CN102225495B - Surfacing flux-cored wire and method for enhancing tenacity of surfacing deposited metal - Google Patents
Surfacing flux-cored wire and method for enhancing tenacity of surfacing deposited metal Download PDFInfo
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- CN102225495B CN102225495B CN 201110143607 CN201110143607A CN102225495B CN 102225495 B CN102225495 B CN 102225495B CN 201110143607 CN201110143607 CN 201110143607 CN 201110143607 A CN201110143607 A CN 201110143607A CN 102225495 B CN102225495 B CN 102225495B
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Abstract
The invention provides a surfacing flux-cored wire which is characterized by being prepared from a steel strip and the following flux core raw materials: in each 1000 g of flux core raw materials, 90 g of chromium carbide, 20 g of vanadium carbide, 20 g of niobium carbide, 30 g of ferrovanadium, 54 g of ferrocolumbium, 100 g of chromium powder, 120 g of nickel, 16 g of molybdenum, 21 g of 75 ferrosilicon, 50 g of manganese, and 479 g of iron powder. The invention also provides a method for enhancing the tenacity of a surfacing deposited metal through surfacing by virtue of the surfacing flux-cored wire. The method is capable of changing the different addition forms and amounts of carbides of alloys to the surfacing flux-cored wire without changing the content of the alloys of the surfacing deposited metal, thus changing the micro-morphology of martensite and improving the tenacity of the surfacing deposited metal.
Description
Technical field
The present invention relates to a kind of flux-cored wire, particularly a kind of flux-cored wire for the composite manufacturing by hard surfacing technology.
Background technology
Roll is one of main consumption spare part during steel rolling is produced, steel rolling technology is along with the development of stocking material, improving constantly of rolling mill speed and automaticity, the breaker roll quality particularly aspects such as intensity, toughness, wearability and anti-coarse performance of roll has also proposed requirements at the higher level, and the visible trend of roll material development is hardness or the quench-hardened case thickness that is widely used alloying element and improves gradually alloying level, roll.
The compound manufacturing again of built-up welding is an important branch in welding technology field, is a kind of sufacing treatment process method.From 20 century 70s, along with the extensive application of flux-cored wire and multi-wire submerged-arc technique for overlaying, the composite manufacturing by hard surfacing technology of metallurgy roller has obtained fast development.
At present, the metallurgy roller class that adopts the composite manufacturing by hard surfacing technology to produce has reached tens kinds, the Cr5 alloy system be add Mo, Nb (W) on martensitic matrix, the units such as V, Co usually strengthen matrix, case hardness can reach the 70HS left and right, have good wearability and higher mechanical performance concurrently, become the main alternative of present rolling mill for hot rolled planks and strips roll repair materials.But in high alloy, the Cr5 alloy system is mainly martensitic structure, and the performance of hardening is strong, is prone to defects i.e.cracks in weld deposit process.Heavy alloyed hard-face overlaying welding has very complete description of materials and perfect process conditions at home and abroad, do not satisfy high rigidity (＞55HRC) the built-up welding requirement of roll but have a kind of product to stablize, essential reason is that the obdurability of resurfacing welding material is not enough, improve with intensity, the toughness of built-up welding deposited metal descends, and easily cracks in weld deposit process or in use procedure.
The Strengthening and Toughening problem is the theme that ferrous materials research is paid close attention to always, the resurfacing welding material researcher is by the principle of strengthening and toughening of ferrous materials, the resurfacing welding material Strengthening and Toughening a series of researchs have also been carried out, many Strengthening and Toughening approach have been proposed, as: crystal grain thinning, rotten processing or formation retained austenite are improved toughness, have played certain effect to improving the deposited metal crack resistance.Although these modes can be improved intensity and toughness, but be mainly by adding valuable refractory metal or heat treatment method, and changed the alloying component in the built-up welding deposited metal, cause sometimes some negative effect factors, theory as toughness reinforcing in retained austenite is once prevailing, but can cause the decline of heat fatigue and anti-wear performance, so its limitation is arranged.
The present invention is in the high-rigidity resurfacing welding deposited metal, in the situation that keep built-up welding deposited metal alloying component constant, improves the obdurability of built-up welding deposited metal by changing martensitic microstructure.Changing martensitic microstructure and be than microalloy, carbon drop, fall the more economical and better mode of result of use of sulphur phosphorus, be specially adapted to the hardfacing alloy system of high rigidity, is the new way of built-up welding deposited metal Strengthening and Toughening.
Summary of the invention
Main purpose of the present invention is to provide a kind of novel flux-cored wire, thereby a kind of new way of built-up welding deposited metal Strengthening and Toughening is provided.
For achieving the above object, the present invention adopts following technical scheme:
A kind of flux-cored wire, wherein, it is to be prepared from by steel band with the prescribe medicine core raw material:
Contain in every 1000 gram medicine core raw materials: chromium carbide 90 grams, vanadium carbide 20 grams, niobium carbide 20 grams, vanadium iron 30 grams, ferro-niobium 54 grams, chromium powder 100 grams, nickel 120 grams, molybdenum 16 grams, 75 ferrosilicon 21 grams, manganese 50 grams, iron powder 479 grams.
A kind of flux-cored wire, wherein, it is to be prepared from by steel band with the prescribe medicine core raw material:
Contain in every 1000 gram medicine core raw materials: chromium powder 176 grams, vanadium carbide 30 grams, niobium carbide 60 grams, vanadium iron 14 grams, nickel 120 grams, molybdenum 16 grams, 75 ferrosilicon 21 grams, manganese 50 grams, iron powder 505 grams, graphite 8 grams.
Flux-cored wire as above, wherein, in described medicine core raw material:
In the raw material vanadium iron, content of vanadium is 50～60wt%, and iron content is 38～48wt%, and all the other are impurity;
In the raw material ferro-niobium, content of niobium is 56～66wt%, and iron content is 30～40wt%, and all the other are impurity;
In raw material 75 ferrosilicon, silicone content is 74～79wt%, and iron content is 20～25wt%, and all the other are impurity.
Flux-cored wire as above, wherein, in described medicine core raw material, the purity of each component is:
In the raw material chromium carbide, chromium carbide＞82wt%; In the raw material vanadium carbide, vanadium carbide＞96wt%; In the raw material niobium carbide, niobium carbide＞98wt%; In the raw material chromium powder, chromium powder＞98wt%; In raw material nickel, nickel＞98wt%; In the raw material molybdenum, molybdenum＞98wt%; In raw material manganese, manganese＞99wt%; In the raw material iron powder, iron＞98wt%; In raw material graphite, carbon＞96wt%.
Flux-cored wire as above, wherein, the percentage that described medicine core raw material accounts for the flux-cored wire gross weight is 20～36wt%.
Flux-cored wire as above, wherein, described steel band is preferably the carbon steel steel band.
Flux-cored wire as above, wherein, described steel band is preferably the carbon steel steel band of model H08A.
Flux-cored wire as above, wherein, described steel band is preferably dimensioned to be: thickness * width=0.5～0.9mm * 12～16mm.
Flux-cored wire as above, wherein, it is to be prepared from by the following method:
A. mix in meal mixer according to the powder of formula with each component of medicine core raw material, obtain mixed powder;
B. on wire rolling mill, steel band is rolled into the cross section and takes the shape of the letter U, dose the mixed powder that obtains in step a in the U-shaped groove of steel band, subsequently the U-shaped steel band is rolled into the welding wire base pipe of diameter 3mm～5mm;
C. with wire drawing machine with welding wire base pipe drawing to diameter 2.4mm～4.0mm, divide around the standard treppenwicklung with layer winder subsequently, namely obtain the finished product of described flux-cored wire.
Flux-cored wire as above, wherein, described wire drawing machine is preferably multi-joint straight-line machine.
A kind of method that improves the obdurability of built-up welding deposited metal, it is to adopt flux-cored wire as above to carry out built-up welding.
Beneficial effect of the present invention is:
In the built-up welding deposited metal that tradition built-up welding carbon is strengthened, flux-cored wire mainly adds chromium carbide to strengthen the built-up welding deposited metal.And in the present invention, keeping under the constant prerequisite of built-up welding deposited metal alloy content, add form by the difference that changes carbide in flux-cored wire: 1, directly add chromium carbide; 2, add graphite and chromium powder; Thereby change the martensite microscopic pattern, improve the toughness and tenacity of built-up welding deposited metal.
Description of drawings:
Fig. 1 is the martensitic structure form photo of the flux-cored wire that obtains of Comparative Examples of the present invention.
Fig. 2 is the martensitic structure form photo of the flux-cored wire that obtains of the embodiment of the present invention 2.
The specific embodiment
Under the constant prerequisite of the alloy content that keeps the built-up welding deposited metal, add form and quantity by changing alloy difference of carbide in flux-cored wire, thereby change the martensite microscopic pattern in the present invention, improve the toughness and tenacity of built-up welding deposited metal.Steel band can adopt the ordinary carbon steel steel band, and usually using model is H0gA, and size most preferably adopts: 0.6mm (thickness) * 14mm (width), medicine core account for the welding wire counterweight than the preferred 30wt% of employing.
Comparative Examples (technical scheme of prior art): contain in every 1000 gram medicine core raw materials: chromium carbide: 150 grams, chromium powder: 50 grams, vanadium iron: 60 grams, ferro-niobium: 80 grams, nickel: 120 grams, molybdenum: 16 grams, 75 ferrosilicon: 21 grams, manganese: 50 grams, iron powder: 453 grams.
Embodiment 1 (technical solution of the present invention 1): contain in every 1000 gram medicine core raw materials: chromium carbide: 90 grams, vanadium carbide: 20 grams, niobium carbide: 20 grams, vanadium iron: 30 grams, ferro-niobium: 54 grams, chromium powder: 100 grams, nickel: 120 grams, molybdenum: 16 grams, 75 ferrosilicon: 21 grams, manganese: 50 grams, iron powder: 479 grams.
Embodiment 2 (technical solution of the present invention 2): contain in every 1000 gram medicine core raw materials: chromium powder: 176 grams, vanadium carbide: 30 grams, niobium carbide: 60 grams, vanadium iron: 14 grams, nickel: 120 grams, molybdenum: 16 grams, 75 ferrosilicon: 21 grams, manganese: 50 grams, iron powder: 505 grams, graphite: 8 grams.
Mix in meal mixer according to the formula of Comparative Examples and the embodiment powder with each constituent; On wire rolling mill, steel band is rolled into the cross section and takes the shape of the letter U, dose mixed powder in the U-shaped groove of steel band, subsequently the U-shaped steel band is rolled into the welding wire base pipe of Φ 3mm～5mm; With multi-joint linear drawing machine with welding wire base pipe drawing to finished size Φ 2.4mm～4.0mm, divide around the standard treppenwicklung with layer winder subsequently.
Above-mentioned three groups of flux-cored wires of making label successively are: 1#, 2#, 3#.Under identical bead-welding technology, three kinds of welding wires carry out the multiple tracks multiple-bead deposit respectively on the test plate (panel) that is of a size of 250mm * 150mm * 25mm (length * wide * height), and the built-up welding width is 70mm, and thickness is the bead weld specimen of 22mm.After test plate (panel) built-up welding slow cooling, sample is produced on the deposited metal surface on test plate (panel), measures built-up welding intensity and toughness, and depth selection must not surpass the 3rd layer of deposited metal, the relation between its mechanical property and microcosmic martensitic structure is measured in observation, and measures the chemical composition of built-up welding deposited metal.
After built-up welding, the chemical composition of built-up welding deposited metal remains unchanged, and is as shown in table 1.
The chemical composition (wt%) of table 1 built-up welding deposited metal
| C | Cr | V | Ni | MO | Mn | SI | Nb | Fe | |
| 1# | 0.52 | 5.28 | 0.91 | 3.62 | 0.48 | 1.21 | 0.51 | 1.44 | Surplus |
| 2# | 0.51 | 5.21 | 0.87 | 3.59 | 0.44 | 1.26 | 0.49 | 1.42 | Surplus |
| 3# | 0.54 | 5.29 | 0.89 | 3.60 | 0.46 | 1.20 | 0.50 | 1.40 | Surplus |
By table as seen: 1#, 2#, the chemical composition of 3# built-up welding deposited metal is consistent.
The martensite substructure structure and morphology of Comparative Examples and embodiment 2 is distinguished as depicted in figs. 1 and 2, the straight martensite bundle tissue of the flux-cored wire that Fig. 1 visual contrast example is made; The staggered martensite bundle tissue of the flux-cored wire that the visible embodiment 2 of Fig. 2 makes.The technical scheme of contrast 1# and 3# and Fig. 1 and microstructure shown in Figure 3 be as can be known: the mode that adds that changes carbide, in the built-up welding deposited metal, change has occured in matensite substructure, be transformed into the staggered lath martensite bundle of 3# by the straight lath martensite bundle of 1#, and the twin tissue reduces obviously.
The relation of morphology of martensite and mechanical property is as shown in table 2.
The relation of the identical martensite substructure of table 2 built-up welding deposited metal and mechanical property
By as seen from Table 2, hardness and the Strength Changes of built-up welding deposited metal are little, but toughness is greatly improved: the staggered toughness of organizing of martensite bundle is brought up to 15J from 6J, and the application of the high rigidity hardfacing alloy such as intensity and firmness change are little, satisfy pinch roll fully, help winding up roller, dark roller.
Under the prerequisite that the built-up welding deposited metal remains unchanged, add the form of alloy can produce the martensitic structure of the better alternative form of toughness by control, and the twin tissue is reduced, significantly improve the toughness of built-up welding deposited metal.Add form so control, the martensite substructure that reduces twin tissue and the staggered shape of generation is a kind of new mode that improves high-rigidity resurfacing welding deposited metal obdurability.
Claims (8)
1. a flux-cored wire, is characterized in that, it is to be prepared from by steel band with the prescribe medicine core raw material:
Contain in every 1000 gram medicine core raw materials: chromium carbide 90 grams, vanadium carbide 20 grams, niobium carbide 20 grams, vanadium iron 30 grams, ferro-niobium 54 grams, chromium powder 100 grams, nickel 120 grams, molybdenum 16 grams, 75 ferrosilicon 21 grams, manganese 50 grams, iron powder 479 grams.
2. a flux-cored wire, is characterized in that, it is to be prepared from by steel band with the prescribe medicine core raw material:
Contain in every 1000 gram medicine core raw materials: chromium powder 176 grams, vanadium carbide 30 grams, niobium carbide 60 grams, vanadium iron 14 grams, nickel 120 grams, molybdenum 16 grams, 75 ferrosilicon 21 grams, manganese 50 grams, iron powder 505 grams, graphite 8 grams.
3. flux-cored wire as claimed in claim 1 or 2, is characterized in that, the percentage that described medicine core raw material accounts for the flux-cored wire gross weight is 20～36wt%.
4. flux-cored wire as claimed in claim 1, is characterized in that, in described medicine core raw material:
In the raw material vanadium iron, content of vanadium is 50～60wt%, and iron content is 38～48wt%, and all the other are impurity;
In the raw material ferro-niobium, content of niobium is 56～66wt%, and iron content is 30～40wt%, and all the other are impurity;
In raw material 75 ferrosilicon, silicone content is 74～79wt%, and iron content is 20～25wt%, and all the other are impurity.
5. flux-cored wire as claimed in claim 2, is characterized in that, in described medicine core raw material:
In the raw material vanadium iron, content of vanadium is 50～60wt%, and iron content is 38～48wt%, and all the other are impurity;
In raw material 75 ferrosilicon, silicone content is 74～79wt%, and iron content is 20～25wt%, and all the other are impurity.
6. flux-cored wire as claimed in claim 1 or 2, is characterized in that, described steel band is the carbon steel steel band.
7. flux-cored wire as claimed in claim 1 or 2, is characterized in that, described steel band is of a size of: thickness * width is 0.5～0.9mm * 12～16mm.
8. a method that improves the obdurability of built-up welding deposited metal, is characterized in that, adopts flux-cored wire as claimed in claim 3 to carry out built-up welding.
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| CN 201110143607 CN102225495B (en) | 2011-05-30 | 2011-05-30 | Surfacing flux-cored wire and method for enhancing tenacity of surfacing deposited metal |
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| CN 201110143607 CN102225495B (en) | 2011-05-30 | 2011-05-30 | Surfacing flux-cored wire and method for enhancing tenacity of surfacing deposited metal |
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| CN102225495A CN102225495A (en) | 2011-10-26 |
| CN102225495B true CN102225495B (en) | 2013-06-19 |
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| CN103192197B (en) * | 2013-03-21 | 2015-12-02 | 中冶焊接科技有限公司 | Capping resurfacing welding material of a kind of composite manufacturing by hard surfacing working roll and preparation method thereof |
| US10646965B2 (en) | 2015-08-11 | 2020-05-12 | Hobart Brothers Llc | Tubular welding wire with a thinner sheath for improved deposition rates |
| CN107538150A (en) * | 2017-08-26 | 2018-01-05 | 芜湖鼎瀚再制造技术有限公司 | Mine engineering mechanical implement reparation fe-based self-fluxing alloy powder and its welding procedure |
| CN109967913B (en) * | 2019-01-17 | 2021-06-04 | 北京奥邦新材料有限公司 | Flux-cored wire for laser cladding of continuous casting roller and production method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1476021A (en) * | 1974-09-06 | 1977-06-10 | Soudure Autogene Elect | Flux-cored wire electrode for vertical automatic gas-shielded welding |
| CN101224527A (en) * | 2008-02-04 | 2008-07-23 | 湘潭大学 | High hardness ferritic stainless steel wearable surfacing flux-cored wire |
| CN101406994A (en) * | 2007-10-10 | 2009-04-15 | 中冶集团建筑研究总院 | High-carbon high-chromium high-niobium cast iron self-protecting flux-cored wire |
| JP2010188387A (en) * | 2009-02-19 | 2010-09-02 | Nippon Steel & Sumikin Welding Co Ltd | Flux cored wire for welding duplex stainless steel |
| CN102069317A (en) * | 2010-12-08 | 2011-05-25 | 燕山大学 | Self-protection flux-cored wire for rare earth type high-chromium cast iron by open arc |
-
2011
- 2011-05-30 CN CN 201110143607 patent/CN102225495B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1476021A (en) * | 1974-09-06 | 1977-06-10 | Soudure Autogene Elect | Flux-cored wire electrode for vertical automatic gas-shielded welding |
| CN101406994A (en) * | 2007-10-10 | 2009-04-15 | 中冶集团建筑研究总院 | High-carbon high-chromium high-niobium cast iron self-protecting flux-cored wire |
| CN101224527A (en) * | 2008-02-04 | 2008-07-23 | 湘潭大学 | High hardness ferritic stainless steel wearable surfacing flux-cored wire |
| JP2010188387A (en) * | 2009-02-19 | 2010-09-02 | Nippon Steel & Sumikin Welding Co Ltd | Flux cored wire for welding duplex stainless steel |
| CN102069317A (en) * | 2010-12-08 | 2011-05-25 | 燕山大学 | Self-protection flux-cored wire for rare earth type high-chromium cast iron by open arc |
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Effective date of registration: 20210129 Address after: 100088 Beijing city Haidian District Xitucheng Road No. 33 Patentee after: CHINA JINGYE ENGINEERING Co.,Ltd. Patentee after: CENTRAL RESEARCH INSTITUTE OF BUILDING AND CONSTRUCTION CO., LTD. MCC Group Address before: 101106 No.2, liangliwu street, East District, Tongzhou Economic Development Zone, Tongzhou District, Beijing Patentee before: ZHONGYE WELDING TECHNOLOGY Co.,Ltd. Patentee before: CENTRAL RESEARCH INSTITUTE OF BUILDING AND CONSTRUCTION CO., LTD. MCC Group |
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