CN114369759A - Low temperature resistant anchor chain - Google Patents
Low temperature resistant anchor chain Download PDFInfo
- Publication number
- CN114369759A CN114369759A CN202111560363.7A CN202111560363A CN114369759A CN 114369759 A CN114369759 A CN 114369759A CN 202111560363 A CN202111560363 A CN 202111560363A CN 114369759 A CN114369759 A CN 114369759A
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- Prior art keywords
- equal
- temperature
- anchor chain
- minus
- low
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- 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.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/20—Adaptations of chains, ropes, hawsers, or the like, or of parts thereof
-
- 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
-
- 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
- C21D11/00—Process control or regulation for heat treatments
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D9/0087—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for chains, for chain links
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/20—Adaptations of chains, ropes, hawsers, or the like, or of parts thereof
- B63B2021/203—Mooring cables or ropes, hawsers, or the like; Adaptations thereof
Abstract
The invention discloses a low-temperature-resistant anchor chain which is characterized by mainly comprising the following components in percentage by mass: c: 0.25-0.45%, Si is less than or equal to 0.5%, Mn: 0.5-1.2%, P is less than or equal to 0.015%, S is less than or equal to 0.008%, Cr: 0.5-1.2%, Ni: 0.5-1.2%, Mo: 0.3-0.6%, Al: 0.02-0.05%; the loop weaving temperature of the anchor chain in the production process does not exceed 920 ℃, and the temperature of the chain loop does not exceed 950 ℃ during heat treatment; the anchor chain has the advantages that the anchor chain can better respond to a low-temperature environment, and the influence of coarsening of crystal grains on low-temperature toughness can be effectively prevented, so that various mechanical properties of the chain ring at a low temperature are ensured.
Description
Technical Field
The invention relates to the technical field of anchor chains, in particular to a low-temperature-resistant anchor chain.
Background
Since the oil and gas resources in the arctic are mainly concentrated on the seabed and drilling and production are required through offshore platforms, the low temperature resistance of anchor and mooring chains is required. The anchor chain (including marine anchor chain and mooring chain) is the important equipment for anchoring and braking the ship, and is also the main component of the system for mooring and positioning the offshore structure. Anchor chains are required, whether they are polar vessels, scientific vessels, or floating drilling platforms, production platforms, or even polar marine ranches. Generally, the toughness of steel materials decreases with decreasing temperature, and anchor chain steels are no exception. The test temperature of the mechanical property of the anchor chain (mainly referring to V-shaped notch impact test) is 0 ℃, and the test temperature of the mooring chain is only-20 ℃. In fact, under polar conditions, the service temperature is often up to-30 ℃ or even lower, which requires designers to select anchor chains with different grades according to actual conditions so as to ensure the safe use of the anchoring system under cold conditions. Therefore, a low temperature resistant anchor chain needs to be designed.
Disclosure of Invention
The invention aims to solve the problem that the test temperature of the existing anchor chain can only reach-20 ℃ and can not meet the requirement of use at-30 ℃ or even lower temperature, and provides a low-temperature-resistant anchor chain.
In order to achieve the purpose, the invention adopts the following technical scheme: a low temperature resistant anchor chain which characterized in that: the paint mainly comprises the following components in percentage by mass: c: 0.25-0.45%, Si is less than or equal to 0.5%, Mn: 0.5-1.2%, P is less than or equal to 0.015%, S is less than or equal to 0.008%, Cr: 0.5-1.2%, Ni: 0.5-1.2%, Mo: 0.3-0.6%, Al: 0.02-0.05%.
Preferably: the mass percent of the C content is 0.20-0.35%, and the mass percent of the Ni content is 0.6-2.0%.
Preferably: the low-temperature-resistant anchor chain material has the yield strength of more than or equal to 450MPa, the tensile strength of more than or equal to 700MPa, the elongation of more than or equal to 12 percent and the shrinkage of more than or equal to 50 percent at the temperature of minus 20 ℃.
Preferably: the impact energy of the ring back Charpy notch of the anchor chain at the temperature of minus 20 ℃ is more than or equal to 60J, and the impact energy of the welding seam Charpy notch of the anchor chain at the temperature of minus 20 ℃ is more than or equal to 40J.
Preferably: the impact energy of the ring back Charpy notch is more than or equal to 50J at the temperature of minus 40 ℃, and the impact energy of the welding seam Charpy notch of the anchor chain is more than or equal to 30J at the temperature of minus 40 ℃.
Preferably: the breaking stress is more than or equal to 450MPa at the temperature of minus 20 ℃.
Preferably: the loop temperature of the anchor chain in the production process is not more than 920 ℃, and the loop temperature in the heat treatment process is not more than 980 ℃.
Preferably: the tempering temperature of the anchor chain is not lower than 630 ℃ in the production process.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, Mn, Ni and other elements for improving low-temperature toughness are added in the material for manufacturing the anchor chain, the content of Mn element is set to be 0.5-1.2%, and the content of Ni element is set to be 0.5-1.2%, so that the low-temperature performance of the anchor chain is effectively improved, and the anchor chain can better adapt to a low-temperature environment. The temperature of the chain ring of the anchor chain in the production process is controlled to be not more than 920 ℃, and the temperature of the chain ring is controlled to be not more than 980 ℃ during heat treatment; water cooling is adopted during heat treatment and tempering of the chain, and the tempering temperature is set to be 630-690 ℃; effectively prevents the coarsening of crystal grains from influencing the low-temperature toughness, thereby ensuring various mechanical properties of the chain ring at low temperature.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example one
A low-temperature-resistant anchor chain mainly comprises the following components in percentage by mass: c: 0.25-0.45%, Si is less than or equal to 0.5%, Mn: 0.5-1.2%, P is less than or equal to 0.015%, S is less than or equal to 0.008%, Cr: 0.5-1.2%, Ni: 0.5-1.2%, Mo: 0.3-0.6%, Al: 0.02-0.05%. The yield strength of the anchor chain material at the temperature of minus 20 ℃ is more than or equal to 450MPa, the tensile strength is more than or equal to 700MPa, the elongation is more than or equal to 12 percent, and the shrinkage is more than or equal to 50 percent.
The loop weaving temperature of the anchor chain in the production process does not exceed 920 ℃, and the loop temperature does not exceed 980 ℃ during heat treatment; water cooling is adopted during the heat treatment tempering of the chain, and the tempering temperature is set to be 630-690 ℃.
The anchor chain samples after the tensile test and carries out V type breach impact test to verify its low temperature performance, the verification result is: the impact energy of the ring back Charpy notch is more than or equal to 60J at the temperature of minus 20 ℃, and the impact energy of the welding seam Charpy notch is more than or equal to 40J at the temperature of minus 20 ℃; the impact energy of the ring back Charpy notch is more than or equal to 50J at minus 40 ℃, and the impact energy of the welding seam Charpy notch is more than or equal to 30J at minus 40 ℃. The breaking stress of the anchor chain is more than or equal to 450MPa at the temperature of minus 20 ℃.
Example two
A low temperature resistant anchor chain which characterized in that: the paint mainly comprises the following components in percentage by mass: c: 0.20-0.35%, Si is less than or equal to 0.5%, Mn: 0.5-1.2%, P is less than or equal to 0.015%, S is less than or equal to 0.008%, Cr: 0.5-1.2%, Ni: 0.6-2.0%, Mo: 0.3-0.6%, Al: 0.02-0.05%. The yield strength of the anchor chain material at the temperature of minus 20 ℃ is more than or equal to 450MPa, the tensile strength is more than or equal to 700MPa, the elongation is more than or equal to 12 percent, and the shrinkage is more than or equal to 50 percent.
The loop temperature of the anchor chain is set to 920 ℃, the temperature of the chain loop is set to 950 ℃ during heat treatment quenching, and the tempering temperature is 650 ℃.
The anchor chain samples after the tensile test and carries out V type breach impact test to verify its low temperature performance, the verification result is: the impact energy of the ring back Charpy notch is more than or equal to 60J at the temperature of minus 20 ℃, and the impact energy of the welding seam Charpy notch is more than or equal to 40J at the temperature of minus 20 ℃; the impact energy of the ring back Charpy notch is more than or equal to 50J at minus 40 ℃, and the impact energy of the welding seam Charpy notch is more than or equal to 30J at minus 40 ℃. The breaking stress of the anchor chain is more than or equal to 450MPa at the temperature of minus 20 ℃.
The selection principle of the components and contents of the anchor chain is as follows: c contributes to improving hardenability, thereby increasing the strength of the chain; and simultaneously, the wear resistance can be properly improved. If the content is too high, the weldability and toughness are deteriorated, and the toughness is further deteriorated at low temperature. Therefore, the content of C is controlled to be 0.25-0.35%.
Si can properly improve the strength of steel, but is unfavorable for chain ring flash welding, forms oxides and reduces the performance of a welding seam. Therefore, Si is controlled to be less than or equal to 0.5 percent in the invention.
Mn can improve the hardenability of steel, thereby increasing the strength of the chain; meanwhile, Mn can enlarge an austenite region and reduce the ductile-brittle transition temperature; however, Mn is also an element that is prone to segregation, which may lead to non-uniform link properties. Therefore, the Mn content is controlled to be 0.5 to 1.2% in the present invention.
P is segregated in the grain boundary, the bonding energy of the grain boundary is reduced, the tempering brittleness during heat treatment is increased, and the impact toughness is reduced. Therefore, the invention controls P to be less than or equal to 0.015 percent.
S is easy to form sulfide inclusions, and influences the fatigue performance and the corrosion resistance of the chain. Therefore, the invention controls the S to be less than or equal to 0.008 percent.
Cr can increase the hardenability of steel to increase the strength of a chain and can also suitably improve the wear resistance and corrosion resistance, but increases the ductile-brittle transition temperature of steel, which is disadvantageous to low-temperature toughness. Therefore, the Cr content is controlled to be 0.5-1.2%.
Ni can enlarge the austenite region, refine grains and improve the toughness, corrosion resistance and fatigue resistance of the steel. Meanwhile, Ni is not easy to burn in the flash welding seam, and the welding seam performance can be improved. In addition, the nickel can also obviously improve the low-temperature toughness of the chain, and the cost performance is reduced due to the excessively high content. Therefore, the Ni content is controlled to be 0.6-2.0 percent.
Mo is beneficial to refining crystal grains, reducing the tempering brittleness, reducing the ductile-brittle transition temperature and improving the low-temperature toughness of the chain. The effect of too high content is reduced, and the cost performance is influenced. Therefore, the content of Mo is controlled to be 0.3-0.6%.
Al is a refined grain element, but is likely to form alumina inclusions during flash welding, and is detrimental to weld toughness. Therefore, the Al content is controlled to be 0.02-0.05%.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A low temperature resistant anchor chain which characterized in that: the paint mainly comprises the following components in percentage by mass: c: 0.25-0.45%, Si is less than or equal to 0.5%, Mn: 0.5-1.2%, P is less than or equal to 0.015%, S is less than or equal to 0.008%, Cr: 0.5-1.2%, Ni: 0.5-1.2%, Mo: 0.3-0.6%, Al: 0.02-0.05%.
2. A low temperature resistant anchor chain according to claim 1, wherein: the mass percent of the C content is 0.20-0.35%, and the mass percent of the Ni content is 0.6-2.0%.
3. A low temperature resistant anchor chain according to claim 1, wherein: the low-temperature-resistant anchor chain material has the yield strength of more than or equal to 450MPa, the tensile strength of more than or equal to 700MPa, the elongation of more than or equal to 12 percent and the shrinkage of more than or equal to 50 percent at the temperature of minus 20 ℃.
4. A low temperature resistant anchor chain according to claim 1, wherein: the impact energy of the ring back Charpy notch of the anchor chain at the temperature of minus 20 ℃ is more than or equal to 60J, and the impact energy of the welding seam Charpy notch of the anchor chain at the temperature of minus 20 ℃ is more than or equal to 40J.
5. A low temperature resistant anchor chain according to claim 1, wherein: the impact energy of the ring back Charpy notch is more than or equal to 50J at the temperature of minus 40 ℃, and the impact energy of the welding seam Charpy notch of the anchor chain is more than or equal to 30J at the temperature of minus 40 ℃.
6. A low temperature resistant anchor chain according to claim 1, wherein: the breaking stress is more than or equal to 450MPa at the temperature of minus 20 ℃.
7. A low temperature resistant anchor chain according to claim 1, wherein: the loop temperature of the anchor chain in the production process is not more than 920 ℃, and the loop temperature in the heat treatment process is not more than 980 ℃.
8. A low temperature resistant anchor chain according to claim 1, wherein: and water cooling is adopted during the heat treatment tempering of the chain, and the tempering temperature is 630-690 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111560363.7A CN114369759A (en) | 2021-12-20 | 2021-12-20 | Low temperature resistant anchor chain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111560363.7A CN114369759A (en) | 2021-12-20 | 2021-12-20 | Low temperature resistant anchor chain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114369759A true CN114369759A (en) | 2022-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111560363.7A Withdrawn CN114369759A (en) | 2021-12-20 | 2021-12-20 | Low temperature resistant anchor chain |
Country Status (1)
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| CN (1) | CN114369759A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116623103A (en) * | 2023-05-16 | 2023-08-22 | 南京钢铁股份有限公司 | Breaking force 120 kN-level high-strength chain and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62260043A (en) * | 1986-05-02 | 1987-11-12 | Nippon Steel Corp | Steel for high strength chain of large diameter having superior toughness at low temperature |
| CN101182622A (en) * | 2007-12-18 | 2008-05-21 | 江苏沙钢集团淮钢特钢有限公司 | High intensity, corrosion resistant and high ductility steel for mooring chain and production process thereof |
| CN101781698A (en) * | 2009-10-27 | 2010-07-21 | 中国海洋石油总公司 | Thermal treatment process of R5 mooring chain |
| CN103114255A (en) * | 2011-11-17 | 2013-05-22 | 江苏亚星锚链股份有限公司 | Prescription of R5-level mooring chain and heat treatment process |
| CN104962832A (en) * | 2015-05-07 | 2015-10-07 | 马钢(集团)控股有限公司 | Niobium-containing R4 mooring cable steel and heat treatment technology and production method thereof |
| CN105624566A (en) * | 2016-01-05 | 2016-06-01 | 江阴兴澄特种钢铁有限公司 | R5 grade mooring chain steel with high strength and low heat treatment sensitivity and manufacturing method of R5 grade mooring chain steel |
| CN107304458A (en) * | 2016-04-21 | 2017-10-31 | 北大方正集团有限公司 | A kind of hot-rolled steel and its manufacture method, mooring cable and its manufacture method |
| CN109321820A (en) * | 2018-09-30 | 2019-02-12 | 镇江宝海船舶五金有限公司 | A kind of high intensity R4 mooring chain steel and preparation method thereof |
| CN110144516A (en) * | 2019-04-16 | 2019-08-20 | 江阴兴澄特种钢铁有限公司 | A kind of R6 grade high-strength tenacity marine mooring chain steel and its mooring cable suitable for the positioning cathodic protection floating body that anchors |
| CN110983205A (en) * | 2019-12-26 | 2020-04-10 | 宝钢特钢韶关有限公司 | Mooring chain steel and preparation method thereof |
| CN111334725A (en) * | 2020-04-08 | 2020-06-26 | 中天钢铁集团有限公司 | Low-carbon ultrahigh-strength alloy chain steel wire rod and manufacturing method thereof |
| CN112011727A (en) * | 2019-05-28 | 2020-12-01 | 宝山钢铁股份有限公司 | Ultrahigh-strength low-temperature-toughness steel, ultrahigh-strength low-temperature-toughness bar and manufacturing method thereof |
| CN113322420A (en) * | 2020-02-28 | 2021-08-31 | 宝山钢铁股份有限公司 | Yield ratio controlled steel with excellent low-temperature impact toughness and manufacturing method thereof |
-
2021
- 2021-12-20 CN CN202111560363.7A patent/CN114369759A/en not_active Withdrawn
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62260043A (en) * | 1986-05-02 | 1987-11-12 | Nippon Steel Corp | Steel for high strength chain of large diameter having superior toughness at low temperature |
| CN101182622A (en) * | 2007-12-18 | 2008-05-21 | 江苏沙钢集团淮钢特钢有限公司 | High intensity, corrosion resistant and high ductility steel for mooring chain and production process thereof |
| CN101781698A (en) * | 2009-10-27 | 2010-07-21 | 中国海洋石油总公司 | Thermal treatment process of R5 mooring chain |
| CN103114255A (en) * | 2011-11-17 | 2013-05-22 | 江苏亚星锚链股份有限公司 | Prescription of R5-level mooring chain and heat treatment process |
| CN104962832A (en) * | 2015-05-07 | 2015-10-07 | 马钢(集团)控股有限公司 | Niobium-containing R4 mooring cable steel and heat treatment technology and production method thereof |
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| CN107304458A (en) * | 2016-04-21 | 2017-10-31 | 北大方正集团有限公司 | A kind of hot-rolled steel and its manufacture method, mooring cable and its manufacture method |
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| CN110144516A (en) * | 2019-04-16 | 2019-08-20 | 江阴兴澄特种钢铁有限公司 | A kind of R6 grade high-strength tenacity marine mooring chain steel and its mooring cable suitable for the positioning cathodic protection floating body that anchors |
| CN112011727A (en) * | 2019-05-28 | 2020-12-01 | 宝山钢铁股份有限公司 | Ultrahigh-strength low-temperature-toughness steel, ultrahigh-strength low-temperature-toughness bar and manufacturing method thereof |
| CN110983205A (en) * | 2019-12-26 | 2020-04-10 | 宝钢特钢韶关有限公司 | Mooring chain steel and preparation method thereof |
| CN113322420A (en) * | 2020-02-28 | 2021-08-31 | 宝山钢铁股份有限公司 | Yield ratio controlled steel with excellent low-temperature impact toughness and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116623103A (en) * | 2023-05-16 | 2023-08-22 | 南京钢铁股份有限公司 | Breaking force 120 kN-level high-strength chain and preparation method thereof |
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Application publication date: 20220419 |