CN104907685A - Large-thickness 35CrMnSi steel vacuum electron beam welding method - Google Patents
Large-thickness 35CrMnSi steel vacuum electron beam welding method Download PDFInfo
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- CN104907685A CN104907685A CN201510301960.6A CN201510301960A CN104907685A CN 104907685 A CN104907685 A CN 104907685A CN 201510301960 A CN201510301960 A CN 201510301960A CN 104907685 A CN104907685 A CN 104907685A
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- China
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- welding
- welded
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- 35crmnsi steel
- 35crmnsi
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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
- B23K15/00—Electron-beam welding or cutting
- B23K15/06—Electron-beam welding or cutting within a vacuum chamber
-
- 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
- B23K15/00—Electron-beam welding or cutting
- B23K15/0046—Welding
- B23K15/0053—Seam 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/16—Bands or sheets of indefinite length
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Abstract
The invention discloses a large-thickness 35CrMnSi steel vacuum electron beam welding method. Two to-be-welded 35CrMnSi steel plates with the thickness of 20 to 150mm are mechanically ground and placed in a vacuum chamber, wherein the suction vacuum degree of the vacuum chamber is controlled to be 10<-2> Pa to 10<-3> Pa, and the weld spacing between the two to-be-welded 35CrMnSi steel plates is controlled to be within 0.2mm; a focused electron beam is adopted to perform general welding on the weld spacing, and then a defocused electron beam is adopted to perform modification welding on the weld spacing; after electron beam welding is finished under a vacuum condition, the welded 35CrMnSi steel is placed in the vacuum chamber to be naturally cooled for 10 minutes; the vacuum degree of the vacuum chamber is removed, and the welded 35CrMnSi steel is taken out. The requirement of GJB 1718-2005I level on welding line quality is met, a single-surface welding dual-surface forming process can be realized without forming a bevel in a to-be-welded surface, the welding efficiency is obviously improved, the welding heat input amount is small, welding deformation is small, and the welding precision can be effectively controlled.
Description
Technical field
The invention belongs to welding technology field, be specifically related to a kind of vacuum electron beam welding method of heavy thickness 35CrMnSi steel.
Background technology
35CrMnSi steel belongs to middle carbon quenched and tempered steel, the carbon equivalent of 35CrMnSi steel is higher, welding cold cracking inclination is large, simultaneously very strong to the sensitiveness of heat, crisp hard tendency, very strict to the input requirements of heat, welding condition narrow range, produce hot cracking tendency large, the control difficulty of welding quality is very large.
At present TIG, MIG and MAG etc. are mainly contained to the welding method that 35CrMnSi steel is conventional, the heat input of these welding manners is relatively large, welding deformation is larger, seam organization is thick, welding quality is not good, particularly the 35CrMnSi steel of heavy thickness, needs bevel to carry out multi-pass welding, welding efficiency is low, and joint combination property is bad.
The people such as Chen Guoqing have carried out vacuum electron beam welding for the 35CrMnSi steel that 2mm is thick, obtain the welding point without metallurgical imperfection, and butt joint microstructure and property is studied (Chen Guoqing, Zhang Binggang, Wang Zhenbing, etc. vacuum electron beam welding 35CrMnSi steel [J]. welding journal, 2011,32 (9): 33-36.), this research mainly for the thick 35CrMnSi thin plate of 2mm, for being greater than the thick 35CrMnSi steel of 5mm and inapplicable.
So far, the electro-beam welding method for 20 ~ 150mm heavy thickness 35CrMnSi steel has no relevant report.
Summary of the invention
For solving the problem, the invention provides a kind of vacuum electron beam welding method of heavy thickness 35CrMnSi steel, the penetration capacity that the method utilizes electron beam welding to have is strong, heat input is little, speed of welding is fast, weld seam high purity under vacuum condition, weld dimensions tissue compare that arc welding is tiny, welding deformation and the feature such as residual stress is little, the 35CrMnSi steel of 20 ~ 150mm thickness can be implemented welding, welding efficiency is high, welding performance is stablized, and ensures welding quality.
For achieving the above object, the present invention adopts following technical scheme:
A vacuum electron beam welding method for heavy thickness 35CrMnSi steel, described heavy thickness refers to the 35CrMnSi steel of wall thickness in 20 ~ 150mm scope, this 35CrMnSi steel or sheet material, or foundry goods, or forging, and feature of the present invention is as follows:
First the surface to be welded of two 35CrMnSi steel to be welded is carried out mechanical grinding respectively, after mechanical grinding, with acetone, alcohol and ultrasonic wave, wipe oil is carried out to its surface to be welded again, for subsequent use after dry;
Two of above-mentioned drying for standby 35CrMnSi steel to be welded are placed in vacuum chamber, the weld spacing of two 35CrMnSi steel to be welded is adjusted by fixture, described weld spacing controls in 0.2mm, electron beam is accurately aimed at the mid point of described weld spacing either end, then implement to vacuumize to vacuum chamber, the suction of vacuum chamber controls 10
-2pa ~ 10
-3pa;
Focused beam is first adopted to implement general weldering to described weld spacing, now the accelerating potential of focused beam controls at 150KV, speed of welding controls at 200 ~ 800mm/min, the line of focused beam controls at 30 ~ 200mA, focused beam muzzle controls at 500 ~ 1300mm apart from the vertical range on two 35CrMnSi steel surfaces to be welded, the defocusing amount of focused beam is 0, this general weldering from the either end of described weld spacing to its other end;
Defocus(s)ed beam is adopted to implement to modify weldering to described weld spacing again, now the accelerating potential of defocus(s)ed beam controls at 150KV, speed of welding controls at 250 ~ 350mm/min, the line of defocus(s)ed beam controls at 20 ~ 30mA, defocus(s)ed beam muzzle controls at 500 ~ 1300mm apart from the vertical range on two 35CrMnSi steel surfaces to be welded, the defocusing amount of defocus(s)ed beam controls at 0.3 ~ 0.8mm, the described other end of weldering from described weld spacing of modifying, to its either end, so far completes the vacuum electron beam welding of two 35CrMnSi steel to be welded;
After under vacuum condition, electron beam welding completes, the 35CrMnSi steel welded is put and naturally cools 10min in a vacuum chamber, remove the vacuum of vacuum chamber afterwards, take out the 35CrMnSi steel welded, and butt welded seam joint samples and carries out intensity detection, requires strength factor >=0.90 of welding line joint.
Owing to adopting technical scheme described above, the present invention produces following good effect:
1, no matter the present invention is adopt focused beam welding or adopt defocus(s)ed beam welding, the concentration of energy of its electron beam, heat input is little, penetration capacity is strong, energy transformation ratio is high, controllability is good, make whole welding process time shorten, heat affected area reduction, weldquality meets the requirement of GJB 1718-2005 I level.
2, electron beam welding process of the present invention carries out in vacuum chamber, the impact vacuumizing the pernicious gas butt welded seam can effectively avoided in air of vacuum chamber, effectively improves the bond strength of weld seam.
3, electron beam welding of the present invention can realize the one side welding with back formation process of surface to be welded square groove, and welding efficiency significantly improves, the Weld Performance avoiding multi-layer multi-pass welding in prior art to cause and Quality Down problem.
4, electron beam welding of the present invention, its welding heat input quantity is little, and welding deformation is little, can the welding manufacture precision of effective control 35CrMnSi steel.
Detailed description of the invention
The present invention is a kind of vacuum electron beam welding method of heavy thickness 35CrMnSi steel, and described heavy thickness refers to the 35CrMnSi steel of wall thickness in 20 ~ 150mm scope, this 35CrMnSi steel or sheet material, or foundry goods, or forging.
The surface to be welded of two 35CrMnSi steel to be welded is first carried out mechanical grinding by the present invention respectively, carries out wipe oil again after mechanical grinding with acetone, alcohol and ultrasonic wave to its surface to be welded, for subsequent use after dry.
Two of above-mentioned drying for standby 35CrMnSi steel to be welded are placed in vacuum chamber, the weld spacing of two 35CrMnSi steel to be welded is adjusted by fixture, described weld spacing controls in 2mm, electron beam is accurately aimed at the mid point of described weld spacing either end, then implement to vacuumize to vacuum chamber, the suction of vacuum chamber controls 10
-2pa ~ 10
-3pa.
Focused beam is first adopted to implement general weldering to described weld spacing, now the accelerating potential of focused beam controls at 150KV, speed of welding controls at 200 ~ 800mm/min, the line of focused beam controls at 30 ~ 200mA, focused beam muzzle controls at 500 ~ 1300mm apart from the vertical range on two 35CrMnSi steel surfaces to be welded, the defocusing amount of focused beam is 0, this general weldering from the either end of described weld spacing to its other end;
Defocus(s)ed beam is adopted to implement to modify weldering to described weld spacing again, now the accelerating potential of defocus(s)ed beam controls at 150KV, speed of welding controls at 250 ~ 350mm/min, the line of defocus(s)ed beam controls at 20 ~ 30mA, defocus(s)ed beam muzzle controls at 500 ~ 1300mm apart from the vertical range on two 35CrMnSi steel surfaces to be welded, the defocusing amount of defocus(s)ed beam controls at 0.3 ~ 0.8mm, the described other end of weldering from described weld spacing of modifying, to its either end, so far completes the vacuum electron beam welding of two 35CrMnSi steel to be welded;
Can be there is face of weld and stay defect in electron beam, modify weldering and then can repair and stay defect in general weldering process, makes the more level and smooth polishing of face of weld, no matter general weldering or modifying weldering does not all dose other soldering material.
After under vacuum condition, electron beam welding completes, the 35CrMnSi steel welded is put and naturally cools 10min in a vacuum chamber, remove the vacuum of vacuum chamber afterwards, take out the 35CrMnSi steel welded, and butt welded seam joint samples and carries out intensity detection, requires strength factor >=0.90 of welding line joint.
In the present invention, the heat input of electron beam welding is little, and speed of welding is fast, the high purity of weld seam under vacuum, weld dimensions tissue compare conventional arc weldering tiny, welding deformation and residual stress little, the performance comparison of relative Gas Tungsten Arc Welding sees the following form.
Be of a size of the 35CrMnSi steel plate butt welding of 300 × 150 × 25mm for two pieces, its welding efficiency sees the following form.
Above-mentioned two tables absolutely prove: the present invention is obviously better than Gas Tungsten Arc Welding in tensile strength mean value, percentage elongation mean value, strength factor and welding efficiency.
Claims (1)
1. a vacuum electron beam welding method for heavy thickness 35CrMnSi steel, described heavy thickness refers to the 35CrMnSi steel of wall thickness in 20 ~ 150mm scope, and this 35CrMnSi steel or sheet material, or foundry goods, or forging, is characterized in that:
First the surface to be welded of two 35CrMnSi steel to be welded is carried out mechanical grinding respectively, after mechanical grinding, with acetone, alcohol and ultrasonic wave, wipe oil is carried out to its surface to be welded again, for subsequent use after dry;
Two of above-mentioned drying for standby 35CrMnSi steel to be welded are placed in vacuum chamber, the weld spacing of two 35CrMnSi steel to be welded is adjusted by fixture, described weld spacing controls in 0.2mm, electron beam is accurately aimed at the mid point of described weld spacing either end, then implement to vacuumize to vacuum chamber, the suction of vacuum chamber controls 10
-2pa ~ 10
-3pa;
Focused beam is first adopted to implement general weldering to described weld spacing, now the accelerating potential of focused beam controls at 150KV, speed of welding controls at 200 ~ 800mm/min, the line of focused beam controls at 30 ~ 200mA, focused beam muzzle controls at 500 ~ 1300mm apart from the vertical range on two 35CrMnSi steel surfaces to be welded, the defocusing amount of focused beam is 0mm, this general weldering from the either end of described weld spacing to its other end;
Defocus(s)ed beam is adopted to implement to modify weldering to described weld spacing again, now the accelerating potential of defocus(s)ed beam controls at 150KV, speed of welding controls at 250 ~ 350mm/min, the line of defocus(s)ed beam controls at 20 ~ 30mA, defocus(s)ed beam muzzle controls at 500 ~ 1300mm apart from the vertical range on two 35CrMnSi steel surfaces to be welded, the defocusing amount of defocus(s)ed beam controls at 0.3 ~ 0.8mm, the described other end of weldering from described weld spacing of modifying, to its either end, so far completes the vacuum electron beam welding of two 35CrMnSi steel to be welded;
After under vacuum condition, electron beam welding completes, the 35CrMnSi steel welded is put and naturally cools 10min in a vacuum chamber, remove the vacuum of vacuum chamber afterwards, take out the 35CrMnSi steel welded, and butt welded seam joint samples and carries out intensity detection, requires strength factor >=0.90 of welding line joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510301960.6A CN104907685A (en) | 2015-06-04 | 2015-06-04 | Large-thickness 35CrMnSi steel vacuum electron beam welding method |
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|---|---|---|---|
| CN201510301960.6A CN104907685A (en) | 2015-06-04 | 2015-06-04 | Large-thickness 35CrMnSi steel vacuum electron beam welding method |
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|---|---|
| CN104907685A true CN104907685A (en) | 2015-09-16 |
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| CN201510301960.6A Pending CN104907685A (en) | 2015-06-04 | 2015-06-04 | Large-thickness 35CrMnSi steel vacuum electron beam welding method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106141411A (en) * | 2016-08-12 | 2016-11-23 | 中国船舶重工集团公司第七二五研究所 | The electron beam welding tool of a kind of aircraft cylinder and wing and welding procedure |
| CN106695106A (en) * | 2016-12-09 | 2017-05-24 | 天津大学 | Vacuum electron beam welding method and application of vacuum electron beam welding method to welding of hydroelectric steel |
| RU2635592C2 (en) * | 2016-03-17 | 2017-11-14 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Томский государственный университет систем управления и радиоэлектроники" (ТУСУР) | Method of electron-beam welding glass tube parts |
Citations (5)
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|---|---|---|---|---|
| FR2330490A1 (en) * | 1975-08-01 | 1977-06-03 | Metalimphy Techmeta Sa | Electron beam welding machine - for adjacently joining at least three metal strips |
| JPH06155043A (en) * | 1992-11-26 | 1994-06-03 | Mitsubishi Heavy Ind Ltd | Electron beam welding method for high-gas-component based material |
| CN1762636A (en) * | 2004-10-22 | 2006-04-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Vacuum electron beam welding method for thin-walled titanium alloy assembly |
| WO2008031581A1 (en) * | 2006-09-12 | 2008-03-20 | Shw Casting Technologies Gmbh | Method for producing a roller body and roller body |
| CN104439676A (en) * | 2014-11-24 | 2015-03-25 | 中国核动力研究设计院 | CLF-1 thick steel plate electron beam welding process |
-
2015
- 2015-06-04 CN CN201510301960.6A patent/CN104907685A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2330490A1 (en) * | 1975-08-01 | 1977-06-03 | Metalimphy Techmeta Sa | Electron beam welding machine - for adjacently joining at least three metal strips |
| JPH06155043A (en) * | 1992-11-26 | 1994-06-03 | Mitsubishi Heavy Ind Ltd | Electron beam welding method for high-gas-component based material |
| CN1762636A (en) * | 2004-10-22 | 2006-04-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Vacuum electron beam welding method for thin-walled titanium alloy assembly |
| WO2008031581A1 (en) * | 2006-09-12 | 2008-03-20 | Shw Casting Technologies Gmbh | Method for producing a roller body and roller body |
| CN104439676A (en) * | 2014-11-24 | 2015-03-25 | 中国核动力研究设计院 | CLF-1 thick steel plate electron beam welding process |
Non-Patent Citations (1)
| Title |
|---|
| 陈国庆等: "真空电子束焊接35CrMnSi 钢", 《焊接学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2635592C2 (en) * | 2016-03-17 | 2017-11-14 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Томский государственный университет систем управления и радиоэлектроники" (ТУСУР) | Method of electron-beam welding glass tube parts |
| CN106141411A (en) * | 2016-08-12 | 2016-11-23 | 中国船舶重工集团公司第七二五研究所 | The electron beam welding tool of a kind of aircraft cylinder and wing and welding procedure |
| CN106141411B (en) * | 2016-08-12 | 2018-07-24 | 中国船舶重工集团公司第七二五研究所 | A kind of electron beam welding tool and welding procedure of aircraft cylinder and wing |
| CN106695106A (en) * | 2016-12-09 | 2017-05-24 | 天津大学 | Vacuum electron beam welding method and application of vacuum electron beam welding method to welding of hydroelectric steel |
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Application publication date: 20150916 |
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