CN109623099A - Helical blade wearing layer alloy welding deposit technique - Google Patents
Helical blade wearing layer alloy welding deposit technique Download PDFInfo
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- CN109623099A CN109623099A CN201811603396.3A CN201811603396A CN109623099A CN 109623099 A CN109623099 A CN 109623099A CN 201811603396 A CN201811603396 A CN 201811603396A CN 109623099 A CN109623099 A CN 109623099A
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- welding
- helical blade
- wearing layer
- road
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3033—Ni as the principal constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/044—Built-up welding on three-dimensional surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention provides a kind of helical blade wearing layer alloy welding deposit technique.Remove the rust dirt impurity of helical blade end face and neighbouring welding section；With ERNiCrMo-3 Ni-Cr-Mo welding wire along the helical blade end face argon arc-welding built-up welding transition zone, arrow path is used when welding, short arc, is not swung, welding current is 80 to 85 peaces, temperature is not higher than 130 degrees Celsius between road, the built-up welding number of plies is one layer of twice, using sequential welding, the welding direction of twice is on the contrary, and trace overlap amount reaches the half of preceding road weld seam afterwards；Weldment natural cooling；The helical blade is preheated to 200 to 250 degrees Celsius；Built-up welding Si Taili cobalt-base alloys cladding, welding current is 75 to 80 peaces when built-up welding, and temperature is not less than 200 degrees Celsius between road, the welding direction between welding bead be back and forth it is round-trip, welded by road, be staggered at the welding point between per pass weld seam road.The service life of blade can greatly be extended through the invention.
Description
Technical field
The present invention relates to helical blade welding technology field, in particular to a kind of helical blade wearing layer alloy welding deposit work
Skill.
Background technique
Remoter from transmission shaft on blade, stress is bigger, and the edge abrasion amount of blade is also bigger.It is used in machinery part surface
The method heap of welding applies the process of one or more layers same material or different metals, referred to as built-up welding.
In the prior art, the method that helical blade material uses pure carbon steel or stainless steel to make additional Cr30 moving vane,
Its wear-resisting property is general, and service life is short and processing is many and diverse.
Summary of the invention
In view of the above technical problems, relatively simple the purpose of the present invention is to provide a kind of technique and blade can be extended use the longevity
The helical blade wearing layer alloy welding deposit technique of life.
Helical blade wearing layer alloy welding deposit technique of the invention includes: step 1, remove helical blade end face and near
The rust dirt impurity of welding section；Step 2, with ERNiCrMo-3 Ni-Cr-Mo welding wire along the helical blade end face argon arc-welding built-up welding mistake
Cross layer, when welding using arrow path, short arc, do not swing, welding current is 80 to 85 peaces, and weldingvoltage is 12 to 16 volts, welding speed
Degree is 8 to 12 centimetres per minute, and temperature is not higher than 130 degrees Celsius between road, and the built-up welding number of plies is one layer of twice, using sequential welding, after
The welding direction in the road Dao Yuqian on the contrary, and lap reach the half of preceding road weld seam；Step 3, weldment natural cooling；Step 4,
The helical blade is preheated to 200 to 250 degrees Celsius；Step 5, built-up welding Si Taili cobalt-base alloys cladding, welding current when built-up welding
For 75 to 80 peaces, weldingvoltage is 16 to 18 volts, and speed of welding is 10 to 12 centimetres per minute, and temperature is taken the photograph not less than 200 between road
Family name's degree, the welding direction between welding bead be back and forth it is round-trip, welded by road, be staggered at the welding point between per pass weld seam road.
Preferably, the ERNiCrMo-3 Ni-Cr-Mo gage of wire used is 2 millimeters, and protective gas is argon in step 2
Gas, 10 millimeters of gas nozzle, gas flow is 10 to 12 liters per minute.
Preferably, carrying out argon arc-welding built-up welding, gage of wire 3.2 using No. 12 welding wires of Si Taili cobalt-based in step 5
Millimeter, protective gas are argon gas, and 10 millimeters of gas nozzle, gas flow is 10 to 12 liters per minute.
Preferably, further including in step 3, butt-welding fitting carries out dyeing inspection, gives repair welding when defect occurs in flaw detection and repairs
Mill.
Preferably, wrapping up the helical blade in step 4 using heating tape and being preheated.
Preferably, arc crater fills up when receiving arc in step 5, reflow arc inciting process is used at welding point.
Preferably, further including checking fillet in parallel shear after step 5, there is interior recess to use argon arc repair welding.
Preferably, further including, if face of weld is rough smooth, removing defect at defective place, and make after step 5
It polishes flat after being filled up with argon arc welding.
Preferably, further including using the entire helical blade of rock wool tight immediately after welding after step 5, delay
Slow cool down is to room temperature.
Further, after step 5 further include: make 100% infiltration to welded component weld surface and monitor；And/or with
Surfacing hardness is detected on the vertical plane of deposited metal surface.
Compared with prior art, helical blade wearing layer alloy welding deposit technique of the invention is in helical blade (such as two-phase
2205 material of steel) on built-up welding cobalt-based antifriction alloy (as taken charge of too vertical 12), helical blade can be made with higher wear-resisting and corrosion-resistant
Comprehensive performance, higher deposited metal hardness is (as up to 42 to 47 HRC).For extend blade service life, in helical blade
As required with axis assembling, spot welding, welding after, bead-welding technology of the invention can be used in blade edge；Using above-mentioned
Alloy welding deposit technique reduces the production and processing of Cr30 moving vane, while can greatly extend the service life of blade.
Detailed description of the invention
Fig. 1 is the flow chart of the helical blade wearing layer alloy welding deposit technique of one embodiment of the invention.
Fig. 2 is the built-up welding section structural schematic diagram of one embodiment of the invention.
Specific embodiment
To make to have further understanding to the purpose of the present invention, construction, feature and its function, hereby cooperate embodiment detailed
It is described as follows.
Incorporated by reference to referring to Fig. 1 and Fig. 2, Fig. 1 is the helical blade wearing layer alloy welding deposit technique of one embodiment of the invention
Flow chart, Fig. 2 are the built-up welding section structural schematic diagram of one embodiment of the invention.Helical blade wearing layer alloy welding deposit of the invention
Technique includes the following steps.
S1 removes the rust dirt impurity of 10 end face of helical blade and neighbouring welding section, such as oil, rust, moisture content impurity.Helical-blade
2205 material of dual phase steel can be used in piece main body.
S2, with ERNiCrMo-3 Ni-Cr-Mo welding wire along the helical blade end face argon arc-welding built-up welding transition zone 12, when welding
It using arrow path, short arc, does not swing, welding current is 80 to 85 peaces, and weldingvoltage is 12 to 16 volts, and speed of welding is per minute 8
To 12 centimetres, temperature is not higher than 130 DEG C between road, and the built-up welding number of plies is one layer of twice, using sequential welding, twice the (the in such as Fig. 2 the 1st
The welding direction 2) of road, the on the contrary, and rear road (the in such as Fig. 2 the 2nd) lap reach preceding road (the in such as Fig. 2 the 1st)
The half of weld seam.Preferably, in step s 2, the ERNiCrMo-3 Ni-Cr-Mo gage of wire used is 2 millimeters, and protective gas is
Argon gas, 10 millimeters of gas nozzle, gas flow is 10 to 12 liters per minute.
Using said welding method parameter, the scaling loss of alloying element can be reduced, dilution rate is reduced, avoids austenite column
The segregation of coarse grains and impurity.Using sequential welding, the tendency that crackle is increased because of local heating, cooling is reduced.
S3, weldment natural cooling.The step forbids water cooling, in order to avoid generate cold crack.
Preferably, in step s3 further include that butt-welding fitting carries out dyeing inspection, give repair welding when defect occurs in flaw detection and repair
Mill.In principle, it should ensure that the built-up welding for carrying out subsequent Si Taili (such as Stellite 12) welding wire after zero defect again.
The helical blade is preheated to 200 to 250 degrees Celsius by S4.Preferably, using heating tape wrap up the helical blade into
Row preheating.
S5, built-up welding Si Taili cobalt-base alloys cladding 14, welding current is 75 to 80 peaces when built-up welding, and weldingvoltage is 16 to 18
Volt, speed of welding are 10 to 12 centimetres per minute, and temperature is not less than 200 DEG C between road, the welding direction between welding bead be back and forth it is round-trip,
It welds by road, is staggered at the welding point between per pass (the in such as Fig. 2 the 3rd, the 4th and the 5th) weld seam road.In an embodiment
In, step S5 carries out argon arc-welding built-up welding using No. 12 welding wires of Si Taili cobalt-based, and gage of wire is 3.2 millimeters, and protective gas is argon
Gas, 10 millimeters of gas nozzle, gas flow is 10 to 12 liters per minute.Preferably, strict control welding current must not when built-up welding
It is excessive, dilution rate is reduced to greatest extent；Welding direction between welding bead should be welded by road back and forth back and forth, with reduce welding stress and
Deformation.
Preferably, in step s 5, arc crater fills up when receiving arc, to prevent crater crack；It is used back at welding point
Arc inciting process is welded, to guarantee the welding quality at welding point.
In one embodiment, further include checking fillet in parallel shear after step 5, thering is interior recess to use argon arc repair welding.
It preferably, further include, if face of weld is rough smooth, removing defect at defective place, and make after step S5
It polishes flat after being filled up with argon arc welding.Face of weld is answered smooth, and no slag inclusion, splashing, knot carbon, undercut the defects of rosin joint, have
Fault location is removed defect and polished flat after being filled up by previous process using argon arc welding.
Preferably, further include using the entire helical blade of rock wool tight immediately after welding after step S5, delay
Slow cool down is to room temperature.
Preferably, after step S5 further include: make 100% infiltration to welded component weld surface and monitor.Such as whether see it
Meet the professional standards such as NB47013.
Preferably, after step S5 further include: with detect surfacing hardness on the vertical plane of deposited metal surface.Such as it sees
Its HRC hardness meets 43~48 related request.
Helical blade wearing layer alloy welding deposit technique of the invention is the heap in helical blade (such as 2205 material of dual phase steel)
Welding cobalt-based antifriction alloy, (such as too vertical 12) of department, can make the with higher wear-resisting and corrosion-resistant comprehensive performance of helical blade, higher
Deposited metal hardness is (as up to 42 to 47 HRC).
For extend blade service life, helical blade as required with axis assembling, spot welding, welding after, can be in leaf
Piece edge uses bead-welding technology of the invention；Reduce the production of Cr30 moving vane using above-mentioned alloy welding deposit technique to add
Work, while can greatly extend the service life of blade.
The present invention is described by above-mentioned related embodiment, however above-described embodiment is only to implement example of the invention.
It must be noted that the embodiment disclosed is not limiting as the scope of the present invention.On the contrary, do not depart from spirit of the invention and
It is changed and retouched made by range, belongs to scope of patent protection of the invention.
Claims (10)
1. a kind of helical blade wearing layer alloy welding deposit technique, characterized by comprising:
Step 1 removes the rust dirt impurity of helical blade end face and neighbouring welding section；
Step 2, with ERNiCrMo-3 Ni-Cr-Mo welding wire along the helical blade end face argon arc-welding built-up welding transition zone, when welding, is adopted
With arrow path, short arc, do not swing, welding current be 80 to 85 peace, weldingvoltage be 12 to 16 volts, speed of welding be per minute 8 to
12 centimetres, temperature is not higher than 130 degrees Celsius between road, and the built-up welding number of plies is one layer of twice, using sequential welding, the welding of Hou Dao and preceding road
It is contrary, and lap reaches the half of preceding road weld seam；
Step 3, weldment natural cooling；
The helical blade is preheated to 200 to 250 degrees Celsius by step 4；
Step 5, built-up welding Si Taili cobalt-base alloys cladding, welding current is 75 to 80 peaces when built-up welding, and weldingvoltage is 16 to 18
Volt, speed of welding are 10 to 12 centimetres per minute, and temperature is not less than 200 degrees Celsius between road, and the welding direction between welding bead is back and forth
Back and forth, it welds by road, is staggered at the welding point between per pass weld seam road.
2. helical blade wearing layer alloy welding deposit technique as described in claim 1, which is characterized in that in step 2, use
ERNiCrMo-3 Ni-Cr-Mo gage of wire be 2 millimeters, protective gas is argon gas, and 10 millimeters of gas nozzle, gas flow is every
10 to 12 liters of minute.
3. helical blade wearing layer alloy welding deposit technique as claimed in claim 1 or 2, which is characterized in that in step 5, adopt
Argon arc-welding built-up welding is carried out with No. 12 welding wires of Si Taili cobalt-based, gage of wire is 3.2 millimeters, and protective gas is argon gas, gas nozzle
10 millimeters, gas flow is 10 to 12 liters per minute.
4. helical blade wearing layer alloy welding deposit technique as described in claim 1, which is characterized in that also wrapped in step 3
It includes, butt-welding fitting carries out dyeing inspection, gives repair welding reconditioning when defect occurs in flaw detection.
5. helical blade wearing layer alloy welding deposit technique as described in claim 1, which is characterized in that in step 4, utilize
It wraps up the helical blade and is preheated in heating tape.
6. helical blade wearing layer alloy welding deposit technique as described in claim 1, which is characterized in that in step 5, receive arc
When arc crater fill up, at welding point use reflow arc inciting process.
7. helical blade wearing layer alloy welding deposit technique as described in claim 1, which is characterized in that also wrapped after step 5
It includes, checks fillet in parallel shear, thering is interior recess to use argon arc repair welding.
8. helical blade wearing layer alloy welding deposit technique as described in claim 1, which is characterized in that also wrapped after step 5
It includes, if face of weld is rough smooth, removes defect at defective place, and polish flat after filling up using argon arc welding.
9. helical blade wearing layer alloy welding deposit technique as described in claim 1, which is characterized in that also wrapped after step 5
It includes, uses the entire helical blade of rock wool tight immediately after welding, be slowly cooled to room temperature.
10. helical blade wearing layer alloy welding deposit technique as claimed in claim 9, which is characterized in that also wrapped after step 5
It includes: 100% infiltration being made to welded component weld surface and is monitored；And/or with detect overlay cladding on the vertical plane of deposited metal surface
Hardness.
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| CN201811603396.3A CN109623099B (en) | 2018-12-26 | 2018-12-26 | Gold surfacing process for abrasion-resistant layer of helical blade |
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| CN201811603396.3A CN109623099B (en) | 2018-12-26 | 2018-12-26 | Gold surfacing process for abrasion-resistant layer of helical blade |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110773839A (en) * | 2019-11-13 | 2020-02-11 | 安徽应流集团霍山铸造有限公司 | Welding process method for preventing repair welding cracks of nickel-based alloy bent pipe |
| CN111261399A (en) * | 2020-03-30 | 2020-06-09 | 南京安盛电子有限公司 | Method for stacking and welding silicon steel sheets of transformer |
| CN111318864A (en) * | 2020-03-04 | 2020-06-23 | 南宁弗纳姆智能科技有限公司 | Sugarcane cutter processing technology |
| CN112276307A (en) * | 2020-10-20 | 2021-01-29 | 江苏利柏特股份有限公司 | Stellite alloy welding and heat treatment process for modular production |
| CN113523719A (en) * | 2021-07-10 | 2021-10-22 | 上海泽超实业有限公司 | Machining process of helical blade |
| CN113909656A (en) * | 2021-12-10 | 2022-01-11 | 东方法马通核泵有限责任公司 | Surfacing process and surfacing method for main pump shaft seal matching part |
| CN114226908A (en) * | 2021-12-14 | 2022-03-25 | 东方电气集团东方汽轮机有限公司 | Welding method for dissimilar stellite trace alloy elements |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101433990A (en) * | 2008-11-19 | 2009-05-20 | 南京宝色股份公司 | Overlaying welding method of large area carbide alloy of workpiece wear layer |
| CN105710499A (en) * | 2014-12-03 | 2016-06-29 | 重庆远煌机械制造有限公司 | Build-up welding technique |
| CN105710500A (en) * | 2014-12-04 | 2016-06-29 | 重庆聆益机械有限公司 | Process for overlaying flange sealing surface with stainless steel flux-cored wire |
| CN105750693A (en) * | 2016-04-29 | 2016-07-13 | 山西阳煤化工机械（集团）有限公司 | Wear-resistant material surfacing method achieving preheating temperature lowering |
-
2018
- 2018-12-26 CN CN201811603396.3A patent/CN109623099B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101433990A (en) * | 2008-11-19 | 2009-05-20 | 南京宝色股份公司 | Overlaying welding method of large area carbide alloy of workpiece wear layer |
| CN105710499A (en) * | 2014-12-03 | 2016-06-29 | 重庆远煌机械制造有限公司 | Build-up welding technique |
| CN105710500A (en) * | 2014-12-04 | 2016-06-29 | 重庆聆益机械有限公司 | Process for overlaying flange sealing surface with stainless steel flux-cored wire |
| CN105750693A (en) * | 2016-04-29 | 2016-07-13 | 山西阳煤化工机械（集团）有限公司 | Wear-resistant material surfacing method achieving preheating temperature lowering |
Non-Patent Citations (3)
| Title |
|---|
| 张亚滨: "不锈钢钴基耐磨堆焊焊接工艺", 《科技信息》 * |
| 王纯祥等: "大型螺旋送料转轴的整体焊接工艺", 《焊接》 * |
| 马鸣等: "钴基耐磨硬质合金焊条电弧焊堆焊国产化试验研究", 《电焊机》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110773839A (en) * | 2019-11-13 | 2020-02-11 | 安徽应流集团霍山铸造有限公司 | Welding process method for preventing repair welding cracks of nickel-based alloy bent pipe |
| CN111318864A (en) * | 2020-03-04 | 2020-06-23 | 南宁弗纳姆智能科技有限公司 | Sugarcane cutter processing technology |
| CN111261399A (en) * | 2020-03-30 | 2020-06-09 | 南京安盛电子有限公司 | Method for stacking and welding silicon steel sheets of transformer |
| WO2021196676A1 (en) * | 2020-03-30 | 2021-10-07 | 南京安盛电子有限公司 | Transformer silicon steel sheet stacking and welding method |
| CN112276307A (en) * | 2020-10-20 | 2021-01-29 | 江苏利柏特股份有限公司 | Stellite alloy welding and heat treatment process for modular production |
| CN112276307B (en) * | 2020-10-20 | 2021-11-05 | 江苏利柏特股份有限公司 | Stellite alloy welding and heat treatment process for modular production |
| CN113523719A (en) * | 2021-07-10 | 2021-10-22 | 上海泽超实业有限公司 | Machining process of helical blade |
| CN113909656A (en) * | 2021-12-10 | 2022-01-11 | 东方法马通核泵有限责任公司 | Surfacing process and surfacing method for main pump shaft seal matching part |
| CN114226908A (en) * | 2021-12-14 | 2022-03-25 | 东方电气集团东方汽轮机有限公司 | Welding method for dissimilar stellite trace alloy elements |
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