CN111349857A - Novel alloy material for manufacturing copper-sulfur ladle and slag ladle - Google Patents
Novel alloy material for manufacturing copper-sulfur ladle and slag ladle Download PDFInfo
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- CN111349857A CN111349857A CN202010271425.1A CN202010271425A CN111349857A CN 111349857 A CN111349857 A CN 111349857A CN 202010271425 A CN202010271425 A CN 202010271425A CN 111349857 A CN111349857 A CN 111349857A
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- sulfur
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/10—Slag pots; Slag cars
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- 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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a novel alloy material for manufacturing a copper-sulfur ladle and a slag ladle, which is characterized by comprising the following components in percentage by mass: 0.15 to 0.25 percent of C, 0.42 to 0.45 percent of Si, 0.5 to 1.0 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.030 percent of S, 0.6 to 0.8 percent of Cr, 0.2 to 0.6 percent of Mo, 0.2 to 0.6 percent of Re, 0.1 to 0.5 percent of V, and the balance of Fe. The alloy material prepared by the invention has good heat resistance, scouring resistance, thermal fatigue resistance and crack resistance, thereby prolonging the service life of the alloy material.
Description
Technical Field
The invention relates to the technical field of smelting, in particular to a novel alloy material for manufacturing a copper-sulfur ladle and a slag ladle.
Background
The copper-sulfur pack, also called as an ice-copper pack, has the most volume of 5m3 or 6m3, is used for containing crude copper liquid and ice-copper liquid discharged from a smelting furnace, the ice-copper is used as an intermediate product for copper smelting, the temperature is up to 1250 ℃, the use frequency is higher, the ice-copper has higher quality requirement on the ice-copper pack, the ice-copper pack has to be frequently replaced, and the service life of the ice-copper pack is short, and the energy consumption is high.
Both ferrous metallurgy enterprises and nonferrous metallurgy enterprises can generate a large amount of liquid slag (iron slag, steel slag, copper slag and the like), the temperature is up to over 1000 ℃, most enterprises load and process the slag by using a slag ladle (or called a slag pot), and the slag can be recycled or discarded after being cooled. But the casting process of the slag ladle can cause great harm to human bodies, simultaneously discharges a large amount of dust, waste gas, waste sand and the like, causes serious pollution to the surrounding environment, has energy consumption 4 times that of the mechanical industry in the casting industry, belongs to the high-pollution and high-energy-consumption industry, and does not accord with the industrial policy of national energy conservation, emission reduction and sustainable development.
At present, the copper-sulfur ladle and the slag ladle used in China mainly adopt ZG230-450 as main materials, but are limited by the performance and casting level of the materials, and the copper-sulfur ladle and the slag ladle have very short service life and are used for solving the problems of thermal fatigue, cracking, cracks and the like formed by thermal erosion.
Therefore, the development of a novel alloy material which can be used as a copper-sulfur ladle and a slag ladle and has long service life is a problem to be solved by the technical personnel in the field.
Disclosure of Invention
In view of the above, the present invention provides a novel alloy material for manufacturing copper-sulfur ladles and slag ladles with a prolonged service life, and aims to solve at least one of the above technical problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a novel alloy material for manufacturing copper-sulfur ladles and slag ladles comprises the following components in percentage by mass: 0.15 to 0.25 percent of C, 0.42 to 0.45 percent of Si, 0.5 to 1.0 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.030 percent of S, 0.6 to 0.8 percent of Cr, 0.2 to 0.6 percent of Mo, 0.2 to 0.6 percent of Re, 0.1 to 0.5 percent of V, and the balance of Fe.
Preferably, the alloy material comprises the following components: 0.20 percent of C, 0.42 percent of Si, 0.8 percent of Mn, less than or equal to 0.010 percent of P, less than or equal to 0.020 percent of S, 0.8 percent of Cr, 0.4 percent of Mo, 0.4 percent of Re, 0.2 percent of V and the balance of Fe.
The invention has the beneficial effects that:
the alloy material prepared by adopting the raw materials in percentage by mass has good heat resistance, scouring resistance, thermal fatigue resistance and crack resistance, so that the service life of the alloy material is prolonged. Wherein, the elements and the action and the application principle of the mass percent are as follows:
(1) carbon C is 0.15 to 0.25 percent
In the invention, C is a main element for ensuring the metal strength of the alloy material, but too high C content can increase the hardenability of the structure, increase the cold cracking tendency and reduce the impact toughness, and is not beneficial to the subsequent casting production; however, the C content is too low, which causes the alloy material to be too soft and the metal strength to be insufficient. The invention controls the content of C to be 0.4-0.5%, so that the alloy material has moderate hardness, strength and toughness, and finally can obtain an austenite structure with excellent mechanical property, thereby being suitable for the working environment of alloy materials.
(2) The silicon Si is 0.42 to 0.45 percent
In the invention, Si is a deoxidizer, has good deoxidizing effect and obvious solid solution strengthening effect, can obviously improve the fluidity of molten steel, but Si effectively improves the strength of alloy materials and simultaneously reduces the toughness, so the content of Si is not suitable to be too high. Therefore, the Si content in the alloy material is 0.42-0.45%.
(3) Manganese Mn is 0.5 to 1.0 percent
In the invention, Mn can improve the strength of the alloy material through solid solution strengthening, and can effectively reduce the S content in the alloy material and prevent the generation of hot cracks; mn can improve the tensile strength of the alloy material in the casting process, improve the plasticity and the toughness and simultaneously improve the crack resistance of the alloy material, but the Mn element content is too high, a Widmannstatten structure can be formed in the alloy material, and the toughness is also reduced. Therefore, the Mn content in the alloy material is 0.5-1.0%.
(4) Phosphorus P is less than or equal to 0.020 percent, and sulfur S is less than or equal to 0.030 percent
In the invention, P and S belong to harmful elements, wherein the increase of the content of P can increase the cracking tendency of the alloy material, and the content of P is controlled in a lower range to further improve the strength and the toughness of the alloy material in order to prevent hot cracking and cold cracking; an increase in the S content not only increases the tendency of the alloy material to crack thermally, but also increases the possibility of the alloy material developing pores. Therefore, the content of P in the alloy material is less than or equal to 0.020 percent, and the content of S in the alloy material is less than or equal to 0.030 percent.
(5) Chromium Cr is 0.6-0.8%
In the invention, Cr is one of effective elements for improving the metal strength of the alloy material, and can improve the heat strength of the alloy material; cr can also improve the content of acicular ferrite in the alloy material, reduce the content of proeutectoid ferrite, refine ferrite grains and increase hardenability, thereby improving the strength and toughness; although Cr has an effect of improving the high-temperature properties of steel, too high a content thereof increases the brittle transition temperature of steel, thereby lowering the workability thereof.
(6) The content of molybdenum Mo is 0.2 to 0.6 percent
In the invention, Mo can improve the strength and heat resistance of the steel, improve the creep resistance and hardenability of the steel without influencing the impact toughness, but the Mo content is too high to be beneficial to the toughness of the alloy material. Therefore, the Mo content in the alloy material is 0.2-0.6%.
(7) Rhenium Re is 0.2 to 0.6 percent
In the invention, the rare earth element Re with the content of 0.2-0.6% is beneficial to deoxidation and desulfurization of molten steel, purification of the molten steel, refinement of crystal grains and reduction of casting cracking tendency.
(8) The vanadium V is 0.1 to 0.5 percent
In the invention, the content of V can greatly increase the elasticity and strength of the alloy material, and the alloy material has the advantages of excellent abrasion resistance and anti-explosion property, high temperature resistance, more compact structure, higher toughness, elasticity and mechanical strength.
Further, the Si is selected from ferrosilicon.
The ferrosilicon is an iron-silicon alloy produced by smelting coke, steel scrap, and quartz (or silica) as raw materials in an electric furnace, and silicon and oxygen are easily converted into silicon dioxide, so the ferrosilicon is used as a deoxidizer in the present invention, and since a large amount of heat is released during the generation of silicon dioxide, it is advantageous for increasing the temperature of molten steel during deoxidation.
Further, the Mn is selected from ferromanganese.
A further advantage of the use of the above is that the ferromanganese can also be used as a deoxidizer in the present invention, and also has the effect of desulfurizing and reducing the harmful effects of sulfur.
Further, the Mo is selected from ferromolybdenum.
The adoption of the further beneficial effects is that the ferromolybdenum can enable the steel to have a uniform fine-grained structure, improve the hardenability of the steel and be beneficial to eliminating the temper brittleness.
Further, the alloy material also comprises 0.01-0.02% of microalloy.
Further, the microalloy is one of Ti and Nb or a mixture of both.
The further beneficial effects of the invention are that Ti and O, N have strong affinity, can effectively deoxidize and reduce free N in the alloy material, and the generated Ti nitride and Ti oxide have higher melting points, can be used as nucleation cores of acicular ferrite, and can hinder the growth of austenite grains and refine the grains; nb can refine grains, enhance the plasticity and toughness of the alloy material, form carbide with C, enhance the metal hardness and wear resistance of the alloy material, and influence the precipitation amount and precipitation time of chromium carbide.
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 following examples, the preparation method of the alloy material was:
the method comprises the steps of preparing alloy by using raw materials such as high-quality scrap steel, ferrosilicon, ferromanganese, ferromolybdenum, micro-chromium and the like in a single proportioning mode, adding the raw materials into an induction furnace for smelting, heating to about 1600 ℃, adding into a refining furnace, heating to about 1660 ℃ for refining for 25-30 min, testing molten steel components when molten steel is clear, proportioning according to target alloy components and adding corresponding alloy and scrap steel if the components are unreasonable, pouring in a manufactured sand mold when the molten steel components are combined and combined, cleaning, annealing, finishing and processing according to a diagram to obtain the qualified alloy material.
Example 1
The novel alloy material for manufacturing the copper-sulfur ladle and the slag ladle comprises the following components in percentage by mass: 0.15% of C, 0.42% of Si, 0.5% of Mn, 0.020% of P, 0.030% of S, 0.6% of Cr, 0.2% of Mo, 0.2% of Re, 0.1% of V and the balance of Fe.
Example 2
The novel alloy material for manufacturing the copper-sulfur ladle and the slag ladle comprises the following components in percentage by mass: 0.25% of C, 0.45% of Si, 1.0% of Mn, 0.020% of P, 0.030% of S, 0.8% of Cr, 0.6% of Mo, 0.6% of Re, 0.5% of V and the balance of Fe.
Example 3
The novel alloy material for manufacturing the copper-sulfur ladle and the slag ladle comprises the following components in percentage by mass: 0.20 percent of C, 0.42 percent of Si, 0.8 percent of Mn, less than or equal to 0.010 percent of P, less than or equal to 0.020 percent of S, 0.8 percent of Cr, 0.4 percent of Mo, 0.4 percent of Re, 0.2 percent of V, 0.02 percent of microalloy (wherein, 0.01 percent of Ti and 0.01 percent of Nb), and the balance of Fe.
Performance testing
The alloy materials prepared in the embodiments 1-3 are taken, ZG230-450 is taken as a comparative example (wherein, C is 0.2% -0.3%, Si is less than or equal to 0.50%, Mn is less than or equal to 0.90%, P is less than or equal to 0.040%, S is less than or equal to 0.040%), mechanical property tests are carried out according to the test standard of GB/T11352-2009, and the comparative results are shown in Table 1.
TABLE 1 comparison of the Performance of examples 1-3 with comparative examples
| Item | Service life (moon) | Yield strength (MPa) | Tensile Strength (MPa) | Impact absorption work (J) |
| Example 1 | 24 | 320 | 670 | 28 |
| Example 2 | 26 | 340 | 680 | 30 |
| Example 3 | 30 | 350 | 720 | 33 |
| Comparative example | 12 | 230 | 450 | 25 |
As can be seen from Table 1, the alloy materials prepared in the embodiments 1-3 of the invention have better performance than ZG230-450 in terms of service life, yield strength, tensile strength and impact absorption power.
The tests prove that the alloy material prepared by the invention has good heat resistance, scouring resistance, thermal fatigue resistance and crack resistance, thereby prolonging the service life of the alloy material.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The method is corresponding to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The novel alloy material for manufacturing the copper-sulfur ladle and the slag ladle is characterized by comprising the following components in percentage by mass: 0.15 to 0.25 percent of C, 0.42 to 0.45 percent of Si, 0.5 to 1.0 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.030 percent of S, 0.6 to 0.8 percent of Cr, 0.2 to 0.6 percent of Mo, 0.2 to 0.6 percent of Re, 0.1 to 0.5 percent of V, and the balance of Fe.
2. The novel alloy material for manufacturing the copper-sulfur ladle and the slag ladle as claimed in claim 1 is characterized in that the alloy material comprises the following components in percentage by mass: 0.20 percent of C, 0.42 percent of Si, 0.8 percent of Mn, less than or equal to 0.010 percent of P, less than or equal to 0.020 percent of S, 0.8 percent of Cr, 0.4 percent of Mo, 0.4 percent of Re, 0.2 percent of V and the balance of Fe.
3. The novel alloy material for manufacturing copper-sulfur ladles and slag ladles as claimed in claim 1 or 2, wherein said Si is selected from ferrosilicon.
4. The novel alloy material for manufacturing copper-sulfur ladles and slag ladles as claimed in claim 1 or 2, wherein Mn is selected from ferromanganese.
5. The novel alloy material for manufacturing copper-sulfur ladles and slag ladles as claimed in claim 1 or 2, wherein Mo is selected from ferromolybdenum.
6. The novel alloy material for manufacturing the copper-sulfur ladle and the slag ladle as claimed in claim 1 or 2, characterized by further comprising 0.01-0.02% of microalloy.
7. The novel alloy material for manufacturing the copper-sulfur ladle and the slag ladle as claimed in claim 6, wherein the micro-alloy is any one or a mixture of Ti and Nb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010271425.1A CN111349857A (en) | 2020-04-08 | 2020-04-08 | Novel alloy material for manufacturing copper-sulfur ladle and slag ladle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010271425.1A CN111349857A (en) | 2020-04-08 | 2020-04-08 | Novel alloy material for manufacturing copper-sulfur ladle and slag ladle |
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| JP2002327234A (en) * | 2001-04-26 | 2002-11-15 | Sumitomo Metal Ind Ltd | Round billet for seamless steel tube, and seamless steel tube |
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| EP2481826A1 (en) * | 2009-09-25 | 2012-08-01 | The Japan Steel Works, Ltd. | High-strength high-toughness cast steel material and manufacturing method therefor |
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2020
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Application publication date: 20200630 |