CN112522569A - Unrefined titanium-added deformed steel making method - Google Patents
Unrefined titanium-added deformed steel making method Download PDFInfo
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- CN112522569A CN112522569A CN202011183619.2A CN202011183619A CN112522569A CN 112522569 A CN112522569 A CN 112522569A CN 202011183619 A CN202011183619 A CN 202011183619A CN 112522569 A CN112522569 A CN 112522569A
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- alloy
- deformed steel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/006—Making ferrous alloys compositions used for making ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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- 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
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- 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
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- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
Abstract
The invention discloses a method for smelting titanium-added deformed steel without refining, which relates to the field of ferrous metallurgy and comprises the following raw materials: silicomanganese alloy, ferrosilicon alloy and ferrotitanium alloy. By changing the process components, the ferrotitanium is added into the original silicomanganese, ferrosilicon and vanadium-nitrogen alloy, the vanadium-nitrogen alloy is cancelled, the consumption of vanadium and nitrogen in the steel smelting is about 0.3-0.5 kg/t, the price continuously rises, the alloy cost can be reduced after cancellation, the consumption of silicomanganese and iron is reduced, the consumption of ferrosilicon is cancelled, a slag surface deoxidizer is added to adjust the molten steel, continuous casting protection pouring is adopted, the target consumption of the alloy is increased from the original 26.3kg/t to 27.6kg/t, the cost is reduced to 36.1 yuan/t, the consumption cost of the deoxidizer can be reduced by 31.3 yuan/t after removal, and better economic benefit can be obtained.
Description
Technical Field
The invention relates to the field of ferrous metallurgy, in particular to a method for making titanium-added deformed steel without refining.
Background
The deformed steel bar is a common name of a hot-rolled ribbed steel bar, the mark of a common hot-rolled steel bar is formed by HRB and the minimum value of the yield point of the mark, H, R, B is respectively an English first letter of hot rolling, ribbed steel bar and three words, the transverse rib geometry of imported deformed steel bar is mainly a common square thread or a common rhombic thread, the transverse rib geometry of domestic deformed steel bar is mainly three types of spiral, herringbone and crescent, and the principle of ordering the deformed steel bar is that the mechanical technological property or the mechanical strength index is mainly used on the basis of meeting the requirement of the gripping property required by engineering design.
The conventional 400MPa deformed steel bar mainly comprises silicon-manganese alloy, silicon-iron alloy and vanadium-nitrogen alloy, wherein the consumption of the vanadium-nitrogen alloy is about 0.3-0.5 kg/t, and the alloy cost of the deformed steel bar is greatly increased along with the increase of the price of the vanadium-nitrogen alloy.
Disclosure of Invention
The invention aims to: the titanium-added deformed steel bar steelmaking method without over refining is provided for solving the problems that the main alloy of the existing 400MPa deformed steel bar comprises silicomanganese, ferrosilicon and vanadium-nitrogen, wherein the consumption of the vanadium-nitrogen is about 0.3-0.5 kg/t, and the alloy cost of the deformed steel bar greatly rises along with the rising of the price of the vanadium-nitrogen alloy.
In order to achieve the purpose, the invention provides the following technical scheme: a method for making titanium-added deformed steel without refining comprises the following raw materials: silicomanganese alloy, ferrosilicon alloy and ferrotitanium alloy.
Preferably, the raw material finished product comprises the following components in percentage by mass: 0.23 to 0.25 percent of carbon; 0.40 to 0.48 percent of silicon; 1.35 to 1.43 percent of manganese; 0 to 0.040 percent of phosphorus; 0-0.040% of sulfur and 0-0.38% of copper; 0.020-0.025% of vanadium.
Preferably, the method comprises the following steps:
s1: melting water in a blast furnace;
s2: carrying out converter production;
s3: adding ferro-silico-manganese into molten steel components during converter tapping, and canceling adding of ferro-silicon;
s4: after steel is discharged, adding a slag surface deoxidizer for deoxidation, and then adding ferrotitanium;
s5: but refining, directly casting and protecting pouring.
Preferably, the blast furnace molten water in S1 is melted, and the blast furnace steelmaking temperature is controlled to be 920-950 ℃.
Preferably, after steel is discharged in S4, a slag surface deoxidizer is added for deoxidation, and ferrotitanium is added, wherein the slag surface deoxidizer is a sulfite deoxidizer, wherein disulfite is used as a main agent, and Ca (OH)2 and activated carbon are used as auxiliary agents.
Preferably, said S5 is not refined, and is directly continuously cast to protect the casting, wherein the continuous casting includes: continuous casting of square billets, continuous casting of high wire press, and continuous casting of bar mills.
Preferably, after the continuous casting at S5, the steps of controlled rolling and controlled cooling, cooling by a cooling bed, cutting to length, collecting and bundling, weighing, quality inspection, warehousing and listing are also required.
Compared with the prior art, the invention has the beneficial effects that:
1. by changing the process components, the ferrotitanium is added into the original silicomanganese, ferrosilicon and vanadium-nitrogen alloy, the vanadium-nitrogen alloy is cancelled, the consumption of vanadium and nitrogen in the steel smelting is about 0.3-0.5 kg/t, the price continuously rises, the alloy cost can be reduced after cancellation, the consumption of silicomanganese and iron is reduced, the consumption of ferrosilicon is cancelled, a slag surface deoxidizer is added to adjust the molten steel, continuous casting protection pouring is adopted, the target consumption of the alloy is increased from the original 26.3kg/t to 27.6kg/t, the cost is reduced to 36.1 yuan/t, the consumption cost of the deoxidizer can be reduced by 31.3 yuan/t after removal, and better economic benefit can be obtained.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations and positional relationships shown, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The following describes an embodiment of the present invention based on its overall structure.
A method for making titanium-added deformed steel without refining comprises the following raw materials: silicomanganese alloy, ferrosilicon alloy and ferrotitanium alloy.
By changing the process components, the ferrotitanium is added into the original silicomanganese, ferrosilicon and vanadium-nitrogen alloy, the vanadium-nitrogen alloy is cancelled, the consumption of vanadium and nitrogen in the steel smelting is about 0.3-0.5 kg/t, the price continuously rises, the alloy cost can be reduced after cancellation, the consumption of silicomanganese and iron is reduced, the consumption of ferrosilicon is cancelled, a slag surface deoxidizer is added to adjust the molten steel, continuous casting protection pouring is adopted, the target consumption of the alloy is increased from the original 26.3kg/t to 27.6kg/t, the cost is reduced to 36.1 yuan/t, the consumption cost of the deoxidizer can be reduced by 31.3 yuan/t after removal, and better economic benefit can be obtained.
The raw material finished product comprises the following components in percentage by mass: 0.23 to 0.25 percent of carbon; 0.40 to 0.48 percent of silicon; 1.35 to 1.43 percent of manganese; 0 to 0.040 percent of phosphorus; 0-0.040% of sulfur and 0-0.38% of copper; 0.020-0.025% of vanadium.
In the invention, the prior deformed steel bar has the component proportion shown in table 1, and the deformed steel bar produced by the process has the component proportion shown in table 2
TABLE 1
TABLE 2
Compared with the components in Table 1 and Table 2, the sulfur and the sulfur are increased, the Ti is reduced, the cost is reduced to 36.1 yuan/t, and the consumption cost can be reduced by 31.3 yuan/t by removing the deoxidizer.
The method comprises the following steps:
s1: melting water in a blast furnace;
s2: carrying out converter production;
s3: adding ferro-silico-manganese into molten steel components during converter tapping, and canceling adding of ferro-silicon;
s4: after steel is discharged, adding a slag surface deoxidizer for deoxidation, and then adding ferrotitanium;
s5: but refining, directly casting and protecting pouring.
In the invention, 19.9kg/t of ferro-silico-manganese is added in the tapping process in the production of the converter.
S1, melting water in the blast furnace, and controlling the steelmaking temperature of the blast furnace to be 920-950 ℃.
In the invention, the process requirements of SG400-T5 are met.
And (3) after steel is discharged from S4, adding a slag surface deoxidizer for deoxidation, and then adding ferrotitanium, wherein the slag surface deoxidizer is a sulfite deoxidizer, and disulfite is used as a main agent, and Ca (OH)2 and activated carbon are used as auxiliary agents.
In the present invention, the type of the deoxidizer is not changed and the cost of the deoxidizer is not changed as compared with the conventional production process.
And S5, directly casting the casting mold without refining, wherein the continuous casting comprises: continuous casting of square billets, continuous casting of high wire press, and continuous casting of bar mills.
In the invention, tests show that the shape and the quality of the finished deformed steel bar are not changed after refining, compared with the original production steps, the method saves a part of energy consumption and reduces the production cost after refining.
And after S5 continuous casting is finished, the working procedures of controlled rolling and controlled cooling, cooling by a cooling bed, cutting to length, collecting and bundling, weighing, quality inspection, warehousing and listing are required.
According to the invention, the alloy raw materials and the later process are adjusted to obtain the steel billets meeting the subsequent rolling requirements, and the steel billets are produced according to the normal production sequence.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. The method for making the titanium-added deformed steel without refining is characterized by comprising the following raw materials: silicomanganese alloy, ferrosilicon alloy and ferrotitanium alloy.
2. The method of making unrefined titanized deformed steel bar as set forth in claim 1, wherein: the raw material finished product comprises the following components in percentage by mass: 0.23 to 0.25 percent of carbon; 0.40 to 0.48 percent of silicon; 1.35 to 1.43 percent of manganese; 0 to 0.040 percent of phosphorus; 0-0.040% of sulfur and 0-0.38% of copper; 0.020-0.025% of vanadium.
3. The method of making unrefined titanized deformed steel bar as set forth in claim 1, including the steps of:
s1: melting water in a blast furnace;
s2: carrying out converter production;
s3: adding ferro-silico-manganese into molten steel components during converter tapping, and canceling adding of ferro-silicon;
s4: after steel is discharged, adding a slag surface deoxidizer for deoxidation, and then adding ferrotitanium;
s5: but refining, directly casting and protecting pouring.
4. A process for making unrefined titanized deformed steel bar as claimed in claim 3, wherein: and in the S1, the blast furnace molten water is controlled to be at 920-950 ℃.
5. A process for making unrefined titanized deformed steel bar as claimed in claim 3, wherein: and after steel is discharged in the S4, adding a slag surface deoxidizer for deoxidation, and then adding ferrotitanium, wherein the slag surface deoxidizer is a sulfite deoxidizer, and disulfite is used as a main agent, and Ca (OH)2 and activated carbon are used as auxiliary agents.
6. A process for making unrefined titanized deformed steel bar as claimed in claim 3, wherein: in the step S5, refining is not performed, and continuous casting protection pouring is directly performed, wherein the continuous casting comprises the following steps: continuous casting of square billets, continuous casting of high wire press, and continuous casting of bar mills.
7. A process for making unrefined titanized deformed steel bar as claimed in claim 3, wherein: and after the S5 continuous casting is finished, the working procedures of controlled rolling and controlled cooling, cooling by a cooling bed, cutting to length, collecting and bundling, weighing, quality inspection, warehousing and brand hanging are required.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011183619.2A CN112522569A (en) | 2020-10-29 | 2020-10-29 | Unrefined titanium-added deformed steel making method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011183619.2A CN112522569A (en) | 2020-10-29 | 2020-10-29 | Unrefined titanium-added deformed steel making method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160208358A1 (en) * | 2013-09-26 | 2016-07-21 | Peking University Founder Group Co., Ltd. | Non quenched and tempered steel and manufacturing process thereof |
| CN107385342A (en) * | 2017-08-02 | 2017-11-24 | 首钢水城钢铁（集团）有限责任公司 | A kind of large-specification high-intensity steel rod and its manufacturing process |
| CN109972035A (en) * | 2019-03-28 | 2019-07-05 | 江苏省沙钢钢铁研究院有限公司 | A kind of 800MPa grades of hot-rolled ribbed bars and production method |
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2020
- 2020-10-29 CN CN202011183619.2A patent/CN112522569A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160208358A1 (en) * | 2013-09-26 | 2016-07-21 | Peking University Founder Group Co., Ltd. | Non quenched and tempered steel and manufacturing process thereof |
| CN107385342A (en) * | 2017-08-02 | 2017-11-24 | 首钢水城钢铁（集团）有限责任公司 | A kind of large-specification high-intensity steel rod and its manufacturing process |
| CN109972035A (en) * | 2019-03-28 | 2019-07-05 | 江苏省沙钢钢铁研究院有限公司 | A kind of 800MPa grades of hot-rolled ribbed bars and production method |
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Application publication date: 20210319 |
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