CN115161537A - High-wear-resistance cast iron roller and manufacturing method thereof - Google Patents

High-wear-resistance cast iron roller and manufacturing method thereof Download PDF

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CN115161537A
CN115161537A CN202210778456.5A CN202210778456A CN115161537A CN 115161537 A CN115161537 A CN 115161537A CN 202210778456 A CN202210778456 A CN 202210778456A CN 115161537 A CN115161537 A CN 115161537A
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roller
cast iron
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CN115161537B (en
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杜旭景
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Sinosteel Xingtai Machinery and Mill Roll Co Ltd
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Sinosteel Xingtai Machinery and Mill Roll Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/10—Cast-iron alloys containing aluminium or silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
    • 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/08—Manufacture of cast-iron
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D1/30—Stress-relieving
    • 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
    • C21D5/00—Heat treatments of cast-iron
    • 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
    • C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/08—Making cast-iron alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/06—Cast-iron alloys containing chromium
    • C22C37/08—Cast-iron alloys containing chromium with nickel
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/004—Dispersions; Precipitations
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Mechanical Engineering (AREA)
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  • Metallurgy (AREA)
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  • Crystallography & Structural Chemistry (AREA)
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Abstract

The invention discloses a high-wear-resistance cast iron roller and a manufacturing method thereof, wherein the roller comprises a roller neck and a roller body, the roller body comprises a working layer and a core part, and the working layer comprises the following chemical components in percentage by weight: c:2.5-3.0%, si:0.50 to 0.90%, mn:1.00 to 1.50 percent of the total weight of the composition, and less than or equal to 0.03 percent of P; s is less than or equal to 0.03%, cr:22 to 29%, ni:0.50 to 1.00%, mo: 0.30-0.60%, V + Nb is more than or equal to 0.2% and less than or equal to 0.5%, B:0.2-0.5%, and the balance of Fe and inevitable impurities. The manufacturing method comprises smelting, centrifugal casting of the outer layer, core filling, preliminary heat treatment and final heat treatment, effectively solves the problem of poor wear resistance of the conventional high-nickel-chromium roller when used in the post-finishing section of the hot rolled plate strip, and meets the requirements of short-process endless rolling and rolling of rolled material varieties such as stainless steel, silicon steel, high-strength plates and the like.

Description

High-wear-resistance cast iron roller and manufacturing method thereof
Technical Field
The invention belongs to the technical field of machining and casting, and particularly relates to a high-wear-resistance cast iron roller and a manufacturing method thereof.
Background
With the development of short-process full endless rolling technology and the increasing variety of rolled materials of stainless steel, silicon steel and high-strength plates, the wear resistance of the Gao Niege roller at the post-stage of hot continuous rolling finish rolling is more and more difficult to adapt to the rolling requirement. However, the high-nickel-chromium roller is a conventional material of a finish rolling rear section, the structure of the high-nickel-chromium roller is graphite, bainite and carbide, wherein the carbide is a main wear-resistant phase, the content of the carbide is about 30%, the roller surface is flat when the roller is used by a higher carbide content, the requirement of the high surface of the finish rolling rear section is met, but the graphite and the bainite are soft phases, the wear resistance is reduced, which is a main problem that the wear resistance of the high-nickel-chromium roller is insufficient, in order to improve the problem, a high-speed steel material is adopted, but the carbide content of the high-speed steel material is generally not more than 15%, the carbide content of the high-nickel-chromium steel material is greatly different from that of the high-nickel-chromium, the stress of the high-speed steel roller is higher, and the toughness is poorer; the content of carbide of the conventional high-chromium cast iron material is basically below 20 percent, and the high-chromium cast iron material is difficult to reach the level of the high-chromium cast iron material, so the high-chromium cast iron material is difficult to use in the post-finishing stage.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a high-wear-resistance cast iron roller and a manufacturing method thereof, which are suitable for the post-finishing section of a hot-rolled plate strip rolling line, effectively solve the problem of poor wear resistance of the conventional high-nickel-chromium roller when used in the post-finishing section of the hot-rolled plate strip rolling line, and meet the requirements of short-process endless rolling and rolling of rolled material varieties such as stainless steel, silicon steel, high-strength plates and the like.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the high-wear-resistance cast iron roller comprises a roller neck and a roller body, wherein the roller body comprises a working layer and a core part, and the working layer comprises the following chemical components in percentage by weight: c:2.5-3.0%, si:0.50 to 0.90%, mn:1.00 to 1.50 percent of the total weight of the catalyst, and less than or equal to 0.03 percent of P; s is less than or equal to 0.03%, cr:22 to 29%, ni:0.50 to 1.00%, mo: 0.30-0.60%, V + Nb is more than or equal to 0.2% and less than or equal to 0.5%, B:0.2-0.5%, and the balance of Fe and inevitable impurities.
The technical scheme of the invention is further improved as follows: the weight percentage content ratio of Cr to C is more than or equal to 9.
The technical scheme of the invention is further improved as follows: the V, nb and B multi-component alloy is subjected to microalloying treatment, and any one or both of V, nb are added into the chemical components of the working layer.
The technical scheme of the invention is further improved as follows: a manufacturing method of a high-wear-resistance cast iron roller comprises the following steps:
step S1, smelting: smelting scrap steel and alloy serving as raw materials in an induction furnace according to chemical components of a working layer of the roller body, wherein the smelting temperature is 1430-1530 ℃; carrying out V, nb and B microalloy treatment in a furnace, wherein the microalloy Nb is added when smelting is started, and the microalloy V, B is added before discharging;
s2, centrifugally casting a roll body working layer and a core filling: the roll body working layer is poured in a centrifugal mode, when the solidification temperature of the roll body working layer reaches a solidus, the core part and the roll neck are poured through core filling, and then the casting is opened after the temperature is controlled and cooled to room temperature in the casting mold;
step S3, preheating: opening the casting, then performing stress relief annealing at the annealing temperature of 450-800 ℃ for 24-48 hours, and cooling along with the furnace after the heat preservation is finished;
step S4, final heat treatment: carrying out heat treatment on the surface of the roller by adopting a differential quenching method, wherein the quenching temperature is 900-1050 ℃, the quenching heat preservation time is 1-5 hours, and cooling is carried out by adopting a blowing mode; and finally, performing tempering treatment for more than two times, wherein the tempering temperature is 430-530 ℃, and the tempering time is 120-170 hours in total.
The technical scheme of the invention is further improved as follows: in the step S1, the trace alloy V, B is added 30-50 minutes before discharging, and the furnace temperature is raised to over 1480 ℃ after adding.
The technical scheme of the invention is further improved as follows: and in the step S2, the casting is cooled to be below the pearlite transformation point in the casting mould and then is cooled at a controlled temperature, and the cooling speed is reduced by adopting a cold-type wrapping heat-insulating material for cooling at the controlled temperature.
The technical scheme of the invention is further improved as follows: and (3) controlling the temperature of the casting in the step (S2) and cooling the casting to any temperature less than or equal to 450 ℃, and then performing stress relief annealing in the step (S3).
The technical scheme of the invention is further improved as follows: and in the step S4, the casting is in a rotating state when cooled in an air blowing mode.
The technical scheme of the invention is further improved as follows: the roller matrix structure after the final heat treatment in the step S4 is a martensite structure, eutectic and nodulated carbides with the content of 25-35% are dispersedly distributed in the roller matrix, and the hardness of the roller body is HSD78-85.
Due to the adoption of the technical scheme, the invention has the technical progress that:
1. the invention develops a high-wear-resistance cast iron roller suitable for the post-rolling section of the hot-rolled plate strip rolling line and a manufacturing method thereof by combining the defects of insufficient wear resistance of the post-rolling section Gao Niege roller of the hot-rolled plate strip rolling and the problem that other materials such as high-speed steel and high-chromium cast iron cannot adapt to the roller. Firstly, the components and the contents of alloy elements in the roller are reasonably determined, the hardenability of the material is improved by controlling the weight percentage content ratio of Cr to C to be more than or equal to 9, and further the Ni and Mo alloy is greatly reduced compared with the conventional high-chromium cast iron material; meanwhile, V, nb and B microelements are added for microalloying treatment, and the microelements form tiny particles which are dispersed and distributed in a matrix to play a pinning role, so that the toughness of the roller is improved; meanwhile, because the content of Mo, V and Nb which are forming elements of the strong carbide is low, the formed carbide is mostly Cr carbide, and can be uniformly worn during rolling;
2. in the manufacturing process, the easily oxidized V, B is added before discharging, the casting is cooled by controlling the temperature in the solidification process, and the roller is subjected to stress relief annealing after opening the box and is uniformly cooled in a rotary cooling mode after quenching, so that the stress level of the roller is greatly reduced, and the rolling requirement of the finish rolling rear section is met;
3. based on the improvement of components and processes, compared with a Gao Niege roller, the roller eliminates graphite soft phase, and the roller has a matrix structure which is transformed from bainite into a martensite structure with higher comprehensive performance; eutectic and point-like carbides with the content of 25-35% are dispersedly distributed in the matrix to form wear-resistant particles, and the content of the carbides reaches the level of high nickel chromium; the impact toughness is improved by 20 percent compared with the conventional high-chromium cast iron, and the hardness of the roll body is HSD78-85. The problem of insufficient wear resistance of a Gao Niege roller at the post-rolling section of a hot-rolled plate strip is effectively solved, and the requirements of short-process full-endless rolling technology development and rolling of stainless steel, silicon steel and high-strength plate rolled material varieties are met.
Drawings
FIG. 1 is a metallographic structure of a high wear-resistant cast iron roll according to the present invention.
Detailed Description
The present invention is further illustrated in detail below with reference to examples:
the high-wear-resistance cast iron roller comprises a roller neck and a roller body, wherein the roller body comprises a working layer and a core part, and the working layer comprises the following chemical components in percentage by weight: c:2.5-3.0%, si:0.50 to 0.90%, mn:1.00 to 1.50 percent of the total weight of the catalyst, and less than or equal to 0.03 percent of P; s is less than or equal to 0.03%, cr:22 to 29%, ni:0.50 to 1.00%, mo: 0.30-0.60%, V + Nb is more than or equal to 0.2% and less than or equal to 0.5%, B:0.2-0.5%, and the balance of Fe and inevitable impurities. Wherein the weight percentage ratio of Cr to C is more than or equal to 9, the hardenability of the material is improved, and further the Ni and Mo alloy is greatly reduced compared with the conventional high-chromium cast iron material. The V, nb and B multi-element alloy is subjected to microalloying treatment, and the trace elements form tiny particles which are dispersed and distributed in a matrix to play a pinning effect, so that the toughness of the roller is improved. Meanwhile, because the content of Mo, V and Nb which are strong carbide forming elements is low, most of the formed carbides are Cr carbides, and the carbides can be uniformly worn during rolling. The working layer is added with V, nb or both.
A manufacturing method of a high-wear-resistance cast iron roller comprises the following steps:
step S1, smelting: smelting scrap steel and alloy serving as raw materials in an induction furnace according to chemical components of a working layer of the roller body, wherein the smelting temperature is 1430-1530 ℃; carrying out V, nb and B microalloy treatment in a furnace, wherein microalloy Nb is added at the beginning of smelting, microalloy V, B is added 30-50 minutes before discharging, and the furnace temperature is increased to be more than 1480 ℃ after adding;
s2, centrifugally casting a roll body working layer and a core filling: the roll body working layer is poured in a centrifugal mode, when the solidification temperature of the roll body working layer reaches a solidus, the core part and the roll neck are poured through core filling, and then the casting is opened after the temperature is controlled and cooled to room temperature in the casting mold; wherein, the casting is cooled to below the pearlite transformation point in the casting mould and then is cooled at a controlled temperature, and the cooling speed is reduced by adopting a cold-type wrapping heat-insulating material for the controlled temperature cooling. Controlling the temperature of the casting to be cooled to any temperature less than or equal to 450 ℃, and then executing the step S3;
step S3, preheating: opening the casting, then performing stress relief annealing at the annealing temperature of 450-800 ℃ for 24-48 hours, and cooling along with the furnace after the heat preservation is finished;
step S4, final heat treatment: the surface of the roller is subjected to heat treatment by adopting a differential quenching method, the quenching temperature is 900-1050 ℃, the quenching heat preservation time is 1-5 hours, the roller is cooled by adopting an air blowing mode, and a casting is in a rotating state when cooled by adopting the air blowing mode, so that the uniform cooling is ensured. And finally, tempering treatment is carried out for more than two times, wherein the tempering temperature is 430-530 ℃, and the tempering time is 120-170 hours in total.
The invention adopts the mode of adding easily oxidized V, B before discharging, adopts the mode of temperature control cooling in the casting solidification process, and carries out stress relief annealing on the roller after opening the box and uniformly cools the roller in the rotary cooling mode after quenching, so that the stress level of the roller is greatly reduced, and the rolling requirement of the post-finishing rolling section is met.
The matrix structure of the roller after final heat treatment is a martensite structure, 25-35% of eutectic and noduliform carbide is dispersedly distributed in the roller matrix to form a wear-resistant mass point, the impact toughness is improved by 20% compared with the conventional high-chromium cast iron, and the hardness of the roller body is HSD78-85.
FIG. 1 is a metallographic structure photograph of a high-wear-resistant cast iron roll for a post-finishing section of a hot-rolled strip rolling line according to the present invention; the microstructure of the working layer is a photograph magnified by 500 times and photographed by an optical microscope under a corrosion state, white is carbide, and black is a martensite matrix.
The present invention will be described in further detail with reference to the following examples:
item Example 1 Example 2 Example 3 Example 4 Example 5 Comparative example 1
C(％) 2.50 2.65 2.78 2.89 3.00 3.25
Si(％) 0.55 0.68 0.90 0.79 0.78 1.25
Mn(％) 1.03 1.12 1.09 1.25 1.45 1.20
P(％) 0.02 0.03 0.02 0.02 0.02 0.02
S(％) 0.02 0.03 0.03 0.03 0.02 0.02
Cr(％) 22.0 25.4 26.5 28.2 29.0 1.85
Ni(％) 1.00 0.85 0.75 0.65 0.50 4.40
Mo(％) 0.45 0.30 0.50 0.60 0.38 0.55
V(％) 0.2 0 0.15 0.20 0.10 0.45
Nb(％) 0 0.25 0.10 0.30 0.25 -
B(％) 0.35 0.20 0.45 0.50 0.25 -
Graphite Is free of Is free of Is free of Is free of Is free of Is provided with
Base body Martensite Martensite Martensite Martensite Martensite Bainite for treating cancer
Content of carbide% 25.72 29.44 31.65 33.94 35.00 30.35
Hardness HSD 78 80 82 81 85 80
Based on the improvement of components and process, compared with the high-nickel-chromium roller in the comparative example 1, the high-nickel-chromium roller eliminates the graphite soft phase, and the roller matrix structure has a martensite structure with higher comprehensive performance converted from bainite; eutectic and point-like carbides with the content of 25-35% are dispersedly distributed in the matrix to form wear-resistant particles, and the content of the carbides reaches the level of high nickel chromium; compared with the conventional high-chromium cast iron, the impact toughness is improved by 20 percent, the hardness of the roll body is HSD78-85, the problem of poor wear resistance of the conventional high-nickel-chromium roll in the use of the post-finishing section of a hot-rolled plate strip is effectively solved, and the requirements of short-process endless rolling and rolling of rolled material varieties such as stainless steel, silicon steel, high-strength plates and the like are met.

Claims (9)

1. The high-wear-resistance cast iron roll is characterized in that: the roll comprises a roll neck and a roll body, wherein the roll body comprises a working layer and a core part, and the working layer comprises the following chemical components in percentage by weight: c:2.5-3.0%, si:0.50 to 0.90%, mn:1.00 to 1.50 percent of the total weight of the composition, and less than or equal to 0.03 percent of P; s is less than or equal to 0.03%, cr:22 to 29%, ni:0.50 to 1.00%, mo: 0.30-0.60%, V + Nb is more than or equal to 0.2% and less than or equal to 0.5%, B:0.2-0.5%, and the balance of Fe and inevitable impurities.
2. The high wear-resistant cast iron roll according to claim 1, characterized in that: the weight percentage content ratio of Cr to C is more than or equal to 9.
3. The high wear-resistant cast iron roll according to claim 1, characterized in that: the V, nb and B multi-component alloy is subjected to microalloying treatment, and any one or both of V, nb are added into the chemical components of the working layer.
4. The manufacturing method of the high-wear-resistance cast iron roller is characterized by comprising the following steps of: the method comprises the following steps:
step S1, smelting: smelting the waste steel and the alloy serving as raw materials in an induction furnace according to the chemical components of the working layer of the roller body, wherein the smelting temperature is 1430-1530 ℃; carrying out V, nb and B microalloy treatment in a furnace, wherein the microalloy Nb is added when smelting is started, and the microalloy V, B is added before discharging;
s2, centrifugally casting a roll body working layer and a core filling: the roll body working layer is poured in a centrifugal mode, when the solidification temperature of the roll body working layer reaches a solidus, the core part and the roll neck are poured through core filling, and then the casting is opened after the temperature is controlled and cooled to room temperature in the casting mold;
step S3, preheating: opening the casting, then performing stress relief annealing at the annealing temperature of 450-800 ℃ for 24-48 hours, and cooling along with the furnace after the heat preservation is finished;
step S4, final heat treatment: carrying out heat treatment on the surface of the roller by adopting a differential quenching method, wherein the quenching temperature is 900-1050 ℃, the quenching heat preservation time is 1-5 hours, and cooling by adopting an air blowing mode; and finally, tempering treatment is carried out for more than two times, wherein the tempering temperature is 430-530 ℃, and the tempering time is 120-170 hours in total.
5. The method for manufacturing a high wear-resistant cast iron roll according to claim 4, wherein: in the step S1, the trace alloy V, B is added 30-50 minutes before discharging, and the furnace temperature is raised to over 1480 ℃ after adding.
6. The method for manufacturing a high wear-resistant cast iron roll according to claim 4, wherein: and in the step S2, the casting is cooled to be below the pearlite transformation point in the casting mould and then is cooled at a controlled temperature, and the cooling speed is reduced by adopting a cold-type wrapping heat-insulating material for cooling at the controlled temperature.
7. The method for manufacturing a high wear-resistant cast iron roll according to claim 6, wherein: and (3) after the casting in the step (S2) is cooled to any temperature less than or equal to 450 ℃ by controlling the temperature, performing stress relief annealing in the step (S3).
8. The method for manufacturing a high wear-resistant cast iron roll according to claim 4, wherein: and in the step S4, the casting is in a rotating state when cooled in an air blowing mode.
9. The method for manufacturing a high wear-resistant cast iron roll according to claim 4, wherein: the roller matrix structure after the final heat treatment in the step S4 is a martensite structure, eutectic and nodulated carbides with the content of 25-35% are dispersedly distributed in the roller matrix, and the hardness of the roller body is HSD78-85.
CN202210778456.5A 2022-06-30 2022-06-30 High-wear-resistance cast iron roller and manufacturing method thereof Active CN115161537B (en)

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CN116334474A (en) * 2023-02-17 2023-06-27 安庆帝伯格茨缸套有限公司 High-performance corrosion-resistant diesel engine cylinder sleeve material

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