CN104478439B - A kind of High-temperature-resandant andant wear-resistant Co3the preparation technology of B block - Google Patents

A kind of High-temperature-resandant andant wear-resistant Co3the preparation technology of B block Download PDF

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Publication number
CN104478439B
CN104478439B CN201410771734.XA CN201410771734A CN104478439B CN 104478439 B CN104478439 B CN 104478439B CN 201410771734 A CN201410771734 A CN 201410771734A CN 104478439 B CN104478439 B CN 104478439B
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block
powder
temperature
sintering
wear
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CN104478439A (en
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皇志富
邢建东
高义民
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Fugu Xuli Electromechanical Technology Co ltd
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Xian Jiaotong University
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Abstract

The invention discloses the Co of a kind of High-temperature-resandant andant wear-resistant3The preparation technology of B block, first, is not less than quality purity Co powder, the B powder of 99.8% and loads in ball grinder after 3:1 weighs rapidly in molar ratio, carry out evacuation and be filled with argon;Then ball grinder is put into ball milling 10 100 hours in ball mill, by Co, B mixed powder Fast Filling of taking-up to graphite crucible;Finally, will be equipped with the graphite crucible of Co, B mixed powder and put into plasma activated sintering stove carries out at 750 DEG C 1000 DEG C vacuum pressure sintering, and be incubated 5 10 minutes, furnace cooling after sintering, finally give Co3B block.Present invention process process is simple, and production cost is low, obtained Co3B block alternative " Si Taili " alloy is applicable to the wear working condition of different high temperature corrosions.

Description

A kind of High-temperature-resandant andant wear-resistant Co3The preparation technology of B block
Technical field
The present invention relates to the preparation method of a kind of High-temperature-resandant andant wear-resistant alloy.
Background technology
High temperature wear corrodes and brings massive losses to national economy.For hot rolling mechanical part and navigation diesel engine, one of the material such as parts such as the air bleeding valve of aeroplane engine device.Inside and outside " Si Taili " alloy used has comparatively ideal High-temperature-resandant andant wear-resistant corrosive nature more at home, but owing to its preparation cost is higher, for domestic many users relating to high temperature wear operating mode and researcher, it is desirable to obtain a kind of lower cost, military service performance again can preferable material.Obviously, a kind of High-temperature-resandant andant wear-resistant Co of invention3B compound substitutes " Si Taili " alloy and has important innovative value and engineer applied meaning in high temperature wear field.
Summary of the invention
It is an object of the invention to provide a kind of High-temperature-resandant andant wear-resistant Co3The preparation method of B block.
For reaching object above, the present invention adopts the following technical scheme that and is achieved:
A kind of Co of High-temperature-resandant andant wear-resistant3The preparation technology of B block, it is characterised in that comprise the steps:
(1) quality purity is not less than Co powder, the B powder of 99.8% load in ball grinder after 3:1 weighs rapidly in molar ratio, carries out evacuation and be filled with argon;
(2) ball grinder is put into ball milling 10-100 hour in ball mill, by Co, B mixed powder Fast Filling of taking-up to graphite crucible;
(3) will be equipped with the graphite crucible of Co, B mixed powder to put into plasma activated sintering stove carries out at 750 DEG C-1000 DEG C vacuum pressure sintering, and be incubated 5-10 minute, furnace cooling after sintering, finally give Co3B block.
In above-mentioned technique, described Co Powder Particle Size≤200 μm;B Powder Particle Size≤100 μm.
Vacuum < 10 of described ball grinder-1Pa。
Vacuum < 10 of described vacuum pressure sintering- 1Pa, pressure is 10-30Mpa.The programming rate of described vacuum pressure sintering is 2-3 DEG C/sec.
The present invention prepares Co3The technical process of B block materials is simple, and per kilogram production cost is only the 30-45% of " Si Taili " alloy, thus can significantly save production cost.Obtained Co3B block tissue is finer and close, and has excellent high temperature corrosion and wear resistance performance.As carried out oxidative wear test (wearing and tearing 3 hours) in 800 DEG C of high temperature wear testing machines, under same experimental condition compared with " Si Taili " material, its oxidative wear weightlessness is less than " Si Taili " alloy, there is obvious high performance-price ratio, be possibly realized by substituting expensive " Si Taili " alloy used at present.
The present invention can prepare the Co with different crystal particle scale3B block materials, the reduced capability of the most tiny high-temperature corrosion resistance of crystal grain, but its intensity can improve, and is applicable to the wear working condition of different high temperature corrosions.
Accompanying drawing explanation
Fig. 1 is the Co that the embodiment of the present invention 1 prepares3The fracture apperance photo of B block sample.
Detailed description of the invention
Embodiment 1
1) pure Co powder (quality purity and granularity are respectively as follows: 99.9% and 200 μm) and B powder (quality purity and granularity are respectively as follows: 99.99% and 100 μm) are loaded in ball grinder after 3:1 weighs rapidly in molar ratio (mainly require B powder is weighed rapidly, in order to avoid too much moisture absorption), carry out evacuation (vacuum 10-1Pa), it is re-filled with argon shield, then seals.
2) ball grinder being put into start in ball mill rotate, ball milling, after 10 hours, (will the most mainly avoid the moisture absorption that B powder is too much) in Co, B mixed powder Fast Filling to graphite crucible.The mechanical milling process Main Function of Co powder and B powder is the process of mix homogeneously, and B element is solid-solution in Co hardly.Along with the prolongation of Ball-milling Time, B powder is more uniform in Co powder surface distributed, and the Co of preparation3B crystal grain is the most tiny.
3) being put in vacuum sintering furnace by the graphite crucible holding Co, B mixed powder and be sintered, vacuum is 10- 1Pa;The programming rate of sintering furnace is: 2 DEG C/sec;Pressure is: 10MPa;Sintering temperature is: 750 DEG C;Temperature retention time is: 5 minutes.The demoulding after coming out of the stove when being together cooled to about 100 DEG C with sintering furnace after sintering.
The present embodiment gained Co3B block sample (φ 100mm × 100mm) grain size (by Zeiss image analyzer quantitative test) is about 89 μm;Drainage test consistency is utilized to be about: 98.2%;Two kinds of different materials carry out in 800 DEG C of high temperature wear testing machines oxidative wear test, and the weightlessness (using precision is 0.1mg scales/electronic balance weighing) after wearing and tearing 3 hours is as shown in table 1.
To the present embodiment Co3B block sample carries out microstructure analysis, and its fracture apperance photo is as shown in Figure 1.Being well combined between crystal grain as can be seen from Figure, consistency is higher.
Table 1
" Si Taili " material Co3B block materials
Wear weight loss (mg/h.mm2) 18.2 3.1
Embodiment 2
The technical process of the present embodiment is with embodiment 1, and some of which technological parameter is different:
Co Powder Particle Size 100 μm, B Powder Particle Size 50 μm.Ball-milling Time 100 hours, during sintering, the programming rate of the sintering process of vacuum drying oven is 3 DEG C/sec;Pressure is 30MPa;Sintering temperature 1000 DEG C, temperature retention time 10 minutes.
Gained Co3B block sample (φ 100mm × 100mm) grain size is about 67 μm;Consistency is about: 99.6%;Contrast as shown in table 2 (experiment condition is with embodiment 1) with the oxidative wear of " Si Taili ".
Table 2
" Si Taili " material Co3B block materials
Wear weight loss (mg/h.mm2) 18.2 3.6
Embodiment 3
The technical process of the present embodiment is with embodiment 1, and some of which technological parameter is different:
Co Powder Particle Size 50 μm, B Powder Particle Size 50 μm.Load evacuation 10 in ball grinder-2Pa, Ball-milling Time 50 hours, during sintering in vacuum drying oven sintering process, vacuum 10-2Pa;Programming rate is 3 DEG C/sec;Pressure is 25MPa;Sintering temperature 950 DEG C, temperature retention time 8 minutes.
Gained Co3B block sample (φ 100mm × 100mm) grain size is about 76 μm;Consistency is about: 99.1%;Contrast as shown in table 3 (experiment condition is with embodiment 1) with the oxidative wear of " Si Taili ".
Table 3
" Si Taili " material Co3B block materials
Wear weight loss (mg/h.mm2) 18.2 3.2

Claims (3)

1. the Co of a High-temperature-resandant andant wear-resistant3The preparation technology of B block, it is characterised in that comprise the steps:
(1) quality purity is not less than Co powder, the B powder 3:1 in molar ratio of 99.8% weigh rapidly In rear loading ball grinder, carry out evacuation and be filled with argon;
(2) ball grinder is put into ball milling 10-100 hour in ball mill, Co, B mixed powder that will take out Fast Filling is in graphite crucible;
(3) will be equipped with the graphite crucible of Co, B mixed powder put in plasma activated sintering stove in Carrying out vacuum pressure sintering at 750 DEG C-1000 DEG C, the programming rate of vacuum pressure sintering is 2-3 DEG C/sec, Vacuum < 10-1Pa, pressure is 10-30Mpa, and is incubated 5-10 minute, furnace cooling after sintering, Finally give Co3B block.
2. the Co of High-temperature-resandant andant wear-resistant as claimed in claim 13The preparation technology of B block, it is characterised in that Described Co Powder Particle Size≤200 μm;B Powder Particle Size≤100 μm.
3. the Co of High-temperature-resandant andant wear-resistant as claimed in claim 13The preparation technology of B block, it is characterised in that Vacuum < 10 of described ball grinder-1Pa。
CN201410771734.XA 2014-12-12 2014-12-12 A kind of High-temperature-resandant andant wear-resistant Co3the preparation technology of B block Expired - Fee Related CN104478439B (en)

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CN115353145B (en) * 2022-08-26 2023-11-24 中国矿业大学 Sn (Ba, ca) TiO prepared by vacuum plasma field assisted sol-gel technology 3 Method for preparing powder
CN115557793B (en) * 2022-09-19 2023-06-02 广东工业大学 High-entropy ceramic with fine grains, high hardness and high toughness, and preparation method and application thereof
CN116589282A (en) * 2023-06-06 2023-08-15 西安热工研究院有限公司 NiB (NiB) 2 Preparation method and application of compound

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4097653A (en) * 1977-03-07 1978-06-27 E. I. Du Pont De Nemours And Company Cobalt boride conductor compositions

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4097653A (en) * 1977-03-07 1978-06-27 E. I. Du Pont De Nemours And Company Cobalt boride conductor compositions

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