CN100381245C - Self-protecting dot and bead welding wire with metal core - Google Patents
Self-protecting dot and bead welding wire with metal core Download PDFInfo
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- CN100381245C CN100381245C CNB2006100579931A CN200610057993A CN100381245C CN 100381245 C CN100381245 C CN 100381245C CN B2006100579931 A CNB2006100579931 A CN B2006100579931A CN 200610057993 A CN200610057993 A CN 200610057993A CN 100381245 C CN100381245 C CN 100381245C
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Abstract
The present invention belongs to the welding field of material processing engineering. The present invention relates to a spot resurfacing welding protective coating with wear resistance, which is mainly applied to coal grinding rollers, cold and hot rolls of cast iron and boiler pipelines. Patents and literature reports, which are relative to the development of the self-protective spot resurfacing welding solder wire with a metal core, are not discovered at home and abroad. Ventilation is required in the production process of the existing spot resurfacing welding, continuous operation can not be realized, and under cut, air holes and other defects easily occur during the resurfacing welding. The metal core of the solder wire of the present invention comprises substances of the percentages by weight: 40 to 60% of high-carbon ferrochrome, 5 to 15% of ferromolybdenum, 5 to 15% of siliconmanganese, 2 to 5% of ferrotitanium, 2 to 5% of aluminum-magnesium alloy, 2 to 5% of ferroboron and iron powder as the rest. The preparation method of the present invention adopts the prior art which is shown in the specification. The present invention provides a self-protective spot resurfacing welding solder wire with a metal core, which has the advantages of low cost, the capability of automatic operation realization and high wear resistance. Welding spots of spot resurfacing welding do not have the defects of under cut, air holes, etc.
Description
Technical field
A kind of self-protecting dot and bead welding wire with metal core belongs to the welding field in the Materials Processing Engineering, and this invention is mainly used in the some build-up wear-resistant protective coating of coal-grinding roller, cast iron cold (heat) roll, boiler tubing.
Background technology
Cold (heat) roll generally adopts the cast iron manufacturing, and poor because of its weldability, carrying out built-up welding on its surface has certain difficulty, if adopt the mild steel arc welding electrode or the welding wire that generally use will influence its bond strength and wearability.Foreign technology advanced person's country all is devoted to develop oneself cast iron roll shell built-up welding welding rod special for special and welding wire, and makes corresponding welding procedure, has obtained good effect, obtains general application.From the nineties initial stage, China has carried out preliminary research in this regard, has obtained some experiences, but is still having a certain distance with external advanced roll technology through the roll that a built-up welding is handled aspect serviceability, the working life.
Metal core welding wire is the international in recent years new trend that develops.Metal core welding wire is for slag type flux-cored wire, and its powder core major part is a metal powder, has only a spot of arc stabilizer and slag former.Self-protecting dot and bead welding wire with metal core and real core or common flux-cored wire are compared, and mainly have following characteristics:
1. face of weld does not have slag, need not scarfing cinder in continuous sequence, can uninterruptedly weld in process of production.
2. need not to add protective gas, need not consider the ventilation problem in process of production.
3. hot input quantity is little in the some weld deposit process, and it is little that the breaker roll original structure produces stress, does not influence the original structure of matrix.
4. solder joint of built-up welding only need be less than one second time in the some weld deposit process, and the solder joint that built-up welding goes out in the so short time does not have defectives such as undercut, pore, and with the substrate combinating strength height, hardness height, wearability are good.
5. adopt the open arc built-up welding, cost is low, good economy performance.
6. can solve grain roll, boiler tubing wear problem, not influence its wearability of raising under the prototype structure situation.
Relevant patent and bibliographical information are not seen in the development of self-protecting dot and bead welding wire with metal core at home, abroad as yet.Need ventilation in the existing some built-up welding production process, can not realize working continuously, and the solder joint that built-up welding goes out is prone to defectives such as undercut, pore.
Summary of the invention
Problem to be solved by this invention is to overcome the problem that exists in the conventional stack soldering method, a kind of low cost is provided, can realizes the wearable, self-protecting metal cored dot and bead welding wire of automated job.
A kind of self-protecting dot and bead welding wire with metal core; it is characterized in that the described metal-cored following substances by mass percent that comprises: high carbon ferro-chrome 40%-60%, molybdenum-iron 5%-15%, silicomangan 5%-15%, ferrotianium 2%-5%, almag 2%-5%, ferro-boron 2%-5%, iron powder surplus.
Its each composition effect and content are as follows: high carbon ferro-chrome: to the weld metal transition alloy elements.
Molybdenum-iron: to the weld metal transition alloy elements.
Silicomangan: to the weld metal transition alloy elements, deoxidation, formation protective atmosphere.
Ferrotianium: deoxidation, denitrogenation, crystal grain thinning improves toughness.
Almag: deoxidation, denitrogenation form protective atmosphere.
Ferro-boron: to the weld metal transition alloy elements.
Preparation method of the present invention adopts prior art, as shown in Figure 1, may further comprise the steps:
1, the mild steel steel band is rolled into U-shaped, in U-lag, add the powder core powder of the present invention of the 30-35% that accounts for Spray Wire gross weight of the present invention again;
2, U-lag is healed up, make powder core parcel wherein,,, make its diameter reach 1.2mm at last, obtain final products by road drawing, tube reducing by wire drawing die.
Use self-protecting dot and bead welding wire with metal core provided by the present invention cane milling roll shell is carried out a built-up welding reparation, the roll wearability after the reparation is good, the gripping cane capacity height.As shown in Figure 2, the present invention puts the solder joint that built-up welding goes out does not have defectives such as undercut, pore.
Description of drawings
Fig. 1: flux-cored wire forming technology schematic diagram.
Fig. 2: solder joint design sketch after the some built-up welding.
The specific embodiment
All embodiment welding wires are all made " the passive drawing formula of FCWM50 flux-cored wire machine " by Kunming Heavy Machinery Factory and are made:
1. select the mild steel steel band of 10 * 0.3mm (width is 10mm, and thickness is 0.3mm) for use.Earlier it is rolled into U-shaped.Get high carbon ferro-chrome powder 40 grams, Ferromolybdenum Powder 8 grams, silicomangan powder 8 grams, ferrotianium powder 2 grams, al-mg alloy powder 5 grams, ferro-boron 2 grams, iron powder 35 grams.The various powder of get are put into mixed powder machine mixed 10 minutes, then mixed-powder is added in the mild steel steel band groove of U-shaped, filling rate is 30%.U-lag is healed up, makes medicinal powder parcel wherein, again through wire drawing die gradually tube reducing make its diameter reach 1.2mm.Carry out solid matter point built-up welding on the metallic matrix after cleaning scrubbing, i.e. adjacent last solder joint built-up welding next one solder joint when last solder joint cool to room temperature, welding current 180～220A, weldingvoltage 18～22V.Overlay cladding deposited metal hardness and relative wear resistance see Table 1.
2. select the mild steel steel band of 10 * 0.3mm (width is 10mm, and thickness is 0.3mm) for use.Earlier it is rolled into U-shaped.Get high carbon ferro-chrome powder 45 grams, Ferromolybdenum Powder 5 grams, silicomangan powder 15 grams, ferrotianium powder 2 grams, al-mg alloy powder 3 grams, ferro-boron 5 grams, iron powder 25 grams.The various powder of get are put into mixed powder machine mixed 10 minutes, then mixed-powder is added in the mild steel steel band groove of U-shaped, filling rate is 32%.U-lag is healed up, makes medicinal powder parcel wherein, again through wire drawing die gradually tube reducing make its diameter reach 1.2mm.Carry out solid matter point built-up welding on the metallic matrix after cleaning scrubbing, i.e. adjacent last solder joint built-up welding next one solder joint when last solder joint cool to room temperature, welding current 180 ~ 220A, weldingvoltage 18～22V.Overlay cladding deposited metal hardness and relative wear resistance see Table 1.
3. select the mild steel steel band of 10 * 0.3mm (width is 10mm, and thickness is 0.3mm) for use.Earlier it is rolled into U-shaped.Get high carbon ferro-chrome powder 50 grams, Ferromolybdenum Powder 15 grams, silicomangan powder 5 grams, ferrotianium powder 5 grams, al-mg alloy powder 2 grams, ferro-boron 5 grams, iron powder 18 grams.The various powder of get are put into mixed powder machine mixed 10 minutes, then mixed-powder is added in the mild steel steel band groove of U-shaped, filling rate is 34%.U-lag is healed up, makes medicinal powder parcel wherein, again through wire drawing die gradually tube reducing make its diameter reach 1.2mm.Carry out solid matter point built-up welding on the metallic matrix after cleaning scrubbing, i.e. adjacent last solder joint built-up welding next one solder joint when last solder joint cool to room temperature, welding current 180～220A, weldingvoltage 18～22V.Overlay cladding deposited metal hardness and relative wear resistance see Table 1.
4. select the mild steel steel band of 10 * 0.3mm (width is 10mm, and thickness is 0.3mm) for use.Earlier it is rolled into U-shaped.Get high carbon ferro-chrome powder 60 grams, Ferromolybdenum Powder 10 grams, silicomangan powder 8 grams, ferrotianium powder 3 grams, al-mg alloy powder 2 grams, ferro-boron 2 grams, iron powder 15 grams.The various powder of get are put into mixed powder machine mixed 10 minutes, then mixed-powder is added in the mild steel steel band groove of U-shaped, filling rate is 35%.U-lag is healed up, makes medicinal powder parcel wherein, again through wire drawing die gradually tube reducing make its diameter reach 1.2mm.Carry out solid matter point built-up welding on the metallic matrix after cleaning scrubbing, i.e. adjacent last solder joint built-up welding next one solder joint when last solder joint cool to room temperature, welding current 180～220A, weldingvoltage 18～22V.Overlay cladding deposited metal hardness and relative wear resistance see Table 1.
Hardness that table 1 is beaten all adopts the full Rockwell apparatus of TH320, diamond penetrator, and load is 150kg, overlay cladding is got at 10 beat hardness, obtains the average Rockwell hardness number of this overlay cladding at last.
Wear test adopts MLS-225 type wet type rubber wheel grain-abrasion testing machine to experimentize.
The overlay cladding of each embodiment is cut three 57 * 25 * 6mm wearing and tearing samples carry out wear test.The wear test parameter is as follows: the rubber wheel rotating speed: 240 rev/mins, rubber wheel diameter: 178mm, rubber wheel hardness: 60 (Shao Er hardness), load: 10Kg, rubber wheel revolution: pre-grinding 1000 is changeed, is formally ground and 2000 changes, abrasive material: 40～70 purpose quartz sands.The anti-wear performance of material is weighed with the weight loss of wearing and tearing.Forward and backward in experiment, test specimen is put into the beaker that fills acetone soln, in ultrasonic washing instrument, cleaned 3～5 minutes, during experiment with the Q235 steel as a comparison, contrast piece weight loss and measuring piece weight loss liken relative wear resistance to into this prescription.Anti-relatively
The hardness HRC and the relative wear resistance of each embodiment overlay cladding deposited metal of table 1
| The coating sequence number | Hardness (HRC) | Relative wear resistance (ε) |
| 1 | 51 | 16.7 |
| 2 | 51 | 15.1 |
| 3 | 53 | 18.8 |
| 4 | 50 | 15.8 |
Claims (1)
1. self-protecting dot and bead welding wire with metal core; it is characterized in that the described metal-cored following substances by mass percent that comprises: high carbon ferro-chrome 40%-60%, molybdenum-iron 5%-15%, silicomangan 5%-15%, ferrotianium 2%-5%, almag 2%-5%, ferro-boron 2%-5%, iron powder surplus.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100579931A CN100381245C (en) | 2006-03-03 | 2006-03-03 | Self-protecting dot and bead welding wire with metal core |
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| CNB2006100579931A CN100381245C (en) | 2006-03-03 | 2006-03-03 | Self-protecting dot and bead welding wire with metal core |
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| CN1810438A CN1810438A (en) | 2006-08-02 |
| CN100381245C true CN100381245C (en) | 2008-04-16 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427260C (en) * | 2006-10-20 | 2008-10-22 | 北京工业大学 | Self protection pile-up welding flux core welding wire for shield cutter edge |
| CN103753052B (en) * | 2014-01-23 | 2016-03-30 | 江苏科技大学 | A kind of low cost high rigidity self protection pile-up welding flux core welding wire |
| CN103862195B (en) * | 2014-03-26 | 2016-06-08 | 天津市永昌焊丝有限公司 | The preparation method of the gas-shielded overlaying flux cored soldering wire of a kind of high rigidity high cracking resistance |
| CN104858567B (en) * | 2015-03-31 | 2017-07-25 | 上海焊接器材有限公司 | A kind of metal core welding wire welded for automobile exhaust pipe |
| CN106112305B (en) * | 2016-07-28 | 2018-05-22 | 江苏科技大学 | A kind of inexpensive self-protection flux-cored wire containing different grain size deoxidier and preparation method thereof |
| CN106001995B (en) * | 2016-07-28 | 2018-07-31 | 江苏科技大学 | A kind of multicomponent nitride and boride collaboration enhancing self protection pile-up welding flux core welding wire |
| CN106001994B (en) * | 2016-07-28 | 2018-05-22 | 江苏科技大学 | A kind of flux-cored wire for enhancing the welding continuous self-shield effect of subregion and preparation method thereof |
| CN106956093A (en) * | 2017-03-31 | 2017-07-18 | 安徽再制造工程设计中心有限公司 | Coal-grinding roller built-up welding, flux cored wire used for submerged arc welding and its welding procedure |
| CN110919236A (en) * | 2019-12-11 | 2020-03-27 | 江苏科技大学 | Self-protection flux-cored wire for generating slag coating with special protection performance and preparation method |
| CN115464073B (en) * | 2022-10-09 | 2023-08-18 | 泰安众科建材有限公司 | Preparation of high-strength spring steel wire mesh by carbon spring steel wire and spot welding technology |
Citations (6)
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| US3976481A (en) * | 1972-12-12 | 1976-08-24 | Daniil Andreevich Dudko | Wear-resistant composite material |
| US4726854A (en) * | 1979-09-19 | 1988-02-23 | Research Corporation | Cast iron welding electrodes |
| CN1180602A (en) * | 1996-10-18 | 1998-05-06 | 宇永福 | Abrasion-resistant surfacing welding electrode for concrete transfer pump |
| JP2001198674A (en) * | 2000-01-11 | 2001-07-24 | Tohoku Electric Power Co Inc | Multilayered build-up carbon dioxide shielded arc welding method for ni-hard cast iron base metal |
| CN1478632A (en) * | 2003-08-08 | 2004-03-03 | 北京工业大学 | High hardness high abrasive self protecting pile up welding flux core welding wire |
| CN1621193A (en) * | 2004-12-23 | 2005-06-01 | 北京工业大学 | High-hardness, wearable, self-protecting metal cored surfacing welding wire |
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2006
- 2006-03-03 CN CNB2006100579931A patent/CN100381245C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3976481A (en) * | 1972-12-12 | 1976-08-24 | Daniil Andreevich Dudko | Wear-resistant composite material |
| US4726854A (en) * | 1979-09-19 | 1988-02-23 | Research Corporation | Cast iron welding electrodes |
| CN1180602A (en) * | 1996-10-18 | 1998-05-06 | 宇永福 | Abrasion-resistant surfacing welding electrode for concrete transfer pump |
| JP2001198674A (en) * | 2000-01-11 | 2001-07-24 | Tohoku Electric Power Co Inc | Multilayered build-up carbon dioxide shielded arc welding method for ni-hard cast iron base metal |
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Non-Patent Citations (1)
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| 高强度高耐磨自保护金属芯堆焊焊丝. 蒋旻，栗卓新，蒋建敏，史耀武.焊接学报，第27卷第1期. 2006 * |
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