Equipment for rapidly detecting quality of metal melt

Abstract

Equipment for rapidly detecting the quality of metal melt comprises a vacuum system, a control system and a filtering and sampling system, and the vacuum system is connected with the filtering and sampling system in a sealed mode and used for providing a stable vacuum degree for the filtering and sampling system so as to control stable filtering of the metal melt; the control system controls the vacuum degree and the vacuum degree holding time; the filtering and sampling system comprises a tubular mold with holes, a foamed ceramic filter and a metal tube, the foamed ceramic filter is fixedly connected to the bottom of the tubular mold, the upper end of the tubular mold is in sealed connection with the metal tube, and the metal tube is in sealed connection with the vacuum system. According to the equipment for rapidly detecting the quality of the metal melt, the quality of the metal melt can be simply and rapidly evaluated, and metallographic analysis can be carried out on inclusions.

Description

Technical Field

[0001] The present invention relates to the technical field of metal detection, and more specifically to a device for quickly detecting the quality of molten metal. Background Art

[0002] Molten metal often contains various inclusions, such as metal oxides, carbides, nitrides, borides, etc. These inclusions form intergranular compound crystals during the solidification process of the metal, seriously affecting the product performance. Inclusions are not desired to exist in molten metal. Due to the high temperature of molten metal and the small size of inclusions, it is very difficult to evaluate the quality of molten metal. Currently, methods for measuring molten metal, such as quantitative metallography, although automated, have the problem of whether the sampling is representative. The commonly used K-mode method also has the problem of whether the sampling is representative. Sampling in volumetric analysis methods such as centrifugal analysis is complex and time-consuming, and it is difficult to meet the production requirements. PoDFA removes samples containing inclusions through porous ceramic filtration for quantitative metallographic analysis, but it cannot achieve rapid detection. Summary of the Invention

[0003] In view of this, the present invention aims to provide a device for quickly detecting the quality of molten metal, which can simply and quickly evaluate the quality of molten metal and can perform metallographic analysis on inclusions.

[0004] To achieve the above object, the technical solution of the present invention is as follows -

[0005] A device for quickly detecting the quality of molten metal includes a vacuum system, a control system, and a filtration sampling system. The vacuum system is hermetically connected to the filtration sampling system and is used to provide a stable vacuum degree for the filtration sampling system to control the stable filtration of molten metal. The control system controls the vacuum degree and the vacuum degree holding time. The filtration sampling system includes a perforated tubular mold, a foam ceramic filter sheet, and a metal tube. The foam ceramic filter sheet is fixedly connected to the bottom of the tubular mold. The upper end of the tubular mold is hermetically connected to the metal tube, and the metal tube is hermetically connected to the vacuum system.

[0006] In some embodiments, the thickness of the foam ceramic filter sheet is 10 mm - 80 mm, the pore range is 30 ppi - 200 ppi, and the diameter range is 10 mm - 100 mm.

[0007] In some embodiments, the vacuum system includes a vacuum pump, a vacuum tank, a vacuum pressure sensor, and a pressure gauge. The vacuum pump is hermetically connected to the vacuum tank. The vacuum pressure sensor is provided on the inner wall of the vacuum tank. The vacuum pressure sensor inputs the pressure signal to the pressure gauge, and the pressure gauge is connected to the control system.

[0008] In some embodiments, the control system controls the vacuum degree range to be 0 - 200 KPa, and the vacuum degree holding time to be 0 - 999 s.

[0009] In some embodiments, the tubular mold is made of high-temperature resistant materials such as steel, titanium alloy, SiN or graphite.

[0010] In some embodiments, the metal tube is hermetically connected to the vacuum system through a rubber tube.

[0011] In some embodiments, before use, the tubular mold and the metal tube in contact with the molten metal need to be coated with an anti-adhesion coating and baked and preheated above the melt.

[0012] Compared with the prior art, the device for rapidly detecting the quality of molten metal of the present invention has the following advantages:

[0013] The device for rapidly detecting the quality of molten metal disclosed in the present invention aims at the problems of complex process and long time consumption in the existing molten metal quality detection process, and proposes a device for rapidly detecting the quality of molten metal, which is used for rapidly detecting whether the quality of molten metal meets the production requirements on the site of molten metal smelting and casting. It can well solve the online evaluation of the quality of molten metal, and is simple and effective, providing a basis for improving the quality of castings, and can also conduct metallographic analysis on inclusions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings

[0015] Figure 1 is a schematic diagram of a device for rapidly detecting the quality of molten metal according to the present invention.

[0016] DESCRIPTION OF THE REFERENCE NUMERALS

[0017] 1 - Control system; 2 - Vacuum pump; 3 - Vacuum tank; 4 - Vacuum pressure sensor; 5 - Pressure gauge; 6 - Rubber tube; 7 - Metal tube; 8 - Tubular mold; 9 - Foam ceramic filter disc; 10 - Nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0019] Next, the technical solutions of the present invention will be clearly and completely described with reference to the drawings and in combination with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Next, refer to Figure 1The equipment for quickly detecting the quality of molten metal according to the embodiments of the present invention will be described in combination with the embodiments.

[0021] An equipment for quickly detecting the quality of molten metal includes a vacuum system, a control system, and a filtering and sampling system.

[0022] The vacuum system is hermetically connected to the filtering and sampling system to provide a stable vacuum degree for the filtering and sampling system to control the stable filtration of molten metal. The vacuum system includes a vacuum pump 2, a vacuum tank 3, a vacuum pressure sensor 4, and a pressure gauge 5. The vacuum pump 2 is hermetically connected to the vacuum tank 3. The vacuum pressure sensor 4 is provided on the inner wall of the vacuum tank 3. The vacuum pressure sensor 4 inputs the pressure signal to the pressure gauge 5, and the pressure gauge 5 is connected to the control system 1. The control system 1 can set the vacuum degree and the vacuum degree holding time. The vacuum degree control range is 0 - 200 KPa, and the vacuum degree holding time is 0 - 999 s. The filtering and sampling system includes a perforated tubular mold 8, a foam ceramic filter disc 9, and a metal tube 7. The tubular mold 8 is made of high-temperature resistant materials such as steel, titanium alloy, SiN, or graphite. The foam ceramic filter disc 9 is located at the bottom of the perforated tubular mold and is fixed with a nut 10. The upper end of the tubular mold 8 is hermetically connected to the metal tube 7, and the metal tube is hermetically connected to the vacuum system through a rubber tube 6. The foam ceramic filter disc 9 has a thickness of 10 mm - 80 mm, a pore range of 30 ppi - 200 ppi, and a diameter range of 10 mm - 100 mm.

[0023] Before use, the inner and outer surfaces of the tubular mold 8 and the metal tube 7 that come into contact with the molten metal should be coated with an anti-adhesion coating to prevent the molten metal from eroding the equipment and to facilitate later sampling, and baking preheating should be carried out above the melt. The vacuum degree and time are set through the controller, and the sampling system is inserted into the molten metal to be measured. Under the action of the internal and external differential pressure, the molten metal will pass through the foam ceramic filter disc 9 and enter the tubular mold. Due to the three-dimensional structure of the foam ceramic, the inclusions in the molten metal will be filtered and captured, and the clean molten metal will flow into the mold 8. As the inclusions accumulate, the blockage of the foam ceramic filter disc 9 will increase, and the amount of clean molten metal flowing into the mold 8 will decrease. The quality of the molten metal containing inclusions is judged according to the quality of the clean molten metal in the mold 8, and the quality of the molten metal is evaluated. After the detection is completed at a fixed vacuum degree and fixed time, the tubular mold is quickly placed in cold water for cooling, and then the solidified metal in the tubular mold 8 is taken out and weighed to evaluate the quality of the molten metal. The foam ceramic filter disc 9 can be used for metallographic detection and analysis.

[0024] Compared with the prior art, the equipment for quickly detecting the quality of molten metal according to the present invention has the following advantages:

[0025] The device for quickly detecting the quality of molten metal disclosed by the present invention aims at the problems of complex process and long time consumption in the existing molten metal quality detection process. A device for quickly detecting the quality of molten metal is proposed, which is used for quickly detecting whether the quality of molten metal meets the production requirements at the site of molten metal smelting and casting. It can well solve the on-line evaluation of molten metal quality, is simple and effective, provides a basis for improving the quality of castings, and can conduct metallographic analysis on inclusions.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation on the protection content of the present invention.

[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An apparatus for rapidly detecting the quality of molten metal, characterized in that, It includes a vacuum system, a control system, and a filtration sampling system. The vacuum system is hermetically connected to the filtration sampling system and is used to provide a stable vacuum degree for the filtration sampling system to control the stable filtration of the molten metal. The control system controls the vacuum degree and the vacuum degree holding time. The filtration sampling system includes a perforated tubular mold, a foam ceramic filter disc, and a metal tube. The foam ceramic filter disc is fixedly connected to the bottom of the tubular mold. The upper end of the tubular mold is hermetically connected to the metal tube, and the metal tube is hermetically connected to the vacuum system.

2. The device for quickly detecting the quality of molten metal according to claim 1, characterized in that, The thickness of the foam ceramic filter disc is 10 mm - 80 mm, the pore range is 30 ppi - 200 ppi, and the diameter range is 10 mm - 100 mm.

3. The device for quickly detecting the quality of molten metal according to claim 1, wherein The vacuum system includes a vacuum pump, a vacuum tank, a vacuum pressure sensor, and a pressure gauge. The vacuum pump is hermetically connected to the vacuum tank. The inner wall of the vacuum tank is provided with a vacuum pressure sensor. The vacuum pressure sensor inputs the pressure signal to the pressure gauge, and the pressure gauge is connected to the control system.

4. The device for rapidly detecting the quality of molten metal according to claim 1, wherein, The control system controls the vacuum degree range to be 0 - 200 KPa, and the vacuum degree holding time is 0 - 999 s.

5. The device for quickly detecting the quality of molten metal according to claim 1, characterized in that, The tubular mold is made of high-temperature resistant materials such as steel, titanium alloy, SiN, or graphite.

6. The device for rapidly detecting the quality of molten metal according to claim 1, wherein The metal tube is hermetically connected to the vacuum system through a rubber tube.

7. The device for quickly detecting the quality of molten metal according to claim 1, characterized in that, Before use, the tubular mold and the metal tube in contact with the molten metal need to be coated with an anti-adhesion coating and baked and preheated above the melt.

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