CN113000840A - Zirconium alloy framework laser additive manufacturing method - Google Patents
Zirconium alloy framework laser additive manufacturing method Download PDFInfo
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- CN113000840A CN113000840A CN201911325464.9A CN201911325464A CN113000840A CN 113000840 A CN113000840 A CN 113000840A CN 201911325464 A CN201911325464 A CN 201911325464A CN 113000840 A CN113000840 A CN 113000840A
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- Prior art keywords
- zirconium alloy
- laser
- additive manufacturing
- laser scanning
- framework
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention belongs to the technical field of nuclear fuel element manufacturing, and particularly relates to a zirconium alloy grid laser additive manufacturing method. Determining the parameter ranges of laser power of 200W-300W, laser scanning speed of 900 mm/s-1200 mm/s and laser scanning interval of 0.05-0.15 mm; refining the parameter range: the laser power is 200W-250W, the laser scanning speed is 1000 mm/s-1100 mm/s, the laser scanning interval is 0.08-0.12 mm, and the powder spreading thickness of the zirconium alloy powder is 0.03-0.05 mm; building a three-dimensional model of the framework, wherein the framework is provided with a plurality of hollow structures, and when the length of a suspended part is more than 2mm, the framework cannot be supported by the zirconium alloy powder, so that a support structure is designed; carrying out slicing and subdivision after adding a support structure into the model, wherein subdivision thickness is consistent with powder laying thickness of zirconium alloy powder, and finally carrying out laser material increase manufacturing on a zirconium alloy grid by using determined parameters; and carrying out heat treatment on the grillwork. The invention solves the problems of long development cycle and difficult manufacturing of the grillwork.
Description
Technical Field
The invention belongs to the technical field of nuclear fuel element manufacturing, and particularly relates to a zirconium alloy grid laser additive manufacturing method.
Background
The spacer grid is an important component of the fuel assembly, and is used as the only component in the fuel assembly, which is in contact with the fuel rod, and the structure of the spacer grid not only needs to ensure the positioning of the fuel rod in the reactor core and the structural integrity of the fuel assembly, but also has the functions of improving the thermal performance of the fuel assembly and the like. However, the spacer grid has a complex structure and high requirements on the manufacturing process, if a conventional manufacturing means is used, the grid can be manufactured only by a plurality of complex processes such as stamping, cutting, welding and the like, and the integrated spacer grid meeting the performance requirements can be quickly and precisely manufactured by adopting a laser additive manufacturing technology.
Disclosure of Invention
The invention aims to provide a zirconium alloy grid laser additive manufacturing method, which solves the problems of long research and development period and high difficulty of fuel assembly grid manufacturing, confirms the feasibility of the additive manufacturing technology in grid manufacturing and realizes the application of the laser additive manufacturing technology in the field of nuclear fuel element research and development.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a laser additive manufacturing method of a zirconium alloy framework,
(1) combining the characteristics of zirconium alloy powder materials, carrying out numerical simulation and analysis of a temperature field and a stress field in the additive manufacturing process, and determining the parameter ranges of 200-300W of laser power, 900-1200 mm/s of laser scanning speed and 0.05-0.15 mm of laser scanning distance;
(2) the additive manufacturing process research of the zirconium alloy powder is carried out through an orthogonal test, and the parameter range is refined: the laser power is 200W-250W, the laser scanning speed is 1000 mm/s-1100 mm/s, the laser scanning interval is 0.08-0.12 mm, and the powder spreading thickness of the zirconium alloy powder is 0.03-0.05 mm;
(3) building a three-dimensional model of the framework, wherein the framework is provided with a plurality of hollow structures, and when the length of a suspended part is more than 2mm, the framework cannot be supported by the zirconium alloy powder, so that a support structure is designed;
(4) carrying out slicing and subdivision after adding a support structure into the model, wherein the subdivision thickness is consistent with the powder laying thickness of the zirconium alloy powder, and finally carrying out laser additive manufacturing on the zirconium alloy grillwork by using the parameters determined in the step (2);
(5) and carrying out heat treatment on the grillwork.
In the step (3), the laser forming process parameters of the supporting structure are as follows: the laser power was 100W, the laser scanning pitch was 0.11mm, and the laser scanning speed was 1300 mm/s.
In the step (5), the heat treatment scheme is as follows: solution heat treatment by quenching in water at 520 ℃.
The beneficial effects obtained by the invention are as follows:
the zirconium alloy grid is prepared by using the laser additive manufacturing technology, the process parameters of the laser additive manufacturing of the zirconium alloy grid are determined, the heat treatment process for eliminating residual stress and improving the mechanical property of the zirconium alloy grid is established, the zirconium alloy grid meeting the technical index requirements is finally prepared, and the problems of long development period and difficulty in manufacturing of the grid are solved.
Detailed Description
The present invention will be described in detail with reference to specific examples.
The laser additive manufacturing method of the zirconium alloy grillwork comprises the following steps:
(1) combining the characteristics of zirconium alloy powder materials, carrying out numerical simulation and analysis of a temperature field and a stress field in the additive manufacturing process, and determining the parameter ranges of laser power of 200W-300W, laser scanning speed of 900 mm/s-1200 mm/s and laser scanning interval of 0.05-0.15 mm.
(2) The additive manufacturing process research of the zirconium alloy powder is carried out through an orthogonal test, and the parameter range is refined: the laser power is 200W-250W, the laser scanning speed is 1000 mm/s-1100 mm/s, the laser scanning interval is 0.08-0.12 mm, and the powder spreading thickness of the zirconium alloy powder is 0.03-0.05 mm.
(3) The method is characterized in that three-dimensional modeling software is used for building a three-dimensional model of the framework, the framework is provided with a plurality of hollow structures, and when the length of a suspended part is greater than 2mm, zirconium alloy powder cannot support the framework, so that the framework is prone to forming failure, a supporting structure is designed for the framework, and laser forming technological parameters of the supporting structure are as follows: the laser power was 100W, the laser scanning pitch was 0.11mm, and the laser scanning speed was 1300 mm/s.
(4) And (3) carrying out slicing and subdivision after adding a support structure into the model, wherein the subdivision thickness is consistent with the powder laying thickness of the zirconium alloy powder, and finally carrying out laser additive manufacturing on the zirconium alloy grillwork by using the additive manufacturing process parameters of the zirconium alloy powder determined in the step (2).
(5) Because the framework after laser forming has larger stress and influences the mechanical property of the framework, the framework is subjected to heat treatment process research, and the solution heat treatment process scheme of 520 ℃ water-entering quenching is determined.
Examples
The molding process test shows that the optimal grid laser additive molding process parameters are as follows: the laser scanning speed is 1050mm/s, the scanning distance is 0.10mm, the laser power is 230W, and the powder spreading thickness is 0.04 mm;
determining the parameters of the laser additive forming process of the support part by analyzing the influence rule of each parameter on the laser forming framework as follows: the laser power is 100W, the laser scanning interval is 0.11mm, and the laser scanning speed is 1300 mm/s;
the preparation of the grillwork can be realized through a laser additive molding technology, and the process comprises the working procedures of three-dimensional solid modeling, support establishment, subdivision treatment and laser molding;
the post-treatment of the grillwork after the laser additive molding is determined to be solution heat treatment, so that the internal stress can be eliminated, the grillwork performance can be improved, and the subsequent linear cutting is facilitated.
Claims (3)
1. A zirconium alloy grillwork laser additive manufacturing method is characterized in that:
(1) combining the characteristics of zirconium alloy powder materials, carrying out numerical simulation and analysis of a temperature field and a stress field in the additive manufacturing process, and determining the parameter ranges of 200-300W of laser power, 900-1200 mm/s of laser scanning speed and 0.05-0.15 mm of laser scanning distance;
(2) the additive manufacturing process research of the zirconium alloy powder is carried out through an orthogonal test, and the parameter range is refined: the laser power is 200W-250W, the laser scanning speed is 1000 mm/s-1100 mm/s, the laser scanning interval is 0.08-0.12 mm, and the powder spreading thickness of the zirconium alloy powder is 0.03-0.05 mm;
(3) building a three-dimensional model of the framework, wherein the framework is provided with a plurality of hollow structures, and when the length of a suspended part is more than 2mm, the framework cannot be supported by the zirconium alloy powder, so that a support structure is designed;
(4) carrying out slicing and subdivision after adding a support structure into the model, wherein the subdivision thickness is consistent with the powder laying thickness of the zirconium alloy powder, and finally carrying out laser additive manufacturing on the zirconium alloy grillwork by using the parameters determined in the step (2);
(5) and carrying out heat treatment on the grillwork.
2. The zirconium alloy lattice laser additive manufacturing method according to claim 1, wherein: in the step (3), the laser forming process parameters of the supporting structure are as follows: the laser power was 100W, the laser scanning pitch was 0.11mm, and the laser scanning speed was 1300 mm/s.
3. The zirconium alloy lattice laser additive manufacturing method according to claim 1, wherein: in the step (5), the heat treatment scheme is as follows: solution heat treatment by quenching in water at 520 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911325464.9A CN113000840A (en) | 2019-12-20 | 2019-12-20 | Zirconium alloy framework laser additive manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911325464.9A CN113000840A (en) | 2019-12-20 | 2019-12-20 | Zirconium alloy framework laser additive manufacturing method |
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| CN113000840A true CN113000840A (en) | 2021-06-22 |
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| CN201911325464.9A Pending CN113000840A (en) | 2019-12-20 | 2019-12-20 | Zirconium alloy framework laser additive manufacturing method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104109826A (en) * | 2014-07-25 | 2014-10-22 | 哈尔滨东安发动机（集团）有限公司 | Thermal treatment method of MgYNdZr alloy |
| CN105118535A (en) * | 2015-07-03 | 2015-12-02 | 中科华核电技术研究院有限公司 | Nuclear fuel assembly repair detection control system |
| CN105225714A (en) * | 2015-07-03 | 2016-01-06 | 中科华核电技术研究院有限公司 | Nuclear fuel assembly repairs supervisory system |
| US20160228255A1 (en) * | 2007-08-27 | 2016-08-11 | Connor E Samuelson | Systems and methods for providing prosthetic components |
| CN106003735A (en) * | 2016-07-25 | 2016-10-12 | 成都为帆斯通科技有限公司 | Cooling device of 3D (three-dimensional) printing equipment |
| CN106623927A (en) * | 2016-12-13 | 2017-05-10 | 中核北方核燃料元件有限公司 | Nuclear power fuel assembly tube socket laser additional material forming manufacturing method |
| CN107980163A (en) * | 2017-09-20 | 2018-05-01 | 岭澳核电有限公司 | Grid spacer and fuel assembly |
| US10214833B1 (en) * | 2016-07-22 | 2019-02-26 | National Technology & Engineering Solutions Of Sandia, Llc | Additive manufacturing of crystalline materials |
-
2019
- 2019-12-20 CN CN201911325464.9A patent/CN113000840A/en active Pending
Patent Citations (8)
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| US20160228255A1 (en) * | 2007-08-27 | 2016-08-11 | Connor E Samuelson | Systems and methods for providing prosthetic components |
| CN104109826A (en) * | 2014-07-25 | 2014-10-22 | 哈尔滨东安发动机（集团）有限公司 | Thermal treatment method of MgYNdZr alloy |
| CN105118535A (en) * | 2015-07-03 | 2015-12-02 | 中科华核电技术研究院有限公司 | Nuclear fuel assembly repair detection control system |
| CN105225714A (en) * | 2015-07-03 | 2016-01-06 | 中科华核电技术研究院有限公司 | Nuclear fuel assembly repairs supervisory system |
| US10214833B1 (en) * | 2016-07-22 | 2019-02-26 | National Technology & Engineering Solutions Of Sandia, Llc | Additive manufacturing of crystalline materials |
| CN106003735A (en) * | 2016-07-25 | 2016-10-12 | 成都为帆斯通科技有限公司 | Cooling device of 3D (three-dimensional) printing equipment |
| CN106623927A (en) * | 2016-12-13 | 2017-05-10 | 中核北方核燃料元件有限公司 | Nuclear power fuel assembly tube socket laser additional material forming manufacturing method |
| CN107980163A (en) * | 2017-09-20 | 2018-05-01 | 岭澳核电有限公司 | Grid spacer and fuel assembly |
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Application publication date: 20210622 |