CN114737139A - Grain grinding roller and preparation method thereof - Google Patents

Grain grinding roller and preparation method thereof Download PDF

Info

Publication number
CN114737139A
CN114737139A CN202210233526.9A CN202210233526A CN114737139A CN 114737139 A CN114737139 A CN 114737139A CN 202210233526 A CN202210233526 A CN 202210233526A CN 114737139 A CN114737139 A CN 114737139A
Authority
CN
China
Prior art keywords
grinding roller
layer material
outer layer
inner layer
mold
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.)
Pending
Application number
CN202210233526.9A
Other languages
Chinese (zh)
Inventor
华勇略
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN202210233526.9A priority Critical patent/CN114737139A/en
Publication of CN114737139A publication Critical patent/CN114737139A/en
Pending legal-status Critical Current

Links

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
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • B22D13/023—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis the longitudinal axis being horizontal
    • 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
    • B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
    • 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
    • C22C38/44—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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

The invention discloses a grain grinding roller and a preparation method thereof, wherein the grinding roller comprises a grinding roller outer layer and a grinding roller inner layer, and the grinding roller outer layer comprises the following raw materials in percentage by weight: c: 2.72-3.77%, Si: 0.35-0.45%, Mn: 0.4-0.6%, P: 0.65-0.75%, S: 0.04-0.06%, Cr: 1.1-1.2%, Ni: 0.9-1.0%, V: 0.05%, Ti: 0.05%, Mo: 0.15-0.25% of Fe and the balance of Fe; the inner layer of the grinding roller comprises the following raw materials in percentage by weight: c: 3.50-3.80%, Si: 1.50-1.75%, Mn: 0.45-0.65%, P: < 0.08%, S: less than 0.08 percent and the balance of Fe.

Description

Grain grinding roller and preparation method thereof
The technical field is as follows:
the invention belongs to the field of grinding roller preparation, and particularly relates to a grain grinding roller and a preparation method thereof.
Background art:
the grain grinding roller is important equipment for grain processing, the grinding roller with excellent performance can improve grinding efficiency, prolong replacement period, save energy and improve grain processing quality, the grinding roller is usually required to bear grains with certain weight in work and is required to have certain wear resistance and strength in grinding, the grain grinding roller is mostly manufactured by adopting a forging technology at present, the technology is complex in production process, long in working procedure, high in labor intensity and high in production cost, and the manufactured grinding roller cannot take into consideration multiple performances such as excellent wear resistance and toughness.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
The invention content is as follows:
the present invention is directed to a grain pulverizing mill roll and a method for preparing the same, which overcome the above-mentioned disadvantages of the prior art.
In order to achieve the purpose, the invention provides a grain grinding roller which comprises a grinding roller outer layer and a grinding roller inner layer, wherein the grinding roller outer layer comprises the following raw materials in percentage by weight: c: 2.72-3.77%, Si: 0.35-0.45%, Mn: 0.4-0.6%, P: 0.65-0.75%, S: 0.04-0.06%, Cr: 1.1-1.2%, Ni: 0.9-1.0%, V: 0.05%, Ti: 0.05%, Mo: 0.15-0.25% of Fe and the balance of Fe; the inner layer of the grinding roller comprises the following raw materials in percentage by weight: c: 3.50-3.80%, Si: 1.50-1.75%, Mn: 0.45-0.65%, P: < 0.08%, S: less than 0.08 percent and the balance of Fe.
Preferably, the outer layer of the grinding roller comprises the following raw materials in percentage by weight: c: 3.35%, Si: 0.40%, Mn: 0.50%, P: 0.70%, S: 0.05%, Cr: 1.15%, Ni: 0.95%, V: 0.05%, Ti: 0.05%, Mo: 0.18 percent and the balance of Fe; the inner layer of the grinding roller comprises the following raw materials in percentage by weight: c: 3.60%, Si: 1.62%, Mn: 0.53%, P: < 0.08%, S: less than 0.08 percent and the balance of Fe.
Preferably, the thickness of the outer layer of the grinding roller is 25-30mm, and the thickness of the inner layer is 80.5-84.5 mm.
A preparation method of a grain grinding roller comprises the following steps:
(1) preparing an outer layer material of the grinding roller according to a proportion, melting the outer layer material, adding the melted outer layer material into a mold of a centrifugal casting machine, and throwing the melted outer layer material at the inner wall of the mold by high-speed rotation of the mold to form the outer layer material of the grinding roller;
(2) preparing the inner layer material of the grinding roller according to the proportion, melting the inner layer material, adding the melted inner layer material into a mold of a centrifugal casting machine again, and throwing the melted inner layer material at the inner wall of the outer layer material by the high-speed rotation of the mold;
(3) and after the outer layer material and the inner layer material are cooled, stopping the rotation of the mold, opening the mold, and taking out the formed grinding roller.
Preferably, the casting temperature of the outer layer material of the grinding roller is 1560-1590 ℃ and the casting temperature of the inner layer material is 1460-1490 ℃.
Preferably, the rotating speed of the centrifugal casting machine is controlled to 1250-.
Preferably, the cooling is performed by a stage cooling method, wherein the cooling is performed by firstly cooling to 1350-.
Preferably, the centrifugal casting machine is a horizontal centrifugal casting machine, and casting is performed in a double-head casting mode.
Preferably, the outer layer material and the inner layer material of the grinding roller are of an integrated structure.
The outer layer material selection and proportioning reason of the invention is as follows:
c: carbon is a basic element, the hardness and the wear resistance of the material can be improved by increasing the content of the carbon in a proper amount, but the toughness is reduced, the brittleness is increased and the machining performance is poor due to overhigh content, and the content of C is selected to be 2.72-3.77% by comprehensive consideration.
Si: increasing the silicon content will reduce the eutectic carbon content, reducing the strength and toughness, thus controlling the silicon content to 0.35-0.45%.
Mn: mn is a weak carbide forming element and enters the cementite part to replace iron atoms to form alloy cementite, the manganese can obtain refined pearlite, the precipitation of carbide and the like is inhibited, the manganese has a stabilizing effect on austenite, and the content of manganese is selected to be 0.4-0.6% in comprehensive consideration.
P and S: p and S are non-carbide forming elements and are almost completely dissolved in solid solution, the brittleness and the toughness of the material are increased, the material is a harmful element, and P: 0.65-0.75%, S: 0.04-0.06%.
Cr: cr is easy to form alloy carbide, strengthens a matrix, refines a structure and reduces an austenite region, and proper amount of added chromium is beneficial to improving the hardness and the wear resistance, but the hardness is too high when the content is too high, the surface machining and repairing are difficult, and the content of the chromium is comprehensively considered to be 1.1-1.2%.
Ni: ni belongs to non-carbon compound forming elements, has the solid solution strengthening effect, can effectively improve hardenability, stabilize austenite and promote martensite or bainite structure, thereby improving plasticity and toughness, and the nickel content is selected to be 0.9-1.0 percent in comprehensive consideration.
V: v is a strong carbide forming element, can refine crystal grains, improve toughness, improve hardenability and reduce overheating sensitivity, and has a crystal refining effect far larger than that of nickel and molybdenum, but the vanadium content is selected to be 0.05% in consideration of high price of the vanadium.
Ti: ti can deoxidize and fix nitrogen until the iron liquid is purified, and the Ti can refine grains, improve the structure, refine austenite dendrites and reduce the directionality thereof, so that the strength and the toughness can be improved, and the content of Ti is comprehensively considered and selected to be 0.05 percent.
Mo: mo has the functions of improving hardenability and reducing the hardness difference between the surface and the central part of a casting, but the molybdenum content is selected to be 0.15-0.25% at a lower value by comprehensively considering the high price of the molybdenum.
Compared with the prior art, one aspect of the invention has the following beneficial effects:
(1) the grinding roller adopts an inner-outer double-layer design, raw materials and proportion of an inner layer and an outer layer are optimized, wherein a small amount of Cr, Ni, V, Ti, Mo and the like are added in the outer layer material besides the basic raw materials, and the mechanical property of the outer layer structure can be improved on the basis of not obviously increasing the cost; meanwhile, the inner layer material is softer, more flexible and more superior in impact resistance compared with the outer layer material, so that the structure of the grinding roller of which the outer layer mainly bears grinding work and the inner layer mainly bears weighing work is more reasonable;
(2) the grinding roller is prepared by adopting a centrifugal manufacturing process, a double-head casting mode is adopted, no seam exists between the inner layer and the outer layer and between the inner layer and the outer layer as well as between the inner layer and the outer layer as a whole, the production efficiency of the grinding roller can be improved, and the quality of the grinding roller can be improved;
(3) the invention adopts a sectional cooling mode after casting, so that the grinding roller can be cooled more uniformly, the uniformity and the compactness of the internal structure of the material are improved, and the overall mechanical property of the grinding roller can be improved.
The specific implementation mode is as follows:
the following detailed description of specific embodiments of the invention is provided, but it should be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Example 1:
the grain grinding roller comprises a grinding roller outer layer and a grinding roller inner layer, wherein the grinding roller outer layer comprises the following raw materials in percentage by weight: c: 3.35%, Si: 0.40%, Mn: 0.50%, P: 0.70%, S: 0.05%, Cr: 1.15%, Ni: 0.95%, V: 0.05%, Ti: 0.05%, Mo: 0.18 percent and the balance of Fe; the inner layer of the grinding roller comprises the following raw materials in percentage by weight: c: 3.60%, Si: 1.62%, Mn: 0.53%, P: < 0.08%, S: less than 0.08 percent and the balance of Fe.
Preferably, the thickness of the outer layer of the grinding roller is 28mm, and the thickness of the inner layer is 82 mm. The structural design can ensure certain bearing capacity and ensure that the outer layer structure for grinding grains has sufficiently superior mechanical properties.
A preparation method of a grain grinding roller comprises the following steps:
(1) preparing the outer layer material of the grinding roller according to the proportion, melting the outer layer material, adding the melted outer layer material into a mold of a centrifugal casting machine, and throwing the melted outer layer material at the inner wall of the mold by high-speed rotation of the mold to form the outer layer material of the grinding roller;
(2) preparing the inner layer material of the grinding roller according to the proportion, melting the inner layer material, adding the melted inner layer material into a mold of a centrifugal casting machine again, and throwing the melted inner layer material at the inner wall of the outer layer material by the high-speed rotation of the mold;
(3) and after the outer layer material and the inner layer material are cooled, stopping the rotation of the mold, opening the mold, and taking out the formed grinding roller.
Preferably, the casting temperature of the outer layer material of the grinding roller is 1565 +/-5 ℃ when casting, and the casting temperature of the inner layer material of the grinding roller is 1475 +/-5 ℃.
Preferably, the rotating speed of the centrifugal casting machine is controlled to be 1275 +/-5 r/min when the outer layer material and the inner layer material are cast.
Preferably, the cooling is performed by a stage cooling method, wherein the cooling is performed by firstly cooling to 1350-.
Preferably, the centrifugal casting machine is a horizontal centrifugal casting machine, and casting is performed in a double-head casting mode.
The grinding roller prepared by adopting the proportion and the method has excellent mechanical properties, wherein the Rockwell hardness HRC of the outer layer is 73, the Rockwell hardness HRC of the inner layer is 71, the integral impact strength AKV (-40 ℃) is 75J, and the integral yield strength is 589 Mpa.
Example 2:
the grain grinding roller comprises a grinding roller outer layer and a grinding roller inner layer, wherein the grinding roller outer layer comprises the following raw materials in percentage by weight: c: 2.72%, Si: 0.35%, Mn: 0.4%, P: 0.65%, S: 0.04%, Cr: 1.1%, Ni: 0.9%, V: 0.05%, Ti: 0.05%, Mo: 0.15 percent and the balance of Fe; the inner layer of the grinding roller comprises the following raw materials in percentage by weight: c: 3.50%, Si: 1.50%, Mn: 0.45%, P: < 0.08%, S: less than 0.08 percent and the balance of Fe.
Preferably, the thickness of the outer layer of the grinding roller is 25mm, and the thickness of the inner layer is 80.5 mm.
A preparation method of a grain grinding roller comprises the following steps:
(1) preparing an outer layer material of the grinding roller according to a proportion, melting the outer layer material, adding the melted outer layer material into a mold of a centrifugal casting machine, and throwing the melted outer layer material at the inner wall of the mold by high-speed rotation of the mold to form the outer layer material of the grinding roller;
(2) preparing the inner layer material of the grinding roller according to the proportion, melting the inner layer material, adding the melted inner layer material into a mold of a centrifugal casting machine again, and throwing the melted inner layer material at the inner wall of the outer layer material by the high-speed rotation of the mold;
(3) and after the outer layer material and the inner layer material are cooled, stopping the rotation of the mold, opening the mold, and taking out the formed grinding roller.
Preferably, the casting temperature of the outer layer material of the grinding roller is 1560 +/-5 ℃ when casting, and the casting temperature of the inner layer material of the grinding roller is 1460 +/-5 ℃.
Preferably, the rotating speed of the centrifugal casting machine is controlled to be 1250 +/-5 r/min when the outer layer material and the inner layer material are cast.
Preferably, the cooling is performed by a stage cooling method, wherein the cooling is performed by firstly cooling to 1350-.
Preferably, the centrifugal casting machine is a horizontal centrifugal casting machine, and casting is performed in a double-head casting mode.
The grinding roller prepared by adopting the proportion and the method has excellent mechanical properties, wherein the Rockwell hardness HRC of the outer layer is 68, the Rockwell hardness HRC of the inner layer is 66, the integral impact strength AKV (-40 ℃) is 69J, and the integral yield strength is 578 Mpa.
Example 3:
the grain grinding roller comprises a grinding roller outer layer and a grinding roller inner layer, wherein the grinding roller outer layer comprises the following raw materials in percentage by weight: c: 3.77%, Si: 0.0.45%, Mn: 0.6%, P: 0.75%, S: 0.06%, Cr: 1.2%, Ni: 1.0%, V: 0.05%, Ti: 0.05%, Mo: 0.25 percent and the balance of Fe; the inner layer of the grinding roller comprises the following raw materials in percentage by weight: c: 3.80%, Si: 1.75%, Mn: 0.65%, P: < 0.08%, S: less than 0.08 percent and the balance of Fe.
Preferably, the thickness of the outer layer of the grinding roller is 30mm, and the thickness of the inner layer is 84.5 mm.
A preparation method of a grain grinding roller comprises the following steps:
(1) preparing an outer layer material of the grinding roller according to a proportion, melting the outer layer material, adding the melted outer layer material into a mold of a centrifugal casting machine, and throwing the melted outer layer material at the inner wall of the mold by high-speed rotation of the mold to form the outer layer material of the grinding roller;
(2) preparing the inner layer material of the grinding roller according to the proportion, melting the inner layer material, adding the melted inner layer material into a mold of a centrifugal casting machine again, and throwing the melted inner layer material at the inner wall of the outer layer material by the high-speed rotation of the mold;
(3) and after the outer layer material and the inner layer material are cooled, stopping the rotation of the mold, opening the mold, and taking out the formed grinding roller.
Preferably, the casting temperature of the outer layer material of the grinding roller is 1590 +/-5 ℃ when casting, and the casting temperature of the inner layer material of the grinding roller is 1490 +/-5 ℃.
Preferably, the rotating speed of the centrifugal casting machine is controlled to be 1300 +/-5 r/min when the outer layer material and the inner layer material are cast.
Preferably, the cooling is performed by a stage cooling method, wherein the cooling is performed by firstly cooling to 1350-.
Preferably, the centrifugal casting machine is a horizontal centrifugal casting machine, and casting is performed in a double-head casting mode.
The grinding roller prepared by adopting the proportion and the method has excellent mechanical properties, wherein the Rockwell hardness HRC of the outer layer is 72, the Rockwell hardness HRC of the inner layer is 69, the integral impact strength AKV (-40 ℃) is 73J, and the integral yield strength is 585 Mpa.
Example 4:
the grain grinding roller comprises a grinding roller outer layer and a grinding roller inner layer, wherein the grinding roller outer layer comprises the following raw materials in percentage by weight: c: 2.85%, Si: 0.38%, Mn: 0.46%, P: 0.68%, S: 0.045%, Cr: 1.15%, Ni: 0.95%, V: 0.05%, Ti: 0.05%, Mo: 0.18 percent and the balance of Fe; the inner layer of the grinding roller comprises the following raw materials in percentage by weight: c: 3.63%, Si: 1.62%, Mn: 0.48%, P: < 0.08%, S: less than 0.08 percent and the balance of Fe.
Preferably, the thickness of the outer layer of the grinding roller is 26mm, and the thickness of the inner layer of the grinding roller is 82 mm.
A preparation method of a grain grinding roller comprises the following steps:
(1) preparing an outer layer material of the grinding roller according to a proportion, melting the outer layer material, adding the melted outer layer material into a mold of a centrifugal casting machine, and throwing the melted outer layer material at the inner wall of the mold by high-speed rotation of the mold to form the outer layer material of the grinding roller;
(2) preparing the inner layer material of the grinding roller according to the proportion, melting the inner layer material, adding the melted inner layer material into a mold of a centrifugal casting machine again, and throwing the melted inner layer material at the inner wall of the outer layer material by the high-speed rotation of the mold;
(3) and after the outer layer material and the inner layer material are cooled, stopping the rotation of the mold, opening the mold, and taking out the formed grinding roller.
Preferably, the casting temperature of the outer layer material of the grinding roller is 1570 +/-5 ℃ when the grinding roller is cast, and the casting temperature of the inner layer material of the grinding roller is 1470 +/-5 ℃.
Preferably, the rotating speed of the centrifugal casting machine is controlled to be 1265 +/-5 r/min when the outer layer material and the inner layer material are cast.
Preferably, the cooling is performed by a stage cooling method, wherein the cooling is performed by firstly cooling to 1350-.
Preferably, the centrifugal casting machine is a horizontal centrifugal casting machine, and casting is performed in a double-head casting mode.
Preferably, the outer layer material and the inner layer material of the prepared grinding roller are of an integrated structure.
The grinding roller prepared by adopting the proportion and the method has excellent mechanical properties, wherein the Rockwell hardness HRC of the outer layer is 69, the Rockwell hardness HRC of the inner layer is 67, the integral impact strength AKV (-40 ℃) is 68J, and the integral yield strength is 579 Mpa.
Example 5:
the grain grinding roller comprises a grinding roller outer layer and a grinding roller inner layer, wherein the grinding roller outer layer comprises the following raw materials in percentage by weight: c: 3.65%, Si: 0.42%, Mn: 0.55%, P: 0.72%, S: 0.55%, Cr: 1.18%, Ni: 0.97%, V: 0.05%, Ti: 0.05%, Mo: 0.22 percent and the balance of Fe; the inner layer of the grinding roller comprises the following raw materials in percentage by weight: c: 3.75%, Si: 1.65%, Mn: 0.55%, P: < 0.08%, S: less than 0.08 percent and the balance of Fe.
Preferably, the thickness of the outer layer of the grinding roller is 29mm, and the thickness of the inner layer of the grinding roller is 83 mm.
A preparation method of a grain grinding roller comprises the following steps:
(1) preparing an outer layer material of the grinding roller according to a proportion, melting the outer layer material, adding the melted outer layer material into a mold of a centrifugal casting machine, and throwing the melted outer layer material at the inner wall of the mold by high-speed rotation of the mold to form the outer layer material of the grinding roller;
(2) preparing the inner layer material of the grinding roller according to the proportion, melting the inner layer material, adding the melted inner layer material into a mold of a centrifugal casting machine again, and throwing the melted inner layer material at the inner wall of the outer layer material by the high-speed rotation of the mold;
(3) and after the outer layer material and the inner layer material are cooled, stopping the rotation of the mold, opening the mold, and taking out the formed grinding roller.
Preferably, the casting temperature of the outer layer material of the grinding roller is 1580 +/-5 ℃ when casting, and the casting temperature of the inner layer material of the grinding roller is 1480 +/-5 ℃.
Preferably, the rotating speed of the centrifugal casting machine is controlled to be 1285 +/-5 r/min when the outer layer material and the inner layer material are cast.
Preferably, the cooling is performed by a stage cooling method, wherein the cooling is performed by firstly cooling to 1350-.
Preferably, the centrifugal casting machine is a horizontal centrifugal casting machine, and casting is performed in a double-head casting mode.
Preferably, the outer layer material and the inner layer material of the prepared grinding roller are of an integrated structure.
The grinding roller prepared by adopting the proportion and the method has excellent mechanical properties, wherein the Rockwell hardness HRC of the outer layer is 71, the Rockwell hardness HRC of the inner layer is 68, the integral impact strength AKV (-40 ℃) is 72J, and the integral yield strength is 582 Mpa.
In conclusion, the grinding roller obtained by adopting the raw material proportion and the preparation method has excellent mechanical property, the production and preparation processes of the grinding roller are simple, and the production efficiency of the grinding roller can be improved.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (9)

1. A grinding roller is smashed to cereal which characterized in that: the grinding roller outer layer comprises the following raw materials in percentage by weight: c: 2.72-3.77%, Si: 0.35-0.45%, Mn: 0.4-0.6%, P: 0.65-0.75%, S: 0.04-0.06%, Cr: 1.1-1.2%, Ni: 0.9-1.0%, V: 0.05%, Ti: 0.05%, Mo: 0.15-0.25% of Fe and the balance of Fe; the inner layer of the grinding roller comprises the following raw materials in percentage by weight: c: 3.50-3.80%, Si: 1.50-1.75%, Mn: 0.45-0.65%, P: < 0.08%, S: less than 0.08 percent and the balance of Fe.
2. A grain grinding roll according to claim 1, wherein: the outer layer of the grinding roller comprises the following raw materials in percentage by weight: c: 3.35%, Si: 0.40%, Mn: 0.50%, P: 0.70%, S: 0.05%, Cr: 1.15%, Ni: 0.95%, V: 0.05%, Ti: 0.05%, Mo: 0.18 percent and the balance of Fe; the inner layer of the grinding roller comprises the following raw materials in percentage by weight: c: 3.60%, Si: 1.62%, Mn: 0.53%, P: < 0.08%, S: less than 0.08 percent and the balance of Fe.
3. A grain grinding roll according to claim 1, wherein: the thickness of the outer layer of the grinding roller is 25-30mm, and the thickness of the inner layer of the grinding roller is 80.5-84.5 mm.
4. A preparation method of a grain grinding roller is characterized in that: the method comprises the following steps:
(1) preparing an outer layer material of the grinding roller according to a proportion, melting the outer layer material, adding the melted outer layer material into a mold of a centrifugal casting machine, and throwing the melted outer layer material at the inner wall of the mold by high-speed rotation of the mold to form the outer layer material of the grinding roller;
(2) preparing the inner layer material of the grinding roller according to the proportion, melting the inner layer material, adding the melted inner layer material into a mold of a centrifugal casting machine again, and throwing the melted inner layer material at the inner wall of the outer layer material by the high-speed rotation of the mold;
(3) and after the outer layer material and the inner layer material are cooled, stopping the rotation of the mold, opening the mold, and taking out the formed grinding roller.
5. A method of manufacturing a grain-grinding roller as claimed in claim 4, wherein: the casting temperature of the grinding roller outer layer material is 1560-1590 ℃ and the casting temperature of the grinding roller inner layer material is 1460-1490 ℃.
6. A method of manufacturing a grain-grinding roller as claimed in claim 4, wherein: the rotating speed of the centrifugal casting machine is controlled to 1250-1300r/min when the outer layer material and the inner layer material are cast.
7. A method of manufacturing a grain-grinding roller as claimed in claim 4, wherein: and a stage cooling mode is adopted during cooling, firstly, the mixture is cooled to 1350-.
8. A method of manufacturing a grain-grinding roller as claimed in claim 4, wherein: the centrifugal casting machine adopts a horizontal centrifugal casting machine and adopts a double-head casting mode for casting.
9. A method of manufacturing a grain-grinding roller as claimed in claim 4, wherein: the outer layer material and the inner layer material of the prepared grinding roller are of an integrated structure.
CN202210233526.9A 2022-03-09 2022-03-09 Grain grinding roller and preparation method thereof Pending CN114737139A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210233526.9A CN114737139A (en) 2022-03-09 2022-03-09 Grain grinding roller and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210233526.9A CN114737139A (en) 2022-03-09 2022-03-09 Grain grinding roller and preparation method thereof

Publications (1)

Publication Number Publication Date
CN114737139A true CN114737139A (en) 2022-07-12

Family

ID=82274973

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210233526.9A Pending CN114737139A (en) 2022-03-09 2022-03-09 Grain grinding roller and preparation method thereof

Country Status (1)

Country Link
CN (1) CN114737139A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006299360A (en) * 2005-04-22 2006-11-02 Nippon Steel Corp Heat treatment method of complex roll for rolling
CN104250712A (en) * 2013-06-27 2014-12-31 湖北金标通用轧辊有限公司 Method for manufacturing large-size, high-toughness and wear-resistant alloy roller
CN105821333A (en) * 2016-05-26 2016-08-03 湖北金标通用轧辊有限公司 Manufacturing method of low-alloy grinding roller
CN107574359A (en) * 2017-09-04 2018-01-12 湖北金标通用轧辊有限公司 A kind of low-alloy composite roll and its manufacture method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006299360A (en) * 2005-04-22 2006-11-02 Nippon Steel Corp Heat treatment method of complex roll for rolling
CN104250712A (en) * 2013-06-27 2014-12-31 湖北金标通用轧辊有限公司 Method for manufacturing large-size, high-toughness and wear-resistant alloy roller
CN105821333A (en) * 2016-05-26 2016-08-03 湖北金标通用轧辊有限公司 Manufacturing method of low-alloy grinding roller
CN107574359A (en) * 2017-09-04 2018-01-12 湖北金标通用轧辊有限公司 A kind of low-alloy composite roll and its manufacture method

Similar Documents

Publication Publication Date Title
ES2887082T3 (en) High-strength, high-toughness, low-alloy steel panel and method of making the same
CN105821296B (en) A kind of high-chromium alloy cast-iron roll and preparation method thereof
CN102251183B (en) Boron-containing high-chromium wear-resistant alloy and preparation method thereof
CN109023119B (en) Wear-resistant steel with excellent ductility and toughness and manufacturing method thereof
CN1328406C (en) Martensite wear resistant cast steel with film austenic toughened and its manufacturing method
CN101805869B (en) Boron-contained high-chromium high-speed steel roller material and heat treatment method thereof
CN113637889B (en) Preparation method of boron-containing high-chromium wear-resistant steel ball
CN105002439A (en) Wear-resistant steel with 400-level Brinell hardness and manufacturing method thereof
CN111809115B (en) Super-thick plastic die steel with excellent impact corrosion wear resistance and preparation method thereof
CN104694827B (en) A kind of casting high strength wear-proof medium carbon steel and preparation method thereof
CN101849028B (en) High tensile steel for deep drawing and manufacturing method thereof
CN1854328A (en) Improved composite high-chromium iron-cast roller
CN112877591B (en) High-strength and high-toughness hardware tool and steel for chain and manufacturing method thereof
CN109735762B (en) Alloy hammer head and preparation method thereof
CN101497965B (en) Steel for cutting edge of shovel of loader and digger and production method thereof
CN114737139A (en) Grain grinding roller and preparation method thereof
CN106544583A (en) A kind of super abrasive H13 mould steel
CN102337467A (en) Scraper knife blade purposed steel with Brinell hardness of 470-520 and production method thereof
CN102312170A (en) Martensite wear-resistant cast steel
CN112359273B (en) High-hardness high-carbon medium-chromium wear-resistant cast iron and preparation method thereof
KR101306241B1 (en) Direct - quenched low carbon micro-alloyed steels having high strength and high impact toughness and method for manufacturing thereof
CN112921233A (en) Synthetic cast iron cylinder sleeve and preparation method thereof
CN105603323A (en) Large-thickness high-strength high-toughness NM360 steel plate and production method thereof
CN100415920C (en) Intermediate alloy in use for wear resisting steel iron material, and usage
CN115287552B (en) Lightweight low-alloy steel casting, preparation method and application 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