CN1425794A - Ceramic coating for protecting electrode substrate against high temperature melt erosion and its preparing method - Google Patents
Ceramic coating for protecting electrode substrate against high temperature melt erosion and its preparing method Download PDFInfo
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- CN1425794A CN1425794A CN03118423A CN03118423A CN1425794A CN 1425794 A CN1425794 A CN 1425794A CN 03118423 A CN03118423 A CN 03118423A CN 03118423 A CN03118423 A CN 03118423A CN 1425794 A CN1425794 A CN 1425794A
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- coating
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- molybdenum
- zirconium silicate
- powder
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Links
- 238000005524 ceramic coating Methods 0.000 title claims abstract description 16
- 230000003628 erosive effect Effects 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000000758 substrate Substances 0.000 title claims abstract description 8
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims abstract description 53
- 238000000576 coating method Methods 0.000 claims abstract description 34
- 239000011248 coating agent Substances 0.000 claims abstract description 32
- YXTPWUNVHCYOSP-UHFFFAOYSA-N bis($l^{2}-silanylidene)molybdenum Chemical compound [Si]=[Mo]=[Si] YXTPWUNVHCYOSP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910021343 molybdenum disilicide Inorganic materials 0.000 claims abstract description 28
- 239000000843 powder Substances 0.000 claims abstract description 28
- 229910052845 zircon Inorganic materials 0.000 claims abstract description 23
- 229910001182 Mo alloy Inorganic materials 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000002131 composite material Substances 0.000 claims abstract description 7
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 5
- 239000000956 alloy Substances 0.000 claims abstract description 5
- 238000005260 corrosion Methods 0.000 claims abstract 4
- 230000007797 corrosion Effects 0.000 claims abstract 4
- 238000007751 thermal spraying Methods 0.000 claims abstract 3
- 238000005507 spraying Methods 0.000 claims description 20
- 239000011230 binding agent Substances 0.000 claims description 14
- 229910000601 superalloy Inorganic materials 0.000 claims description 14
- 229910016006 MoSi Inorganic materials 0.000 claims description 13
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 12
- 238000005488 sandblasting Methods 0.000 claims description 9
- 239000007772 electrode material Substances 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 229910021344 molybdenum silicide Inorganic materials 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 11
- 239000000919 ceramic Substances 0.000 abstract description 7
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract description 6
- 239000011733 molybdenum Substances 0.000 abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 4
- 239000000155 melt Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 abstract 2
- 239000004615 ingredient Substances 0.000 abstract 1
- 239000002344 surface layer Substances 0.000 abstract 1
- 230000007704 transition Effects 0.000 abstract 1
- 239000011159 matrix material Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 230000001680 brushing effect Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000010891 electric arc Methods 0.000 description 4
- 235000019580 granularity Nutrition 0.000 description 4
- 238000007750 plasma spraying Methods 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 238000003618 dip coating Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 150000003016 phosphoric acids Chemical class 0.000 description 3
- 229940072033 potash Drugs 0.000 description 3
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 3
- 235000015320 potassium carbonate Nutrition 0.000 description 3
- 235000019353 potassium silicate Nutrition 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000289 melt material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Coating By Spraying Or Casting (AREA)
Abstract
一种保护电极基体耐高温熔体侵蚀的陶瓷涂层及制备方法。本发明的陶瓷涂层为硅酸锆或高纯度锆英石微粉制的团聚型复合陶瓷粉末涂层，或者加有二硅化钼底层，或者用硅酸锆或高纯度锆英石微粉制的团聚型复合陶瓷粉末材料作为面层，以硅酸锆或高纯度锆英石微粉为主要成分加以二硅化钼作为配料制备成不同组份的团聚球型复合粉末作为中间过渡层。采用热喷涂工艺，在一种钼合金或其它高温合金制成的电极基体表面制备耐高温熔体侵蚀涂层。涂层厚度小于0.7mm，采用该涂层结构的钼电极具有高温自封孔效果，抗熔体侵蚀能力与使用寿命可提高3～4倍。且热喷涂制备陶瓷涂层方法，具有工艺相对简单，制备成本低，涂层性能稳定等优点。Disclosed are a ceramic coating for protecting an electrode substrate against high-temperature melt erosion and a preparation method thereof. The ceramic coating of the present invention is an agglomerated composite ceramic powder coating made of zirconium silicate or high-purity zircon powder, or a molybdenum disilicide bottom layer is added, or an agglomerated coating made of zirconium silicate or high-purity zircon powder. Type composite ceramic powder material is used as the surface layer, with zirconium silicate or high-purity zircon powder as the main component and molybdenum disilicide as the ingredient to prepare agglomerated spherical composite powder with different components as the intermediate transition layer. A high-temperature melt erosion-resistant coating is prepared on the surface of an electrode substrate made of a molybdenum alloy or other high-temperature alloys by using a thermal spraying process. The thickness of the coating is less than 0.7mm. The molybdenum electrode with this coating structure has the effect of self-sealing holes at high temperature, and the corrosion resistance and service life of the melt can be increased by 3 to 4 times. Moreover, the ceramic coating method prepared by thermal spraying has the advantages of relatively simple process, low preparation cost, stable coating performance, and the like.
Description
Technical field
Preparation one deck ceramic coating on the metallic surface that the energy that the present invention relates to utilize high energy plasma arc or flame to produce uses in high-temperature fusant, particularly a kind of guard electrode matrix is high temperature resistant, anti-, and melt corrodes and the composite ceramic coat and the preparation method of high temperature thermal shock.
Background technology
Desire improves the service life of the metal that uses in the high-temperature fusant, adopts the effect of surface ceramic coat resist technology very remarkable.Under the condition of routine, general pottery all belongs to inert material, with high-temperature fusant chemical reaction does not take place, and oxide compound is the ceramic coating material of using always.
The high-temperature smelting pot electrode generally adopts the high-melting-point refractory material to make, and adopts Graphite Electrodes as steel-making with the high-temperature electric arc stove.Silicate institute of the Chinese Academy of Sciences and Xiangfan viscose glue technical institute all take high-temperature oxidation resistant coating protection steel-making with electric arc hearthstone electrode ink, can improve electrode life and reduce power consumption.Report in this steel technology 1996, (3) adopts oxidation resistant coating to reduce consumption of electrode.This type of oxidation resistant coating is the brushing of inorganic paint and makes, and the coating cohesive strength is not high, and washing away of anti-melt not.Glass Int.Mar.1984; the report related content of plasma spraying FeCrAl coating protection molybdenum electrode among p42～42 Protectionof molybdenum electrodes in forehearths during commissioning by the use ofFeCrAl coating; but the FeCrAl metal is soluble in the melt of melting, changes certain specific character of melt material as impurity.The electrode surface of making at electric arc furnace molybdenum alloy or other superalloy adopts the method for inert ceramic material coating shielding protection not appear in the newspapers.
Summary of the invention
The objective of the invention is to overcome the deficiency of the high temperature resistant melt etching resist of above-mentioned guard electrode matrix, the high temperature resistant melt erosive of a kind of guard electrode matrix inert ceramic material coating and preparation method thereof is provided.
For reaching goal of the invention; the high temperature resistant melt erosive of a kind of guard electrode matrix coating that the present invention proposes is the reunion ball-type powder spraying ceramic coating of zirconium silicate or high purity zircon micropowder system or is added with the molybdenum disilicide bottom or comprises that thickness is less than 0.1mm molybdenum disilicide bottom; with spray compound powder bed by a, b, c, d component sequential scheduling thickness, compound powder by 1000 the gram proportionings be:
A) zirconium silicate or zircon ZrO
2SiO
2350～390 grams, molybdenum disilicide MoSi
2590～630 grams, two kinds of material sum 〉=980 grams, binding agent is supplied surplus;
B) zirconium silicate or zircon ZrO
2SiO
2550～590 grams, molybdenum disilicide MoSi
2390～430 grams, two kinds of material sum 〉=980 grams, binding agent is supplied surplus;
C) zirconium silicate or zircon ZrO
2SiO
2750～790 grams, molybdenum disilicide MoSi
2190～230 grams, two kinds of material sum 〉=980 grams, binding agent is supplied surplus;
D) zirconium silicate or zircon ZrO
2SiO
2〉=980 grams, binding agent is supplied surplus.
Described thickness of ceramic coating is generally 0.4～0.5mm less than 0.7mm.
Described zirconium silicate or high-purity zirconium diamond stone powder and molybdenum silicide powder granularity are 0.5～15 μ m.
Described electrode materials is the electrode bar that the molybdenum alloy used of electric smelter or other superalloy are made.
The coating method of the high temperature resistant melt erosive of described guard electrode matrix ceramic coating may further comprise the steps:
1) molybdenum alloy or other superalloy electrode bar periphery to required spraying carries out sandblasting;
2) only spray described zirconium silicate or zircon reunion ball-type powder with plasma powder spraying or other heat spraying methods at molybdenum alloy or other superalloy electrode bar periphery through sandblasting, perhaps at molybdenum alloy or other superalloy electrode bar periphery spraying one deck molybdenum disilicide bottom through sandblasting, spray described zirconium silicate or zircon reunion ball-type powder again, perhaps at molybdenum alloy or other superalloy electrode bar periphery spraying one deck molybdenum disilicide bottom through sandblasting, thickness is less than 0.1mm, then described spray material is pressed described a, b, c, d component sequential scheduling thickness is sprayed on the electrode bar periphery, and total thickness is less than 0.7mm.
Its binding agent is general mineral binder bond and organic binder bond.
Zirconium silicate of the present invention or zircon also can be used alone as the little molybdenum alloy surface high temperature resistance melt erosive supercoat of thermal expansivity, or use molybdenum disilicide MoSi under the little working condition of thermal shocking
2Form the tie coat of two-layer or three-decker as bottom, be used for the electrode work condition environment not too under the harsh conditions.
Zirconium silicate of the present invention or zircon (ZrO
2SiO
2) and molybdenum disilicide (MoSi
2) Conglobation type ceramic powder unitized design, and the compound coating that adopts plasma spraying or other spraying technologies to prepare, have the following advantages:
1, zirconium silicate or zircon (ZrO
2SiO
2) material surface and alkaline melt be nonwetting, has excellent erosion-resisting characteristics; Molybdenum disilicide (MoSi
2) material and molybdenum matrix bond better performances, and in≤1400 ℃ alkaline melten glass electric arc smelting furnace, molybdenum disilicide (MoSi
2) can form the vitreous state tissue, play self-enclosed effect, thereby stop up the space that exists in the coating, played the effect that stops melt endosmosis protection molybdenum matrix.
2, zirconium silicate or zircon (ZrO
2SiO
2) and molybdenum disilicide (MoSi
2) material is close with the thermal expansivity of molybdenum and some superalloys, phase constitution is stable under≤1400 ℃ of high temperature, and in actual use, transformation stress and thermal stresses between coating and body material are less, can not cause the coating shedding phenomenon.
3, zirconium silicate or zircon (ZrO
2SiO
2) and molybdenum disilicide (MoSi
2) design of composite ceramic coat, and adopt plasma spraying and the preparation of other spraying technologies, coating and molybdenum alloy or other superalloy bar substrate combinating strength height.
Embodiment
Embodiment 1
1, the fines of zirconium silicate≤10 μ m granularities is made the spherical dusty spray of reuniting according to 〉=98wt% content ratio, and binding agent is supplied surplus.
2, surface finish alligatoring, activation treatment are carried out in the molybdenum alloy bar material cylindrical surface of required spraying;
3, with plasma powder spraying and gas explosion spraying method at molybdenum alloy and the high-temperature alloy surface spraying Zirconium silicate ceramic coating handled, thickness～0.5mm;
4, after coating preparation finishes, if adopt the method for dip-coating or brushing, the phosphoric acid salt or the potash water glass that are coated with about last layer 0.1mm at the ceramic coating outside surface carry out the sealing of hole processing again, and the coating result of use can be better.
Embodiment 2
1, with zircon and molybdenum disilicide starting material (finess of≤10 μ m granularities), by 〉=the 98wt% content ratio, make the spherical dusty spray of reuniting respectively
Binding agent is supplied surplus.
2, molybdenum alloy or other superalloy electrode bar periphery to required spraying carries out sandblasting;
3, spray one deck molybdenum disilicide bottom, thickness 0.1～0.15mm with plasma powder spraying or other heat spraying methods at molybdenum alloy or other superalloy electrode bar periphery through sandblasting;
4, adopt powder plasma spraying and gas explosion spraying method to spray the zircon ceramics coating on the molybdenum disilicide bottom, total thickness is less than 0.7mm.
5, after coating preparation finishes, if adopt the method for dip-coating or brushing, the phosphoric acid salt or the potash water glass that are coated with about last layer 0.1mm at the ceramic coating outside surface carry out the sealing of hole processing again, and the coating result of use can be better.
Embodiment 3
1, with zirconium silicate and molybdenum disilicide starting material (finess of≤10 μ m granularities), be mixed with the spherical dusty spray of reunion of five kinds of heterogeneities according to following ratio, be example with 1000 grams
Zirconium silicate (ZrO
2.SiO
2) molybdenum disilicide (MoSi
2)
A) 350～390 grams, 590～630 grams, two kinds of material sum 〉=980 grams
B) 550～590 grams, 390～430 grams, two kinds of material sum 〉=980 grams
C) 750～790 grams, 190～230 grams, two kinds of material sum 〉=980 grams
D) 〉=980 restrain
Binding agent is supplied surplus.
2, molybdenum alloy or other superalloy electrode bar periphery to required spraying carries out sandblasting;
3, spray one deck molybdenum disilicide bottom with plasma powder spraying or other heat spraying methods at molybdenum alloy or other superalloy electrode bar periphery through sandblasting, thickness is less than 0.1mm;
4, the spherical dusty spray of the reunion of above-mentioned preparation is sprayed with powder plasma, by a), b), c), d) component sequential scheduling thickness is sprayed on the molybdenum alloy electrode bar periphery, total thickness is less than 0.7mm.
5, after coating preparation finishes, if adopt the method for dip-coating or brushing, the phosphoric acid salt or the potash water glass that are coated with about last layer 0.1mm at the ceramic coating outside surface carry out the sealing of hole processing again, and the coating result of use can be better.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN031184235A CN1218064C (en) | 2003-01-07 | 2003-01-07 | Ceramic coating for protecting electrode substrate against high temperature melt erosion and its preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN031184235A CN1218064C (en) | 2003-01-07 | 2003-01-07 | Ceramic coating for protecting electrode substrate against high temperature melt erosion and its preparing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1425794A true CN1425794A (en) | 2003-06-25 |
| CN1218064C CN1218064C (en) | 2005-09-07 |
Family
ID=4790761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN031184235A Expired - Fee Related CN1218064C (en) | 2003-01-07 | 2003-01-07 | Ceramic coating for protecting electrode substrate against high temperature melt erosion and its preparing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1218064C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102317494B (en) * | 2009-02-10 | 2013-11-06 | 斯奈克玛 | Method for producing a heat barrier covering a metal substrate made of a superalloy, and thermomechanical part resulting from said production method |
| CN115028474A (en) * | 2022-05-11 | 2022-09-09 | 中北大学 | Graphene sensor composite thermal protection structure and preparation thereof |
-
2003
- 2003-01-07 CN CN031184235A patent/CN1218064C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102317494B (en) * | 2009-02-10 | 2013-11-06 | 斯奈克玛 | Method for producing a heat barrier covering a metal substrate made of a superalloy, and thermomechanical part resulting from said production method |
| CN115028474A (en) * | 2022-05-11 | 2022-09-09 | 中北大学 | Graphene sensor composite thermal protection structure and preparation thereof |
| CN115028474B (en) * | 2022-05-11 | 2023-09-08 | 中北大学 | Graphene sensor composite thermal protection structure and preparation thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1218064C (en) | 2005-09-07 |
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