CN104416258A - Method for controlling defect generation of beryllium zirconium alloy outside welding seam of brazing subassembly - Google Patents
Method for controlling defect generation of beryllium zirconium alloy outside welding seam of brazing subassembly Download PDFInfo
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- CN104416258A CN104416258A CN201310412051.0A CN201310412051A CN104416258A CN 104416258 A CN104416258 A CN 104416258A CN 201310412051 A CN201310412051 A CN 201310412051A CN 104416258 A CN104416258 A CN 104416258A
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- China
- Prior art keywords
- beryllium
- annex
- receptor
- soldering
- sub
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
- B23K1/206—Cleaning
Abstract
The invention belongs to the technical field of heavy water reactor nuclear fuel rod cluster manufacturing, in particular to a method for controlling the defect generation of beryllium zirconium alloy outside a welding seam of a brazing subassembly. The method comprises the following steps of an accessory manufacturing process: in support pad milling and isolation block punching and chamfering processes, burrs at the edge parts of accessories are eliminated, cooling liquid is adopted for cooling in the support pad milling process, the dimension of an isolation block is controlled in a process control range, and each dimension of a support pad is respectively controlled to be below a middle value in the process range; an accessory cleaning process: water in a fourth-groove rinsing groove of a cleaning machine is changed once every day, an alcohol dehydration work procedure is added before the support pad and the isolation pad enter a drying box; an accessory beryllium coating process: a beryllium layer of the accessories is controlled to be below a middle value in the process range in actual production; a brazing process: lower welding parameters are possibly adopted under the condition of ensuring the welding quality, the use periods of a sensor are set to be 60 to 80 periods, the hole diameter of the sensor is regularly measured, and the reaming is carried out on the hole diameter of the sensor.
Description
Technical field
The invention belongs to PHWR nuclear fuel cluster manufacturing technology field, be specifically related to a kind of method controlling the outer beryllium zircaloy defect of soldering sub-assembly weld seam and produce.
Background technology
Soldering is that PHWR nuclear fuel cluster manufactures important link.In brazing process, usually form the defect that our custom a kind of is called " beryllium zircaloy ", main manifestations is solder outflow, forms beryllium zircaloy at weld edge, is topmost rejecting defective during current PHWR nuclear fuel cluster manufactures.
In addition, soldering is the intermediate link that PHWR nuclear fuel cluster manufactures, annex before it (annex is support pads, the general designation of thin spacing block and thick spacing block) manufacturing process, annex cleaning, annex is coated with beryllium technique, spot-welding technology all can have impact to the generation of the outer beryllium zircaloy defect of soldering sub-assembly weld seam, therefore need set about from these technique aborning, system set up a kind of method controlling the outer beryllium zircaloy defect of soldering sub-assembly weld seam and produce.
The enterprise being engaged in the manufacture of PHWR nuclear fuel cluster at present is both at home and abroad little, and very few about the soldering research data of beryllium and zirconium, so referential knowwhy and practical experience are also little aborning.
Summary of the invention
The present invention with the outer beryllium zircaloy defect of soldering sub-assembly weld seam for research object, analyze and research to soldering processes and to the influential annex manufacturing process of soldering, annex cleaning, annex painting beryllium technique, spot-welding technology, finally determine major influence factors, set up control method.
For achieving the above object, the technical solution used in the present invention is:
Control the method that the outer beryllium zircaloy defect of soldering sub-assembly weld seam produces, comprise the steps:
(1) annex manufacturing process: the first, in support pads milling, spacing block punching and chamfer process, eliminates the burr of annex edge, adopts cooling fluid to cool in support pads milling process; The second, spacing block size Control is in technology controlling and process scope, and the every size of support pads all controls in processing range intermediate value on the lower side;
(2) annex cleaning: the first, changes the water of cleaning machine the 4th groove potcher for 1 day 1; The second, before support pads, spacing block enter baking oven, add dehydration of alcohol operation;
(3) annex is coated with beryllium technique: in actual production, the beryllium layer of annex controls in processing range intermediate value on the lower side;
(4) soldering processes: the first, when ensureing welding quality, adopt lower welding parameter as far as possible; The second, receptor life cycle is decided to be 60 ~ 80 cycles, and periodic measurement receptor aperture, reaming is carried out to receptor aperture.
Described (3) annex is coated with beryllium technique: in actual production, the beryllium layer of annex controls in processing range intermediate value on the lower side, is specially: thin spacing block, 14.8 μm about-15.5 μm; Thick spacing block, about 13.0-13.8 μm; Support pads, 11.8 μm about-13.0 μm.
Described (3) annex is coated with beryllium technique: press strip support pads being coated with beryllium feed collet is replaced by square by circle.
Described (4) soldering processes: the first, when ensureing welding quality, as far as possible adopting lower welding parameter, being specially: the bonding power of inner ring sub-assembly controls 58% ~ 63%, weld interval 40 ~ 58s; Outer shroud sub-assembly is after replacing receptor, and initial bonding power is 62%, and weld interval is 55s.
Described (4) soldering processes: the second, carry out reaming by receptor reaming tool, and receptor reaming tool is the cylindrical structural with tapering.
Beneficial effect acquired by the present invention is:
By the method that the outer beryllium zircaloy defect of control soldering sub-assembly weld seam of the present invention produces, in PHWR nuclear fuel cluster production process, within the scope of process control needs, internal control scope is established to beryllium material use amount, beryllium layer thickness; Optimize Welding technological parameter; Shorten receptor life cycle, and designed and produced receptor reaming tool, set up expanding method; Set up annex processing internal control index; Design and produce new painting beryllium feed collet.By the setup and apply of above method, beryllium zircaloy defect in brazing process is made to obtain effective control.
Because soldering is the intermediate link that sub-assembly is produced, the generation of the outer beryllium zircaloy defect of soldering sub-assembly weld seam is not only controlled by the present invention, and annex manufacturing process, annex cleaning, annex painting beryllium technique, the spot-welding technology before optimizing it, also follow-up graphitization, cleaning cutting fixed length, pellet tubulature, end plug Welding is conducive to, therefore good effect of the present invention, run through whole cluster assembly line, thus also promoted whole cluster and to manufacture a product the raising of quality.
Meanwhile, because of at present little with the research of zirconium soldering about beryllium, be also this time we in conjunction with PHWR nuclear fuel cluster manufacture soldering processes, to the trial exploratory development of beryllium and zirconium soldering.In addition, activity of the present invention is carried out at basic unit's production unit, from production reality, solves the practical problem that restriction is produced.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.
The method that the outer beryllium zircaloy defect of control soldering sub-assembly weld seam of the present invention produces comprises the steps:
(1) annex manufacturing process: the first, in support pads milling, spacing block punching, chamfer process, eliminates the burr of annex edge, the oil cooling in support pads milling process is but changed into cooling fluid cooling; The second, spacing block size Control is in technology controlling and process scope, and the every size of support pads all controls in processing range intermediate value on the lower side.
(2) annex cleaning: the first, changes to 1 day 1 by the water of cleaning machine the 4th groove potcher change by within 3 days 1, to change, improve rinsing cleannes; The second, before support pads, spacing block enter baking oven, add this operation of dehydration of alcohol, avoid water stain generation.
(3) annex is coated with beryllium technique: the first, and in actual production, the beryllium layer of annex controls in processing range intermediate value on the lower side: thin spacing block, 14.8 μm about-15.5 μm; Thick spacing block, about 13.0-13.8 μm; Support pads, 11.8 μm about-13.0 μm; The second, press strip support pads being coated with beryllium feed collet is replaced by square by circle.
(4) soldering processes: the first, when ensureing welding quality, adopt lower welding parameter as far as possible.The bonding power of inner ring sub-assembly controls 58% ~ 63%, weld interval 40 ~ 58s; Outer shroud sub-assembly is after replacing receptor, and initial bonding power is 62%, and weld interval is 55s.Change in life cycle at whole receptor, according to the welding quality situation of every stove, carry out bonding power and mate with the suitable of weld interval.Second, although receptor life cycle, for being no more than 100 cycles, in order to ensure a good vacuum welding environment, is decided to be 60 ~ 80 cycles by the life cycle of regulation impression hereof, and periodic measurement receptor aperture, reaming is carried out to receptor aperture.Carry out reaming by receptor reaming tool, receptor reaming tool is the cylindrical structural with tapering.
Claims (5)
1. control the method that the outer beryllium zircaloy defect of soldering sub-assembly weld seam produces, it is characterized in that: the method comprises the steps:
(1) annex manufacturing process: the first, in support pads milling, spacing block punching and chamfer process, eliminates the burr of annex edge, adopts cooling fluid to cool in support pads milling process; The second, spacing block size Control is in technology controlling and process scope, and the every size of support pads all controls in processing range intermediate value on the lower side;
(2) annex cleaning: the first, changes the water of cleaning machine the 4th groove potcher for 1 day 1; The second, before support pads, spacing block enter baking oven, add dehydration of alcohol operation;
(3) annex is coated with beryllium technique: in actual production, the beryllium layer of annex controls in processing range intermediate value on the lower side;
(4) soldering processes: the first, when ensureing welding quality, adopt lower welding parameter as far as possible; The second, receptor life cycle is decided to be 60 ~ 80 cycles, and periodic measurement receptor aperture, reaming is carried out to receptor aperture.
2. the method for the outer beryllium zircaloy defect generation of control soldering sub-assembly weld seam according to claim 1, it is characterized in that: described (3) annex is coated with beryllium technique: in actual production, the beryllium layer of annex controls in processing range intermediate value on the lower side, be specially: thin spacing block, 14.8 μm about-15.5 μm; Thick spacing block, about 13.0-13.8 μm; Support pads, 11.8 μm about-13.0 μm.
3. the method for the outer beryllium zircaloy defect generation of control soldering sub-assembly weld seam according to claim 1, is characterized in that: described (3) annex is coated with beryllium technique: press strip support pads being coated with beryllium feed collet is replaced by square by circle.
4. the method for the outer beryllium zircaloy defect generation of control soldering sub-assembly weld seam according to claim 1, it is characterized in that: described (4) soldering processes: first, when ensureing welding quality, adopt lower welding parameter as far as possible, be specially: the bonding power of inner ring sub-assembly controls 58% ~ 63%, weld interval 40 ~ 58s; Outer shroud sub-assembly is after replacing receptor, and initial bonding power is 62%, and weld interval is 55s.
5. the method for the outer beryllium zircaloy defect generation of control soldering sub-assembly weld seam according to claim 1, it is characterized in that: described (4) soldering processes: second, carry out reaming by receptor reaming tool, receptor reaming tool is the cylindrical structural with tapering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310412051.0A CN104416258A (en) | 2013-09-11 | 2013-09-11 | Method for controlling defect generation of beryllium zirconium alloy outside welding seam of brazing subassembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310412051.0A CN104416258A (en) | 2013-09-11 | 2013-09-11 | Method for controlling defect generation of beryllium zirconium alloy outside welding seam of brazing subassembly |
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| CN104416258A true CN104416258A (en) | 2015-03-18 |
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| CN201310412051.0A Pending CN104416258A (en) | 2013-09-11 | 2013-09-11 | Method for controlling defect generation of beryllium zirconium alloy outside welding seam of brazing subassembly |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1181597A (en) * | 1996-06-26 | 1998-05-13 | 株式会社日立制作所 | Fuel assembly and fuel assembly channel box manufacturing method |
| CN1197533A (en) * | 1996-06-14 | 1998-10-28 | 法玛通公司 | Absorbent pencil for a nuclear reactor control cluster, and method for making same |
| CA2121945C (en) * | 1994-04-22 | 2002-01-29 | Gerry Downie | Fused beryllium-zirconium brazing process |
-
2013
- 2013-09-11 CN CN201310412051.0A patent/CN104416258A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2121945C (en) * | 1994-04-22 | 2002-01-29 | Gerry Downie | Fused beryllium-zirconium brazing process |
| CN1197533A (en) * | 1996-06-14 | 1998-10-28 | 法玛通公司 | Absorbent pencil for a nuclear reactor control cluster, and method for making same |
| CN1181597A (en) * | 1996-06-26 | 1998-05-13 | 株式会社日立制作所 | Fuel assembly and fuel assembly channel box manufacturing method |
Non-Patent Citations (5)
| Title |
|---|
| 吴德蕙: "钎焊在原子能工业中的应用", 《核动力工程》 * |
| 宋德军: "铍焊接技术研究发展概况", 《材料导报》 * |
| 张富东: "CANDU-6型核燃料元件制造钎焊一次焊合率的控制", 《原子能科学技术》 * |
| 李冠兴: "《重水堆燃料元件》", 30 April 2007, 化学工业出版社 * |
| 李银些: "CANDU6燃料元件制造质量过程控制", 《中国核科学技术进展报告（第二卷）》 * |
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Application publication date: 20150318 |