CN113814365A - Casting process control method for directly turning non-quenched and tempered steel - Google Patents
Casting process control method for directly turning non-quenched and tempered steel Download PDFInfo
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- CN113814365A CN113814365A CN202110971664.2A CN202110971664A CN113814365A CN 113814365 A CN113814365 A CN 113814365A CN 202110971664 A CN202110971664 A CN 202110971664A CN 113814365 A CN113814365 A CN 113814365A
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- 238000005266 casting Methods 0.000 title claims abstract description 93
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 72
- 239000010959 steel Substances 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000005520 cutting process Methods 0.000 claims abstract description 28
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 239000002893 slag Substances 0.000 claims description 33
- 239000003795 chemical substances by application Substances 0.000 claims description 21
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000000446 fuel Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- 239000007790 solid phase Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 description 11
- 238000007254 oxidation reaction Methods 0.000 description 11
- 239000000843 powder Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/116—Refining the metal
- B22D11/117—Refining the metal by treating with gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/111—Treating the molten metal by using protecting powders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
- B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling
Abstract
The invention discloses a method for controlling a casting process of directly turning non-quenched and tempered steel, which relates to the technical field of steel production, and comprises large ladle protection casting, middle ladle protection casting, crystallizer protection casting, secondary cooling, soft reduction, cutting and deburring, so that the surface quality of a casting blank can be stably controlled, the surface detection qualified rate of a rolled material is increased from less than 50% to more than 92%, the product quality is improved, the high strength and high toughness of the produced non-quenched and tempered steel are ensured, and the stable use and the service life of a piston rod of an oil cylinder are ensured.
Description
Technical Field
The invention relates to the technical field of steel production, in particular to a method for controlling a casting process of directly turning non-quenched and tempered steel.
Background
The direct turning of the non-quenched and tempered steel has high requirements on the quality of the surface of a casting blank, the direct turning of the non-quenched and tempered steel contains N and belongs to the category of crack sensitive steel, and a proper continuous pouring control method is the key for controlling the surface quality of the casting blank of the direct turning of the non-quenched and tempered steel. At present, the casting process control method for directly turning non-tempered steel comprises the following steps: through the production line of the process of steel ladle, tundish, crystallizer, secondary cooling and cutting, the protection ratio of molten steel is realized by adopting a protection sleeve, an inert gas environment, a covering agent and crystallizer protection slag to avoid secondary oxidation of the molten steel, and the crystallizer protection slag adopts general protection slag. The casting blank poured by the method is easy to have the defects of surface cracks, air holes, slag pits and the like, and the surface detection qualified rate of the rolled material is below 50%.
Disclosure of Invention
Aiming at the technical problems, the invention overcomes the defects of the prior art and provides a method for controlling the casting process of directly turning non-quenched and tempered steel, which comprises the following steps:
(1) ladle protected pouring
A large-package protective sleeve is adopted, a sealing gasket is added, and argon sealing and an argon ring are adopted;
(2) tundish protection pouring
a. An inner submerged nozzle is adopted and inserted into the crystallizer to a proper depth;
b. adopting a middle ladle double-layer covering agent, uniformly adding 160kg of lower-layer covering agent into the middle ladle when the weight of the middle ladle molten steel reaches 15t after the large ladle is cast, uniformly adding 160kg of lower-layer covering agent into the middle ladle when the weight of the middle ladle molten steel reaches 28t, and adding the covering agent with proper thickness on the surface of the middle ladle molten steel;
(3) casting with crystallizer protection
a. The crystallizer covering slag is adopted, the surface of molten steel in the crystallizer is fully covered in the whole pouring process, and a slag layer with proper thickness is maintained;
b. according to the characteristics of the steel grade, special crystallizer covering slag is adopted;
(4) secondary cooling
a. Combining the design capability of a casting machine, adopting 0.27 l/kg specific water quantity at a proper pulling speed of a 250 x 300 section, adopting 0.23 l/kg specific water quantity at a proper pulling speed of a 320 x 420 section, and controlling the straightening temperature to be 950-980 ℃;
b. the pressure of the two cold gases is controlled at 0.65MPa, and the air flow is controlled at 160-170m3/h；
(5) Under light pressure
Combining the design capability of a casting machine, and adopting proper soft reduction according to the change condition of the central solid phase rate of the casting blank in the cooling process of the casting blank at proper pulling speed and specific water amount;
(6) cutting deburring
Controlling the oxygen-fuel ratio of flame cutting, cutting and flattening the section of the casting blank, controlling the speed of the casting blank passing through a burr machine, and removing cutting and slag adhering of the casting blank.
The technical scheme of the invention is further defined as follows:
in the method for controlling the casting process of the directly turned non-quenched and tempered steel, the water gap in the step (2) is inserted into the crystallizer by 150 mm and 250 mm.
The method for controlling the casting process of the directly turned non-quenched and tempered steel comprises the step (3) of adopting the special crystallizer casting powder with the alkalinity of 0.6-0.8, the viscosity of 0.6-0.9Pa.s and the TC of 14-17%.
The method for controlling the casting process of the directly turned non-quenched and tempered steel comprises the step (3) of maintaining a slag layer with the thickness of 3-5 cm.
In the method for controlling the casting process of the direct turning non-quenched and tempered steel, the drawing speed of 250 x 300 sections and the drawing speed of 320 x 420 sections are 0.85m/min in the step (4).
In the method for controlling the casting process of the direct turning non-quenched and tempered steel, the drawing speed of 250 x 300 sections and the drawing speed of 320 x 420 sections are 0.51m/min in the step (5).
The method for controlling the casting process of the directly turned non-quenched and tempered steel comprises the step (6) of controlling the oxygen-fuel ratio of flame cutting to be 3:1 and controlling the speed of a casting blank burr passing machine to be 1 m/min.
The invention has the beneficial effects that:
(1) the non-quenched and tempered steel can stably control the surface quality of a casting blank, the surface detection qualified rate of rolled materials is increased from less than 50% to more than 92%, the product quality is improved, the high strength and high toughness of the produced non-quenched and tempered steel are ensured, and the stable use and the service life of an oil cylinder piston rod are ensured;
(2) according to the invention, the insertion depth of the water gap is controlled to be 150-250mm, and molten steel in the surface crystallizer can roll slag, so that the thickness of a billet shell of the billet outlet crystallizer is ensured, and the occurrence of casting blank slag inclusion and steel leakage is prevented;
(3) in the invention, the powder slag layer with the thickness of 3-5cm is maintained by adopting the alkalinity of 0.6-0.8, the viscosity of 0.6-0.9Pa.s and the TC of 14-17 percent, so that the secondary oxidation of molten steel can be prevented, the melting rate of the casting powder slag is stabilized, a uniform slag film is formed between the blank shell and the wall of the crystallizer, the cooling rate of the blank shell is controlled, the lubrication effect is realized, and the generation of cracks on the surface of a casting blank is prevented;
(4) according to the invention, the drawing speed of a 250-300 section is 0.85m/min, the drawing speed of a 320-420 section is 0.51m/min, the cooling rate of a casting blank can be stabilized, the straightening temperature of the casting blank is controlled within the range of 950-980 ℃, and the brittle zone of the steel blank is avoided to prevent the generation of straightening stress cracks;
(5) according to the invention, the oxygen-fuel ratio of flame cutting is controlled to be 3:1, the speed of the casting blank passing through the burr machine is controlled to be 1m/min, the flame cutting process can be stabilized, the flatness of a cutting surface is ensured, the cutting slag of the casting blank is effectively removed, and the end surface quality of the casting blank is ensured.
Detailed Description
Example 1
The method for controlling the casting process of the directly turned non-quenched and tempered steel comprises the following steps:
(1) ladle protected pouring
A large-package protective sleeve is adopted, a sealing gasket is added, and an argon seal and an argon ring are adopted, so that secondary oxidation of molten steel is avoided;
(2) tundish protection pouring
a. An internally-installed submerged nozzle is adopted and inserted into the crystallizer for 180mm in depth, so that secondary oxidation and slag entrapment of molten steel are avoided;
b. adopting a middle ladle double-layer covering agent, uniformly adding 160kg of lower-layer covering agent into a middle ladle when the weight of middle ladle molten steel reaches 15t after a large ladle is poured, uniformly adding 160kg of lower-layer covering agent into the middle ladle when the weight of middle ladle molten steel reaches 28t, and adding the covering agent with the thickness of 5cm on the surface of the molten steel in the middle ladle;
(3) casting with crystallizer protection
a. The crystallizer casting powder is adopted, the surface of molten steel in the crystallizer is fully covered in the whole pouring process, a slag layer with the thickness of 3cm is maintained, and secondary oxidation of the molten steel is prevented;
b. according to the characteristics of steel grades, special crystallizer covering slag with the alkalinity of 0.72, the viscosity of 0.6Pa.s and the TC of 14.82 percent is adopted;
(4) secondary cooling
a. Combining the design capability of a casting machine, adopting 0.27 l/kg of specific water quantity at the drawing speed of 0.85m/min of a 250 x 300 section, controlling the straightening temperature to 970 ℃, and avoiding the generation of straightening cracks;
b. the pressure of the secondary cooling air is controlled at 0.65MPa, and the air flow is controlled at 170m3The secondary cooling strength and uniformity of the casting blank are ensured, and the casting blank is prevented from generating thermal stress cracks;
(5) under light pressure
Combining the design capability of a casting machine, and adopting soft reduction of 11mm of total reduction according to the change condition of the central solid phase rate of the casting blank in the cooling process of the casting blank at the pulling speed of 0.85m/min and the specific water amount of 0.27 l/kg to improve the central carbon segregation of the casting blank;
(6) cutting deburring
Controlling the oxygen-fuel ratio of flame cutting to be 3:1, cutting and flattening the section of the casting blank, controlling the speed of a casting blank burr passing machine to be 1m/min, and removing cutting and slag adhering of the casting blank.
Example 2
The method for controlling the casting process of the directly turned non-quenched and tempered steel comprises the following steps:
(1) ladle protected pouring
A large-package protective sleeve is adopted, a sealing gasket is added, and an argon seal and an argon ring are adopted, so that secondary oxidation of molten steel is avoided;
(2) tundish protection pouring
a. An internally-installed submerged nozzle is adopted and inserted into the crystallizer by the depth of 200mm, so that secondary oxidation and slag entrapment of molten steel are avoided;
b. adopting a middle ladle double-layer covering agent, uniformly adding 160kg of lower-layer covering agent into a middle ladle when the weight of middle ladle molten steel reaches 15t after a large ladle is poured, uniformly adding 160kg of lower-layer covering agent into the middle ladle when the weight of middle ladle molten steel reaches 28t, and adding the covering agent with the thickness of 5cm on the surface of the molten steel in the middle ladle;
(3) casting with crystallizer protection
a. The crystallizer casting powder is adopted, the surface of molten steel in the crystallizer is fully covered in the whole pouring process, a slag layer with the thickness of 4cm is maintained, and secondary oxidation of the molten steel is prevented;
b. according to the characteristics of steel grades, special crystallizer covering slag with the alkalinity of 0.74, the viscosity of 0.62Pa.s and the TC of 15.13 percent is adopted;
(4) secondary cooling
a. Combining the design capability of a casting machine, adopting 0.23 l/kg of specific water quantity at the drawing speed of 0.51m/min for the 320-420 section, controlling the straightening temperature at 972 ℃, and avoiding the generation of straightening cracks;
b. the pressure of the secondary cooling air is controlled at 0.65MPa, and the air flow is controlled at 165m3The secondary cooling strength and uniformity of the casting blank are ensured, and the casting blank is prevented from generating thermal stress cracks;
(5) under light pressure
Combining the design capability of a casting machine, and adopting soft reduction of 11mm of total reduction according to the change condition of the central solid phase rate of the casting blank in the cooling process of the casting blank at the pulling speed of 0.51m/min and the specific water amount of 0.23 l/kg to improve the central carbon segregation of the casting blank;
(6) cutting deburring
Controlling the oxygen-fuel ratio of flame cutting to be 3:1, cutting and flattening the section of the casting blank, controlling the speed of a casting blank burr passing machine to be 1m/min, and removing cutting and slag adhering of the casting blank.
Example 3
The method for controlling the casting process of the directly turned non-quenched and tempered steel comprises the following steps:
(1) ladle protected pouring
A large-package protective sleeve is adopted, a sealing gasket is added, and an argon seal and an argon ring are adopted, so that secondary oxidation of molten steel is avoided;
(2) tundish protection pouring
a. An inner submerged nozzle is adopted and inserted into the crystallizer by the depth of 230mm, so that secondary oxidation and slag entrapment of molten steel are avoided;
b. adopting a middle ladle double-layer covering agent, uniformly adding 160kg of lower-layer covering agent into a middle ladle when the weight of middle ladle molten steel reaches 15t after a large ladle is poured, uniformly adding 160kg of lower-layer covering agent into the middle ladle when the weight of middle ladle molten steel reaches 28t, and adding the covering agent with the thickness of 5cm on the surface of the molten steel in the middle ladle;
(3) casting with crystallizer protection
a. The crystallizer casting powder is adopted, the surface of molten steel in the crystallizer is fully covered in the whole pouring process, a slag layer with the thickness of 5cm is maintained, and secondary oxidation of the molten steel is prevented;
b. according to the characteristics of steel grades, special crystallizer covering slag with the alkalinity of 0.7, the viscosity of 0.68Pa.s and the TC of 16.2 percent is adopted;
(4) secondary cooling
a. Combining the design capability of a casting machine, adopting 0.23 l/kg of specific water quantity at the drawing speed of 0.51m/min for the 320-420 section, controlling the straightening temperature to 970 ℃, and avoiding the generation of straightening cracks;
b. the pressure of the secondary cooling air is controlled to be 0.65MPa, and the air flow is controlled to be 168m3The secondary cooling strength and uniformity of the casting blank are ensured, and the casting blank is prevented from generating thermal stress cracks;
(5) under light pressure
Combining the design capability of a casting machine, and adopting soft reduction of 11mm of total reduction according to the change condition of the central solid phase rate of the casting blank in the cooling process of the casting blank at the pulling speed of 0.51m/min and the specific water amount of 0.23 l/kg to improve the central carbon segregation of the casting blank;
(6) cutting deburring
Controlling the oxygen-fuel ratio of flame cutting to be 3:1, cutting and flattening the section of the casting blank, controlling the speed of a casting blank burr passing machine to be 1m/min, and removing cutting and slag adhering of the casting blank.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (7)
1. A method for controlling the casting process of directly turning non-quenched and tempered steel is characterized by comprising the following steps: the method comprises the following steps:
(1) ladle protected pouring
A large-package protective sleeve is adopted, a sealing gasket is added, and argon sealing and an argon ring are adopted;
(2) tundish protection pouring
a. An inner submerged nozzle is adopted and inserted into the crystallizer to a proper depth;
b. adopting a middle ladle double-layer covering agent, uniformly adding 160kg of lower-layer covering agent into the middle ladle when the weight of the middle ladle molten steel reaches 15t after the large ladle is cast, uniformly adding 160kg of lower-layer covering agent into the middle ladle when the weight of the middle ladle molten steel reaches 28t, and adding the covering agent with proper thickness on the surface of the middle ladle molten steel;
(3) casting with crystallizer protection
a. The crystallizer covering slag is adopted, the surface of molten steel in the crystallizer is fully covered in the whole pouring process, and a slag layer with proper thickness is maintained;
b. according to the characteristics of the steel grade, special crystallizer covering slag is adopted;
(4) secondary cooling
a. Combining the design capability of a casting machine, adopting 0.27 l/kg specific water quantity at a proper pulling speed of a 250 x 300 section, adopting 0.23 l/kg specific water quantity at a proper pulling speed of a 320 x 420 section, and controlling the straightening temperature to be 950-980 ℃;
b. the pressure of the two cold gases is controlled at 0.65MPa, and the air flow is controlled at 160-170m3/h；
(5) Under light pressure
Combining the design capability of a casting machine, and adopting proper soft reduction according to the change condition of the central solid phase rate of the casting blank in the cooling process of the casting blank at proper pulling speed and specific water amount;
(6) cutting deburring
Controlling the oxygen-fuel ratio of flame cutting, cutting and flattening the section of the casting blank, controlling the speed of the casting blank passing through a burr machine, and removing cutting and slag adhering of the casting blank.
2. The method for controlling the casting process of the direct turning non-quenched and tempered steel according to claim 1, wherein the method comprises the following steps: and (3) inserting the water gap in the step (2) into the crystallizer for 150 mm and 250 mm.
3. The method for controlling the casting process of the direct turning non-quenched and tempered steel according to claim 1, wherein the method comprises the following steps: the step (3) adopts special crystallizer covering slag with alkalinity of 0.6-0.8, viscosity of 0.6-0.9Pa.s and TC of 14-17%.
4. The method for controlling the casting process of the direct turning non-quenched and tempered steel according to claim 1, wherein the method comprises the following steps: and (3) maintaining a slag layer with the thickness of 3-5 cm.
5. The method for controlling the casting process of the direct turning non-quenched and tempered steel according to claim 1, wherein the method comprises the following steps: and (4) adopting a 0.85m/min pulling speed for the section 250X 300 and adopting a 0.51m/min pulling speed for the section 320X 420.
6. The method for controlling the casting process of the direct turning non-quenched and tempered steel according to claim 1, wherein the method comprises the following steps: and (5) adopting a 0.85m/min pulling speed for the section 250X 300 and adopting a 0.51m/min pulling speed for the section 320X 420.
7. The method for controlling the casting process of the direct turning non-quenched and tempered steel according to claim 1, wherein the method comprises the following steps: and (6) controlling the oxygen-fuel ratio of flame cutting to be 3:1, and controlling the speed of the casting blank burr passing machine to be 1 m/min.
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| CN202110971664.2A CN113814365A (en) | 2021-08-24 | 2021-08-24 | Casting process control method for directly turning non-quenched and tempered steel |
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| CN202110971664.2A CN113814365A (en) | 2021-08-24 | 2021-08-24 | Casting process control method for directly turning non-quenched and tempered steel |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699301A (en) * | 2012-06-26 | 2012-10-03 | 南京钢铁股份有限公司 | Steel continuous casting process for ultra supercritical high-pressure boiler tube |
| CN104128582A (en) * | 2014-07-24 | 2014-11-05 | 南京钢铁股份有限公司 | Continuous casting technology for steel for sawing wires for photovoltaic industry |
| CN105710328A (en) * | 2014-12-05 | 2016-06-29 | 重庆永林机械设备有限公司 | 30MnSi continuous casting process |
| CN107287504A (en) * | 2017-06-16 | 2017-10-24 | 上海大学 | The middle carbon easy-cutting non-hardened and tempered steel and its manufacturing technique method of sulfur-bearing, tellurium |
| CN109988972A (en) * | 2019-04-23 | 2019-07-09 | 中天钢铁集团有限公司 | A kind of low-carbon sulfur-bearing air conditioner tube round steel and its production technology |
-
2021
- 2021-08-24 CN CN202110971664.2A patent/CN113814365A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699301A (en) * | 2012-06-26 | 2012-10-03 | 南京钢铁股份有限公司 | Steel continuous casting process for ultra supercritical high-pressure boiler tube |
| CN104128582A (en) * | 2014-07-24 | 2014-11-05 | 南京钢铁股份有限公司 | Continuous casting technology for steel for sawing wires for photovoltaic industry |
| CN105710328A (en) * | 2014-12-05 | 2016-06-29 | 重庆永林机械设备有限公司 | 30MnSi continuous casting process |
| CN107287504A (en) * | 2017-06-16 | 2017-10-24 | 上海大学 | The middle carbon easy-cutting non-hardened and tempered steel and its manufacturing technique method of sulfur-bearing, tellurium |
| CN109988972A (en) * | 2019-04-23 | 2019-07-09 | 中天钢铁集团有限公司 | A kind of low-carbon sulfur-bearing air conditioner tube round steel and its production technology |
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Application publication date: 20211221 |