CN1600485A - Method for welding impellers in high strength and eliminating stress of impellers - Google Patents
Method for welding impellers in high strength and eliminating stress of impellers Download PDFInfo
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- CN1600485A CN1600485A CN 200410065103 CN200410065103A CN1600485A CN 1600485 A CN1600485 A CN 1600485A CN 200410065103 CN200410065103 CN 200410065103 CN 200410065103 A CN200410065103 A CN 200410065103A CN 1600485 A CN1600485 A CN 1600485A
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Abstract
A method for welding the high-strength blade wheel and eliminating its stress includes point welding between the back disk and blades which regulating angle and deformatino, symmetrical welding, annealing, splicing front disk to it by mould, welding in said manner, heating to 590-620 deg.C at 140-160 deg.C/hr holding the temp for 1.5-2.5 hrs, and cooling.
Description
Technical field:
The present invention relates to the welding technique in the mechanical workout, is a kind of welding processing technology of fan part, specifically, is a kind of impellers in high strength welding and the method that eliminates stress.
Background technology:
Power station fan is to make the higher product of processing request, because it has high rotating speed and the load of frequent variations, cause the requirement of strength of this type of draught fan impeller especially high, in order to solve strength problem, usually select high-strength material as blade and the shroud of impeller, but this simultaneously again to blade and shroud, impeller in the welding procedure of wheel disc, and the process for relieving stress of impeller integral body is had higher requirement, often owing to the bad impeller that causes of the assurance of welding procedure or process for relieving stress is produced unnecessary distortion, finally cause scrapping of product.
Summary of the invention:
The purpose of this invention is to provide a kind of assurance weld strength, reduce the residual stress after welding, kept again impellers in high strength welding and the method that eliminates stress of the high-intensity performance of material simultaneously.
Technical solution of the present invention is: a kind of impellers in high strength welding and the method that eliminates stress is characterized in that: at first be welding impeller and hub disk, during welding, put impeller and hub disk solid earlier, and adjust angle and deflection, and be to be symmetrically welded then, anneal after welding is good; Next is welding impeller and shroud, earlier the impeller after the assembly unit is fixed on the mold, welds then shroud and blade angle weld seam, and welding sequence and method are with welding hub disk and impeller; Secondly be that integrated stress is eliminated again, earlier workpiece be placed in the burner hearth, be warming up to gradually 590-620 ℃, programming rate 140-160 ℃/h, be incubated 1.5-2.5 hour, cool to again normal temperature with the furnace.
The speed of cooling that cools to normal temperature with the furnace described in the present invention is 120-180 ℃/h.The method of adjusting deflection is a pading plate under inner ring, to form 2 °-3 ° the deflection that presets.Annealing after welding is good refers to: after blade and dish welding are good, radially carrying out homogeneous heating with welding gun flame, temperature should be in annealing range.When integrated stress is eliminated, can also be warming up to 590-620 ℃ gradually, heat-up rate 140-160 ℃/h, be incubated 1.8-2.2 hour, cool to normal temperature again with the furnace, speed of cooling is 140-160 ℃/h.Technological parameter during welding is: welding current is 180-200A; Speed of welding is 220-250mm/min; Weldingvoltage is 25-32V; Weld width is 15-20mm.
Beneficial effect of the present invention is: guaranteed that weld strength and high-strength material are close, can be used for the welding of high-strength material.Reduced the residual stress after the welding, also kept the high-intensity performance of material, solved and eliminate stress and keep high-intensity contradiction.
The present invention is described in further detail below in conjunction with embodiment:
Embodiment:
Embodiment one:
At first being welding impeller and hub disk, during welding, earlier impeller and hub disk being put admittedly, and adjusted angle and deflection, is to be symmetrically welded then, anneals after welding is good; Next is welding impeller and shroud, earlier the impeller after the assembly unit is fixed on the mold, welds then shroud and blade angle weld seam, and welding sequence and method are with welding hub disk and impeller; Secondly be that integrated stress is eliminated again, earlier workpiece be placed in the burner hearth, be warming up to gradually 590-620 ℃, programming rate 140-160 ℃, be incubated 1.8-2.2 hour, cool to again normal temperature with the furnace, cooling velocity is 140-160 ℃/h.The method of adjusting deflection is pading plate under inner ring (as 5mm), to form 2 °-3 ° the deflection that presets.Annealing after welding is good refers to: after blade and dish welding are good, radially carrying out homogeneous heating with welding gun flame, temperature should be in annealing range.When integrated stress was eliminated, the technological parameter during welding was: welding current is 180-200A; Speed of welding is 220-250mm/min; Weldingvoltage is 25-32V; Weld width is 15-20mm.
Embodiment two:
At first being welding impeller and hub disk, during welding, earlier impeller and hub disk being put admittedly, and adjusted angle and deflection, is to be symmetrically welded then, anneals after welding is good; Next is welding impeller and shroud, earlier the impeller after the assembly unit is fixed on the mold, welds then shroud and blade angle weld seam, and welding sequence and method are with welding hub disk and impeller; Secondly be that integrated stress is eliminated again, earlier workpiece be placed in the burner hearth that be warming up to gradually 590 ℃, 120 ℃ of programming rates are incubated 1.5 hours, cool to normal temperature with the furnace again.The described speed of cooling that cools to normal temperature with the furnace is 120 ℃/h.The method of adjusting deflection is pading plate under inner ring (as 5mm), to form 2 °-3 ° the deflection that presets.Annealing after welding is good refers to: after blade and dish welding are good, radially carrying out homogeneous heating with welding gun flame, temperature should be in annealing range.Technological parameter during welding is: welding current is 180A; Speed of welding is 220mm/min; Weldingvoltage is 25V; Weld width is 15mm.
Embodiment three:
At first being welding impeller and hub disk, during welding, earlier impeller and hub disk being put admittedly, and adjusted angle and deflection, is to be symmetrically welded then, anneals after welding is good; Next is welding impeller and shroud, earlier the impeller after the assembly unit is fixed on the mold, welds then shroud and blade angle weld seam, and welding sequence and method are with welding hub disk and impeller; Secondly be that integrated stress is eliminated again, earlier workpiece be placed in the burner hearth that be warming up to gradually 600 ℃, 150 ℃/h of programming rate is incubated 2 hours, cools to normal temperature with the furnace again.The described speed of cooling that cools to normal temperature with the furnace is 150 ℃/h.The method of adjusting deflection is pading plate under inner ring (as 5mm), to form 2 °-3 ° the deflection that presets.Annealing after welding is good refers to: after blade and dish welding are good, radially carrying out homogeneous heating with welding gun flame, temperature should be in annealing range.Technological parameter during welding is: welding current is 190A; Speed of welding is 235mm/min; Weldingvoltage is 28.5V; Weld width is 17.5mm.
Embodiment four:
At first being welding impeller and hub disk, during welding, earlier impeller and hub disk being put admittedly, and adjusted angle and deflection, is to be symmetrically welded then, anneals after welding is good; Next is welding impeller and shroud, earlier the impeller after the assembly unit is fixed on the mold, welds then shroud and blade angle weld seam, and welding sequence and method are with welding hub disk and impeller; Secondly be that integrated stress is eliminated again, earlier workpiece be placed in the burner hearth that be warming up to gradually 620 ℃, 160 ℃/h of programming rate is incubated 2.5 hours, cools to normal temperature with the furnace again.The described speed of cooling that cools to normal temperature with the furnace is 160 ℃/h.The method of adjusting deflection is pading plate under inner ring (as 5mm), to form 2 °-3 ° the deflection that presets.Annealing after welding is good refers to: after blade and dish welding are good, radially carrying out homogeneous heating with welding gun flame, temperature should be in annealing range.Technological parameter during welding is: welding current is 200A; Speed of welding is 250mm/min; Weldingvoltage is 32V; Weld width is 20mm.
Embodiment five:
At first being welding impeller and hub disk, during welding, earlier impeller and hub disk being put admittedly, and adjusted angle and deflection, is to be symmetrically welded then, anneals after welding is good; Next is welding impeller and shroud, earlier the impeller after the assembly unit is fixed on the mold, welds then shroud and blade angle weld seam, and welding sequence and method are with welding hub disk and impeller; Secondly be that integrated stress is eliminated again, earlier workpiece be placed in the burner hearth that be warming up to gradually 590 ℃, 140 ℃/h of programming rate is incubated 1.8 hours, cools to normal temperature with the furnace again, cooling velocity is 140 ℃/h.The method of adjusting deflection is pading plate under inner ring (as 5mm), to form 2 °-3 ° the deflection that presets.Annealing after welding is good refers to: after blade and dish welding are good, radially carrying out homogeneous heating with welding gun flame, temperature should be in annealing range.When integrated stress was eliminated, the technological parameter during welding was: welding current is 180A; Speed of welding is 220mm/min; Weldingvoltage is 25V; Weld width is 15mm.
Embodiment six:
At first being welding impeller and hub disk, during welding, earlier impeller and hub disk being put admittedly, and adjusted angle and deflection, is to be symmetrically welded then, anneals after welding is good; Next is welding impeller and shroud, earlier the impeller after the assembly unit is fixed on the mold, welds then shroud and blade angle weld seam, and welding sequence and method are with welding hub disk and impeller; Secondly be that integrated stress is eliminated again, earlier workpiece be placed in the burner hearth that be warming up to gradually 620 ℃, 155 ℃/h of programming rate is incubated 2.2 hours, cools to normal temperature with the furnace again, cooling velocity is 155 ℃/h.The method of adjusting deflection is pading plate under inner ring (as 5mm), to form 2 °-3 ° the deflection that presets.Annealing after welding is good refers to: after blade and dish welding are good, radially carrying out homogeneous heating with welding gun flame, temperature should be in annealing range.When integrated stress was eliminated, the technological parameter during welding was: welding current is 200A; Speed of welding is 250mm/min; Weldingvoltage is 32V; Weld width is 20mm.
Claims (6)
1, a kind of impellers in high strength welding and the method that eliminates stress is characterized in that: at first being welding impeller and hub disk, during welding, earlier impeller and hub disk being put admittedly, and adjusted angle and deflection, is to be symmetrically welded then, anneals after welding is good; Next is welding impeller and shroud, earlier the impeller after the assembly unit is fixed on the mold, welds then shroud and blade angle weld seam, and welding sequence and method are with welding hub disk and impeller; Secondly be that integrated stress is eliminated again, earlier workpiece be placed in the burner hearth, be warming up to gradually 590-620 ℃, programming rate 140-160 ℃/h, be incubated 1.5-2.5 hour, cool to again normal temperature with the furnace.
2, the impellers in high strength welding according to claim 1 and the method that eliminates stress, it is characterized in that: the speed of cooling that cools to normal temperature with the furnace is 140-160 ℃/h.
3, the impellers in high strength according to claim 1 and 2 welding and the method that eliminates stress, it is characterized in that: the method for adjusting deflection is a pading plate under inner ring, to form 2 °-3 ° the deflection that presets.
4, impellers in high strength welding according to claim 1 and 2 and the method that eliminates stress is characterized in that: the annealing after welding is good refers to: after blade and dish welding are good, radially carrying out homogeneous heating with welding gun flame, temperature should be in annealing range.
5, the impellers in high strength welding according to claim 1 and 2 and the method that eliminates stress is characterized in that: when integrated stress is eliminated, be warming up to 590-620 ℃ gradually, heat-up rate 140-160 ℃/h, be incubated 1.8-2.2 hour, cool to normal temperature again with the furnace, speed of cooling is 140-160 ℃/h.
6, impellers in high strength welding according to claim 1 and 2 and the method that eliminates stress, it is characterized in that: the technological parameter during welding is: welding current is 180-200A; Speed of welding is 220-250mm/min; Weldingvoltage is 25-32V; Weld width is 15-20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100651032A CN1301820C (en) | 2004-10-20 | 2004-10-20 | Method for welding impellers in high strength and eliminating stress of impellers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100651032A CN1301820C (en) | 2004-10-20 | 2004-10-20 | Method for welding impellers in high strength and eliminating stress of impellers |
Publications (2)
| Publication Number | Publication Date |
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| CN1600485A true CN1600485A (en) | 2005-03-30 |
| CN1301820C CN1301820C (en) | 2007-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100651032A Expired - Fee Related CN1301820C (en) | 2004-10-20 | 2004-10-20 | Method for welding impellers in high strength and eliminating stress of impellers |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1880776B (en) * | 2005-06-15 | 2010-06-09 | 赵世臣 | Process for producing fan impeller |
| CN104763574A (en) * | 2014-01-08 | 2015-07-08 | 阿尔斯通再生能源技术公司 | Method for fabricating a francis-type runner for a hydraulic machine, and runner fabricated using such a method |
| CN107639325A (en) * | 2017-09-27 | 2018-01-30 | 阳江市五金刀剪产业技术研究院 | A kind of method for welding blade and cover plate |
| CN107900331A (en) * | 2017-10-17 | 2018-04-13 | 安徽工程大学 | A kind of laser 3D printing molding machine for effectively preventing metallic alloy piece from cracking |
| CN110000522A (en) * | 2019-04-30 | 2019-07-12 | 江苏金通灵流体机械科技股份有限公司 | A kind of welding method of complete penetraction and fusion in welding impeller |
| CN110125566A (en) * | 2019-04-25 | 2019-08-16 | 沈阳透平机械股份有限公司 | A kind of processing method of three weldering impellers suitable for centrifugal compressor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD145281A1 (en) * | 1979-06-21 | 1980-12-03 | Dieter Bahnert | HEAT TREATMENT OF WELDED RADIAL SHARPENERS, ESPECIALLY FOR CIRCULAR COMPRESSORS |
| JPH01202389A (en) * | 1988-02-05 | 1989-08-15 | Hitachi Ltd | Manufacture of steam turbine long blade |
| CN1116955C (en) * | 2000-07-21 | 2003-08-06 | 燕山大学 | Medium flash welding method for high manganese steel frog and carbon steel rail |
-
2004
- 2004-10-20 CN CNB2004100651032A patent/CN1301820C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1880776B (en) * | 2005-06-15 | 2010-06-09 | 赵世臣 | Process for producing fan impeller |
| CN104763574A (en) * | 2014-01-08 | 2015-07-08 | 阿尔斯通再生能源技术公司 | Method for fabricating a francis-type runner for a hydraulic machine, and runner fabricated using such a method |
| CN107639325A (en) * | 2017-09-27 | 2018-01-30 | 阳江市五金刀剪产业技术研究院 | A kind of method for welding blade and cover plate |
| CN107900331A (en) * | 2017-10-17 | 2018-04-13 | 安徽工程大学 | A kind of laser 3D printing molding machine for effectively preventing metallic alloy piece from cracking |
| CN107900331B (en) * | 2017-10-17 | 2019-12-06 | 安徽工程大学 | laser 3D printing forming equipment capable of effectively preventing metal alloy component from cracking |
| CN110125566A (en) * | 2019-04-25 | 2019-08-16 | 沈阳透平机械股份有限公司 | A kind of processing method of three weldering impellers suitable for centrifugal compressor |
| CN110125566B (en) * | 2019-04-25 | 2021-06-11 | 沈阳透平机械股份有限公司 | Machining method of three-piece welded impeller suitable for centrifugal compressor |
| CN110000522A (en) * | 2019-04-30 | 2019-07-12 | 江苏金通灵流体机械科技股份有限公司 | A kind of welding method of complete penetraction and fusion in welding impeller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1301820C (en) | 2007-02-28 |
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