CN110976726B - Surface coating agent for hot heading of titanium alloy wire and coating method thereof - Google Patents
Surface coating agent for hot heading of titanium alloy wire and coating method thereof Download PDFInfo
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- CN110976726B CN110976726B CN201911369775.5A CN201911369775A CN110976726B CN 110976726 B CN110976726 B CN 110976726B CN 201911369775 A CN201911369775 A CN 201911369775A CN 110976726 B CN110976726 B CN 110976726B
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- titanium alloy
- alloy wire
- molybdenum disulfide
- graphite
- coating composition
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 51
- 238000000576 coating method Methods 0.000 title claims description 36
- 239000011248 coating agent Substances 0.000 title claims description 35
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 18
- 239000010439 graphite Substances 0.000 claims abstract description 18
- 239000008199 coating composition Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000005498 polishing Methods 0.000 claims abstract description 16
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 13
- 235000015278 beef Nutrition 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 239000003760 tallow Substances 0.000 claims abstract description 12
- 238000000227 grinding Methods 0.000 claims abstract description 10
- 238000010622 cold drawing Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000008213 purified water Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 9
- 238000012545 processing Methods 0.000 abstract description 8
- 239000000853 adhesive Substances 0.000 abstract description 6
- 230000001070 adhesive effect Effects 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 230000001050 lubricating effect Effects 0.000 description 11
- 239000007787 solid Substances 0.000 description 5
- 239000000725 suspension Substances 0.000 description 4
- 238000012795 verification Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J3/00—Lubricating during forging or pressing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
Abstract
The invention belongs to the field of titanium alloy processing, and provides a surface coating composition for hot heading of a titanium alloy wire, which comprises graphite, molybdenum disulfide, water glass and beef tallow in a mass ratio of 30-50:20-40:10-20: 5-10. The coating composition is obtained by taking graphite, molybdenum disulfide, water glass and beef tallow as raw materials according to the characteristics of titanium alloy, the requirements of a rapid film forming process and the manufacturing requirements of hot upsetting, is obtained by optimizing the proportion, is coated on the surface of a titanium alloy wire through the steps of stirring, grinding, dispersing, peeling and polishing the surface of the titanium alloy wire, heating, spraying, drying, cold drawing and the like, has strong adhesive force, can effectively reduce the friction force between the titanium alloy wire and a die when a fastener is upset, ensures uniform metal deformation, avoids upsetting cracks, prolongs the service life of the die, improves the production efficiency, has better high temperature resistance, and can meet the requirements of continuous upsetting processing of the titanium alloy fastener in the field of military industry.
Description
Technical Field
The invention belongs to the field of titanium alloy processing, and particularly relates to a surface coating agent for hot heading of a titanium alloy wire and a coating method thereof.
Background
With the rapid development of aerospace industry in China and the continuous improvement of the performance requirements of advanced aircrafts, the demand of new generation titanium alloy fasteners for aerospace is continuously increased, and the requirements of the fasteners on the comprehensive performance are higher and higher. In order to improve the production efficiency and the quality stability of the fasteners in China, a plurality of fastener production units in China import a plurality of continuous fastener upsetting devices from abroad. The equipment can exert the advantages only by using large single-weight disc round wire materials as raw materials for upsetting fasteners, and the aim of efficient and stable production is fulfilled.
Due to the adoption of the upsetting processing mode during the production of the fastener, the material is easy to crack, and the die can be scrapped in severe cases. In order to ensure the lubricating effect in the upsetting process, improve the metal flowing state on the surface of a material during upsetting and reduce the upsetting cracking phenomenon, a self-lubricating coating must be coated on the surface of a titanium alloy wire, so that the upsetting cracking problem in the processing process of the wire rod is solved, and the yield of fastener production is improved.
The coating material on the surface of the round wire needs to have a film thickness of 3-10 mu m and bear the high temperature of 500-700 ℃ in the extrusion and upsetting processes with high load, so that the lubricating capability of the round wire is greatly required, and the binding force between the coating and the round wire, the high load bearing capability of the round wire and the construction process performance directly influence the realization of the lubricating function. Therefore, the technical key of the design of a high-bearing solid lubricating system and a film forming technology is solved, the optimized lubricating coating system has the technological characteristics of quick uniform thickness film forming in the wire manufacturing process, can be stably bonded on the surface of the wire and provide a high-bearing lubricating function, meets the unique manufacturing and processing technological requirements of the titanium alloy wire rod for the fastener, and is the key of the research of the coating method.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a surface coating agent for hot heading of titanium alloy wires and a coating method thereof so as to meet the unique manufacturing and processing technological requirements of titanium alloy wire rods for fasteners.
The first aspect of the present invention is to provide a surface coating composition for hot heading of a titanium alloy wire (referred to simply as a surface coating composition). The coating composition is prepared by taking graphite, molybdenum disulfide, water glass and beef tallow as raw materials according to the characteristics of titanium alloy, the requirement of a rapid film forming process and the manufacturing requirement of hot heading according to a certain proportion.
The surface coating composition comprises graphite, molybdenum disulfide, water glass and beef tallow, wherein the mass ratio of the graphite to the molybdenum disulfide to the water glass to the beef tallow is (30-50) to (20-40) to (10-20) to (5-10).
Preferably, the graphite in the components of the surface coating composition adopts high-purity graphite of LC (-)150-99.9 type, and the particle size is 1-5 μm. The graphite has high purity, good abrasion resistance and good high-temperature adhesion performance, and meets the requirements of the surface lubricating material in the invention.
Preferably, the molybdenum disulfide in the components of the surface coating composition adopts type I high-purity molybdenum disulfide, the purity is more than 99.5 percent, and the granularity is 2500 meshes. The requirements of the surface lubricating material in the invention are met.
The invention adopts high-quality sodium silicate as the adhesive, has the characteristics of strong adhesive force, higher strength, good heat resistance, poor water resistance and the like, and meets the requirements of the surface lubricating material.
A second aspect of the present invention provides a method for coating a surface coating composition for hot heading of a titanium alloy wire according to the first aspect of the present invention, comprising the steps of:
s1 stirring: adding graphite powder and molybdenum disulfide powder into a stirring kettle according to the proportion, adding a proper amount of purified water, and stirring;
s2 grinding; adding the mixture obtained in the step S1 into a vibrating ball mill for grinding;
s3 dispersing: adding water glass and beef tallow into the mixture obtained in the step S2, and dispersing in a high-speed disperser to obtain a liquid coating material;
s4 peeling: cleaning an oxide layer on the surface of the titanium alloy wire by using a skinning machine;
s5 polishing: polishing the surface of the titanium alloy wire obtained in the step S4 by using a polishing machine;
s6 heat treatment: heating the titanium alloy wire obtained in the step S5;
s7 spraying: spraying the liquid coating material obtained in the step S3 on the surface of the titanium alloy wire obtained in the step S6;
s8, drying: drying the titanium alloy wire obtained in the step S7;
s9 cold drawing: the titanium alloy wire obtained in step S8 is subjected to cold drawing to obtain a titanium alloy wire coated with the surface coating composition according to the first aspect of the present invention.
In the present invention, the amount of the purified water used in step S1 is not particularly limited, and those skilled in the art may add a proper amount of purified water according to experience and practical circumstances. In a preferred embodiment of the present invention, the amount of purified water is 1-2 times the total amount of graphite and molybdenum disulfide.
Preferably, in step S1, the stirring time is 1-2 hours.
Preferably, in step S2, the grinding time is 3 to 6 hours.
Preferably, in step S3, the dispersion time is 6 to 8 hours.
Preferably, in step S4, the peeling depth is 0.20-0.50 mm.
Preferably, in step S5, the number of abrasive belts used for polishing the titanium alloy wire is 120-360 meshes.
Preferably, in the step S6, the heating temperature of the titanium alloy wire is 200-400 ℃, and the heat preservation time is 10-15 minutes;
preferably, in step S7, the surface coating agent is sprayed to a thickness of 0.01-0.02 mm.
Preferably, in step S8, the drying temperature is 100-200 ℃ and the drying time is 10-30 minutes.
Preferably, in step S9, the cold drawing deformation amount is 0.20-0.50 mm.
It will be appreciated that the top coat composition of the first aspect of the invention may also be pre-produced as a directly sprayable liquid coating material using steps S1-S3 prior to use. Therefore, in a third aspect of the present invention, there is provided a surface coating agent for hot heading of a titanium alloy wire (hereinafter referred to as "surface coating agent"), which is prepared from a solid component and an appropriate amount of water, wherein the solid component is the surface coating agent for hot heading of a titanium alloy wire according to the first aspect of the present invention.
The amount of the purified water in the surface coating agent is not particularly limited, and those skilled in the art can add a proper amount of purified water according to experience and actual conditions. In a preferred embodiment of the present invention, the surface coating agent contains purified water in an amount of 1 to 2 times the total amount of graphite and molybdenum disulfide.
The fourth aspect of the present invention provides a method for preparing a coating agent for hot heading of a titanium alloy wire according to the third aspect of the present invention, comprising the steps S1 to S3 of the coating method according to the second aspect of the present invention.
Accordingly, when the surface coating agent according to the third aspect of the present invention is applied, the steps S1-S3 are omitted based on the coating method according to the third aspect of the present invention. Therefore, a fifth aspect of the present invention is to provide a coating method of a surface coating agent for hot heading of a titanium alloy wire according to the third aspect of the present invention, which comprises steps S4 to S9 of the coating method according to the second aspect of the present invention.
Compared with the prior art, the invention has the beneficial effects that:
the coating composition is obtained by taking graphite, molybdenum disulfide, water glass and beef tallow as raw materials according to the characteristics of titanium alloy, the requirements of a rapid film forming process and the manufacturing requirements of hot upsetting, is obtained by optimizing the proportion, is coated on the surface of a titanium alloy wire through the steps of stirring, grinding, dispersing, peeling and polishing the surface of the titanium alloy wire, heating, spraying, drying, cold drawing and the like, has strong adhesive force, can effectively reduce the friction force between the titanium alloy wire and a die when a fastener is upset, ensures uniform metal deformation, avoids upsetting cracks, prolongs the service life of the die, improves the production efficiency, has better high temperature resistance, and can meet the requirements of continuous upsetting processing of the titanium alloy fastener in the field of military industry.
Detailed Description
The invention will be better understood by reference to the following examples. In the following embodiments, the graphite used implements the GB/T3518-; the used molybdenum disulfide meets the requirements of HG/T3929-2007 standard, the purity is more than 99.5 percent, the granularity is 2500 meshes, and the technical indexes of the product meet the relevant requirements of I type high-purity molybdenum disulfide; the used water glass meets the requirements of GB/T4209-.
Example 1
500g of LC (-)150-99.9 type high-purity graphite and 300g of I type high-purity molybdenum disulfide are respectively weighed and added into a stirring kettle, 1300g of purified water is added into the stirring kettle, and the raw materials are stirred for 1 hour to be fully mixed. And adding the uniformly stirred mixed solution into a vibrating ball mill for grinding for 4 hours to obtain a suspension with the solid particle size of about 1 mu m. Then, 100g of water glass and 50g of beef tallow were added to the suspension, and dispersion was carried out in a high-speed disperser for 6 to 8 hours to obtain a liquid coating material.
Taking a plate of TC4 wire, wherein the diameter of the wire is phi 6.8mm, and peeling the wire to phi 6.5mm by using a die; polishing by using a 240-mesh polishing machine; after polishing, putting the wires into a box-type heating furnace, heating to 280 ℃ and preserving heat for 10 minutes, then discharging, uniformly spraying to obtain a liquid coating material, wherein the spraying thickness is about 0.01mm, hanging and drying in the box-type furnace after spraying, and the baking temperature is 120 ℃ and the preserving heat time is 20 minutes; and after baking, drawing on a cold wire drawing machine, wherein the drawing deformation is 0.20mm, the specification of a drawn finished product is phi 6.3mm, and the thickness of the surface coating of the drawn wire is measured to be 5-8 mu m.
The prepared TC4 wire with the surface coating is subjected to heading verification by a fastener continuous hot heading machine, medium-frequency heating is adopted before heading, the heating temperature is 680 ℃, the surface coating has good adhesive force in the heading process, can bear the high temperature of 680 ℃, and can play a role in lubricating in a die. 200 workpieces are upset in the batch, the number of unqualified products is 3, the qualification rate is 98.5%, the problems of die sticking, splitting and the like do not occur, and the verification result is qualified.
Example 2
500g of LC (-)150-99.9 type high-purity graphite and 300g of I type high-purity molybdenum disulfide are respectively weighed and added into a stirring kettle, 1300g of purified water is added into the stirring kettle, and the raw materials are stirred for 1 hour to be fully mixed. And adding the uniformly stirred mixed solution into a vibrating ball mill for grinding for 4 hours to obtain a suspension with the solid particle size of about 1 mu m. Then, 100g of water glass and 50g of beef tallow were added to the suspension, and dispersion was carried out in a high-speed disperser for 6 to 8 hours to obtain a liquid coating material.
Taking another TC4 disc of round wire with the diameter phi of 5.8mm, and peeling to phi 5.5mm by adopting a die; polishing by using a 240-mesh polishing machine; after polishing, putting the wires into a box-type heating furnace, heating to 280 ℃ and preserving heat for 10 minutes, then discharging, uniformly spraying to obtain a liquid coating material, wherein the spraying thickness is about 0.02mm, hanging and drying in the box-type furnace after spraying, and the baking temperature is 120 ℃ and the preserving heat time is 15 minutes; and after baking, drawing on a cold wire drawing machine, wherein the drawing deformation is 0.20mm, the specification of a drawn finished product is phi 5.3mm, and the thickness of the surface coating of the drawn wire is measured to be 8-10 mu m.
The prepared TC4 wire with the surface coating is subjected to heading verification by a fastener continuous hot heading machine, medium-frequency heating is adopted before heading, the heating temperature is 680 ℃, the surface coating has good adhesive force in the heading process, can bear the high temperature of 680 ℃, and can play a role in lubricating in a die. 200 workpieces are upset in the batch, the number of unqualified products is 4, the qualification rate is 98%, the problems of die sticking, splitting and the like do not occur, and the verification result is qualified.
The embodiments of the present invention have been described in detail, but the embodiments are merely examples, and the present invention is not limited to the embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.
Claims (6)
1. A coating method of a surface coating composition for hot heading of a titanium alloy wire is characterized by comprising the following steps:
s1 stirring: adding graphite powder and molybdenum disulfide powder into a stirring kettle according to the proportion, adding a proper amount of purified water, and stirring;
s2 grinding; adding the mixture obtained in the step S1 into a vibrating ball mill for grinding;
s3 dispersing: adding water glass and beef tallow into the mixture obtained in the step S2, and dispersing in a high-speed disperser to obtain a liquid coating material;
s4 peeling: cleaning an oxide layer on the surface of the titanium alloy wire by using a skinning machine;
s5 polishing: polishing the surface of the titanium alloy wire obtained in the step S4 by using a polishing machine;
s6 heat treatment: heating the titanium alloy wire obtained in the step S5;
s7 spraying: spraying the liquid coating material obtained in the step S3 on the surface of the titanium alloy wire obtained in the step S6;
s8, drying: drying the titanium alloy wire obtained in the step S7;
s9 cold drawing: performing cold drawing on the titanium alloy wire obtained in the step S8 to finally obtain a titanium alloy wire coated with the surface coating composition for hot heading of the titanium alloy wire; the surface coating composition for hot heading of the titanium alloy wire comprises graphite, molybdenum disulfide, water glass and beef tallow, wherein the mass ratio of the graphite to the molybdenum disulfide to the water glass to the beef tallow is (30-50) - (20-40) - (10-20) - (5-10).
2. The method for coating the surface coating composition for hot heading of titanium alloy wires according to claim 1, wherein the composition of the surface coating composition for hot heading of titanium alloy wires comprises high purity graphite of type LC (-)150-99.9, and the particle size is 1-5 μm; the molybdenum disulfide adopts I type high-purity molybdenum disulfide, the purity is more than 99.5 percent, and the granularity is 2500 meshes.
3. The coating method according to claim 1, wherein the liquid coating material is sprayed to a thickness of 0.01 to 0.02mm in step S7.
4. The coating method according to claim 1, wherein the amount of the purified water used in step S1 is 1-2 times the total amount of the graphite and the molybdenum disulfide.
5. The coating method according to claim 1, wherein in step S1, the stirring time is 1 to 2 hours; in step S2, the grinding time is 3-6 hours; in step S3, the dispersion time is 6 to 8 hours.
6. The coating method according to claim 1, wherein in step S4, the skinning depth is 0.20-0.50 mm; in step S5, the number of abrasive belts used for polishing the titanium alloy wire is 120-360 meshes; in the step S6, the heating temperature of the titanium alloy wire is 200-; in step S8, the drying temperature is 100-200 ℃, and the drying time is 10-30 minutes; in step S9, the cold drawing deformation amount is 0.20-0.50 mm.
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| CN201911369775.5A CN110976726B (en) | 2019-12-26 | 2019-12-26 | Surface coating agent for hot heading of titanium alloy wire and coating method thereof |
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| CN201911369775.5A CN110976726B (en) | 2019-12-26 | 2019-12-26 | Surface coating agent for hot heading of titanium alloy wire and coating method thereof |
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| CN113245169A (en) * | 2021-04-20 | 2021-08-13 | 西北工业大学 | Method for spraying lubricating coating on titanium alloy fastener or connecting piece |
| CN113351677B (en) * | 2021-05-17 | 2023-02-28 | 西部超导材料科技股份有限公司 | Preparation method of TC10 titanium alloy wire rod |
| CN116814155A (en) * | 2023-08-02 | 2023-09-29 | 沈阳市航达科技有限责任公司 | High-performance alloy wire hot pier processing lubricating coating and preparation method thereof |
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| CN108187990A (en) * | 2018-01-15 | 2018-06-22 | 南京理工大学 | The preparation method of titanium or titanium alloy surface self-lubricating wear-resistant coating containing graphene/molybdenum disulfide |
-
2019
- 2019-12-26 CN CN201911369775.5A patent/CN110976726B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58198596A (en) * | 1982-05-17 | 1983-11-18 | Sumitomo Metal Ind Ltd | Hot extrusion process for zr and its alloy |
| JPH10158668A (en) * | 1996-11-29 | 1998-06-16 | Fuji Dies Kk | Solid lubricant coating liquid and production of product coated therewith |
| CN102433209A (en) * | 2011-10-28 | 2012-05-02 | 郑小玲 | High-toughness anti-extreme pressure lubricating grease |
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Denomination of invention: The invention relates to a surface coating agent for hot upsetting of titanium alloy wire and a coating method thereof Effective date of registration: 20220329 Granted publication date: 20210810 Pledgee: Baoji Weibin rural commercial bank Limited by Share Ltd. Pledgor: Baoji Xinnuo New Metal Material Co.,Ltd. Registration number: Y2022980003577 |
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Denomination of invention: A kind of surface coating agent for hot upsetting of titanium alloy wire and coating method thereof Effective date of registration: 20220809 Granted publication date: 20210810 Pledgee: Bank of Xi'an Co., Ltd. Baoji Branch Pledgor: Baoji Xinnuo New Metal Material Co.,Ltd. Registration number: Y2022610000469 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230817 Granted publication date: 20210810 Pledgee: Bank of Xi'an Co.,Ltd. Baoji Branch Pledgor: Baoji Xinnuo New Metal Material Co.,Ltd. Registration number: Y2022610000469 |