CN112414810A - Metallographic test method for corrugated pipe blank - Google Patents
Metallographic test method for corrugated pipe blank Download PDFInfo
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- CN112414810A CN112414810A CN202011213867.7A CN202011213867A CN112414810A CN 112414810 A CN112414810 A CN 112414810A CN 202011213867 A CN202011213867 A CN 202011213867A CN 112414810 A CN112414810 A CN 112414810A
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- 238000010998 test method Methods 0.000 title claims abstract description 12
- 238000005498 polishing Methods 0.000 claims abstract description 87
- 238000005260 corrosion Methods 0.000 claims abstract description 62
- 230000007797 corrosion Effects 0.000 claims abstract description 62
- 238000000227 grinding Methods 0.000 claims abstract description 30
- 239000000498 cooling water Substances 0.000 claims abstract description 12
- 238000005406 washing Methods 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims description 91
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 238000012360 testing method Methods 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 244000137852 Petrea volubilis Species 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000005530 etching Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000866 electrolytic etching Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
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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
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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
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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
- G01N1/34—Purifying; Cleaning
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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
- G01N1/36—Embedding or analogous mounting of samples
-
- 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
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
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- General Health & Medical Sciences (AREA)
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- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a metallographic test method of a corrugated pipe blank, which comprises the steps of utilizing a multi-station grinding, polishing and positioning and forming device of the corrugated pipe blank to position and form a sample to be tested of the corrugated pipe blank with the thickness of less than 0.5mm, then manually polishing by using abrasive paper under the action of cooling water, then mechanically polishing, cleaning, washing the surface of the sample to be tested by using absolute ethyl alcohol, and drying by using an air duct; and immersing the polished surface of the sample to be detected into a corrosive solution through a multi-station corrosion device for corrosion until a qualified metallographic structure picture is corroded. The invention has the advantages of convenient forming: the sample to be detected does not need to be embedded and stuck, the forming is convenient, and the efficiency is high; the integral grinding, polishing and disassembling are simple; the disassembly is convenient, and the flatness of the polished surface cannot be influenced; the operation is simple and safe, a plurality of samples to be detected are corroded simultaneously, and the efficiency is improved; the position of the sample to be detected in the corrosive solution can be adjusted at will, and the device has the advantages of controllable speed, convenience, rapidness and the like.
Description
Technical Field
The invention relates to the technical field of metallographic test of corrugated pipe materials, in particular to a metallographic test method of a corrugated pipe blank, which relates to the technical field of microelectronics.
Background
Metallographic testing of materials is an important test for raw material detection, and is the most common way to examine the microstructure and grain size of materials. The metallographic examination is taken as an important means for judging the performance of raw materials, is widely applied to the fields of aerospace, petrochemical industry, energy and power, ships, oceans and the like, provides important microscopic criteria for selection and application of raw materials in various industries, and is equipped with metallographic examination capability in advanced physicochemical laboratories in China and China. In practice, particularly, the metallographic test of the corrugated pipe blank with the thickness less than 0.5mm is complex in process and difficult. The grinding, polishing and corrosion of the metallographic examination of corrugated pipe blanks (hereinafter collectively referred to as samples to be examined) smaller than 0.5mm have the following defects at present:
1. the sample to be detected cannot be held by a hand to be ground and polished on a grinding and polishing machine, and needs to be inlaid or adhered to the surface of a flat metal block for grinding and polishing;
2. the inlaid powder material generally adopts phenolic resin, and electrolytic corrosion cannot be carried out after the inlaying; the sample to be examined, which is stuck to the metal block, cannot be electrolytically corroded due to the glue. If the sample to be detected is forcibly taken down from the mosaic sample or the metal block, the polished surface of the sample to be detected is deformed or damaged, and the subsequent metallographic effect is influenced;
3. the common electrolytic etching device is that an etching solution is put in a beaker, a sample placing device with a hole is arranged on the upper layer of the solution, and the grinding and polishing surface of a sample to be detected is contacted with the solution through the hole. Because the sample to be detected is too small and too light, the sample to be detected is particularly easy to move after contacting the solution, and is not beneficial to the development of a corrosion test;
4. the common electrolytic corrosion test can only carry out the corrosion of a single sample to be detected each time, the time progress is slow, and the corrosion efficiency is low;
5. the safety protection performance of the common electrolytic corrosion device is poor: firstly, when a sample to be detected is placed on a placing table and taken in a corrosive solution, the problems of overflow, splashing and the like of the corrosive solution are very easy to occur; secondly, vessels containing corrosive solution are corroded without fixing devices; and thirdly, after the corrosion test is finished, the solution in the vessel needs to be poured out, so that certain danger is caused.
Disclosure of Invention
In view of the above technical problems, the present invention aims to provide a metallographic test method for a corrugated pipe blank. The invention particularly relates to a metallographic process method for positioning, molding, grinding and polishing and multi-station corrosion of a corrugated pipe blank with the thickness of less than 0.5 mm.
In order to achieve the purpose, the invention adopts the technical scheme that:
a metallographic test method for a corrugated pipe blank comprises the following steps:
and a positioning and forming stage: placing a sample to be detected into a lofting seam of a multi-station grinding and polishing positioning forming device of a corrugated pipe blank, slowly adjusting a rotary handle until a pressure head is just attached to the sample to be detected, observing the compression mold state of the sample to be detected, adjusting a compression mold screw to compact the sample to be detected to a compression mold groove, gradually screwing loose head compression screws on two sides of the sample to be detected, loosening and disassembling a pressing plate screw of a fixed base plate and a base screw of a fixed base, and taking down the fixed base plate and the upper pressing plate together to grind and polish the sample to be detected;
demolding, grinding and polishing: the method comprises the following steps of mechanically polishing a sample to be detected, selecting P600, P800, P1000 or/and P1200 abrasive paper for polishing, opening a button of equipment after the abrasive paper with a fixed mesh number is placed before polishing, starting the equipment to operate, picking up the sample to be detected after positioning and forming, gently placing the sample to be detected at 1/3 from the outer diameter edge of the abrasive paper to the circle center direction, fixing the sample to be detected, then not allowing the polishing direction of the sample to be detected to be randomly rotated, opening cooling water, and timely washing abrasive dust and sundries; selecting the sand paper for polishing, wherein the polishing time is about 1min, observing the surface of a sample to be detected, and replacing the sand paper with the next mesh number on the premise of good flatness and consistent scratches; after the next mesh of abrasive paper is replaced, a grinding and polishing machine with cooling water is used, the polishing direction of a new round needs to be vertical to the scratch direction of the previous round, and the new abrasive paper can not be replaced until all scratches of the previous round are ground off;
mechanically polishing a sample to be detected: cleaning polishing flannelette, putting the flannelette on a polishing disc for fixing, smearing polishing paste or spraying polishing agent at the position 1/3 from the outer diameter edge of the polishing disc to the circle center direction, turning on a device switch, putting a polished sample to be detected on the polishing paste or the polishing agent, and slightly shaking in the direction vertical to the final polished scratch direction; after polishing for about 30s, opening small-flow cooling water, continuing polishing until the surface of the sample to be detected is bright and has no scratch, increasing the flow of the cooling water, and simultaneously polishing and cleaning; washing, washing the surface of a sample to be detected by absolute ethyl alcohol, and drying by an air duct for later use;
multi-station corrosion stage: selecting a corrosion solution according to a sample to be polished, placing a corrosion-resistant tank containing the corrosion solution on a fixed base through a multi-station corrosion device, and adjusting the position of a stainless steel iron plate; unloading the grinded and polished sample to be detected from the upper pressing plate and the lower pressing plate, fixing the non-grinded and polished surfaces of different samples to be detected through the hexagon socket head cap screws at the sample clamping ends, clamping the sample to be detected, and controlling the lifting speed through opening the hydraulic cylinder and the telescopic mechanism to enable the grinded and polished surfaces of the samples to be detected to be slowly and completely immersed in the corrosive solution;
setting corrosion test parameters: taking a sample to be detected as an anode and an iron plate in the solution as a cathode, determining voltage and corrosion time, setting and adjusting, and connecting a power supply to start a corrosion test; in the test process, finely adjusting voltage or corrosion time until a qualified metallographic structure picture is corroded;
above-mentioned bellows pipe's many merit position grinds throws location forming device, it includes: the device comprises a base, a pressing plate and a pressing die screw rod; a lower pressing plate and an upper pressing plate with a through hole at the central part are sequentially arranged on the base, and a pressing die screw with a supporting frame is also arranged on the upper pressing plate; the upper part of the base is provided with a pressing die groove corresponding to the through hole of the upper pressing plate and the lower pressing plate, and the side surface between the lower pressing plate and the upper pressing plate is also provided with a lofting strip-shaped hole for placing a sample to be detected; the moulding-die screw with the supporting frame comprises: the pressing die comprises an arch-shaped support frame fixedly arranged on an upper pressing plate, a pressing die screw rod which is in threaded connection with the arch-shaped support frame and is vertical to the lower pressing plate and the upper pressing plate, a pressing die screw rod pressure head arranged at the lower part of the pressing die screw rod and a rotating handle arranged at the upper part of the pressing die screw rod, wherein the pressing die screw rod pressure head corresponds to through holes of the lower pressing plate and the upper pressing plate and the center part of a pressing die groove on;
the multi-station corrosion device for the corrugated pipe blank comprises: a base with a support frame and a corrosion-resistant groove; the corrosion-resistant tank for containing the corrosive solution is arranged on the base, and an iron plate serving as a cathode is also arranged in the corrosion-resistant tank; the top of the support frame is fixedly provided with a hydraulic cylinder connected with a hydraulic pump station, the hydraulic cylinder is downwards and sequentially connected with a telescopic mechanism, a hanging scaffold and a corroded sample clamping end to be detected, which is in threaded connection with the lower part of the hanging scaffold, and the sample clamping end to be detected corresponds to a corrosion-resistant groove on the lower part of the sample clamping end to be detected; an anode is fixedly connected on the metal hanging scaffold.
The invention has the following advantages:
1. the forming is convenient: the sample to be detected does not need to be embedded and stuck, the forming is convenient, and the efficiency is high;
2. the whole grinding, polishing and disassembling are simple: the sample to be detected can be connected with a pressing plate for integral grinding and polishing after being formed, and the sample to be detected is convenient to hold by hands; the sample to be detected is fixed by the loose head compression screw, so that the disassembly is convenient, and the flatness of the polished surface cannot be influenced;
3. high corrosion efficiency and good safety performance: after the sample to be detected is ground and polished, the sample to be detected can be connected through the socket head cap screws at the clamping position of the sample to be detected of the corrosion device, the operation is simple and safe, the simultaneous corrosion of a plurality of samples to be detected is realized, and the efficiency is improved;
4. the position of the sample to be detected is automatically controllable: the position of the sample to be detected in the corrosive solution can be adjusted at will, and the speed is controllable, convenient and fast.
Drawings
FIG. 1 is a schematic partial cross-sectional view of a polishing structure of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic diagram of a corrosion resistant structure of the present invention;
fig. 4 is a side view of fig. 3 of the present invention.
Description of the main components in the drawings: 1 is a rotating handle; 2 is a pressing die screw rod; 3 is an arch-shaped support frame; 4 is a pressing die screw pressure head; 5 is an upper pressure plate; 6 is a lofting strip-shaped hole; 7 is a lower pressing plate; 8 is a pressing die groove; 9 is a base; 10 is a through hole of a loose head compression screw; 11 is a screw through hole of the pressure plate; 12 is a base screw through hole; 13 is a hydraulic cylinder; 14 is a telescopic mechanism; 15 is an anode; 16 is a hanging scaffold; 17 is a socket head cap screw; 18 is a sample clamping end to be detected; 19 is a supporting frame; 20 is a stainless steel cathode; 21 is a corrosion-resistant groove of a glass vessel; 22 is a corrosion-resistant valve; 23 is a vessel fixing groove; and 24 is a base.
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1 and 2, 9 in the figures is a base, a lower pressing plate 7 and an upper pressing plate 5 with a through hole at the central part are sequentially arranged on the base 9, and a pressing mold screw 2 with an arch-shaped support frame 3 is also arranged on the upper pressing plate 5; a pressing die groove 8 corresponding to the through hole of the upper pressing plate and the lower pressing plate is arranged at the upper part of the base 9, and a lofting strip-shaped hole 6 for placing a sample to be detected is also arranged on the side surface between the lower pressing plate 7 and the upper pressing plate 5; the moulding-die screw rod with the arch-shaped supporting frame comprises: the device comprises an arch-shaped support frame 3 fixedly arranged on an upper pressure plate 5, a pressing die screw rod 2 which is in threaded connection with the arch-shaped support frame 3 and is vertical to a lower pressure plate 7 and the upper pressure plate 5, a pressing die screw rod pressure head 4 arranged at the lower part of the pressing die screw rod and a rotating handle 1 arranged at the upper part of the pressing die screw rod, wherein the pressing die screw rod pressure head 4 corresponds to through holes of the lower pressure plate and the upper pressure plate and the center part of a pressing die groove 8 on a base.
The upper pressure plate is also symmetrically provided with movable head compression screw through holes 10; and a pressing plate screw through hole 11 is symmetrically arranged between the upper pressing plate and the lower pressing plate, and a base screw through hole 12 is symmetrically arranged between the upper pressing plate and the lower pressing plate and the base.
As shown in fig. 3 and 4, 24 in the figure is a base with a support frame 19, 21 is a corrosion-resistant tank of a glass ware, the corrosion-resistant tank 21 for containing a corrosive solution is arranged on a ware fixing groove 23, and a stainless steel cathode 20 is also arranged in the corrosion-resistant tank; a hydraulic cylinder 13 connected with a hydraulic pump station is fixedly arranged at the top of the supporting frame 19, the hydraulic cylinder 13 is downwards connected with a piston rod of the hydraulic cylinder in sequence with a telescopic mechanism 14, a hanging scaffold 16 and a corroded sample clamping end 18 which is connected with the lower part of the hanging scaffold through a hexagon socket head cap screw 17 in a threaded manner, and the sample clamping end 18 to be detected corresponds to a corrosion-resistant groove 21 at the lower part of the sample clamping end 18; an anode 15 is also fixedly connected to the metal hanging scaffold. A corrosion-resistant valve 22 is also arranged at the lateral lower part of the corrosion-resistant tank.
Metallographic test procedure
And a positioning and forming stage: the sample to be detected is placed into a lofting strip-shaped hole 6 of the positioning, forming, grinding and polishing device, the rotating handle 1 is slowly adjusted until a pressing die screw pressure head 4 is just attached to the sample to be detected, the pressing die state of the sample to be detected is observed while the pressing die screw 2 is adjusted to compact the sample to be detected to a pressing die groove 8, loose head compression screws 10 on two sides of the sample to be detected are gradually screwed, a pressing plate screw 11 of a fixing base plate and a base screw 12 of the fixing base are loosened and disassembled, and the loose head compression screws and the base screws are taken down together with an upper pressing plate 5 to prepare for grinding.
Demolding, grinding and polishing:
mechanically polishing a sample to be detected: considering that the sample to be detected is very thin and has very high surface smoothness, sand paper of P600, P800, P1000 and P1200 is selected for polishing in sequence.
Firstly, before polishing, the safety condition of the polishing machine needs to be checked, and after the sand paper with a fixed mesh number is put on a sand paper wheel disc of the polishing machine (P600).
And secondly, turning on a button of the polishing machine, starting the polishing machine to operate, holding the positioned and molded sample to be detected by hand, lightly placing the sample to be detected at 1/3 from the outer diameter edge of the abrasive paper to the circle center direction, fixing the sample to be detected, then not allowing the polishing direction of the sample to be detected to be randomly rotated, turning on a cooling water switch of the polishing machine, and timely washing abrasive dust and sundries.
And thirdly, polishing for about 1min, observing the surface of the sample to be detected, and replacing the sand paper with the next mesh number on the premise of good flatness and consistent scratch, otherwise, continuing polishing.
And fourthly, after the next mesh of abrasive paper on the abrasive paper wheel disc of the polishing machine is replaced, the sample is rotated by 90 degrees, the direction of the new grinding mark is perpendicular to the direction of the old grinding mark, so that the elimination condition of the coarse grinding mark is easy to observe, and the abrasive paper with a finer mesh is replaced after the old grinding mark is completely ground.
Mechanically polishing a sample to be detected:
cleaning polishing flannelette, putting the flannelette on a polishing disc of a grinding and polishing machine, fixing the flannelette, and smearing polishing paste or spraying polishing agent at the position 1/3 from the outer diameter edge of the polishing disc to the circle center.
And secondly, opening the grinding and polishing machine, placing the polished sample to be detected at the polishing paste or polishing agent, and slightly shaking the sample to be detected in a direction vertical to the scratch direction of final polishing.
And thirdly, after polishing for about 30s, opening cooling water (small flow) of the polishing machine, continuing polishing until the surface of the sample to be detected is bright and has no scratch, increasing the flow of the cooling water, and simultaneously polishing and cleaning.
And fourthly, after the cleaning is finished, washing the surface of the sample to be detected again by using absolute ethyl alcohol, and drying by using an air duct.
Note that:
firstly, polishing and flattening edges and corners of a sample to be detected so as to prevent sand paper from being scraped and the sample to be detected from flying out to hurt people;
secondly, when the sample to be detected is held by hands and the sample to be detected is ground and polished, the force needs to be moderate, the grinding efficiency is lower when the pressure is too small,
if the pressure is too large, rolling between abrasive particles and a grinding surface is increased to generate too deep scratches, so that subsequent grinding and polishing work is influenced, and in addition, the surface of a sample to be detected is overheated to generate a deformation layer due to large force;
once the sand grains of the sand paper become dull, the grinding effect is reduced, and the sand grains should be replaced in time, otherwise, the grinding grains and the wiping surface generate a rolling phenomenon to increase a surface disturbed layer.
Polishing time should not be too long, otherwise surface contamination will affect the metallographic effect.
Multi-station corrosion stage:
preparing an etching device: and (4) according to the following table, proportioning the corrosion solution according to the material and detection requirements. Solution proportioning is carried out according to the following table 1 and detection requirements, the corrosion-resistant groove 21 for containing the corrosive solution is placed on the vessel fixing groove 23, and the position of the stainless steel iron plate 20 is adjusted.
The sample to be detected is disassembled and adjusted: and the polished sample to be detected is detached from the upper pressing plate 5 and the lower pressing plate 7, and the detachment process does not allow brute force to be used, so that the influence on the flatness of the polished surface is avoided. And the non-grinding polishing surface of different samples to be detected is fixed well through the socket head cap screw 17 of the sample clamping end 18, so that the samples to be detected can not fall into corrosive liquid. By opening the hydraulic cylinder 13 and the telescopic mechanism 14, the lifting speed is controlled, so that the polished surface of the sample to be detected is slowly and completely immersed in the corrosive solution.
Setting corrosion test parameters: the sample to be tested is used as an anode, a stainless steel iron plate 20 in the solution is used as a cathode, the voltage and the corrosion time in the following table 1 (the table is the electrolytic corrosion parameter commonly used by the technical personnel) are set and adjusted, and then a power supply is connected, so that the corrosion test can be started. In the test process, the voltage or the corrosion time is finely adjusted according to the actual condition until a qualified metallographic structure picture is corroded.
TABLE 1 list of electrolytic corrosion conditions for different sheet materials
Claims (5)
1. A metallographic test method for a corrugated pipe blank comprises the following steps:
and a positioning and forming stage: placing a sample to be detected into a lofting seam of a multi-station grinding and polishing positioning forming device of a corrugated pipe blank, slowly adjusting a rotary handle until a pressure head is just attached to the sample to be detected, observing the compression mold state of the sample to be detected, adjusting a compression mold screw to compact the sample to be detected to a compression mold groove, gradually screwing loose head compression screws on two sides of the sample to be detected, loosening and disassembling a pressing plate screw of a fixed base plate and a base screw of a fixed base, and taking down the fixed base plate and the upper pressing plate together to grind and polish the sample to be detected;
demolding, grinding and polishing: the method comprises the following steps of mechanically polishing a sample to be detected, selecting P600, P800, P1000 or/and P1200 abrasive paper for polishing, opening a button of equipment after the abrasive paper with a fixed mesh number is placed before polishing, starting the equipment to operate, picking up the sample to be detected after positioning and forming, gently placing the sample to be detected at 1/3 from the outer diameter edge of the abrasive paper to the circle center direction, fixing the sample to be detected, then not allowing the polishing direction of the sample to be detected to be randomly rotated, opening cooling water, and timely washing abrasive dust and sundries; selecting the sand paper for polishing, wherein the polishing time is about 1min, observing the surface of a sample to be detected, and replacing the sand paper with the next mesh number on the premise of good flatness and consistent scratches; after the next mesh of abrasive paper is replaced, a grinding and polishing machine with cooling water is used, the polishing direction of a new round needs to be vertical to the scratch direction of the previous round, and the new abrasive paper can not be replaced until all scratches of the previous round are ground off;
mechanically polishing a sample to be detected: cleaning polishing flannelette, putting the flannelette on a polishing disc for fixing, smearing polishing paste or spraying polishing agent at the position 1/3 from the outer diameter edge of the polishing disc to the circle center direction, turning on a device switch, putting a polished sample to be detected on the polishing paste or the polishing agent, and slightly shaking in the direction vertical to the final polished scratch direction; after polishing for about 30s, opening small-flow cooling water, continuing polishing until the surface of the sample to be detected is bright and has no scratch, increasing the flow of the cooling water, and simultaneously polishing and cleaning; washing, washing the surface of a sample to be detected by absolute ethyl alcohol, and drying by an air duct for later use;
multi-station corrosion stage: selecting a corrosion solution according to a sample to be polished, placing a corrosion-resistant tank containing the corrosion solution on a fixed base through a multi-station corrosion device, and adjusting the position of a stainless steel iron plate; unloading the grinded and polished sample to be detected from the upper pressing plate and the lower pressing plate, fixing the non-grinded and polished surfaces of different samples to be detected through the hexagon socket head cap screws at the sample clamping ends, clamping the sample to be detected, and controlling the lifting speed through opening the hydraulic cylinder and the telescopic mechanism to enable the grinded and polished surfaces of the samples to be detected to be slowly and completely immersed in the corrosive solution;
setting corrosion test parameters: taking a sample to be detected as an anode and an iron plate in the solution as a cathode, determining voltage and corrosion time, setting and adjusting, and connecting a power supply to start a corrosion test; in the test process, finely adjusting voltage or corrosion time until a qualified metallographic structure picture is corroded;
above-mentioned bellows pipe's many merit position grinds throws location forming device, it includes: the device comprises a base, a pressing plate and a pressing die screw rod; a lower pressing plate and an upper pressing plate with a through hole at the central part are sequentially arranged on the base, and a pressing die screw with a supporting frame is also arranged on the upper pressing plate; the upper part of the base is provided with a pressing die groove corresponding to the through hole of the upper pressing plate and the lower pressing plate, and the side surface between the lower pressing plate and the upper pressing plate is also provided with a lofting strip-shaped hole for placing a sample to be detected; the moulding-die screw with the supporting frame comprises: the pressing die comprises an arch-shaped support frame fixedly arranged on an upper pressing plate, a pressing die screw rod which is in threaded connection with the arch-shaped support frame and is vertical to the lower pressing plate and the upper pressing plate, a pressing die screw rod pressure head arranged at the lower part of the pressing die screw rod and a rotating handle arranged at the upper part of the pressing die screw rod, wherein the pressing die screw rod pressure head corresponds to through holes of the lower pressing plate and the upper pressing plate and the center part of a pressing die groove on;
the multi-station corrosion device for the corrugated pipe blank comprises: a base with a support frame and a corrosion-resistant groove; the corrosion-resistant tank for containing the corrosive solution is arranged on the base, and an iron plate serving as a cathode is also arranged in the corrosion-resistant tank; the top of the support frame is fixedly provided with a hydraulic cylinder connected with a hydraulic pump station, the hydraulic cylinder is downwards and sequentially connected with a telescopic mechanism, a hanging scaffold and a corroded sample clamping end to be detected, which is in threaded connection with the lower part of the hanging scaffold, and the sample clamping end to be detected corresponds to a corrosion-resistant groove on the lower part of the sample clamping end to be detected; an anode is fixedly connected on the metal hanging scaffold.
2. The metallographic test method according to claim 1, characterized in that: the upper pressure plate is also symmetrically provided with movable head compression screw through holes.
3. The metallographic test method according to claim 1, characterized in that: and a pressing plate screw through hole is symmetrically arranged between the upper pressing plate and the lower pressing plate.
4. The metallographic test method according to claim 1, characterized in that: base screw through holes are symmetrically arranged between the upper and lower pressing plates and the base.
5. The metallographic test method according to claim 1, characterized in that: and a corrosion-resistant valve is also arranged at the lateral lower part of the corrosion-resistant groove.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103808542A (en) * | 2012-11-10 | 2014-05-21 | 有研亿金新材料股份有限公司 | Method for preparing nickel-platinum alloy metallographic phase sample and displaying sample tissue |
| CN204487355U (en) * | 2015-01-27 | 2015-07-22 | 江西科技学院 | A kind of metallographic specimen clamping device |
| CN206459942U (en) * | 2017-02-28 | 2017-09-01 | 中科京驰（北京）科技有限公司 | A kind of metal corrosion-resistant strength test experimental rig |
| CN206862736U (en) * | 2017-06-29 | 2018-01-09 | 上海华碧检测技术有限公司 | One kind automation etching pit experimental provision |
| KR101889306B1 (en) * | 2017-11-30 | 2018-10-01 | 주식회사 강양에이치티에스 | Method for testing metal corrosion by hydrogen sulfide |
| CN109211771A (en) * | 2018-11-30 | 2019-01-15 | 中国工程物理研究院材料研究所 | A kind of active metal surface corrosion behavior measurement device and method |
| CN110361284A (en) * | 2019-08-02 | 2019-10-22 | 西安交通大学 | A kind of liquid metal cavitation erosion experiment apparatus |
-
2020
- 2020-11-04 CN CN202011213867.7A patent/CN112414810A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103808542A (en) * | 2012-11-10 | 2014-05-21 | 有研亿金新材料股份有限公司 | Method for preparing nickel-platinum alloy metallographic phase sample and displaying sample tissue |
| CN204487355U (en) * | 2015-01-27 | 2015-07-22 | 江西科技学院 | A kind of metallographic specimen clamping device |
| CN206459942U (en) * | 2017-02-28 | 2017-09-01 | 中科京驰（北京）科技有限公司 | A kind of metal corrosion-resistant strength test experimental rig |
| CN206862736U (en) * | 2017-06-29 | 2018-01-09 | 上海华碧检测技术有限公司 | One kind automation etching pit experimental provision |
| KR101889306B1 (en) * | 2017-11-30 | 2018-10-01 | 주식회사 강양에이치티에스 | Method for testing metal corrosion by hydrogen sulfide |
| CN109211771A (en) * | 2018-11-30 | 2019-01-15 | 中国工程物理研究院材料研究所 | A kind of active metal surface corrosion behavior measurement device and method |
| CN110361284A (en) * | 2019-08-02 | 2019-10-22 | 西安交通大学 | A kind of liquid metal cavitation erosion experiment apparatus |
Non-Patent Citations (2)
| Title |
|---|
| 郭峰;: "一种全自动金相磨抛机的设计", 安徽冶金科技职业学院学报, no. 04, 15 October 2018 (2018-10-15) * |
| 顾佳磊;李晓冬;夏侯俊招;: "一种自制的简易现场金相检验电解抛光腐蚀装置", 理化检验(物理分册), no. 08, 8 August 2018 (2018-08-08) * |
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