its performance cannot reach best.For this reason, Chinese patent CN102618769A provides with BN, iron carbonyl and molybdenum as Mo successfully prepared by starting material
2feB
2based ceramic metal, but need in the method to add binder (gasoline rubber), need to carry out the binder removal stage in sintering process, and also need isothermal holding when binder removal terminates finally to sinter, this adds preparation cycle undoubtedly; In addition, owing to there are three kinds of materials in starting material, mix in powder process in early stage, the mixing uniformity of powder needs strict control, otherwise the hard phase having other in reaction sintering process occurs, cannot reach and prepare high-performance Mo
2feB
2based ceramic metal final purpose.
Summary of the invention
The object of the present invention is to provide that a kind of cost is lower, process stabilizing and be easy to the preparation high-performance Mo of industrialization
2feB
2the method of based ceramic metal.
For reaching above object, the present invention takes following technical scheme to be achieved:
A kind of Mo
2feB
2the preparation technology of based ceramic metal, is characterized in that, comprises the steps:
(1) purity is selected to be not less than the Fe of 99.9%
2b powder and Mo powder are raw material, by weight Fe
2b:Mo=(0.25-0.5): (0.75-0.5), adds the dehydrated alcohol of mixed powder weight 0.5%, to load in ball grinder and vacuumize after weighing;
(2) ball grinder is put into ball mill ball milling 5-25 hour, take out mixed powder and be filled in metal die, compression molding under 150MPa-300MPa;
(3) base substrate of compression molding is put into vacuum sintering furnace and carry out pressureless sintering, vacuum tightness≤10
-1pa; Sintering temperature 1250 DEG C ~ 1350 DEG C, does not make isothermal holding, furnace cooling, obtains Mo
2feB
2based ceramic metal.
In above-mentioned technique, described Fe
2granularity≤150 μm of B powder; Granularity≤100 μm of Mo powder.
The vacuum tightness of described vacuum ball milling is 10
-1pa.The heat-up rate of described pressureless sintering is: 2-10 DEG C/sec.
Compared with the prior art, present invention process is simple, and without the need to isothermal holding, this is because in sintering temperature-rise period, sintering metal progressively completes alloying reaction, therefore, when temperature is raised to 1250 DEG C ~ 1350 DEG C, and Mo
2feB
2based ceramic metal has reacted (and belonging to liquid reactive sintering), if carry out isothermal holding again, Mo
2feB
2crystal grain obviously can be grown up thus be worsened sintering metal performance.Obtained Mo
2feB
2sintering metal relative density is higher, Main Mechanical index good (most high-compactness reaches 99.1%, and most high-flexural strength reaches 2000MPa, and maximum hardness reaches 89HRA).Not only be suitable for wear-resisting field occasion, and anti-corrosion field can also be used for.
Accompanying drawing explanation
The Mo of Fig. 1 obtained by the embodiment of the present invention 2
2feB
2based ceramic metal metallographic structure photo.
Embodiment
Embodiment 1
First, the Fe of purity 99.9%, granularity 100 μm selected by starting material
2the Mo powder of B powder and purity 99.99%, granularity 100 μm, weight ratio controls at 0.25:0.75, and the dehydrated alcohol adding mixed powder weight 0.5% is as process control agent, and loading after weighing in stainless steel jar mill and to vacuumize, vacuum tightness is 10
-1pa.
Then, ball grinder is put into ball mill start and rotate, Ball-milling Time was cooled to room temperature to tank body after 5 hours, opened tank body by Fe
2the mixed powder of B and Mo is filled in metal die, compression molding under 150MPa.
Finally, compression molding base substrate is put into graphite jig and carries out pressureless sintering in vacuum sintering furnace, during sintering, vacuum tightness is 10
-2pa; Heat-up rate is 10 DEG C/sec; Sintering temperature is: 1250 DEG C (without the need to carrying out isothermal holding), furnace cooling after sintering, takes out sintered compact and is Mo
2feB
2based ceramic metal, carries out performance test to it, and density is 97.1%, and three-point bending strength is 1520MPa, and hardness is 86.3HRA.
Embodiment 2
Technological process is substantially with embodiment 1, but processing parameter is different: Fe
2b Powder Particle Size is 150 μm; Mo Powder Particle Size is 50 μm, and weight ratio controls at 0.5:0.5.
Ball-milling Time 25 hours; Compression molding pressure 200MPa.
Pressureless sintering vacuum tightness is 10
-1pa; Heat-up rate is 5 DEG C/sec; Sintering temperature 1350 DEG C.Mo prepared by the present embodiment
2feB
2based ceramic metal density is 99.1%, and three-point bending strength is 2000MPa, and hardness is 87.3HRA.Its microstructure light micrograph (adopts the nitric acid spirits of 5% to corrode 5 seconds) as shown in Figure 1, as can be seen from Figure, and Mo
2feB
2based ceramic metal dense structure, most of Mo
2feB
2in square shape block distribution, therefore, it has higher comprehensive mechanical property index.
Embodiment 3
Technological process is substantially with embodiment 1, but processing parameter is different: Fe
2b Powder Particle Size is 50 μm; Mo Powder Particle Size is 100 μm, and weight ratio controls at 0.4:0.6.
Ball-milling Time 15 hours; Compression molding pressure 300MPa.
Pressureless sintering vacuum tightness is 10
-3pa; Heat-up rate is 2 DEG C/sec; Sintering temperature 1300 DEG C.Mo prepared by the present embodiment
2feB
2based ceramic metal density is 98.4%, and three-point bending strength is 1691MPa, and hardness is 89.0HRA.
Claims (4)
1. a Mo
2feB
2the preparation technology of based ceramic metal, is characterized in that, comprises the steps:
(1) purity is selected to be not less than the Fe of 99.9%
2b powder and Mo powder are raw material, by weight Fe
2b:Mo=(0.25-0.5): (0.75-0.5), adds the dehydrated alcohol of mixed powder weight 0.5%, to load in ball grinder and vacuumize after weighing;
(2) ball grinder is put into ball mill ball milling 5-25 hour, take out mixed powder and be filled in metal die, compression molding under 150MPa-300MPa;
(3) base substrate of compression molding is put into vacuum sintering furnace and carry out pressureless sintering, vacuum tightness≤10
-1pa; Sintering temperature 1250 DEG C ~ 1350 DEG C, does not make isothermal holding, furnace cooling, obtains Mo
2feB
2based ceramic metal.
2. Mo as claimed in claim 1
2feB
2the preparation technology of based ceramic metal, is characterized in that, described Fe
2granularity≤150 μm of B powder; Granularity≤100 μm of Mo powder.
3. Mo as claimed in claim 1
2feB
2the preparation technology of based ceramic metal, is characterized in that, the vacuum tightness of described vacuum ball milling is 10
-1pa.
4. Mo as claimed in claim 1
2feB
2the preparation technology of based ceramic metal, is characterized in that, the heat-up rate of described pressureless sintering is 2-10 DEG C/sec.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410772081.7A CN104451325B (en) | 2014-12-12 | 2014-12-12 | Process for preparing Mo2FeB2-based metal ceramic |
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|---|---|---|---|
| CN201410772081.7A CN104451325B (en) | 2014-12-12 | 2014-12-12 | Process for preparing Mo2FeB2-based metal ceramic |
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| CN104451325A true CN104451325A (en) | 2015-03-25 |
| CN104451325B CN104451325B (en) | 2017-01-11 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106048357A (en) * | 2016-06-13 | 2016-10-26 | 陕西理工学院 | MoSiC2-based metal ceramic material and preparation method thereof |
| CN106916986A (en) * | 2017-02-22 | 2017-07-04 | 三峡大学 | A kind of inexpensive Mo2FeB2The preparation method of based ceramic metal |
| CN111041321A (en) * | 2019-12-24 | 2020-04-21 | 浙江恒大数控装备有限公司 | Metal ceramic for machine tool guide rail and preparation process thereof |
| CN115652127A (en) * | 2022-11-01 | 2023-01-31 | 西安近代化学研究所 | Near-equiaxial crystal grain Mo 2 FeB 2 Preparation method of base cermet |
| CN116117145A (en) * | 2022-11-25 | 2023-05-16 | 西安近代化学研究所 | TiB (titanium-boron) 2 Modified Mo 2 FeB 2 Method for producing a base composite material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618769A (en) * | 2012-04-05 | 2012-08-01 | 北京科技大学 | Manufacturing method of Mo2FeB2 based steel bonded hard alloy |
| CN104004953A (en) * | 2014-06-08 | 2014-08-27 | 湖南人文科技学院 | Double-hard-phase composite reinforced boride-based metal ceramic and preparation method thereof |
-
2014
- 2014-12-12 CN CN201410772081.7A patent/CN104451325B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618769A (en) * | 2012-04-05 | 2012-08-01 | 北京科技大学 | Manufacturing method of Mo2FeB2 based steel bonded hard alloy |
| CN104004953A (en) * | 2014-06-08 | 2014-08-27 | 湖南人文科技学院 | Double-hard-phase composite reinforced boride-based metal ceramic and preparation method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106048357A (en) * | 2016-06-13 | 2016-10-26 | 陕西理工学院 | MoSiC2-based metal ceramic material and preparation method thereof |
| CN106048357B (en) * | 2016-06-13 | 2017-10-10 | 陕西理工学院 | A kind of MoSiC2 base metal-ceramic materials and preparation method thereof |
| CN106916986A (en) * | 2017-02-22 | 2017-07-04 | 三峡大学 | A kind of inexpensive Mo2FeB2The preparation method of based ceramic metal |
| CN111041321A (en) * | 2019-12-24 | 2020-04-21 | 浙江恒大数控装备有限公司 | Metal ceramic for machine tool guide rail and preparation process thereof |
| CN115652127A (en) * | 2022-11-01 | 2023-01-31 | 西安近代化学研究所 | Near-equiaxial crystal grain Mo 2 FeB 2 Preparation method of base cermet |
| CN115652127B (en) * | 2022-11-01 | 2023-09-08 | 西安近代化学研究所 | Nearly equiaxial grain Mo 2 FeB 2 Preparation method of base metal ceramic |
| CN116117145A (en) * | 2022-11-25 | 2023-05-16 | 西安近代化学研究所 | TiB (titanium-boron) 2 Modified Mo 2 FeB 2 Method for producing a base composite material |
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| CN104451325B (en) | 2017-01-11 |
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