CN112746225A - High-carbon corrosion-wear-resistant cast lining plate steel for semi-automatic ball mill and preparation method and application thereof - Google Patents

High-carbon corrosion-wear-resistant cast lining plate steel for semi-automatic ball mill and preparation method and application thereof Download PDF

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CN112746225A
CN112746225A CN202011611695.9A CN202011611695A CN112746225A CN 112746225 A CN112746225 A CN 112746225A CN 202011611695 A CN202011611695 A CN 202011611695A CN 112746225 A CN112746225 A CN 112746225A
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resistant
ball mill
semi
automatic ball
steel
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CN112746225B (en
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陈湘茹
裴慧雯
戴龙龙
覃宋林
罗传越
马文高
张继彬
张峰
刘海宁
徐智帅
翟启杰
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University of Shanghai for Science and Technology
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University of Shanghai for Science and Technology
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/22—Lining for containers
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • 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
    • 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
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • 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
    • 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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium

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  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Food Science & Technology (AREA)
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Abstract

The invention provides high-carbon corrosion-resistant wear-resistant cast lining plate steel for a semi-automatic ball mill, and a preparation method and application thereof, and belongs to the technical field of lining plates of semi-automatic ball mills. The invention takes Cu, Cr and Ni elements with good corrosion resistance as main elements, and because the alloy elements are enriched in the rust layer, the invention promotes the formation of an amorphous rust layer, improves the structure of the rust layer, improves the compactness and the cohesiveness to the steel surface, and enhances the isolation effect with the atmosphere, thereby slowing down the corrosion rate and effectively improving the corrosion resistance of the steel; meanwhile, the Ti and Nb elements are added, the content of the Mo element is improved, the corrosion and wear resistance of the cast steel can be effectively improved, and the wear resistance of the cast steel is improved while the toughness is ensured. The results of the embodiment show that the high-carbon corrosion-abrasion-resistant semi-automatic ball mill lining plate provided by the invention has better wear resistance, high hardness, excellent toughness, impact corrosion resistance and high impact corrosion abrasion resistance.

Description

High-carbon corrosion-wear-resistant cast lining plate steel for semi-automatic ball mill and preparation method and application thereof
Technical Field
The invention relates to the technical field of lining plates of semi-automatic ball mills, in particular to high-carbon corrosion-resistant wear-resistant cast lining plate steel of a semi-automatic ball mill and a preparation method and application thereof.
Background
Cast steel is one kind of casting alloy, mainly composed of iron, carbon and other elements, and is specially used for manufacturing steel products of steel castings. The high-carbon cast steel is an iron-carbon alloy with the mass fraction of carbon in the steel being within the range of 0.60-1.70%, and the steel has high strength, wear resistance and fatigue limit after proper heat treatment. Wear is one of three main forms of failure of mechanical parts, a phenomenon commonly occurring in industry, agriculture and people's daily production and life. The wear-resistant material with the widest application range and the most consumption is a metal wear-resistant material which mainly comprises wear-resistant steel and wear-resistant cast iron. In addition, the corrosive wear belongs to failure caused by the simultaneous action of mechanical and corrosive electrochemical factors, and generally refers to a wear phenomenon that a friction surface in a corrosive medium and the medium generate chemical or electrochemical reaction to generate material loss. Since corrosive wear gradually becomes ineffective and is easily overlooked, studies on corrosive wear of cast steel have been conducted to date only in a limited amount.
The semi-automatic ball mill utilizes the steel balls to do throwing movement in the ball mill cylinder body, thereby the ore blocks in the cylinder body are abraded and impacted, the ore blocks are cracked into blocks, the blocks flow out through a lining plate on an end cover of a discharge port of the ball mill, and the lining plate is corroded to a certain extent by the impact of broken stones and corrosive slurry of mixed ores in the cylinder body, so that the lining plate of the semi-automatic ball mill is required to have excellent impact corrosion and abrasion resistance. However, the high carbon corrosion and abrasion resistant cast semi-automatic ball mill lining plate steel developed at present has the impact corrosion and abrasion resistance which does not reach the expected service life (6 months), and the lining plate needs more than 20 hours for maintenance and replacement once, so the cost is huge.
Disclosure of Invention
The invention aims to provide high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill lining plate steel, a preparation method and application thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel which comprises the following components in percentage by mass: 0.6 to 0.9% of C, 0.3 to 0.5% of Si, 0.8 to 1.3% of Mn, 0.1 to 0.5% of Ni, 0.2 to 0.3% of Cr, 0.2 to 0.5% of Mo, 0.1 to 0.3% of Cu, 0.01 to 0.06% of Ti, 0.02 to 0.08% of Nb, less than or equal to 0.05% of P, less than or equal to 0.02% of S, and the balance of Fe and inevitable impurities.
Preferably, the composition comprises the following components in percentage by mass: 0.6-0.8% of C, 0.35-0.45% of Si, 1.0-1.2% of Mn, 0.2-0.4% of Ni, 0.20-0.28% of Cr, 0.3-0.4% of Mo, 0.15-0.25% of Cu, 0.02-0.05% of Ti, 0.03-0.06% of Nb, less than or equal to 0.05% of P, less than or equal to 0.02% of S, and the balance of Fe and inevitable impurities.
The invention provides a preparation method of the high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel, which comprises the following steps:
according to the raw material proportion of the high-carbon corrosion-resistant wear-resistant casting semi-automatic ball mill liner plate steel, smelting and casting corresponding raw materials in sequence to obtain a casting;
and sequentially carrying out quenching treatment, first tempering treatment and second tempering treatment on the casting to obtain the high-carbon corrosion-resistant wear casting semi-automatic ball mill lining plate.
Preferably, the smelting process comprises the steps of desulphurization, dephosphorization, slagging, pre-deoxidation, alloying treatment and final deoxidation which are sequentially carried out.
Preferably, the casting temperature is 1480-1560 ℃.
Preferably, the quenching process comprises: performing first temperature rise to 700-760 ℃, preserving heat for 80-120 min, performing second temperature rise to 810-860 ℃, preserving heat for 120-160 min, and performing oil quenching to 50-100 ℃.
Preferably, the temperature rise rate of the first temperature rise is less than or equal to 60 ℃/h, and the temperature rise rate of the second temperature rise is less than or equal to 100 ℃/h.
Preferably, the temperature of the first tempering treatment is 600 ℃, and the heat preservation time is 60 min.
Preferably, the temperature of the second tempering treatment is 400 ℃, and the heat preservation time is 120 min.
The invention provides application of the high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill lining plate steel in the technical scheme or the high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill lining plate steel prepared by the preparation method in the technical scheme in preparation of a semi-automatic ball mill lining plate.
The invention providesThe high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel comprises the following components in percentage by mass: 0.6 to 0.9% of C, 0.3 to 0.5% of Si, 0.8 to 1.3% of Mn, 0.1 to 0.5% of Ni, 0.2 to 0.3% of Cr, 0.2 to 0.5% of Mo, 0.1 to 0.3% of Cu, 0.01 to 0.06% of Ti, 0.02 to 0.08% of Nb, less than or equal to 0.05% of P, less than or equal to 0.02% of S, and the balance of Fe and inevitable impurities. The invention takes Cu, Cr and Ni elements with good corrosion resistance as main elements, and because the alloy elements are enriched in the rust layer, the invention promotes the formation of an amorphous rust layer, improves the structure of the rust layer, improves the compactness and the cohesiveness to the steel surface, and enhances the isolation effect with the atmosphere, thereby slowing down the corrosion rate and effectively improving the corrosion resistance of the steel; meanwhile, the Ti and Nb elements are added, the content of the Mo element is improved, the corrosion and wear resistance of the cast steel can be effectively improved, and the wear resistance of the cast steel is improved while the toughness is ensured. The results of the examples show that the high-carbon corrosion-resistant wear-resistant semi-automatic ball mill lining plate provided by the invention not only has better wear resistance, but also has high hardness, excellent toughness, impact corrosion resistance and high impact corrosion wear resistance, wherein the hardness can reach 52.8HRC, and the impact toughness can reach 23.27J/cm2In the iron ore acidic ore pulp, the impact energy is 1.2J, the impact corrosion abrasion lasts for 12h, the impact frequency is 200 times/min, and the weight loss percentage of the impact corrosion abrasion is 0.038%.
The invention provides a preparation method of the high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel, after a casting obtained by smelting and casting is sequentially subjected to quenching and twice tempering treatment, the structure of the steel is lath martensite (namely dislocation martensite) which has higher toughness because the lath size of the dislocation martensite is small and is similar to very fine crystal grains, and the propagation of cracks can be prevented, so that the steel has excellent toughness, brittle fracture can be prevented, and the service life of the wear-resistant cast steel is prolonged; moreover, martensite has high hardness and high strength, and the hardness of martensite is increased along with the increase of the carbon content, so that the impact corrosion wear resistance of the steel is correspondingly improved. In addition, the preparation process does not add complicated procedures on the existing process, the process flow is simple and easy to operate, and the benefit can be improved.
Drawings
FIG. 1 is a microstructure of a high carbon corrosion and abrasion resistant semi-automatic ball mill liner plate steel of example 1 at a magnification of 10000 times;
FIG. 2 is a microstructure of a high carbon corrosion and abrasion resistant semi-automatic ball mill liner plate steel of example 1 at a magnification of 5000 times;
FIG. 3 is a graph showing the relationship between loss of abrasion loss and abrasion time of a liner plate of a semi-automatic ball mill made of the high-carbon corrosion-resistant abrasion semi-automatic ball mill liner plate steel of example 1 under an impact energy of 1.2J in an iron ore acidic slurry;
FIG. 4 is a microstructure of a high carbon corrosion and abrasion resistant semi-automatic ball mill liner plate steel of example 2 at a magnification of 10000 times;
FIG. 5 is a microstructure of a high carbon corrosion and abrasion resistant semi-automatic ball mill liner plate steel of example 2 at 5000 times magnification;
FIG. 6 is a graph showing the relationship between loss on abrasion loss and abrasion time of the liner plate of the semi-automatic ball mill made of the high carbon corrosion and abrasion resistant semi-automatic ball mill liner plate steel of example 2 under the impact energy of 1.5J in the iron ore acidic slurry.
Detailed Description
The invention provides high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel which comprises the following components in percentage by mass: 0.6 to 0.9% of C, 0.3 to 0.5% of Si, 0.8 to 1.3% of Mn, 0.1 to 0.5% of Ni, 0.2 to 0.3% of Cr, 0.2 to 0.5% of Mo, 0.1 to 0.3% of Cu, 0.01 to 0.06% of Ti, 0.02 to 0.08% of Nb, less than or equal to 0.05% of P, less than or equal to 0.02% of S, and the balance of Fe and inevitable impurities.
In the present invention, the required raw materials are all commercially available products well known to those skilled in the art, unless otherwise specified.
The high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel comprises, by mass, 0.6-0.9% of C, preferably 0.6-0.8% of C, and more preferably 0.7-0.75% of C. The added C element is used as a basic element of high-carbon steel, and the steel has excellent mechanical properties by controlling the carbon content.
The high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel comprises, by mass, 0.3-0.5% of Si, preferably 0.35-0.45%, and more preferably 0.38-0.42%. The addition of Si element is beneficial to strengthening ferrite and improving the strength of steel, and plays a role in deoxidation during steelmaking.
The high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel provided by the invention comprises 0.8-1.3% of Mn by mass percentage, and preferably 1.0-1.2% of Mn by mass percentage. The Mn element added in the invention plays a role in deoxidation and desulfurization during steel making, can eliminate hot brittleness caused by sulfur, and improves the hot processing property of steel.
The high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel comprises, by mass, 0.1-0.5% of Ni, preferably 0.2-0.4%, and more preferably 0.25-0.35%. The invention uses Ni element to make the corrosion potential of steel move forward, mainly uses NiFe2O4The corrosion and abrasion resistance of the steel is improved by promoting the transformation of spinel to a finer and compact structure, refining the crystal grains of the inner rust layer and increasing the compactness of the inner rust layer in the spinel oxide.
The high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel comprises, by mass, 0.2-0.3% of Cr, preferably 0.20-0.28%, and more preferably 0.24-0.25%. The invention utilizes Cr element in cooperation with Cu element to improve the passivation capability of steel.
The high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel provided by the invention comprises 0.2-0.5% of Mo, and preferably 0.30-0.40% of Mo. According to the invention, the content of Mo is controlled to be 0.3-0.5%, and the precipitation of a multi-component composite nano precipitated phase is facilitated, so that the effect of multi-component alloy composite reinforcement is achieved.
The high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel provided by the invention comprises 0.1-0.3% of Cu by mass percentage, and preferably 0.15-0.25%. The Cu element is used for delaying the anodic dissolution of Fe or reducing the electronic conductivity of the rust layer, so that the rate of electrons flowing to the cathode region is reduced, and the corrosion resistance of the steel is improved.
The high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel provided by the invention comprises 0.01-0.06% of Ti by mass percentage, and preferably 0.02-0.05%. The added Ti element has strong activity, is easy to form compounds with nonmetal elements such as the nonmetal element C, N, O and the like, and not only can improve the strength of cast steel, but also can improve the formability and weldability of steel.
The high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel comprises, by mass, 0.02-0.08% of Nb, and preferably 0.03-0.06%. The Nb element added in the invention can be dissolved in austenite in solid solution in the cast steel to play a role in inhibiting the recrystallization of deformed austenite and improving the recrystallization temperature of austenite, and the Nb element dissolved in austenite in solid solution also has the functions of reducing the transformation temperature of austenite ferrite and improving the hardenability.
The high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel provided by the invention comprises, by mass, not more than 0.05% of P and not more than 0.02% of S.
The high-carbon corrosion-resistant wear-resistant casting semi-automatic ball mill lining plate steel comprises the balance Fe and inevitable impurities in percentage by mass.
The high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel provided by the invention mainly comprises Cu, Cr and Ni elements, and because the alloy elements are enriched in the rust layer, the formation of an amorphous rust layer is promoted, the structure of the rust layer is improved, the compactness and the cohesiveness to the surface of the steel are improved, and the isolation effect with the atmosphere is enhanced, so that the corrosion rate is slowed down, and the corrosion resistance of the steel is effectively improved; meanwhile, the Ti and Nb elements are added, the content of the Mo element is improved, the corrosion and wear resistance of the cast steel can be effectively improved, and the wear resistance of the cast steel is improved while the toughness is ensured.
The invention provides a preparation method of the high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel, which comprises the following steps:
according to the raw material proportion of the high-carbon corrosion-resistant wear-resistant casting semi-automatic ball mill liner plate steel, smelting and casting corresponding raw materials in sequence to obtain a casting;
and sequentially carrying out quenching treatment, first tempering treatment and second tempering treatment on the casting to obtain the high-carbon corrosion-resistant wear casting semi-automatic ball mill lining plate.
According to the invention, the corresponding raw materials are sequentially smelted and cast according to the raw material proportion to obtain the casting. In the invention, the smelting process preferably comprises the steps of desulphurization, dephosphorization, slagging, pre-deoxidation, alloying treatment and final deoxidation which are sequentially carried out. In the present invention, the smelting is preferably carried out in a medium frequency induction smelting furnace. CaO-CaF is preferably used in the invention2Desulfurizing, dephosphorizing and slagging off; the specific process of the desulfurization, dephosphorization and slagging-off is not particularly limited and can be carried out according to the process well known in the field. In the present invention, the CaO-CaF2The addition amount of the bottom slag is preferably 0.8-1.5% by mass of the total casting amount. In the invention, the total casting amount is the total mass of the molten steel before casting.
According to the invention, pure aluminum wires are preferably used for pre-deoxidation, and the addition amount of the pure aluminum wires is preferably 0.7-0.9 kg/ton steel (namely high-carbon corrosion-resistant wear-resistant casting semi-automatic ball mill lining plate steel); the pre-deoxidation temperature is preferably 1530-1550 ℃, and more preferably 1535-1545 ℃; the time for the pre-deoxidation is not particularly limited in the present invention, and the pre-deoxidation may be carried out according to a process well known in the art.
In the present invention, the alloying treatment is preferably performed on the molten steel obtained by the preliminary deoxidation. In the invention, the temperature of the alloying treatment is preferably 1550-1560 ℃; the time for the alloying treatment is not particularly limited in the present invention, and may be carried out according to a procedure well known in the art.
The final deoxidation process is not particularly limited in the present invention, and may be carried out according to a process well known in the art.
In the invention, the casting process preferably includes the steps of heating the molten steel obtained by smelting to 1530-1600 ℃, transferring the molten steel into a ladle, and adjusting the temperature of the molten steel to the casting temperature for casting to obtain a casting. The temperature rise rate of the temperature rise is not particularly limited in the present invention, and the temperature rise to the casting temperature is carried out according to a process well known in the art. In the invention, the casting temperature is preferably 1480-1560 ℃, and more preferably 1500-1550 ℃; the casting time is not particularly limited in the present invention, and an ingot can be obtained according to a process well known in the art.
After the casting is obtained, the casting is sequentially subjected to quenching treatment, first tempering treatment and second tempering treatment to obtain the high-carbon corrosion-resistant wear-resistant casting semi-automatic ball mill lining plate. In the present invention, the quenching process preferably includes: performing first temperature rise to 700-760 ℃, preserving heat for 80-120 min, performing second temperature rise to 810-860 ℃, preserving heat for 120-160 min, and performing oil quenching to 50-100 ℃. In the present invention, the temperature increase rate of the first temperature increase is preferably not more than 60 ℃/h, and the temperature increase rate of the second temperature increase is preferably not more than 100 ℃/h. The process of oil quenching is not particularly limited in the present invention, and may be performed according to a process well known in the art. The invention forms the wear-resistant layer through quenching treatment, thereby improving the hardness and the wear resistance of the steel.
In the invention, the heating rate of the temperature raised to the temperature of the first tempering treatment is preferably less than or equal to 60 ℃/h; the temperature of the first tempering treatment is preferably 600 ℃, and the heat preservation time is preferably 60 min; after the first tempering treatment is completed, the casting is preferably air-cooled to room temperature and then subjected to the second tempering treatment.
In the invention, the heating rate of heating to the temperature of the second tempering treatment is preferably less than or equal to 60 ℃/h; the temperature of the second tempering treatment is preferably 400 ℃, and the heat preservation time is preferably 120 min. After the second tempering treatment is completed, the obtained casting is preferably air-cooled to room temperature, and the high-carbon corrosion-resistant wear-resistant casting semi-automatic ball mill lining plate is obtained after defect repair and quality detection are carried out. The process of defect repair and quality inspection is not particularly limited in the present invention, and may be performed according to a process well known in the art. According to the invention, through twice tempering treatment, on one hand, the brittleness can be reduced, and the internal stress can be eliminated or reduced; on the other hand, the mechanical properties required by the workpiece can be obtained, the workpiece has high hardness and large brittleness after quenching, and the toughness and plasticity of the wear-resistant steel can be improved through twice tempering treatment in order to improve the processing performance.
The invention provides application of the high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill lining plate steel in the technical scheme or the high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill lining plate steel prepared by the preparation method in the technical scheme in preparation of a semi-automatic ball mill lining plate. The method for applying the high-carbon corrosion-resistant wear-resistant casting semi-automatic ball mill lining steel is not particularly limited, and the high-carbon corrosion-resistant wear-resistant casting semi-automatic ball mill lining steel can be made into a semi-automatic ball mill lining steel according to a method well known in the field.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
Example 1
The high-carbon corrosion-resistant wear-resistant semi-automatic ball mill liner plate steel comprises the following chemical components in percentage by mass: 0.6% of C, 0.3% of Si, 0.9% of Mn, 0.1% of Ni, 0.2% of Cr, 0.25% of Mo, 0.1% of Cu, 0.01% of Ti, 0.02% of Nb, 0.05% of P, 0.02% of S, and the balance of Fe and inevitable impurities.
The preparation method of the high-carbon corrosion-resistant wear-resistant semi-automatic ball mill liner plate steel comprises the following steps:
(1) smelting and casting: accurately calculating the ingredients according to the components, placing the raw materials in a medium-frequency induction smelting furnace, and adopting CaO-CaF2(the mass percent of the added aluminum wire is 0.8 percent of the total casting amount) carrying out desulfurization dephosphorization and slagging-off, heating to 1530-1540 ℃, and carrying out pre-deoxidation for 2min by using a pure aluminum wire (the added amount of the aluminum wire is 0.7 kg/ton steel); continuously heating the molten steel, carrying out alloying treatment at 1550 ℃, and finally deoxidizing the obtained molten steel; transferring the obtained molten steel into a casting ladle when the temperature of the molten steel is increased to 1530-1550 ℃, and adjusting the temperature of the molten steel to 1480-1550 ℃ for casting to obtain a casting;
(2) quenching treatment: heating the casting to 700-740 ℃ at a heating rate of 60 ℃/h, preserving heat for 80-120 min, heating to 810-840 ℃ at a heating rate of less than or equal to 100 ℃/h, preserving heat for 120-160 min, and oil-quenching to 50-100 ℃;
(3) first tempering treatment: heating to 600 ℃ at a heating rate of 60 ℃/h, keeping the temperature of the casting obtained by quenching treatment for 60min, and then cooling to room temperature;
(4) second tempering treatment: and heating to 400 ℃ at a heating rate of 60 ℃/h, keeping the temperature of the casting subjected to the first tempering treatment for 120min, then air-cooling to room temperature, and performing defect repair and quality detection to obtain the high-carbon corrosion-resistant wear-resistant semi-automatic ball mill liner plate steel.
Performance testing
1) The high carbon corrosion and abrasion resistant semi-automatic ball mill liner plate steel of example 1 was subjected to microstructure test, and the results are shown in fig. 1 and 2. As can be seen from FIGS. 1 and 2, the high carbon corrosion and wear resistant semi-automatic ball mill liner plate steel prepared by the present invention has a pearlite structure with a small lamellar spacing of pearlite. The pearlite interlamellar spacing average was approximately 141.4nm as measured statistically using the software Image-Pro Plus.
2) And (3) impact corrosion wear performance detection: the test is carried out on an impact corrosion abrasion tester, the impact frequency of the tester is 200 times/min, the impact power is 1.2J, and the impact corrosion abrasion is 12 h. A layer of acidic iron ore slurry is arranged between impact surfaces, the acidic iron ore slurry is prepared by mixing a sulfuric acid aqueous solution with the pH of approximately 2.5 and iron ore (the particle size is 6-15 meshes) according to the volume ratio of 5:8, wherein the iron ore is hematite with the hardness of 550-650 HV, the slurry is updated once every half hour, the pH is controlled to be approximately 2.5, namely, corrosion and abrasive wear in the actual working condition of general corrosion and wear resistant cast steel are simulated, and the results are shown in Table 1.
Table 1 performance data for the high carbon erosion and wear resistant semi-automatic ball mill liner of example 1
Figure BDA0002874793360000081
Figure BDA0002874793360000091
As is apparent from Table 1, the high-carbon corrosion and abrasion resistant semi-automatic ball mill liner plate steel of example 1 had a hardness of 52.8HRC, an impact energy of 23.27J and a tensile strength of 1246 MPa.
3) After the high-carbon corrosion-resistant wear-resistant semi-automatic ball mill lining plate steel of the embodiment 1 is prepared into a semi-automatic ball mill lining plate, the lining plate is in service under actual working conditions, and the ore grinding amount per hour is detected, and the result is shown in figure 3. As can be seen from FIG. 3, in the iron ore acidic ore pulp, the impact work is 1.2J, the impact erosion wear is 12h, and the weight loss percentage of the impact erosion wear is 0.038%.
Example 2
The high-carbon corrosion-resistant wear-resistant semi-automatic ball mill lining plate comprises the following chemical components in percentage by mass: 0.9% of C, 0.5% of Si, 1.3% of Mn, 0.5% of Ni, 0.3% of Cr, 0.5% of Mo, 0.3% of Cu, 0.06% of Ti, 0.08% of Nb, 0.05% of P, 0.02% of S and the balance of Fe and inevitable impurities.
The preparation method of the high-carbon corrosion-resistant wear-resistant semi-automatic ball mill liner plate steel comprises the following steps:
(1) smelting and casting: accurately calculating the ingredients according to the components, placing the raw materials in a medium-frequency induction smelting furnace, and adopting CaO-CaF2(the mass percent of the added aluminum wire is 0.8 percent of the total casting amount) carrying out desulfurization dephosphorization and slagging-off, heating to 1530-1540 ℃, and carrying out pre-deoxidation for 2min by using a pure aluminum wire (the added amount of the aluminum wire is 0.7 kg/ton steel); continuously heating the molten steel, carrying out alloying treatment at 1550 ℃, and finally deoxidizing the obtained molten steel; transferring the obtained molten steel into a casting ladle when the temperature of the molten steel is increased to 1530-1550 ℃, and adjusting the temperature of the molten steel to 1480-1550 ℃ for casting to obtain a casting;
(2) quenching treatment: heating the casting to 700-740 ℃ at a heating rate of 60 ℃/h, preserving heat for 80-120 min, heating to 810-840 ℃ at a heating rate of less than or equal to 100 ℃/h, preserving heat for 120-160 min, and oil-quenching to 50-100 ℃;
(3) first tempering treatment: heating to 600 ℃ at a heating rate of 60 ℃/h, keeping the temperature of the casting obtained by quenching treatment for 60min, and then cooling to room temperature;
(4) second tempering treatment: and heating to 400 ℃ at a heating rate of 60 ℃/h, keeping the temperature of the casting subjected to the first tempering treatment for 120min, then air-cooling to room temperature, and performing defect repair and quality detection to obtain the high-carbon corrosion-resistant wear-resistant semi-automatic ball mill liner plate steel.
Performance testing
1) The high carbon corrosion and abrasion resistant semi-automatic ball mill liner plate steel of example 2 was subjected to microstructure test, and the results are shown in fig. 4 and 5. As can be seen from fig. 4 and 5, the product structure is pearlite, and the pearlite lamellar spacing is small, and the average value of the pearlite lamellar spacing is about 153.1 nm.
2) And (3) impact corrosion wear performance detection: the test is carried out on an impact corrosion abrasion tester, the impact frequency of the tester is 200 times/min, the impact power is 1.5J, and the impact corrosion abrasion is 12 h. A layer of acidic iron ore slurry is arranged between the impact surfaces, the acidic iron ore slurry is prepared by a sulfuric acid water solution with the pH value of approximately 2.5 and iron ore (the particle size is 6-15 meshes), wherein the iron ore is hematite with the hardness of 550-650 HV, the slurry is updated once every half hour, the pH value is controlled to be about 2.5, namely, the corrosion and abrasive wear in the actual working condition of general corrosion and wear resistant cast steel are simulated, and the results are shown in Table 2.
Table 2 performance data for the high carbon erosion and wear resistant semi-automatic ball mill liner of example 2
Figure BDA0002874793360000101
As shown in Table 2, the hardness of the high-carbon corrosion and abrasion resistant lining plate steel for the semiautomatic ball mill of example 1 can reach 54.2HRC, the impact energy can reach 22.78J, and the tensile strength is 1281 MPa.
3) After the high-carbon corrosion-resistant wear-resistant semi-automatic ball mill lining plate steel of the embodiment 2 is prepared into a semi-automatic ball mill lining plate, the lining plate is in service under actual working conditions, and the ore grinding amount per hour is detected, and the result is shown in fig. 6. As can be seen from FIG. 6, in the iron ore acidic ore pulp, the impact work is 1.5J, the impact erosion wear is 12h, and the weight loss percentage of the impact erosion wear is 0.041%.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel is characterized by comprising the following components in percentage by mass: 0.6 to 0.9% of C, 0.3 to 0.5% of Si, 0.8 to 1.3% of Mn, 0.1 to 0.5% of Ni, 0.2 to 0.3% of Cr, 0.2 to 0.5% of Mo, 0.1 to 0.3% of Cu, 0.01 to 0.06% of Ti, 0.02 to 0.08% of Nb, less than or equal to 0.05% of P, less than or equal to 0.02% of S, and the balance of Fe and inevitable impurities.
2. The high-carbon corrosion-resistant wear cast semi-automatic ball mill liner plate steel according to claim 1, which is characterized by comprising the following components in percentage by mass: 0.6-0.8% of C, 0.35-0.45% of Si, 1.0-1.2% of Mn, 0.2-0.4% of Ni, 0.20-0.28% of Cr, 0.3-0.4% of Mo, 0.15-0.25% of Cu, 0.02-0.05% of Ti, 0.03-0.06% of Nb, less than or equal to 0.05% of P, less than or equal to 0.02% of S, and the balance of Fe and inevitable impurities.
3. The method for preparing the high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill liner plate steel as claimed in claim 1 or 2, which is characterized by comprising the following steps:
according to the raw material proportion of the high-carbon corrosion-resistant wear-resistant casting semi-automatic ball mill liner plate steel, smelting and casting corresponding raw materials in sequence to obtain a casting;
and sequentially carrying out quenching treatment, first tempering treatment and second tempering treatment on the casting to obtain the high-carbon corrosion-resistant wear casting semi-automatic ball mill lining plate.
4. The preparation method according to claim 3, wherein the smelting process comprises the steps of desulphurization dephosphorization slagging, pre-deoxidation, alloying treatment and final deoxidation which are sequentially carried out.
5. The method according to claim 3, wherein the casting temperature is 1480-1560 ℃.
6. The production method according to claim 3, wherein the quenching treatment process includes: performing first temperature rise to 700-760 ℃, preserving heat for 80-120 min, performing second temperature rise to 810-860 ℃, preserving heat for 120-160 min, and performing oil quenching to 50-100 ℃.
7. The method according to claim 6, wherein the first temperature rise rate is 60 ℃/h or less, and the second temperature rise rate is 100 ℃/h or less.
8. The preparation method according to claim 3, wherein the temperature of the first tempering treatment is 600 ℃ and the holding time is 60 min.
9. The preparation method according to claim 3, wherein the temperature of the second tempering treatment is 400 ℃ and the holding time is 120 min.
10. Use of the high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill lining steel according to claim 1 or 2 or the high-carbon corrosion-resistant wear-resistant cast semi-automatic ball mill lining steel prepared by the preparation method according to any one of claims 3 to 9 in preparation of a lining plate of a semi-automatic ball mill.
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Publication number Priority date Publication date Assignee Title
JP2009242893A (en) * 2008-03-31 2009-10-22 Nsk Ltd Holder for rolling bearing and its surface treatment method
CN101818312A (en) * 2010-01-19 2010-09-01 钢铁研究总院 Corrosion resistant heavy rail steel with excellent strength-toughness, fatigue resistance and abrasive resistance
CN103305774A (en) * 2013-06-18 2013-09-18 张延� Manufacturing method of metal abrasion-proof anti-corrosion anti-rust pipeline
JP2015218361A (en) * 2014-05-16 2015-12-07 新日鐵住金株式会社 Medium or high carbon steel material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009242893A (en) * 2008-03-31 2009-10-22 Nsk Ltd Holder for rolling bearing and its surface treatment method
CN101818312A (en) * 2010-01-19 2010-09-01 钢铁研究总院 Corrosion resistant heavy rail steel with excellent strength-toughness, fatigue resistance and abrasive resistance
CN103305774A (en) * 2013-06-18 2013-09-18 张延� Manufacturing method of metal abrasion-proof anti-corrosion anti-rust pipeline
JP2015218361A (en) * 2014-05-16 2015-12-07 新日鐵住金株式会社 Medium or high carbon steel material

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