CN113358450A - Sampling method of wire rod non-metallic inclusion inspection sample - Google Patents
Sampling method of wire rod non-metallic inclusion inspection sample Download PDFInfo
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- CN113358450A CN113358450A CN202110637446.5A CN202110637446A CN113358450A CN 113358450 A CN113358450 A CN 113358450A CN 202110637446 A CN202110637446 A CN 202110637446A CN 113358450 A CN113358450 A CN 113358450A
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- 238000005070 sampling Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000007689 inspection Methods 0.000 title claims abstract description 29
- 238000000227 grinding Methods 0.000 claims abstract description 57
- 238000012360 testing method Methods 0.000 claims abstract description 41
- 239000002184 metal Substances 0.000 claims abstract description 30
- 229910052751 metal Inorganic materials 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 25
- 238000005520 cutting process Methods 0.000 claims abstract description 19
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 238000005498 polishing Methods 0.000 claims description 12
- 238000007664 blowing Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 210000002268 wool Anatomy 0.000 claims description 2
- 238000000861 blow drying Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005088 metallography Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/32—Polishing; Etching
Abstract
A sampling method of a test sample for inspecting non-metallic inclusion of a wire rod belongs to the field of inspection methods of non-metallic inclusion of the wire rod. The invention solves the problems of low wire rod inspection efficiency and increased wire rod inspection cost caused by the existing sampling method for wire rod inspection. The sampling method comprises the steps of sampling a material section, designing a metal base for placing the material section, processing and grinding the material section, inlaying, manually grinding, cleaning and blow-drying. Through the sampling method of the test sample for inspecting the nonmetallic inclusions in the wire rods, the sampling time of the wire rods for inspection can be effectively prolonged, compared with the traditional wire cutting, the sampling time is shortened, the efficiency of wire rod tests is improved, and the cost of the wire rods during sampling is reduced.
Description
Technical Field
The invention relates to a wire rod sampling method, and belongs to the field of wire rod non-metallic inclusion inspection methods.
Background
The wire rod is one of hot rolled section steel with the smallest section size, and the hot rolled round steel which is supplied in coils with eight specifications of 5-9 mm in diameter is generally called the wire rod in China. Wire is also called wire rod because it is delivered as a coil. The concept of wire rods is slightly different from that of wire rods in China, the wire rods have other shapes besides circular sections, and the diameters of the wire rods are different due to different requirements and different production technology levels. The wire rod can be divided into a high-speed wire rod and a common wire rod according to different rolling mills, and the wire rod is generally made of common carbon steel and high-quality carbon steel. According to different steel distribution catalogues and purposes, the wire rods comprise common low-carbon steel hot-rolled disc strips, high-quality carbon steel wire rods, carbon welding rod wire rods, hardened and tempered threaded wire rods, wire rods for manufacturing steel wire ropes, wire rods for piano steel wires, stainless steel wire rods and the like;
the non-metallic inclusion of wire rod inspection is cut through cross section diameter with sample cutting position need, the sample is conventional to be surely got the mode and is used the metallography cutting machine to cut, but the specification is difficult to the centre gripping at the wire rod cutting machine anchor clamps below phi 10mm, cutting piece thickness also can cause cutting position deviation and cause the testing result inaccurate, adopt the wire-electrode cutting simultaneously can accurately cut in sample diameter department, but longer influence check-up time and detection efficiency through wire-electrode cutting operating time, and the equipment and spare part expense that use the wire-electrode cutting are higher, inspection cost increases.
In view of the above, there is a need for a sampling method of a wire rod non-metallic inclusion inspection sample, which is convenient for clamping, has accurate inspection result, high inspection efficiency and low inspection cost, and is used to solve the above problems.
Disclosure of Invention
The invention solves the problems of low wire rod inspection efficiency and increased wire rod inspection cost caused by the existing sampling method for wire rod inspection, and further discloses a sampling method of a sample for inspecting non-metallic inclusion of a wire rod. The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention.
The technical scheme of the invention is as follows:
a sampling method of a sample for inspecting non-metallic inclusions in a wire rod comprises the following steps:
the method comprises the following steps: sampling the material section, cutting a sample with the length of 20-40 mm in the longitudinal direction on the material section to ensure that the inspection area of the sample section is 190-210 mm2；
Step two: the design is used for placing the metal base of the test material section, three semi-cylindrical grooves with different radiuses are arranged on the metal base, and the radiuses of the semi-cylindrical grooves are R respectively1、R2And R3，R1＜R2＜R3The three semi-cylindrical grooves with different radiuses are in a group, and a plurality of groups of semi-cylindrical grooves are arrayed on the metal base;
step three: placing the sample section in a semi-cylindrical groove of a metal base, placing the metal base on an electromagnetic chuck of a plane grinder, fixing the sample section on the plane grinder, grinding the sample section, and grinding the sample section with the same specification each time;
step four: inlaying the ground test material section in a hot inlaying mode, wherein the inlaying diameter is 25-45 mm;
step five: manually grinding the embedded test material section, and grinding off the surface deformation layer of the test sample until the surface of the test sample is flat;
step six: and cleaning the ground sample, and drying the cleaned sample by blowing to obtain a metallographic specimen for inspecting nonmetallic inclusions.
Further, in the sampling in the first step, specifically:
when the diameter of the sample section is more than or equal to phi 10mm, the length of the sample section is 20 mm;
when the diameter of the sample section is less than phi 10mm and less than phi 8mm, the length of the sample section is 25 mm;
when the diameter of the sample section is less than phi 8mm and less than phi 7mm, the length of the sample section is 30 mm;
when the diameter of the sample section is less than phi 7mm and less than phi 6mm, the length of the sample section is 35 mm;
when the diameter of the sample section is less than phi 6mm and less than phi 5mm, the length of the sample section is 40 mm.
Further, the design of the metal base in the second step specifically includes:
the metal base is made of GCr15Has a length L of 300mm, a width W of 200mm, a height H of 10mm, and a semi-cylindrical groove R on the metal base1＝2mm，R2＝3mm，R34mm, radius R1Has a semi-cylindrical groove with a radius of R2Has a radius of R, and the distance between the semi-cylindrical grooves is S1, S1 is 5mm2Has a semi-cylindrical groove with a radius of R3The distance between the semi-cylindrical grooves is S2, S2 is 8mm, the distance between two adjacent groups of semi-cylindrical grooves is S3, S3 is 8mm, the distance between the grooves on two sides of the metal base is S4, and S4 is 6.5 mm.
Further, in the third step, the method specifically comprises the following steps:
the radius of the sample section with the diameter of phi 5.5mm to phi 6mm is R1The grinding size of the grinding machine is 2.75mm-3 mm;
the radius of the sample section with the diameter of phi 6mm less than that of the sample section and the diameter of phi 8mm less than that of the sample section is R2The grinding size of the grinding machine is 3mm-4 mm;
the radius of the sample section with the diameter of phi 8mm < the sample section diameter of phi 10mm is R3The grinding size of the grinding machine is 4mm-5 mm.
Further, the surface grinding machine in the third step is an M7130 surface grinding machine.
Further, the grinding of the test material section in the fifth step specifically comprises:
the pre-grinding machine adopts an M-2 metallographic sample pre-grinding machine, and the grinding and polishing machine is a MoPao260 metallographic sample grinding and polishing machine;
(1) carrying out coarse grinding on the sample by using No. 240 metallographic waterproof abrasive paper, wherein the grinding depth is 0.4-0.6 mm;
(2) grinding a sample by using No. 600 metallographic waterproof abrasive paper, wherein the grinding depth is 0.2-0.35 mm;
(3) grinding a sample by using 1200# metallographic waterproof abrasive paper, wherein the thickness of the ground sample is 0.005-0.007 mm;
(4) polishing the sample on a canvas fabric by adopting a 7-micron diamond polishing agent for 3-5 min;
(5) and polishing the sample on the wool fabric by adopting a diamond polishing agent with the diameter of 2.5 mu m for 2-3 min.
Further, the step six includes washing the sample, specifically: and cleaning the sample by using clean water and absolute ethyl alcohol in sequence, and drying the cleaned sample by blowing in one direction.
Further, the sample section hot-embedding manner in the fourth step specifically comprises:
(1) using an ATM Opal X-Press type mosaic machine, turning on a power supply of the mosaic machine, switching on a circuit and turning on the power supply to enable a water circulation system to normally operate;
(2) placing the test surface of the test section on a piston of an embedding machine downwards, operating the embedding machine to enable the piston to fall down, pouring resin embedding material, changing a mold sealing cover, and beginning to embed the test section;
after the inlaying is finished, waiting for the cooling of the inlaying machine, opening the mould cover of the inlaying machine, automatically lifting the piston, and taking out the test material section.
The invention has the beneficial effects that:
the sampling method of the sample for inspecting the non-metallic inclusion of the wire rod effectively solves the problem that the small-diameter wire rod is difficult to sample when the non-metallic inclusion test is carried out, the wire rod sample section is fixed and processed through the metal base, compared with the traditional wire cutting, the sampling time is shortened, the wire rod test efficiency is improved, the equipment and material consumption cost required by the sampling method is lower, and the sampling method has better economic benefit compared with the traditional wire cutting.
Drawings
FIG. 1 is a top view of a metal base;
FIG. 2 is a front view of a metal base;
fig. 3 is a side view of a metal base.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It should be understood that the description is intended to be exemplary, and not intended to limit the scope of the invention. In the following description, moreover, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The first embodiment is as follows: in the method for sampling the test sample for inspecting the non-metallic inclusions in the wire rod, taking the wire rod with the diameter of phi 5.5mm or more and the diameter of the wire rod of 6mm or less as an example, according to GB/T10561-2005, 3 samples steel rods with the diameter or the side length of less than 25mm, the inspection surface is the whole section passing through the diameter, and the length of the inspection surface is ensured to obtain about 200mm2The inspection area "of (a), therefore, a plurality of 40mm wire rods were first taken as samples;
then a plurality of samples are placed on a metal base on the electromagnetic chuck, the diameter of the sample section with the diameter of 5.5mm or more and 6mm or less is equal to the radius R1The grinding size of the semi-cylindrical groove is 2.75-3 mm, 30 test material sections can be arranged on the metal base each time, 40min is needed for grinding the 30 test material sections by using a grinding machine, and the average processing time of a single test material section is about 1.3 min;
if the sampling method is the existing sampling method, the grinding machine processing is changed into the linear cutting processing, the other steps are not changed, taking a wire rod with the diameter of phi 5.5mm and the diameter of 6mm as an example, the linear cutting length is 5.5-6mm, the length of a sample segment is 40mm, one sample segment can be installed in each processing, and the processing time of each sample segment is 15 min.
The second embodiment is as follows: in the method for sampling the test sample for inspecting the non-metallic inclusions in the wire rod, taking the wire rod with the diameter of phi 6mm being more than the wire rod with the diameter of 8mm as an example, according to GB/T10561-2005, 3 samples steel rods with the diameter or the side length being less than 25mm, the inspection surface is the whole section passing through the diameter, and the length of the inspection surface is ensured to be about 200mm2The inspection area "of (a), therefore, a plurality of wire rods of 30 to 35mm are first taken as samples;
then a plurality of samples are placed on a metal base on the electromagnetic chuck, the diameter of the wire rod with the diameter of phi 6mm being more than 8mm and the radius of the wire rod being R2The grinding size of the semi-cylindrical groove is 3-4mm, 35 test material sections can be installed on the metal base each time, a grinding machine is used for grinding the 35 test material sections for 50min, and the average processing time of a single test material section is about 1.4 min;
if the sampling method is the existing sampling method, the grinding machine processing is changed into linear cutting processing, the other steps are not changed, a wire rod with the diameter of phi 6mm being more than the wire rod diameter being less than or equal to 8mm is taken as an example, the linear cutting length is 6-8mm, the length of a sample segment is 30-35mm, one sample segment can be installed in each processing, and the processing time of each sample segment is 18 min.
The third concrete implementation mode: in the method for sampling the test sample for inspecting the non-metallic inclusions in the wire rod, taking the wire rod with the diameter of phi 8mm being more than the wire rod diameter being less than or equal to 10mm as an example, according to GB/T10561-2005, 3 samples steel rods with the diameter or the side length being less than 25mm, the inspection surface is the whole section passing through the diameter, and the length of the inspection surface is ensured to obtain about 200mm2The inspection area "of (a), therefore, a plurality of 20 to 25mm wire rods are first taken as samples;
then a plurality of samples are placed on a metal base on the electromagnetic chuck, the diameter of the wire rod with the diameter of phi 8mm being more than that of the wire rod with the diameter of less than or equal to 10mm is adopted, and the radius is R3The grinding size of the semi-cylindrical groove is 4-5mm, 40 sample sections can be arranged on the metal base each time, 1h is needed for grinding the 40 sample sections by using a grinding machine, and the average processing time of a single sample section is about 1.5 min;
if the sampling method is the existing sampling method, the grinding machine processing is changed into linear cutting processing, the other steps are not changed, a wire rod with the diameter of phi 8mm being more than the wire rod diameter being less than or equal to 10mm is taken as an example, the linear cutting length is 8-10mm, the length of a sample segment is 25-30mm, one sample segment can be installed in each processing, and the processing time of each sample segment is 18 min.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the inventive concept of the present invention, and any obvious alternatives are within the scope of the present invention.
Claims (8)
1. A sampling method of a sample for inspecting non-metallic inclusions in a wire rod is characterized by comprising the following steps of:
the method comprises the following steps: sampling the material section, cutting a sample with the length of 20-40 mm in the longitudinal direction on the material section to ensure that the inspection area of the sample section is 190-210 mm2；
Step two: the design is used for placing the metal base of the test material section, three semi-cylindrical grooves with different radiuses are arranged on the metal base, and the radiuses of the semi-cylindrical grooves are R respectively1、R2And R3，R1＜R2＜R3The three semi-cylindrical grooves with different radiuses are in a group, and a plurality of groups of semi-cylindrical grooves are arrayed on the metal base;
step three: placing the sample section in a semi-cylindrical groove of a metal base, placing the metal base on an electromagnetic chuck of a plane grinder, fixing the sample section on the plane grinder, grinding the sample section, and grinding the sample section with the same specification each time;
step four: inlaying the ground test material section in a hot inlaying mode, wherein the inlaying diameter is 25-45 mm;
step five: manually grinding the embedded test material section, and grinding off the surface deformation layer of the test sample until the surface of the test sample is flat;
step six: and cleaning the ground sample, and drying the cleaned sample by blowing to obtain a metallographic specimen for inspecting nonmetallic inclusions.
2. The method for sampling the test specimen for inspecting the nonmetallic inclusions in the wire rod as set forth in claim 1, wherein the sampling in the first step is specifically as follows:
when the diameter of the sample section is more than or equal to phi 10mm, the length of the sample section is 20 mm;
when the diameter of the sample section is less than phi 10mm and less than phi 8mm, the length of the sample section is 25 mm;
when the diameter of the sample section is less than phi 8mm and less than phi 7mm, the length of the sample section is 30 mm;
when the diameter of the sample section is less than phi 7mm and less than phi 6mm, the length of the sample section is 35 mm;
when the diameter of the sample section is less than phi 6mm and less than phi 5mm, the length of the sample section is 40 mm.
3. The method for sampling the wire rod non-metallic inclusion inspection sample according to claim 2, wherein the design of the metal base in the second step is as follows:
the metal base is made of GCr15, the length of the metal base is L, L is 300mm, the width is W, W is 200mm, the height is H, H is 10mm, and the metal base is provided with a semi-cylindrical groove R1＝2mm，R2＝3mm，R3＝4mm, radius R1Has a semi-cylindrical groove with a radius of R2Has a radius of R, and the distance between the semi-cylindrical grooves is S1, S1 is 5mm2Has a semi-cylindrical groove with a radius of R3The distance between the semi-cylindrical grooves is S2, S2 is 8mm, the distance between two adjacent groups of semi-cylindrical grooves is S3, S3 is 8mm, the distance between the grooves on two sides of the metal base is S4, and S4 is 6.5 mm.
4. The method for sampling the test sample for inspecting the nonmetallic inclusions in the wire rod as set forth in claim 3, wherein in the third step, the method specifically comprises:
the radius of the sample section with the diameter of phi 5.5mm to phi 6mm is R1The grinding size of the grinding machine is 2.75mm-3 mm;
the radius of the sample section with the diameter of phi 6mm less than that of the sample section and the diameter of phi 8mm less than that of the sample section is R2The grinding size of the grinding machine is 3mm-4 mm;
the radius of the sample section with the diameter of phi 8mm < the sample section diameter of phi 10mm is R3The grinding size of the grinding machine is 4mm-5 mm.
5. The method for sampling a test specimen for inspecting non-metallic inclusions in a wire rod according to claim 1 or 4, wherein: and the surface grinding machine in the third step adopts an M7130 surface grinding machine.
6. The method for sampling the test specimen for inspecting the nonmetallic inclusions in the wire rod as claimed in claim 1, wherein the step five is to grind the test specimen section, and specifically comprises the following steps:
the pre-grinding machine adopts an M-2 metallographic sample pre-grinding machine, and the grinding and polishing machine is a MoPao260 metallographic sample grinding and polishing machine;
(1) carrying out coarse grinding on the sample by using No. 240 metallographic waterproof abrasive paper, wherein the grinding depth is 0.4-0.6 mm;
(2) grinding a sample by using No. 600 metallographic waterproof abrasive paper, wherein the grinding depth is 0.2-0.35 mm;
(3) grinding a sample by using 1200# metallographic waterproof abrasive paper, wherein the thickness of the ground sample is 0.005-0.007 mm;
(4) polishing the sample on a canvas fabric by adopting a 7-micron diamond polishing agent for 3-5 min;
(5) and polishing the sample on the wool fabric by adopting a diamond polishing agent with the diameter of 2.5 mu m for 2-3 min.
7. The method for sampling the test specimen for inspecting the nonmetallic inclusions in the wire rod as claimed in claim 1, wherein the cleaning of the sample in the sixth step is specifically as follows: and cleaning the sample by using clean water and absolute ethyl alcohol in sequence, and drying the cleaned sample by blowing in one direction.
8. The method for sampling the test sample for inspecting the nonmetallic inclusions in the wire rod as set forth in claim 1, wherein the thermal inlaying manner of the sample section in the fourth step is specifically as follows:
(1) using an ATM Opal X-Press type mosaic machine, turning on a power supply of the mosaic machine, switching on a circuit and turning on the power supply to enable a water circulation system to normally operate;
(2) placing the test surface of the test section on a piston of an embedding machine downwards, operating the embedding machine to enable the piston to fall down, pouring resin embedding material, changing a mold sealing cover, and beginning to embed the test section;
(3) after the inlaying is finished, waiting for the cooling of the inlaying machine, opening the mould cover of the inlaying machine, automatically lifting the piston, and taking out the test material section.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110637446.5A CN113358450A (en) | 2021-06-08 | 2021-06-08 | Sampling method of wire rod non-metallic inclusion inspection sample |
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| CN202110637446.5A CN113358450A (en) | 2021-06-08 | 2021-06-08 | Sampling method of wire rod non-metallic inclusion inspection sample |
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