CN105710499A - Build-up welding technique - Google Patents
Build-up welding technique Download PDFInfo
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- CN105710499A CN105710499A CN201410721512.7A CN201410721512A CN105710499A CN 105710499 A CN105710499 A CN 105710499A CN 201410721512 A CN201410721512 A CN 201410721512A CN 105710499 A CN105710499 A CN 105710499A
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Abstract
The invention discloses a build-up welding technique. The build-up welding technique comprises the following steps that (1) the interlayer temperature and the weld bead temperature need to be kept not lower than the preset temperature in the build-up welding process; (2) small-current short-arc build-up welding (the arc length is controlled to be about 4 mm) is adopted, the deposition rate of a welding rod is increased, and the current of a welding rod with the length being 4.0 mm is about 140 A; (3) multi-layer and multi-bead build-up welding is adopted, slag removal is strictly conducted on weld beads and between layers in the welding process, and the overlap amount of weld joints is controlled to be about half the width of the weld joints, namely half of the width of the first weld joint is covered with the second weld joint; (4) if build-up welding is conducted on two layers, the welding joint of the second layer needs to exceed or be shorter than the first welding joint by 20-25 mm; and (5) after build-up welding is completed by one circle, a build-up welded layer is checked, and a defective portion or a protruding portion or an arc pit is polished to be removed. According to the build-up welding technique, the procedures are reasonable, the manufacturing cost is low, all parameters are matched reasonably and coordinately, and the product quality and production efficiency can be effectively improved.
Description
Technical field
The present invention relates to a kind of bead-welding technology.
Background technology
Existing bead-welding technology exists that procedure arrangement is unreasonable, operation is various, and technological parameter selects unreasonable, and the collocation of each technological parameter is unreasonable and operator's skill requirement is higher so that production cost is higher, product quality is on the low side, yield rate is not high.
Summary of the invention
Because the drawbacks described above of prior art, the technical problem to be solved be to provide a kind of operation rationally, the bead-welding technology of low cost of manufacture.
For achieving the above object, the invention provides
A kind of bead-welding technology, comprises the steps:
1), prepare before weldering
Treat overlay cladding mother metal surface treatment: before built-up welding transition zone, all dirts such as surface rust should be removed clean, it is determined that surface treatment is clean；
2), welding rod drying
Transition zone A312(E309Mo) welding rod, stoving process 300 DEG C, 1 hour；
Cobalt base hard alloy EcoCr-A(STELLITE6) welding rod, stoving process 250 DEG C, 1 hour；
Welding rod exposes to the open air in atmosphere and is not more than 4 hours；
3), when preheating and built-up welding, temperature controls
Pre-heating mean: adopt crawler belt, adds heat-preservation cotton insulation；Crawler belt is evenly arranged in cone and fully wrapped around by heat-preservation cotton (two-layer)；Heat-preservation cotton on fortress in cone；Ensure homogeneous heating as far as possible；If running into power failure or the too low maximum temperature of temperature lower than 240 DEG C, heat-preservation cotton to be stoppered and be incubated, but once to have piled when continuing to be energized；
4), built-up welding
Adopt manual electric arc welding (SMAW) to carry out built-up welding, perform by following process:
1. weld deposit process to keep interlayer and welding bead temperature to be not less than preheating temperature；
2. adopt small area analysis short arc built-up welding (welding arc control about 4mm), increase welding rod deposition rate；4.0mm welding rod electric current is at about 140A；
3. adopting multilamellar multiple tracks built-up welding, strictly to carry out welding bead, interlayer scarfing cinder in welding process, weld seam lap rests in about 1/2 weld width, and namely second weld seam covers first weld width about 1/2；
If 4. built-up welding two-layer, the welding point of the second layer to exceed or to be shorter than ground floor welding point 20～25mm；
5. heap to carry out after being soldered a circle overlay cladding inspection defective or draw eminence or arc crater should carry out polishing and remove；
5), built-up welding main points
1. built-up welding adopts DC reverse connection；
2. during built-up welding, welding rod to keep plumbness in weldment surface as far as possible, except small end；
3. built-up welding arc manipulation wants fast and straight, and welding rod teeter width is less than 10～15mm, and welding bead thickness is less than 2.5mm；
Molten bath should be made to fill when 4. receiving arc full, namely somewhat stop when receiving arc and height is drawn at receipts arc place, then pull to horizontal side, then cease arc；Adopt point hit method to carry out striking, after striking, welding rod is improved, make ' preheating ' shape, recover short arc and teeter immediately, and by receiving the complete refuse of segmental arc deposited metal, to form new built-up welding molten bath；
5. for preventing crater crack during built-up welding, measure of keeping out the wind during welding, and forbid fan directly to blow workpiece, at least 3 welders will be adopted to carry out built-up welding in turn；Built-up welding wants one-time continuous to pile, and does not interrupt；
6. adopting longitudinal inclined weld method to carry out built-up welding, upper strata and lower floor's welding bead during built-up welding, the receipts acnode of built-up welding should stagger 20～25mm mutually；It is soldered every layer and to carry out polishing removal welding slag, splash and be polished flat too high joint；
6), heat treatment
6.1), to carry out the low temperature destressing heat treatment time of 550 DEG C fixed by basic unit's wall thickness for transition zone；
6.2), hard alloy layer to carry out the low temperature destressing heat treatment of 650 DEG C, firing rate is less than 80 DEG C/h, and rate of cooling is less than 100 DEG C/h；Power cutoff after being cooled to 200 DEG C, slow cooling is to room temperature.
The invention has the beneficial effects as follows: operation of the present invention is reasonable, low cost of manufacture, each parameter collocation reasonable coordination, it is possible to be effectively improved product quality and production efficiency.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
A kind of bead-welding technology, comprises the steps:
1), prepare before weldering
Treat overlay cladding mother metal surface treatment: before built-up welding transition zone, all dirts such as surface rust should be removed clean, it is determined that surface treatment is clean；
2), welding rod drying
Transition zone A312(E309Mo) welding rod, stoving process 300 DEG C, 1 hour；
Cobalt base hard alloy EcoCr-A(STELLITE6) welding rod, stoving process 250 DEG C, 1 hour；
Welding rod exposes to the open air in atmosphere and is not more than 4 hours；
3), when preheating and built-up welding, temperature controls
Pre-heating mean: adopt crawler belt, adds heat-preservation cotton insulation；Crawler belt is evenly arranged in cone and fully wrapped around by heat-preservation cotton (two-layer)；Heat-preservation cotton on fortress in cone；Ensure homogeneous heating as far as possible；If running into power failure or the too low maximum temperature of temperature lower than 240 DEG C, heat-preservation cotton to be stoppered and be incubated, but once to have piled when continuing to be energized；
4), built-up welding
Adopt manual electric arc welding (SMAW) to carry out built-up welding, perform by following process:
1. weld deposit process to keep interlayer and welding bead temperature to be not less than preheating temperature；
2. adopt small area analysis short arc built-up welding (welding arc control about 4mm), increase welding rod deposition rate；4.0mm welding rod electric current is at about 140A；
3. adopting multilamellar multiple tracks built-up welding, strictly to carry out welding bead, interlayer scarfing cinder in welding process, weld seam lap rests in about 1/2 weld width, and namely second weld seam covers first weld width about 1/2；
If 4. built-up welding two-layer, the welding point of the second layer to exceed or to be shorter than ground floor welding point 20～25mm；
5. heap to carry out after being soldered a circle overlay cladding inspection defective or draw eminence or arc crater should carry out polishing and remove；
5), built-up welding main points
1. built-up welding adopts DC reverse connection；
2. during built-up welding, welding rod to keep plumbness in weldment surface as far as possible, except small end；
3. built-up welding arc manipulation wants fast and straight, and welding rod teeter width is less than 10～15mm, and welding bead thickness is less than 2.5mm；
Molten bath should be made to fill when 4. receiving arc full, namely somewhat stop when receiving arc and height is drawn at receipts arc place, then pull to horizontal side, then cease arc；Adopt point hit method to carry out striking, after striking, welding rod is improved, make ' preheating ' shape, recover short arc and teeter immediately, and by receiving the complete refuse of segmental arc deposited metal, to form new built-up welding molten bath；
5. for preventing crater crack during built-up welding, measure of keeping out the wind during welding, and forbid fan directly to blow workpiece, at least 3 welders will be adopted to carry out built-up welding in turn；Built-up welding wants one-time continuous to pile, and does not interrupt；
6. adopting longitudinal inclined weld method to carry out built-up welding, upper strata and lower floor's welding bead during built-up welding, the receipts acnode of built-up welding should stagger 20～25mm mutually；It is soldered every layer and to carry out polishing removal welding slag, splash and be polished flat too high joint；
6), heat treatment
6.1), to carry out the low temperature destressing heat treatment time of 550 DEG C fixed by basic unit's wall thickness for transition zone；
6.2), hard alloy layer to carry out the low temperature destressing heat treatment of 650 DEG C, firing rate is less than 80 DEG C/h, and rate of cooling is less than 100 DEG C/h；Power cutoff after being cooled to 200 DEG C, slow cooling is to room temperature.
Claims (1)
1. a bead-welding technology, is characterized in that: comprise the steps:
1), prepare before weldering
Treat overlay cladding mother metal surface treatment: before built-up welding transition zone, all dirts such as surface rust should be removed clean, it is determined that surface treatment is clean；
2), welding rod drying
Transition zone A312(E309Mo) welding rod, stoving process 300 DEG C, 1 hour；
Cobalt base hard alloy EcoCr-A(STELLITE6) welding rod, stoving process 250 DEG C, 1 hour；
Welding rod exposes to the open air in atmosphere and is not more than 4 hours；
3), when preheating and built-up welding, temperature controls
Pre-heating mean: adopt crawler belt, adds heat-preservation cotton insulation；Crawler belt is evenly arranged in cone and fully wrapped around by heat-preservation cotton (two-layer)；Heat-preservation cotton on fortress in cone；Ensure homogeneous heating as far as possible；If running into power failure or the too low maximum temperature of temperature lower than 240 DEG C, heat-preservation cotton to be stoppered and be incubated, but once to have piled when continuing to be energized；
4), built-up welding
Adopt manual electric arc welding (SMAW) to carry out built-up welding, perform by following process:
1. weld deposit process to keep interlayer and welding bead temperature to be not less than preheating temperature；
2. adopt small area analysis short arc built-up welding (welding arc control about 4mm), increase welding rod deposition rate；4.0mm welding rod electric current is at about 140A；
3. adopting multilamellar multiple tracks built-up welding, strictly to carry out welding bead, interlayer scarfing cinder in welding process, weld seam lap rests in about 1/2 weld width, and namely second weld seam covers first weld width about 1/2；
If 4. built-up welding two-layer, the welding point of the second layer to exceed or to be shorter than ground floor welding point 20～25mm；
5. heap to carry out after being soldered a circle overlay cladding inspection defective or draw eminence or arc crater should carry out polishing and remove；
5), built-up welding main points
1. built-up welding adopts DC reverse connection；
2. during built-up welding, welding rod to keep plumbness in weldment surface as far as possible, except small end；
3. built-up welding arc manipulation wants fast and straight, and welding rod teeter width is less than 10～15mm, and welding bead thickness is less than 2.5mm；
Molten bath should be made to fill when 4. receiving arc full, namely somewhat stop when receiving arc and height is drawn at receipts arc place, then pull to horizontal side, then cease arc；Adopt point hit method to carry out striking, after striking, welding rod is improved, make ' preheating ' shape, recover short arc and teeter immediately, and by receiving the complete refuse of segmental arc deposited metal, to form new built-up welding molten bath；
5. for preventing crater crack during built-up welding, measure of keeping out the wind during welding, and forbid fan directly to blow workpiece, at least 3 welders will be adopted to carry out built-up welding in turn；Built-up welding wants one-time continuous to pile, and does not interrupt；
6. adopting longitudinal inclined weld method to carry out built-up welding, upper strata and lower floor's welding bead during built-up welding, the receipts acnode of built-up welding should stagger 20～25mm mutually；It is soldered every layer and to carry out polishing removal welding slag, splash and be polished flat too high joint；
6), heat treatment
6.1), to carry out the low temperature destressing heat treatment time of 550 DEG C fixed by basic unit's wall thickness for transition zone；
6.2), hard alloy layer to carry out the low temperature destressing heat treatment of 650 DEG C, firing rate is less than 80 DEG C/h, and rate of cooling is less than 100 DEG C/h；Power cutoff after being cooled to 200 DEG C, slow cooling is to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410721512.7A CN105710499A (en) | 2014-12-03 | 2014-12-03 | Build-up welding technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410721512.7A CN105710499A (en) | 2014-12-03 | 2014-12-03 | Build-up welding technique |
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| CN105710499A true CN105710499A (en) | 2016-06-29 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108127230A (en) * | 2017-12-04 | 2018-06-08 | 鲁西工业装备有限公司 | A kind of band pole submerged arc overlay welding method of N10276 alloys |
| CN108856976A (en) * | 2018-08-20 | 2018-11-23 | 哈尔滨哈锅锅炉容器工程有限责任公司 | Hardfacing technique |
| CN108994419A (en) * | 2018-08-20 | 2018-12-14 | 江苏科技大学 | A kind of pecker composite overlaying manufacturing method |
| CN109570715A (en) * | 2018-12-21 | 2019-04-05 | 耿立朋 | A kind of welding procedure in internal mixer mixing chamber welding hard crackle alloy |
| CN109623099A (en) * | 2018-12-26 | 2019-04-16 | 江苏新宏大集团有限公司 | Helical blade wearing layer alloy welding deposit technique |
| CN110253206A (en) * | 2019-06-14 | 2019-09-20 | 中广核工程有限公司 | The main screw hole damage rehabilitation method of nuclear power plant's reactor pressure vessel |
| CN111570978A (en) * | 2020-04-01 | 2020-08-25 | 中车青岛四方机车车辆股份有限公司 | Threaded hole thin-wall repair welding method |
| CN111958144A (en) * | 2020-07-29 | 2020-11-20 | 南通河海大学海洋与近海工程研究院 | Overlaying material for remanufacturing erosion-resistant amphibious dredging machine bucket and using method |
| CN112296482A (en) * | 2020-11-11 | 2021-02-02 | 中车洛阳机车有限公司 | Welding method for rice rail framework lap joint |
| CN114589380A (en) * | 2020-12-07 | 2022-06-07 | 上海赛科利汽车模具技术应用有限公司 | Automobile mould surfacing method |
| CN114799424A (en) * | 2022-05-10 | 2022-07-29 | 南京迪威尔高端制造股份有限公司 | Welding method for inner hole of cylindrical part of underwater Christmas tree |
-
2014
- 2014-12-03 CN CN201410721512.7A patent/CN105710499A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108127230A (en) * | 2017-12-04 | 2018-06-08 | 鲁西工业装备有限公司 | A kind of band pole submerged arc overlay welding method of N10276 alloys |
| CN108856976A (en) * | 2018-08-20 | 2018-11-23 | 哈尔滨哈锅锅炉容器工程有限责任公司 | Hardfacing technique |
| CN108994419A (en) * | 2018-08-20 | 2018-12-14 | 江苏科技大学 | A kind of pecker composite overlaying manufacturing method |
| CN109570715A (en) * | 2018-12-21 | 2019-04-05 | 耿立朋 | A kind of welding procedure in internal mixer mixing chamber welding hard crackle alloy |
| CN109623099B (en) * | 2018-12-26 | 2020-12-25 | 江苏新宏大集团有限公司 | Gold surfacing process for abrasion-resistant layer of helical blade |
| CN109623099A (en) * | 2018-12-26 | 2019-04-16 | 江苏新宏大集团有限公司 | Helical blade wearing layer alloy welding deposit technique |
| CN110253206A (en) * | 2019-06-14 | 2019-09-20 | 中广核工程有限公司 | The main screw hole damage rehabilitation method of nuclear power plant's reactor pressure vessel |
| CN110253206B (en) * | 2019-06-14 | 2022-03-15 | 中广核工程有限公司 | Main screw hole damage repairing method for nuclear power plant reactor pressure vessel |
| CN111570978A (en) * | 2020-04-01 | 2020-08-25 | 中车青岛四方机车车辆股份有限公司 | Threaded hole thin-wall repair welding method |
| CN111570978B (en) * | 2020-04-01 | 2021-10-01 | 中车青岛四方机车车辆股份有限公司 | Threaded hole thin-wall repair welding method |
| CN111958144A (en) * | 2020-07-29 | 2020-11-20 | 南通河海大学海洋与近海工程研究院 | Overlaying material for remanufacturing erosion-resistant amphibious dredging machine bucket and using method |
| CN112296482A (en) * | 2020-11-11 | 2021-02-02 | 中车洛阳机车有限公司 | Welding method for rice rail framework lap joint |
| CN114589380A (en) * | 2020-12-07 | 2022-06-07 | 上海赛科利汽车模具技术应用有限公司 | Automobile mould surfacing method |
| CN114799424A (en) * | 2022-05-10 | 2022-07-29 | 南京迪威尔高端制造股份有限公司 | Welding method for inner hole of cylindrical part of underwater Christmas tree |
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Application publication date: 20160629 |