CN117405477A - Method for checking pickling burn of aviation material W9Cr4V2Mo bearing part - Google Patents
Method for checking pickling burn of aviation material W9Cr4V2Mo bearing part Download PDFInfo
- Publication number
- CN117405477A CN117405477A CN202311380848.7A CN202311380848A CN117405477A CN 117405477 A CN117405477 A CN 117405477A CN 202311380848 A CN202311380848 A CN 202311380848A CN 117405477 A CN117405477 A CN 117405477A
- Authority
- CN
- China
- Prior art keywords
- pickling
- minutes
- washing
- burn
- brightening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005554 pickling Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000000463 material Substances 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000005282 brightening Methods 0.000 claims abstract description 34
- 238000004140 cleaning Methods 0.000 claims abstract description 13
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000002265 prevention Effects 0.000 claims abstract description 8
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 7
- 238000011179 visual inspection Methods 0.000 claims abstract description 7
- 238000007689 inspection Methods 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims description 38
- 239000007788 liquid Substances 0.000 claims description 27
- 238000002791 soaking Methods 0.000 claims description 22
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 9
- 238000006386 neutralization reaction Methods 0.000 claims description 7
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims description 6
- 239000004115 Sodium Silicate Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 235000010288 sodium nitrite Nutrition 0.000 claims description 3
- 239000001488 sodium phosphate Substances 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 3
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 3
- 229910000406 trisodium phosphate Inorganic materials 0.000 claims description 3
- 235000019801 trisodium phosphate Nutrition 0.000 claims description 3
- 238000005238 degreasing Methods 0.000 abstract description 6
- 238000010791 quenching Methods 0.000 abstract description 3
- 230000000171 quenching effect Effects 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 24
- 239000002253 acid Substances 0.000 description 19
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 8
- 230000008030 elimination Effects 0.000 description 7
- 238000003379 elimination reaction Methods 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 229910017604 nitric acid Inorganic materials 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 206010016256 fatigue Diseases 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 238000005352 clarification Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229910001960 metal nitrate Inorganic materials 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 206010053615 Thermal burn Diseases 0.000 description 1
- 229910021626 Tin(II) chloride Inorganic materials 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910001510 metal chloride Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 235000011150 stannous chloride Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- AXZWODMDQAVCJE-UHFFFAOYSA-L tin(II) chloride (anhydrous) Chemical compound [Cl-].[Cl-].[Sn+2] AXZWODMDQAVCJE-UHFFFAOYSA-L 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention provides an inspection method for pickling burn of an aviation material W9Cr4V2Mo bearing part, which comprises degreasing, hot water cleaning, flowing cold water cleaning, pickling, flowing cold water cleaning, first brightening, flowing cold water cleaning, second brightening, flowing cold water cleaning, neutralizing, flowing cold water cleaning, rust prevention, visual inspection, wherein the normal surface is gray black or dark gray, the surface of a tempered burn is light white, the burn area of the secondary quenching is gray, the periphery of the gray burn area is often accompanied with a light white tempered burn ring, and the periphery of the gray is accompanied with a light white tempered ring.
Description
Technical Field
The invention relates to a method for checking pickling burn of an aviation material W9Cr4V2Mo bearing part.
Background
The main shaft bearing is used for the main shaft bearing of an aeroengine and an important bearing for a helicopter transmission system, and is one of important key components of an aerocraft due to the application occasions and the specificity and importance of the working conditions.
The W9Cr4V2Mo material has high quenching temperature (1150 ℃ or above), is easy to generate phenomena of overheating of tissues, coarse grains, more residual austenite and the like, has poor dimensional stability, and is easy to burn when the part is ground. The generation of grinding burn causes the transformation of the tissue of the burn area of the part, changes the original tissue and the residual stress state of the bearing part, causes the reduction of wear resistance and fatigue strength, and any slight burn local area is easy to cause stress concentration to generate microcracks in the use process of the part, so that early fatigue stripping occurs. Therefore, burn inspection is carried out on the bearing parts manufactured by the W9Cr4V2Mo steel, the service life of the bearing can be prolonged, and the economic benefit is increased.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for checking pickling burn of an aviation material W9Cr4V2Mo bearing part, and the invention improves pickling solution and brightening solution and can check slight burn which cannot be checked by the original method.
The invention provides a method for inspecting pickling burn of an aviation material W9Cr4V2Mo bearing part, which comprises the following steps of
Step one: deoiling, namely mixing 3% anhydrous sodium carbonate, 3% trisodium phosphate, 0.2% sodium silicate and H 2 Soaking the rest liquid of O; the soaking temperature is 70-80 ℃, and the bearing part is subjected to shaking soaking for more than two minutes;
step two: cleaning with hot water, namely cleaning with hot water at 70-80 ℃ for 1-2 minutes;
step three: flowing cold water for washing, and washing with cold water for 1-2 minutes under a greenhouse;
step four: pickling, namely carrying out shaking pickling on the bearing part at room temperature through pickling solution, controlling the time to be 1-2 minutes, and observing blackening of the surface of the bearing part;
step five: flowing cold water for washing, and washing with clear water in a greenhouse for 1-2 minutes;
step six: the first brightening is carried out, and shaking soaking is carried out for 0.5-1.5 minutes through the first brightening liquid at room temperature;
step seven: flowing cold water for washing, and washing with clear water in a greenhouse for 1-2 minutes;
step eight: the second brightening is carried out, and soaking is carried out for 0.5-1 min through the second brightening shaking at room temperature;
step nine: flowing cold water for washing, and washing with clear water in a greenhouse for 1-2 minutes;
step ten: neutralizing, namely soaking the bearing part for 1-2 minutes at room temperature through a neutralizing solution; the ratio of the neutralization solution to anhydrous sodium carbonate+H of 4-5% 2 The balance of O;
step eleven: flowing cold water for washing, and washing with clear water in a greenhouse for 1-2 minutes;
step twelve: rust prevention, namely soaking the bearing part for 1-2 minutes at room temperature through rust prevention liquid; the proportion of the antirust liquid is 1-2% of anhydrous sodium carbonate, 8-10% of sodium nitrite and H 2 The balance of O;
step thirteen: and (5) carrying out visual inspection, namely, carrying out visual inspection on the pickled bearing part under the light.
The beneficial effects of the invention are as follows: the existing pickling solution and the existing brightening solution cannot detect slight burns, and the burnt areas are difficult to distinguish after pickling, so that the detection efficiency is low, and the production of enterprises is not facilitated. The invention can better check some slight burns through the improved pickling solution and the improved brightening solution, and can be checked by naked eyes. By adopting the method, burn can be detected well, and early fatigue peeling of bearing parts caused by undetected slight burn is avoided, so that the service life of the bearing is reduced; the burn of W9Cr4V2Mo is different from bearing steel such as GCr15, 9Cr18Mo, cr4MoV and the like, the normal surface is gray or dark gray, the tempered burn surface is light white, the secondary quenching burn is gray, the periphery of a gray burn area is often accompanied by a light white tempered burn ring, the periphery of the gray is accompanied by a light white tempered ring, the method can replace the existing burn checking method of W9Cr4V2Mo steel, the accuracy of the detection result is high, the later processing and use of the bearing are not damaged, and the pickling burn checking method can be expected to generate more than 100 ten thousand yuan.
Further, the proportion of the pickling solution is 4.5 percent HNO 3 +3.5%FeCl 3 +margin H 2 O。
By adopting the technical scheme, HNO in the pickling solution 3 Has acidity and strong oxidizing property, feCl 3 Also has strong oxidizing property, so that not only the matrix can be decomposed in the pickling process, but alsoAnd the working principle of the pickling solution for oxidizing part of carbide is as follows:
4Fe+10H + +NO 3 — =4Fe 2+ +NH 4 + +3H2O
Fe 2 O 3 +6H + =2Fe 3+ +3H2O
Cr 2 O 3 +6H + =2Cr 3+ +3H2O
W+2H + +2NO 3 — =H 2 WO 4 +2NO />
V 2 C 4 H+12H + +12NO3 — =2VO（NO 3 ） 2 +8NO +4CO 2 />+6H2O
Fe 3 W 3 C+16H + +12NO 3 — =3Fe 3+ +3H 2 WO 4 +CO 2 +9NO +4NO 2 /> +5H2O
further, the proportion of the first brightening liquid is 13-15% CrO 3 +0.4%H 2 SO 4 +margin H 2 O。
By adopting the technical scheme, after the W9Cr4V2Mo steel is subjected to heat treatment, more carbide exists (M6C 9, M23C6 and MC), the carbide is relatively stable and can be dissolved in common acid at room temperature, a black carbide layer is attached to the surface of a part after pickling, and meanwhile, the M (NO) generated by the reaction of the bearing part and pickling solution 3 ） 2 (e.gVO（NO 3 ） 2 Etc.) and H 2 WO 4 The reactant is attached to the metal surface, and the burn defect of the bearing part is not easy to be displayed, so that the surface needs to be subjected to the clarification treatment.
CrO in an acidic solution 3 Is a strong oxidant, can adhere low-valence metal nitrate and H on the metal surface 2 WO 4 The precipitate is oxidized into high valence metal ion, and the carbide is oxidized into carbonic acid ion to be dissolved in the brightening liquid. Washing the part with water to remove residual acid, immersing the part in the first brightening liquid, and brightening for 0.5 to 1.5 minutes.
Further, the proportion of the second brightening liquid is 10-15% HCl+0.2-0.4% SnCl 2 +100 to 200 g/slot Sn+balance H 2 O。
By adopting the technical scheme, the sulfate generated after primary brightening and carbide and metal sulfate-metal nitrate which are reacted still have part adsorbed on the surface of the part, and the part is immersed into secondary brightening liquid after being washed with water. Hydrochloric acid converts the metal sulfate produced by primary clarification into metal chloride which is dissolved in hydrochloric acid solution. SnCl 2 Is a reducing agent, which can convert Fe 3 + Oxidation-reduction reaction with simple substance Fe accelerates the dissolution of simple substance Fe, and metal Sn can oxidize SnCl 4 Reduction to SnCl 2 The stability of the solution is maintained.
Drawings
FIG. 1 is a schematic flow chart of an embodiment of the present invention;
FIG. 2 is a schematic view of burn effect according to an embodiment of the present invention;
fig. 3 is a schematic view of a burn effect of the prior art.
Detailed Description
Embodiments of the invention are further described below with reference to the accompanying drawings: as shown in the figure, the method for inspecting the pickling burn of the bearing part of the aviation material W9Cr4V2Mo comprises the following steps of:
step one: deoiling, mixing with 3% anhydrous sodium carbonate (Na 2 CO 3 ) +3% trisodium phosphate (Na) 3 PO 4 •12H 2 O) +0.2% sodium silicate (Na) 2 SiO 3 ）+ H 2 Soaking the rest liquid of O; the soaking temperature is 70-80 ℃, and the bearing part is subjected to shaking soaking for more than two minutes;
the total alkali content Na of the degreasing tank control index in the first step 2 CO 3 4% -8%, wherein the framing volume of the part is required to be smaller than 1/2 of the solution volume; swinging the part frame during oil removal, and shaking up and down; visual clean (without hanging water drops) during oil removal;
step two: cleaning with hot water, namely cleaning with hot water at 70-80 ℃ for 1-2 minutes;
step three: flowing cold water for washing, and washing with cold water for 1-2 minutes under a greenhouse;
step four: pickling, namely carrying out shaking pickling on the bearing part at room temperature through pickling solution, controlling the time to be 1-2 minutes, and observing blackening of the surface of the bearing part; the surface of the bearing part should be pickled to appear gray black or dark gray. The pickling process should be rocked up and down; pickling until the surface defect of the bearing part appears;
pickling the surface of a part, carrying out neutralization and rust prevention, and then visually inspecting under a floodlight in a wet state, and picking out the part with the surface defects, wherein the part is commonly used for checking defects such as grinding burn and the like generated in grinding;
(1) The acid etching amount of the acid washing process is 2-4 mu m, so the grinding process amount needs to consider the acid washing amount;
(2) The bearing parts are washed in a flowing cold water tank to ensure that the upper tank solution is washed cleanly;
(3) The rest of pickling inspection is regulated according to JB/T2850;
step five: flowing cold water for washing, and washing with clear water in a greenhouse for 1-2 minutes;
step six: the first brightening is carried out, and shaking soaking is carried out for 0.5-1.5 minutes through the first brightening liquid at room temperature;
step seven: flowing cold water for washing, and washing with clear water in a greenhouse for 1-2 minutes;
step eight: the second brightening is carried out, and soaking is carried out for 0.5-1 min through the second brightening shaking at room temperature;
step nine: flowing cold water for washing, and washing with clear water in a greenhouse for 1-2 minutes;
step ten: neutralizing, namely soaking the bearing part for 1-2 minutes at room temperature through a neutralizing solution; the ratio of the neutralization solution to anhydrous sodium carbonate+H of 4-5% 2 The balance of O (95.0-96.0%);
step eleven: flowing cold water for washing, and washing with clear water in a greenhouse for 1-2 minutes;
step twelve: rust prevention, namely soaking the bearing part for 1-2 minutes at room temperature through rust prevention liquid; the proportion of the antirust liquid is 1-2% of anhydrous sodium carbonate, 8-10% of sodium nitrite and H 2 The balance of O;
step thirteen: and (5) carrying out visual inspection, namely, carrying out visual inspection on the pickled bearing part under the light.
Acid washing abnormality, cause analysis and elimination method:
1. over pickling of parts (pickling out of tolerance)
The reason is that: the part is placed in acid too long, and the acid is too thick;
the elimination method comprises the following steps: shortens the immersion time of the parts in acid and reduces the concentration of acid.
2. Spots and faces are formed on the parts after pickling
The reason is that: the degreasing of the surface is not clean, the degreasing liquid is dirty, and the degreasing liquid is insufficient in temperature;
the elimination method comprises the following steps: checking the concentration of the oil removing liquid, increasing the time to increase the temperature, replacing the solution, cleaning the parts, and degreasing and pickling again.
3. Insufficient acid etching of the surface of the part
The reason is that: the nitric acid concentration is low, and the holding time of the part in acid is short;
the elimination method comprises the following steps: the concentration of the pickling solution was checked and the pickling time in nitric acid was adjusted to increase, and the pickled parts were pickled again.
4. Insufficient surface definition of parts
The reason is that: the components of the brightening liquid are changed, the brightening time is insufficient, and the part is excessively etched in nitric acid;
the elimination method comprises the following steps: detecting and correcting the components of the brightening liquid, prolonging the brightening time, shortening the soaking time of the parts in nitric acid, and carrying out the brightening treatment again on the parts with insufficient brightening.
5. Rust after acid washing
The reason is that: acid and salts thereof are not washed, and acid neutralization is poor;
the elimination method comprises the following steps: the washing time is increased, the water flow is increased, and the components of the neutralization liquid are corrected, so that the neutralization of the pickled parts is completed.
6. Points and marks on the surface of the part without acid etching
The reason is that: the contact between the oil removal and the acid washing is too tight, and bubbles on the surface of the part are not immersed in acid liquor;
the elimination method comprises the following steps: the contact of parts is prevented from being too tight, and shaking is enhanced during oil removal and acid washing.
The proportion of the pickling solution is 4.5 percent HNO 3 +3.5%FeCl 3 (or use of ferric chloride FeCl) 2 •6H 2 O) +balance H 2 O。
The proportion of the first brightening liquid is 13-15% chromic anhydride (CrO) 3 ）+0.4%H 2 SO 4 +margin H 2 O。
The proportion of the second brightening liquid is 10-15% of HCl+0.2-0.4% of tin dichloride (SnCl) 2 ) +100 to 200 g/slot Sn+balance H 2 O。
As shown in fig. 2, the normal surface should be gray black or dark gray, the tempered burn surface light white, and the secondary quenched burn appears gray, and the gray burn zone periphery is often accompanied by a light white tempered burn ring. As shown in fig. 2, the gray surroundings are accompanied by a light white backfire, and fig. 3 shows the burn effect of the prior art, which is undetectable for minor burns.
The above embodiment is only one of the preferred embodiments of the present invention, and common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are included in the scope of the present invention.
Claims (4)
1. An inspection method for pickling burn of an aviation material W9Cr4V2Mo bearing part is characterized by comprising the following steps: the method comprises the following steps:
step one: deoiling, namely mixing 3% anhydrous sodium carbonate, 3% trisodium phosphate, 0.2% sodium silicate and H 2 Soaking the rest liquid of O; the soaking temperature is 70-80 ℃, and bearing parts are subjected toShaking and soaking for more than two minutes;
step two: cleaning with hot water, namely cleaning with hot water at 70-80 ℃ for 1-2 minutes;
step three: flowing cold water for washing, and washing with cold water for 1-2 minutes under a greenhouse;
step four: pickling, namely carrying out shaking pickling on the bearing part at room temperature through pickling solution, controlling the time to be 1-2 minutes, and observing blackening of the surface of the bearing part;
step five: flowing cold water for washing, and washing with clear water in a greenhouse for 1-2 minutes;
step six: the first brightening is carried out, and shaking soaking is carried out for 0.5-1.5 minutes through the first brightening liquid at room temperature;
step seven: flowing cold water for washing, and washing with clear water in a greenhouse for 1-2 minutes;
step eight: the second brightening is carried out, and soaking is carried out for 0.5-1 min through the second brightening shaking at room temperature;
step nine: flowing cold water for washing, and washing with clear water in a greenhouse for 1-2 minutes;
step ten: neutralizing, namely soaking the bearing part for 1-2 minutes at room temperature through a neutralizing solution; the ratio of the neutralization solution to anhydrous sodium carbonate+H of 4-5% 2 The balance of O;
step eleven: flowing cold water for washing, and washing with clear water in a greenhouse for 1-2 minutes;
step twelve: rust prevention, namely soaking the bearing part for 1-2 minutes at room temperature through rust prevention liquid; the proportion of the antirust liquid is 1-2% of anhydrous sodium carbonate, 8-10% of sodium nitrite and H 2 The balance of O;
step thirteen: and (5) carrying out visual inspection, namely, carrying out visual inspection on the pickled bearing part under the light.
2. The method for inspecting pickling and burn-out of an aeronautical material W9Cr4V2Mo bearing component according to claim 1, characterized in that: the proportion of the pickling solution is 4.5 percent HNO 3 +3.5% FeCl 3 +margin H 2 O。
3. The method for inspecting pickling and burn-out of an aeronautical material W9Cr4V2Mo bearing component according to claim 1, characterized in that: said firstThe proportion of the brightening liquid is 13-15% CrO 3 +0.4%H 2 SO 4 +margin H 2 O。
4. The method for inspecting pickling and burn-out of an aeronautical material W9Cr4V2Mo bearing component according to claim 2, characterized in that: the proportion of the second brightening liquid is 10-15% of HCl+0.2-0.4% of SnCl 2 +100 to 200 g/slot Sn+balance H 2 O。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311380848.7A CN117405477A (en) | 2023-10-23 | 2023-10-23 | Method for checking pickling burn of aviation material W9Cr4V2Mo bearing part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311380848.7A CN117405477A (en) | 2023-10-23 | 2023-10-23 | Method for checking pickling burn of aviation material W9Cr4V2Mo bearing part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117405477A true CN117405477A (en) | 2024-01-16 |
Family
ID=89486602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311380848.7A Pending CN117405477A (en) | 2023-10-23 | 2023-10-23 | Method for checking pickling burn of aviation material W9Cr4V2Mo bearing part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117405477A (en) |
-
2023
- 2023-10-23 CN CN202311380848.7A patent/CN117405477A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2126460C1 (en) | Method of pickling stainless steel | |
| CN104611713A (en) | Mixed-acid acid washing liquid and acid washing method for 400-series stainless steel hot-rolled annealing wire | |
| US5477976A (en) | Brightening chemical polishing solution for hardened steel article and method of chemically polishing said article in the solution | |
| CN105369266A (en) | Steel acid washing liquid based on Fenton oxidation reaction and acid washing process | |
| CN117405477A (en) | Method for checking pickling burn of aviation material W9Cr4V2Mo bearing part | |
| CN110699696A (en) | Acid pickling passivation method for stainless steel pipe fitting | |
| CN110607524A (en) | Surface treatment process for rubber sealing element framework | |
| CN112853364A (en) | Condenser manganese scale chemical cleaning agent | |
| CN105506536B (en) | A kind of resistance to etching technique of carbon steel frying pan | |
| CN105648432A (en) | Preparation method of blue oxide film on surface of spring steel | |
| CN116481882A (en) | Original austenite grain boundary showing method for high-temperature bearing steel | |
| CN112301351A (en) | Pickling and passivating process for austenitic stainless steel part | |
| CN107460491A (en) | A kind of environment-friendly hot rolling low chrome ferritic stainless steel acid washing method | |
| CN1309870C (en) | Acid pickle for detecting processing deficiency of bearing parts made of carbonized steel | |
| CN107988593A (en) | Metal surface treating method | |
| JP2006045659A (en) | Method for producing stainless steel and stainless steel tube | |
| KR20190020948A (en) | Scale removing apparatus for ferritic stainless steel and method for removing scale using the same | |
| KR100249062B1 (en) | Cleaning method for superheating and reheating heat exchanger | |
| JP4316029B2 (en) | Stainless steel pickling method and pickling solution | |
| CN114839030B (en) | Cold pickling solution for identifying surface defects of high-nitrogen stainless steel and application thereof | |
| CN107475732A (en) | A kind of pickling bright technique of corrosion-resistant stainless steel seamless steel pipe | |
| CN110629211A (en) | Method for improving rust-proof performance of stainless steel and rust-proof substance | |
| CN116121692A (en) | Manufacturing process of carbon steel spring plate | |
| CN116770322A (en) | Method for removing iron pollution on surface of titanium alloy blade of aero-engine | |
| CN112899696A (en) | Environment-friendly stainless steel pickling method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |