A circular sampling method for GDMS detection of titanium ingots

Abstract

The present invention discloses a circular sampling method for GDMS detection of titanium ingots, belonging to the technical field of GDMS detection sampling of titanium ingots. A circular sampling method for GDMS detection of titanium ingots includes the following steps: Step 1: Fix the titanium ingot to be detected and perform surface treatment on the outer surface of the detected titanium ingot; Step 2: Determine the turning area: Turning area ①, feed the tool from position 1 to the left at a speed of 3 mm / min, and at the same time feed the tool inward at a speed of 0.025 mm / r. After feeding the tool inward by 2 mm, move to position 2 and stop feeding the tool inward, then turn horizontally to the left. The present invention can sample the titanium ingot by means of circular sampling, and can sample the titanium ingot at four places. Circular turning is performed at the four sampling positions. This kind of sampling has little damage to the titanium ingot, and the time required is 15 hours (including the clamping of the titanium ingot). The sampling loss is 10 kg. Sampling can be carried out at the 1 / 5, 2 / 5, 3 / 5, and 4 / 5 positions of the titanium ingot, with strong representativeness. Furthermore, the sampling loss of the titanium ingot can be reduced, the sampling time can be reduced, and representative sampling positions can be selected.

Description

Technical Field

[0001] The present invention relates to the technical field of GDMS detection sampling for titanium ingots, and particularly relates to an annular 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 fields such as aerospace, chemical engineering, and ocean engineering. At the same time, titanium also has certain brittleness and chemical activity, which poses relatively high requirements for the manufacturing and quality control of titanium ingots. Titanium ingots are metal blocks formed through a melting process during the smelting of titanium and its alloys. It is the basic material for producing 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 ultratrace elements in metal materials and is very suitable for the detection of high-purity materials such as titanium ingots.

[0003] In the prior art, sampling of titanium ingots generally uses the slicing method or the core drilling method to take detection samples. The core drilling method is to drill a cylindrical specimen on 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 specimen. However, when the slicing method is applied to titanium ingots with larger sizes, the material loss is large, the sampling time is long, and the sampling position can only be fixed at the ingot head or ingot tail. The core drilling method has large losses, difficult processing, and low efficiency, and the surface damage will leave a hole with a relatively large diameter 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 the sampling loss of titanium ingots, reducing the sampling time, and being able to select representative sampling positions, and to propose an annular sampling method for GDMS detection of titanium ingots.

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

[0006] A circular sampling method for GDMS detection of titanium ingots, comprising the following steps: Step 1: Fix the titanium ingot to be detected 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 at the same time feed inward at a speed of 0.025 mm / r. After feeding inward 2 mm, move to position 2, stop feeding inward, turn horizontally to the left. After turning to position 11, start retracting the tool outward at a speed of 0.025 mm / r and end at position 12, then stop the lathe; Turning area ②, since the marking point a in turning area ① is cut off, re-mark the midpoint between position 2 and position 11 and use it as another set of marking points a. Set the rotational speed to 80 r / min, feed from position 2 to the left at a speed of 3 mm / min, and at the same time feed inward at a speed of 0.025 mm / r. After feeding inward 2 mm, move to position 3, stop feeding inward, turn horizontally to the left. After turning to position 10, start retracting the tool outward at a speed of 0.025 mm / r and end at position 11, then stop the lathe; Turning area ③, since the marking point a in turning area ② is cut off, re-mark the midpoint between position 3 and position 10 and use it as another set of marking points a. Set the rotational speed to 80 r / min, feed from position 3 to the left at a speed of 3 mm / min, and at the same time feed inward at a speed of 0.025 mm / r. After feeding inward 2 mm, move to position 4, stop feeding inward, turn horizontally to the left. After turning to position 9, start retracting the tool outward at a speed of 0.025 mm / r and end at position 10, then stop the lathe; Turning area ⑤, since the marking point a in turning area ③ is cut off, re-mark the midpoint between position 3 and position 10 and use it as another set of marking points a, marked as a 2-mm-wide mark. Set the rotational speed to 80 r / min, feed from position 4 to the left at a speed of 3 mm / min, and at the same time feed inward at a speed of 0.025 mm / r. After feeding inward 2 mm, move to position 5, stop feeding inward, turn horizontally to the left. After turning to position 6, retract the tool outward at a speed of 0.025 mm / r. After completely retracting, stop the lathe; Turning area ④, replace the reverse tool, set the rotational speed to 80 r / min, feed from position 9 to the right at a speed of 3 mm / min, and at the same time feed inward at a speed of 0.025 mm / r. After feeding inward 2 mm, move to position 8, stop feeding inward, turn horizontally to the right. After turning to position 7, retract the tool outward at a speed of 0.025 mm / r. After completely retracting, stop the lathe; Step 3: Mark the marking points a at the standard positions of the titanium ingot respectively, take the titanium strip b from the turning area of the marking point a, and cut the titanium strip b to form the sample c; Step 4: Obtain the titanium rod d by standardizing the sample c obtained in Step 3; Step 5: Process the titanium rod d obtained in Step 4 into titanium sheets, and the obtained titanium sheets can be used for GDMS detection.

[0007] Preferably, the surface treatment in Step 1 is turning or milling the surface to remove materials.

[0008] Further, the standard positions of the titanium ingot in Step 3 are respectively at 1 / 5, 2 / 5, 3 / 5, and 4 / 5 positions.

[0009] Furthermore, the slitting size range of the titanium bar b in Step 3 is: 10 mm - 25 mm.

[0010] Preferably, the standardization treatment in Step 4 includes pickling, drying, and vacuum melting. Among them, the pressure under the vacuum condition is < 5 * 10 -2 Pa.

[0011] Further, the diameter range of the titanium bar d obtained in Step 4 is: 30 mm - 60 mm.

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

[0013] Preferably, the thickness range of the titanium sheet in Step 5 is: 3 mm - 7 mm.

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

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

[0016] 1. The circular sampling method for GDMS detection of titanium ingots samples the titanium ingot by using the circular sampling method, and can sample the titanium ingot at four places. Circular turning is performed at the four sampling positions. This kind of sampling has little damage to the titanium ingot, and the time is 15 hours (including titanium ingot clamping). The sampling loss is 10 kg. It can sample at the 1 / 5, 2 / 5, 3 / 5, and 4 / 5 positions of the titanium ingot, with strong representativeness. Furthermore, it can reduce the sampling loss of the titanium ingot, reduce the sampling time, and be able to select representative sampling positions.

[0017] For the parts not involved in this device, they are the same as or can be implemented by the prior art. The present invention can sample the titanium ingot by using the circular sampling method, and can sample the titanium ingot at four places. Circular turning is performed at the four sampling positions. This kind of sampling has little damage to the titanium ingot, and the time is 15 hours (including titanium ingot clamping). The sampling loss is 10 kg. It samples at the 1 / 5, 2 / 5, 3 / 5, and 4 / 5 positions of the titanium ingot, with strong representativeness. Furthermore, it can reduce the sampling loss of the titanium ingot, reduce the sampling time, and be able to select representative sampling positions. Brief Description of the Drawings

[0018] Figure 1 It is a schematic diagram of a circular sampling method for GDMS detection of titanium ingots proposed by the present invention. Detailed Embodiments

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

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and 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 therefore should not be construed as a limitation of the present invention.

[0021] Embodiment:

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

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

[0024] Step 2: Determine the turning area:

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

[0026] Turning area ②, Since the marked point a in turning area ① is turned off, re-mark the midpoint between position 2 and position 11 and use it as another set of marked points a. Set the rotational speed to 80 r / min, feed in from position 2 to the left at a speed of 3 mm / min, and at the same time feed in inward at a speed of 0.025 mm / r. After feeding in 2 mm inward, move to position 3, stop feeding in inward, turn horizontally to the left. After turning to position 10, start to retract the tool at a speed of 0.025 mm / r, and end at position 11. The lathe stops rotating;

[0027] Turning area ③, Since the marked 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 marked points a. Set the rotational speed to 80 r / min, feed in from position 3 to the left at a speed of 3 mm / min, and at the same time feed in inward at a speed of 0.025 mm / r. After feeding in 2 mm inward, move to position 4, stop feeding in inward, turn horizontally to the left. After turning to position 9, start to retract the tool at a speed of 0.025 mm / r, and end at position 10. The lathe stops rotating;

[0028] Turning area ⑤: Since the marked 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 marked points a, marked as a 2-mm-wide mark. Set the rotational speed to 80 r / min, feed in from position 4 to the left at a speed of 3 mm / min, and at the same time feed in inward at a speed of 0.025 mm / r. After feeding in inward for 2 mm, move to position 5, stop feeding in inward, turn horizontally to the left. After turning to position 6, retract the tool outward at a speed of 0.025 mm / r. After completely retracting, stop the lathe;

[0029] Turning area ④: Replace the turning tool with a facing tool, set the rotational speed to 80 r / min, feed in from position 9 to the right at a speed of 3 mm / min, and at the same time feed in inward at a speed of 0.025 mm / r. After feeding in inward for 2 mm, move to position 8, stop feeding in inward, turn horizontally to the right. After turning to position 7, retract the tool outward at a speed of 0.025 mm / r. After completely retracting, stop the lathe;

[0030] Step 3: Mark marked points a at the standard positions of the titanium ingot respectively. Remove the titanium strip b from the turning area of the marked points a, and cut the titanium strip b to form samples c;

[0031] Step 4: Subject the samples c obtained in Step 3 to standardization treatment to obtain titanium rods d;

[0032] Step 5: Process the titanium rods d obtained in Step 4 into titanium sheets, and the obtained titanium sheets can be used for GDMS detection;

[0033] The surface treatment in the above Step 1 is to remove the turned or milled surface of the material.

[0034] The standard positions of the titanium ingot in the above Step 3 are respectively: at 1 / 5, 2 / 5, 3 / 5, and 4 / 5.

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

[0036] The standardization treatment in the above Step 4 includes pickling, drying, and vacuum melting. Among them, the pressure under the vacuum condition is < 5×10 -2 Pa, and then melt the sample c into a titanium rod d.

[0037] Moreover, the diameter range of the obtained titanium rod d in Step 4 is: 30 mm - 60 mm. In this invention, the preferred diameter of the titanium rod d is 40 mm.

[0038] The thickness range of the titanium sheet in the above Step 5 is: 3 mm - 7 mm. In this invention, the preferred thickness of the titanium sheet is 5 mm.

[0039] In addition, the above GDMS is a technique for analyzing trace and ultra-trace elements in metal materials and is very suitable for detecting high-purity materials such as titanium ingots.

[0040] First, it is necessary to determine the marking point a on the titanium ingot. At 1600 mm - 200 mm on both sides of the marking point a, start turning with a lathe tool and turn inwards towards the marking point a in stages. It should be noted that the next turning should start from the position where the previous turning stopped and turn towards the marking point a.

[0041] Secondly, after the lathe tool has turned off the surface layer of the titanium ingot, make a 2-mm-wide mark at the marking point a. After turning in 10 mm - 30 mm, stop turning and then turn towards the marking point a until reaching the marked position and then retract the tool.

[0042] At this time, there remains a titanium strip b with a width of 2 mm and a depth of 10 mm - 30 mm at the marked position. Remove it to obtain the titanium strip b, and then cut or divide the titanium strip b into samples c with a length of 10 mm - 25 mm. Then, after standardizing the titanium strip b, form the sample c.

[0043] The standardization treatment of the above titanium strip b mainly includes pickling, drying, and vacuum melting. Among them, the pressure under vacuum conditions is < 5×10 -2 Pa.

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

[0045] As shown in Table 1:

[0046] The situations of different sampling methods for a titanium ingot with a diameter of 1000 mm and a length of 2300 mm in Table 1:

[0047]

[0048] The sampling methods for the titanium ingot are divided into the following four types:

[0049] One: Core sampling of the titanium ingot is carried out by the method in the above table. This sampling method causes too much damage to the titanium ingot and seriously affects the titanium ingot product, so it is not considered.

[0050] Two: Section sampling of the titanium ingot is carried out by the method in the above table. This sampling has less impact on the head and tail sections of the titanium ingot, but it takes 26 hours (including titanium ingot clamping) to section the head and tail using a sawing machine, and its sampling loss is 30 kg. This method can only detect both ends of the titanium ingot and has poor representativeness.

[0051] III: The surface of the titanium ingot is sampled by turning in the manner shown in the above table. This sampling method has less damage to the titanium ingot. The sampling duration is 10 hours and the sampling loss is 5 kg. However, this method is only limited to surface sampling, with large data fluctuations and inaccurate data.

[0052] IV: In order to improve the accuracy of sampling data, in the present invention, the titanium ingot is sampled by means of annular sampling, and the titanium ingot can be sampled at four places. Annular turning is performed at the four sampling positions. This sampling method has less damage to the titanium ingot, and the duration is 15 hours (including the clamping of the titanium ingot). The sampling loss is 10 kg. Sampling is carried out at the 1 / 5, 2 / 5, 3 / 5, and 4 / 5 positions of the titanium ingot, with strong representativeness. Furthermore, it can reduce the sampling loss of the titanium ingot, reduce the sampling time, and be able to select representative sampling positions.

[0053] Refer to Figure 1 As shown in

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

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

[0056] Step 2: Machine area ①. Feed in from position 1 to the left at a speed of 3 mm / min, and at the same time feed in inward at a speed of 0.025 mm / r. After feeding in inward by 2 mm, move to position 2, stop feeding in inward, and machine horizontally to the left. After machining to position 11, start to retract the tool outward at a speed of 0.025 mm / r and end at position 12, then stop the lathe.

[0057] Step 3: Machine area ②. Since the marking point a in machine area ① has been machined off, re-mark the midpoint between positions 2 and 11 and use it as another set of marking point a. Set the rotational speed to 80 r / min. Feed in from position 2 to the left at a speed of 3 mm / min, and at the same time feed in inward at a speed of 0.025 mm / r. After feeding in inward by 2 mm, move to position 3, stop feeding in inward, and machine horizontally to the left. After machining to position 10, start to retract the tool outward at a speed of 0.025 mm / r and end at position 11, then stop the lathe.

[0058] Step 4: Turning area ③. Since the marked 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 marked points a. Set the rotational speed to 80 r / min, feed from position 3 to the left at a speed of 3 mm / min, and at the same time feed inward at a speed of 0.025 mm / r. After feeding inward 2 mm, move to position 4, stop feeding inward, turn horizontally to the left. After turning to position 9, start retracting the tool outward at a speed of 0.025 mm / r and end at position 10, then stop the lathe.

[0059] Step 5: Turning area ⑤. Since the marked 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 marked points a, marked as a mark 2 mm wide. Set the rotational speed to 80 r / min, feed from position 4 to the left at a speed of 3 mm / min, and at the same time feed inward at a speed of 0.025 mm / r. After feeding inward 2 mm, move to position 5, stop feeding inward, turn horizontally to the left. After turning to position 6, retract the tool outward at a speed of 0.025 mm / r, and stop the lathe after completely retracting.

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

[0061] Step 7: Remove titanium bar b, and then cut or slice titanium bar b into samples c with a size of 10 mm - 25 mm.

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

[0063] Step 9: Acid wash and dry the samples c obtained in Step 8, and then melt them into titanium bars d with a diameter of 40 mm under vacuum conditions (pressure < 5*10 -2 Pa).

[0064] Step 10: Saw or slice the titanium bars d obtained in Step 8 into titanium sheets with a thickness of 5 mm, and the obtained titanium sheets can be used for GDMS detection.

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

[0066] Table 2 GDMS Sample Detection Data (element content unit: ppm)

[0067]

[0068]

[0069]

[0070] As mentioned above, it is only the preferred specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A circular sampling method for GDMS detection of titanium ingots, characterized in that, It includes the following steps: Step 1: Fix the titanium ingot for detection and perform surface treatment on the outer surface of the detected titanium ingot; Step 2: Determine the turning areas: Turning area ①: Feed the tool from position 1 to the left at a speed of 3 mm / min, and at the same time feed the tool inward at a speed of 0.025 mm / r. After feeding the tool inward by 2 mm, move to position 2, stop feeding the tool inward, turn the tool horizontally to the left. After turning to position 11, start to retract the tool outward at a speed of 0.025 mm / r, and end at position 12. Then stop the lathe; Turning area ②: Since the marking point a within turning area ① is turned off, re-mark the midpoint between position 2 and position 11 and use it as another set of marking point a. Set the rotational speed to 80 r / min, feed the tool from position 2 to the left at a speed of 3 mm / min, and at the same time feed the tool inward at a speed of 0.025 mm / r. After feeding the tool inward by 2 mm, move to position 3, stop feeding the tool inward, turn the tool horizontally to the left. After turning to position 10, start to retract the tool outward at a speed of 0.025 mm / r, and end at position 11. Then stop the lathe; Turning area ③: Since the marking point a within turning area ② is turned off, re-mark the midpoint between position 3 and position 10 and use it as another set of marking point a. Set the rotational speed to 80 r / min, feed the tool from position 3 to the left at a speed of 3 mm / min, and at the same time feed the tool inward at a speed of 0.025 mm / r. After feeding the tool inward by 2 mm, move to position 4, stop feeding the tool inward, turn the tool horizontally to the left. After turning to position 9, start to retract the tool outward at a speed of 0.025 mm / r, and end at position 10. Then stop the lathe; Turning area ⑤: Since the marking point a within turning area ③ is turned off, re-mark the midpoint between position 3 and position 10 and use it as another set of marking point a, marked as a 2-mm-wide mark. Set the rotational speed to 80 r / min, feed the tool from position 4 to the left at a speed of 3 mm / min, and at the same time feed the tool inward at a speed of 0.025 mm / r. After feeding the tool inward by 2 mm, move to position 5, stop feeding the tool inward, turn the tool horizontally to the left. After turning to position 6, retract the tool outward at a speed of 0.025 mm / r. After completely retracting, stop the lathe; Turning area ④: Replace the turning tool with a facing tool, set the rotational speed to 80 r / min, feed the tool from position 9 to the right at a speed of 3 mm / min, and at the same time feed the tool inward at a speed of 0.025 mm / r. After feeding the tool inward by 2 mm, move to position 8, stop feeding the tool inward, turn the tool horizontally to the right. After turning to position 7, retract the tool outward at a speed of 0.025 mm / r. After completely retracting, stop the lathe; Step 3: Mark the marking point a at the standard positions of the titanium ingot respectively. Remove the titanium strip b from the turning area of the marking point a, and cut the titanium strip b to form the sample c; Step 4: Standardize the sample c obtained in Step 3 to obtain the titanium rod d; Step 5: Process the titanium rod d obtained in Step 4 into titanium sheets, and the obtained titanium sheets can be used for GDMS detection.

2. The annular sampling method for GDMS detection of titanium ingots according to claim 1, wherein In Step 1, the surface treatment is turning or milling to remove the material on the surface.

3. The annular sampling method for GDMS detection of titanium ingots according to claim 1, wherein The standard positions of the titanium ingot in Step 3 are respectively: at 1 / 5, 2 / 5, 3 / 5, and 4 / 5.

4. A circular sampling method for GDMS detection of titanium ingots according to claim 1 or 3, characterized in that, In step three, the slitting dimension range of titanium bar b is: 10 mm - 25 mm.

5. A circular sampling method for GDMS detection of titanium ingots according to claim 1, characterized in that, The standardization process in Step 4 includes pickling, drying, and vacuum melting. Among them, the pressure under vacuum conditions < 5 * 10 -2 Pa.

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

7. A circular 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. A circular sampling method for GDMS detection of titanium ingots according to claim 1, characterized in that, In step five, the thickness range of the titanium sheet is: 3 mm - 7 mm.

9. A circular 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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