CN104789873A - Rolling mill segmentation wheel and regeneration manufacturing process thereof - Google Patents
Rolling mill segmentation wheel and regeneration manufacturing process thereof Download PDFInfo
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- CN104789873A CN104789873A CN201510201358.5A CN201510201358A CN104789873A CN 104789873 A CN104789873 A CN 104789873A CN 201510201358 A CN201510201358 A CN 201510201358A CN 104789873 A CN104789873 A CN 104789873A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/28—Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- 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
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium 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
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a rolling mill segmentation wheel which is prepared from the following components in percentage by mass: 1.45-1.70% of C, less than or equal to 0.40% of Si, 0.3-0.5% of Mn, less than or equal to 0.030% of S, less than or equal to 0.030% of P, 11.00-12.50% of Cr, 0.5-0.8% of W, 0.05-0.12% of RE, 0.15-0.30% of V, 0.40-0.60% of Mo, less than or equal to 0.25% of allowable residual content of Ni, less than or equal to 0.30% of allowable residual content of Cu, and the balance of Fe. The regeneration manufacturing process of the rolling mill segmentation wheel comprises the following steps: smelting waste segmentation wheels in an induction electromagnetic furnace, refining the smelted segmentation wheels in a ladle furnace, performing VC/RH vacuum degassing on the smelted segmentation wheel, manufacturing a segmentation wheel mold by using a low-temperature wax-based mold material, and removing a casting system, thereby obtaining a segmentation wheel. The rolling mill segmentation wheel has the advantages of long service life and the like.
Description
Technical field
The invention belongs to the preparation of Mill Parts slitting wheel and Remanufacture field thereof, specifically relate to a kind of milling train slitting wheel and Remanufacture technique thereof.
Background technology
Cutting guide case is the key part realizing Bar Wire Product splitting rolling, slitting wheel is wherein core component, splitting rolling is one-strand roller comparatively, its output is high, save energy, reduce costs, as two slitting wheels can improve output 170%, energy consumption reduces by 30%, cost reduces by 30%, three slitting wheels can improve output 210%, energy consumption reduces by 45%, cost reduces by 45%, but, slitting wheel work under bad environment, cutting blade contacts with the high temperature rolled piece of about 1000 DEG C, water coolant makes slitting wheel be in alternation rapid heat cycle state, the stocking of advancing at a high speed can make cutting blade produce strong wear, in addition, cutting blade also will bear the shock load from rolled piece, make the work-ing life of slitting wheel short, consumption is large, change frequent, and become one of bottleneck of restriction steel production at present, in work, slitting wheel directly contacts with red steel, its key property is that its working face of requirement should have good wear resistance, hot strength etc., to improve its work-ing life.At present in actual production, many utilizations high-grade alloy steel is as slitting wheel material, its advantage is that wear resistance is good, hot strength is high, slitting wheel material as Shoudu Iron and Steel Co is W6Mo5Cr4V2, but this material is more difficult in thermal treatment and the processing of machine mill, the slitting wheel material that Anhui Kai get Li machine die company limited uses is Cr6W2Si, and this material is usually used in the machine-use blade cutting soft metal such as copper, aluminium, and wear resistance is not enough; Our company's slitting wheel material used is Cr12MoV, this material has the advantages such as high-wearing feature, high corrosion resistance and high-dimensional stability, but because slitting wheel uses for a long time at high operating temperatures, still there are certain wearing and tearing, at present, only there is indivedual producer to adopt the methods such as such as surface coating to improve its work-ing life, but also do not adopt the technology such as microalloying, slitting wheel reparation and Remanufacture to improve the method in its work-ing life.
Summary of the invention
The present invention is for avoiding the weak point that exists in above-mentioned prior art, providing a kind of milling train slitting wheel and Remanufacture technique thereof, with solve slitting wheel under arms time serious wear, life-span short, replace the problems such as frequent.
The present invention be technical solution problem by the following technical solutions.
A kind of milling train slitting wheel, is characterized in: each component formation by mass percentage of this milling train slitting wheel is: C1.45% ~ 1.70%, Si≤0.40%, Mn0.3% ~ 0.5%, S≤0.030%, P≤0.030%, Cr 11.00% ~ 12.50%, W 0.5% ~ 0.8%, RE 0.05% ~ 0.12%, V 0.15 ~ 0.30%, Mo 0.40% ~ 0.60%, Ni allows residual content≤0.25%, and Cu allows residual content≤0.30%, and all the other are Fe.
The Remanufacture technique of milling train slitting wheel of the present invention is as follows:
Step one: smelted in inductive electromagnetic stove by waste and old slitting wheel, add the pig iron, steel scrap etc., realizes component and tentatively regulates and obtain following composition: C1.00% ~ 1.20%, Si≤0.40%, Mn 0.2% ~ 0.4%, S≤0.045%, P≤0.045%, Cr≤10%, V≤0.15%, Mo≤0.30%, Ni allows residual content≤0.25%, Cu allows residual content≤0.30%, and all the other are Fe;
Step 2: the slitting wheel after step one being smelted is at ladle furnace refining, in ladle furnace, take off S, de-O, de-P and add alloying element and rare earth element, trimming, obtain following composition: C1.45% ~ 1.70%, Si≤0.40%, Mn 0.3% ~ 0.5%, S≤0.030%, P≤0.030%, Cr 11.00% ~ 12.50%, W 0.5% ~ 0.8%, RE 0.05% ~ 0.12%, V 0.15 ~ 0.30%, Mo 0.40% ~ 0.60%, Ni allow residual content≤0.25%, Cu allows residual content≤0.30%, and all the other are Fe;
Step 3: the slitting wheel after step 2 refining is carried out VD/RH vacuum outgas, vacuum outgas and trimming in VD/RH stove, obtain following composition: C1.45% ~ 1.70%, Si≤0.40%, Mn0.3% ~ 0.5%, S≤0.030%, P≤0.030%, Cr 11.00% ~ 12.50%, W 0.5% ~ 0.8%, RE 0.05% ~ 0.12%, V 0.15 ~ 0.30%, Mo 0.40% ~ 0.60%, Ni allows residual content≤0.25%, Cu allows residual content≤0.30%, and all the other are Fe;
Step 4: make slitting wheel model with low-temperature wax basic mode material, slitting wheel model shell is obtained with silica-water glass composite shell process for making shell, in silicon sol-water glass composite model Shell Preparation process, layer 2-4 silicon sol first smeared by slitting wheel model, be coated with 3-5 layer water glass and after steam dewaxing, obtain slitting wheel model shell;
Step 5: roasting slitting wheel model shell, maturing temperature is 950-1000 DEG C, soaking time is 40 minutes, after roasting terminates, and is poured in slitting wheel model shell by the compound that step 3 is prepared and pours into a mould, the tapping temperature of molten iron is 1600 ~ 1620 DEG C, teeming temperature is 1530 ~ 1540 DEG C, and slitting wheel model shell temperature is 450 ~ 550 DEG C, after cast, the slitting wheel made is naturally cooled to room temperature, after removing gating system, obtains slitting wheel.
The present invention compared with prior art, has following difference:
The use material of the former slitting wheel of our company is Cr12MoV, the hardness of former slitting wheel is generally HRC45 ~ 60, microalloy treatment has been carried out in starting material, because alloying element tungsten has high strength, high rigidity, the feature such as high-wearing feature and high-melting-point, and its hot strength is good, therefore in step 2, tungsten adds in steel can form carbide with carbon, and carbide has high hardness, wear resistance and insoluble, therefore, in order to improve the wear resistance of slitting wheel, the technology of the present invention with the addition of alloying element tungsten in fusion process, namely on the basis of former slitting wheel material C r12MoV, the W that mass percent is 0.5% ~ 0.8% is added, to improve its wear resistance and red hardness, through inspection, a small amount of tungsten adds after in Cr12MoV, the average hardness of slitting wheel reaches HRC60 ~ 63, its wear resistance can be improved by a relatively large margin, increase its work-ing life, add the RE of 0.05% ~ 0.12% in the alloy, there is evolution molten steel, suppress S, P and low melting point inclususions are at Grain Boundary Segregation, strengthening crystal boundary, strip sulphidic conversion can be made to be spherical simultaneously, improve toughness and the wear resistance of steel, improve the anti-fatigue performance of steel.
The present invention has following beneficial effect: the wear resistance significantly improving slitting wheel, and after adding alloying element, slitting wheel changed by former 1 day one, became and changed for about 1.5 days one, reduce the maintenance cost of slitting wheel, extend its work-ing life.
Embodiment
The present invention be technical solution problem by the following technical solutions.
A kind of milling train slitting wheel, is characterized in: each component formation by mass percentage of this milling train slitting wheel is: C1.45% ~ 1.70%, Si≤0.40%, Mn0.3% ~ 0.5%, S≤0.030%, P≤0.030%, Cr 11.00% ~ 12.50%, W 0.5% ~ 0.8%, RE 0.05% ~ 0.12%, V 0.15 ~ 0.30%, Mo 0.40% ~ 0.60%, Ni allows residual content≤0.25%, and Cu allows residual content≤0.30%, and all the other are Fe.
The Remanufacture technique of milling train slitting wheel of the present invention is as follows:
Step one: smelted in inductive electromagnetic stove by waste and old slitting wheel, add the pig iron, steel scrap etc., realizes component and tentatively regulates and obtain following composition: C1.00% ~ 1.20%, Si≤0.40%, Mn 0.2% ~ 0.4%, S≤0.045%, P≤0.045%, Cr≤10%, V≤0.15%, Mo≤0.30%, Ni allows residual content≤0.25%, Cu allows residual content≤0.30%, and all the other are Fe;
Step 2: the slitting wheel after step one being smelted is at ladle furnace refining, in ladle furnace, take off S, de-O, de-P and add alloying element and rare earth element, trimming, obtain following composition: C1.45% ~ 1.70%, Si≤0.40%, Mn 0.3% ~ 0.5%, S≤0.030%, P≤0.030%, Cr 11.00% ~ 12.50%, W 0.5% ~ 0.8%, RE 0.05% ~ 0.12%, V 0.15 ~ 0.30%, Mo 0.40% ~ 0.60%, Ni allow residual content≤0.25%, Cu allows residual content≤0.30%, and all the other are Fe;
Step 3: the slitting wheel after step 2 refining is carried out VD/RH vacuum outgas, vacuum outgas and trimming in VD/RH stove, obtain following composition: C1.45% ~ 1.70%, Si≤0.40%, Mn0.3% ~ 0.5%, S≤0.030%, P≤0.030%, Cr 11.00% ~ 12.50%, W 0.5% ~ 0.8%, RE 0.05% ~ 0.12%, V 0.15 ~ 0.30%, Mo 0.40% ~ 0.60%, Ni allows residual content≤0.25%, Cu allows residual content≤0.30%, and all the other are Fe;
Step 4: make slitting wheel model with low-temperature wax basic mode material, slitting wheel model shell is obtained with silica-water glass composite shell process for making shell, in silicon sol-water glass composite model Shell Preparation process, layer 2-4 silicon sol first smeared by slitting wheel model, be coated with 3-5 layer water glass and after steam dewaxing, obtain slitting wheel model shell;
Step 5: roasting slitting wheel model shell, maturing temperature is 950-1000 DEG C, soaking time is 40 minutes, after roasting terminates, and is poured in slitting wheel model shell by the compound that step 3 is prepared and pours into a mould, the tapping temperature of molten iron is 1600 ~ 1620 DEG C, teeming temperature is 1530 ~ 1540 DEG C, and slitting wheel model shell temperature is 450 ~ 550 DEG C, after cast, the slitting wheel made is naturally cooled to room temperature, after removing gating system, obtains slitting wheel.
The object of the invention is in order to solve slitting wheel under arms time serious wear, life-span short, replace the problems such as frequent, for this reason, the basis of former slitting wheel material C r12MoV alloy is added the metallic element tungsten of 0.5% ~ 0.8%, adds the RE of 0.05% ~ 0.12% simultaneously, significantly improve work-ing life.
Embodiment 1
Step one: smelted in inductive electromagnetic stove by waste and old slitting wheel, add the pig iron, steel scrap etc., realizes component and tentatively regulates and obtain following composition: C 1.00%, Si 0.40%, Mn 0.2%, S 0.045%, P 0.045%, Cr 10%, V 0.15%, Mo 0.30%, Ni 0.25%, Cu 0.30%, all the other are Fe;
Step 2: the slitting wheel after step one being smelted, at ladle furnace refining, takes off S, de-O, de-P and adds alloying element and rare earth element, trimming in ladle furnace, obtain following composition: C 1.45%, Si 0.40%, Mn 0.3%, S 0.030%, P 0.030%, Cr 11.00%, W 0.5%, RE 0.05%, V 0.15%, Mo 0.40%, Ni 0.25%, Cu 0.30%, all the other are Fe;
Step 3: the slitting wheel after step 2 refining is carried out VD/RH vacuum outgas, vacuum outgas and trimming in VD/RH stove, obtain following composition: C 1.45%, Si 0.40%, Mn 0.3%, S 0.030%, P 0.030%, Cr 11.00%, W 0.5%, RE 0.05%, V 0.15%, Mo 0.40%, Ni 0.25%, Cu 0.30%, all the other are Fe;
Step 4: make slitting wheel model with low-temperature wax basic mode material, slitting wheel model shell is obtained with silica-water glass composite shell process for making shell, in silicon sol-water glass composite model Shell Preparation process, slitting wheel model is first smeared 2 layers of silicon sol, be coated with 3 layers of water glass and after steam dewaxing, obtain slitting wheel model shell;
Step 5: roasting slitting wheel model shell, maturing temperature is 950 DEG C, soaking time is 40 minutes, after roasting terminates, and is poured in slitting wheel model shell by the compound that step 3 is prepared and pours into a mould, the tapping temperature of molten iron is 1600 DEG C, teeming temperature is 1530 DEG C, and slitting wheel model shell temperature is 450 DEG C, after cast, the slitting wheel made is naturally cooled to room temperature, after removing gating system, obtains slitting wheel.
Performance test
Significantly improve the wear resistance of slitting wheel, after adding alloying element, slitting wheel changed by former 1 day one, became and changed for 2 days one, reduce the maintenance cost of slitting wheel, extend its work-ing life.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. a milling train slitting wheel, is characterized in that: each component formation by mass percentage of this milling train slitting wheel is: C1.45% ~ 1.70%, Si≤0.40%, Mn0.3% ~ 0.5%, S≤0.030%, P≤0.030%, Cr 11.00% ~ 12.50%, W 0.5% ~ 0.8%, RE 0.05% ~ 0.12%, V 0.15 ~ 0.30%, Mo 0.40% ~ 0.60%, Ni allows residual content≤0.25%, and Cu allows residual content≤0.30%, and all the other are Fe.
2. a kind of milling train slitting wheel according to claim 1, is characterized in that: the Remanufacture technique of described milling train slitting wheel is as follows:
Step one: smelted in inductive electromagnetic stove by waste and old slitting wheel, add the pig iron, steel scrap etc., realizes component and tentatively regulates and obtain following composition: C1.00% ~ 1.20%, Si≤0.40%, Mn 0.2% ~ 0.4%, S≤0.045%, P≤0.045%, Cr≤10%, V≤0.15%, Mo≤0.30%, Ni allows residual content≤0.25%, Cu allows residual content≤0.30%, and all the other are Fe;
Step 2: the slitting wheel after step one being smelted is at ladle furnace refining, in ladle furnace, take off S, de-O, de-P and add alloying element and rare earth element, trimming, obtain following composition: C1.45% ~ 1.70%, Si≤0.40%, Mn 0.3% ~ 0.5%, S≤0.030%, P≤0.030%, Cr 11.00% ~ 12.50%, W 0.5% ~ 0.8%, RE 0.05% ~ 0.12%, V 0.15 ~ 0.30%, Mo 0.40% ~ 0.60%, Ni allow residual content≤0.25%, Cu allows residual content≤0.30%, and all the other are Fe;
Step 3: the slitting wheel after step 2 refining is carried out VD/RH vacuum outgas, vacuum outgas and trimming in VD/RH stove, obtain following composition: C1.45% ~ 1.70%, Si≤0.40%, Mn0.3% ~ 0.5%, S≤0.030%, P≤0.030%, Cr 11.00% ~ 12.50%, W 0.5% ~ 0.8%, RE 0.05% ~ 0.12%, V 0.15 ~ 0.30%, Mo 0.40% ~ 0.60%, Ni allows residual content≤0.25%, Cu allows residual content≤0.30%, and all the other are Fe;
Step 4: make slitting wheel model with low-temperature wax basic mode material, slitting wheel model shell is obtained with silica-water glass composite shell process for making shell, in silicon sol-water glass composite model Shell Preparation process, layer 2-4 silicon sol first smeared by slitting wheel model, be coated with 3-5 layer water glass and after steam dewaxing, obtain slitting wheel model shell;
Step 5: roasting slitting wheel model shell, maturing temperature is 950-1000 DEG C, soaking time is 40 minutes, after roasting terminates, and is poured in slitting wheel model shell by the compound that step 3 is prepared and pours into a mould, the tapping temperature of molten iron is 1600 ~ 1620 DEG C, teeming temperature is 1530 ~ 1540 DEG C, and slitting wheel model shell temperature is 450 ~ 550 DEG C, after cast, the slitting wheel made is naturally cooled to room temperature, after removing gating system, obtains slitting wheel.
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Cited By (4)
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| CN106086690A (en) * | 2016-08-16 | 2016-11-09 | 合肥东方节能科技股份有限公司 | A kind of high finishing mill alloy slitting wheel and Remanufacture technique thereof |
| CN106086696A (en) * | 2016-08-22 | 2016-11-09 | 合肥东方节能科技股份有限公司 | A kind of energetic ion slitting wheel alloy material and preparation method thereof |
| CN106181219A (en) * | 2016-08-16 | 2016-12-07 | 合肥东方节能科技股份有限公司 | A kind of high-performance finishing mill slitting wheel using method |
| CN108950373A (en) * | 2018-08-13 | 2018-12-07 | 林州凤宝管业有限公司 | A kind of high finishing mill alloy slitting wheel and its Remanufacture technique |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086690A (en) * | 2016-08-16 | 2016-11-09 | 合肥东方节能科技股份有限公司 | A kind of high finishing mill alloy slitting wheel and Remanufacture technique thereof |
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| CN106086690B (en) * | 2016-08-16 | 2018-02-09 | 合肥东方节能科技股份有限公司 | A kind of high finishing mill alloy slitting wheel and its Remanufacture technique |
| CN106086696A (en) * | 2016-08-22 | 2016-11-09 | 合肥东方节能科技股份有限公司 | A kind of energetic ion slitting wheel alloy material and preparation method thereof |
| CN108950373A (en) * | 2018-08-13 | 2018-12-07 | 林州凤宝管业有限公司 | A kind of high finishing mill alloy slitting wheel and its Remanufacture technique |
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