CN102489891A - Special welding electrode for surfacing and repairing broken teeth of light-load and low-speed gear - Google Patents
Special welding electrode for surfacing and repairing broken teeth of light-load and low-speed gear Download PDFInfo
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- CN102489891A CN102489891A CN2011103633604A CN201110363360A CN102489891A CN 102489891 A CN102489891 A CN 102489891A CN 2011103633604 A CN2011103633604 A CN 2011103633604A CN 201110363360 A CN201110363360 A CN 201110363360A CN 102489891 A CN102489891 A CN 102489891A
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Abstract
Disclosed is a special welding electrode for surfacing and repairing broken teeth of a light-load and low-speed gear. Chemical components of the coating of the special welding electrode in weight percent (wt %) include 50-55% of marble, 4-6% of chalk, 25-30% of fluorite, 1-3% of quartz, 1-3% of medium carbon ferrochromium, 1-3% of ferrotitanium, 1-3% of high carbon ferromanganese, 1-3% of ferrosilicon, 1-3% of lanthanum trioxide and 1-3% of metallic nickel, and a core wire is an H08A steel welding wire. The welding electrode is capable of surfacing and repairing the light-load and low-speed forged steel gear without preweld preheating or post-weld heat treatment, deposited metal has high cracking resistance, and the welding electrode is extremely convenient to use on site. The surface hardness of the repaired light-load and low-speed gear ranges from HBS (Brinell hardness scale) 200 to HBS 280, and the service life of the repaired gear is three times that of an original gear.
Description
Technical field
The present invention relates to a kind of welding rod, particularly build up electrode.
Background technology
Gear is one of most widely used part in the machine driving, in products such as automobile, tractor, lathe, hoisting machinery, important effect is arranged not only, and consumption is quite big.Gear mainly contains forged steel, cast steel, cast iron and non-ferrous metal by material category.Wherein, forged steel is used the most extensive, and the gear of important use all adopts the forged steel manufacturing usually.Selecting for use of concrete gear material mainly is that size, the height of rotating speed and the required precision of gear of load confirmed during according to working gear.Generally be divided into underload, middle load and top load by the gear bearing load; Generally be divided into low-speed gear (1 ~ 9 m/s), intermediate gear (6 ~ 10 m/s) and high gear (10 ~ 15 m/s) by gear rotational speed; Be generally 6 ~ 8 grades (in, low speed) and 8 ~ 12 grades (at a high speed) by the accuracy of gear, automobile, tractor gear precision are generally 6 ~ 8 grades.
Gear-driven failure mode and influence factor are more, and wherein gear tooth fracture (broken teeth) is comparatively common gear destruction form, also is the major reason that causes gear failure.Broken teeth is the principal mode of underloading, low speed forged steel gear destruction, and particularly broken teeth is generally accident, is not having under the situation of equipment gear, and broken teeth can seriously influence normal production, brings enormous economic loss to enterprise.
In recent years; Underloading, the low speed forged steel gear of broken teeth attempted to repair through the mode of built-up welding by domestic and international many enterprises, but owing to underloading, low speed forged steel gear are that its carbon equivalent is higher by mild steel or medium carbon steel manufacturing; Particularly do not have under the condition of weld preheating and post weld heat treatment at the scene; Crackle on gear surface, very easily occurs, reduce gear postwelding quality even repairing failure, thereby limited the extensive use of underloading, low speed forged steel gear tooth breakage technology for repairing surfacing.
Patent " build-up welding electrode for composite double-metal big gear re-manufacturing technology " (patent No. ZL200510007159.7), be primarily aimed at size diameter at the large gear of 3-5 rice because of surface abrasion, recover its surface size through built-up welding, rather than the broken teeth reparation; A kind of " special welding electrode for surfacing and repairing broken teeth of cast iron gear " and a kind of " special welding electrode for surfacing and repairing broken teeth of cast steel gear " is primarily aimed at cast iron and the reparation of cast steel gear broken teeth, rather than underloading, low speed forged steel gear.
Summary of the invention
The object of the present invention is to provide a kind of easy welding, postwelding cracking resistance, life-span length and cheap underloading, low-speed gear special welding electrode for surfacing and repairing broken teeth.
Extraordinary surfacing welding of the present invention, the percentage by weight of its chemical composition of coating are (wt%): marble 50-55, chalk 4-6, fluorite 25-30; Quartzy 1-3, medium carbon ferrochrome 1-3, ferrotianium 1-3, high carbon ferromanganese 1-3; Ferrosilicon 1-3, lanthanum sesquioxide 1-3, metallic nickel 1-3.Core wire is a H08A steel welding wire.
Ferrotianium, high carbon ferromanganese and ferrosilicon in the above-mentioned coating raw material can combined deoxidation, purifies the built-up welding molten bath; Medium carbon ferrochrome can be controlled certain carbon content and chromium content, improves the quenching degree of deposited metal, and forms a spot of chromium carbide that contains, and guarantees the wearability of suitable deposited metal; Alloying element manganese can guarantee that deposited metal has higher intensity and anti-fatigue performance; Lanthanum sesquioxide also can deoxidation, desulfurization, purifies the built-up welding molten bath, can also refinement postwelding primary solidification structure and secondary solidification structure, and rotten field trash improves the toughness of deposited metal, improves the anti-cracking performance of deposited metal; Metal nickel powder can improve the built-up welding tissue, improves stress distribution, improves the anti-cracking performance of deposited metal.
The preparation method of welding rod of the present invention:
1, part material is carried out Passivation Treatment:
A, with silicon iron powder heating, 720-750 ℃ of insulation 1 hour,
B, with medium carbon ferrochrome powder heating, 550-600 ℃ of insulation 1 hour,
C, with high carbon ferromanganese powder heating, 300-350 ℃ of insulation 1 hour.
2, mix: the various raw materials of above-mentioned coating are put into batch mixer fully mix, and then add sodium silicate binder and stir, the modulus of this waterglass is 2.7-3.0, and Baume degrees is 48-50.
3, compacting: be squeezed on the H08A steel welding wire with the material of welding rod coating machine with above-mentioned mixing.
4, drying: welding rod is carried out drying at 100-200 ℃.
The present invention has following advantage:
1, underloading, the low speed forged steel gear through built-up welding can replace the gear through production after grinding or cut, not only reduced manufacturing process, saved the raw material and the energy, and be 3 times of original gear while in its service life.
2, this welding rod is repaired broken teeth, before need not welding gear is carried out preheating, and postwelding is without heat treatment, and is on-the-spot easy to use, is easy to welding, and postwelding does not ftracture, and welding quality obviously improves, and hardness range is HBS 200 ~ 280.
3, this special welding rod not only can be applied to serial reduction box; And can be applied to metallurgical machinery, in carry ubiquitous underloading, low-speed gear broken teeth built-up welding reparations such as machinery, machine industry; Have the important engineering meaning, its market space is very wide.
The specific embodiment
Embodiment 1:
The get it filled raw material of skin, 55 kilograms in marble, 30 kilograms in fluorite, quartzy 3 kilograms, 6 kilograms of chalks, 1 kilogram of medium carbon ferrochrome, 1 kilogram of high carbon ferromanganese, 1 kilogram of ferrosilicon, 1 kilogram of ferrotianium, 1 kilogram of lanthanum sesquioxide, 1 kilogram of metallic nickel and H08A steel welding wire.Earlier ferrosilicon, medium carbon ferrochrome and high carbon ferromanganese are carried out Passivation Treatment, be about to the silicon iron powder heating, 720 ℃ of insulations 1 hour; With the heating of medium carbon ferrochrome powder, 550 ℃ of insulations 1 hour; With the heating of high carbon ferromanganese powder, 300 ℃ of insulations 1 hour.The various raw materials of above-mentioned coating are put into batch mixer fully mix, and then add sodium silicate binder and stir, the modulus of this waterglass is 2.7, and Baume degrees is 48.Be squeezed on the H08A steel welding wire with the material of welding rod coating machine above-mentioned mixing.At 100 ℃ core wire is carried out drying.Adopt above-mentioned welding rod built-up welding to repair underloading, low-speed gear, exempt from preheating before the weldering, postwelding is exempted from heat treatment, the hardness of repairing the surface, back is HBS 200.
Embodiment 2:
The get it filled raw material of skin, 53 kilograms in marble, 28 kilograms in fluorite, quartzy 2 kilograms, 5 kilograms of chalks, 2 kilograms of medium carbon ferrochromes, 2 kilograms of high carbon ferromanganeses, 2 kilograms of ferrosilicon, 2 kilograms of ferrotianiums, 2 kilograms of lanthanum sesquioxides, 2 kilograms of metallic nickels and H08A steel welding wire.Earlier ferrosilicon, medium carbon ferrochrome and high carbon ferromanganese are carried out Passivation Treatment, be about to the silicon iron powder heating, 730 ℃ of insulations 1 hour; With the heating of medium carbon ferrochrome powder, 570 ℃ of insulations 1 hour; With the heating of high carbon ferromanganese powder, 330 ℃ of insulations 1 hour.The various raw materials of above-mentioned coating are put into batch mixer fully mix, and then add sodium silicate binder and stir, the modulus of this waterglass is 2.8, and Baume degrees is 49.Be squeezed on the H08A steel welding wire with the material of welding rod coating machine above-mentioned mixing.At 150 ℃ core wire is carried out drying.Adopt above-mentioned welding rod built-up welding to repair underloading, low-speed gear, exempt from preheating before the weldering, postwelding is exempted from heat treatment, the hardness of repairing the surface, back is HBS 240.
Embodiment 3:
The get it filled raw material of skin, 50 kilograms in marble, 25 kilograms in fluorite, quartzy 1 kilogram, 6 kilograms of chalks, 3 kilograms of medium carbon ferrochromes, 3 kilograms of high carbon ferromanganeses, 3 kilograms of ferrosilicon, 3 kilograms of ferrotianiums, 3 kilograms of lanthanum sesquioxides, 3 kilograms of metallic nickels and H08A steel welding wire.Earlier ferrosilicon, medium carbon ferrochrome and high carbon ferromanganese are carried out Passivation Treatment, be about to the silicon iron powder heating, 750 ℃ of insulations 1 hour; With the heating of medium carbon ferrochrome powder, 600 ℃ of insulations 1 hour; With the heating of high carbon ferromanganese powder, 350 ℃ of insulations 1 hour.The various raw materials of above-mentioned coating are put into batch mixer fully mix, and then add sodium silicate binder and stir, the modulus of this waterglass is 3.0, and Baume degrees is 50.Be squeezed on the H08A steel welding wire with the material of welding rod coating machine above-mentioned mixing.At 200 ℃ core wire is carried out drying.Adopt above-mentioned welding rod built-up welding to repair underloading, low-speed gear, exempt from preheating before the weldering, postwelding is exempted from heat treatment, the hardness of repairing the surface, back is HBS 280.
Claims (1)
1. special welding rod is used in a underloading, low speed forged steel gear tooth breakage built-up welding reparation, and it is characterized in that: the percentage by weight of its chemical composition of coating is wt%: marble 50-55, chalk 4-6; Fluorite 25-30, quartzy 1-3, medium carbon ferrochrome 1-3; Ferrotianium 1-3, high carbon ferromanganese 1-3, ferrosilicon 1-3; Lanthanum sesquioxide 1-3, metallic nickel 1-3; Its core wire is a H08A steel welding wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103633604A CN102489891A (en) | 2011-11-16 | 2011-11-16 | Special welding electrode for surfacing and repairing broken teeth of light-load and low-speed gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103633604A CN102489891A (en) | 2011-11-16 | 2011-11-16 | Special welding electrode for surfacing and repairing broken teeth of light-load and low-speed gear |
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| Publication Number | Publication Date |
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| CN102489891A true CN102489891A (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103633604A Pending CN102489891A (en) | 2011-11-16 | 2011-11-16 | Special welding electrode for surfacing and repairing broken teeth of light-load and low-speed gear |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110860819A (en) * | 2019-12-28 | 2020-03-06 | 哈尔滨威尔焊接有限责任公司 | Ultralow-hydrogen welding rod for welding 12Cr2Mo1R steel hydrogenation device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3890137A (en) * | 1973-03-15 | 1975-06-17 | Goetzewerke | Welding powder for producing wear-resistant layers by build-up welding |
| CN1418755A (en) * | 2002-12-23 | 2003-05-21 | 顿子江 | Pile-up welding for repairing toothed wheel and shaft of oil-pumping machine |
| WO2007140748A1 (en) * | 2006-06-08 | 2007-12-13 | Mtu Aero Engines Gmbh | Method of producing or repairing turbine or engine components, and a component, namely a turbine or engine component |
| CN101920404A (en) * | 2010-07-23 | 2010-12-22 | 燕山大学 | Special welding electrode for surfacing and repairing broken teeth of cast iron gear |
| CN101920414A (en) * | 2010-07-23 | 2010-12-22 | 燕山大学 | Special welding electrode for surfacing and repairing broken teeth of cast steel gear |
-
2011
- 2011-11-16 CN CN2011103633604A patent/CN102489891A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3890137A (en) * | 1973-03-15 | 1975-06-17 | Goetzewerke | Welding powder for producing wear-resistant layers by build-up welding |
| CN1418755A (en) * | 2002-12-23 | 2003-05-21 | 顿子江 | Pile-up welding for repairing toothed wheel and shaft of oil-pumping machine |
| WO2007140748A1 (en) * | 2006-06-08 | 2007-12-13 | Mtu Aero Engines Gmbh | Method of producing or repairing turbine or engine components, and a component, namely a turbine or engine component |
| CN101920404A (en) * | 2010-07-23 | 2010-12-22 | 燕山大学 | Special welding electrode for surfacing and repairing broken teeth of cast iron gear |
| CN101920414A (en) * | 2010-07-23 | 2010-12-22 | 燕山大学 | Special welding electrode for surfacing and repairing broken teeth of cast steel gear |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110860819A (en) * | 2019-12-28 | 2020-03-06 | 哈尔滨威尔焊接有限责任公司 | Ultralow-hydrogen welding rod for welding 12Cr2Mo1R steel hydrogenation device |
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Application publication date: 20120613 |