CN115041686A - Preparation method of high-speed steel working roll - Google Patents
Preparation method of high-speed steel working roll Download PDFInfo
- Publication number
- CN115041686A CN115041686A CN202210724481.5A CN202210724481A CN115041686A CN 115041686 A CN115041686 A CN 115041686A CN 202210724481 A CN202210724481 A CN 202210724481A CN 115041686 A CN115041686 A CN 115041686A
- Authority
- CN
- China
- Prior art keywords
- speed steel
- percent
- equal
- less
- manufacturing
- 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.)
- Granted
Links
- 229910000997 High-speed steel Inorganic materials 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000004663 powder metallurgy Methods 0.000 claims abstract description 25
- 238000005245 sintering Methods 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 18
- 238000005266 casting Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims description 27
- 238000000498 ball milling Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 239000000956 alloy Substances 0.000 claims description 17
- 238000001035 drying Methods 0.000 claims description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 229940057995 liquid paraffin Drugs 0.000 claims description 10
- 229910052758 niobium Inorganic materials 0.000 claims description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 238000005056 compaction Methods 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 229910052720 vanadium Inorganic materials 0.000 claims description 6
- 239000003350 kerosene Substances 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 238000000137 annealing Methods 0.000 claims description 4
- 230000007547 defect Effects 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 3
- 238000009694 cold isostatic pressing Methods 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 238000007873 sieving Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000013329 compounding Methods 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 description 11
- 238000005096 rolling process Methods 0.000 description 9
- 239000002994 raw material Substances 0.000 description 8
- 239000011651 chromium Substances 0.000 description 7
- 238000001914 filtration Methods 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 238000012216 screening Methods 0.000 description 6
- 238000001291 vacuum drying Methods 0.000 description 6
- 229910001309 Ferromolybdenum Inorganic materials 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000011049 filling Methods 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 229910000628 Ferrovanadium Inorganic materials 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F5/106—Tube or ring forms
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1017—Multiple heating or additional steps
- B22F3/1021—Removal of binder or filler
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1035—Liquid phase sintering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- 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
-
- 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
- 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
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
- C22C38/18—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
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- 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
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- 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
- C22C38/56—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.7% by weight of carbon
-
- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Fluid Mechanics (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a preparation method of a high-speed steel working roll, which belongs to the technical field of powder metallurgy roll preparation, wherein the powder metallurgy technology is applied to the field of rolls, and the powder metallurgy roll with high fine grain size, high wear resistance and high tissue uniformity is obtained through powder preparation, sample blank preparation, sintering, further casting compounding and heat treatment.
Description
Technical Field
The invention relates to a preparation method of a high-speed steel working roller, belonging to the technical field of powder metallurgy roller preparation.
Background
With the development of short-process rolling technology, the near net shape forming technology has a vigorous development trend in the rolling field and the steel industry, the performance requirement on the roller is continuously improved, the structure of the powder metallurgy roller is compact, the segregation generated in the solidification process of the conventional casting roller can be eliminated, meanwhile, the powder metallurgy roller has the advantage of good formability, the characteristic of near net shape manufacturing is met, and meanwhile, the requirements of the roller for short-process long-roller service rolling can be met due to fine grains, high wear resistance and high uniformity of the structure.
The problem that how to determine the preparation process by researching and developing the powder metallurgy high-speed steel according to the characteristics of rear-section rolling, finished product rolling frames and short-process rolling is urgently needed to be solved by developing a powder metallurgy high-speed steel working roll.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a preparation method of a high-speed steel working roll, which is used for meeting the requirement of using high-speed steel at the rear section of a hot rolling line, particularly a finished product rack, meeting the requirement of a roll for a short-process rolling line and improving the quality of the roll.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a preparation method of a high-speed steel working roll comprises the following steps of: c: 1.0-2.30%, Si: 0.5-2.0%, B: 0.5-1.5%, Mn: 0.2-1.2%, P is less than or equal to 0.10%, S is less than or equal to 0.1%, Cr: 1.0-8.0%, Ni: 0.5-1.20%, Mo: 2.0-10.00%, V: 2.00-10.00, W: 0.1-5.0 percent of Nb, less than or equal to 1.0 percent of Nb, and the balance of Fe;
the preparation method comprises the following steps:
step A, putting the alloy materials according to the proportion into a ball mill for ball milling;
step B, after the ball milling is finished, the vacuum degree is less than or equal to 10 -3 Heating and drying in a vacuum furnace of Pa, cooling to 30-50 ℃, grinding, and sieving with a sieve of not less than 400 meshes to prepare powder for later use;
step C, preparing a sample blank by adopting a mold, and compacting for later use;
d, sintering by using a vacuum sintering furnace to prepare a roller sleeve for powder metallurgy;
e, processing an inner hole of the powder metallurgy roller sleeve to remove blank defects, and preheating in a preheating furnace;
f, placing the preheated powder metallurgy roller sleeve in a sand mold, pouring molten steel of a core, solidifying and molding;
step G, placing the blank molded by casting in a heat treatment furnace for heat treatment;
and step H, processing and detecting after the heat treatment is finished until a finished product is obtained.
The technical scheme of the invention is further improved as follows: and B, in the step A, the granularity of the alloy material is 2-3mm, a planetary ball mill is adopted, the liquid medium of the ball mill is one of absolute alcohol, acetone and aviation kerosene, and 3-5% of liquid paraffin is added at the same time.
The technical scheme of the invention is further improved as follows: the ball grinding ball adopted in the step A is a hard alloy ball: the material ratio is 10:1, and the ball milling time is 50-100 h.
The technical scheme of the invention is further improved as follows: the drying temperature in the step B is 150-; simultaneously cooling to a vacuum degree of less than or equal to 10 -3 Mp is performed under the same conditions.
The technical scheme of the invention is further improved as follows: and C, in the compaction process in the step C, the pressure of the sample press is more than or equal to 200MPa, the compaction time is 3-20S, or a cold isostatic pressing method is adopted for compaction.
The technical scheme of the invention is further improved as follows: the sintering process in the step D comprises the following steps: after the temperature is kept at 450 ℃ for 8-20h along 350-.
The technical scheme of the invention is further improved as follows: the preheating temperature in the step E is 500-.
The technical scheme of the invention is further improved as follows: and F, the core molten steel in the step F is made of low alloy steel or iron-based material with enough strength.
The technical scheme of the invention is further improved as follows: the heat treatment mode in the step G is annealing, the annealing temperature is 600-700 ℃, and the heat preservation time is 40-60 h.
Due to the adoption of the technical scheme, the invention has the technical progress that:
the invention applies the powder metallurgy technology to the field of rollers, obtains the powder metallurgy rollers with high fine grain size, high wear resistance and high tissue uniformity through powder preparation, sample blank preparation, sintering, further casting compounding and heat treatment, liquid paraffin is added as a bonding agent in the ball milling stage, so that the prepared powder is compacted and molded, and in the heat preservation process at 350-450 ℃ in the sintering process, in the process of continuously vacuumizing the sintering furnace body, the liquid paraffin is volatilized into gas to be removed, meanwhile, ball milling media such as absolute alcohol steel, acetone, aviation kerosene and the like are added in the ball milling process, so that the oxidation of powder in the ball milling process is avoided, the powder belongs to a semi-molten state in the sintering process, the large-block eutectic carbide appearing in the conventional casting roller is eliminated from the structure, so that the roller has higher accident resistance, wear resistance and structure uniformity compared with the conventional high-speed steel roller.
The adopted sintering process can complete the formation of each phase by keeping the powder in a micro-melting state, and simultaneously avoid the growth of crystal grains and the segregation of components. The powder metallurgy high-speed steel roll can effectively eliminate the defects of component segregation, coarse crystal grains and the like of cast high-speed steel, has uniform structure and fine crystal grains, can better adapt to the working condition characteristics of finished rack high-speed steel, can realize near-net-shape manufacturing, has the casting defects removed to greatly improve the processing allowance compared with the powder metallurgy high-speed steel, and greatly increases the yield of the powder metallurgy high-speed steel; meanwhile, the production cycle of the powder metallurgy high-speed steel process is greatly shortened compared with that of the cast high-speed steel.
Drawings
FIG. 1 is a diagram of a sintering process of the present invention;
fig. 2 is a sintered powder metallurgy high speed steel.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
example 1
The alloy is prepared from waste steel scraps, forged steel stub bars, ferromolybdenum, ferrovanadium and electrode powder as alloy raw materials, wherein the alloy raw material assembly comprises 1.76 of C, 0.93 of Si, 0.56 of B, 0.69 of Mn, 6.23 of Cr, 0.62 of Ni, 4.95 of Mo, 8.32 of V, 0.65 of W, less than or equal to 0.10 of P, less than or equal to 0.1 of S, less than or equal to 1.0 of Nb and the balance of Fe. Adding into a planetary ball mill for ball milling, adding absolute alcohol for ball milling for 60h, adding 3.3% liquid paraffin, filtering with filter paper, drying in a vacuum drying oven at a vacuum degree of 0.001Pa and a drying temperature of 156 ℃ for 45h, cooling to 25 ℃, and discharging. Screening powder with 400 mesh sieve, pressing with a sample press to obtain a sample with roller diameter of 710mm and inner hole of 515mm, and vacuumizing to 10% -4 Sintering in a MPa vacuum furnace, firstly preserving heat for 10h at 400 ℃, then heating to 1280 ℃ at the heating rate of 8 ℃/h, sintering for 100min, cooling to 30 ℃ at the cooling rate of 25 ℃/h, and discharging. Turning the inner hole to expose light, preheating to 550 ℃, then filling into a sand mold with a pre-reserved space, pouring low alloy steel core molten steel, cooling to room temperature, opening the box, and forming into a roller.
Example 2
Using scrap steel, forged steel stub, ferromolybdenum, ferrovanadium and electricityThe superfine powder is an alloy raw material, an alloy raw material assembly comprises C1.83, Si 0.98, B0.62, Mn 0.72, Cr 6.36, Ni 0.78, Mo 5.65, V6.93, W0.78, P is less than or equal to 0.10%, S is less than or equal to 0.1%, Nb is less than or equal to 1.0%, and the balance of Fe is added into a planetary ball mill for ball milling, aviation kerosene is added for ball milling for 55h, liquid paraffin is added for 3.69%, filter paper is adopted for filtering, then the mixture is placed into a vacuum drying furnace for drying, the vacuum degree is 0.00025Pa, the drying temperature is 108 ℃, the drying time is 46h, and the mixture is cooled to 28 ℃ and discharged from the furnace. Screening powder with 600 mesh sieve, pressing with a sample press to obtain a sample with roller body diameter of 715mm and inner hole of 510mm, and vacuumizing to 10% -3 Sintering in a MPa vacuum furnace, firstly preserving heat at 430 ℃ for 10h, then heating to 1290 ℃ at the heating rate of 7 ℃/h for sintering for 105min, and cooling to 25 ℃ at the cooling rate of 26 ℃/h for discharging. Turning the inner hole to expose light, preheating to 560 ℃, then loading into a sand mold with a pre-reserved space, pouring low alloy steel core molten steel, cooling to room temperature, unpacking, and forming into a roller.
Example 3
The alloy material assembly comprises 1.36 percent of C, 0.99 percent of Si, 0.69 percent of B, 0.73 percent of Mn, 5.36 percent of Cr, 0.69 percent of Ni, 7.69 percent of Mo, 7.93 percent of V, 0.79 percent of W, less than or equal to 0.10 percent of P, less than or equal to 0.1 percent of S, less than or equal to 1.0 percent of Nb and the balance of Fe. Adding into a planetary ball mill for ball milling, adding acetone for ball milling for 58h, adding 3.63% liquid paraffin, filtering with filter paper, drying in a vacuum drying oven at a vacuum degree of 0.0002Pa and a drying temperature of 103 ℃ for 43h, cooling to 29 ℃, and discharging. Screening powder with 600 mesh sieve, pressing with a sample press to obtain sample with diameter 723mm and inner hole 515mm, and vacuumizing to 3 × 10 -4 Sintering in a MPa vacuum furnace, firstly preserving heat for 9h at 425 ℃, then heating to 1260 ℃ at the heating rate of 9 ℃/h for sintering for 95min, and cooling to 28 ℃ at the cooling rate of 30 ℃/h for discharging. Turning the inner hole, irradiating light, preheating to 553 ℃, then filling into a sand mold with a reserved space in advance, pouring low alloy steel core molten steel, cooling to room temperature, opening the box, and forming into a roller.
Example 4
Using scrap steel, forged steel stub bars, ferromolybdenum and ferrovanadiumThe electrode powder is an alloy raw material, and an alloy raw material assembly comprises 1.66 percent of C, 0.65 percent of Si, 0.62 percent of B, 0.33 percent of Mn, 3.36 percent of Cr, 0.32 percent of Ni, 6.93 percent of Mo, 7.13 percent of V, 0.25 percent of W, less than or equal to 0.10 percent of P, less than or equal to 0.1 percent of S, less than or equal to 1.0 percent of Nb and the balance of Fe. Adding into a planetary ball mill for ball milling, adding absolute alcohol for ball milling for 60h, adding liquid paraffin for 4.01%, filtering with filter paper, drying in a vacuum drying oven at a vacuum degree of 0.0002Pa and a drying temperature of 103 ℃ for 43h, cooling to 29 ℃, and discharging. Screening powder with 400 mesh sieve, pressing with a sample press to obtain sample with diameter of 718mm and 521mm, and vacuumizing to 2 × 10 -4 Sintering in a MPa vacuum furnace, firstly keeping the temperature at 426 ℃ for 9.5h, then heating to 1290 ℃ at the heating rate of 9.5 ℃/h for sintering for 103min, and cooling to 31 ℃ at the cooling rate of 30 ℃/h for discharging. Turning the inner hole to expose light, preheating to 552 ℃, then placing into a sand mold with a pre-reserved space, pouring low alloy steel core molten steel, cooling to room temperature, opening the box, and forming into a roller.
Example 5
The alloy material assembly comprises 1.73 percent of C, 0.69 percent of Si, 0.65 percent of B, 0.39 percent of Mn, 3.16 percent of Cr, 0.52 percent of Ni, 6.33 percent of Mo, 6.13 percent of V, 0.45 percent of W, less than or equal to 0.10 percent of P, less than or equal to 0.1 percent of S, less than or equal to 1.0 percent of Nb and the balance of Fe. Adding into a planetary ball mill for ball milling, adding aviation kerosene for ball milling for 55h, adding liquid paraffin for 3.65%, filtering with filter paper, drying in a vacuum drying furnace at a vacuum degree of 0.0001Pa and a drying temperature of 108 ℃ for 41h, cooling to 23 ℃, and discharging. Screening powder with 500 mesh sieve, pressing with a sample press to obtain sample with diameter of 790mm and inner hole of 523mm, and vacuumizing to 5 × 10 -4 Sintering in a MPa vacuum furnace, firstly preserving heat at 423 ℃ for 8.5h, then heating to 1296 ℃ at the heating rate of 9.5 ℃/h for sintering for 116min, and cooling to 36 ℃ at the cooling rate of 28 ℃/h for discharging. Turning the inner hole to emit light, preheating to 556 ℃, then filling into a sand mold with a pre-reserved space, pouring low alloy steel core molten steel, cooling to room temperature, opening the box, and forming into a roller.
Example 6
Using scrap steel and forged steelThe stub bar, ferromolybdenum, ferrovanadium and electrode powder are alloy raw materials, and an alloy raw material assembly comprises 1.31 percent of C, 0.80 percent of Si, 0.61 percent of B, 0.53 percent of Mn, 4.1 percent of Cr, 0.32 percent of Ni, 4.33 percent of Mo, 5.13 percent of V, 0.35 percent of W, less than or equal to 0.10 percent of P, less than or equal to 0.1 percent of S, less than or equal to 1.0 percent of Nb and the balance of Fe. Adding into a planetary ball mill for ball milling, adding absolute alcohol for ball milling for 55h, adding liquid paraffin for 3.51%, filtering with filter paper, drying in a vacuum drying oven at a vacuum degree of 0.0001Pa and a drying temperature of 161 ℃ for 43h, cooling to 26 ℃, and discharging. Screening powder with 600 mesh sieve, pressing with a sample press to obtain sample with roller body diameter of 640mm and inner hole of 460mm, and vacuumizing to 6 × 10 -4 Sintering in a MPa vacuum furnace, firstly preserving heat for 9.5h at 395 ℃, then heating to 1291 ℃ at the heating rate of 9.8 ℃/h for sintering for 113min, cooling to 32 ℃ at the cooling rate of 26 ℃/h, and discharging. And turning an inner hole, irradiating light, preheating to 551 ℃, then filling into a sand mold with a reserved space in advance, pouring core molten steel of low alloy steel, cooling to room temperature, unpacking, and forming into a roller.
Example 7
Example 7 is a comparative example, the composition of which is the same as that of example 6, and which is a high-speed steel roll produced by casting.
Example 8
Example 8 is a control, a conventional high speed steel mill roll.
The products of the embodiments 1 to 8 are taken to carry out the tensile mechanical property detection of the sample, and the performance detection execution national standard GB/T228. the detection result is shown in the table 1.
Table 1 EXAMPLES Performance test results
By testing the performance of the developed powder metallurgy roller, the wear resistance of the powder metallurgy roller is higher than that of the conventional high-speed steel, and the accident resistance of the powder metallurgy roller is obviously higher than that of the conventional high-speed steel working roller.
According to the performance detection result, the developed powder metallurgy roller has good wear resistance and accident resistance, can better adapt to the working condition characteristic of steel throwing of a rear section, particularly a finished product rack in the actual use process, is suitable for the short-process rolling line long-roll service rolling characteristic, and can reach more than 3 times of a conventional high-nickel-chromium working roller and more than 1.6 times of conventional high-speed steel in the machine period.
Claims (9)
1. A preparation method of a high-speed steel working roll is characterized by comprising the following steps: the alloy material proportion of the high-speed steel working roll is as follows: c: 1.0-2.30%, Si: 0.5-2.0%, B: 0.5-1.5%, Mn: 0.2-1.2%, P is less than or equal to 0.10%, S is less than or equal to 0.1%, Cr: 1.0-8.0%, Ni: 0.5-1.20%, Mo: 2.0-10.00%, V: 2.00-10.00, W: 0.1 to 5.0 percent of Nb, less than or equal to 1.0 percent of Nb, and the balance of Fe;
the preparation method comprises the following steps:
step A, putting the alloy materials according to the proportion into a ball mill for ball milling;
step B, after the ball milling is finished, the vacuum degree is less than or equal to 10 -3 Heating and drying in a vacuum furnace of Pa, cooling to 30-50 ℃, grinding, and sieving with a sieve of not less than 400 meshes to prepare powder for later use;
step C, preparing a sample blank by adopting a mold, and compacting for later use;
d, sintering by using a vacuum sintering furnace to prepare a roller sleeve for powder metallurgy;
e, processing an inner hole of the powder metallurgy roller sleeve to remove blank defects, and preheating in a preheating furnace;
f, placing the preheated powder metallurgy roller sleeve in a sand mold, pouring molten steel of a core, solidifying and molding;
step G, placing the blank molded by casting in a heat treatment furnace for heat treatment;
and step H, processing and detecting after the heat treatment is finished until a finished product is obtained.
2. The method of manufacturing a high speed steel work roll according to claim 1, wherein: and B, in the step A, the granularity of the alloy material is 2-3mm, a planetary ball mill is adopted, the liquid medium of the ball mill is one of absolute alcohol, acetone and aviation kerosene, and 3-5% of liquid paraffin is added at the same time.
3. The method of manufacturing a high speed steel work roll according to claim 1, wherein: the ball grinding ball adopted in the step A is a hard alloy ball: the material ratio is 10:1, and the ball milling time is 50-100 h.
4. The method of manufacturing a high speed steel work roll according to claim 1, wherein: the drying temperature in the step B is 150-; simultaneously cooling to a vacuum degree of less than or equal to 10 -3 Mp is performed under the same conditions.
5. The method of manufacturing a high speed steel work roll according to claim 1, wherein: and C, in the compaction process in the step C, the pressure of the sample press is more than or equal to 200MPa, the compaction time is 3-20S, or a cold isostatic pressing method is adopted for compaction.
6. The method of manufacturing a high speed steel work roll according to claim 1, wherein: the sintering process in the step D comprises the following steps: after the temperature is kept at 450 ℃ for 8-20h along 350-.
7. The method of manufacturing a high speed steel work roll according to claim 1, wherein: the preheating temperature in the step E is 500-.
8. The method of manufacturing a high speed steel work roll according to claim 1, wherein: and F, the core molten steel in the step F is made of low alloy steel or iron-based material with enough strength.
9. The method of manufacturing a high speed steel work roll according to claim 1, wherein: the heat treatment mode in the step G is annealing, the annealing temperature is 600-700 ℃, and the heat preservation time is 40-60 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210724481.5A CN115041686B (en) | 2022-06-23 | 2022-06-23 | Preparation method of high-speed steel working roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210724481.5A CN115041686B (en) | 2022-06-23 | 2022-06-23 | Preparation method of high-speed steel working roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115041686A true CN115041686A (en) | 2022-09-13 |
| CN115041686B CN115041686B (en) | 2024-02-06 |
Family
ID=83164232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210724481.5A Active CN115041686B (en) | 2022-06-23 | 2022-06-23 | Preparation method of high-speed steel working roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115041686B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4705565A (en) * | 1986-06-25 | 1987-11-10 | Beltz Robert J | High speed steel sintering powder made from reclaimed grinding sludge and objects sintered therefrom |
| US4880461A (en) * | 1985-08-18 | 1989-11-14 | Hitachi Metals, Ltd. | Super hard high-speed tool steel |
| JPH0978177A (en) * | 1995-09-20 | 1997-03-25 | Nippon Steel Corp | Production of material for rolling roll having excellent cracking resistance, and roll material for rolling |
| CN102766824A (en) * | 2012-07-04 | 2012-11-07 | 北京环渤湾高速钢轧辊有限公司 | Abrasion-resistant high-speed-steel roller ring and preparation method thereof |
| WO2020069795A1 (en) * | 2018-08-20 | 2020-04-09 | Höganäs Ab (Publ) | Composition comprising high melting iron alloy powder and modified high speed steel powder, sintered part and manufacturing method thereof, use of the high speed steel powder as additive for sintering |
| CN114381665A (en) * | 2021-12-23 | 2022-04-22 | 中钢集团邢台机械轧辊有限公司 | Medium-thickness plate high-speed steel working roll and manufacturing method thereof |
-
2022
- 2022-06-23 CN CN202210724481.5A patent/CN115041686B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4880461A (en) * | 1985-08-18 | 1989-11-14 | Hitachi Metals, Ltd. | Super hard high-speed tool steel |
| US4705565A (en) * | 1986-06-25 | 1987-11-10 | Beltz Robert J | High speed steel sintering powder made from reclaimed grinding sludge and objects sintered therefrom |
| JPH0978177A (en) * | 1995-09-20 | 1997-03-25 | Nippon Steel Corp | Production of material for rolling roll having excellent cracking resistance, and roll material for rolling |
| CN102766824A (en) * | 2012-07-04 | 2012-11-07 | 北京环渤湾高速钢轧辊有限公司 | Abrasion-resistant high-speed-steel roller ring and preparation method thereof |
| WO2020069795A1 (en) * | 2018-08-20 | 2020-04-09 | Höganäs Ab (Publ) | Composition comprising high melting iron alloy powder and modified high speed steel powder, sintered part and manufacturing method thereof, use of the high speed steel powder as additive for sintering |
| CN114381665A (en) * | 2021-12-23 | 2022-04-22 | 中钢集团邢台机械轧辊有限公司 | Medium-thickness plate high-speed steel working roll and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115041686B (en) | 2024-02-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4066449A (en) | Method for processing and densifying metal powder | |
| CN107760897A (en) | To hydrogenate method of the titanium sponge as raw material manufacture titanium and titanium alloy and its parts | |
| EP2376248B1 (en) | Method for the manufacture of a metal part | |
| EP2990141B1 (en) | Method for producing TiAl components | |
| EP0515018B1 (en) | Prealloyed high-vanadium, cold work tool steel particles and method for producing the same | |
| JPH0118979B2 (en) | ||
| CN101948986B (en) | High-quality alloy steel bar and production process thereof | |
| CN111172470B (en) | High-performance powder metallurgy pressed sintered type semi-high-speed steel and preparation method thereof | |
| US3811878A (en) | Production of powder metallurgical parts by preform and forge process utilizing sucrose as a binder | |
| CN111763839A (en) | Tantalum-tungsten alloy plate machining and forming process capable of improving yield | |
| CN110983152B (en) | Fe-Mn-Si-Cr-Ni based shape memory alloy and preparation method thereof | |
| JPH0475295B2 (en) | ||
| CN115041686B (en) | Preparation method of high-speed steel working roller | |
| CN105773074A (en) | Manufacturing method of molybdenum alloy boat | |
| JP4281857B2 (en) | Sintered tool steel and manufacturing method thereof | |
| CN102605278B (en) | High-temperature alloy and hot isostatic pressing sintering method thereof | |
| JPH08921B2 (en) | Pure iron powder for powder metallurgy with excellent compressibility and magnetic properties | |
| CN107541618A (en) | A kind of hot pressed sintering mould alloy material | |
| JP6930590B2 (en) | Alloy steel powder for powder metallurgy and iron-based mixed powder for powder metallurgy | |
| JPS62224602A (en) | Production of sintered aluminum alloy forging | |
| CN107287472A (en) | The manufacture of cobalt-based containing niobium copper powder metallurgy method cutter blade | |
| RU2285583C2 (en) | Blanks of composition materials production method | |
| DE1936029A1 (en) | Heat-resistant, oxide-free alloys and processes for their manufacture | |
| CN112605388B (en) | Preparation method of high-chromium cast iron alloy composite roller | |
| CN104561773B (en) | Powder metallurgy material for molds and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |