Metal hot crack sensitivity detection device
By setting up ring irons and chills in the metal casting device, thermal stress generated by temperature difference is used to detect metal ring cracks. This solves the problem that existing technologies cannot accurately detect the sensitivity of molten metal to hot cracking, and achieves rapid and accurate hot cracking prediction, thereby improving the quality of metal casting.
Patent Information
- Application Number
- CN202320804501.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-04-12
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2033-04-12
AI Technical Summary
The lack of existing technology for accurately detecting the susceptibility of molten metal to hot cracking makes it impossible to effectively predict and avoid hot cracking defects during the metal casting process.
A metal hot cracking sensitivity detection device was designed. By setting up a ring iron and a chill iron in the casting cavity, thermal stress is generated by the temperature difference. The device detects whether cracks appear in the metal ring under different sizes, and then evaluates the hot cracking sensitivity of the molten metal.
It enables rapid and accurate detection of the susceptibility of molten metal to hot cracking, and can predict the size of the first crack to appear in a metal ring under different sizes, representing its hot cracking tendency, thus improving the quality control of metal casting.
Smart Images
Figure CN223883499U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of metal casting, in particular to a metal hot crack sensitivity detection device. BACKGROUND
[0002] Crack sensitivity refers to the sensitivity degree of metal material producing cracks in the casting process, and according to the type of crack, it can be generally divided into hot crack sensitivity and cold crack sensitivity.
[0003] At present, it is generally believed that hot crack is caused by very complex thermal stress and solidification phenomenon, and this solidification defect is often accompanied by incomplete feeding and tensile stress generated in the related area of the paste zone, especially in the area with relatively high solid phase rate, and this phenomenon represents an irreversible defect of metal material in the semi-solid state, and in some studies, it is believed that hot crack is caused by the failure of liquid metal to feed in time during the solidification shrinkage process under the condition of thermal stress.
[0004] Since hot crack is a defective problem in the metal casting process, it is necessary to detect the hot crack tendency of the metal liquid before casting, that is, to detect the hot crack sensitivity of the metal liquid, and there is no mature device in the prior art that can accurately detect the hot crack sensitivity of the metal liquid, so it is necessary to develop a device for detecting the hot crack sensitivity of the metal liquid. INVENTION CONTENTS
[0005] To solve the above problems, that is, the lack of metal liquid metal hot crack sensitivity detection device in the prior art, the utility model provides a metal hot crack sensitivity detection device, which comprises a mold box, a disc-shaped casting cavity is arranged in the mold box, the casting cavity is communicated with a direct sprue, a ring iron is arranged in the casting cavity, the ring iron is arranged concentrically with the casting cavity, the width of the ring iron is the same as the width of the casting cavity, and the diameter of the ring iron is smaller than the diameter of the casting cavity; a cold iron is arranged at the bottom of the casting cavity, and the upper surface of the cold iron is arranged at the same height as the bottom surface of the casting cavity.
[0006] By adopting the above technical scheme, the ring iron and the casting cavity are separated into a ring structure, so that a metal ring can be cast, and the size of the metal ring can be adjusted by changing the size of the ring iron. The cold iron arranged at the bottom of the casting cavity can form a hot crack at the position of the cold iron after the alloy solidifies. According to the properties of the metal liquid, the size of the ring iron is gradually increased for casting experiment, and when the first crack appears, the size of the metal ring represents the hot crack tendency of the metal, that is, the hot crack sensitivity of the metal, and the purpose of detecting the hot crack sensitivity of the metal liquid is achieved.
[0007] The utility model discloses a further setting be: two be provided with the casting cavity, two the casting cavity about the direct sprue symmetrical setting, the bottom end of direct sprue is connected with the inner runner, and two ends of inner runner are communicated with two casting cavities respectively.
[0008] By adopting the above technical scheme, the metal liquid is injected into one direct sprue, the casting work can be carried out to two casting cavities simultaneously, and then the two sizes can be cast simultaneously to speed up the detection speed.
[0009] The utility model discloses a further setting be: the chills are set as sector, and four chills are arranged in each casting cavity, and the four chills are evenly arranged along the circumference of the casting cavity.
[0010] By adopting the above technical scheme, the chills are arranged to generate a certain temperature difference in the casting cavity, and the thermal stress will be generated under the action of the temperature difference, that is, when the crack appears on the cast metal ring, the crack will first appear at the position of the corresponding chill, and the position of the crack on the metal ring can be found more conveniently in the later period.
[0011] The utility model discloses the beneficial effects are:
[0012] Through the cooperation of the casting cavity and the ring iron, the metal ring can be cast, the size of the ring iron can be gradually changed, the size of the cast metal ring can also be changed, and the size of the first metal ring with the crack can represent the thermal cracking tendency of the metal, and the detection purpose of the thermal cracking sensitivity of the metal liquid can be realized. DRAWINGS
[0013] Figure 1 The structure schematic diagram of the utility model is shown.
[0014] Figure 2 The structure schematic diagram after the ring iron is removed is shown.
[0015] Figure 3 The sectional view of the utility model front is shown.
[0016] Figure 4 The structure schematic diagram of the chill is shown.
[0017] Figure 5 The structure schematic diagram of the ring iron is shown.
[0018] Signs: 1, model box;11, casting cavity;111, ring iron;112, chill;12, direct sprue;13, inner runner;14, box cover. CONCRETE IMPLEMENTATION
[0019] The preferred embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art will understand that the embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application.
[0020] The utility model provides a kind of metal hot crack sensitivity detection device, including rectangular model box 1, sand is modeled with disc type pouring cavity 11 in model box 1, and box cover 14 is connected with model box 1 cooperation. Pouring cavity 11 is provided with two, and two pouring cavities 11 are commonly communicated with a straight runner 12, and the straight runner 12 is perpendicular to pouring cavity 11, and the end of the straight runner 12 away from pouring cavity 11 extends out box cover 14 to be set, to pour metal liquid into pouring cavity 11 by straight runner 12.
[0021] Two pouring cavities 11 are symmetrically arranged about the straight runner 12, and the lower end of the straight runner 12 is connected to the inner runner 13, which is perpendicular to the straight runner 12. The two ends of the inner runner 13 are respectively connected to the two pouring cavities 11. When pouring metal liquid into the straight runner 12, the metal liquid will flow into the inner runner 13 along the straight runner 12, and then flow into the two pouring cavities 11 through the inner runner 13. The two pouring cavities 11 perform casting work, and thus two sizes can be cast simultaneously to speed up the detection speed.
[0022] The pouring cavity 11 is also provided with a ring iron 111, which is also disc-shaped. The diameter of the ring iron 111 is smaller than that of the pouring cavity 11, and the width of the ring iron 111 is the same as that of the pouring cavity 11. The ring iron 111 is concentrically arranged with the pouring cavity 11, so that the ring iron 111 can separate the pouring cavity 11 into a circular ring.
[0023] The bottom of the pouring cavity 11 is provided with four cold irons 112, and the upper surface of the cold iron 112 is level with the bottom surface of the pouring cavity 11. The cold iron 112 is fan-shaped, and the four cold irons 112 are evenly arranged along the axial direction of the pouring cavity 11. The cold iron 112 can generate a certain temperature difference in the pouring cavity 11, and thermal stress will be generated under the action of the temperature difference. When cracks appear on the cast metal ring, the cracks will first appear at the position corresponding to the cold iron 112, which can more conveniently find the position of the cracks on the metal ring in the later stage.
[0024] The detection process is as follows: firstly, the cold iron 112 is embedded into the sand mold at the bottom of the casting cavity 11, and the upper surface of the cold iron 112 is arranged at the same height as the bottom surface of the casting cavity 11, then the diameter range of the ring iron 111 is selected according to the need of detecting the properties and chemical composition of the metal, secondly, the ring iron 111 with the smallest diameter is put into the casting cavity 11, and the box cover 14 is improved, finally, the metal liquid is poured into the straight sprue 12, and the metal ring is poured out, that is, the casting process is completed, then the ring iron 111 with different diameters is sequentially put into the casting cavity 11 in the order from small to large, and the metal ring with different inner diameters is finally obtained, and the size of the metal ring with the first crack in the casting process can represent the thermal cracking tendency of the metal, that is, the thermal cracking sensitivity of the metal, and the greater the value, the more sensitive to thermal cracking.
[0025] In summary, the casting cavity 11 and the ring iron 111 can realize the purpose of pouring out the metal ring, and then the size of the ring iron 111 is changed to change the size of the metal ring, so that the first metal ring with a crack is found according to the multiple metal rings poured out, and the size thereof is used as the thermal cracking tendency of the metal, and the purpose of detecting the thermal cracking sensitivity of the metal liquid is realized. The cold iron 112 is arranged, and the crack on the metal ring can be found more conveniently.
[0026] Although the utility model has been described with reference to the preferred embodiments, various improvements can be made and equivalent parts can be replaced without departing from the scope of the utility model, and in particular, the technical features mentioned in each embodiment can be combined in any way as long as there is no structural conflict. The utility model is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.
[0027] In the description of the utility model, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0028] In addition, it needs to be explained that, in the description of the utility model, unless another explicit provision and limitation, the term "mount", "link", "connect" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected; can be mechanical connection, also can be electrical connection; can be directly connected, also can pass through the indirect connection of intermediate medium, can be two element internal communication. For the person skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.
[0029] The term "comprising" or any other similar word is intended to encompass a non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements is not limited to those elements, but can include other elements not expressly listed, or also include elements inherent in the process, article, or apparatus / device.
[0030] So far, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but the person skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without deviating from the principles of the utility model, the person skilled in the art can make equivalent changes or replacements to the related technical features, and the technical schemes after these changes or replacements will fall within the protection scope of the utility model.
Claims
1. A metal heat crack sensitivity detection apparatus comprising a mold box, characterized by: The mold box is provided with disc-shaped casting cavities (11), the casting cavities (11) are communicated with sprues (12), the casting cavities (11) are provided with ring irons (111), the ring irons (111) are concentrically arranged with the casting cavities (11), the width of the ring irons (111) is the same as the width of the casting cavities (11), and the diameter of the ring irons (111) is smaller than the diameter of the casting cavities (11); the bottoms of the casting cavities (11) are provided with cold irons (112), and the upper surfaces of the cold irons (112) are arranged at the same height as the bottoms of the casting cavities (11).
2. The metal heat crack sensitivity detection apparatus according to claim 1, characterized by: The casting cavities (11) are provided in two, the two casting cavities (11) are symmetrically arranged about the sprues (12), the bottoms of the sprues (12) are communicated with inner runners (13), and the two ends of the inner runners (13) are respectively communicated with the two casting cavities (11).
3. The metal heat crack sensitivity detection apparatus according to claim 1, characterized by: The cold irons (112) are provided in the shape of a fan, four cold irons (112) are arranged in each casting cavity (11), and the four cold irons (112) are uniformly arranged along the circumferences of the casting cavities (11).