Annular sampling method for titanium ingot GDMS detection

Abstract

The invention discloses an annular sampling method for titanium ingot GDMS detection, and belongs to the technical field of titanium ingot GDMS detection sampling. An annular sampling method for titanium ingot GDMS detection comprises the following steps that firstly, a detected titanium ingot is fixed, and surface treatment is conducted on the outer portion of the detected titanium ingot; step 2, determining a turning area: in the turning area 1, feeding leftwards from a position 1 at the speed of 3mm / min, meanwhile, feeding inwards at the speed of 0.025 mm / r, moving to a position 2 after feeding inwards by 2mm, stopping feeding inwards, and horizontally turning leftwards; the titanium ingot can be sampled in an annular sampling mode, the titanium ingot can be sampled in four positions, annular turning is carried out at the four sampling positions, the damage influence of the sampling on the titanium ingot is small, the sampling duration is 15 hours (including titanium ingot clamping), the sampling loss is 10 kg, sampling can be carried out at the 1 / 5 position, the 2 / 5 position, the 3 / 5 position and the 4 / 5 position of the titanium ingot, the representativeness is high, and the sampling accuracy is high. Therefore, the sampling loss of the titanium ingot can be reduced, the sampling time is shortened, and a representative sampling position can be selected.

Description

Technical Field

[0001] The invention relates to the technical field of GDMS detection sampling of titanium ingots, and in particular to a ring sampling method for GDMS detection of titanium ingots. Background Art

[0002] Titanium metal has unique properties such as high strength, low density, and excellent corrosion resistance, and is widely used in aerospace, chemical industry, marine engineering and other fields. At the same time, titanium also has certain brittleness and chemical activity, which puts forward high requirements for the manufacturing and quality control of titanium ingots. Titanium ingots are metal blocks formed by smelting process during the smelting process of titanium and its alloys. It is the basic material for the production of titanium products (such as titanium plates, titanium rods, titanium tubes, etc.). The quality of titanium ingots directly affects the performance of subsequent products. GDMS is a technology used to analyze trace and trace elements in metal materials, which is very suitable for the detection of high-purity materials such as titanium ingots.

[0003] In the prior art, titanium ingot sampling generally adopts the slicing method or the core drilling method to extract the test sample. The core drilling method is to drill a cylindrical sample from the side of the titanium ingot, and the slicing method is to cut a thin slice from the head or bottom of the titanium ingot as a sample. However, when the slicing method is applied to larger titanium ingots, the material loss is large, the sampling time is long, and the sampling position can only be fixed at the head or tail of the ingot. The core drilling method has large loss, difficult processing, low efficiency, and surface damage, which will leave large diameter holes on the surface of the titanium ingot, affecting subsequent processing and use. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art of reducing titanium ingot sampling loss, reducing sampling time, and being able to select representative sampling positions, and to propose a ring sampling method for GDMS detection of titanium ingots.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A ring sampling method for GDMS detection of titanium ingots, comprising the following steps: Step 1: Fix the detected titanium ingot and perform surface treatment on the outer surface of the detected titanium ingot; Step 2: Determine the turning area: Turning area ①, feed from position 1 to the left at a speed of 3 mm / min, and feed inward at a speed of 0.025 mm / r at the same time, and move to position 2 after feeding inward for 2 mm, stop feeding inward, turn horizontally to the left, and after turning to position 11, start to retract outward at a speed of 0.025 mm / r, and end at position 12, and the lathe stops; Turning area ②, since the marking point a in the turning area ① is turned off, re-mark the midpoint between position 2 and position 11, and use it as another set of marking points a, and set the rotation speed to 80r / min, feed from position 2 to the left at a speed of 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding 2mm inward, go to position 3, stop feeding inward, turn horizontally to the left, after turning to position 10, start to retract outward at a speed of 0.025mm / r, end at position 11, and stop the lathe; turning area ③, since the marking point a in turning area ② is turned off, re-mark the midpoint between position 3 and position 10 and use it as another set of marking points a, set the speed to 80r / min, feed from position 3 to the left at a speed of 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding 2mm inward, go to position 4 and stop. Stop feeding inwards, turn horizontally to the left, after turning to position 9, start to retract outwards at a speed of 0.025mm / r, end at position 10, and stop the lathe; Turning area ⑤, since the mark point a in turning area ③ is turned off, re-mark the midpoint between position 3 and position 10, and use it as another set of mark points a, marked with a 2mm wide mark, set the speed to 80r / min, feed to the left from position 4, the speed is 3mm / min, and feed inwards at a speed of 0.025mm / r at the same time, after feeding inwards 2mm, go to position 5, stop feeding inwards, turn horizontally to the left, after turning to position 6, retract outwards at a speed of 0.025mm / r, and stop the lathe after completely retracting; Turning area Domain ④, replace the reverse tool, set the speed to 80r / min, feed rightward from position 9 at a speed of 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding inward for 2mm, move to position 8, stop feeding inward, turn horizontally to the right, and after turning to position 7, retract the tool outward at a speed of 0.025mm / r. After completely retracting, the lathe stops; Step 3: Mark point a at the standard position of the titanium ingot, remove the titanium bar b from the turning area of ​​the mark point a, and cut the titanium bar b into sample c; Step 4: Standardize the sample c obtained in step 3 to obtain titanium rod d; Step 5: Process the titanium rod d obtained in step 4 into titanium sheets, which can be used for GDMS detection.

[0007] Preferably, the surface treatment in step 1 is a turning or milling surface to remove material.

[0008] Furthermore, the standard positions of the titanium ingots in step three are: 1 / 5, 2 / 5, 3 / 5 and 4 / 5 respectively.

[0009] Furthermore, in step 3, the cutting size range of the titanium strip b is: 10mm-25mm.

[0010] Preferably, the standardization treatment in step 4 includes pickling, drying and vacuum melting, wherein the vacuum pressure is less than 5*10 -2 Pa.

[0011] Furthermore, the diameter range of the titanium rod d obtained in step 4 is: 30mm-60mm.

[0012] Furthermore, the diameter of the titanium rod d is 40 mm.

[0013] Preferably, the thickness of the titanium sheet in step five is in the range of 3 mm to 7 mm.

[0014] Preferably, the thickness of the titanium sheet is 5 mm.

[0015] Compared with the prior art, the present invention provides a ring sampling method for GDMS detection of titanium ingots, which has the following beneficial effects:

[0016] 1. The annular sampling method for GDMS detection of titanium ingots samples the titanium ingot by utilizing annular sampling, and can sample the titanium ingot at four locations, with circular turning at the four sampling locations. This type of sampling has little damage to the titanium ingot, and the duration is 15 hours (including clamping of the titanium ingot). The sampling loss is 10kg, and samples can be taken at positions 1 / 5, 2 / 5, 3 / 5, and 4 / 5 of the titanium ingot. It is highly representative, thereby reducing the sampling loss of the titanium ingot, reducing the sampling time, and being able to select representative sampling locations.

[0017] The parts not involved in the device are the same as the prior art or can be implemented by the prior art. The present invention can sample the titanium ingot by annular sampling, and can sample the titanium ingot at four places, and perform circular turning at the four sampling positions. This type of sampling has little damage to the titanium ingot, and the duration is 15 hours (including clamping of the titanium ingot). The sampling loss is 10kg. Sampling is performed at 1 / 5, 2 / 5, 3 / 5, and 4 / 5 of the titanium ingot, which is highly representative, thereby reducing the sampling loss of the titanium ingot, reducing the sampling time, and being able to select representative sampling positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a ring sampling method for GDMS detection of titanium ingots proposed by the present invention. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are 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 therefore cannot be understood as a limitation on the present invention.

[0021] Example:

[0022] Reference Figure 1 , a ring sampling method for GDMS detection of titanium ingots, comprising the following steps:

[0023] Step 1: Fix the titanium ingot to be tested and perform surface treatment on the outside of the titanium ingot to be tested;

[0024] Step 2: Determine the turning area:

[0025] Turning area ①, feed from position 1 to the left at a speed of 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding inward for 2mm, move to position 2, stop feeding inward, turn horizontally to the left, and after turning to position 11, start to retract outward at a speed of 0.025mm / r, and end at position 12, and the lathe stops;

[0026] Turning area ②, since the mark point a in turning area ① is removed, re-mark the midpoint between position 2 and position 11 and use it as another set of mark points a. Set the rotation speed to 80r / min, feed from position 2 to the left at a speed of 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding inward for 2mm, move to position 3, stop feeding inward, turn horizontally to the left, and after turning to position 10, start to retract outward at a speed of 0.025mm / r, and end at position 11, and the lathe stops.

[0027] Turning area ③, since the mark point a in turning area ② was removed, re-mark the midpoint between position 3 and position 10 and use it as another set of mark points a. Set the rotation speed to 80r / min, feed from position 3 to the left at a speed of 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding inward for 2mm, move to position 4, stop feeding inward, turn horizontally to the left, and after turning to position 9, start to retract outward at a speed of 0.025mm / r, and end at position 10, and the lathe stops.

[0028] Turning area ⑤, since the mark point a in turning area ③ was removed, re-mark the midpoint between position 3 and position 10 and use it as another set of mark points a, marked with a 2mm wide mark, set the speed to 80r / min, feed from position 4 to the left at a speed of 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding inward for 2mm, move to position 5, stop feeding inward, turn horizontally to the left, and after turning to position 6, retract outward at a speed of 0.025mm / r. After completely retracting, the lathe stops.

[0029] Turning area ④, replace the reverse tool, set the speed to 80r / min, feed rightward from position 9 at a speed of 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding inward 2mm, move to position 8, stop feeding inward, turn horizontally to the right, and after turning to position 7, retract outward at a speed of 0.025mm / r. After completely retracting, the lathe stops;

[0030] Step 3: Marking points a at the standard positions of the titanium ingots, taking out titanium bars b from the turning area of ​​the marked points a, and cutting the titanium bars b into samples c;

[0031] Step 4: The sample c obtained in step 3 is subjected to standardization treatment to obtain a titanium rod d;

[0032] Step 5: Processing the titanium rod d obtained in step 4 into a titanium sheet, and the obtained titanium sheet can be used for GDMS detection;

[0033] The surface treatment in the above step 1 is to remove the material by turning or milling the surface.

[0034] The standard positions of the titanium ingots in the above step three are: 1 / 5, 2 / 5, 3 / 5 and 4 / 5 respectively.

[0035] The cutting size range of the titanium strip b obtained in the above step 3 is: 10mm-25mm.

[0036] The standardization treatment in step 4 includes pickling, drying and vacuum melting, wherein the vacuum pressure is less than 5*10 -2 Pa, and then melt the sample c into titanium rod d.

[0037] The diameter of the titanium rod d obtained in step 4 ranges from 30 mm to 60 mm, and the preferred diameter of the titanium rod d in the present invention is 40 mm.

[0038] The thickness of the titanium sheet in the above step 5 ranges from 3 mm to 7 mm, and the preferred thickness of the titanium sheet in this invention is 5 mm.

[0039] In addition, the above-mentioned GDMS is a technology used to analyze trace and trace elements in metal materials, and is very suitable for the detection of high-purity materials such as titanium ingots.

[0040] First, you need to determine the marking point a on the titanium ingot. Use a turning tool to start turning feed at 1600mm-200mm on both sides of the marking point a, and turn inward toward the marking point a in batches. It should be noted that the next time you should start feeding toward the marking point a from the last stop point.

[0041] Secondly, after the turning tool removes the surface layer of the titanium ingot, make a 2mm wide mark at the marking point a. After the turning feed reaches 10mm-30mm, stop feeding and then turn to the marking point a, stop at the mark, and then retract the tool.

[0042] At this time, a titanium strip b with a width of 2 mm and a depth of 10 mm to 30 mm is left at the mark. It is removed to obtain a titanium strip b, and then the titanium strip b is cut or cut into a sample c with a size of 10 mm to 25 mm. The titanium strip b is then subjected to standardization treatment to form a sample c.

[0043] The above-mentioned standardization treatment of titanium strip b mainly includes pickling, drying and vacuum melting, wherein the vacuum pressure is less than 5*10 -2 Pa.

[0044] In addition, sample c after standardization treatment is melted to form titanium rod d with a diameter of 40 mm, and then titanium rod d is tested by GDMS. The test result of titanium rod d can represent the actual situation of the titanium ingot.

[0045] As shown in Table 1:

[0046] Table 1 shows different sampling methods for titanium ingots with a diameter of 1000 mm and a length of 2300 mm:

[0047]

[0048] There are four ways to sample titanium ingots:

[0049] 1. Drilling core samples from titanium ingots in the manner listed in the above table. This sampling method will cause excessive damage to the titanium ingots and seriously affect the titanium ingot products, so it is not considered.

[0050] Second: Slice and sample the titanium ingot using the method in the above table. This type of sampling has little effect on the head and tail slicing of the titanium ingot, but it takes 26 hours to slice the head and tail using a saw (including clamping the titanium ingot), and the sampling loss is 30kg. This method can only detect the two ends of the titanium ingot, and is less representative.

[0051] 3: Surface titanium cutting sampling is carried out on the titanium ingot in the manner shown in the above table. This sampling method has less damage to the titanium ingot. The sampling time is 10 hours and the sampling loss is 5kg. However, this method is limited to surface sampling, the data fluctuates greatly, and the data is inaccurate.

[0052] Four: In order to improve the accuracy of the sampling data, the present invention uses a circular sampling method to sample the titanium ingot, and the titanium ingot can be sampled at four places, and circular turning is performed at the four sampling positions. This type of sampling has little damage to the titanium ingot, and the duration is 15 hours (including clamping of the titanium ingot). The sampling loss is 10kg, and samples are taken at 1 / 5, 2 / 5, 3 / 5, and 4 / 5 of the titanium ingot. The representativeness is strong, which can reduce the sampling loss of the titanium ingot, reduce the sampling time, and select representative sampling positions.

[0053] Reference Figure 1 As shown in the figure, the sampling process steps are as follows:

[0054] Mark point a at 1 / 5 of the titanium ingot.

[0055] Step 1: Clamp the 800-1200mm titanium ingot onto the lathe, and mark position 12 and position 1 16mm to the left and right of point a, and then set the speed to 80r / min.

[0056] Step 2: In turning area ①, feed from position 1 to the left at a speed of 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding inward for 2mm, move to position 2, stop feeding inward, and turn horizontally to the left. After turning to position 11, start to retract outward at a speed of 0.025mm / r, and end at position 12, and the lathe stops.

[0057] Step 3: Turning area ②, since the mark point a in turning area ① has been turned off, re-mark the midpoint between position 2 and position 11 and use it as another set of mark points a, set the speed to 80r / min, feed to the left from position 2 at a speed of 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding inward for 2mm, move to position 3, stop feeding inward, and turn horizontally to the left. After turning to position 10, start to retract outward at a speed of 0.025mm / r, and end at position 11, and the lathe stops.

[0058] Step 4: Turning area ③, since the mark point a in turning area ② has been turned off, re-mark the midpoint between position 3 and position 10 and use it as another set of mark points a, set the speed to 80r / min, feed to the left from position 3, the speed is 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding inward for 2mm, go to position 4, stop feeding inward, turn horizontally to the left, after turning to position 9, start to retract outward at a speed of 0.025mm / r, end at position 10, and stop the lathe.

[0059] Step 5: Turning area ⑤, since the marking point a in turning area ③ has been turned off, re-mark the midpoint between position 3 and position 10 and use it as another set of marking points a, marked with a 2mm wide mark, set the speed to 80r / min, feed to the left from position 4 at a speed of 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding inward for 2mm, go to position 5, stop feeding inward, and turn horizontally to the left. After turning to position 6, retract the tool outward at a speed of 0.025mm / r. The lathe stops after completely retracting.

[0060] Step 6: In turning area ④, replace the reverse tool, set the speed to 80r / min, feed rightward from position 9 at a speed of 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding inward 2mm to position 8, stop feeding inward and turn horizontally to the right. After turning to position 7, retract the tool outward at a speed of 0.025mm / r. The lathe stops after completely retracting.

[0061] Step 7: Take down the titanium strip b, and then cut or cut the titanium strip b into samples c of 10 mm to 25 mm.

[0062] Step 8: Mark three other groups of marking points a at different positions at 2 / 5, 3 / 5, and 4 / 5 of the titanium ingot, and then repeat steps 1 to 7 to obtain a sample c with a total mass greater than 1 kg.

[0063] Step 9: The sample c obtained in step 8 is acid-washed, dried, and then placed under vacuum (pressure < 5*10 -2 Pa), and melted into a titanium rod d with a diameter of 40 mm.

[0064] Step 10: Saw or cut the titanium rod d obtained in step 8 into titanium sheets with a thickness of 5 mm. The obtained titanium sheets can be used for GDMS detection.

[0065] The GDMS sample test data is shown in Table 2 below. The data is stable and reliable.

[0066] Table 2 GDMS sample test data (element content unit: ppm)

[0067]

[0068]

[0069]

[0070] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A ring sampling method for GDMS detection of titanium ingots, characterized in that: The following steps are involved: Step 1: Fix the titanium ingot to be tested and perform surface treatment on the outside of the titanium ingot to be tested; Step 2: Determine the turning area: Turning area ①, feed from position 1 to the left at a speed of 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding inward for 2mm, move to position 2, stop feeding inward, turn horizontally to the left, and after turning to position 11, start to retract outward at a speed of 0.025mm / r, and end at position 12, and the lathe stops; Turning area ②, since the mark point a in turning area ① is removed, re-mark the midpoint between position 2 and position 11 and use it as another set of mark points a. Set the rotation speed to 80r / min, feed from position 2 to the left at a speed of 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding inward for 2mm, move to position 3, stop feeding inward, turn horizontally to the left, and after turning to position 10, start to retract outward at a speed of 0.025mm / r, and end at position 11, and the lathe stops. Turning area ③, since the mark point a in turning area ② was removed, re-mark the midpoint between position 3 and position 10 and use it as another set of mark points a. Set the rotation speed to 80r / min, feed from position 3 to the left at a speed of 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding inward for 2mm, move to position 4, stop feeding inward, turn horizontally to the left, and after turning to position 9, start to retract outward at a speed of 0.025mm / r, and end at position 10, and the lathe stops. Turning area ⑤, since the mark point a in turning area ③ was removed, re-mark the midpoint between position 3 and position 10 and use it as another set of mark points a, marked with a 2mm wide mark, set the speed to 80r / min, feed from position 4 to the left at a speed of 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding inward for 2mm, move to position 5, stop feeding inward, turn horizontally to the left, and after turning to position 6, retract outward at a speed of 0.025mm / r. After completely retracting, the lathe stops. Turning area ④, replace the reverse tool, set the speed to 80r / min, feed rightward from position 9 at a speed of 3mm / min, and feed inward at a speed of 0.025mm / r. After feeding inward 2mm, move to position 8, stop feeding inward, turn horizontally to the right, and after turning to position 7, retract outward at a speed of 0.025mm / r. After completely retracting, the lathe stops; Step 3: Marking points a at the standard positions of the titanium ingots, taking out titanium bars b from the turning area of ​​the marked points a, and cutting the titanium bars b into samples c; Step 4: The sample c obtained in step 3 is subjected to standardization treatment to obtain a titanium rod d; Step 5: Process the titanium rod d obtained in step 4 into a titanium sheet, which can be used for GDMS detection.

2. A ring sampling method for GDMS detection of titanium ingots according to claim 1, characterized in that: The surface treatment in step 1 is a turning or milling surface to remove material.

3. The ring sampling method for GDMS detection of titanium ingots according to claim 1 is characterized in that: The standard positions of the titanium ingots in step three are: 1 / 5, 2 / 5, 3 / 5 and 4 / 5.

4. A ring sampling method for GDMS detection of titanium ingots according to claim 1 or 3, characterized in that: In step 3, the cutting size range of the titanium strip b is: 10mm-25mm.

5. The ring sampling method for GDMS detection of titanium ingots according to claim 1 is characterized in that: The standardization treatment in step 4 includes pickling, drying and vacuum melting, wherein the vacuum pressure is less than 5*10 -2 Pa.

6. A ring sampling method for GDMS detection of titanium ingots according to claim 5, characterized in that: The diameter range of the titanium rod d obtained in step 4 is: 30mm-60mm.

7. A ring sampling method for GDMS detection of titanium ingots according to claim 6, characterized in that: The diameter of the titanium rod d is 40 mm.

8. The ring sampling method for GDMS detection of titanium ingots according to claim 1, characterized in that: The thickness range of the titanium sheet in step 5 is: 3mm-7mm.

9. A ring sampling method for GDMS detection of titanium ingots according to claim 8, characterized in that: The thickness of the titanium sheet is 5 mm.

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