CN102785002B - Aluminum bronze build-up welding technology on surface of rolling mill screw-down screw - Google Patents
Aluminum bronze build-up welding technology on surface of rolling mill screw-down screw Download PDFInfo
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- CN102785002B CN102785002B CN201210251628.XA CN201210251628A CN102785002B CN 102785002 B CN102785002 B CN 102785002B CN 201210251628 A CN201210251628 A CN 201210251628A CN 102785002 B CN102785002 B CN 102785002B
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Abstract
The invention discloses an aluminum bronze build-up welding technology on the surface of a rolling mill screw-down screw. The technology comprises the following steps: carrying out penetrant flaw detection and confirmation on a build-up welding area on the surface of the screw-down screw; hanging the screw-down screw into an electric furnace for integral heating till the screw-down screw is 280 to 320 DEG C, and insulating for 7 to 9 hours; hanging the screw-down screw in a build-up welding tooling while binding the non-welding part well with heat insulation cotton; carrying out build-up welding by adopting a symmetric welding or cross welding method, wherein the build-up welding processing parameters are as follows: welding current 180 to 300A, arc voltage 28 to 32 V, welding speed 50 to 55 cm/min, wire extension 15 to 18 mm, and gas flow rate 15 to 20 L/min; carrying out slag removal and interlayer temperature measuring as long as a first layer is welded; carrying out stress relieving as long as the build-up welding process is completed; and carrying out penetrant flaw detection. According to the invention, the technology has the advantages that the quality of a welding seam is high; and the generation of defects such as hot crack, air holes and slag inclusion can be controlled effectively.
Description
Technical field
The present invention relates to bead-welding technology field, particularly relate to a kind of rolling mill screwdown screw surface aluminium bronze bead-welding technology.
Background technology
Built-up welding is process fast as the one economy of material surface modifying, during the manufacture being applied to each industrial department part is more and more widely repaired.In order to play the effect of overlay cladding most effectively, wish that the overlaying method adopted has the dilution of less mother metal, higher deposition rate and excellent overlay properties, i.e. the technique for overlaying of high-quality, efficient, low dilution rate.
Screwdown gear is because its roll gap adjustment speed is fast and bearing capacity large and be widely used in heavy and medium plate mill, strip-mill strip, blooming mill and shape rolling mill, and one of base apparatus becoming milling train.Its safe and reliable operation, is related to the stable operating rate of cut deal goods thickness of slab precision and whole milling train.In screwdown gear, depress spiro rod is an important spare part, higher to the physics of depress spiro rod, mechanical property requirements, require that depress spiro rod has enough intensity, good anti-wear performance and heat resistance, the method generally taked carries out built-up welding construction on depress spiro rod surface, and existing built-up welding construction exists following defect: the stress because producing in impurity in weld seam and alloying element and welding process in aluminium bronze weld deposit process can produce fire check; It is fast especially that weld seam crystallization process of setting carries out, and hydrogen is not easily separated out, and hydrogen continues to bubble diffusion, and makes weld seam form pore, affects welding quality, thus affects the performance of depress spiro rod.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of rolling mill screwdown screw surface aluminium bronze bead-welding technology, and can solve the defect existed in prior art, weldquality is high, effectively can control the defects such as fire check, pore, slag inclusion and produce.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of rolling mill screwdown screw surface aluminium bronze bead-welding technology, comprise the following steps:
A, penetrant inspection inspection confirmation is carried out to depress spiro rod surface overlaying region;
B, the depress spiro rod confirmed hung in electric furnace carry out entirety and be heated to 280 ~ 320 DEG C through defect detecting test, be incubated 7 ~ 9 hours;
C, to be hung by depress spiro rod in heap mounted welder, non-solder position heat-preservation cotton bandages;
D, adopt be symmetrically welded or cross weld method to heap mounted welder on depress spiro rod carry out built-up welding, bead-welding technology parameter is: welding current 180 ~ 300A, arc voltage 28 ~ 32V, speed of welding 50 ~ 55cm/min, electrode extension 15 ~ 18mm, gas flow 15 ~ 20L/min, welding ground floor;
The welding of e, ground floor completely carries out scarfing cinder immediately, to polish immediately face of weld layer with abrasive machine;
Face of weld layer temperature measured by f, use temperature measuring device, and key-course temperature is 175 ± 25 DEG C;
G, repetition steps d ~ f, complete multiple-bead deposit;
Immediately depress spiro rod is sent in electric furnace after h, built-up welding terminate and carry out the process that eliminates stress;
I, carry out penetrant inspection inspection to the face of weld of depress spiro rod, confirm welding defect, built-up welding completes.
In a preferred embodiment of the present invention, welding adopts gas shielded arc welding, and welding wire adopts aluminium bronze welding wire.
In a preferred embodiment of the present invention, the specification of described welding wire is
.
In a preferred embodiment of the present invention, welding the protective gas adopted is argon gas.
In a preferred embodiment of the present invention, described in the treatment temperature that eliminates stress be 510 DEG C.
In a preferred embodiment of the present invention, every layer of monolateral built-up welding thickness of overlay cladding is 1.5 ± 0.5mm, and overlay surface high low peak is less than 1mm.
In a preferred embodiment of the present invention, the material of described depress spiro rod is 42CrMo.
The invention has the beneficial effects as follows: rolling mill screwdown screw surface aluminium bronze bead-welding technology of the present invention; take effective technological parameter; reasonable welding procedure; the protected effect of inert gas is best; electric arc heat is more concentrated; protected effect is better, and weldquality is high, effectively can control the defects such as fire check, pore, slag inclusion and produce.
Detailed description of the invention
Below preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
The embodiment of the present invention comprises:
Embodiment 1:
A kind of rolling mill screwdown screw surface aluminium bronze bead-welding technology, comprises the following steps:
A, carry out penetrant inspection inspection confirmation to depress spiro rod surface overlaying region, the material of depress spiro rod is 42CrMo;
B, the depress spiro rod confirmed hung in electric furnace carry out entirety and be heated to 280 DEG C through defect detecting test, be incubated 7 hours;
C, to be hung by depress spiro rod in heap mounted welder, non-solder position heat-preservation cotton bandages, and will take draught exclusion device simultaneously, forbids welding in blower fan and having during draught;
D, adopt be symmetrically welded or cross weld method to heap mounted welder on depress spiro rod carry out built-up welding; bead-welding technology parameter is: welding current 180A, arc voltage 28V, speed of welding 50cm/min, electrode extension 15mm, gas flow 15L/min; welding ground floor; welding adopts gas shielded arc welding; welding wire adopts Si meter Ke wlding Co., Ltd special gas protection welding wire ERCuAl-Al, and the specification of welding wire is
, welding the protective gas adopted is argon gas;
Workpiece deformation trend is observed at any time, according to workpiece deformation adjusting process and technological parameter at any time in weld deposit process;
Find in weld deposit process that defect stops welding immediately, construct again after waiting reason to be analyzed;
The welding of e, ground floor completely carries out scarfing cinder immediately, to polish immediately face of weld layer with abrasive machine;
Face of weld layer temperature measured by f, use temperature measuring device, and key-course temperature is 175 ± 5 DEG C;
G, repetition steps d ~ f, complete multiple-bead deposit, every layer of monolateral built-up welding thickness of overlay cladding is 1mm, and overlay surface high low peak is less than 1mm;
Sent in electric furnace by depress spiro rod immediately after h, built-up welding terminate and carry out the process that eliminates stress, in-furnace temperature is temperature is 510 DEG C;
I, carry out penetrant inspection inspection to the face of weld of depress spiro rod, confirm welding defect, built-up welding completes.
Embodiment 2:
A kind of rolling mill screwdown screw surface aluminium bronze bead-welding technology, comprises the following steps:
A, carry out penetrant inspection inspection confirmation to depress spiro rod surface overlaying region, the material of depress spiro rod is 42CrMo;
B, the depress spiro rod confirmed hung in electric furnace carry out entirety and be heated to 300 DEG C through defect detecting test, be incubated 8 hours;
C, to be hung by depress spiro rod in heap mounted welder, non-solder position heat-preservation cotton bandages, and will take draught exclusion device simultaneously, forbids welding in blower fan and having during draught;
D, adopt be symmetrically welded or cross weld method to heap mounted welder on depress spiro rod carry out built-up welding; bead-welding technology parameter is: welding current 230A, arc voltage 30V, speed of welding 52cm/min, electrode extension 17mm, gas flow 18L/min; welding ground floor; welding adopts gas shielded arc welding; welding wire adopts Si meter Ke wlding Co., Ltd special gas protection welding wire ERCuAl-Al, and the specification of welding wire is
, welding the protective gas adopted is argon gas;
Workpiece deformation trend is observed at any time, according to workpiece deformation adjusting process and technological parameter at any time in weld deposit process;
Find in weld deposit process that defect stops welding immediately, construct again after waiting reason to be analyzed;
The welding of e, ground floor completely carries out scarfing cinder immediately, to polish immediately face of weld layer with abrasive machine;
Face of weld layer temperature measured by f, use temperature measuring device, and key-course temperature is 175 ± 10 DEG C;
G, repetition steps d ~ f, complete multiple-bead deposit, every layer of monolateral built-up welding thickness of overlay cladding is 1.5mm, and overlay surface high low peak is less than 1mm;
Sent in electric furnace by depress spiro rod immediately after h, built-up welding terminate and carry out the process that eliminates stress, in-furnace temperature is temperature is 510 DEG C;
I, carry out penetrant inspection inspection to the face of weld of depress spiro rod, confirm welding defect, built-up welding completes.
Embodiment 3:
A kind of rolling mill screwdown screw surface aluminium bronze bead-welding technology, comprises the following steps:
A, carry out penetrant inspection inspection confirmation to depress spiro rod surface overlaying region, the material of depress spiro rod is 42CrMo;
B, the depress spiro rod confirmed hung in electric furnace carry out entirety and be heated to 320 DEG C through defect detecting test, be incubated 9 hours;
C, to be hung by depress spiro rod in heap mounted welder, non-solder position heat-preservation cotton bandages, and will take draught exclusion device simultaneously, forbids welding in blower fan and having during draught;
D, adopt be symmetrically welded or cross weld method to heap mounted welder on depress spiro rod carry out built-up welding, bead-welding technology parameter is: welding current 300A, arc voltage 32V, speed of welding 55cm/min, electrode extension 18mm, gas flow 20L/min; Welding ground floor, welding adopts gas shielded arc welding, and welding wire adopts Si meter Ke wlding Co., Ltd special gas protection welding wire ERCuAl-Al, and the specification of welding wire is
, welding the protective gas adopted is argon gas;
Workpiece deformation trend is observed at any time, according to workpiece deformation adjusting process and technological parameter at any time in weld deposit process;
Find in weld deposit process that defect stops welding immediately, construct again after waiting reason to be analyzed;
The welding of e, ground floor completely carries out scarfing cinder immediately, to polish immediately face of weld layer with abrasive machine;
Face of weld layer temperature measured by f, use temperature measuring device, and key-course temperature is 175 ± 25 DEG C;
G, repetition steps d ~ f, complete multiple-bead deposit, every layer of monolateral built-up welding thickness of overlay cladding is 2mm, and overlay surface high low peak is less than 1mm;
Sent in electric furnace by depress spiro rod immediately after h, built-up welding terminate and carry out the process that eliminates stress, in-furnace temperature is temperature is 510 DEG C;
I, carry out penetrant inspection inspection to the face of weld of depress spiro rod, confirm welding defect, built-up welding completes.
Rolling mill screwdown screw surface aluminium bronze bead-welding technology of the present invention, takes effective technological parameter, reasonable welding procedure; the protected effect of inert gas is best, and electric arc heat is more concentrated, and protected effect is better; weldquality is high, effectively can control the defects such as fire check, pore, slag inclusion and produce.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (6)
1. a rolling mill screwdown screw surface aluminium bronze bead-welding technology, is characterized in that, comprise the following steps:
A, penetrant inspection inspection confirmation is carried out to depress spiro rod surface overlaying region;
B, the depress spiro rod confirmed hung in electric furnace carry out entirety and be heated to 280 ~ 320 DEG C through defect detecting test, be incubated 7 ~ 9 hours;
C, to be hung by depress spiro rod in heap mounted welder, heap mounted welder is placed in no-wind environment, and non-solder position heat-preservation cotton bandages;
D, adopt be symmetrically welded or cross weld method to heap mounted welder on depress spiro rod carry out built-up welding, bead-welding technology parameter is: welding current 180 ~ 300A, arc voltage 28 ~ 32V, speed of welding 50 ~ 55cm/min, electrode extension 15 ~ 18mm, gas flow 15 ~ 20L/min, welding ground floor;
The welding of e, ground floor completely carries out scarfing cinder immediately, to polish immediately face of weld layer with abrasive machine;
Face of weld layer temperature measured by f, use temperature measuring device, and key-course temperature is 175 ± 25 DEG C;
G, repetition steps d ~ f, complete multiple-bead deposit, every layer of monolateral built-up welding thickness of overlay cladding is 1.5 ± 0.5mm, and overlay surface high low peak is less than 1mm;
Immediately depress spiro rod is sent in electric furnace after h, built-up welding terminate and carry out the process that eliminates stress;
I, carry out penetrant inspection inspection to the face of weld of depress spiro rod, confirm welding defect, built-up welding completes.
2. rolling mill screwdown screw surface aluminium bronze bead-welding technology according to claim 1, is characterized in that, welding adopts gas shielded arc welding, and welding wire adopts aluminium bronze welding wire.
3. rolling mill screwdown screw surface aluminium bronze bead-welding technology according to claim 2, is characterized in that, the specification of described welding wire is F1.2mm.
4. rolling mill screwdown screw surface aluminium bronze bead-welding technology according to claim 2, is characterized in that, welding the protective gas adopted is argon gas.
5. rolling mill screwdown screw surface aluminium bronze bead-welding technology according to claim 1, is characterized in that, described in the treatment temperature that eliminates stress be 510 DEG C.
6. rolling mill screwdown screw surface aluminium bronze bead-welding technology according to claim 1, is characterized in that, the material of described depress spiro rod is 42CrMo.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210251628.XA CN102785002B (en) | 2012-07-20 | 2012-07-20 | Aluminum bronze build-up welding technology on surface of rolling mill screw-down screw |
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|---|---|---|---|
| CN201210251628.XA CN102785002B (en) | 2012-07-20 | 2012-07-20 | Aluminum bronze build-up welding technology on surface of rolling mill screw-down screw |
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| CN102785002A CN102785002A (en) | 2012-11-21 |
| CN102785002B true CN102785002B (en) | 2015-03-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103990889B (en) * | 2013-02-18 | 2016-09-07 | 沈阳透平机械股份有限公司 | The welding procedure of build-up wear-resistant layers of copper in a kind of crosshead pin-and-hole |
| CN109128436A (en) * | 2018-10-15 | 2019-01-04 | 武汉船用机械有限责任公司 | A kind of process of the built-up welding aluminium bronze on steel |
| CN115041775B (en) * | 2022-07-14 | 2023-07-04 | 一重集团(黑龙江)重工有限公司 | Copper overlaying method for screw-down screw |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0076324A1 (en) * | 1981-04-08 | 1983-04-13 | Kawasaki Steel Corporation | A process for controlling welding when using a stripelectrode |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011121113A (en) * | 2009-12-14 | 2011-06-23 | Welding Alloys Japan:Kk | Build-up welding method for screw blade |
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- 2012-07-20 CN CN201210251628.XA patent/CN102785002B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0076324A1 (en) * | 1981-04-08 | 1983-04-13 | Kawasaki Steel Corporation | A process for controlling welding when using a stripelectrode |
Non-Patent Citations (6)
| Title |
|---|
| 42CrMo堆铜缺陷的分析与预防;张晓辉等;《一重技术》;20100228(第1期);第44-46页 * |
| 42CrMo空心主轴的堆焊;杨德松;《焊接技术》;19931031(第5期);第44-45页 * |
| 付志鸿.轴上铝青铜的堆焊.《机械工人(热加工)》.2002,(第3期),第20-21页. * |
| 铝青铜的氩弧堆焊;马岩等;《焊接》;19971031(第10期);第28-29页 * |
| 铝青铜的焊接工艺;李欢;《中国石油和化工标准与质量》;20110801(第8期);第91页 * |
| 铝青铜的熔化极氩弧堆焊-钢上堆焊铜;高慧玲;《机械工人》;19870430(第8期);第9-11页 * |
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