CN108844962A - A method of for detecting the anti-corrosion steel bearing parts manufacturing deficiency of high nitrogen - Google Patents
A method of for detecting the anti-corrosion steel bearing parts manufacturing deficiency of high nitrogen Download PDFInfo
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- CN108844962A CN108844962A CN201810957045.6A CN201810957045A CN108844962A CN 108844962 A CN108844962 A CN 108844962A CN 201810957045 A CN201810957045 A CN 201810957045A CN 108844962 A CN108844962 A CN 108844962A
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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
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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
- 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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Abstract
A method of for detecting the anti-corrosion steel bearing parts manufacturing deficiency of high nitrogen, it is related to bearing defect detecting technique field, the present invention rinses the → the first brightization → third time flowing cool water rinsing → second brightization → four time flowing cool water rinsing → neutralization → five time flowing cool water rinsing → antirust by the flowing cool water of degreasing → hot water cleaning → flowing cool water rinsing → etch → second, it can be quick, accurately show the anti-corrosion steel bearing parts of high nitrogen in the defects of heat treatment and Grinding Process, the anti-corrosion steel bearing parts surface corrosion of high nitrogen after etch is uniform, it does not corrode, normal color is uniform grey, the strip of grey black or black is presented in grinding burn, foliaceous is dotted, interface is obvious, there is certain direction, i.e. mostly along the direction of processing；It shakes off poverty at carbon as canescence piebald etc..The present invention has been applied in production and processing, avoids bearing failure caused by due to processing quality defect, guarantees bearing finished products service life and security performance, reduces economic loss etc., is suitble to large-scale promotion and application.
Description
Technical field
The present invention relates to bearing defect detecting technique fields, and in particular to one kind is for detecting the anti-corrosion steel bearings zero of high nitrogen
The method of part manufacturing deficiency.
Background technique
Known, the defects of bearing parts is if there is carbon of shaking off poverty, soft spots, burn, grinding crack, is easy to produce in operation
Raw fatigue falls off or fragmentation, to influence the service life and safety of a whole set of bearing.According to the type and purposes of bearing, at present
The general bearing steel of the material selection of domestic bearing parts and special rolling-mill section（Such as high-temperature bearing steel Cr4Mo4V, carburizing steel Cr2Ni2
Mo, stainless steel 9Cr18 etc.）.Because of the difference of bearing parts material composition and corrosion resistance, select different cold pickling formula and
Process shows bearing parts（Inside and outside lasso and rolling element etc.）Carbon of shaking off poverty, soft spots and the mill generated when heat-treatment quenching
Caused by processing the defects of burn, grinding crack.Due to high nitrogen corrosion-resisting steel（40Cr15Mo2VN）Bearing is used for as special steel material
Can part processing still uses for the first time at home, the defect that heat treatment, grinding generate promptly and accurately is shown, to product
Processing quality is monitored, and directly affects the quality of product and using safe.Relevant detection method not yet domestic at present
The bearing parts manufacturing deficiency of such material can be fast and accurately shown simultaneously, it is therefore desirable to invent a kind of new detection side
Method and etching solution fast and accurately show high nitrogen corrosion-resisting steel（40Cr15Mo2VN）Bearing parts surface processed manufacturing deficiency, monitoring
The processing quality of bearing parts guarantees service life and security performance of bearing finished products etc..
Summary of the invention
To overcome deficiency present in background technique, the present invention provides one kind for detecting the anti-corrosion steel bearings zero of high nitrogen
The method of part manufacturing deficiency, the present invention can show the anti-corrosion steel bearing parts of high nitrogen lacking in heat treatment and Grinding Process
It falls into, monitors the processing quality of the anti-corrosion steel product of high nitrogen, guarantee the service life and security performance of bearing finished products.
To realize that goal of the invention as described above, the present invention use technical solution as described below：
A method of for detecting the anti-corrosion steel bearing parts manufacturing deficiency of high nitrogen, specifically comprise the following steps：
The first step, degreasing：
Cleaning solution is prepared first, and the component of the cleaning solution specifically includes following component by weight percentage：
Cleaning agent 4%~5%；
Water 95%~96%；
Then the anti-corrosion steel bearing parts of high nitrogen to be detected is put into prepared cleaning solution and carries out degreasing；
Second step, hot water cleaning：
It takes the next step, in the hot water sufficiently rinses the anti-corrosion steel bearing parts of high nitrogen after degreasing, scavenging period is 30S~300S；
Third step, flowing cool water rinsing：
It takes the next step, the anti-corrosion steel bearing parts of high nitrogen is sufficiently rinsed in the cold water of flowing, rinsing time is 30S~300S；
4th step, etch：
It takes the next step, preparation etching solution, the component of the etching solution specifically include following component by weight percentage first：
Nitric acid 25%~30%；
Hydrochloric acid 10%~15%；
Ferric trichloride 2%~4%；
Water 51%~63%；
Then by the anti-corrosion steel bearing parts etch 1.5min~2.5min in etching solution of high nitrogen；
5th step, second of flowing cool water rinsing：
It takes the next step, the anti-corrosion steel bearing parts of high nitrogen is sufficiently rinsed in the cold water of flowing, rinsing time is 30S~300S；
6th step, the first brightization：
It takes the next step, prepare brightization liquid first, the component of stating clearly liquid specifically includes following component by weight percentage：
Potassium permanganate 3%~5%；
Phosphatase 11 0%~12%；
Water 83%~87%；
Then by the anti-corrosion steel bearing parts of high nitrogen brightization 30S~60S in brightization liquid；
7th step, the rinsing of third time flowing cool water：
It takes the next step, the anti-corrosion steel bearing parts of high nitrogen is sufficiently rinsed in the cold water of flowing, rinsing time is 30S~300S；
8th step, second of brightization：
It takes the next step, prepare secondary brightization liquid first, the component of the secondary brightization liquid specifically includes following component by weight percentage：
Hydrochloric acid solution 99.675%~99.885%；
Metallic tin grain 0.015%~0.025%；
Stannous chloride 0.1%~0.3%；
Then by the anti-corrosion steel bearing parts of high nitrogen in secondary brightization liquid brightization 30S~60S；
9th step, the 4th flowing cool water rinsing：
It takes the next step, the anti-corrosion steel bearing parts of high nitrogen is sufficiently rinsed in the cold water of flowing, rinsing time is 30S~300S；
Tenth step neutralizes：
It takes the next step, preparation neutralizer, the component of the neutralizer specifically include following component by weight percentage first：
Sodium carbonate 5%~7%；
Water 93%~95%；
Then in by the anti-corrosion steel bearing parts of high nitrogen in neutralizer and 1min~2min；
11st step, the 5th flowing cool water rinsing：
It takes the next step, the anti-corrosion steel bearing parts of high nitrogen is sufficiently rinsed in the cold water of flowing, rinsing time is 30S~300S；
12nd step, antirust：
It takes the next step, preparation antirust solution, the component of the antirust solution specifically include following component by weight percentage first：
Sodium nitrite 10%~12%；
Sodium carbonate 1%~2%；
Water 86%~89%；
Then the anti-corrosion steel bearing parts of high nitrogen is impregnated into 1min~2min in antirust solution；
13rd step checks：
It takes the next step, in the state of high nitrogen anti-corrosion steel bearing parts moistened surface, carries out meat under sunlight or broad light immediately
Eye examination, the high nitrogen anti-corrosion steel bearing parts surface after normal etch are uniform light gray, and the color at grinding burn is in
Grey black or black, shape are strip, foliaceous or dotted, and interface is obvious, has certain direction, i.e., mostly along processing
Direction, is canescence piebald at carbon of shaking off poverty, and crackle is thinner.
The method for detecting the anti-corrosion steel bearing parts manufacturing deficiency of high nitrogen, it is clear when degreasing in the first step
The temperature of washing lotion is 75 DEG C~90 DEG C, and the time is 1min~5min.
The method for detecting the anti-corrosion steel bearing parts manufacturing deficiency of high nitrogen, the temperature of hot water in the second step
Degree is 75 DEG C~90 DEG C.
Using technical solution as described above, the present invention has superiority as described below：
The present invention is bright by degreasing → hot water cleaning → flowing cool water rinsing → etch → second of flowing cool water rinsing → the first
Change → third time flowing cool water rinsing → second of brightization → four time flowing cool water rinsing → neutralization → five time flowing cool water
Rinsing → antirust and etc., it can quickly and accurately show the anti-corrosion steel bearing parts of high nitrogen in heat treatment and grinding
The defects of journey, uniformly, do not corrode, normal color is uniform ash for the anti-corrosion steel bearing parts surface corrosion of high nitrogen after etch
Strip, the foliaceous or dotted of grey black or black is presented in color, grinding burn, and interface is obvious, there is certain direction, i.e., more
Along the direction of processing；It shakes off poverty for canescence piebald etc. at carbon, the present invention has been applied in production and processing, avoids because of processing quality
Defect and caused by bearing failure, guarantee bearing finished products service life and security performance, reduce economic loss etc., be suitble to a wide range of
Promotion and application.
Specific embodiment
The present invention can be explained in more detail by the following examples, the invention is not limited to the following examples；
A kind of method for detecting the anti-corrosion steel bearing parts manufacturing deficiency of high nitrogen of the present invention, specifically includes following step
Suddenly：
The first step, degreasing：
Cleaning solution is prepared first, and the component of the cleaning solution specifically includes following component by weight percentage：
Cleaning agent 4%~5%；
Water 95%~96%；
In the specific implementation, then cleaning agent preferably 4.5%, water preferably 95.5% prepare cleaning solution, but when cleaning agent is lower than 4%
When, degreasing effect is not had, when cleaning agent is greater than 5%, degreasing effect is poor, but also will cause unnecessary waste etc.；
Then the anti-corrosion steel bearing parts of high nitrogen to be detected is put into prepared cleaning solution and carries out degreasing, when the degreasing
The temperature of cleaning solution is 75 DEG C~90 DEG C, wherein the time is 1min~5min it is preferred that 80 DEG C, wherein it is preferred that the time is 3
min；
Second step, hot water cleaning：
It takes the next step, sufficiently rinses the anti-corrosion steel bearing parts of high nitrogen after degreasing in 75 DEG C~90 DEG C of hot water, clean
Time is 30S~300S；
Third step, flowing cool water rinsing：
It takes the next step, the anti-corrosion steel bearing parts of high nitrogen is sufficiently rinsed in the cold water of flowing, rinsing time is 30S~300S；
4th step, etch：
It takes the next step, preparation etching solution, the component of the etching solution specifically include following component by weight percentage first：
Nitric acid 25%~30%；
Hydrochloric acid 10%~15%；
Ferric trichloride 2%~4%；
Water 51%~63%；
In the specific implementation, when etching solution is prepared, nitric acid preferably 29%, hydrochloric acid preferably 12%, ferric trichloride preferably 2.5%, water is excellent
56.5% is selected to be prepared；Or nitric acid selection 25%, hydrochloric acid selection 15%, ferric trichloride selection 4%, wet concentration is selected 56% and is matched
Etching solution processed；Or nitric acid selection 30%, hydrochloric acid selection 10%, ferric trichloride selection 2%, wet concentration selects 58% and carries out preparation etch
Liquid；
Then by the anti-corrosion steel bearing parts etch 1.5min~2.5min in etching solution of high nitrogen；
5th step, second of flowing cool water rinsing：
It takes the next step, the anti-corrosion steel bearing parts of high nitrogen is sufficiently rinsed in the cold water of flowing, rinsing time is 30S~300S；
6th step, the first brightization：
It takes the next step, prepare brightization liquid first, the component of stating clearly liquid specifically includes following component by weight percentage：
Potassium permanganate 3%~5%；
Phosphatase 11 0%~12%；
Water 83%~87%；
In the specific implementation, brightization liquid can choose potassium permanganate 3%, phosphatase 11 2%, and water 85% is prepared；Or it can be with
Select potassium permanganate 5%；Phosphatase 11 0%, water 85% are prepared；Or it is also an option that potassium permanganate 4%, phosphatase 11 1%, water
85% is prepared；
Then by the anti-corrosion steel bearing parts of high nitrogen room temperature brightization 30S~60S in brightization liquid；
7th step, the rinsing of third time flowing cool water：
It takes the next step, the anti-corrosion steel bearing parts of high nitrogen is sufficiently rinsed in the cold water of flowing, rinsing time is 30S~300S；
8th step, second of brightization：
It takes the next step, prepare secondary brightization liquid first, the component of the secondary brightization liquid is specifically included by weight percentage such as the following group
Point：
Hydrochloric acid solution 99.675%~99.885%；
Metallic tin grain 0.015%~0.025%；
Stannous chloride 0.1%~0.3%；
In the specific implementation, secondary brightization liquid can choose hydrochloric acid solution 99.675%, metallic tin grain 0.025%, stannous chloride
0.3% is prepared；Or be also an option that hydrochloric acid solution 99.885%, metallic tin grain 0.015%, stannous chloride 0.1% into
Row is prepared；Or it is also an option that hydrochloric acid solution 99.78%, metallic tin grain 0.02%, stannous chloride 0.2% is prepared；
Then by the anti-corrosion steel bearing parts of high nitrogen in secondary brightization liquid room temperature brightization 30S~60S；
9th step, the 4th flowing cool water rinsing：
It takes the next step, the anti-corrosion steel bearing parts of high nitrogen is sufficiently rinsed in the cold water of flowing, rinsing time is 30S~300S；
Tenth step neutralizes：
It takes the next step, preparation neutralizer, the component of the neutralizer specifically include following component by weight percentage first：
Sodium carbonate 5%~7%；
Water 93%~95%；
In the specific implementation, neutralizer can choose sodium carbonate 5%, and water 95% is prepared；Or it is also an option that sodium carbonate
7%, water 93% is prepared；Or it is also an option that sodium carbonate 6%, water 94% is prepared；
Then in by the anti-corrosion steel bearing parts of high nitrogen in neutralizer and 1min~2min；
11st step, the 5th flowing cool water rinsing：
It takes the next step, the anti-corrosion steel bearing parts of high nitrogen is sufficiently rinsed in the cold water of flowing, rinsing time is 30S~300S；
12nd step, antirust：
It takes the next step, preparation antirust solution, the component of the antirust solution specifically include following component by weight percentage first：
Sodium nitrite 10%~12%；
Sodium carbonate 1%~2%；
Water 86%~89%；
In the specific implementation, antirust solution can choose sodium nitrite 10%, sodium carbonate 2%, and water 88% is prepared, can also be selected
Sodium nitrite 12% is selected, sodium carbonate 1%, water 87% is prepared, it is also an option that sodium nitrite 11%, sodium carbonate 1.5%, water
87.5% is prepared；
Then the anti-corrosion steel bearing parts of high nitrogen is impregnated into 1min~2min in antirust solution；
13rd step checks：
It takes the next step, in the state of high nitrogen anti-corrosion steel bearing parts moistened surface, carries out meat under sunlight or broad light immediately
Eye examination, the high nitrogen anti-corrosion steel bearing parts surface after normal etch are uniform light gray, and the color at grinding burn is in
Grey black or black, shape are strip, foliaceous or dotted, and interface is obvious, has certain direction, i.e., mostly along processing
Direction, is canescence piebald at carbon of shaking off poverty, and crackle is thinner.
It is above-mentioned needed for prepare solution need in strict accordance with proportion prepare, divulge information and the good situation of security protection under into
Row, prepared solution need to be contained in corrosion resistant container.When preparing etching solution and the first brightization liquid, to be first added in water
Solid material stirring adds concentrated acid after being completely dissolved, and slowly must be poured into water concentrated acid in the case where being stirred continuously, forbid
Water is poured into concentrated acid, otherwise can make acid solution spillage that accident occur；In process for preparation, a large amount of heat can be generated, fluid temperature is made
It increases, therefore after the completion of liquid dosage, it is necessary to which waiting the temperature of liquid to be cooled to room temperature can be operated.
Further, it to be operated in strict accordance with above-mentioned testing process sequence, testing process sequence must not be overturned, flowed cold
Water will be always maintained at the flowing of cold water, cleaning, must not there is turbid phenomenon.When finally carrying out quality examination by above-mentioned testing process,
Bearing parts surface does not allow to wipe；It, should inspection according to the size of output to above-mentioned preparation if being carried out continuously production detection
Liquid is surveyed regularly to be chemically examined and replaced.
Beneficial effects of the present invention are as follows：
1, the present invention is put forward for the first time in a kind of method for detecting the anti-corrosion steel bearing parts manufacturing deficiency of high nitrogen in industry, is used
The invention can quickly and accurately show the anti-corrosion steel bearing parts of high nitrogen in heat treatment and the defects of Grinding Process,
The processing quality for steel product that effective monitoring high nitrogen is anti-corrosion.
2, using after etch of the present invention bearing parts surface manufacturing deficiency feature and defect-free surface color difference it is obvious, surface
It, immediately can visual inspection resolution under sunlight or broad light in the state of wetting.Normal color is uniform grey, grinding burn
Strip, the foliaceous or dotted of grey black or black is presented, interface is obvious, has certain direction, i.e., mostly along processing
Direction；It shakes off poverty at carbon as canescence piebald, crackle is thinner.
3, during the present invention has been applied to produce and process, anti-corrosion steel bearings zero of monitoring high nitrogen that can be quick, accurate and effective
The processing quality of part is suitble to large-scale promotion and application, avoids bearing failure caused by due to processing quality defect, guarantee at
Product bearing service life and security performance reduce economic loss.
Part not in the detailed description of the invention is the prior art.
The embodiment selected herein for the open purpose of the present invention, is presently considered to be suitable, still, Ying Liao
Solution, the present invention is intended to include all changes and improvement that all belong to the embodiment in this design and invention scope.
Claims (3)
1. a kind of method for detecting the anti-corrosion steel bearing parts manufacturing deficiency of high nitrogen, it is characterized in that：Specifically include following step
Suddenly：
The first step, degreasing：
Cleaning solution is prepared first, and the component of the cleaning solution specifically includes following component by weight percentage：
Cleaning agent 4%~5%；
Water 95%~96%；
Then the anti-corrosion steel bearing parts of high nitrogen to be detected is put into prepared cleaning solution and carries out degreasing；
Second step, hot water cleaning：
Take the next step, in the hot water sufficiently rinse the anti-corrosion steel bearing parts of high nitrogen after degreasing, scavenging period be 30S~
300S；
Third step, flowing cool water rinsing：
It takes the next step, the anti-corrosion steel bearing parts of high nitrogen is sufficiently rinsed in the cold water of flowing, rinsing time is 30S~300S；
4th step, etch：
It takes the next step, preparation etching solution, the component of the etching solution specifically include following component by weight percentage first：
Nitric acid 25%~30%；
Hydrochloric acid 10%~15%；
Ferric trichloride 2%~4%；
Water 51%~63%；
Then by the anti-corrosion steel bearing parts etch 1.5min~2.5min in etching solution of high nitrogen；
5th step, second of flowing cool water rinsing：
It takes the next step, the anti-corrosion steel bearing parts of high nitrogen is sufficiently rinsed in the cold water of flowing, rinsing time is 30S~300S；
6th step, the first brightization：
It takes the next step, prepare brightization liquid first, the component of stating clearly liquid specifically includes following component by weight percentage：
Potassium permanganate 3%~5%；
Phosphatase 11 0%~12%；
Water 83%~87%；
Then by the anti-corrosion steel bearing parts of high nitrogen brightization 30S~60S in brightization liquid；
7th step, the rinsing of third time flowing cool water：
It takes the next step, the anti-corrosion steel bearing parts of high nitrogen is sufficiently rinsed in the cold water of flowing, rinsing time is 30 S~300S；
8th step, second of brightization：
It takes the next step, prepare secondary brightization liquid first, the component of the secondary brightization liquid is specifically included by weight percentage such as the following group
Point：
Hydrochloric acid solution 99.675%~99.885%；
Metallic tin grain 0.015%~0.025%；
Stannous chloride 0.1%~0.3%；
Then by the anti-corrosion steel bearing parts of high nitrogen in secondary brightization liquid brightization 30S~60S；
9th step, the 4th flowing cool water rinsing：
It takes the next step, the anti-corrosion steel bearing parts of high nitrogen is sufficiently rinsed in the cold water of flowing, rinsing time is 30S~300S；
Tenth step neutralizes：
It takes the next step, preparation neutralizer, the component of the neutralizer specifically include following component by weight percentage first：
Sodium carbonate 5%~7%；
Water 93%~95%；
Then in by the anti-corrosion steel bearing parts of high nitrogen in neutralizer and 1min~2min；
11st step, the 5th flowing cool water rinsing：
It takes the next step, the anti-corrosion steel bearing parts of high nitrogen is sufficiently rinsed in the cold water of flowing, rinsing time is 30S~300S；
12nd step, antirust：
It takes the next step, preparation antirust solution, the component of the antirust solution specifically include following component by weight percentage first：
Sodium nitrite 10%~12%；
Sodium carbonate 1%~2%；
Water 86%~89%；
Then the anti-corrosion steel bearing parts of high nitrogen is impregnated into 1min~2min in antirust solution；
13rd step checks：
It takes the next step, in the state of high nitrogen anti-corrosion steel bearing parts moistened surface, carries out meat under sunlight or broad light immediately
Eye examination, the high nitrogen anti-corrosion steel bearing parts surface after normal etch are uniform light gray, and the color at grinding burn is in
Grey black or black, shape are strip, foliaceous or dotted, and interface is obvious, has certain direction, i.e., mostly along processing
Direction, is canescence piebald at carbon of shaking off poverty, and crackle is thinner.
2. the method according to claim 1 for detecting the anti-corrosion steel bearing parts manufacturing deficiency of high nitrogen, it is characterized in that：
The temperature of cleaning solution is 75 DEG C~90 DEG C when degreasing in the first step, and the time is 1min~5min.
3. the method according to claim 1 for detecting the anti-corrosion steel bearing parts manufacturing deficiency of high nitrogen, it is characterized in that：
The temperature of hot water is 75 DEG C~90 DEG C in the second step.
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| CN109557107A (en) * | 2018-12-29 | 2019-04-02 | 南工大溧阳新材料研发中心有限公司 | A kind of method for detection fault detection of stainless steel/carbon composite material |
| CN110103083A (en) * | 2019-02-28 | 2019-08-09 | 江苏力星通用钢球股份有限公司 | A kind of big ball polishing of wind-powered electricity generation is boiling hot to boil technique |
| CN112504978A (en) * | 2020-11-12 | 2021-03-16 | 中国航发中传机械有限公司 | Grinding burn detection method for acid-corrosion-resistant steel part |
| CN114839030A (en) * | 2022-03-21 | 2022-08-02 | 洛阳轴承研究所有限公司 | Cold pickling solution for identifying surface defects of high-nitrogen stainless steel and application thereof |
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| CN112504978A (en) * | 2020-11-12 | 2021-03-16 | 中国航发中传机械有限公司 | Grinding burn detection method for acid-corrosion-resistant steel part |
| CN114839030A (en) * | 2022-03-21 | 2022-08-02 | 洛阳轴承研究所有限公司 | Cold pickling solution for identifying surface defects of high-nitrogen stainless steel and application thereof |
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