CN115308000B - Sample for quantitative characterization of casting hole defect evolution and preparation method thereof - Google Patents
Sample for quantitative characterization of casting hole defect evolution and preparation method thereof Download PDFInfo
- Publication number
- CN115308000B CN115308000B CN202211040270.6A CN202211040270A CN115308000B CN 115308000 B CN115308000 B CN 115308000B CN 202211040270 A CN202211040270 A CN 202211040270A CN 115308000 B CN115308000 B CN 115308000B
- Authority
- CN
- China
- Prior art keywords
- sample
- hole
- evolution
- chamfer
- processing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005266 casting Methods 0.000 title claims abstract description 25
- 230000007547 defect Effects 0.000 title claims abstract description 22
- 238000012512 characterization method Methods 0.000 title claims description 13
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000003754 machining Methods 0.000 claims abstract description 9
- 238000003466 welding Methods 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 230000001788 irregular Effects 0.000 abstract 1
- 238000001513 hot isostatic pressing Methods 0.000 description 4
- 238000005242 forging Methods 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- 238000007514 turning Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
Landscapes
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a sample for quantitatively characterizing the evolution of hole defects of castings and a preparation method thereof, wherein X-ray films are shot on castings, compact parts are selected for linear cutting, and an upper part and a lower part with the same cross section are obtained; processing a downward convex boss on the section of the upper part of the sample, and processing an upper chamfer on the periphery of an annular step surface above the boss; machining a concave table which is concave downwards on the section of the lower part of the sample, and machining a lower chamfer on the periphery of an annular step surface of the top surface of the concave table to obtain a required initial shape; processing a required hole at the bottom of a concave table at the lower part of the sample; and matching the upper part with the lower part, chamfering the matching surface and the lower chamfer to form a circle of annular V-shaped groove, and welding the V-shaped groove to obtain a final sample. The sample prepared by the method can be used for quantitatively representing the hole evolution process in the subsequent processing of castings, and can overcome the problems of high representing difficulty, poor repeatability and the like caused by irregular and non-uniform initial hole morphology.
Description
Technical Field
The invention belongs to the technical field of quantitative characterization of shrinkage cavities of castings, and particularly relates to a sample for quantitative characterization of evolution of defects of holes of castings and a preparation method thereof.
Background
Unavoidable hole defects in the casting can cause the reduction of the effective bearing area of the casting and the rapid reduction of mechanical properties, and the evolution of the defects in subsequent processing (such as forging, hot isostatic pressing and the like) and the final state of the defects seriously influence the usability of parts. The evolution behavior rule of the characterization hole defect in subsequent processing is extremely important for quality control of parts. However, on one hand, the shape of the hole defect naturally formed in the casting is extremely complex, the difficulty in characterization and rule summarization of the evolution process is high, and the universality is poor. On the other hand, the shape of the naturally formed hole defects is different and uncontrollable, and the repeatability of experimental research is extremely poor.
Disclosure of Invention
The invention aims to provide a sample design method for quantitatively characterizing the evolution of a casting hole defect, and a sample prepared according to the method can be used for quantitatively characterizing the evolution process of the hole, summarizing the evolution rule of the hole and checking a mathematical model of the hole evolution by using the sample.
In order to achieve the above object, the present invention provides the following technical solutions:
a sample for quantitatively characterizing the evolution of a casting hole defect, a preparation method thereof comprises the following steps:
Shooting X-ray films on castings, and selecting compact parts for linear cutting to obtain an upper part and a lower part with the same cross section;
Step two, processing a downward convex boss on the section of the upper part of the sample, and processing an upper chamfer on the periphery of an annular step surface above the boss; machining a concave table which is concave downwards on the section of the lower part of the sample, and machining a lower chamfer on the periphery of an annular step surface of the top surface of the concave table to obtain a required initial shape;
Step three, processing a required hole at the bottom of a concave table at the lower part of the sample;
And fourthly, matching the upper part with the lower part, chamfering the matching surface and the lower chamfer to form a circle of annular V-shaped groove, and welding the V-shaped groove to obtain a final sample.
The positions of the holes are adjusted by controlling the heights of the boss and the concave table. The geometric center of the hole and the geometric center of the sample are positioned on the same straight line.
The holes are sealed by the matching of the convex table and the concave table and the welding of the V-shaped groove.
Compared with the prior art, the invention has the following beneficial effects:
The invention provides a sample for quantitatively characterizing the evolution of a casting hole defect and a preparation method thereof, which can be used for researching the evolution of the hole in the machining processes of forging and the like, and is more suitable for quantitatively characterizing the evolution of the hole in the hot isostatic pressing process.
The invention provides a sample for quantitatively representing the evolution of a casting hole defect and a preparation method thereof, wherein the sample with the same internal initial hole is obtained by processing the samples in batches, the repeatability is good, and the sample can be used for exploring the influence of different processes on the evolution behavior of the hole, so that the process optimization is realized.
The invention provides a sample for quantitatively representing the evolution of a casting hole defect and a preparation method thereof, which can freely design internal holes with different positions and different shapes and verify a hole evolution mathematical model. And because the hole morphology is regular and the hole positions are known, the closed position of the hole can be accurately positioned after the processing treatment, and the sample is intercepted for microstructure characterization.
Drawings
FIG. 1 is a schematic diagram of the upper part of a sample according to the present invention;
FIG. 2 is a schematic view of the cross-sectional structure of the lower part of the sample according to the present invention;
FIG. 3 is a schematic flow chart of the preparation method of the invention;
Fig. 4 is a quantitative characterization of the sample of the example applied to the holes of the hot isostatic pressing process.
In the figure: 1-boss, 2-upper chamfer, 3-lower chamfer, 4-concave table and 5-hole.
Detailed Description
The invention will be further described with reference to the drawings and detailed description.
Referring to fig. 1-2, the present embodiment provides a method for preparing a sample for quantitative characterization of the evolution of casting hole defects, the sample comprising an upper portion and a lower portion, wherein: the boss 1 at the upper part is matched with the concave table 4 at the lower part, and the upper part and the lower part are connected through welding to obtain a sample with a closed hole 5 inside. The geometric center of the hole 5 is on the same line as the geometric center of the sample.
The preparation process flow of the embodiment is as follows: x-ray film, linear cutting, turning, milling, drilling and welding, as shown in fig. 3, the specific steps are as follows:
shooting an X-ray film on a casting, and selecting a compact material part to process the initial outline of an upper part and a lower part through a wire cut electric discharge machine, wherein the upper part of the sample has a size phi 15 mm to 5mm, and the lower part of the sample has a size phi 15 mm to 10mm;
Turning the upper part and the lower part, machining a downward convex boss 1 on the section of the upper part of the sample, and machining an upper chamfer 2 on the periphery of an annular step surface above the boss 1; processing a concave table 4 which is concave downwards on the section of the lower part of the sample, and processing a lower chamfer 3 on the periphery of the annular step surface of the top surface of the concave table 4 to obtain a required initial shape;
step three, processing a hole 5 in the center of the concave table 4, wherein the diameter of the hole 5 is 1.5mm;
And fourthly, matching the upper part and the lower part together, forming a circle of annular V-shaped groove by the chamfer 2 and the lower chamfer 3 on the matching surface, welding the V-shaped groove, and sealing the inner holes to obtain a sample for quantitatively characterizing the defect evolution of the casting holes.
Referring to fig. 3, by calculating the cross-sectional area of the cylindrical holes 5, multiplied by the height of the holes 5, porosities of 0.305%, 0.0046%, 0.0008% and 0.0002%, respectively, can be obtained. Experimental results show that the sample design method provided by the embodiment can be effectively applied to quantitative characterization of the evolution of the defects of the internal holes of the castings in the hot isostatic pressing process, and lays a foundation for summarizing the evolution rules of the defects of the internal holes of the castings.
The present invention is not limited to the above embodiments, and various changes may be made in the shape, size, shape and size of the hole, and the manner of processing without departing from the object and scope of application of the present invention.
Claims (3)
1. A sample design method for quantitative characterization of the evolution of casting hole defects is characterized by comprising the following specific steps:
shooting an X-ray film on a casting, and selecting a part with compact materials for linear cutting to obtain an upper part and a lower part with the same section;
Step two, processing a downward convex boss (1) on the section of the upper part of the sample, and processing an upper chamfer (2) on the periphery of an annular step surface above the boss (1); machining a concave table (4) which is concave downwards on the section of the lower part of the sample, and machining a lower chamfer (3) on the outer periphery of an annular step surface of the top surface of the concave table (4) to obtain a required initial shape;
step three, processing a hole (5) required at the bottom of the concave table (2) at the lower part of the sample; the positions of the holes (5) are adjusted by controlling the heights of the boss (1) and the concave table (4); the geometric center of the hole (5) and the geometric center of the sample are positioned on the same straight line;
And fourthly, matching the upper part with the lower part, forming a circle of annular V-shaped groove on the matching surface by the chamfer (2) and the lower chamfer (3), and welding the V-shaped groove to obtain a final sample.
2. A sample design method for quantitative characterization of the evolution of hole defects in castings according to claim 1, characterized in that the closing of the holes (5) is achieved by the cooperation of the bosses (1) and the recesses (4) and the welding of the V-grooves.
3. A sample for quantitative characterization of the evolution of casting hole defects, obtained by the design method of claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211040270.6A CN115308000B (en) | 2022-08-29 | 2022-08-29 | Sample for quantitative characterization of casting hole defect evolution and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211040270.6A CN115308000B (en) | 2022-08-29 | 2022-08-29 | Sample for quantitative characterization of casting hole defect evolution and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115308000A CN115308000A (en) | 2022-11-08 |
| CN115308000B true CN115308000B (en) | 2024-05-17 |
Family
ID=83865319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211040270.6A Active CN115308000B (en) | 2022-08-29 | 2022-08-29 | Sample for quantitative characterization of casting hole defect evolution and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115308000B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006038625A (en) * | 2004-07-27 | 2006-02-09 | Toyota Motor Corp | Blow hole measuring method |
| CN102654439A (en) * | 2011-03-02 | 2012-09-05 | 中国科学院金属研究所 | Method for evaluating welding degree of hole type defect in forge piece |
| CN105548207A (en) * | 2016-02-02 | 2016-05-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Quantitative determination method of central porosity or shrinkage of continuously cast slab |
| CN106093211A (en) * | 2016-06-02 | 2016-11-09 | 华中科技大学 | The glue-line adhesive bonding of composites fault of construction test block manufacture method containing air hole |
| CN208847513U (en) * | 2018-09-30 | 2019-05-10 | 苏州安路特汽车部件有限公司 | A kind of cutting element for aluminium casting sampling |
| CN111830131A (en) * | 2020-07-01 | 2020-10-27 | 张家港荣盛特钢有限公司 | Quantitative method for central looseness or shrinkage cavity of casting blank |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9652566B2 (en) * | 2013-08-13 | 2017-05-16 | Gm Global Technology Operations, Llc | Methods for simulating oxides in aluminum castings |
-
2022
- 2022-08-29 CN CN202211040270.6A patent/CN115308000B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006038625A (en) * | 2004-07-27 | 2006-02-09 | Toyota Motor Corp | Blow hole measuring method |
| CN102654439A (en) * | 2011-03-02 | 2012-09-05 | 中国科学院金属研究所 | Method for evaluating welding degree of hole type defect in forge piece |
| CN105548207A (en) * | 2016-02-02 | 2016-05-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Quantitative determination method of central porosity or shrinkage of continuously cast slab |
| CN106093211A (en) * | 2016-06-02 | 2016-11-09 | 华中科技大学 | The glue-line adhesive bonding of composites fault of construction test block manufacture method containing air hole |
| CN208847513U (en) * | 2018-09-30 | 2019-05-10 | 苏州安路特汽车部件有限公司 | A kind of cutting element for aluminium casting sampling |
| CN111830131A (en) * | 2020-07-01 | 2020-10-27 | 张家港荣盛特钢有限公司 | Quantitative method for central looseness or shrinkage cavity of casting blank |
Non-Patent Citations (3)
| Title |
|---|
| Effects of heat treatments on microstructures of TiAl alloys;Yu Wen 等;INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS;20220630;第29卷(第06期);第1225-1230页 * |
| GCr15铸环热辗扩孔洞形状演变预测模型研究;钱东升 等;塑性工程学报;20170228;第24卷(第01期);第168-173页 * |
| 钢锭内部孔隙性缺陷锻合过程的数值模拟;陈锟 等;塑性工程学报;20100228;第17卷(第01期);第6-10页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115308000A (en) | 2022-11-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB2594182A (en) | Machining process for large-diameter thin-walled part | |
| CN109570920B (en) | Machining method for base body of wave-lobe diffuser | |
| CN108161507A (en) | A kind of large size, thin walled cylinder part bulging tooling and clamping method | |
| CN111421216B (en) | Method for optimizing induction welding heating of welded pipe | |
| CN108339886B (en) | A kind of hydraulically operated fixture and its sheet forming feed process based on progressive molding lathe | |
| CN114210999B (en) | Integral manufacturing method of multilayer thin-wall streamline structure valve shell | |
| CN115308000B (en) | Sample for quantitative characterization of casting hole defect evolution and preparation method thereof | |
| CN112122438A (en) | Thin-wall sheet metal part liquid filling forming die and method | |
| CN110773685B (en) | Preparation method of thick and large variable-section Ti-6242 alloy blisk forging | |
| CN112059091A (en) | Disc type aluminum alloy automobile hub forging die structure and forging method | |
| CN111283385B (en) | Ultra-precise die machining method and ultra-precise die | |
| CN105619036A (en) | Axial flow pump blade machining method | |
| CN107096890B (en) | Superplastic forming/diffusion bonding forming die for split casting of equal-thickness molded surface and preparation method thereof | |
| CN101380711B (en) | Processing method of bead-fixing ring of vortex type automobile air conditioner compressor | |
| CN206544034U (en) | Process the Special mould of Ω ring seal washers | |
| CN116422885A (en) | Internal control type part hot isostatic pressing forming die and forming method thereof | |
| CN114029358B (en) | Manufacturing method of titanium alloy thin-wall cylinder | |
| CN114939675A (en) | Selective laser melting forming method of integrated air-permeable mold | |
| CN112642947B (en) | Hot-pressing bulging tool and method for hot-pressing bulging thin-wall cylindrical part with necking structure | |
| CN114289918A (en) | Large-scale super-long titanium alloy special-shaped thin shell precision casting and processing and welding deformation control technology | |
| CN113941879A (en) | Enclosed inner cavity structure shell clamping device and machining method thereof | |
| CN112548119A (en) | Method for regulating and controlling selective laser melting forming titanium alloy process based on defect form | |
| CN207205183U (en) | The superplastic forming of the thicker face split casting such as a kind of/diffusion joint forming mould | |
| CN112191847A (en) | Steel sample sintering forming method for artificially implanting inclusions | |
| CN208745260U (en) | A kind of high-precision injection molding mold |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |