CN1149521A - Welding rod for high-temperature corrosion-resistant valve sealing surface build-up welding - Google Patents
Welding rod for high-temperature corrosion-resistant valve sealing surface build-up welding Download PDFInfo
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- CN1149521A CN1149521A CN 95112091 CN95112091A CN1149521A CN 1149521 A CN1149521 A CN 1149521A CN 95112091 CN95112091 CN 95112091 CN 95112091 A CN95112091 A CN 95112091A CN 1149521 A CN1149521 A CN 1149521A
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Abstract
This invention discloses a welding electrode for build-up welding of seal surface for high-temp. corrosion-proof valve, being a high-alloy welding electrode. Its flux-coat composition is marble, fluorspar, titanium pigment, quartz sand, ferrotitanium, electrolytic manganese, ferro-molybdenum powder, tungsten powder, silicon-chrome alloy, boron carbide, ferrovanadium, soda and water glass. It overcomes the defects of the previous D547Mo and cobalt-base stalli alloy welding material and has the advantages of simple process for build-up welding, good cracking resistance, strong corrosion resistance, high thermo-stability and low-price. It meets the use requirement of high-temp. corrosion-proof valve and realizes the safety and reliability of seal for high-temp. corrosion-proof valve.
Description
The invention belongs to a kind of alloy electrode, the valve welding rod that the anti-corrosion manual build up welding of especially a kind of high alloy high temperature is used.
At present, adopt cobalt-based Si Taili (stellite No.6) alloy both at home and abroad usually, μ H-6,9-6D, D547, welding rods such as D547Mo are as the high-temperature corrosion-resistant valve sealing surface build-up welding material.These materials such as cobalt-based stellite cost an arm and a leg, surplus the per kilogram 500 yuan, and the bead-welding technology complexity; μ H-6 and for example, 9-6D, D547, welding rod bead-welding technologies such as D547Mo are very complicated, the overlay cladding crack resistance is bad, do not satisfy the instructions for use of high temperature corrosion resisting valve, and at high temperature hardness, heat endurance, non-oxidizability, thermal fatigue resistance exists certain defective on the performances such as anti-corrosion property, also need further perfect.
Purpose of the present invention just is to provide that a kind of technology is simple, crack resistance good, high temperature hardness, thermal fatigue resistance and the good valve sealing surface build-up welding welding rod of anti-corrosion property.
The welding rod that the present invention is alleged, its coating composition comprises marble, fluorite, titanium dioxide, quartz sand, ferrotianium, electrolytic manganese, the molybdenum-iron powder, tungsten powder, silicochromium, boron carbide, vanadium iron, soda ash, waterglass, it is characterized in that, this covering of an electrode composition consists of: marble 20～24%, fluorite 11～15%, titanium dioxide 2～5%, quartz sand 1～4%, ferrotianium 1～2.7%, electrolytic manganese 13～17%, molybdenum-iron powder 7～9.5%, tungsten powder 2～5%, silicochromium 19～23%, boron carbide 1～4%, vanadium iron powder 5～8%, soda ash 0.2～0.6%, waterglass are 10～13% of dry powder gross weight.Wherein preferred group becomes: marble 21.9%, fluorite 13.5%, titanium dioxide 3.4%, quartz sand 2.5%, ferrotianium 1.7%, electrolytic manganese 15.1%, molybdenum-iron powder 8.4%, tungsten powder 3.4%, silicochromium 21%, boron carbide 2.5%, vanadium iron powder 6.2%, soda ash 0.4%.
The deposited metal of welding rod of the present invention proves that through repetition test repeatedly it is significant in the effect that performances such as high temperature scratch, high temperature hardness, heat endurance, non-oxidizability, thermal fatigue resistance, anti-corrosion property obtain.New resurfacing welding material manufacturability, crack resistance significantly are better than D547Mo and stellite No.6 hardfacing alloy, and during heat stabilization test, experiment condition is 600 ℃ of heating-up temperatures, the type of cooling is an air cooling, is heated to 600 ℃ and is incubated, and takes out one group every 24 hours: be incubated 24 hours, its hardness HRC D547Mo respectively is 34.3, new material 44.8,96 hours, D547Mo25.4, new material 43.2, its test 168 hours, D547Mo is 33.4, new material 39.8.Corrosion test is under boiling temperature, at H
2SO
4(10%) in the solution, the new material corrosion resistance is better than heap D547Mo, and in HCl (10%) solution, new material is good.In the crack resistance experiment, the present invention will not be hot when built-up welding, and postwelding is added a cover heat-insulation layer and done slow cooling processing, postwelding flawless.And this welding rod gives when hot 300 ℃ when latus rectum is the above valve built-up welding of DN300, thereby has improved working condition widely.The present invention can be widely used in nominal pressure PN≤20MPa, temperature t≤570 ℃, and acid, alkali, salt etc. are than strong corrosive media, the close surface build-up welding of large, medium and small type high temperature corrosion resisting valve of carbon steel, heat resisting steel, stainless steel, high-temperature steel.
The present invention has the advantages that wear resistance at elevated temperature is good and cracking resistance is good.Its mechanism is: by normal temperature metallographic and the pattern inspection of high power electron microscopic replica and adopt Electronic Speculum and X-ray diffraction analysis result to learn, the microstructure of overlay cladding is to be base (r) with the Ovshinsky, contain a little ferrite (a), second is with bone network shape and netted eutectic boride (Fe mutually
2B, Cr
2B) the bone network shape of hard phase and netted eutectic boride are distributed in crystal boundary, form wear-resisting skeleton, and boride has higher hardness and wearability than carbide, and boron also is that very strong molten admittedly invigoration effect is arranged simultaneously, and it replaces M
23C
6Portion C in the type carbide has suppressed M
23C
6High temperature is assembled down in the carbide, and high temperature hardness is remained unchanged, and units such as Cr, W, Mo, Si have solution strengthening and precipitation strength effect in the hardfacing alloy, make this material that very high high temperature abrasion resistance be arranged, and this specific character is confirmed by result of the test.Boron significantly improves the high-temperature behavior of austenitic stainless steel.Mo and W are the red hardness element simultaneously, and its adding has improved the heat endurance and the high temperature hardness of overlay cladding.The adding of Mo and elements such as w has the post-curing effect, makes overlay cladding that good heat endurance be arranged.Because this welding rod deposited metal is the Cr-Mn-Mo-W-V-B alloy, matrix is an austenite structure, contains the hard phase, does not contain martensitic structure; Higher owing to containing the Mn amount simultaneously, improved the ability of desulfurization greatly, the inferior result of laboratory test of hundreds of confirms, the deposited metal sulfur content is very low, general all below 0.03%, because the coating raw material are all selected simple metal such as materials such as electrolytic manganese, pure tungsten powder for use, make the phosphorus content of deposited metal also very low, generally be no more than 0.02%, all these impel deposited metal to have good crack resistance.This point is to built-up welding production, and to guaranteeing the high-temperature corrosion-resistant valve sealing surface serviceability, meaning is very great.
The coating recipe of table one high temperature corrosion resisting valve surfacing welding
| The welding rod title | The welding wire trade mark | Marble | Fluorite | Titanium dioxide | Quartz sand | Titanium-iron powder | Electrolytic manganese | The molybdenum-iron powder | Tungsten powder | Silicon closes the chromium gold | Boron carbide | Vanadium iron powder | Soda ash | Water yield glass accounts for the dried powder that adds of glass and goes into % |
| Novel | HlCr13 | 20 ～ 24 | 11 ～ 15 | 2 ～ 5 | 1 ～ 4 | ??1 ??～ ??2.7 | ??13 ??～ ??17 | 7 ～ 9.5 | 2 ～ 5 | 19 ～ 23 | 1 ～ 4 | 5 ～ 8 | ??0.2 ??～ ??0.6 | 10～13 |
Table two new type of electrode raw material and the requirement of HlCr13 wire composition
| The raw material title | Composition requires (%) | Granularity |
| Marble | ??CaCo 3≥92???S≤0.04???????P≤0.015 | Cross 80 mesh sieves |
| Fluorite | ??CaF 2≥92????S≤0.10???????P≤0.015 | Cross 80 mesh sieves |
| Titanium dioxide | ??TiO 2≥98????S≤0.012??????P≤0.015 | Cross 200 mesh sieves |
| Silica flour | ??SiO 2〉=97 other impurity≤3.0 | Cross 80 mesh sieves |
| Titanium-iron powder | ??Ti≥20???????Cu≤4.0???????C≤0.20 | Cross 50 mesh sieves |
| Electrolytic manganese | ??Mn≥98?????????????????????C≤0.10 | Cross 50 mesh sieves |
| The molybdenum-iron powder | ??Mo≥60～72???C＝.05～0.15??Si＝0.3～0.8 | Cross 50 mesh sieves |
| Tungsten powder | W 〉=99 (technical pure) | Cross 200 mesh sieves |
| Silicochromium | ??C≤0.2???????Cr＝54～60????Si＝6～8 | Cross 50 mesh sieves |
| Vanadium iron powder | ??C＝0.2～0.35?Si＝1.5-1.8???W＝54-57 | Cross 50 mesh sieves |
| Soda ash | Technical pure (Na 2Co 3) | Cross 80 mesh sieves |
| Boron carbide | ??B 4The total B in the C 〉=96 〉=free C=0.5-1.1 of the 80 free total C=16-19 of B=0.05-0.2 | Cross 70 mesh sieves |
| Waterglass | ??SiO 2＝25-39?Na 2All the other are water for O=10-13.5 S≤0.07 P≤0.07, concentration 37～40 degree | Modulus M=2.6～3.0 |
| The HlCr13 welding wire | ??C≤0.12??????Mn＜0.06??????Si≤0.50 ??Cr＝11.5～13.5??S≤0.03????P≤0.003 | Φ3.2mm Φ4.0mm Φ5.0mm |
| Remarks | Φ 3.2 core welding rod external diameter mould 6.5mm, Φ 4.0 core welding rod external diameter mould 8.0mm; Φ 5.0 core welding rod external diameter mould 10.5mm | |
Table three welding rod deposited metal composition and hardness range table
| The built-up welding parent metal | Deposited metal composition (%) | Hardness (HRC) | Layer height (mm) | |||||||||
| ????C | ??Si | ??Mn | ??Cr | ???B | ??Mo | ???W | ???V | ???S | ???P | |||
| 18～8 | ??0.25 ??0.40 | ??1.5 ??～ ??2.5 | ??7.0 ??～ ??9.0 | ??14.0 ??～ ??18.0 | ??0.7 ??～ ??1.1 | ??2.5 ??～ ??4.5 | ??1.5 ??～ ??2.8 | ??1.5 ??～ ??2.5 | Less than 0.02 | Less than 0.03 | ????33 ????～ ????40 | 2-2.5 |
| 25 steel or WCB | ??0.25 ??0.40 | ??1.5 ??～ ??2.5 | ??7.0 ??～ ??9.0 | ??4.0 ??～ ??18.0 | ??0.7 ???～ ??1.1 | ??2.5 ??～ ??4.0 | ??1.5 ??～ ??2.8 | ??1.5 ??～ ??2.5 | Less than 0.02 | Less than 0.03 | ????33 ????～ ????40 | 2-2.5 |
From the coating recipe of this invention as can be known, this prescription belongs to high alloy thick covering basic electrode.Basic coating prescription welding rod all adopts the production of hydraulic oil pressure welding bar coating machine extrusion.
Embodiment one:
Compacting Φ 3.2mm core wire.
The composition strict inspection raw material composition and the granularity of giving according to table two, qualified fully after, weigh (unit K g) marble 24, fluorite 15 by prescription, titanium dioxide 5, quartz sand 4, titanium-iron powder 2.7, electrolytic manganese, molybdenum-iron powder 9, tungsten powder 2, silicochromium 19, boron carbide 1, vanadium iron powder 5, soda ash 0.3.After weighing respectively, various materials all are placed on claim gross weight on the scale, the gross weight of each individual event material and welding agent are joined the powder amount when identical, just allow to do to mix, do the raw material that mix and in mixer, stir, make every effort to stir, will stir uniform dry powder and add 10Kg waterglass again, continue wet the stirring, wet mixing time is made every effort to wet-milling and is stirred.Adopt Φ 3.2mmH08A core wire to adopt Φ 6.5mm welding rod external diameter mould, the pressure of extrusion press is selected for use between 4～10MPa according to the quantity and the different quality that add waterglass.Present embodiment adopts 4MPa, after the compacting, and natural airing 24 hours, put into 300 ℃ of oven dry kiln dryinies then, to produce 3～4 layers of the built-up welding on the WCB workpiece of good welding rod at last, get chemical examination degree material, chemically examine composition in overlay cladding 3mm eminence inspection hardness at overlay cladding 3mm place car.Composition and hardness are the key technical indexes of checking and accepting welding rod, are finished product after the acceptance(check).
Embodiment two:
Compacting Φ 4.mm core wire.
According to strict the selecting materials of composition that table two is given, qualified after, by prescription weigh (unit K g), marble 21.9, fluorite 13.5, titanium dioxide 3.4, quartz sand 2.5, titanium-iron powder 1.7, electrolytic manganese 15.1, molybdenum-iron powder 8.4, tungsten powder 3.4, silicochromium 21.0, boron carbide 2.5, vanadium iron powder 6.2, soda ash 0.4 after weighing respectively, all is placed on various materials and claims gross weight on the scale, the gross weight of each individual event material and welding agent are joined the powder amount when identical, put into dry-mixed machine and stir, evenly after, dry powder is added 12Kg waterglass, continue wet the stirring, carry out the welding rod compacting after evenly.The pressure 5MPa of extrusion press, adopt Φ 4mmH08A core wire to adopt Φ 8.0mm welding rod external diameter mould, behind the extrusion, nature airing 24 hours, put into 300 ℃ of oven dry kiln dryinies then, to produce 3～4 layers of the built-up welding on the WCB workpiece of good welding rod at last, and get the chemical examination test portion at overlay cladding 3mm place car, the chemical examination composition is in overlay cladding 3mm eminence inspection hardness.Be finished product after the acceptance(check).
Embodiment three:
Compacting Φ 5.0mm core wire.
Technical process is the same, and the contained composition of coating is (unit of weight is Kg), marble 20, fluorite 11, titanium dioxide 2, quartz sand 1, titanium-iron powder 1.4, electrolytic manganese 17, molybdenum-iron powder 7, tungsten powder 5, silicochromium 23, boron carbide 4, vanadium iron powder 8, soda ash 0.6 adopts Φ 10.5mm welding rod external diameter mould, 300 ℃ of oven dry kiln dryinies.
Claims (2)
1. welding rod for high-temperature corrosion-resistant valve sealing surface build-up welding, the coating composition comprises marble, fluorite, titanium dioxide, quartz sand, ferrotianium, electrolytic manganese, the molybdenum-iron powder, tungsten powder, silicochromium, boron carbide, vanadium iron, soda ash, waterglass, it is characterized in that, this covering of an electrode composition consists of: marble 20～24%, fluorite 11～15%, titanium dioxide 2～5%, quartz sand 1～4%, ferrotianium 1～2.7%, electrolytic manganese 13～17%, molybdenum-iron powder 7～9.5%, tungsten powder 2～5%, silicochromium 19～23%, boron carbide 1～4%, vanadium iron powder 5～8%, soda ash 0.2～0.6%, waterglass are 10～13% of dry powder gross weight.
2. according to the described welding rod for high-temperature corrosion-resistant valve sealing surface build-up welding of claim 1, it is characterized in that described coating consists of: marble 21.9%, fluorite 13.5%, titanium dioxide 3.4%, quartz sand 2.5%, ferrotianium 1.7%, electrolytic manganese 15.1%, molybdenum-iron powder 8.4%, tungsten powder 3.4%, silicochromium 21%, boron carbide 2.5%, vanadium iron powder 6.2%, soda ash 0.4%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95112091A CN1063376C (en) | 1995-10-31 | 1995-10-31 | Welding rod for high-temperature corrosion-resistant valve sealing surface build-up welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95112091A CN1063376C (en) | 1995-10-31 | 1995-10-31 | Welding rod for high-temperature corrosion-resistant valve sealing surface build-up welding |
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| Publication Number | Publication Date |
|---|---|
| CN1149521A true CN1149521A (en) | 1997-05-14 |
| CN1063376C CN1063376C (en) | 2001-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95112091A Expired - Fee Related CN1063376C (en) | 1995-10-31 | 1995-10-31 | Welding rod for high-temperature corrosion-resistant valve sealing surface build-up welding |
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| CN (1) | CN1063376C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867211A (en) * | 2013-12-12 | 2014-06-18 | 中铁十四局集团有限公司 | Slurry shield cutter head washing system |
| CN104476013A (en) * | 2014-10-31 | 2015-04-01 | 河海大学常州校区 | Tungsten-strengthened wear-resisting surfacing electrode and preparation method thereof |
| CN105710564A (en) * | 2016-04-22 | 2016-06-29 | 广州市白云区鑫钻耐磨材料厂 | Hardfacing electrode coating and electrode containing same |
| USRE46387E1 (en) | 1998-09-11 | 2017-05-02 | Genesys Telecommunications Laboratories, Inc. | Method and apparatus for extended management of state and interaction of a remote knowledge worker from a contact center |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU502732A1 (en) * | 1974-04-11 | 1976-02-15 | Уральский ордена Трудового Красного Знамени политехнический институт им.С.М.Кирова | The composition of the electrode coating for surfacing |
| SU656782A1 (en) * | 1975-11-26 | 1979-04-15 | Предприятие П/Я Р-6762 | Electrode coating |
| BR8507159A (en) * | 1985-01-17 | 1987-07-14 | Ki Polt I | ELECTRIC FOR FORMING ELECTRIC ARC |
| CN85200499U (en) * | 1985-04-01 | 1985-12-20 | 长沙矿山研究院 | Wear-resistant alloy welding rod |
| CN86101070B (en) * | 1986-01-27 | 1988-09-07 | 沈阳高中压阀门厂 | Flux for automatic overlaying welding on sealing surface of valve |
| CN1027872C (en) * | 1992-11-14 | 1995-03-15 | 湘潭大学 | High-hardness wear-proof welding electrode without preheating |
-
1995
- 1995-10-31 CN CN95112091A patent/CN1063376C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE46387E1 (en) | 1998-09-11 | 2017-05-02 | Genesys Telecommunications Laboratories, Inc. | Method and apparatus for extended management of state and interaction of a remote knowledge worker from a contact center |
| CN103867211A (en) * | 2013-12-12 | 2014-06-18 | 中铁十四局集团有限公司 | Slurry shield cutter head washing system |
| CN103867211B (en) * | 2013-12-12 | 2015-11-11 | 中铁十四局集团有限公司 | Slurry shield cutterhead flushing system |
| CN104476013A (en) * | 2014-10-31 | 2015-04-01 | 河海大学常州校区 | Tungsten-strengthened wear-resisting surfacing electrode and preparation method thereof |
| CN105710564A (en) * | 2016-04-22 | 2016-06-29 | 广州市白云区鑫钻耐磨材料厂 | Hardfacing electrode coating and electrode containing same |
| CN105710564B (en) * | 2016-04-22 | 2018-09-07 | 广州鑫钻新材料科技开发有限公司 | A kind of hardfacing electrode coating and the welding rod containing the coating |
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| Publication number | Publication date |
|---|---|
| CN1063376C (en) | 2001-03-21 |
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