CN103757547A - Cast steel material for composite roll ring and preparation method thereof - Google Patents
Cast steel material for composite roll ring and preparation method thereof Download PDFInfo
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- CN103757547A CN103757547A CN201310701532.3A CN201310701532A CN103757547A CN 103757547 A CN103757547 A CN 103757547A CN 201310701532 A CN201310701532 A CN 201310701532A CN 103757547 A CN103757547 A CN 103757547A
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- composite roll
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- 239000000463 material Substances 0.000 title claims abstract description 18
- 229910001208 Crucible steel Inorganic materials 0.000 title claims abstract description 17
- 239000002131 composite material Substances 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000007670 refining Methods 0.000 claims abstract description 19
- 239000011651 chromium Substances 0.000 claims abstract description 13
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 12
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000005266 casting Methods 0.000 claims abstract description 11
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 9
- 239000010955 niobium Substances 0.000 claims abstract description 9
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 229910052729 chemical element Inorganic materials 0.000 claims abstract description 7
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 7
- 239000010937 tungsten Substances 0.000 claims abstract description 7
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 7
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 7
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 4
- 239000011733 molybdenum Substances 0.000 claims abstract description 4
- 238000005275 alloying Methods 0.000 claims description 13
- 238000010792 warming Methods 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 229910000805 Pig iron Inorganic materials 0.000 claims description 6
- 239000012467 final product Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 3
- 235000002918 Fraxinus excelsior Nutrition 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- 239000002956 ash Substances 0.000 claims description 3
- 229910021538 borax Inorganic materials 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 239000000470 constituent Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 claims description 3
- 230000023556 desulfurization Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 claims description 3
- 229910000514 dolomite Inorganic materials 0.000 claims description 3
- 239000010459 dolomite Substances 0.000 claims description 3
- 239000010977 jade Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 3
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 3
- 239000004328 sodium tetraborate Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 239000000956 alloy Substances 0.000 abstract description 4
- 229910045601 alloy Inorganic materials 0.000 abstract description 3
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 2
- 229910000677 High-carbon steel Inorganic materials 0.000 abstract description 2
- 229910000997 High-speed steel Inorganic materials 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical group [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 229910052688 Gadolinium Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- PVGBHEUCHKGFQP-UHFFFAOYSA-N sodium;n-[5-amino-2-(4-aminophenyl)sulfonylphenyl]sulfonylacetamide Chemical compound [Na+].CC(=O)NS(=O)(=O)C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=C1 PVGBHEUCHKGFQP-UHFFFAOYSA-N 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
Abstract
The invention discloses a cast steel material for a composite roll ring. The cast steel material comprises the following chemical elements by mass percent: 0.8-0.9 % of carbon, 1.2-1.5% of tungsten, 1.5-2.5% of molybdenum, 1.5-2.5% of vanadium, 2.2-2.5% of chromium, 0.05-0.10% of niobium, 0.1% of rare earth, 0.004-0.007% of Mg, 0.02-0.05% of Al, not more than 0.030% of P, not more than 0.030% of S, and the balance of iron. A plurality of alloy elements such as rare earth, Al and niobium are added on the basis of high-carbon steel, the heat treatment temperature after casting is reasonably controlled in a secondary refining manner, and the raw materials are fed in batches, so that the alloy steel has the characteristics of high-speed steel, is heat-resisting, high in red hardness, good in matching of rigidity and tenacity, good in abrasive resistance, high in hardness, and impact resistant, and is applicable to a roll ring of a roller of a wire processing machine, low in cost and durable. A part of scrap iron is used as a raw material, so that the alloy is stable and uniform in quality.
Description
Technical field
The present invention relates to roll technology field, relate in particular to cast steel material and preparation method thereof for a kind of composite roll collars.
Background technology
Roll is the central module of wire rod machine, and gadolinium part is carried out to gadolinium processing processed, makes metal produce the main tool of viscous deformation.Roll working load is large, bears very large gadolinium pressing pressure and torsional moment, and has very strong shock load and very large mass force; In addition, the Working environment of roll is harsh, bear very high temperature, has again water coolant, is in the cold and hot lower work that accompanies each other, serious wear.
High carbon and chromium cast steel, the several types such as ordinary steel and Wimet.High carbon and chromium cast steel is owing to there being certain wear resistance, and low price, is therefore widely used, and high carbon and chromium running roller has 13Cr13WMoV and 18Cr20WMoV with the conventional material of steel.Because these two kinds of steel hardness and wear resistance mainly rely on the carbide Cr of chromium
7c
3and Cr
23c
6, thermostability is poor, generally at 450 ℃, starts above agglomeration and softening gradually.In the time of 550 ℃, hardness will be down to below HRC50.And the temperature of wire rod running roller under operation can reach 550 ℃ of left and right, this just makes running roller obviously reduce work-ing life.The secondary hardening temperature of ordinary steel is 550 ℃ of left and right, and hardness maintains HRC62 ~ 64, can improve significantly the work-ing life of running roller; Wimet also has good hot hardness and wear resistance.But because the manufacturing cost of ordinary steel and Wimet is too high, in the use of high line running roller material, be restricted.Therefore study excellent performance, the roll material that cost is cheaper just seems particularly important.
Summary of the invention
The object of the present invention is to provide cast steel material and preparation method thereof for a kind of composite roll collars, this alloy material has advantages of that tensile strength is high, shock-resistant, wear-resisting.
Technical scheme of the present invention is as follows:
A composite roll collars cast steel material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.8-0.9, tungsten 1.2-1.5, molybdenum 1.5-2.5, vanadium 1.5-2.5, chromium 2.2-2.5, niobium 0.05-0.10, rare earth 0.1, Mg0.004-0.007, Al0.02-0.05, P≤0.030, S≤0.030, surplus are iron.
The production method of cast steel material for described composite roll collars, is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:1-2 ratio, the pig iron is added to drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) vanadium, chromium, rare earth; (2) tungsten, niobium; (3) other remaining components; The timed interval that each batch drops into element is 23-26 minute, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 200-210 ℃/h of speed, be warming up to 750-760 ℃, then be cooled to 650-660 ℃ with 180-190 ℃/h of speed, then be warming up to 930-940 ℃ with 200-210 ℃/h of speed, insulation 4-5 hour; With 180-190 ℃/h of speed, be cooled to 580-590 ℃ again, insulation 40-50 minute, then with 180-190 ℃/h of speed, be cooled to 200-210 ℃, insulation 3-4 hour; With 100-110 ℃/h of speed, be warming up to 330-350 ℃ again, insulation 40-50 minute, then be warming up to 530-540 ℃ with 80-90 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
Described refining agent is made by the raw material of following weight part: instrument comminuted steel shot 3-5, clay 10-12, Sodium Silicofluoride 3-4, sodium carbonate 2-3, sodium tetraborate 1-2, stalk ashes 4-5, potassium felspar sand 36-40, jade powder 3-4, carclazyte 6-8, ground dolomite 3-4; Preparation method mixes each raw material, is heated to 2600-2900 ℃ to molten state, stirs 10-15 minute, is poured into Quench in pure water, then is ground into 100-200 order powder, washes with water for several times, dries and get final product.
Beneficial effect of the present invention
The present invention by adding the multiple alloying elements such as rare earth, Al, niobium on the basis of high carbon steel, and through secondary refining, rationally control casting postheat treatment temperature, throwing raw materials, makes steel alloy have the characteristic of rapid steel in batches, more high temperature resistant, red firmly higher, rigidity and toughness is worked good, wear resistance is good, hardness is high, shock-resistant, is suitable for the collars of the roll of wire rod machine, cost is lower, durable in use.The present invention uses part scrap iron as raw material, makes more stable uniform of alloy quality, improves comprehensive mechanical property.Refining agent of the present invention is for Foundry Production, and the degree of porosity obviously improving in yield rate, particularly foundry goods reduces 1-2 degree, can not produce pore at cast(ing) surface, and trapped oxide also obviously reduces, and oxide inclusion is 2 grades of left and right.
Embodiment
A composite roll collars cast steel material, chemical element composition and mass percent thereof that it contains are: carbon 0.8-0.9, tungsten 1.2-1.5, molybdenum 1.5-2.5, vanadium 1.5-2.5, chromium 2.2-2.5, niobium 0.05-0.10, rare earth 0.1, Mg0.004-0.007, Al0.02-0.05, P≤0.030, S≤0.030, surplus are iron.
Described composite roll collars is as follows by the production method of cast steel material:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:1.5 ratio, the pig iron is added to drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) vanadium, chromium, rare earth; (2) tungsten, niobium; (3) other remaining components; The timed interval that each batch drops into element is 25 minutes, after feeding intake, stirs.
Described casting postheat treatment is: first by room temperature, with 205 ℃/h of speed, be warming up to 755 ℃, then be cooled to 655 ℃ with 185 ℃/h of speed, then be warming up to 935 ℃ with 205 ℃/h of speed, be incubated 4.5 hours; With 185 ℃/h of speed, be cooled to 585 ℃ again, be incubated 45 minutes, then be cooled to 205 ℃ with 185 ℃/h of speed, be incubated 3.5 hours; With 105 ℃/h of speed, be warming up to 340 ℃ again, be incubated 45 minutes, then be warming up to 535 ℃ with 85 ℃/h of speed, be incubated 2.6 hours, take out air cooling and get final product.
Described refining agent by following weight part (kilogram) raw material make: described refining agent by following weight part (kilogram) raw material make: instrument comminuted steel shot 3, clay 10, Sodium Silicofluoride 4, sodium carbonate 2, sodium tetraborate 1, stalk ashes 4, potassium felspar sand 36, jade powder 3, carclazyte 6, ground dolomite 3; Preparation method mixes each raw material, is heated to 2600-2900 ℃ to molten state, stirs 10-15 minute, is poured into Quench in pure water, then is ground into 100-200 order powder, washes with water for several times, dries and get final product.
Composite roll collars of the present invention by the mechanical property of cast steel material is: tensile strength 978MPa, yield strength 879MPa, unit elongation 16%, relative reduction in area 35%, impact absorbing energy 53J, impelling strength 66J/cm2, hardness 281HB.
Claims (4)
1. a composite roll collars cast steel material, is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.8-0.9, tungsten 1.2-1.5, molybdenum 1.5-2.5, vanadium 1.5-2.5, chromium 2.2-2.5, niobium 0.05-0.10, rare earth 0.1, Mg0.004-0.007, Al0.02-0.05, P≤0.030, S≤0.030, surplus are iron.
2. the production method of cast steel material for composite roll collars according to claim 1, is characterized in that:
(1), preparing the pig iron and scrap iron originates as ferrous substrate in 1:1-2 ratio, the pig iron is added to drop in stove and melt, carry out desulfurization, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add scrap iron fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove, be: (1) vanadium, chromium, rare earth; (2) tungsten, niobium; (3) other remaining components; The timed interval that each batch drops into element is 23-26 minute, after feeding intake, stirs.
3. the production method of cast steel material for composite roll collars according to claim 2, it is characterized in that: described casting postheat treatment is: first by room temperature, with 200-210 ℃/h of speed, be warming up to 750-760 ℃, with 180-190 ℃/h of speed, be cooled to 650-660 ℃ again, with 200-210 ℃/h of speed, be warming up to 930-940 ℃ again, insulation 4-5 hour; With 180-190 ℃/h of speed, be cooled to 580-590 ℃ again, insulation 40-50 minute, then with 180-190 ℃/h of speed, be cooled to 200-210 ℃, insulation 3-4 hour; With 100-110 ℃/h of speed, be warming up to 330-350 ℃ again, insulation 40-50 minute, then be warming up to 530-540 ℃ with 80-90 ℃/h of speed, insulation 2-3 hour, takes out air cooling and get final product.
4. the production method of cast steel material for composite roll collars according to claim 2, is characterized in that: described refining agent is made by the raw material of following weight part: instrument comminuted steel shot 3-5, clay 10-12, Sodium Silicofluoride 3-4, sodium carbonate 2-3, sodium tetraborate 1-2, stalk ashes 4-5, potassium felspar sand 36-40, jade powder 3-4, carclazyte 6-8, ground dolomite 3-4; Preparation method mixes each raw material, is heated to 2600-2900 ℃ to molten state, stirs 10-15 minute, is poured into Quench in pure water, then is ground into 100-200 order powder, washes with water for several times, dries and get final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310701532.3A CN103757547B (en) | 2013-12-19 | 2013-12-19 | A kind of composite roll collar cast steel material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310701532.3A CN103757547B (en) | 2013-12-19 | 2013-12-19 | A kind of composite roll collar cast steel material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103757547A true CN103757547A (en) | 2014-04-30 |
| CN103757547B CN103757547B (en) | 2016-03-30 |
Family
ID=50524861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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| Country | Link |
|---|---|
| CN (1) | CN103757547B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0570882A (en) * | 1991-09-12 | 1993-03-23 | Mitsubishi Steel Mfg Co Ltd | Roughened roll for cold rolling |
| JP2000160283A (en) * | 1998-11-25 | 2000-06-13 | Sumitomo Metal Ind Ltd | Rolling mill roll excellent in wear resistance and heat crack resistance |
| US6171222B1 (en) * | 1992-06-19 | 2001-01-09 | Commonwealth Scientific Industrial Research Organisation | Rolls for metal shaping |
| CN1424423A (en) * | 2002-12-24 | 2003-06-18 | 西安交通大学 | High-speed steel roll ring and its production |
| CN101386960A (en) * | 2007-09-14 | 2009-03-18 | 日立金属株式会社 | Rolling roll |
| CN103397268A (en) * | 2013-07-01 | 2013-11-20 | 安徽三联泵业股份有限公司 | Wear-resistant cast steel and preparation method thereof |
| CN103451545A (en) * | 2013-08-07 | 2013-12-18 | 安徽蓝博旺机械集团合诚机械有限公司 | High-strength cast steel material for fork chuck of forklift and preparation method of high-strength cast steel material |
-
2013
- 2013-12-19 CN CN201310701532.3A patent/CN103757547B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0570882A (en) * | 1991-09-12 | 1993-03-23 | Mitsubishi Steel Mfg Co Ltd | Roughened roll for cold rolling |
| US6171222B1 (en) * | 1992-06-19 | 2001-01-09 | Commonwealth Scientific Industrial Research Organisation | Rolls for metal shaping |
| JP2000160283A (en) * | 1998-11-25 | 2000-06-13 | Sumitomo Metal Ind Ltd | Rolling mill roll excellent in wear resistance and heat crack resistance |
| CN1424423A (en) * | 2002-12-24 | 2003-06-18 | 西安交通大学 | High-speed steel roll ring and its production |
| CN101386960A (en) * | 2007-09-14 | 2009-03-18 | 日立金属株式会社 | Rolling roll |
| CN103397268A (en) * | 2013-07-01 | 2013-11-20 | 安徽三联泵业股份有限公司 | Wear-resistant cast steel and preparation method thereof |
| CN103451545A (en) * | 2013-08-07 | 2013-12-18 | 安徽蓝博旺机械集团合诚机械有限公司 | High-strength cast steel material for fork chuck of forklift and preparation method of high-strength cast steel material |
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| Publication number | Publication date |
|---|---|
| CN103757547B (en) | 2016-03-30 |
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Effective date of registration: 20190118 Address after: 610000 5th Floor, Xiongfei Center, No. 1 Tidu Street, Qingyang District, Chengdu City, Sichuan Province Patentee after: Wang Yajun Address before: 230022 Room 1101, Block A, Zhongrui Building, No. 9 Hongfeng Road, Hefei High-tech Zone, Anhui Province Patentee before: ANHUI VMWAY INFORMATION TECHNOLOGY CO.,LTD. |
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Effective date of registration: 20190418 Address after: 052373 Zhaoma Village East, Nanzhiqiu Town, Xinji City, Shijiazhuang City, Hebei Province Patentee after: XINJI AOSEN IRON & STEEL Co.,Ltd. Address before: 610000 5th Floor, Xiongfei Center, No. 1 Tidu Street, Qingyang District, Chengdu City, Sichuan Province Patentee before: Wang Yajun |
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Address after: 052373 Zhaoma Village East, Nanzhiqiu Town, Xinji City, Shijiazhuang City, Hebei Province Patentee after: Xinji Aosen iron and Steel Group Co.,Ltd. Address before: 052373 Zhaoma Village East, Nanzhiqiu Town, Xinji City, Shijiazhuang City, Hebei Province Patentee before: XINJI AOSEN IRON & STEEL Co.,Ltd. |
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Address after: 052373 Zhaoma Village East, Nanzhiqiu Town, Xinji City, Shijiazhuang City, Hebei Province Patentee after: Xinji Aosen Special Steel Group Co.,Ltd. Address before: 052373 Zhaoma Village East, Nanzhiqiu Town, Xinji City, Shijiazhuang City, Hebei Province Patentee before: Xinji Aosen iron and Steel Group Co.,Ltd. |
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