CN117660840A - Wear-resistant shot blasting with long service life - Google Patents
Wear-resistant shot blasting with long service life Download PDFInfo
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- CN117660840A CN117660840A CN202311656479.XA CN202311656479A CN117660840A CN 117660840 A CN117660840 A CN 117660840A CN 202311656479 A CN202311656479 A CN 202311656479A CN 117660840 A CN117660840 A CN 117660840A
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- 238000005422 blasting Methods 0.000 title claims abstract description 45
- 238000010791 quenching Methods 0.000 claims abstract description 44
- 230000000171 quenching effect Effects 0.000 claims abstract description 44
- 238000001816 cooling Methods 0.000 claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 229910052796 boron Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- 238000009689 gas atomisation Methods 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 238000004321 preservation Methods 0.000 claims abstract description 3
- 238000009692 water atomization Methods 0.000 claims abstract description 3
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 23
- 239000000203 mixture Substances 0.000 description 14
- 238000000889 atomisation Methods 0.000 description 13
- 229910001566 austenite Inorganic materials 0.000 description 11
- 238000004088 simulation Methods 0.000 description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 10
- 239000011651 chromium Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 238000005299 abrasion Methods 0.000 description 7
- 239000011572 manganese Substances 0.000 description 7
- 238000012986 modification Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000005480 shot peening Methods 0.000 description 6
- 230000007774 longterm Effects 0.000 description 5
- 229910052698 phosphorus Inorganic materials 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 206010017472 Fumbling Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000006187 pill Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Coating By Spraying Or Casting (AREA)
Abstract
The invention relates to wear-resistant long-life shot blasting, which comprises the following components in percentage by mass: c:0.55-1.0%, si:0.25-0.65%, mn:5.8-10.5%, cr:3.0-7.0%, ni:5.6-8.4%, B:0.0015 to 0.004 percent, P: less than 0.05%, S: less than 0.03%, and the balance being Fe and unavoidable impurities; carrying out water atomization or gas atomization on molten steel with the components to obtain shot blasting, heating the shot blasting to 820-900 ℃ for heat preservation, quenching to room temperature, and quenching cooling at the speed V 1 ≤V≤V 2 In units of ℃/s, where V 1 =8.58*ln(103.8‑11.27*[B]‑5.78*[Mn]‑3.16*[Cr]‑1.88*[Si]‑1.05*[Ni]‑2.14*[C])+13.7；V 2 =37.5+3018*[B]‑1.5*[Mn]+5.4*[Cr]‑2.1*[Ni]‑6.2*[Si]+37.9*[C]The method comprises the steps of carrying out a first treatment on the surface of the In the formula, [ C ]]、[Si]、[Mn]、[Cr]、[Ni]、[B]Respectively represent the mass percent of C, si, mn, cr, ni, B.
Description
Technical Field
The invention relates to a wear-resistant long-life shot which has excellent wear resistance and has long service life, and shot bodies are free from problems such as breakage of shot bodies during long-term use.
Background
Shot blasting, also called shot blasting, is performed by spraying the shot blasting agent onto the surface of a metal material for material surface modification (e.g., hardening), or for removing surface scale, rust, coating, etc. The prior art generally places high demands on the strength, wear resistance (i.e. hardness) of the shot, and therefore the shot generally needs to maintain an austenitic structure. In order to obtain an austenite structure, it is necessary to ensure that the austenite structure is kept at room temperature by adding a certain cooling rate in addition to the control components satisfying certain conditions.
In actual industrial production, shot blasting is generally produced by a process of atomizing a melt with water or gas, however, the atomization process is generally extremely high in cooling rate. During the use of shot blasting, it was found that chipping often occurs during working due to high-speed collision between shot blasting and working surface or shot blasting due to an excessively high cooling rate, resulting in damage after a short period of working, insufficient working life, and easy leaving defects on the surface during surface treatment.
Based on the problems in the prior art, the invention provides shot blasting which has excellent wear resistance and is not easy to break in the use process and has high service life.
Disclosure of Invention
The invention provides a wear-resistant long-life shot which is excellent in wear resistance, does not cause problems such as breakage of shot during long-term use, and has a long service life.
The technical purpose of the invention is realized by the following means.
The invention provides wear-resistant long-life shot blasting, which comprises the following components in percentage by mass: c:0.55-1.0%, si:0.25-0.65%, mn:5.8-10.5%, cr:3.0-7.0%, ni:5.6-8.4%, B:0.0015 to 0.004 percent, P: less than 0.05%, S: less than 0.03%, and the balance being Fe and unavoidable impurities;
carrying out water atomization or gas atomization on molten steel with the components to obtain shot blasting, heating the shot blasting to 820-900 ℃ for heat preservation, quenching to room temperature, and quenching cooling at the speed V 1 ≤V≤V 2 Unit is ℃/s, wherein:
V 1 =8.58*ln(103.8-11.27*[B]-5.78*[Mn]-3.16*[Cr]-1.88*[Si]-1.05*[Ni]-2.14*[C])+13.7；
V 2 =37.5+3018*[B]-1.5*[Mn]+5.4*[Cr]-2.1*[Ni] -6.2*[Si]+37.9*[C]；
wherein [ C ], [ Si ], [ Mn ], [ Cr ], [ Ni ], [ B ] respectively represent the mass percent of C, si, mn, cr, ni, B.
The purposes of the selection of the shot peening composition and the quenching process parameters in the present invention are described below.
C: carbon is an important austenite forming element, is an element for improving hardenability, is used for ensuring the acquisition of an austenite structure at room temperature, and is also an important strength and wear resistance ensuring element, and the content of C is controlled to be 0.55-1.0%.
Si: silicon is also an element for improving hardenability, ensures the stability of austenite at room temperature, and the Si content of the invention is controlled to be 0.25-0.65%.
Mn: manganese is an element for strongly improving hardenability, can effectively promote the formation of austenite, ensures the stability of austenite at room temperature, ensures that shot blasting has excellent strength and wear resistance, and is relatively low in cost, so that a large amount of manganese element is added, and the addition amount is 5.8-10.5%.
Cr: chromium is also an element that improves hardenability, and chromium solid solution in steel can significantly improve strength, and chromium-generated carbide is also important for ensuring wear resistance. The chromium content of the present invention is set at 3.0-7.0%.
Ni: nickel is also an element for improving hardenability, which can effectively improve strength and wear resistance of shot blast and ensure that the shot blast has room temperature austenitic structure. The nickel content of the invention is controlled to be 5.6-8.4%.
B: boron is an element for strongly improving hardenability, and trace boron can obviously reduce the critical cooling speed of the steel, so that the effect of strongly stabilizing austenite is achieved, and meanwhile, the B element can effectively improve the strength and the wear resistance of the steel. The B content of the invention is set to 0.0015-0.004%.
P, S: phosphorus and sulfur are both unavoidable impurity elements in steel, and the existence of the two elements is acceptable for the strength and wear resistance of the steel, the content of the phosphorus and the sulfur should be reduced as much as possible under the conditions of acceptable cost and allowable process conditions, and the phosphorus content is limited to below 0.05% and the sulfur content is limited to below 0.03% due to the cost factors and the manufacturing conditions.
By the compounding of the above elements and the atomization after the steel is melted, it is sufficient to obtain shot having high wear resistance of room temperature austenite structure, but as described above, the cooling rate of the atomization process is too high, resulting in the chipping of the shot easily caused by collision during the subsequent use. The inventor of the invention can ensure that the shot body can still ensure good integrity even if the shot and the metal surface or the shot collide repeatedly for a long time at high speed in the subsequent use process while ensuring that the shot body has a room-temperature austenitic structure by combining specific shot components and reasonably controlling the cooling speed through continuous fumbling in actual production, thereby ensuring that the shot body is not broken after long-term use of the shot body and has satisfactory service life.
In practice, the cooling rate is extremely high in the atomization process, and the control of the cooling rate in a proper range is difficult in the atomization process, so the invention proposes quenching treatment of the shot after the shot is prepared by atomization, and the cooling rate is controlled in the quenching stage, thereby ensuring that the shot body is complete and not broken after long-term use on the basis of ensuring that the shot has room-temperature austenitic structure.
The inventors have found, based on trial and error, a section suitable for the quenching cooling rate of the shot peening composition of the present invention, namely V 1 ≤V≤V 2 Through experimental and inductive summaries, the inventors have derived: v (V) 1 =8.58*ln(103.8-11.27*[B]-5.78*[Mn]-3.16*[Cr]-1.88*[Si]-1.05*[Ni]-2.14*[C])+13.7；V 2 =37.5+3018*[B]-1.5*[Mn]+5.4*[Cr]-2.1*[Ni] -6.2*[Si]+37.9*[C]The method comprises the steps of carrying out a first treatment on the surface of the The inventors found that if the quenching cooling rate V < V 1 No shot blasting of a complete room temperature austenitic structure is obtained after quenching, and finally insufficient wear resistance of the shot blasting is caused; if the quenching cooling speed V is more than V 2 Then the shot blasting is found to be carried out subsequentlyThe risks and the probability of breakage and breakage of the pill body are increased in the using process, the requirement of long-time work cannot be met, and the service life is insufficient. The cooling speed of the shot with the composition of the invention is controlled at V in the subsequent quenching and cooling process 1 -V 2 The method can ensure that the room-temperature austenite structure is obtained, so that the shot blasting has excellent wear resistance, and can ensure that the shot blasting is not easy to damage and crack in the use process, thereby greatly prolonging the service life of the shot blasting.
As described above, the shot of the present invention has an austenitic structure at room temperature. After atomization, the shot diameter obtained by the invention is 0.5-6mm, the atomization is preferably gas atomization, and the gas atomization atmosphere is preferably non-oxidizing atmosphere, such as N 2 、Ar、N 2 And Ar. As a further description, the shot of the present invention is kept in the quenching treatment after atomization and shot making for a period of 5 to 60 minutes to ensure that a fully austenitic structure is obtained before quenching.
As a further option, the invention has excellent abrasive resistance and service life of shot blasting, and is particularly suitable for surface modification or surface cleaning of metal materials. The surface modification can be surface hardening, and the surface cleaning at least comprises cleaning operations such as surface oxide removal, surface polishing, surface rust removal, surface coating removal and the like.
It should be noted that the quenching process does not need tempering or annealing and other processes, and the shot blasting in the quenched state can be directly used as corresponding working conditions.
The beneficial effects of the invention are as follows.
The invention can ensure that the shot blasting has room temperature austenite structure by controlling the components, adding the quenching process after atomizing and making the shot and controlling the quenching cooling speed, so that the shot blasting has excellent wear resistance, and the shot body is not damaged or broken after long-term use, so that the service life is long. The shot blasting method is suitable for working conditions such as surface hardening and surface cleaning.
Detailed Description
In order to enable those skilled in the art to fully understand the technical scheme and the beneficial effects of the present invention, the following description is made with reference to specific test examples.
Molten steel was melted according to the composition of table 1, P and S were controlled to be qualified at 0.02% ± 0.005%, and Ar atomization shot was performed, and the shot thus obtained was screened, and shot having a diameter of 3-4mm was selected for subsequent quenching (no quenching in the partial composition), and thereafter, the shot was subjected to a wear resistance simulation test and a life simulation test, and the relevant quenching parameters and simulation test results are shown in table 2.
(1) Abrasion resistance simulation test
Taking 100 shot blasting with smooth and intact surface from each group of samples, and weighing the initial weight W 0 Ball milling with 100 zirconia balls of 3-4mm diameter in planetary ball mill at 300rpm for 5 hr, washing with deionized water, stoving, weighing the weight W of the ball blast 1 Wear resistance (i.e. weight loss) r= (W) 0 -W 1 )/W 0 * The smaller the R value is 100%, the better the abrasion resistance is, and the samples with the R value less than or equal to 5% are considered to meet the abrasion resistance requirement of the invention.
(2) Life simulation test
Taking 100 shot with smooth and intact surfaces from each group of samples, placing the shot in a vibration ball mill, carrying out vibration ball milling for 90 minutes at the frequency of 800 weeks/min under the condition of not placing ball grinding balls, then taking out the shot, visually observing and counting the shot quantity N with defects or damages on the surfaces, wherein the smaller the N is, the longer the service life of the shot is, and the samples with the N value less than or equal to 5 are considered to meet the service life requirement of the invention.
The composition (in mass%) of each shot in Table 1.
Table 2 quenching parameters and performance test results for each shot.
Specific analyses are described below with reference to tables 1 and 2.
First, the influence of the quenching process after atomization and pelleting on the shot blasting performance is analyzed.
The shot peening compositions of test numbers 1-8 all meet the composition requirements of the present invention, but the subsequent treatment process is different, resulting in a difference in final shot peening performance.
As for comparative examples 1-2 and 2-2, which are the same in composition, quenching temperature and holding time as in examples 1-1 and 2-1, respectively, and since the cooling rate after quenching is lower than V required by the invention 1 Although the life simulation test result of shot blasting can meet the invention requirement, the wear resistance is poor and cannot meet the invention requirement.
As for comparative examples 1-3 and 2-3, the compositions and quenching temperatures and holding times were the same as those of examples 1-1 and 2-1, respectively, and the cooling rates after quenching were higher than V required by the invention 2 Although the abrasion resistance of shot blasting is good, the number of broken or cracked shots in the life simulation test is large, and the invention requirement cannot be satisfied.
In comparative examples 3-2 and 4-2, which were identical in composition to examples 3-1 and 4-1, respectively, the quenching operation after atomization and pelleting was not performed, but although the abrasion resistance of shot blasting was good, the number of pellets which were finally broken or chipped in the life simulation test was large, and the requirements of the invention could not be satisfied.
Comparative examples 7-1 and 8-1, which were identical in composition, quenching temperature and holding time to those of examples 7-2 (7-3) and 8-2 (8-3), respectively, and since the cooling rate after quenching was lower than V required by the invention 1 Although the life simulation test result of shot blasting can meet the invention requirement, the wear resistance is poor and cannot meet the invention requirement.
Comparative examples 7-4 and 8-4, which were identical in composition, quenching temperature and holding time to those of examples 7-2 (7-3) and 8-2 (8-3), respectively, and since the cooling rate after quenching was higher than V required by the invention 2 Although the abrasion resistance of shot blasting is good, the number of broken or cracked shot bodies in the life simulation test is large, and the requirement of the invention cannot be met。
It is found that the quenching is performed after the atomization and pelleting, and the quenching cooling speed is controlled within a reasonable range, so that the shot blasting can be ensured to have excellent wear resistance and service life.
Secondly, the important effect of matching between the shot peening composition and the quenching cooling speed on obtaining the abrasion-resistant long-life shot peening is analyzed and explained.
Comparative examples 9, 11, 13, 15, 17, 19 are comparative examples of examples 1, 2, 3, 4, 5, 6, respectively, each of which was changed in C, si, mn, cr, ni, B content from the corresponding example, the content ranges of the above elements after the change were all lower than the requirements of the invention, and the quenching cooling rate thereof could still satisfy V calculated according to the invention 1 -V 2 However, even if the quenching cooling rate range proposed according to the present invention is cooled at this time, it eventually makes it impossible to obtain satisfactory wear resistance.
Comparative examples 10, 12, 14, 16, 18, 20 are comparative examples of examples 1, 2, 3, 4, 5, 6, respectively, each of which was changed in C, si, mn, cr, ni, B content from the corresponding example, the content ranges of the above elements after the change were all higher than the requirements of the invention, and the quenching cooling rate could still satisfy V calculated according to the invention 1 -V 2 However, in this case, even if the cooling is performed in the quenching cooling rate range according to the present invention, the number of broken or cracked pellets in the final life simulation test is large, and the requirements of the present invention cannot be satisfied.
Therefore, the quenching cooling speed of the invention needs to be matched with components, so that the shot blasting meeting the requirements of the invention on wear resistance and service life can be finally obtained, and even if the components outside the range of the invention are quenched and cooled, the shot blasting meeting the requirements of the invention still can not be finally obtained.
The inventor of the invention optimizes the components of the shot blasting, increases the quenching process after atomizing and making the shot, controls the quenching cooling speed, simultaneously summarizes and summarizes to obtain the quenching cooling speed suitable for the components of the invention, combines the optimized adjustment of the components and the parameter control of the process steps, and finally obtains the shot blasting with wear resistance and service life.
The above description of the embodiments is only for aiding in the understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The wear-resistant long-life shot blasting is characterized by comprising the following components in percentage by mass: c:0.55-1.0%, si:0.25-0.65%, mn:5.8-10.5%, cr:3.0-7.0%, ni:5.6-8.4%, B:0.0015 to 0.004 percent, P: less than 0.05%, S: less than 0.03%, and the balance being Fe and unavoidable impurities;
carrying out water atomization or gas atomization on molten steel with the components to obtain shot blasting, heating the shot blasting to 820-900 ℃ for heat preservation, quenching to room temperature, and quenching cooling at the speed V 1 ≤V≤V 2 Unit is ℃/s, wherein:
V 1 =8.58*ln(103.8-11.27*[B]-5.78*[Mn]-3.16*[Cr]-1.88*[Si]-1.05*[Ni]-2.14*[C])+13.7；
V 2 =37.5+3018*[B]-1.5*[Mn]+5.4*[Cr]-2.1*[Ni] -6.2*[Si]+37.9*[C]；
wherein [ C ], [ Si ], [ Mn ], [ Cr ], [ Ni ], [ B ] respectively represent the mass percent of C, si, mn, cr, ni, B.
2. The wear resistant long life shot of claim 1 wherein said shot has an austenitic structure at room temperature.
3. The wear-resistant long life shot of claim 1 wherein said shot diameter is 0.5-6mm.
4. The wear-resistant long life shot-blasting according to claim 1, wherein said holding time is 5-60min.
5. The wear resistant long life shot of claim 1 wherein said gas atomization employs a non-oxidizing gas.
6. The wear-resistant long life shot-blasting according to claim 1, wherein said non-oxidizing gas is N 2 Or Ar or N 2 And Ar.
7. The wear-resistant long life shot of claim 1, wherein the wear-resistant long life shot is applied to surface hardening or surface cleaning of a metallic material.
8. The wear resistant long life peen according to claim 1 wherein said surface cleaning includes removal of surface scale, surface polishing, surface derusting, removal of surface coatings, and the like.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311656479.XA CN117660840A (en) | 2023-12-05 | 2023-12-05 | Wear-resistant shot blasting with long service life |
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|---|---|---|---|
| CN202311656479.XA CN117660840A (en) | 2023-12-05 | 2023-12-05 | Wear-resistant shot blasting with long service life |
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| CN117660840A true CN117660840A (en) | 2024-03-08 |
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| CN202311656479.XA Pending CN117660840A (en) | 2023-12-05 | 2023-12-05 | Wear-resistant shot blasting with long service life |
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- 2023-12-05 CN CN202311656479.XA patent/CN117660840A/en active Pending
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