CN114713843A - Forming method of 304L stainless steel component with strong helium brittleness resistance - Google Patents
Forming method of 304L stainless steel component with strong helium brittleness resistance Download PDFInfo
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- CN114713843A CN114713843A CN202210334246.7A CN202210334246A CN114713843A CN 114713843 A CN114713843 A CN 114713843A CN 202210334246 A CN202210334246 A CN 202210334246A CN 114713843 A CN114713843 A CN 114713843A
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 46
- 239000001307 helium Substances 0.000 title claims abstract description 46
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 239000010964 304L stainless steel Substances 0.000 title claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 65
- 239000010935 stainless steel Substances 0.000 claims abstract description 25
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 25
- HDSUFZKBUUJDGC-MMVKSQEVSA-N (1r,6s,8s,8as)-6-amino-6-benzyl-n-[(4-carbamimidoylphenyl)methyl]-1-ethyl-8-methoxy-5-oxo-1,2,3,7,8,8a-hexahydroindolizine-3-carboxamide;hydrochloride Chemical compound Cl.C([C@@]1(C[C@@H]([C@H]2N(C1=O)C(C[C@H]2CC)C(=O)NCC=1C=CC(=CC=1)C(N)=N)OC)N)C1=CC=CC=C1 HDSUFZKBUUJDGC-MMVKSQEVSA-N 0.000 claims abstract description 14
- 239000011812 mixed powder Substances 0.000 claims abstract description 12
- 230000008021 deposition Effects 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 18
- 238000005516 engineering process Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010146 3D printing Methods 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 210000003850 cellular structure Anatomy 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
-
- 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
- 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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
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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)
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- Manufacturing & Machinery (AREA)
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- Physics & Mathematics (AREA)
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Abstract
The invention provides a method for forming a 304L stainless steel component with strong helium brittleness resistance, which comprises the following steps: SiC powder, SiN powder and Y powder are deposited by a multi-channel powder bed laser deposition forming method2O3Directly and synchronously codepositing mixed powder obtained by premixing the powder and 304L stainless steel powder to obtain a stainless steel component, wherein the stainless steel component has C, N and nanometer Y2O3Uniformly distributed sub-nano step microstructure characteristics. The stainless steel component formed by the method has strong helium brittleness resistance, and compared with the stainless steel component manufactured by the traditional method, the helium brittleness resistance can be improved by 30-80%.
Description
Technical Field
The invention belongs to the field of nuclear power, and particularly relates to a method for forming a 304L stainless steel component with strong helium brittleness resistance.
Background
3D printing is a manufacturing technology that uses laser or electron beam and other means to add and pile up materials layer by layer under computer control to directly and rapidly form parts according to three-dimensional modeling, also called additive manufacturing. The additive manufacturing technology does not need traditional tools, clamps and multiple processing procedures, parts with any complex shapes can be rapidly and accurately manufactured on one device by utilizing three-dimensional design data, compared with the traditional processing of material removal (or deformation) and the common special processing technology, the additive manufacturing technology has excellent material utilization rate, and laser direct deposition (DLD) is taken as a rapid additive manufacturing technology and is mainly applied to the fields of direct forming, surface coating, remanufacture repair and the like. The technology has the outstanding advantages of high stability, no need of vacuum environment, moderate cost, convenience for coaxial online monitoring and the like, thereby being widely applied. Compared with the traditional welding method, the DLD technology has the advantages of centralized heat source, reliable deposition quality, small heat input, small influence on the matrix parent metal in the forming process, and gradually expanded application to high-performance precise connection of functional components in recent years. However, in the prior art, the resistance to helium brittleness of a 304L stainless steel component obtained by traditional 3D printing is poor.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a method for forming a 304L stainless steel member having high resistance to helium brittleness.
The invention provides a method for forming a 304L stainless steel component with strong helium brittleness resistance, which is characterized by comprising the following steps: SiC powder, SiN powder and Y powder are deposited by a multi-channel powder bed laser deposition forming method2O3Directly and synchronously codepositing mixed powder obtained by premixing the powder and 304L stainless steel powder to obtain a stainless steel component, wherein the stainless steel component has C, N and nanometer Y2O3Uniformly distributed sub-nano step microstructure characteristics.
The forming method of the strong helium brittleness resistant 304L stainless steel component provided by the invention can also have the following characteristics: in the multi-channel powder bed laser deposition forming method, 2 or more channels are provided for conveying powder, and in the synchronous codeposition process, mixed powder and 304L stainless steel powder are synchronously sent out through different channels.
The forming method of the strong helium brittleness resistant 304L stainless steel component provided by the invention can also have the following characteristics: wherein the granularity of 304L stainless steel powder is 80-150 μm, and the size is in Gaussian distribution.
The forming method of the strong helium brittleness resistant 304L stainless steel component provided by the invention can also have the following characteristics: wherein the grain size of the SiC powder is 13 μm, and the grain size of the SiN powder is 30 nm.
The forming method of the strong helium brittleness resistance 304L stainless steel component provided by the invention can also have the following characteristics: wherein Y is2O3The particle size of the powder was 25 nm.
The forming method of the strong helium brittleness resistant 304L stainless steel component provided by the invention can also have the following characteristics: wherein, SiC powder, SiN powder and Y2O3The premixing method of the powder comprises the steps of mechanically premixing, performing ultrasonic dispersion, and mixing SiC powder, SiN powder and Y2O3The mass ratio of the powder is 40: 10: 3.
the forming method of the strong helium brittleness resistant 304L stainless steel component provided by the invention can also have the following characteristics: wherein, when synchronous codeposition is carried out, the technological parameters are as follows: the laser power was 600W, the supply rate of 304L stainless steel powder was 500mm/min, and the supply rate of mixed powder was 500 mm/min.
Action and effects of the invention
According to the forming method of the strong helium brittleness resistance 304L stainless steel component, SiC powder, SiN powder and Y powder are subjected to a multi-channel powder bed laser deposition forming method2O3Directly and synchronously codepositing mixed powder obtained by premixing the powder and 304L stainless steel powder to obtain a stainless steel component, wherein the stainless steel component has C, N and nano Y2O3The uniformly distributed sub-nano step microstructure is characterized in that the structure can be used as defect sink, the nucleation and growth of helium bubbles can be effectively inhibited, and the harmful effect of helium agglomeration is reduced to the minimum. By the inventionThe formed stainless steel component has strong helium brittleness resistance, and compared with the stainless steel component manufactured by the traditional method, the helium brittleness resistance can be improved by 30-80%.
Drawings
FIG. 1 is a microstructure of a stainless steel member having strong helium brittleness resistance prepared in an example of the present invention;
fig. 2 is a microstructure diagram of a conventionally prepared 304L stainless steel in comparative example 1 of the present invention.
Detailed Description
In order to make the technical means and functions of the present invention easy to understand, the present invention is specifically described below with reference to the embodiments and the accompanying drawings.
< example >
The method for forming the 304L stainless steel component with strong helium brittleness resistance comprises the following steps:
using TruLaser Cell7040 forming equipment to form SiC powder, SiN powder and Y powder by multi-channel powder bed laser deposition2O3And directly and synchronously codepositing the mixed powder obtained after the powder is premixed with 304L stainless steel powder to obtain the stainless steel component. The process parameters when performing the simultaneous codeposition are as follows: the laser power is 600W, the supply rate of 304L stainless steel powder is 500mm/min, the supply rate of mixed powder is 500mm/min, the layer thickness is 0.7mm, the included angle of the groove is 60 degrees, and the gap of the groove group pair is not more than 0.2 mm.
Wherein the SiC powder content is 4 wt%, the SiN powder content is 1 wt%, and Y2O3The powder content is 0.3 wt%, and other parameters of the powder are the same as those of the conventional powder in the market.
The obtained stainless steel component has C, N and nanometer Y2O3The uniformly distributed sub-nano step microstructure is characterized in that C, N is distributed at the positions of sub-grain boundaries and grain boundaries of micron cellular structures and nano Y2O3Distributed in the crystal boundary to form a unique micro-nano scale stepped structure.
In this embodiment, the process parameters may be optimized based on different manufacturers or models of equipment, and DLD forming is performed within the laser power range.
FIG. 1 is a microstructure diagram of a stainless steel member having strong helium brittleness resistance prepared in an example of the present invention.
As shown in figure 1, the stainless steel component with strong helium brittleness resistance can be prepared by the forming method of the 304L stainless steel component with strong helium brittleness resistance, and the helium brittleness resistance of the component is improved by 50% compared with that of the component made of the same material by a traditional casting method.
< comparative example 1>
In the preparation method of comparative example 1, no SiC powder and SiN powder were added during premixing, and the remaining steps were the same as in the examples.
FIG. 2 is a microstructure diagram of a 304L stainless steel conventionally manufactured in comparative example 1 of the present invention.
As shown in FIG. 2, the structure of the member obtained in comparative example 1 had coarse crystal grains, and the member had a helium brittleness resistance of only 20%.
< comparative example 2>
In the preparation method of comparative example 2, Y was not added at the time of premixing2O3Powder lot, the rest steps are the same as the examples.
The structure of the member obtained in comparative example 2 had coarse inclusions, and the helium brittleness resistance of the member was only 20%.
< comparative example 3>
In the preparation method of the present comparative example 3, the content of SiC powder was 2 wt%, the content of SiN powder was 0.2 wt%, and Y was2O3The content is 0.1 wt%, and the remaining steps are the same as in example.
The component obtained in comparative example 3 had a helium embrittlement resistance of only 25%.
< comparative example 4>
The preparation method of comparative example 4 does not use the multi-pass powder bed laser deposition forming method, and the rest steps are the same as the examples.
The structure of the member obtained in comparative example 4 had coarse crystal grains, and contained no C, N and no nano Y2O3The uniform sub-nano step microstructure is characterized by poor helium brittleness resistance.
< comparative example 5>
In the preparation method of the comparative example 5, when the synchronous codeposition is performed, the process parameters are not adopted, wherein the laser power is 600W, the supply rate of 304L stainless steel powder is 500mm/min, the supply rate of mixed powder is 500mm/min, the layer thickness is 0.7mm, the included angle of the groove is 60 degrees, and the gap of the groove pair is not more than 0.2 mm. The rest steps are the same as the embodiment.
The component obtained in comparative example 5 had a helium brittleness resistance of only 25%.
According to comparative analysis of the stainless steel members prepared in examples and comparative examples 1 to 5, only the stainless steel member obtained by the method for forming a 304L stainless steel member having strong resistance to helium brittleness according to the present invention has high resistance to helium brittleness. The stainless steel component prepared by the invention has C, N and nanometer Y2O3The uniformly distributed sub-nano step microstructure is characterized in that C, N is distributed at the positions of sub-grain boundaries and grain boundaries of micron cellular structures and nano Y2O3Distributed in the crystal boundary to form a unique micro-nano scale stepped structure. Compared with the stainless steel component manufactured by the traditional method, the helium brittleness resistance can be improved by 30-80%.
Effects and effects of the embodiments
According to the forming method of the strong helium brittleness resistance 304L stainless steel component related by the embodiment, SiC powder, SiN powder and Y powder are subjected to a multi-channel powder bed laser deposition forming method2O3Directly and synchronously codepositing mixed powder obtained by premixing the powder and 304L stainless steel powder to obtain a stainless steel component, wherein the stainless steel component has C, N and nano Y2O3The uniformly distributed sub-nano step microstructure is characterized in that the structure can be used as defect sink, the nucleation and growth of helium bubbles can be effectively inhibited, and the harmful effect of helium agglomeration is reduced to the minimum. The stainless steel member formed by the embodiment has strong helium brittleness resistance, and compared with the stainless steel member manufactured by the traditional method, the helium brittleness resistance can be improved by 30-80%.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (7)
1. A method for forming a 304L stainless steel component with strong helium brittleness resistance is characterized by comprising the following stepsThe method comprises the following steps: SiC powder, SiN powder and Y powder are deposited by a multi-channel powder bed laser deposition forming method2O3Directly and synchronously codepositing mixed powder obtained after the powder is premixed with 304L stainless steel powder to obtain a stainless steel component,
wherein the stainless steel component has C, N and nanometer Y2O3Uniformly distributed sub-nano step microstructure characteristics.
2. The method of forming a strong helium embrittlement resistant 304L stainless steel member according to claim 1, wherein:
in the multi-channel powder bed laser deposition forming method, 2 or more channels are arranged during powder conveying, and the mixed powder and the 304L stainless steel powder are synchronously sent out through different channels in the synchronous codeposition process.
3. The method of forming a strong helium embrittlement resistant 304L stainless steel member according to claim 1, wherein:
wherein the particle size of the 304L stainless steel powder is 80-150 μm, and the size is in Gaussian distribution.
4. The method of forming a strong helium embrittlement resistant 304L stainless steel member according to claim 1, wherein:
wherein the granularity of the SiC powder is 13 mu m, and the granularity of the SiN powder is 30 nm.
5. The method of forming a strong helium embrittlement resistant 304L stainless steel member according to claim 1, wherein:
wherein, the Y is2O3The particle size of the powder was 25 nm.
6. The method of forming a strong helium embrittlement resistant 304L stainless steel member according to claim 1, wherein:
wherein the SiC powder, the SiN powder and the Y powder2O3The premixing method of the powder is that ultrasonic wave is carried out after mechanical premixingDispersing the SiC powder, the SiN powder and the Y powder2O3The mass ratio of the powder is 40: 10: 3.
7. the method of forming a strong helium embrittlement resistant 304L stainless steel member according to claim 1, wherein:
wherein, when the synchronous codeposition is carried out, the technological parameters are as follows: the laser power was 600W, the supply rate of the 304L stainless steel powder was 500mm/min, and the supply rate of the mixed powder was 500 mm/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210334246.7A CN114713843B (en) | 2022-03-31 | 2022-03-31 | Forming method of high helium brittleness resistant 304L stainless steel member |
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| CN202210334246.7A CN114713843B (en) | 2022-03-31 | 2022-03-31 | Forming method of high helium brittleness resistant 304L stainless steel member |
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| CN114713843B CN114713843B (en) | 2023-04-25 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4818485A (en) * | 1987-02-11 | 1989-04-04 | The United States Of America As Represented By The United States Department Of Energy | Radiation resistant austenitic stainless steel alloys |
| US6391251B1 (en) * | 1999-07-07 | 2002-05-21 | Optomec Design Company | Forming structures from CAD solid models |
| CN1411942A (en) * | 2002-03-21 | 2003-04-23 | 西北工业大学 | Component and tissue controllable laser stereoforming method |
| CN102994884A (en) * | 2012-12-03 | 2013-03-27 | 东北大学 | Efficient preparation method for nanostructure oxide dispersion strengthening steel |
| CN105772723A (en) * | 2016-04-18 | 2016-07-20 | 西安智熔金属打印系统有限公司 | Rapid prototyping system and method of gradient material structure |
| CN105803454A (en) * | 2016-05-10 | 2016-07-27 | 贵州大学 | Composite coating material based on 45# steel substrate and preparing method of coating |
| CN106563804A (en) * | 2016-10-12 | 2017-04-19 | 机械科学研究总院先进制造技术研究中心 | Laser-targeting multi-metal fused deposition additive manufacturing process and device |
| CN113319270A (en) * | 2021-04-28 | 2021-08-31 | 广州鑫研锦增材科技有限公司 | Additive manufacturing oriented particle reinforced 17-4PH material and forming method thereof |
-
2022
- 2022-03-31 CN CN202210334246.7A patent/CN114713843B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4818485A (en) * | 1987-02-11 | 1989-04-04 | The United States Of America As Represented By The United States Department Of Energy | Radiation resistant austenitic stainless steel alloys |
| US6391251B1 (en) * | 1999-07-07 | 2002-05-21 | Optomec Design Company | Forming structures from CAD solid models |
| CN1411942A (en) * | 2002-03-21 | 2003-04-23 | 西北工业大学 | Component and tissue controllable laser stereoforming method |
| CN102994884A (en) * | 2012-12-03 | 2013-03-27 | 东北大学 | Efficient preparation method for nanostructure oxide dispersion strengthening steel |
| CN105772723A (en) * | 2016-04-18 | 2016-07-20 | 西安智熔金属打印系统有限公司 | Rapid prototyping system and method of gradient material structure |
| CN105803454A (en) * | 2016-05-10 | 2016-07-27 | 贵州大学 | Composite coating material based on 45# steel substrate and preparing method of coating |
| CN106563804A (en) * | 2016-10-12 | 2017-04-19 | 机械科学研究总院先进制造技术研究中心 | Laser-targeting multi-metal fused deposition additive manufacturing process and device |
| CN113319270A (en) * | 2021-04-28 | 2021-08-31 | 广州鑫研锦增材科技有限公司 | Additive manufacturing oriented particle reinforced 17-4PH material and forming method thereof |
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