Sample preparation device of high-temperature alloy standard sample for spectral component detection

Abstract

The utility model relates to the technical field of high-temperature alloy component standard sample detection, and discloses a sample preparation device of a high-temperature alloy standard sample for spectral component detection, which comprises a pouring cup, a mold pipe and a bottom plug which are sequentially arranged from top to bottom, the sprue cup is provided with a conical cavity, a flow opening is formed in the bottom of the sprue cup, and a cylindrical hole communicated with the conical cavity is formed in the flow opening; the mold pipe is provided with an inner cavity, the inner cavity comprises a riser cavity, a casting standard sample cavity and a lower cavity which are communicated with one another, the riser cavity is in an inverted cone shape, and the bottom plug is matched with the lower cavity of the mold pipe. The device provided by the utility model can control the expansion of metal element crystal grains in the standard sample, refine the size of the crystal grains in the standard sample, enable the components to be uniform, and avoid the problems of larger deviation of material element detection values and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature alloy component standard sample detection, in particular to a sample preparation device for high-temperature alloy standard samples used for spectral component detection. Background Art

[0002] Common methods for detecting metal composition include spectral analysis, chemical analysis, and mass spectrometry. Spectroscopic analysis is widely used in the detection of cast high-temperature alloys. This method determines the composition of the metal by measuring the characteristic spectrum of the elements in the metal. When detecting the composition of a specific metal material, it is necessary to first use a standard sample for measurement and calibration, and then measure the composition of the metal material to be tested one by one. The uniformity and stability of the standard sample composition is crucial for detection. Otherwise, inconsistent results with the standard sample will lead to significant differences in the test results of the sample material.

[0003] Currently, the standard practice is to directly sample or melt and cast small pieces of samples from the bulk material to make metal standards. These samples, after passing professional composition testing and meeting standards, are then used to test the composition of alloy materials. Standard samples taken directly from the material itself or individually produced often exhibit uneven composition and grain size. For example, the composition of the periphery and center of the same standard sample can differ significantly, or the composition at the same location can be uneven. When the elemental composition measured at multiple points on a single standard sample differs significantly, inaccurate measurements will occur when testing and comparing the same grade of material, ultimately affecting the accuracy of high-temperature alloy material composition testing. High-temperature alloy standards are difficult to purchase externally. There are only a few high-temperature alloy grade standards available on the market, and they are expensive. Even if some grades are available, it costs a lot of money to outsource full-element composition testing to ensure that the composition meets the composition range for a specific grade before it can be used as a dedicated standard. Utility Model Content

[0004] Purpose of the Utility Model: To address the problems existing in the prior art, the utility model provides a sample preparation device for high-temperature alloy standard samples for spectral component detection. The metal standard samples produced by the utility model have uniform composition and high purity, which facilitates stable component detection and comparison.

[0005] Technical solution: The utility model provides a sample preparation device for high-temperature alloy standard samples for spectral component detection, comprising: a pouring cup, a mold tube and a bottom plug arranged in sequence from top to bottom; the pouring cup is provided with a conical cavity, the bottom of the pouring cup is provided with a flow port, and a cylindrical hole connected to the conical cavity is provided on the flow port; the mold tube is provided with an inner cavity, and the inner cavity includes a riser cavity, a casting standard sample cavity and a lower cavity that are connected to each other, the riser cavity is an inverted cone, and the bottom plug is matched with the lower cavity of the mold tube.

[0006] Furthermore, the bottom plug is movably connected to the mold tube.

[0007] Furthermore, the upper surface of the bottom plug is a conical protrusion, and the upper surface of the bottom plug is in contact with the inner wall of the lower cavity.

[0008] Furthermore, a filter plate is provided in the pouring cup, and the filter plate is located between the conical cavity and the cylindrical hole.

[0009] Preferably, the filter plate is made of refractory material.

[0010] Furthermore, the wall thickness of the casting standard sample cavity is 50-60 mm.

[0011] Furthermore, a lifting lug is provided on the outer wall of the mold tube.

[0012] Preferably, the pouring cup, the mold tube and the bottom plug are made of refractory materials.

[0013] Beneficial effects: Compared with the existing technology, the device provided by the utility model can control the expansion of metal element grains in the standard sample, refine the grain size in the standard sample, make the composition uniform, and avoid problems such as large deviations in the material element detection values. The metal standard samples produced by this device have uniform composition and high purity, which facilitates the stability of component detection and comparison. The specific beneficial effects of the utility model are as follows:

[0014] (1) This device can be reused, and one mold can be used to cast several grades of standard samples, thus reducing production costs;

[0015] (2) This device has a better heat absorption effect on the poured molten steel by setting a thicker wall thickness of the casting standard sample cavity, which can achieve more effective and faster cooling of the molten steel entering the mold tube, solving the problems of grain refinement and uneven composition of the standard sample;

[0016] (3) The pouring cup of this device is designed to be conical, so there will be no spillage or waste when pouring molten steel;

[0017] (4) This device sets a filter between the pouring cup and the mold tube to realize the casting sequence of the molten steel from the pouring cup through the filter plate down to the mold tube, so that the gas and slag in the molten steel are filtered and floated in the pouring cup, making the standard sample bar purer;

[0018] (5) This device sets the mold tube into three parts: the riser cavity, the casting standard sample cavity and the lower cavity: the riser cavity is designed to be an inverted cone, which is conducive to enhancing the shrinkage compensation ability of the standard sample bar and reducing the internal looseness; the casting standard sample cavity is used for standard sample molding; the shape of the lower cavity is matched with the shape of the bottom plug, which is used to seal the bottom of the mold tube, with good airtightness to prevent leakage;

[0019] (6) The upper surface of the bottom plug is designed to be conical, which facilitates the quick separation of the bottom plug and the mold tube, and the standard sample bar is easier to demold;

[0020] (7) High-temperature alloy materials are special materials. Standard samples are difficult to buy and the external procurement price of standard samples is high. Through this device, enterprises can realize the production of standard samples by themselves and reduce costs;

[0021] (8) Compared with the same type of molds, this device can reduce the generation of casting solid waste and reduce pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a sample preparation device for a high-temperature alloy standard sample for spectral component detection according to the present invention;

[0023] Figure 2 This is a cross-sectional view of a sample preparation device for a high-temperature alloy standard sample for spectral component detection according to the present invention;

[0024] Illustrations: 1. Pouring cup; 101. Conical cavity; 102. Filter; 103. Cylindrical hole; 104. Spout; 2. Mold tube; 201. Riser cavity; 202. Casting standard cavity; 203. Lower cavity; 204. Lifting ear; 3. Bottom plug; 4. Crucible; 5. High-temperature alloy steel liquid. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below in conjunction with the embodiments.

[0026] Implementation method 1:

[0027] This embodiment provides a sample preparation device for high temperature alloy standard sample for spectral component detection, such as Figure 1As shown, the device is made of 45# steel bar round billet through CNC machining, and specifically includes: a pouring cup 1, a mold tube 2 and a bottom plug 3 arranged in sequence from top to bottom; a conical cavity 101 is provided in the pouring cup 1, a flow port 104 is provided at the bottom of the pouring cup 1, and a cylindrical hole 103 connected to the conical cavity 101 is provided on the flow port 104; a filter 102 is provided in the conical cavity 101, and the filter 102 is located between the conical cavity 101 and the cylindrical hole 103; optionally, the pouring cup 1 is a refractory brick pouring cup (outer diameter 150mm, height 120mm), and the filter 102 is a zirconia with a diameter of 50mm, a thickness of 20mm, and a porosity of 20ppi The material filter disc has a cylindrical hole 103, a 16mm diameter liquid inlet for pouring high-temperature alloy steel liquid. The mold tube 2 has an inner cavity consisting of a riser cavity 201, a casting standard cavity 202, and a lower cavity 203, which are interconnected. The riser cavity 201 is inverted conical; the casting standard cavity 202 is cylindrical (60mm diameter) with a wall thickness of 50mm, used for standard molding. The bottom plug 3 is movably connected to the mold tube 2. The upper surface of the bottom plug 3 is a conical protrusion, its shape matching the shape of the lower cavity 203. The inner wall of the lower cavity 203 mates with the upper surface of the bottom plug 3, used to seal the bottom of the mold tube 2. Lifting ears 204 are provided on the outer wall of the mold tube 2.

[0028] The steps for using this device are as follows:

[0029] Preparation before sample preparation: First, clean the device with a steel brush grinding head, then hang the mold tube into the baking furnace for baking at a temperature of 300±20℃ for a time of ≥3h (to remove the crystallized water in the mold tube and reduce the generation of pores on the surface of the standard sample ingot). Then, use a crane to hang the baked mold tube onto the bottom plug, ensuring that the upper and lower parts fit tightly to prevent steel leakage during casting.

[0030] Place the mold tube with the bottom plug inserted on the casting platform in the vacuum melting furnace (the placement position is consistent with the center line of the coil crucible pouring port), and install the pouring cup on the upper end of the mold tube riser cavity;

[0031] Pour the smelted molten steel quickly along the conical cavity of the pouring cup. After being filtered by the filter plate, the molten steel enters the mold tube through the cylindrical hole and the outlet. When the molten steel flows to the top of the riser cavity of the mold tube and the feeding gate, the casting is stopped. After the molten steel cools down, the device is lifted out of the furnace.

[0032] (4) Remove the bottom plug and pouring cup of the device, and then demold the alloy standard sample embryo in the mold cavity;

[0033] (5) Manually remove excess pouring material from the alloy standard casting, and use the remaining material as the standard rod;

[0034] (6) Turn the outer diameter of the standard rod from 60 mm to 50 mm, peel off the surface oxide scale, and form a bright rod on the surface;

[0035] (7) Use wire cutting to cut the bright rod into several small round blocks with a thickness of 20-30 mm, and then lathe the end faces of both sides of the small round blocks to make the end faces bright and smooth, and finally obtain the high-temperature alloy spectroscopy test blocks;

[0036] (8) The test block components are subjected to external inspection and internal spectral inspection. If the external inspection elements are uniform and qualified, they can be used as standard samples for batch material testing and for daily component testing.

[0037] Taking B1914 as an example, the standard sample prepared by this device was tested. After the standard sample rod was cut, there was no looseness or shrinkage inside the cross section, and the grain structure inside the standard sample rod was uniform. The standard sample was subjected to spectral detection. The specific data are shown in Table 1. The data of each element in the spectral detection are relatively uniform.

[0038] Table 1

[0039]

[0040] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A sample preparation device for high-temperature alloy standard samples for spectral component detection, characterized in that: include: The pouring cup, mold tube and bottom plug are arranged in sequence from top to bottom; the pouring cup is provided with a conical cavity, the bottom of the pouring cup is provided with a spout, and the spout is provided with a cylindrical hole connected to the conical cavity; the mold tube is provided with an inner cavity, and the inner cavity includes a riser cavity, a casting standard cavity and a lower cavity that are connected to each other, the riser cavity is an inverted cone, and the bottom plug is matched with the lower cavity of the mold tube.

2. The sample preparation device for high-temperature alloy standard samples for spectral component detection according to claim 1, characterized in that: The bottom plug is movably connected to the mold tube.

3. The sample preparation device for high-temperature alloy standard samples for spectral component detection according to claim 1, characterized in that: The upper surface of the bottom plug is a conical protrusion, and the upper surface of the bottom plug is in contact with the inner wall of the lower cavity.

4. The sample preparation device for high-temperature alloy standard samples for spectral component detection according to claim 1, characterized in that: A filter is provided in the pouring cup, and the filter is located between the conical cavity and the cylindrical hole.

5. The sample preparation device for high-temperature alloy standard samples for spectral component detection according to claim 4, characterized in that: The filter disc is made of refractory material.

6. The sample preparation device for high-temperature alloy standard samples for spectral component detection according to claim 1, characterized in that: The wall thickness of the casting standard sample cavity is 50-60 mm.

7. The sample preparation device for high-temperature alloy standard samples for spectral component detection according to claim 1, characterized in that: The outer wall of the mold tube is provided with a lifting lug.

8. The sample preparation device for high-temperature alloy standard samples for spectral component detection according to claim 1, characterized in that: The pouring cup, the mold tube and the bottom plug are made of refractory materials.

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