CN110656231A - Protection device for welding seam of welded gear - Google Patents
Protection device for welding seam of welded gear Download PDFInfo
- Publication number
- CN110656231A CN110656231A CN201911000655.8A CN201911000655A CN110656231A CN 110656231 A CN110656231 A CN 110656231A CN 201911000655 A CN201911000655 A CN 201911000655A CN 110656231 A CN110656231 A CN 110656231A
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- China
- Prior art keywords
- gear
- protection device
- welded
- spoke
- welding
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- 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.)
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
- C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/04—Treatment of selected surface areas, e.g. using masks
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a welding seam protection device for quenching a welded gear, which is used for protecting the welding seam at the spoke of the welded gear and comprises the following components: a carbon impermeable coating coated at the weld of the spoke; an aluminum silicate fiber cotton layer laid on the upper surface of the anti-carburizing coating; the asbestos plate is paved on the upper surface of the aluminum silicate fiber cotton layer; and the cover plate is paved on the upper surface of the asbestos plate and is welded with the inner wall of the wheel rim of the welded gear and the outer circle of the wheel hub. During quenching, the hardenability of the spoke and the welding line is reduced due to the action of the protection device, so that the spoke has better plasticity, and the possibility of generating cracks in the welding line is reduced. In addition, the protection measures enable the air quantity brought by the protection device during quenching to be small, solve the problem of combustion of quenching oil and eliminate potential safety hazards.
Description
Technical Field
The invention relates to the technical field of welded gears, in particular to a protection device for a welding seam of a welded gear.
Background
The welded gear has the advantages of low material cost, light weight and the like, is a necessary trend of gear development, and at present, the technology has been introduced and researched by a plurality of manufacturing industries and achieves better effect, so that the welded gear is applied to the manufacturing industry of large gears.
In the production process of welded gears, the heat treatment of welded gears is a complex comprehensive technique, which relates to the quality of the weld. The gear structure and the whole material cannot cause different dimensional changes, different tissue transformation and the like, and a lot of difficulties are brought to the protection of the welding part.
At present, the wheel rim, the wheel hub and the wheel spoke of the welding gear are usually made of different materials, so that the welding seam of the welding gear is easy to crack due to different thermal stress and tissue stress in the heating and cooling processes.
In addition, residual oil and welding residues of the internal welding seam of the welded gear are not easy to clean, the anti-seepage coating is not well combined with the matrix, the welding seam is easy to leak and carburize, and the risk of quenching cracks is increased.
Therefore, how to provide a protection device for a welding seam during gear quenching welding to reduce the possibility of spoke cracking is an urgent technical problem to be solved in the field.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a protector for a weld bead during quenching of a welded gear, which reduces the possibility of cracking of a spoke.
In order to achieve the purpose, the invention provides the following technical scheme:
a protection device for a weld seam when a welded gear is quenched, which is used for protecting the weld seam at a spoke of the welded gear, comprises:
a carbon impermeable coating coated at the weld of the spoke;
an aluminum silicate fiber cotton layer laid on the upper surface of the anti-carburizing coating;
the asbestos plate is paved on the upper surface of the aluminum silicate fiber cotton layer;
and the cover plate is paved on the upper surface of the asbestos plate and is welded with the inner wall of the wheel rim of the welded gear and the outer circle of the wheel hub.
Preferably, in the above protection device for a weld, the cover plate is a Q235 steel plate.
Preferably, in the above protection device for a weld, the surface of the welded gear is coated with at least two anti-carburizing coatings.
Preferably, in the above-described protector for a weld, the welded gear is cleaned from residual oil by a heating furnace and from residual oil by a cleaning machine before quenching.
Preferably, in the above device for protecting a weld, the heating furnace is heated to 200 ℃ to dry the welded gear for 3 hours, and the welded gear is placed in the heating furnace to be dried once after being taken out of the furnace and air-cooled.
Preferably, in the above-described device for protecting a weld, the temperature of the welded gear is raised in stages when the welded gear is heated, and the temperature of the welded gear is lowered in stages when the welded gear is cooled.
Preferably, in the above-described weld bead protection device, the temperature rise rate of the welding gear during heating is 40 ℃/h.
Preferably, in the above-described weld bead protection device, the welded gear is cooled after carburization at a temperature reduction rate of 40 ℃/h in a carburizing furnace to 600 ℃, and then discharged from the furnace and cooled in air.
According to the technical scheme, the welding line protection device for the quenching of the welded gear, disclosed by the invention, has the advantages that the aluminum silicate fiber cotton layer and the asbestos plate play a heat insulation role in the spoke and the welding line, and the cover plate plays a shaping and heat insulation role in the aluminum silicate fiber cotton layer and the asbestos plate, so that a heat source in the spoke mainly depends on the heat conduction of the rim and the hub, and the heating temperature of the spoke and the welding line is slowed down and reduced. During quenching, the hardenability of the spoke and the welding line is reduced due to the action of the protection device, so that the spoke has better plasticity, and the possibility of generating cracks in the welding line is reduced. In addition, the protection measures enable the air quantity brought by the protection device during quenching to be small, solve the problem of combustion of quenching oil and eliminate potential safety hazards.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural view of a weld bead protection device in quenching of a welded gear according to an embodiment of the present invention.
Detailed Description
In view of the above, the core of the present invention is to disclose a protection device for a weld joint during gear quenching, which reduces the possibility of cracks in a spoke.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the invention discloses a protection device for a weld seam during gear quenching welding, which is used for protecting the weld seam at a spoke of a welded gear 1, and comprises the following components: the anti-carburizing coating is coated at the welding seam of the spoke; an alumina silicate fiber cotton layer 4 laid on the upper surface of the anti-carburizing coating; the asbestos plate 3 is paved on the upper surface of the alumina silicate fiber cotton layer 4; and the cover plate 2 is laid on the upper surface of the asbestos plate 3, and the cover plate 2 is welded with the inner wall of the wheel rim of the welding gear 1 and the outer circle of the wheel hub. Specifically, the alumina silicate fiber cotton layer 4 is about 20mm thick and 100mm wide, and different sizes can be set according to different requirements in practice and are all within a protection range. The anti-carburizing coating is bonded with the aluminum silicate fiber cotton layer 4, and the cover plate 2 is spot-welded with the inner wall of the wheel rim and the outer circle of the wheel hub to form a whole.
In the above-mentioned setting, aluminium silicate fiber cotton layer 4 and asbestos board 3 play adiabatic effect to spoke and welding seam, apron 2 plays 4 and the thermal-insulated effect of stereotype and the asbestos board 3 of aluminium silicate fiber cotton layer, makes the inside heat source of spoke mainly rely on the heat-conduction of rim and wheel hub, slows down and has reduced the heating temperature of spoke and welding seam. During quenching, the hardenability of the spoke and the welding line is reduced due to the action of the protection device, so that the spoke has better plasticity, and the possibility of generating cracks in the welding line is reduced. In addition, the protection measures enable the air quantity brought by the protection device during quenching to be small, solve the problem of combustion of quenching oil and eliminate potential safety hazards.
In a specific embodiment, the cover plate 2 is a Q235 steel plate, and specifically, is formed by gas cutting the Q235 steel plate. The material of the cover plate 2 can be selected according to different requirements, and the heat insulation effect can be achieved within a protection range.
The surface of the welding gear 1 in the application is coated with at least two layers of anti-carburizing coatings so as to improve the combination effect of the anti-carburizing coatings and the base body.
The residual oil and the residue are on the surface of the welding gear 1 because the residual oil of the welding gear 1 is not easy to clean. The welded gear 1 in the present application is cleaned of residual oil by a heating furnace and of residues by a cleaning machine before quenching. Baking at 200 deg.C for 3 hr in a heating furnace, drying the oil, taking out of the furnace, air cooling, and cleaning again. The residues of the welded gear 1 can be cleaned by water washing. The mode is firstly used for cleaning the residual oil and then used for washing, so that the problem that the residual oil and the welding residues at the welding seam are difficult to clean is solved, and the key effect on the paint protection of the welding seam is achieved.
In order to reduce the tendency of cracking, the welding gear 1 in the application is heated in a temperature-segmented manner when being heated, and is cooled in a temperature-segmented manner when being cooled. Specifically, the temperature of each part of the gear ring in each temperature section basically reaches thermal balance through the heat preservation of each temperature section, the temperature difference is reduced, the temperature rise speed is controlled to be about 40 ℃/h through the heat preservation of each temperature section, namely the temperature rise in each hour is small, the problem caused by rapid temperature rise is avoided, the thermal stress and the structure transformation stress generated in the heating process are reduced, and the welding seam cracking tendency is reduced. And the other function can eliminate welding and machining stress.
After carburization, the workpiece is cooled to 600 ℃ (below phase change temperature) along with the furnace and then is discharged from the furnace for air cooling, so that the phenomenon that the temperature difference of the part is too large and large thermal stress is generated due to too high cooling speed is avoided. And the temperature reduction speed in the carburizing furnace is 40 ℃/h.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A protection device for a weld joint when a welded gear is quenched is used for protecting the weld joint at a spoke of the welded gear, and is characterized by comprising:
a carbon impermeable coating coated at the weld of the spoke;
an aluminum silicate fiber cotton layer laid on the upper surface of the anti-carburizing coating;
the asbestos plate is paved on the upper surface of the aluminum silicate fiber cotton layer;
and the cover plate is paved on the upper surface of the asbestos plate and is welded with the inner wall of the wheel rim of the welded gear and the outer circle of the wheel hub.
2. The weld joint protection device according to claim 1, wherein the cover plate is a Q235 steel plate.
3. The weld bead protection device according to claim 1, wherein the surface of said welded gear is coated with at least two anti-carburizing coatings.
4. The weld bead protection apparatus according to claim 1, wherein the welded gear is cleaned of residual oil by a heating furnace and cleaned of residues by a cleaning machine before quenching.
5. The weld joint protection device according to claim 4, wherein the heating furnace is heated to 200 ℃ to dry the welding gear for 3 hours, and the welding gear is placed into the heating furnace to be dried once after being taken out of the furnace and cooled in air.
6. The weld joint protection device according to claim 1, wherein the welding gear is heated in a temperature-segmented manner when heated, and is cooled in a temperature-segmented manner when cooled.
7. The weld bead protection device according to claim 6, wherein the welding gear is heated at a temperature rise rate of 40 ℃/h.
8. The weld joint protector according to claim 6, wherein the welded gear is cooled after carburization at a temperature reduction rate of 40 ℃/h in a carburizing furnace to 600 ℃, and then discharged from the furnace for air cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911000655.8A CN110656231A (en) | 2019-10-21 | 2019-10-21 | Protection device for welding seam of welded gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911000655.8A CN110656231A (en) | 2019-10-21 | 2019-10-21 | Protection device for welding seam of welded gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110656231A true CN110656231A (en) | 2020-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911000655.8A Pending CN110656231A (en) | 2019-10-21 | 2019-10-21 | Protection device for welding seam of welded gear |
Country Status (1)
| Country | Link |
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| CN (1) | CN110656231A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61293677A (en) * | 1985-06-24 | 1986-12-24 | Ishii Tekkosho:Kk | Method for stopping molten metal in automatic vertical welding |
| CN103736648A (en) * | 2013-12-31 | 2014-04-23 | 南车戚墅堰机车车辆工艺研究所有限公司 | Gear anti-carburizing treatment method |
| CN104212966A (en) * | 2013-05-31 | 2014-12-17 | 中国石油天然气集团公司 | Anti-sulfur acid-resistant long conveying pipeline heat treatment process |
| CN106319191A (en) * | 2016-10-21 | 2017-01-11 | 中国化学工程第六建设有限公司 | Postweld stabilizing thermal treatment method for pipeline made of TP347 material |
-
2019
- 2019-10-21 CN CN201911000655.8A patent/CN110656231A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61293677A (en) * | 1985-06-24 | 1986-12-24 | Ishii Tekkosho:Kk | Method for stopping molten metal in automatic vertical welding |
| CN104212966A (en) * | 2013-05-31 | 2014-12-17 | 中国石油天然气集团公司 | Anti-sulfur acid-resistant long conveying pipeline heat treatment process |
| CN103736648A (en) * | 2013-12-31 | 2014-04-23 | 南车戚墅堰机车车辆工艺研究所有限公司 | Gear anti-carburizing treatment method |
| CN106319191A (en) * | 2016-10-21 | 2017-01-11 | 中国化学工程第六建设有限公司 | Postweld stabilizing thermal treatment method for pipeline made of TP347 material |
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Application publication date: 20200107 |
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