[go: up one dir, main page]

CN1218064C - 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 PDF

Info

Publication number
CN1218064C
CN1218064C CN031184235A CN03118423A CN1218064C CN 1218064 C CN1218064 C CN 1218064C CN 031184235 A CN031184235 A CN 031184235A CN 03118423 A CN03118423 A CN 03118423A CN 1218064 C CN1218064 C CN 1218064C
Authority
CN
China
Prior art keywords
coating
grams
molybdenum
zirconium silicate
zircon
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN031184235A
Other languages
Chinese (zh)
Other versions
CN1425794A (en
Inventor
程旭东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan University of Technology WUT
Original Assignee
Wuhan University of Technology WUT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan University of Technology WUT filed Critical Wuhan University of Technology WUT
Priority to CN031184235A priority Critical patent/CN1218064C/en
Publication of CN1425794A publication Critical patent/CN1425794A/en
Application granted granted Critical
Publication of CN1218064C publication Critical patent/CN1218064C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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。本发明的陶瓷涂层以二硅化钼为底层,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,或者还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 uses molybdenum disilicide as the bottom layer, and the agglomerated composite ceramic powder material made of zirconium silicate or high-purity zircon powder is used as the surface layer, or zirconium silicate or high-purity zircon powder is used as the surface layer. Molybdenum disilicide is added as the main component 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

The high temperature resistant melt erosive of a kind of guard electrode matrix ceramic coating and preparation method thereof
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 bottom with the molybdenum disilicide, be surface layer with the reunion ball-type powder spraying ceramic coating of zirconium silicate or high purity zircon micropowder system.
Described thickness of ceramic coating is 0.4~0.7mm, is generally 0.4~0.5mm.
The high temperature resistant melt erosive of a kind of guard electrode matrix of the present invention coating; its described coating comprises that thickness is less than 0.1mm molybdenum disilicide bottom; with the compound powder bed of pressing a, b, c, the spraying of d component sequential scheduling thickness, compound powder by the proportioning of 1000 grams is:
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;
Wherein said zircon is the high-purity zirconium diamond stone, and zirconium silicate and high-purity zirconium diamond stone are reunion ball-type powder.Described total coating thickness is 0.4~0.7mm, is generally 0.4~0.5mm.
Described zirconium silicate or high-purity zirconium diamond stone powder and molybdenum silicide powder granularity are 0.5~15 μ m.
Described electrode matrix is the electrode bar that molybdenum alloy that electric smelter is used is made.
The coating method of the high temperature resistant melt erosive of described guard electrode matrix coating may further comprise the steps:
1) the molybdenum alloy electrode bar periphery to required spraying carries out sandblasting;
2) spray one deck molybdenum disilicide bottom with the plasma powder spraying method at molybdenum alloy electrode bar periphery, spray described zirconium silicate or zircon reunion ball-type powder again, sprayed coating thickness 0.4~0.7mm through sandblasting.
The coating method of the high temperature resistant melt erosive of described guard electrode matrix coating may further comprise the steps:
1) the molybdenum alloy electrode bar periphery to required spraying carries out sandblasting;
2) spray one deck molybdenum disilicide bottom with the plasma powder spraying method at molybdenum alloy electrode bar periphery through sandblasting, thickness is less than 0.1mm, then described spray material is sprayed on the electrode bar periphery total thickness 0.4~0.7mm by described a, b, c, d component sequential scheduling thickness.
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 following excellent
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 zirconium silicate fines of≤10 μ m granularities is made the spherical dusty spray of reuniting, the content 〉=98wt% of fines wherein, 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, the zircon of≤10 μ m granularities and molybdenum disilicide fines are made the spherical dusty spray of reuniting respectively, the content 〉=98wt% of fines wherein, 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 the zirconium silicate and the molybdenum disilicide fines of≤10 μ m granularities, be mixed with the spherical dusty spray of reunion of four 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 (10)

1、一种保护电极基体耐高温熔体侵蚀的涂层,其特征在于所述的涂层以二硅化钼为底层、以硅酸锆或高纯度锆英石微粉制的团聚球型粉末喷涂陶瓷涂层为面层。1. A coating for protecting the electrode substrate against high-temperature melt erosion, characterized in that the coating uses molybdenum disilicide as the bottom layer, and agglomerated spherical powder spraying ceramics made of zirconium silicate or high-purity zircon micropowder The coating is the surface layer. 2、如权利要求1所述的保护电极基体耐高温熔体侵蚀的涂层,其特征在于所述的陶瓷涂层厚度为0.4~0.7mm。2. The high-temperature molten corrosion-resistant coating for protecting the electrode substrate according to claim 1, characterized in that the thickness of the ceramic coating is 0.4-0.7 mm. 3、如权利要求1所述的保护电极基体耐高温熔体侵蚀的涂层,其特征在于所述的陶瓷涂层厚度为0.4~0.5mm。3. The high-temperature molten corrosion-resistant coating for protecting the electrode substrate according to claim 1, characterized in that the thickness of the ceramic coating is 0.4-0.5 mm. 4、一种保护电极基体耐高温熔体侵蚀的涂层,其特征在于所述的涂层包括厚度小于0.1mm二硅化钼底层,和按a、b、c、d组分顺序等厚度喷涂的复合型粉末层,复合型粉末按1000克计的配比为:4. A coating for protecting the electrode substrate against high temperature melt erosion, characterized in that the coating includes a molybdenum disilicide bottom layer with a thickness less than 0.1mm, and sprayed with equal thickness in the order of components a, b, c, and d Composite powder layer, the proportioning of composite powder by 1000 grams is: a)硅酸锆或锆英石ZrO2·SiO2 350~390克,二硅化钼MoSi2 590~630克,两种物料之和≥980克,粘结剂补足余量;a) Zirconium silicate or zircon ZrO 2 ·SiO 2 350-390 grams, molybdenum disilicide MoSi 2 590-630 grams, the sum of the two materials is ≥ 980 grams, and the binder makes up the balance; b)硅酸锆或锆英石ZrO2·SiO2 550~590克,二硅化钼MoSi2 390~430克,两种物料之和≥980克,粘结剂补足余量;b) zirconium silicate or zircon ZrO 2 ·SiO 2 550-590 grams, molybdenum disilicide MoSi 2 390-430 grams, the sum of the two materials is ≥ 980 grams, and the binder makes up the balance; c)硅酸锆或锆英石ZrO2·SiO2 750~790克,二硅化钼MoSi2 190~230克,两种物料之和≥980克,粘结剂补足余量;c) Zirconium silicate or zircon ZrO 2 SiO 2 750-790 grams, molybdenum disilicide MoSi 2 190-230 grams, the sum of the two materials is ≥ 980 grams, and the binder makes up the balance; d)硅酸锆或锆英石ZrO2·SiO2≥980克,粘结剂补足余量;d) Zirconium silicate or zircon ZrO 2 ·SiO 2 ≥ 980 grams, and the binder makes up the balance; 其中所述的锆英石为高纯度锆英石,硅酸锆和高纯度锆英石为团聚球型粉末。The zircon mentioned therein is a high-purity zircon, and the zirconium silicate and the high-purity zircon are agglomerated spherical powders. 5、如权利要求4所述的保护电极基体耐高温熔体侵蚀的涂层,其特征在于所述的涂层总厚度为0.4~0.7mm。5. The high-temperature melt erosion-resistant coating for protecting the electrode substrate as claimed in claim 4, characterized in that the total thickness of the coating is 0.4-0.7 mm. 6、如权利要求4所述的保护电极基体耐高温熔体侵蚀的涂层,其特征在于所述的涂层总厚度为0.4~0.5mm。6. The high-temperature melt erosion-resistant coating for protecting the electrode substrate as claimed in claim 4, characterized in that the total thickness of the coating is 0.4-0.5 mm. 7、如权利要求1或4所述的保护电极基体耐高温熔体侵蚀的涂层,其特征在于所述的硅酸锆或高纯度锆英石粉和二硅化钼粉粒度均为0.5~15μm。7. The high-temperature molten corrosion-resistant coating for protecting the electrode substrate according to claim 1 or 4, characterized in that the particle size of the zirconium silicate or high-purity zircon powder and molybdenum disilicide powder is 0.5-15 μm. 8、如权利要求1或4所述的保护电极基体耐高温熔体侵蚀的涂层,其特征在于所述的电极基体为电熔炉用的钼合金制成的电极棒材。8. The coating for protecting electrode substrates resistant to erosion by high-temperature melts as claimed in claim 1 or 4, characterized in that said electrode substrates are electrode rods made of molybdenum alloys for electric melting furnaces. 9、权利要求1所述的保护电极基体耐高温熔体侵蚀的涂层的涂制方法,其特征在于包括以下步骤:9. The coating method for protecting the electrode base body against high temperature melt erosion as claimed in claim 1, characterized in that it comprises the following steps: 1)对所需喷涂的钼合金电极棒材圆柱表面进行喷砂处理;1) Sandblasting the cylindrical surface of the molybdenum alloy electrode rod to be sprayed; 2)用等离子粉末喷涂方法在经过喷砂处理的钼合金电极棒材圆柱表面喷涂一层二硅化钼底层,再喷涂所述的硅酸锆或锆英石团聚球型粉末,喷涂层厚度0.4~0.7mm。2) Use the plasma powder spraying method to spray a layer of molybdenum disilicide bottom layer on the cylindrical surface of the molybdenum alloy electrode rod that has been sandblasted, and then spray the zirconium silicate or zircon agglomerated spherical powder, and the thickness of the sprayed layer is 0.4 ~ 0.7mm. 10、权利要求4所述的保护电极基体耐高温熔体侵蚀的涂层的涂制方法,其特征在于包括以下步骤:10. The coating method of the protective electrode base body resistant to high temperature melt erosion as claimed in claim 4, characterized in that it comprises the following steps: 1)对所需喷涂的钼合金电极棒材圆柱表面进行喷砂处理;1) Sandblasting the cylindrical surface of the molybdenum alloy electrode rod to be sprayed; 2)用等离子粉末喷涂方法在经过喷砂处理的钼合金电极棒材圆柱表面喷涂一层二硅化钼底层,厚度小于0.1mm,然后将所述的喷涂材料按所述的a、b、c、d组分顺序等厚度喷涂在电极棒材圆柱表面上,总厚度0.4~0.7mm。2) Spray a layer of molybdenum disilicide bottom layer on the cylinder surface of the molybdenum alloy electrode rod through sandblasting with a plasma powder spraying method, the thickness of which is less than 0.1mm, and then apply the sprayed material according to the above-mentioned a, b, c, The d component is sprayed on the cylindrical surface of the electrode rod in equal thickness in sequence, with a total thickness of 0.4-0.7mm.
CN031184235A 2003-01-07 2003-01-07 Ceramic coating for protecting electrode substrate against high temperature melt erosion and its preparing method Expired - Fee Related CN1218064C (en)

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 CN1425794A (en) 2003-06-25
CN1218064C true 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)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2941963B1 (en) * 2009-02-10 2011-03-04 Snecma METHOD FOR MANUFACTURING A THERMAL BARRIER COVERING A SUPERALLIATION METALLIC SUBSTRATE AND THERMOMECHANICAL PART RESULTING FROM THIS METHOD OF MANUFACTURE
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
CN1425794A (en) 2003-06-25

Similar Documents

Publication Publication Date Title
TW467875B (en) Coated article and method of making
CN103469207B (en) High-temperature oxidation resistant and corrosion resistant glass ceramic composite coating and preparation technology thereof
CN1027691C (en) High-temperature energy-saving corrosion-resistant ceramic coating composition
CN108409138B (en) Sulfuric acid and hydrochloric acid dew point corrosion resistant enamel coating and preparation process thereof
CN101363687A (en) Composite coating for smelting metal high temperature vessel and preparation method thereof
CN1160088A (en) Process for applying metallic adhesion layer for ceramic thermal barrier coatings to metallic components
CN102786820B (en) Infrared radiation coating suitable for metal matrix and preparation method
CN108264232B (en) High-temperature enamel coating with oxidation resistance, corrosion resistance and impact resistance and preparation method thereof
CN111809099B (en) NiCrAl modified oxide ceramic reinforced iron matrix composite material and its preparation method and application
CN109468574A (en) A kind of high temperature resistant environment barrier coating and preparation method
CN108516685A (en) Heat and corrosion resistant enamel coating and preparation method thereof
CN104193173A (en) Heat-insulating coating material for firing enamel on surface of titanium alloy and preparation method thereof
CN111040480B (en) A kind of anti-coking non-stick composite coating and preparation method thereof
CN1218064C (en) Ceramic coating for protecting electrode substrate against high temperature melt erosion and its preparing method
CN111646812A (en) Silicon carbide-calcium hexaluminate-aluminum composite refractory material
CN1974847A (en) Surface reinforcing method for tuyere of blast furnace
CN113354425B (en) Acid-resistant spray paint suitable for spherical roof of hot blast stove
CN111018547B (en) Light spray coating for blast furnace taphole smoke hood
CN1061015C (en) Ultra-low cement deposit material for tap hole of iron-mixing bogie
CN115260806B (en) High-temperature-resistant and anti-oxidation coating for medium and high manganese steel and coating method
CN114045053A (en) Decarburization-preventing separant
CN100402691C (en) Aluminium base or magnesium base composite material containing SnO2 coating, reinforced ceramic phase
CN115261764B (en) Aeroengine casing coating and preparation method thereof
CN113354424B (en) High-spalling-resistance oxygen lance brick and preparation method thereof
CN115403945B (en) Composite anti-corrosion coating on magnesium alloy surface and preparation method thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee