CN101337338A - Reinforced steel shot - Google Patents
Reinforced steel shot Download PDFInfo
- Publication number
- CN101337338A CN101337338A CNA2008101237343A CN200810123734A CN101337338A CN 101337338 A CN101337338 A CN 101337338A CN A2008101237343 A CNA2008101237343 A CN A2008101237343A CN 200810123734 A CN200810123734 A CN 200810123734A CN 101337338 A CN101337338 A CN 101337338A
- Authority
- CN
- China
- Prior art keywords
- reinforced steel
- steel shot
- hardness
- shot
- wire drawing
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 54
- 239000010959 steel Substances 0.000 title claims abstract description 54
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 7
- 239000011574 phosphorus Substances 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 239000010703 silicon Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 238000005491 wire drawing Methods 0.000 claims description 17
- 238000012216 screening Methods 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 11
- 229910000639 Spring steel Inorganic materials 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000005864 Sulphur Substances 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 239000011572 manganese Substances 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 5
- 238000005728 strengthening Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 238000005422 blasting Methods 0.000 abstract description 2
- 238000004381 surface treatment Methods 0.000 abstract 2
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract 1
- 229910052717 sulfur Inorganic materials 0.000 abstract 1
- 239000011593 sulfur Substances 0.000 abstract 1
- 239000006187 pill Substances 0.000 description 18
- 239000004744 fabric Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000007873 sieving Methods 0.000 description 7
- 230000004087 circulation Effects 0.000 description 6
- 239000002245 particle Substances 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 206010019133 Hangover Diseases 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005480 shot peening Methods 0.000 description 1
- 238000012956 testing procedure Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Steel (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a reinforced steel shot, which relates to a metal product, in particular to a shot blasting for metal surface treatment. The method is characterized in that: the weight percentage composition of the alloy is 0.45-0.85% of carbon, 0.30-1.30% of manganese, 0.15-0.35% of silicon, less than or equal to 0.050% of sulfur, less than or equal to 0.040% of phosphorus, and the balance of iron and inevitable impurities; the average hardness measured under load was 640 HV. + -. 30HV, and the range of hardness variation was. + -. 25 HV. The reinforced steel shot provided by the invention has the advantages that: the consistency of density and element proportion is high, and the hardness deviation ratio is small; no hollow and surface crack phenomena, small surface shape difference, high surface strength and good durability. The reinforced steel shot provided by the invention is particularly suitable for surface treatment of high-end workpieces.
Description
Technical field
The present invention relates to a kind of metal product, especially a kind of ball blast that is used for Treatment of Metal Surface.
Technical background
The ball blast products such as shot, cast steel ball or reinforced steel shot that China produces and uses at present, its production technology mainly contains two kinds, and the one, from steel scrap and iron mud, extract, the 2nd, by atomizing type production.By the ball blast of this dual mode production gained, its major defect is that element ratio is not easy control, and the hardness deviation is big.Simultaneously, the density of ball blast, surface configuration deviation are also very big, and this class ball blast also is easy to generate hollow and the crizzle phenomenon.Therefore this class ball blast product resistance to impact and rub resistance in ball blast or shot-peening process is not enough, and broken easily, service life is short.During especially for the impeller blasting of high strength steel and intensive treatment, as when being used for industry Treatment of Metal Surface such as big aircraft manufacturing, space flight and aviation, automobile, motorcycle, shipbuilding, transmission device, spring manufacturing, shortcoming is particularly outstanding, to changing the surface of the work stress state, making wearability and the such invigoration effect of fatigue resistance that surface of the work hardens, improves part not have due effect.
Summary of the invention
The objective of the invention is to overcome above-mentioned defective, provide a kind of surface strength height, good endurance, hardness deviation little, be applicable to the reinforced steel shot that high-end surface of the work is handled.
Technical solution of the present invention is:
Reinforced steel shot, its weight percent consists of carbon 0.45～0.85%, manganese 0.30～1.30%, silicon 0.15～0.35%, sulphur≤0.050%, phosphorus≤0.040%, surplus is iron and unavoidable impurities.
Described reinforced steel shot best group becomes carbon 0.75～0.80%, manganese 0.48～0.58%, and silicon 0.22～0.26%, sulphur 0.001～0.006%, phosphorus 0.011～0.015%, surplus is iron and unavoidable impurities.
The average hardness that described reinforced steel shot load is measured down is 640HV ± 30HV.
Described reinforced steel shot hardness deviation range is ± 25HV.
The preparation method of described reinforced steel shot is:
Select materials → wire drawing → cutting → screening → detection → warehouse-in,
Or: select materials → wire drawing → cutting → surperficial rounding reinforcement → screening → detection → warehouse-in.
Described selecting materials refers to select for use the elemental composition ratio consistent with the finished product reinforced steel shot, and the carbon spring steel wires of hardness deviation in finished product reinforced steel shot standard hardness ± 50HV scope is for producing raw material.Described wire drawing refers to by the product specification requirement raw material be carried out 3～5 times wire drawing, the carbon spring steel wires wire drawing is become the cylindrical steel wire of different size between 0.2～3 millimeter.Described cutting refers to that Cutting Length is consistent with the diameter of cylindrical steel wire with the small cylinder segment of cylindrical steel wire cut growth degree unanimity.Described surperficial rounding strengthen be meant adopt the rounding strengthening device to cylinder segment clash into rounding and strengthen with bump.Described screening refers to carry out 2～3 screenings by the dimensions requirement.Described detection refers to that hardness and durability detect.
The advantage of reinforced steel shot provided by the invention is: because reinforced steel shot adopts the elemental composition ratio section bar carbon spring steel wires consistent with the finished product reinforced steel shot is that raw material produces, so density, the element ratio uniformity height of reinforced steel shot, the hardness deviation ratio is less; Because the production technology of reinforced steel shot is
Select materials → wire drawing → cutting → screening → detection → warehouse-in,
Or: select materials → wire drawing → cutting → surperficial rounding reinforcement → screening → detection → warehouse-in.
Therefore the gained reinforced steel shot can not occur hollow and the face crack phenomenon, and surface configuration difference is little, surface strength height, good endurance.Utilizing reinforced steel shot provided by the invention to be specially adapted to high-end surface of the work handles.
The specific embodiment
A kind of reinforced steel shot, its weight percent consists of carbon 0.75～0.80%, manganese 0.48～0.58%, silicon 0.22～0.26%, sulphur 0.001～0.006%, phosphorus 0.011～0.015%, surplus is iron and unavoidable impurities.
Average hardness is 640HV, and the hardness deviation range is ± 25HV.
Reinforced steel shot can be divided into four classes according to shape:
Column type---code name is Z;
Ellipse---code name is G1;
Accurate ball-type---code name is G2;
Ball-type---code name is G3.
The production technology of above-mentioned reinforced steel shot is:
Select materials → wire drawing → cutting → screening → detection → warehouse-in,
Or: select materials → wire drawing → cutting → surperficial rounding reinforcement → screening → detection → warehouse-in.
Wherein select materials be meant select for use the elemental composition ratio by weight percentage composition be carbon 0.75～0.80%, manganese 0.48～0.58%, silicon 0.22～0.26%, sulphur 0.001～0.006%, phosphorus 0.011～0.015%, surplus is that the carbon spring steel wires of iron and unavoidable impurities is the production raw material, and its hardness range is 640 ± 50HV.
Wire drawing is meant carries out 3～5 times wire drawing by the product specification requirement to raw material, the carbon spring steel wires wire drawing is become the cylindrical steel wire of different size between 0.2～3 millimeter;
Cutting is meant that Cutting Length is consistent with the diameter of cylindrical steel wire with the small cylinder segment of filament cutter with cylindrical steel wire cut growth degree unanimity, and the shearing section requires smooth, no burr, do not have hangover.
Surface peening be meant adopt strengthening device to cylinder segment clash into reinforcement.Strengthening device makes the speed ejaculation of cylinder segment with 60～100 meter per seconds, strengthens chamber interior walls through 30～80 meters distance back bump, controls according to the difference of clashing into enhanced time repeatedly and strengthens shape and hardness.
It is as follows to strengthen the concrete time:
Z:0 minute
G1:30～60 minute
G2:60～90 minute
G3:80～120 minute
The hardness level of reinforced steel shot and hardness range:
The method and the step of screening are:
1, first sieve: dimensions is in particle deviation+0.1 millimeter, and promptly sieve diameter is standard size specification+0.1 millimeter;
2, second sieve: dimensions is a standardized product, the particle deviation is approximately+and 0.00 millimeter, promptly sieve diameter is the standard size specification;
3, the 3rd sieve: dimensions is-0.1 millimeter in the particle deviation, and promptly sieve diameter is a standard size specification-0.1 millimeter;
4, remove the irregular product of surface configuration, pill amplifies 25 times of range estimations, does not conform to rate≤0.3%.
Attached: last sieving rate: Z≤0.7%, G1≤0.5%, G2≤0.5%, G3≤0.5%.Pill standard size specification limit: 0.20～2.00 millimeter.
The method of testing of staying sieve rate and sieving rate on first, second and third sieve:
X sieve stay the sieve rate---through remaining in the percentage that residue on the screen cloth accounts for gross sample after the screen cloth screening.
The sieving rate of X sieve---account for the percentage of gross sample through the sieving that is fallen by sieve by screen cloth after the screen cloth screening.
Get about about 1 kilogram of tested reinforced steel shot, be not less than on 0.1 balance that restrains at weighing precision and weigh up the total weight of sample, be placed on then in the first order screen cloth and sieve, collect the residue that remains on the screen cloth.Place it on the balance and weigh, obtain first sieve and stay sieve rate percentage by weight, after this first order being sieved thing puts into second level screen cloth again and sieves, the residue that remains in second screen cloth is weighed once more, and that obtains second level sieve stays sieve rate percentage by weight, by that analogy, sieving is sieved in the second level to be put in the third level screen cloth again and to sieve, that collects the 3rd sieve stays sieve residue and sieved material, places it on the balance, and that obtains the 3rd sieve stays sieve rate and sieving rate total amount percentage.Whole test process can be placed on the last test of the overlapping automatic screen-dividing machine of three sieves.
Example: measuring nominal dimension is 1.0 millimeters reinforced steel shot Size Distribution.
Measurer: each one of grade III Standard screen cloth, 0.9 millimeter of first sieve, 1.00 millimeters of second sieves, 1.10 millimeters of the 3rd sieves, and a non-mesh container, precision is not less than one of 0.1 gram weigh scale.
Testing procedure:
Randomly draw one kilogram of reinforced steel shot, can extract the specimen of more multiple amount to the bigger reinforced steel shot of specification.
First, second and third clean sieve and atresia receptacle string on vibrating scalper automatically, are allowed to adopt manual method.
The gross sample reinforced steel shot is poured in first sieve, machined and sieve, or manually sieve.
On balance, weigh respectively first the sieve in residue, second the sieve in residue, the 3rd the sieve in residue and sieving (both residues in the atresia container).
With its respectively call oneself weight divided by the gross weight of initial draw samples, draw its Size Distribution percentage by weight.
Hardness detection method:
Collect 100 pills at random, inlay, inlay temperature and be no more than 120 degrees centigrade, inlay and use grinder buffing after finishing, make 1/3rd places of pill exposure near pill nominal diameter size, with red sand paper the pill face is polished then, sand papering system ladder process is used wet-milling, prevent the pill hot-spot, to center on this flour milling 20 press its Vickers hardness of GB/14340 standard testing then, 0.4 millimeter load of pellet size is 4.90 newton (0.5 kilograms), pellet size 0.5-1.2 millimeter load is 9.81 newton (1.0 kilograms), each pill is surveyed a bit, get arithmetic mean of instantaneous value after 20 hardness number additions, and its any test value must be in this grade hardness range of regulation.
Durability test method:
Random sampling 500 gram pills and standby 100 gram pills from tested pill, 100 gram pills are all put into Ervin (Ai Wen) testing machine to be tested, Ervin (Ai Wen) testing machine is established 500 and is transferred a circulation to, if get little pill and the dust that dress is tested pill with 0.2 millimeter standard separating sieve sieve of nominal diameter after the cyclic test, replenish the pill weight of its loss with standby pill, and the like continue cyclic test and reach 100 grams until loss pill weight, calculate that thus the revolution that weightless 100 gram pills make is decided to be durability.
The calculating of durability formula is:
Accumulative total circulation rotation total revolution-[(the last circulation losses weight of 500 ÷) * (stack loss gross weight-100)]
Example: sample thief 500 restrains and backs up 100 grams, be provided with per 500 and transfer a circulation to, nine circulations of corotation when the gross weight loss surpasses 100 grams, meter 4500 changes, last circulation losses is 25 grams, and final loss gross weight is 118.6 grams, calculates when loss to 100 just restrains, the revolution that is changeed, the both durability of reinforced steel shot.
450-[(500÷25)×(118.6-100)]
＝4500-20×18.6
＝4500-372
＝4128
That is: 4128 is exactly the durability of this sample
Obtain finished product related data such as following table at last:
Claims (6)
1, a kind of reinforced steel shot is characterized in that: its weight percent consists of carbon 0.45～0.85%, manganese 0.30～1.30%, and silicon 0.15～0.35%, sulphur≤0.050%, phosphorus≤0.040%, surplus is iron and unavoidable impurities.
2, according to the described a kind of reinforced steel shot of claim 1, it is characterized in that: the average hardness that described reinforced steel shot load is measured down is 640HV ± 30HV.
3, according to the described a kind of reinforced steel shot of claim 1, it is characterized in that: described reinforced steel shot hardness deviation range is ± 25HV.
4, according to the described a kind of reinforced steel shot of claim 1, it is characterized in that: described reinforced steel shot weight percent consists of carbon 0.75～0.80%, manganese 0.48～0.58%, silicon 0.22～0.26%, sulphur 0.001～0.006%, phosphorus 0.011～0.015%, surplus is iron and unavoidable impurities.
5, according to claim 1 or 4 described a kind of reinforced steel shots, it is characterized in that: the preparation method of described reinforced steel shot is:
Select materials → wire drawing → cutting → screening → detection → warehouse-in,
Or: select materials → wire drawing → cutting → surperficial rounding reinforcement → screening → detection → warehouse-in.
6, according to the described a kind of reinforced steel shot of claim 5, it is characterized in that: described selecting materials refers to select for use the elemental composition ratio consistent with the finished product reinforced steel shot, and the carbon spring steel wires of hardness deviation in finished product reinforced steel shot standard hardness ± 50HV scope is for producing raw material; Described wire drawing refers to by the product specification requirement raw material be carried out 3～5 times wire drawing, the carbon spring steel wires wire drawing is become the cylindrical steel wire of different size between 0.2～3 millimeter; Described cutting refers to that Cutting Length is consistent with the diameter of cylindrical steel wire with the small cylinder segment of cylindrical steel wire cut growth degree unanimity; Described surperficial rounding strengthen be meant adopt the rounding strengthening device to cylinder segment clash into rounding and strengthen with bump; Described screening refers to carry out 2～3 screenings by the dimensions requirement.Described detection refers to that hardness and durability detect.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008101237343A CN100486773C (en) | 2008-05-30 | 2008-05-30 | Reinforced steel shot |
| PCT/CN2009/000572 WO2009143697A1 (en) | 2008-05-30 | 2009-05-25 | Steel shot grain and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008101237343A CN100486773C (en) | 2008-05-30 | 2008-05-30 | Reinforced steel shot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101337338A true CN101337338A (en) | 2009-01-07 |
| CN100486773C CN100486773C (en) | 2009-05-13 |
Family
ID=40211582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2008101237343A Expired - Fee Related CN100486773C (en) | 2008-05-30 | 2008-05-30 | Reinforced steel shot |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100486773C (en) |
| WO (1) | WO2009143697A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101698924B (en) * | 2009-09-29 | 2012-08-29 | 昆山新浦瑞金属材料有限公司 | Steel shot used for cleaning and strengthening surface of metal and preparation method thereof |
| CN101698923B (en) * | 2009-09-29 | 2012-08-29 | 昆山新浦瑞金属材料有限公司 | Steel shot and preparation method thereof |
| CN102717340A (en) * | 2012-04-13 | 2012-10-10 | 大丰市大奇金属磨料有限公司 | Nickel base projectile and preparation method thereof |
| CN104924220A (en) * | 2015-04-23 | 2015-09-23 | 共享铸钢有限公司 | Method for cleaning surface of large stainless steel casting |
| CN114131515A (en) * | 2021-12-03 | 2022-03-04 | 山西柴油机工业有限责任公司 | Shot blasting medium |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100486773C (en) * | 2008-05-30 | 2009-05-13 | 大丰市大奇金属磨料有限公司 | Reinforced steel shot |
| CN102031345A (en) * | 2009-09-28 | 2011-04-27 | 天津市新潮铸钢磨料厂 | Process for manufacturing rounding steel shots for clearing and de-rusting by using special steel wires for tyres |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63196380A (en) * | 1987-02-10 | 1988-08-15 | Ito Kiko Kk | Manufacture of shot grain |
| JPH02228448A (en) * | 1989-02-28 | 1990-09-11 | Daido Steel Co Ltd | High strength and high toughness steel shot |
| JPH03253544A (en) * | 1990-03-01 | 1991-11-12 | Daido Steel Co Ltd | High-hardness wire steel product for shot grain |
| JP2619339B2 (en) * | 1990-03-30 | 1997-06-11 | トヨタ自動車株式会社 | Manufacturing method of iron-based shot grains |
| JPH04189470A (en) * | 1990-11-20 | 1992-07-07 | Kobe Steel Ltd | Steel shot grain and manufacture thereof |
| JPH04310371A (en) * | 1991-04-05 | 1992-11-02 | Nippon Steel Corp | Manufacture of high-strength long-life shot ball |
| CN1107738C (en) * | 2000-12-14 | 2003-05-07 | 杨继玉 | Alloy reinforced cast steel ball |
| CN1180118C (en) * | 2002-04-28 | 2004-12-15 | 舒克东 | Stainless steel ball |
| KR100469671B1 (en) * | 2002-07-11 | 2005-02-02 | 삼화강봉주식회사 | Quenched and tempered steel wire with superior characteristics of cold forging |
| CN1205348C (en) * | 2003-03-31 | 2005-06-08 | 孙荣玖 | Wear resistant steel ball production process |
| JP4752635B2 (en) * | 2006-06-15 | 2011-08-17 | 住友金属工業株式会社 | Method for manufacturing soft nitrided parts |
| CN101152706B (en) * | 2006-09-26 | 2010-09-22 | 淄博大亚金属制品有限公司 | Bainitic steel ball and production technique |
| CN100464940C (en) * | 2007-05-15 | 2009-03-04 | 山东东阿钢球集团有限公司 | Method for producing accurate steel balls |
| CN100486773C (en) * | 2008-05-30 | 2009-05-13 | 大丰市大奇金属磨料有限公司 | Reinforced steel shot |
-
2008
- 2008-05-30 CN CNB2008101237343A patent/CN100486773C/en not_active Expired - Fee Related
-
2009
- 2009-05-25 WO PCT/CN2009/000572 patent/WO2009143697A1/en active Application Filing
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101698924B (en) * | 2009-09-29 | 2012-08-29 | 昆山新浦瑞金属材料有限公司 | Steel shot used for cleaning and strengthening surface of metal and preparation method thereof |
| CN101698923B (en) * | 2009-09-29 | 2012-08-29 | 昆山新浦瑞金属材料有限公司 | Steel shot and preparation method thereof |
| CN102717340A (en) * | 2012-04-13 | 2012-10-10 | 大丰市大奇金属磨料有限公司 | Nickel base projectile and preparation method thereof |
| CN104924220A (en) * | 2015-04-23 | 2015-09-23 | 共享铸钢有限公司 | Method for cleaning surface of large stainless steel casting |
| CN114131515A (en) * | 2021-12-03 | 2022-03-04 | 山西柴油机工业有限责任公司 | Shot blasting medium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009143697A1 (en) | 2009-12-03 |
| CN100486773C (en) | 2009-05-13 |
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