CN108036993B - Method for detecting whether frosting occurs or not after stainless steel polishing - Google Patents
Method for detecting whether frosting occurs or not after stainless steel polishing Download PDFInfo
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- CN108036993B CN108036993B CN201711184664.8A CN201711184664A CN108036993B CN 108036993 B CN108036993 B CN 108036993B CN 201711184664 A CN201711184664 A CN 201711184664A CN 108036993 B CN108036993 B CN 108036993B
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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
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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
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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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
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N21/57—Measuring gloss
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8803—Visual inspection
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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
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2866—Grinding or homogeneising
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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
- G01N2001/364—Embedding or analogous mounting of samples using resins, epoxy
-
- 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
Abstract
The invention relates to a method for detecting whether frosting occurs or not after stainless steel polishing, which comprises the following steps: taking a plurality of length samples on a steel belt, and selecting left, middle and right 3 positions on the samples for sampling; cutting three samples into square samples, and horizontally placing the square samples at the bottom of a cold-inlaid grinding tool; according to two proportions of the liquid curing agent and the resin of the cold-inlaid sample, the proportion is 1: 2, respectively taking 5mL and 10mL, then mixing the two liquids, slowly stirring for 2min in a clockwise direction, pouring into a cold-inlaid grinding tool, standing for 1 hour, and taking out the inlaid sample after the inlaid sample is hardened; placing the embedded sample on a full-automatic metallographic polishing machine for grinding; polishing the inlaid sample after grinding; opening the full-automatic grinding and polishing machine, flushing water without loading a sample, lightly brushing the polishing cloth by using a plastic brush, and cleaning the polishing cloth; taking out a metallographic phase; the surface is inspected.
Description
Technical Field
The invention belongs to the technical field of detecting whether a material is frosted, and particularly relates to a method for detecting whether the stainless steel is frosted or not after being polished.
Background
There is a market demand for stainless steel finishes, which are used for appearance trim after finishing. The application has high requirements on materials, only a small part of the materials can meet the requirements, and most of the materials can show various defects such as pits, pinholes, impurity lines and the like after being polished.
In current practice, there is no effective means to check whether stainless steel materials are suitable for polishing use before feeding. Customer authentication methods are often used: that is, the supplier first charges the materials to the specification required by the customer, and then lets the customer try polishing, and determines whether the materials can be used for polishing purpose from the polishing result. Such a waste of cost, an improperly polished material is produced; time is wasted, once the previous materials are not suitable, the materials need to be fed again for production, and the delivery time is prolonged; the production rhythm is disturbed, the material is not suitable for the production of a steel mill needing queue insertion, and the client faces the risk of material breakage.
Disclosure of Invention
The invention aims to provide a method for detecting whether the stainless steel is frosted or not after polishing, which can discriminate whether the material is suitable for polishing purpose or not before feeding, thereby reducing unnecessary production waste, lowering cost, reducing the risk of material breakage of customers, improving customer satisfaction and solving the problem of detecting whether the material is frosted or not.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method for detecting whether the stainless steel is frosted or not after being polished is provided, and comprises the following steps:
(a) taking a sample with a certain length on a steel belt, and selecting left, middle and right 3 positions on the sample for sampling;
(b) cutting three samples into square samples, and horizontally placing the square samples at the bottom of a cold-inlaid grinding tool;
(c) according to two proportions of the liquid curing agent and the resin of the cold-inlaid sample, the proportion is 1: 2, respectively taking 5mL and 10mL, then mixing the two liquids, slowly stirring for 2min in a clockwise direction, pouring into a cold-inlaid grinding tool, standing, and taking out the inlaid sample after the inlaid sample is hardened;
(d) placing the embedded sample on a full-automatic metallographic polishing machine for grinding, and controlling the pressure to be 3.5kg/cm2；
(e) Polishing the inlaid sample after grinding, changing a velvet cloth with a colloidal metallographic polishing fabric with the diameter of 250mm in the polishing process, lubricating the velvet cloth with the colloidal metallographic polishing fabric with water, and then using an automatic polishing dripper with the dripping speed of 15 drops/min and using 1.5 mu m diamond suspension polishing solution as polishing solution; the grinding head rotates at a clockwise speed of 70r/min, the lower disc rotates at a counterclockwise speed of 300r/min for polishing for 5 minutes, then the polishing solution is stopped, polishing is finished for 10 minutes, the surface is inspected, and the metallographic surface is inspected to have obvious impurities;
(f) opening the full-automatic grinding and polishing machine, flushing water without loading a sample, lightly brushing the polishing cloth by using a plastic brush, and cleaning the polishing cloth;
(g) using an automatic polishing dropping liquid device, wherein the dropping speed is 15 drops/min, and the polishing liquid is 1.5 mu m diamond suspension polishing liquid; ensuring that the grinding head rotates at 70r/min clockwise, the lower disc rotates at 300r/min clockwise, and the polishing is carried out for 5 minutes, stopping polishing liquid, and finishing polishing for 15 minutes;
(h) taking out the metallographic phase, extruding about 10ml of liquid soap into a hand, coating the liquid soap on the surface of the metallographic phase after foaming, washing for 15-25s, washing with water, aligning with a blower port, inclining for about 25-35 degrees, and drying by blowing;
(i) the surface is inspected.
According to a further technical scheme, in the step (a), the width of the steel strip is 1200mm, the length of the sample is 600mm, and the sampling positions on the left side and the right side are 300mm away from the edge part.
According to a further technical scheme, in the step (b), the specifications of the three samples are respectively 20-20 mm, the rolling directions are respectively marked on the back surfaces of the three samples, and the cold embedding die is circular rubber with the diameter of 30 mm.
According to a further technical scheme, in the step (d), 180# metallographic special abrasive paper is used as the first abrasive paper during grinding, the grinding time is 4min, the clockwise rotation speed of a grinding head is 70r/min, the counterclockwise rotation speed of a lower disc is 300r/min, and a proper amount of flushing water is kept in the grinding process; and then grinding by using special sand paper for metallographic phase of No. 400, No. 600, No. 800 and No. 1000 respectively for 2min, wherein the clockwise rotation speed of the grinding head is 70r/min, the anticlockwise rotation speed of the lower disc is 300r/min, and a proper amount of flushing water is kept in the grinding process.
In a still further aspect of the present invention, in the step (i), the method for inspecting a surface includes the steps of:
(1) firstly, directly observing by using eyes to detect whether the surface of the material has obvious defects;
(2) using a strong light flashlight to aim at the surface of the sample, and checking whether the surface of the sample has obvious pit inclusion conditions;
(3) and (3) detecting the glossiness of the material: and judging whether the material is qualified or not by detecting the 60-degree glossiness of the material in the transverse rolling direction.
In a further aspect of the present invention, in the step (1), the defect is linear and parallel to the rolling direction.
According to a further technical scheme of the invention, in the step (3), when the glossiness is greater than 450, the surface defect of the sample is less, the material is judged to be qualified, when the glossiness is 350-450, the material is judged to be not good, and when the glossiness is less than 350, the surface defect of the sample is large, and the material is judged to be unqualified.
Advantageous effects
The method quantitatively detects whether the material is frosted by using a glossiness instrument, the detection result is accurate, and after the detection according to the method, when the glossiness is more than 450, the material is produced to the specification of a client, the qualified proportion of the trial of the client is up to 90 percent, namely, after the polishing detection, whether the material is suitable for polishing can be discriminated at the raw material stage, so that the raw material is fed and produced after being qualified through the detection, the unnecessary production waste is reduced, the production is not blind, and the production qualified rate is increased; meanwhile, the risk of material failure of customers is reduced, and the customer satisfaction is improved.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Example 1
A method for detecting whether frosting occurs or not after stainless steel polishing comprises the following steps:
(1) taking a 600 mm-long sample on a 1200 mm-wide steel belt, selecting left, middle and right 3 positions on the sample, and sampling, wherein the distance between the left side and the right side is 300mm from the edge;
(2) cutting three samples into 20 × 20mm square samples, horizontally placing the samples into the bottom of a cold-inlaid grinding tool, wherein the cold-inlaid grinding tool is circular rubber with the diameter of 30mm, and marking the rolling direction on the back of the samples;
(3) according to two proportions of the liquid curing agent and the resin of the cold-inlaid sample, the proportion is 1: 2, respectively taking 5mL and 10mL, then mixing the two liquids, slowly stirring for 2min in a clockwise direction, reducing bubbles as much as possible in the stirring process, then pouring into a cold-inlaid grinding tool, standing for 1 hour, and taking out the inlaid sample after the inlaid sample is hardened;
(4) on a full-automatic metallographic grinding and polishing machine, the pressure is controlled to be 3.5kg/cm2: the first sand paper uses 180# special sand paper for metallographic phase, the grinding time is 4min, the clockwise rotating speed of a grinding head is 70r/min, the anticlockwise rotating speed of a lower disc is 300r/min, a proper amount of water is kept in the grinding process, the grinding is performed to ensure a certain cutting amount, then the special sand paper for metallographic phase of 400#, 600#, 800#, 1000# is respectively used for grinding, each grinding step is 2min, the clockwise rotating speed of the grinding head is 70r/min, the anticlockwise rotating speed of the lower disc is 300r/min, and a proper amount of water is kept in the grinding process;
(5) after the grinding is finished, polishing is needed, the polishing process is changed to a velvet cloth with a diameter of 250mm and a metallographic polishing fabric, the velvet cloth is lubricated by proper amount of water, water is cut off, an automatic polishing liquid dropping device is used, and the dropping speed is increased: about 15 drops/min, 1.5 μm diamond suspension slurry using polishing solution; the polishing of the grinding head at a clockwise rotation speed of 70r/min and the lower disc at a counterclockwise rotation speed of 300r/min is carried out for 5 minutes, then the polishing solution is stopped, the polishing is finished for 10 minutes, the surface is inspected, and the metallographic surface is inspected to have obvious impurities;
(6) opening the full-automatic grinding and polishing machine, flushing water without loading a sample, lightly brushing the polishing cloth by using a plastic brush, and cleaning the polishing cloth;
(7) with the automatic polishing dripper, dripping speed: about 15 drops/min, 1.5 μm diamond suspension slurry using polishing solution; the polishing time is still ensured to be 70r/min of the clockwise rotation speed of the grinding head, the lower disc is polished for 5 minutes at 300r/min of the clockwise rotation speed, then the polishing solution is stopped, and the polishing is finished for 15 minutes;
(8) taking the rubber gloves, taking out the metallographic phase, extruding about 10ml of liquid soap into the hands, coating the liquid soap on the surface of the metallographic phase after foaming, washing for about 15-25s, washing with water, aligning with a blower port, inclining for about 25-35 degrees, and drying by blowing;
(9) inspecting the surface:
at the moment, in a light good environment, eyes are used for direct observation to see whether obvious defects exist on the surface of the material, the defects are generally linear and parallel to the rolling direction, and the defects are essentially different from scratches generated by grinding;
then, a strong light flashlight (the current model is SMALL S M little sun-T650) is used for adjusting to X1, the light gathering state is aligned to the surface of the sample, and thus the surface pit condition can be seen, and the condition that obvious pits are mixed can be seen;
detecting the glossiness of the material, specifically judging the material by detecting the transverse rolling direction of the material and the glossiness of 60 degrees, and judging the material to be qualified when the glossiness is more than 450 and the surface defects of the sample are few; the glossiness is between 350 and 450, the material is judged to be poor, and the material feeding production is not recommended unless the material is short; when the glossiness is less than 350, the sample surface defect is large, and the material is judged to be unqualified.
Claims (7)
1. A detection method for detecting whether frosting occurs after stainless steel polishing is characterized by comprising the following steps: the method comprises the following steps:
(a) taking a sample on a steel belt, and selecting a left position, a middle position and a right position on the sample for sampling;
(b) cutting three samples into square samples, and horizontally placing the square samples at the bottom of a cold-inlaid grinding tool;
(c) according to two proportions of the liquid curing agent and the resin of the cold-inlaid sample, the proportion is 1: 2, respectively taking 5mL and 10mL, then mixing the two liquids, slowly stirring for 2min in a clockwise direction, pouring into a cold-inlaid grinding tool, standing, and taking out the inlaid sample after the inlaid sample is hardened;
(d) placing the mosaic sample inGrinding on a full-automatic metallographic grinding and polishing machine, and controlling the pressure to be 3.5kg/cm2；
(e) Polishing the inlaid sample after grinding, changing a velvet cloth with a colloidal metallographic polishing fabric with the diameter of 250mm in the polishing process, lubricating the velvet cloth with the colloidal metallographic polishing fabric with water, and then using an automatic polishing dripper with the dripping speed of 15 drops/min and using 1.5 mu m diamond suspension polishing solution as polishing solution; the grinding head rotates at a clockwise speed of 70r/min, the lower disc rotates at a counterclockwise speed of 300r/min for polishing for 5 minutes, then the polishing solution is stopped, polishing is finished for 10 minutes, the surface is inspected, and the metallographic surface is inspected to have obvious impurities;
(f) opening the full-automatic grinding and polishing machine, flushing water without loading a sample, lightly brushing the polishing cloth by using a plastic brush, and cleaning the polishing cloth;
(g) using an automatic polishing dropping liquid device, wherein the dropping speed is 15 drops/min, and the polishing liquid is 1.5 mu m diamond suspension polishing liquid; ensuring that the grinding head rotates at 70r/min clockwise, the lower disc rotates at 300r/min clockwise, polishing for 5 minutes, stopping polishing liquid, and polishing for 15 minutes;
(h) taking out the metallographic phase, extruding 10ml of liquid soap into a hand, coating the liquid soap on the surface of the metallographic phase after foaming, washing for 15-25s, washing with water, aligning with a blower port, inclining for 20-35 degrees, and drying by blowing;
(i) the surface is inspected.
2. The method for detecting whether the stainless steel is frosted or not after being polished according to claim 1, wherein the method comprises the following steps: in the step (a), the width of the steel strip is 1200mm, the length of the sample is 600mm, and the sampling positions on the left side and the right side are 300mm away from the edge.
3. The method for detecting whether the stainless steel is frosted or not after being polished according to claim 1, wherein the method comprises the following steps: in the step (b), the specifications of the three samples are respectively 20 x 20mm, the rolling directions are respectively marked on the back surfaces of the three samples, and the cold-inlaid die is circular rubber with the diameter of 30 mm.
4. The method for detecting whether the stainless steel is frosted or not after being polished according to claim 1, wherein the method comprises the following steps: in the step (d), 180# metallographic special abrasive paper is used as the first abrasive paper during grinding, the grinding time is 4min, the clockwise rotation speed of a grinding head is 70r/min, the anticlockwise rotation speed of a lower disc is 300r/min, and a proper amount of flushing water is kept in the grinding process; and then grinding by using special sand paper for metallographic phase of No. 400, No. 600, No. 800 and No. 1000 respectively for 2min, wherein the clockwise rotation speed of the grinding head is 70r/min, the anticlockwise rotation speed of the lower disc is 300r/min, and a proper amount of flushing water is kept in the grinding process.
5. The method for detecting whether the stainless steel is frosted or not after being polished according to claim 1, wherein the method comprises the following steps: in the step (i), the surface inspection method comprises the steps of:
(1) firstly, directly observing by using eyes to detect whether the surface of the material has obvious defects;
(2) using a strong light flashlight to aim at the surface of the sample, and checking whether the surface of the sample has obvious pit inclusion conditions;
(3) and (3) detecting the glossiness of the material: and judging whether the material is qualified or not by detecting the 60-degree glossiness of the material in the transverse rolling direction.
6. The method for detecting whether the stainless steel is frosted or not after being polished according to claim 5, wherein the method comprises the following steps: in the step (1), the defects are linear and parallel to the rolling direction.
7. The method for detecting whether the stainless steel is frosted or not after being polished according to claim 5, wherein the method comprises the following steps: in the step (3), when the glossiness is greater than 450, the surface defect of the sample is less, the material is judged to be qualified, when the glossiness is 350-450, the material is judged to be not good, and when the glossiness is less than 350, the surface defect of the sample is large, and the material is judged to be unqualified.
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| CN109283027B (en) * | 2018-11-05 | 2023-10-13 | 长沙岱勒新材料科技股份有限公司 | Diamond wire metallographic specimen manufacturing device and method |
| CN110779786A (en) * | 2019-11-11 | 2020-02-11 | 长沙黑金刚实业有限公司 | Detection method for internal structure of hard alloy spherical tooth |
| CN114235804A (en) * | 2021-12-16 | 2022-03-25 | 工业和信息化部电子第五研究所华东分所 | Detection method for layering defect of non-sealed device |
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