CN114231857A - Lining plate for large semi-autogenous mill and preparation method thereof - Google Patents
Lining plate for large semi-autogenous mill and preparation method thereof Download PDFInfo
- Publication number
- CN114231857A CN114231857A CN202111600289.7A CN202111600289A CN114231857A CN 114231857 A CN114231857 A CN 114231857A CN 202111600289 A CN202111600289 A CN 202111600289A CN 114231857 A CN114231857 A CN 114231857A
- Authority
- CN
- China
- Prior art keywords
- lining plate
- temperature
- less
- equal
- temperature rise
- Prior art date
- 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.)
- Withdrawn
Links
Images
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
- C22C38/18—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
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- 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
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- 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
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a lining plate for a large-scale semi-autogenous mill and a preparation method thereof, belonging to the technical field of metal casting manufacturing. The lining plate comprises the following components in percentage by weight: c: 0.60-0.80%, Cr: 1.80-2.20%, Mo: 0.30-0.60%, Si: 0.30-0.80%, Mn: 0.60 to 0.80%, Ni: 0.50-1.00%, V: 0.10 to 0.20%, Nb: 0.01-0.0.03%, Re: 0.005-0.015%, S: less than or equal to 0.025%, P: less than or equal to 0.025 percent, and the balance of Fe and inevitable impurities. Through the adjustment of the components and the proportion of the raw materials and the combination of a heat treatment method, the prepared lining plate has the characteristics of excellent wear resistance, good comprehensive mechanical property, simple preparation method and low production cost, and is suitable for large-scale industrial production.
Description
Technical Field
The invention relates to a lining plate for a large-scale semi-autogenous mill and a preparation method thereof, belonging to the technical field of metal casting manufacturing.
Background
The development of economy is not independent of the operation of mechanical equipment, at present, a semi-autogenous mill is commonly used in the fields of metallurgy, mines and the like, a mill lining plate is a key part of the mill which is used for protecting a mill cylinder body, preventing the cylinder body from being directly impacted and rubbed by a grinding body and materials, simultaneously lifting the materials and the grinding body, and enabling the grinding body to have a certain motion shape in the mill so as to enhance the crushing and grinding effects of the grinding body on the materials. The lining plate of the mill can be strongly impacted, abraded and even corroded in the service process, and certain influence is generated on the service life and the working efficiency of the lining plate.
The lining plate material widely used at present is a high manganese steel series, the yield strength is low, the lining plate is easy to deform in the using process, the lining plate is often broken, and the lining plate is easy to deform in the using process, so that the maintenance and the disassembly are difficult; although the wear-resistant cast iron series has higher hardness, the wear-resistant cast iron series has high brittleness and is easy to break because the wear-resistant cast iron series is not suitable for working conditions with strong impact force. With the development of industry, the sizes of various mills are changed from small to large, and the requirements on the performance of the lining plate are more and more strict, so that a novel lining plate material with excellent performance is required to be provided, so as to achieve the purposes of improving the grinding efficiency of the mill, increasing the yield, reducing metal abrasion and prolonging the service life.
Disclosure of Invention
In order to solve the technical problems, the invention provides the lining plate for the large-scale semi-autogenous mill and the preparation method thereof.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a lining plate for a large-scale semi-autogenous mill, which comprises the following components in percentage by weight: c: 0.60-0.80%, Cr: 1.80-2.20%, Mo: 0.30-0.60%, Si: 0.30-0.80%, Mn: 0.60 to 0.80%, Ni: 0.50-1.00%, V: 0.10 to 0.20%, Nb: 0.01-0.0.03%, Re: 0.005-0.015%, S: less than or equal to 0.025%, P: less than or equal to 0.025 percent, and the balance of Fe and inevitable impurities.
Furthermore, the weight of the lining plate is more than 2500kg, the hardness is more than or equal to 380HBW, the impact energy is more than or equal to 40J, the tensile strength is more than 1300MPa, the yield strength is more than 1000MPa, the elongation at break is more than 7%, and the reduction of area is more than 12%.
The invention also provides a preparation method of the lining plate for the large-scale semi-autogenous mill, which comprises the following steps:
(1) smelting: mixing and smelting raw material alloys according to a weight ratio to obtain molten steel, and casting and molding the molten steel to obtain a lining plate casting;
(2) and (3) heat treatment: and (2) sequentially carrying out normalizing treatment and tempering treatment on the lining plate casting obtained in the step (1) to obtain the lining plate for the large-scale semi-autogenous mill.
Further, all the components in the step (1) are subjected to baking treatment before smelting.
Further, the smelting temperature in the step (1) is more than or equal to 1600 ℃.
Further, aluminum wires are fed in the smelting process in the step (1) for deoxidation pretreatment and final deoxidation, and rare earth alloy and calcium silicon alloy are adopted for inoculation modification treatment during tapping. The external refining technology is adopted to lead the inclusion to float upwards and ensure the purity of the molten steel.
Further, the normalizing treatment in the step (2) specifically includes: heating the lining plate blank obtained in the step (1) from 250-300 ℃ to 640-660 ℃ for the first time, keeping the temperature for 2 hours, then continuing heating to 920-940 ℃ for keeping the temperature for 6 hours for the second time, and then cooling the lining plate blank to 200-250 ℃ by air.
Furthermore, the temperature rising speed of the first temperature rising in the normalizing treatment is less than or equal to 80 ℃/h, and the temperature rising speed of the second temperature rising is less than or equal to 80 ℃/h.
Further, the tempering treatment in the step (2) specifically includes: heating the lining plate blank subjected to normalizing to 340-360 ℃ for the first time, keeping the temperature for 2 hours, continuing heating to 600-640 ℃ for the second time, keeping the temperature for 10 hours, and then cooling the lining plate blank to be less than or equal to 50 ℃ by air.
Furthermore, the temperature rising speed of the first temperature rise in the tempering treatment is less than or equal to 50 ℃/h, and the temperature rising speed of the second temperature rise is less than or equal to 50 ℃/h.
The invention discloses the following technical effects:
1) the carbon content of the lining plate is reduced, but the use amounts of Cr, Ni, Mo, Si and the like are increased, so that the strength, hardness and wear resistance of the lining plate are enhanced, the toughness of an alloying lining plate material is improved, and meanwhile, the effect of refining crystal grains is achieved, the tempering stability of the lining plate is improved while the microstructure is further refined by adding V, Nb elements, the coarsening of carbides is inhibited, the dispersion strengthening effect is enhanced, the lining plate has good toughness, S and P are used as harmful elements, the content of S and P is reduced to the minimum, and the safety is higher.
2) The thickness of the lining plate reaches 240mm, the weight of the unit area is more than 2500kg, so that the wear rate in the use process is reduced, the wear resistance of the prepared lining plate is excellent by adjusting the components and the proportion of raw materials and combining a heat treatment process method, the comprehensive mechanical property is good, the hardness of the prepared lining plate reaches 380HBW, the impact energy reaches 40J, the tensile strength reaches 1300MPa, the yield strength reaches 1000MPa, the elongation at break reaches 7%, and the reduction of area reaches 12%.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a process diagram of normalizing a liner plate;
FIG. 2 is a drawing of the tempering process of the liner plate;
FIG. 3 is a metallographic structure of a backing plate prepared in example 1;
FIG. 4 is a metallographic structure diagram of a backing plate prepared in example 2.
Detailed Description
Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Further, for numerical ranges in this disclosure, it is understood that each intervening value, between the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in a stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference herein for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The description and examples are intended to be illustrative only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
The alloy blocks of ferrochrome, ferromolybdenum, ferrosilicon, ferromanganese and scrap steel used in the embodiment of the invention have moderate sizes, are baked in batches, the scrap steel is added during smelting, the alloy elements of ferrochrome, ferromolybdenum, ferrosilicon, ferromanganese and the like are added in the middle and later stages of smelting, the components of molten steel are adjusted to the expected components, and the specific components are C: 0.60-0.80%, Cr: 1.80-2.20%, Mo: 0.30-0.60%, Si: 0.30-0.80%, Mn: 0.60 to 0.80%, Ni: 0.50-1.00%, V: 0.10 to 0.20%, Nb: 0.01-0.0.03%, Re: 0.005-0.015%, S: less than or equal to 0.025%, P: less than or equal to 0.025 percent, and the balance of Fe and inevitable impurities.
The alloy blocks in the following examples were all subjected to baking treatment before melting.
The normalizing treatment process of the embodiment of the invention is shown in figure 1, and the tempering treatment process is shown in figure 2.
The technical solution of the present invention is further illustrated by the following examples.
Example 1
(1) Smelting: sequentially adding alloy blocks into an intermediate frequency furnace, adjusting the components of molten steel to expected components, feeding aluminum wires for deoxidation pretreatment when heating to 1550-1580 ℃, feeding aluminum wires for final deoxidation when heating to 1600-1650 ℃, discharging at 1600 ℃, adding rare earth alloy and calcium silicon alloy which are 0.1-0.5% of the total mass of the molten steel for inoculation and modification treatment when discharging, floating inclusions by adopting an external refining technology to obtain pure molten steel, and pouring and molding the molten steel to obtain a lining plate casting;
(2) thermal treatment
Normalizing treatment: preheating a heating furnace to 250-300 ℃, then placing the lining plate casting obtained in the step (1), heating to 640-660 ℃ at a speed of 60-80 ℃/h, keeping the temperature for 2h, then continuing heating to 920-940 ℃ at a speed of 30-50 ℃/h, keeping the temperature for 6h, then taking out the lining plate from the heating furnace, and cooling the air to 200-250 ℃;
tempering treatment: preheating a heating furnace to 250-300 ℃, then placing the lining plate after normalizing treatment, heating to 340-360 ℃ at a speed of 30-50 ℃/h, keeping the temperature for 2h, then continuing heating to 600-640 ℃ at a speed of 30-50 ℃/h, keeping the temperature for 10h, then taking the lining plate out of the heating furnace, and cooling the air to room temperature to obtain the lining plate for the large-scale semi-autogenous mill.
The prepared lining plate comprises the following components in percentage by weight: c: 0.60-0.80%, Cr: 1.80-2.20%, Mo: 0.30-0.60%, Si: 0.30-0.80%, Mn: 0.60 to 0.80%, Ni: 0.50-1.00%, V: 0.10 to 0.20%, Nb: 0.01-0.0.03%, Re: 0.005-0.015%, S: less than or equal to 0.025%, P: less than or equal to 0.025 percent, and the balance of Fe and inevitable impurities.
The thickness of the prepared lining plate is 241mm, the weight per unit area is 2533kg, the hardness is measured by adopting an HSB-150 electric Brinell hardness tester, a pressure head selects a 5mm hard alloy ball, the loading force is kgf, the hardness is measured by 380HBW after 20s of load retention time, an impact sample adopts a standard unnotched impact sample, unnotched impact energy is 44J, a tensile sample is a round rod-shaped standard sample, and the tensile strength reaches 1315 MPa.
The metallographic structure diagram of the lining plate for the large-scale semi-autogenous mill prepared in the embodiment is shown in fig. 3, and the structure can be seen from fig. 3 to be tempered sorbite, tempered martensite and carbide.
Example 2
(1) Smelting: sequentially adding alloy blocks into an intermediate frequency furnace, adjusting the components of molten steel to expected components, feeding aluminum wires for deoxidation pretreatment when heating to 1550-1580 ℃, feeding aluminum wires for final deoxidation when heating to 1600-1650 ℃, discharging at 1600 ℃, adding rare earth alloy and calcium silicon alloy which are 0.1-0.5% of the total mass of the molten steel for inoculation and modification treatment when discharging, floating inclusions by adopting an external refining technology to obtain pure molten steel, and pouring and molding the molten steel to obtain a lining plate casting;
(2) thermal treatment
Normalizing treatment: preheating a heating furnace to 250-300 ℃, then placing the lining plate casting obtained in the step (1), heating to 640-660 ℃ at a speed of 60-80 ℃/h, keeping the temperature for 2h, then continuing heating to 920-940 ℃ at a speed of 30-50 ℃/h, keeping the temperature for 6h, then taking out the lining plate from the heating furnace, and cooling the air to 200-250 ℃;
tempering treatment: preheating a heating furnace to 250-300 ℃, then placing the lining plate after normalizing treatment, heating to 340-360 ℃ at a speed of 30-50 ℃/h, keeping the temperature for 2h, then continuing heating to 600-640 ℃ at a speed of 30-50 ℃/h, keeping the temperature for 10h, then taking the lining plate out of the heating furnace, and cooling the air to room temperature to obtain the lining plate for the large-scale semi-autogenous mill.
The prepared lining plate comprises the following components in percentage by weight: c: 0.60-0.80%, Cr: 1.80-2.20%, Mo: 0.30-0.60%, Si: 0.30-0.80%, Mn: 0.60 to 0.80%, Ni: 0.50-1.00%, V: 0.10 to 0.20%, Nb: 0.01-0.0.03%, Re: 0.005-0.015%, S: less than or equal to 0.025%, P: less than or equal to 0.025 percent, and the balance of Fe and inevitable impurities.
The thickness of the prepared lining plate is 246mm, the weight of the unit area is 2612kg, the hardness is 393HBW, the unnotched impact energy is 62J, and the tensile strength reaches 1462 MPa.
The metallographic structure diagram of the lining plate for the large-scale semi-autogenous mill prepared in the embodiment is shown in fig. 4, and the structure can be seen from fig. 4 to be tempered sorbite, tempered martensite and carbide.
Example 3
(1) Smelting: sequentially adding alloy blocks into an intermediate frequency furnace, adjusting the components of molten steel to expected components, feeding aluminum wires for deoxidation pretreatment when heating to 1550-1580 ℃, feeding aluminum wires for final deoxidation when heating to 1600-1650 ℃, discharging at 1600 ℃, adding rare earth alloy and calcium silicon alloy which are 0.1-0.5% of the total mass of the molten steel for inoculation and modification treatment when discharging, floating inclusions by adopting an external refining technology to obtain pure molten steel, and pouring and molding the molten steel to obtain a lining plate casting;
(2) thermal treatment
Normalizing treatment: preheating a heating furnace to 250-300 ℃, then placing the lining plate casting obtained in the step (1), heating to 640-660 ℃ at a speed of 60-80 ℃/h, keeping the temperature for 2h, then continuing heating to 920-940 ℃ at a speed of 30-50 ℃/h, keeping the temperature for 6h, then taking out the lining plate from the heating furnace, and cooling the air to 200-250 ℃;
tempering treatment: preheating a heating furnace to 250-300 ℃, then placing the lining plate after normalizing treatment, heating to 340-360 ℃ at a speed of 30-50 ℃/h, keeping the temperature for 2h, then continuing heating to 600-640 ℃ at a speed of 30-50 ℃/h, keeping the temperature for 10h, then taking the lining plate out of the heating furnace, and cooling the air to room temperature to obtain the lining plate for the large-scale semi-autogenous mill.
The prepared lining plate comprises the following components in percentage by weight: c: 0.60-0.80%, Cr: 1.80-2.20%, Mo: 0.30-0.60%, Si: 0.30-0.80%, Mn: 0.60 to 0.80%, Ni: 0.50-1.00%, V: 0.10 to 0.20%, Nb: 0.01-0.0.03%, Re: 0.005-0.015%, S: less than or equal to 0.025%, P: less than or equal to 0.025 percent, and the balance of Fe and inevitable impurities.
The thickness of the prepared lining plate is 243mm, the weight per unit area is 2576kg, the hardness is 388HBW, the unnotched impact energy is 57J, and the tensile strength reaches 1381 MPa.
Comparative example 1
The only difference from example 1 is that the liners were free of V and Nb components without the addition of V, Nb containing alloy ingots. The thickness of the prepared lining plate is 244mm, the weight per unit area is 2583kg, the hardness is 345HBW, the unnotched impact energy is 28J, and the tensile strength reaches 1046 MPa.
Comparative example 2
The difference from example 1 is only that the tempering treatment of step (2) is not performed. The thickness of the prepared lining plate is 240mm, the weight per unit area is 2535kg, the hardness is 420HBW, the unnotched impact energy is 14J, and the tensile strength reaches 1150 MPa.
Comparative example 3
The difference from example 1 is only that the normalizing treatment in step (2) is specifically: preheating a heating furnace to 250 ℃, then putting the lining plate blank obtained in the step (1), heating to 850 ℃ at a speed of 90 ℃/h, keeping the temperature for 2h, then continuously heating to 940 ℃ at a speed of 80 ℃/h, keeping the temperature for 9h, then taking the lining plate out of the heating furnace, and cooling the air to 200 ℃. The prepared lining plate has the thickness of 242mm, the weight per unit area of 2560kg, the hardness of 335HBW, the unnotched impact energy of 35J and the tensile strength of 1038 MPa.
Comparative example 4
The difference from the example 1 is that the lining board for the large-scale semi-autogenous mill can be obtained by preheating the heating furnace to 300 ℃, then placing the lining board after normalizing treatment, heating to 500 ℃ at the speed of 50 ℃/h, keeping the temperature for 4h, then continuing heating to 640 ℃ at the speed of 50 ℃/h, keeping the temperature for 8h, then taking the lining board out of the heating furnace, and cooling the air to 250 ℃. The thickness of the prepared lining plate is 248mm, the weight of the unit area is 2605kg, the hardness is 324HBW, the unnotched impact energy is 43J, and the tensile strength reaches 1065 MPa.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (8)
1. The lining plate for the large-scale semi-autogenous mill is characterized by comprising the following components in percentage by weight: c: 0.60-0.80%, Cr: 1.80-2.20%, Mo: 0.30-0.60%, Si: 0.30-0.80%, Mn: 0.60 to 0.80%, Ni: 0.50-1.00%, V: 0.10 to 0.20%, Nb: 0.01-0.0.03%, Re: 0.005-0.015%, S: less than or equal to 0.025%, P: less than or equal to 0.025 percent, and the balance of Fe and inevitable impurities.
2. The liner plate for a large-scale semi-autogenous mill according to claim 1, wherein the weight of the single piece of the liner plate is more than 2500kg, the hardness is more than or equal to 380HBW, the impact energy is more than or equal to 40J, the tensile strength is more than 1300MPa, the yield strength is more than 1000MPa, the elongation at break is more than 7%, and the reduction of area is more than 12%.
3. The preparation method of the lining plate for the large-scale semi-autogenous mill according to any one of claims 1 to 2, characterized by comprising the following steps:
(1) smelting: mixing and feeding raw material alloys according to a weight ratio, smelting to obtain pure molten steel, and casting and molding the molten steel to obtain a lining plate blank;
(2) and (3) heat treatment: and (2) sequentially carrying out normalizing treatment and tempering treatment on the lining plate casting obtained in the step (1) to obtain the lining plate for the large-scale semi-autogenous mill.
4. The production method according to claim 3, wherein the temperature of the melting in the step (1) is 1600 ℃ or more.
5. The production method according to claim 3, wherein the normalizing treatment in the step (2) specifically includes: heating the lining plate casting obtained in the step (1) from 250-300 ℃ to 640-660 ℃ for the first time, keeping the temperature for 2 hours, then continuing heating to 920-940 ℃ for keeping the temperature for 6 hours for the second time, and then cooling the lining plate casting to 200-250 ℃ by air.
6. The method according to claim 5, wherein the first temperature rise is performed at a temperature rise rate of 80 ℃/h or less, and the second temperature rise is performed at a temperature rise rate of 50 ℃/h or less.
7. The preparation method according to claim 3, wherein the tempering treatment in the step (2) specifically comprises: and (3) heating the lining plate casting subjected to normalizing to 340-360 ℃ for the first time, keeping the temperature for 2 hours, continuing heating to 600-640 ℃ for the second time, keeping the temperature for 10 hours, and then cooling in the air to be less than or equal to 50 ℃.
8. The method according to claim 7, wherein the first temperature rise is performed at a temperature rise rate of 50 ℃/h or less, and the second temperature rise is performed at a temperature rise rate of 50 ℃/h or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111600289.7A CN114231857A (en) | 2021-12-24 | 2021-12-24 | Lining plate for large semi-autogenous mill and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111600289.7A CN114231857A (en) | 2021-12-24 | 2021-12-24 | Lining plate for large semi-autogenous mill and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114231857A true CN114231857A (en) | 2022-03-25 |
Family
ID=80762665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111600289.7A Withdrawn CN114231857A (en) | 2021-12-24 | 2021-12-24 | Lining plate for large semi-autogenous mill and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114231857A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115029616A (en) * | 2022-08-11 | 2022-09-09 | 垣曲县晋锋机械铸造有限公司 | Heat-resistant, wear-resistant and corrosion-resistant iron casting |
-
2021
- 2021-12-24 CN CN202111600289.7A patent/CN114231857A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115029616A (en) * | 2022-08-11 | 2022-09-09 | 垣曲县晋锋机械铸造有限公司 | Heat-resistant, wear-resistant and corrosion-resistant iron casting |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106661705B (en) | carburized alloy steel and preparation method and application thereof | |
| CN108950432B (en) | Manufacturing method of high-strength and high-toughness low-alloy wear-resistant steel | |
| CN112593157B (en) | High-toughness bainite wear-resistant cast steel and preparation method and application thereof | |
| CN101956140B (en) | Lining plate for large ball mill and casting method thereof | |
| CN105154764A (en) | Light-weight high manganese steel lining plate for crusher and preparation method of light-weight high manganese steel lining plate | |
| CN102703817A (en) | Free-machining pinion steel and production technique thereof | |
| CN103898415A (en) | Improved Cr8 steel roll and preparation method thereof | |
| CN114411043B (en) | Preparation method of large hot forging hot work die steel | |
| CN109735770B (en) | Graphite-containing high-strength high-toughness bainite wear-resistant steel and preparation method thereof | |
| CN109295382B (en) | High-nitrogen wear-resistant corrosion-resistant alloy and preparation method thereof | |
| CN113046641B (en) | Low-vanadium nitrogen-containing hot work die steel and preparation method thereof | |
| CN112143970B (en) | High-strength high-toughness non-quenched and tempered front axle steel and production method thereof | |
| CN113088812A (en) | High-strength-toughness ultralow-temperature impact-resistant tubing head forging blank and manufacturing method thereof | |
| CN103789600A (en) | Hypereutectic high-chromium iron preparation method | |
| CN113897541B (en) | High-chromium wear-resistant steel ball and casting process thereof | |
| CN111534763A (en) | Wear-resistant alloy steel and preparation method thereof | |
| CN111378909A (en) | High-toughness high manganese steel lining plate and production process thereof | |
| CN1624180A (en) | High boron foundry iron base anti-wear alloy and its heat treatment method | |
| CN114231857A (en) | Lining plate for large semi-autogenous mill and preparation method thereof | |
| CN112680661B (en) | Alloy steel and preparation method thereof | |
| CN114635094B (en) | Martensitic stainless steel for valve body and preparation method thereof | |
| CN113462989A (en) | Niobium microalloyed high manganese steel lining plate for mine lattice type ball mill and preparation method thereof | |
| CN104651731B (en) | A kind of large-size ball mill liner plate and preparation method thereof | |
| CN114250418A (en) | Chromium-molybdenum steel lining plate lifting strip embedded hard alloy for semi-autogenous mill with diameter of 12.2m and casting method thereof | |
| CN113604748B (en) | Thick-specification weather-resistant corrosion-resistant Cr alloy steel plate and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220325 |
|
| WW01 | Invention patent application withdrawn after publication |