CN103447699A - Method for controlling welding deformation of titanium alloy - Google Patents
Method for controlling welding deformation of titanium alloy Download PDFInfo
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- CN103447699A CN103447699A CN2013103580038A CN201310358003A CN103447699A CN 103447699 A CN103447699 A CN 103447699A CN 2013103580038 A CN2013103580038 A CN 2013103580038A CN 201310358003 A CN201310358003 A CN 201310358003A CN 103447699 A CN103447699 A CN 103447699A
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Abstract
The invention relates to a method for controlling welding deformation of a titanium alloy. The method for controlling welding deformation of the titanium alloy comprises the steps of preparation before welding, positioned welding and welding implementation. According to the invention, real-time deformation data can be provided in the welding process and welding process parameters can be regulated on line according to the data, so that the aim of reducing and controlling welding deformation is fulfilled.
Description
Technical field
The invention belongs to the titanium alloy technical field of hot working, be specifically related to a kind of control method of titanium alloy welding deformation.
Background technology
Known, there is higher intensity under normal temperature and high temperature due to titanium alloy, good is moulding, toughness, stronger decay resistance and specific strength advantages of higher, occupy critical role in the new structural material adopted at industrial department, but the longitudinal modulus of elasticity of titanium is less than stainless steel, be about stainless 50%, under same welding stress effect, about one times than stainless steel of the welding deformation amount of titanium or titanium alloy, in order to solve titanium deformation of assembly welding problem, need to create certain welding condition, the deflection minimum that weldment is produced in the heating and cooling process, in order to prevent the weldment distortion, usually the measure of taking is: in the fixture of good rigidly, weld, adopt reversible deformation, adopt the fusion welding method of concentration of energy, such as electron beam welding etc., or postwelding is proofreaied and correct structure, all there is certain limitation in above measure when practical operation, if welding need to make special fixture in fixture, but the fixture cost is higher and can not be general, if the employing reversible deformation, but the welding deformation size has much relations, deflection to be difficult to prediction with input heat and personnel's operant level etc. when actual assembly welding, if adopt the fusion welding method of concentration of energy, new melting welding mode is expensive and have a limitation, if adopt postwelding to be proofreaied and correct structure, usually also need to make clamping fixture for correcting, and proofread and correct difficulty, the risk that exists weldment to scrap.
Summary of the invention
The control method of titanium alloy welding deformation of the present invention, the present invention can provide the real-time deformation data and can adjust welding condition according to online data in welding process, thereby reaches the purpose that reduces and control welding deformation.
For the purpose that realizes solving the problems of the technologies described above, the present invention has adopted following technical scheme:
A kind of control method of titanium alloy welding deformation, described method specifically comprises the steps:
Before the first step, weldering, prepare: weldment is fixed on dividing head, measuring dial gauge is fixed on Magnetic gauge stand, and dial indicator measuring head is contacted with weld heat-affected zone, rotate afterwards and adjust dividing head by the dial gauge pointer " 0 " position to dial scale, and the weldment even circumferential is divided into to 8 deciles, when being greater than 300mm, the weldment diameter can be divided into 16 deciles;
Second step, tack welding: the spacing of tack weld is 50～100mm, tack welding must be in symmetrical 2 weldings simultaneously, welding current is controlled at 30A～50A, argon flow amount 8～15L/min, after tack welding finishes, the argon gas time-delay closing is 10～20 seconds, the rotary index head, find out the maximum distortion zone according to dial gauge pointer situation of change afterwards;
The 3rd step, implement welding: the same tack welding of argon flow amount while formally welding, speed of welding is 200～250mm/ min, at first in distortion maximum region and the symmetrical region welding of being out of shape maximum region, afterwards in the two symmetrical region weldings with 90 ° of its deflections, the complete rotary index head of welding is found out the distortion maximum region in residue 4 zones, then in this zone and its symmetrical region welding, finally in residue two regional weldings, the complete argon gas time-delay closing of welding 15～30 seconds, after weldment is chilled to room temperature, the rotary index head is looked for the maximum distortion place, process operates with the first weld seam afterwards, until weld seam is filled up.
The control method of described titanium alloy welding deformation, implement in welding process in step 3, and welding current is controlled at 50A～250A, removes the limit capping when deflection is large while normally welding.
By adopting technique scheme, the present invention has following beneficial effect:
The control method of titanium alloy welding deformation of the present invention, adopt the present invention to carry out group welding piece to titanium alloy, can carry out on-line measurement to deflection, can also adjust at any time welding parameter and control deflection, deflection can be controlled in 0.5mm, and take the subregion welding can the rational weld seam order of optimization, using welding current as the reversible deformation measure, can be adjusted according to deformation, adopt the method for argon gas time-delay closing, can guarantee not oxidation of weld seam, and do not need to make special fixture and postwelding and proofread and correct, not only simplify working process but also save cost.
The specific embodiment
Below in conjunction with specific embodiment, the invention will be further described, so that those skilled in the art further understands the present invention, but following embodiment is not limiting the scope of the present invention.
The control method of titanium alloy welding deformation of the present invention, before the first step, weldering, prepare: weldment is fixed on dividing head, measuring dial gauge is fixed on Magnetic gauge stand, and dial indicator measuring head is contacted with weld heat-affected zone, rotate afterwards and adjust dividing head by the dial gauge pointer " 0 " position to dial scale, and the weldment even circumferential is divided into to 8 deciles, when being greater than 300mm, the weldment diameter can be divided into 16 deciles, second step, tack welding: the spacing of tack weld is 50～100mm, tack welding must be in symmetrical 2 weldings simultaneously, welding current is controlled at 30A～50A, argon flow amount 8～15L/min, after tack welding finishes, the argon gas time-delay closing is 10～20 seconds, the rotary index head, find out the maximum distortion zone according to dial gauge pointer situation of change afterwards, the 3rd step, implement welding: the same tack welding of argon flow amount while formally welding, speed of welding is 200～250mm/ min, at first in distortion maximum region and the symmetrical region welding of being out of shape maximum region, afterwards in the two symmetrical region weldings with 90 ° of its deflections, the complete rotary index head of welding is found out the distortion maximum region in residue 4 zones, then in this zone and its symmetrical region welding, finally in residue two regional weldings, the complete argon gas time-delay closing of welding 15～30 seconds, after weldment is chilled to room temperature, the rotary index head is looked for the maximum distortion place, process operates with the first weld seam afterwards, until weld seam is filled up, welding current is controlled at 50A～250A, removes the limit capping when deflection is large while normally welding, the present invention is specially adapted to adopt the accurate assembly welding of titanium alloy member of revolving structure of the manual argon arc welding of " V " shape and " X " shape groove.
Embodiment 1
Adopt assembly welding tube structure part of the present invention, structural member external diameter φ 140mm, wall thickness 3mm, adopt " V " shape groove, upper and lower cylinder inboard wall all has been finish-machined to fitted position, for the assembly welding of workpiece, be total to 10 these products of assembly welding, the ovality of weldering pre-test cylindrical shell and axiality are the 0.05mm left and right, adopting after assembly welding of the present invention 10 products to measure ovalitys is 0.15-0.2mm, axiality 0.05mm, illustrate that assembly welding causes the about 0.15mm of maximum deformation quantity, do not need reprocessing to reach matching requirements.
The embodiment selected in this article in order to disclose purpose of the present invention, current think suitable, but will be appreciated that, the present invention is intended to comprise that all belong to all changes and the improvement of this design and the interior embodiment of the scope of the invention.
Claims (2)
1. the control method of a titanium alloy welding deformation, it is characterized in that: described method specifically comprises the steps:
Before the first step, weldering, prepare: weldment is fixed on dividing head, measuring dial gauge is fixed on Magnetic gauge stand, and dial indicator measuring head is contacted with weld heat-affected zone, rotate afterwards and adjust dividing head by the dial gauge pointer " 0 " position to dial scale, and the weldment even circumferential is divided into to 8 deciles, when being greater than 300mm, the weldment diameter can be divided into 16 deciles;
Second step, tack welding: the spacing of tack weld is 50～100mm, tack welding must be in symmetrical 2 weldings simultaneously, welding current is controlled at 30A～50A, argon flow amount 8～15L/min, after tack welding finishes, the argon gas time-delay closing is 10～20 seconds, the rotary index head, find out the maximum distortion zone according to dial gauge pointer situation of change afterwards;
The 3rd step, implement welding: the same tack welding of argon flow amount while formally welding, speed of welding is 200～250mm/ min, at first in distortion maximum region and the symmetrical region welding of being out of shape maximum region, afterwards in the two symmetrical region weldings with 90 ° of its deflections, the complete rotary index head of welding is found out the distortion maximum region in residue 4 zones, then in this zone and its symmetrical region welding, finally in residue two regional weldings, the complete argon gas time-delay closing of welding 15～30 seconds, after weldment is chilled to room temperature, the rotary index head is looked for the maximum distortion place, process operates with the first weld seam afterwards, until weld seam is filled up.
2. the control method of titanium alloy welding deformation according to claim 1 is characterized in that: in step 3, implement in welding process, welding current is controlled at 50A～250A, removes the limit capping when deflection is large while normally welding.
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| CN2013103580038A CN103447699A (en) | 2013-08-16 | 2013-08-16 | Method for controlling welding deformation of titanium alloy |
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| CN2013103580038A CN103447699A (en) | 2013-08-16 | 2013-08-16 | Method for controlling welding deformation of titanium alloy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107498149A (en) * | 2017-10-24 | 2017-12-22 | 宝鸡市金海源钛标准件制品有限公司 | A kind of control method of titanium alloy welding deformation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004114064A (en) * | 2002-09-24 | 2004-04-15 | Toshiba Corp | Method and device for controlling welding distortion in welded structure |
| CN1554508A (en) * | 2003-12-26 | 2004-12-15 | 东方汽轮机厂 | Deformation control method for large structure piece welding |
| CN102029475A (en) * | 2010-12-28 | 2011-04-27 | 唐山轨道客车有限责任公司 | Welding deformation control method for aluminum alloy plate |
| KR20120137673A (en) * | 2011-06-13 | 2012-12-24 | 현대중공업 주식회사 | Welding method applicable inverse variation of welding distortion control |
-
2013
- 2013-08-16 CN CN2013103580038A patent/CN103447699A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004114064A (en) * | 2002-09-24 | 2004-04-15 | Toshiba Corp | Method and device for controlling welding distortion in welded structure |
| CN1554508A (en) * | 2003-12-26 | 2004-12-15 | 东方汽轮机厂 | Deformation control method for large structure piece welding |
| CN102029475A (en) * | 2010-12-28 | 2011-04-27 | 唐山轨道客车有限责任公司 | Welding deformation control method for aluminum alloy plate |
| KR20120137673A (en) * | 2011-06-13 | 2012-12-24 | 현대중공업 주식회사 | Welding method applicable inverse variation of welding distortion control |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107498149A (en) * | 2017-10-24 | 2017-12-22 | 宝鸡市金海源钛标准件制品有限公司 | A kind of control method of titanium alloy welding deformation |
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Owner name: LUOYANG SUNRAI TI PRECISION CASTING CO., LTD Free format text: FORMER OWNER: NO.725 INST. CHINA SHIPPING HEAVY INDUSTRY GROUP CORP. Effective date: 20131120 |
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Effective date of registration: 20131120 Address after: 471039 No. 38 Binhe North Road, Luoyang hi tech Development Zone, Henan, China Applicant after: Luoyang Sunrai Ti Precision Casting Co., Ltd Address before: 471023 Henan Province, Luoyang city Luolong District Binhe Road No. 169 Applicant before: No.725 Inst. China Shipping Heavy Industry Group Corp. |
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