CN112410516B - Preparation method of high-efficiency blind rivet steel - Google Patents
Preparation method of high-efficiency blind rivet steel Download PDFInfo
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- CN112410516B CN112410516B CN202011244617.XA CN202011244617A CN112410516B CN 112410516 B CN112410516 B CN 112410516B CN 202011244617 A CN202011244617 A CN 202011244617A CN 112410516 B CN112410516 B CN 112410516B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 58
- 239000010959 steel Substances 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 73
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 239000000344 soap Substances 0.000 claims abstract description 22
- 238000010791 quenching Methods 0.000 claims abstract description 21
- 230000000171 quenching effect Effects 0.000 claims abstract description 21
- 230000006835 compression Effects 0.000 claims abstract description 14
- 238000007906 compression Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 230000006032 tissue transformation Effects 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims abstract description 3
- 238000005261 decarburization Methods 0.000 claims description 7
- 230000008676 import Effects 0.000 claims description 7
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 6
- 229910001566 austenite Inorganic materials 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 5
- 238000005482 strain hardening Methods 0.000 claims description 4
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 8
- 230000002950 deficient Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000926 separation method Methods 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/44—Methods of heating in heat-treatment baths
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/60—Aqueous agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
-
- 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 preparation method of high-efficiency blind rivet steel, which relates to the technical field of blind rivet steel preparation and comprises the following steps: preparing raw materials; drawing for the first time; and (3) heat treatment: the method comprises the steps of quenching in water bath, changing the length of a quenching section during quenching, heating in stages during heat treatment, forming good oxide scale on the steel wire in the first two stages, and finishing tissue transformation in the last four stages; secondary middle pulling: the total compression rate of drawing is controlled within 70%, and the compression rate of the last pass is controlled within 10%; and (3) powder removal: the drawn steel wire is subjected to cleaning of residual soap powder through a powder removing box; and (5) separating rolls. The invention has the advantages that: the water bath quenching is adopted during the heat treatment, so that the steel wire is more environment-friendly, the staged heating is adopted during the heat treatment, the length of the quenching section is changed, and the performance of the steel wire is better controlled; the surface quality of the finished product is ensured to be qualified, and the problem of diameter out-of-tolerance is effectively reduced; the content of residual soap powder on the surface of the steel wire is effectively improved, and the preparation efficiency is high.
Description
Technical Field
The invention relates to the technical field of blind rivet steel preparation, in particular to a preparation method of high-efficiency blind rivet steel.
Background
The blind rivet steel is used as a rivet raw material, has wide application, but the production process is generally rough, and has long steps and low efficiency. With the development of steel wire production processes in recent years, downstream processes are gradually aware of the importance of controlling the strength, diameter and surface residual soap powder of the blind rivet steel, and then the requirements on the strength, diameter and surface residual soap powder of the blind rivet steel are gradually increased, while the traditional process can not basically meet the increasing requirements.
The patent with the application number of 201510897889.2 discloses an ultra-high strength steel wire rope and a wire drawing method thereof, wherein the manufactured steel wire has certain strength, but heavy metal ions are discharged through patenting, so that the ultra-high strength steel wire rope is not environment-friendly, and the performance of the steel wire is difficult to control; the patent with application number 201910412206.8 discloses a preparation method of a wear-resistant and tensile steel wire rope, and the manufactured steel wire has high tensile strength, high flexibility and wear resistance, but has low efficiency, the performance of the steel wire is difficult to control, and in addition, the surface of the steel wire processed by the two patents has more residual soap powder and high diameter out-of-tolerance defective rate. The preparation method of the high-efficiency blind rivet steel is needed to be provided, so that the performance of the steel wire is effectively controlled, the diameter out-of-tolerance defective rate is reduced, the surface residual soap powder is reduced, and the production efficiency is improved.
Disclosure of Invention
The invention aims to solve the technical problems of difficult control of production performance, high defective rate due to out-of-tolerance diameter, high residual soap powder on the surface and low production efficiency of the high-efficiency blind rivet steel.
In order to solve the technical problems, the technical scheme of the invention is as follows: the method comprises the following steps:
s1, preparing raw materials: selecting a low-carbon steel wire rod;
s2, primary drawing: drawing the low-carbon steel wire rod to a diameter of 3.08-3.42mm through large drawing;
s3, heat treatment: the method comprises the steps of adopting water bath quenching, changing the length of a quenching section during quenching, controlling the length to be 300-600cm, ensuring the strength of the steel wire to reach a required standard interval, improving the work hardening rate, adopting stage heating during heat treatment, forming good oxide skin on the steel wire in the first two stages, finishing tissue transformation in the later four stages, and stopping abnormal decarburization of the steel wire by stage heating;
s4, secondary middle pulling: controlling the total compression rate of drawing within 70%, controlling the compression rate of the final pass within 10%, and drawing to a diameter of 1.75-2.85mm;
s5, removing powder: the drawn steel wire is subjected to cleaning of residual soap powder through a powder removing box;
s6, separating rolls: and directly separating the rolls after secondary intermediate drawing and powder removal to obtain a finished product.
Further, in the step S3, during the heat treatment, the temperature of the gas furnace is controlled to 900-1100 ℃, the gas furnace is divided into six areas, the furnace temperature process is 985 ℃, 1005 ℃, 1025 ℃, 1040 ℃, 980 ℃ and the internal structure of the steel wire is changed into austenite from a drawing state in the heating process, and the austenite structure is changed into sorbite after water bath.
Further, in the step S4, during secondary drawing, the inlet angle of the die is controlled to be 9+/-1 degrees, the outlet angle is controlled to be 90+/-5 degrees, the length of the bearing is controlled to be 20-35% D, D is the diameter of an outlet monofilament, and the diameter ovality of a finished steel wire is controlled to be within the range of 0.03 mm.
Further, remove the powder case and be a cuboid structure, remove the powder case level setting, including removing the powder shell, the both ends that remove the powder shell are import and export respectively, import and exit are provided with the felt, remove the inside spring brush that is provided with of powder shell, remove the top evenly spaced apart of powder case and be equipped with the several gas pocket, the several gas pocket passes through the pipeline and is connected with the air outlet of air-blower, the bottom that removes the powder shell is provided with row powder hole, it communicates with soap powder recovery box through row powder passageway to arrange the powder hole, soap powder recovery box sets up in removing powder shell below.
The invention has the advantages that: the water bath quenching is adopted during the heat treatment, so that the method is more environment-friendly, the length of a quenching section is changed during the quenching, the strength of the steel wire reaches a required standard interval, the spacing between the steel wire tissue pieces is better than that of the patenting, and the work hardening rate is improved; the steel wire is heated in stages during heat treatment, a good oxide skin is formed in the first two stages, tissue transformation is completed in the last four stages, gas is saved by sectional heating, the heat value of natural gas is effectively utilized, the decarburization probability of the traditional open flame furnace heating process reaches 5%, the sectional heating stops abnormal decarburization of the steel wire, and the performance of the steel wire is well controlled;
the traditional total compression rate is more than 90%, the die consumption is 1 time higher, the diameter out-of-tolerance defective rate is 10%, the total compression rate is controlled within 70%, the surface quality of a finished product is ensured to be qualified, and the problem of diameter out-of-tolerance is effectively reduced;
the powder is removed after secondary middle pulling, and then the split rolling is directly carried out, so that the preparation efficiency of the blind rivet steel can be effectively improved by 25%, and the residual soap powder content on the surface of the steel wire can be effectively improved.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention;
FIG. 2 is a schematic view of a secondary drawing and separating coil according to the present invention;
fig. 3 is a schematic structural view of the powder removing box of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and detailed description. The following examples will provide those skilled in the art with a more complete understanding of the present invention and are not intended to limit the invention to the embodiments described.
The specific implementation mode adopts the following technical scheme: as shown in fig. 1, the method comprises the following steps:
s1, preparing raw materials: and selecting a low-carbon steel wire rod.
S2, primary drawing: the low carbon steel wire rod is drawn to a diameter of 3.08-3.42mm by large drawing.
S3, heat treatment: the quenching is carried out by adopting water bath quenching and traditional heating patented quenching, I adopt AQ water bath quenching without heavy metal ion emission, the quenching is more environment-friendly, the length of the quenching section is controlled to be 300-600cm, the strength of the steel wire reaches a required standard interval, the spacing between the tissue pieces of the steel wire is better than that of patented quenching, the work hardening rate is improved, the heat treatment adopts staged heating, a gas furnace is divided into six areas, the furnace temperature process is sequentially 985 ℃, 1005 ℃, 1025 ℃, 1040 ℃, 1005 ℃ and 980 ℃, the internal structure of the steel wire is converted from a drawing state into austenite in the heating process, the austenite structure is converted into sorbite after water bath, the steel wire forms good oxide skin in the first two stages, the tissue conversion is completed in the latter four stages, and the steel wire decarburization abnormality is stopped by staged heating; decarburization probability of the traditional open flame furnace heating process reaches 5%; the temperature of the heating furnace is controlled at 900-1100 ℃, which is beneficial to avoiding decarburization and steel wire tissue piece spacing, is beneficial to improving the compression rate of the subsequent drawing, saves fuel gas and effectively utilizes the heat value of natural gas.
S4, secondary middle pulling: the total compression rate of drawing is controlled within 70%, the traditional super-large compression rate drawing concept is distinguished, the compression rate of each pass is reduced under the condition of guaranteeing the strength performance of a finished product, the surface quality of the finished product is guaranteed to be qualified, the compression rate of the last pass is controlled within 10%, the diameter is controlled to be 1.75-2.85mm, the problem of diameter super-poor is effectively reduced, the traditional total compression rate is more than 90%, the die consumption is 1 time higher, and the diameter super-poor defective rate is 10%;
when drawing, the inlet angle of the die is controlled to be 9+/-1 DEG, the outlet angle is controlled to be 90+/-5 DEG, the length of the bearing is controlled to be 20-35% D, D is the diameter of an outlet monofilament, the ovality of the diameter of a finished steel wire is controlled to be within the range of 0.03mm, and the diameter of the die is controlled to be: the finished die is +3 to +8um, the unfinished die is-5 to +3um, a certain tension is formed by winding the die with a winding drum after the die is pulled out, and a secondary pulling and winding separation schematic diagram is shown in figure 2.
S5, removing powder: the steel wire after drawing carries out the clearance of residual soap powder through removing the powder case, as shown in fig. 3, remove the powder case and be a cuboid structure, remove the powder case level setting, including removing powder shell 1, remove the both ends of powder shell 1 and be import and export respectively, import and exit are provided with felt 2, remove the inside spring brush 3 that is provided with of powder shell 1, the top of removing the powder case evenly spaced apart is equipped with the several gas blow hole, the several gas blow hole passes through pipeline 4 and is connected with the air outlet of air-blower 5, the bottom of removing the powder shell 1 is provided with row powder hole, row powder hole passes through row powder passageway 6 and is retrieved case 7 intercommunication with soap powder, soap powder is retrieved case 7 and is set up in the below of removing powder shell 1 and felt 2.
When the steel wire removes the powder through the powder removal case, the steel wire passes through the felt 2 of the import department of the powder removal shell 1 at first, then pass from the centre of the inside spring brush 3 of powder removal shell 1 again, pass through from the felt 2 of the export department of the powder removal shell 1 at last, the steel wire passes through felt 2, spring brush 3 and realizes the soap powder clearance many times, the soap powder after the clearance is blown down in the soap powder recovery case 7 through the effect of air-blower 5 and is collected, the powder removal case convenient operation, and effectively improve the residual soap powder content on steel wire surface.
S6, separating rolls: and after secondary intermediate drawing and powder removal, the finished product is directly subjected to coil separation through a coil separation machine, the intermediate drawing and coil separation are integrated, the conventional coil separation step after drawing to the specification of the finished product is distinguished, the coil separation is performed synchronously, and the finished product manufacturing is efficiently completed.
The blind rivet steel prepared by the concrete embodiment can effectively improve the preparation efficiency by 25 percent, the shrinkage defective rate is reduced from 10 percent to 0, the strength dispersion defective rate is reduced from 20 percent to within 5 percent, and the soap powder content is reduced from 4g/m 2 Reduced to 1g/m 2 The manufacturing is efficient and convenient, and the performance control is good.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. A preparation method of high-efficiency blind rivet steel is characterized by comprising the following steps: the method comprises the following steps:
s1, preparing raw materials: selecting a low-carbon steel wire rod;
s2, primary drawing: drawing the low-carbon steel wire rod to a diameter of 3.08-3.42mm through large drawing;
s3, heat treatment: the method comprises the steps of adopting water bath quenching, changing the length of a quenching section during quenching, controlling the length to be 300-600cm, ensuring the strength of the steel wire to reach a required standard interval, improving the work hardening rate, adopting stage heating during heat treatment, forming good oxide skin on the steel wire in the first two stages, finishing tissue transformation in the later four stages, and stopping abnormal decarburization of the steel wire by stage heating;
s4, secondary middle pulling: controlling the total compression rate of drawing within 70%, controlling the compression rate of the final pass within 10%, and drawing to a diameter of 1.75-2.85mm;
s5, removing powder: the drawn steel wire is subjected to cleaning of residual soap powder through a powder removing box;
s6, separating rolls: directly separating the rolls after secondary intermediate drawing and powder removal to obtain a finished product;
in the step S3, during heat treatment, the temperature of the gas furnace is controlled at 900-1100 ℃, the gas furnace is divided into six areas, the furnace temperature process is sequentially 985 ℃, 1005 ℃, 1025 ℃, 1040 ℃, 1005 ℃ and 980 ℃, the internal structure of the steel wire is changed into austenite from a drawing state in the heating process, and the austenite structure is changed into sorbite after water bath;
the utility model provides a powder removing box, including removing the powder shell, remove the both ends of powder shell respectively for import and export, import and exit are provided with the felt, remove the inside spring brush that is provided with of powder shell, remove the top evenly spaced apart of powder box and be equipped with the several gas blow hole, the several gas blow hole passes through the pipeline and is connected with the air outlet of air-blower, the bottom of removing the powder shell is provided with row powder hole, it communicates with soap powder recovery case to arrange the powder hole through row powder passageway, soap powder recovery case sets up in removing powder shell below.
2. The method for preparing the high-efficiency blind rivet steel according to claim 1, which is characterized in that: in the step S4, during secondary drawing, the inlet angle of the die is controlled to be 9+/-1 degrees, the outlet angle is controlled to be 90+/-5 degrees, the length of the bearing is controlled to be 20-35% D, D is the diameter of an outlet monofilament, and the diameter ovality of a finished steel wire is controlled to be within the range of 0.03 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011244617.XA CN112410516B (en) | 2020-11-10 | 2020-11-10 | Preparation method of high-efficiency blind rivet steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011244617.XA CN112410516B (en) | 2020-11-10 | 2020-11-10 | Preparation method of high-efficiency blind rivet steel |
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| Publication Number | Publication Date |
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| CN112410516A CN112410516A (en) | 2021-02-26 |
| CN112410516B true CN112410516B (en) | 2023-12-15 |
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| CN113249551A (en) * | 2021-04-09 | 2021-08-13 | 张家港市苏闽金属制品有限公司 | Heat treatment method for improving bending fatigue strength of thick wet-drawn steel wire |
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| CN105568155A (en) * | 2015-12-29 | 2016-05-11 | 东莞市科力钢铁线材有限公司 | Production process of super-plasticity low-carbon steel material used for turning rivet |
| CN208084825U (en) * | 2018-04-13 | 2018-11-13 | 广州创特技术有限公司 | A kind of bugduster apparatus |
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| CN110842039A (en) * | 2018-08-20 | 2020-02-28 | 奥钢联伯乐焊接(中国)有限公司 | One-millimeter stainless steel gas shielded welding wire linear drawing production method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE8004968L (en) * | 1979-07-21 | 1981-01-22 | Lucas Industries Ltd | DEVICE FOR PACKAGING OF DUST ON FORMAL |
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2020
- 2020-11-10 CN CN202011244617.XA patent/CN112410516B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352381A (en) * | 2013-07-25 | 2013-10-16 | 张家港市胜达钢绳有限公司 | Production method of high-strength steel rope |
| CN105478502A (en) * | 2015-12-29 | 2016-04-13 | 东莞市科力钢铁线材有限公司 | Production process of non-annealed wire material for pulling rivet pull rod |
| CN105568155A (en) * | 2015-12-29 | 2016-05-11 | 东莞市科力钢铁线材有限公司 | Production process of super-plasticity low-carbon steel material used for turning rivet |
| CN208084825U (en) * | 2018-04-13 | 2018-11-13 | 广州创特技术有限公司 | A kind of bugduster apparatus |
| CN110842039A (en) * | 2018-08-20 | 2020-02-28 | 奥钢联伯乐焊接(中国)有限公司 | One-millimeter stainless steel gas shielded welding wire linear drawing production method |
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| CN112410516A (en) | 2021-02-26 |
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