CN117604208A - Manufacturing method of high alloy steel working roller for continuous annealing leveling unit - Google Patents
Manufacturing method of high alloy steel working roller for continuous annealing leveling unit Download PDFInfo
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- CN117604208A CN117604208A CN202311674282.9A CN202311674282A CN117604208A CN 117604208 A CN117604208 A CN 117604208A CN 202311674282 A CN202311674282 A CN 202311674282A CN 117604208 A CN117604208 A CN 117604208A
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- 238000000137 annealing Methods 0.000 title claims abstract description 26
- 229910000851 Alloy steel Inorganic materials 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000011651 chromium Substances 0.000 claims abstract description 16
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 15
- 238000010791 quenching Methods 0.000 claims abstract description 14
- 230000000171 quenching effect Effects 0.000 claims abstract description 14
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 13
- 239000011733 molybdenum Substances 0.000 claims abstract description 13
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 13
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000005496 tempering Methods 0.000 claims abstract description 12
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 239000010703 silicon Substances 0.000 claims abstract description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 6
- 239000011574 phosphorus Substances 0.000 claims abstract description 6
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 6
- 239000011593 sulfur Substances 0.000 claims abstract description 6
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 12
- 238000005242 forging Methods 0.000 claims description 10
- 238000003723 Smelting Methods 0.000 claims description 3
- 238000007747 plating Methods 0.000 abstract description 9
- 238000012423 maintenance Methods 0.000 abstract description 4
- 229910045601 alloy Inorganic materials 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 10
- 238000001816 cooling Methods 0.000 description 7
- 238000000576 coating method Methods 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000010023 transfer printing Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
-
- 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
- C22C38/40—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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention discloses a manufacturing method of a high alloy steel working roll for a continuous annealing leveling unit, which comprises the following chemical components in percentage by weight: 0.70 to 0.90 percent of carbon, 0.60 to 1.20 percent of silicon, 0.30 to 0.60 percent of manganese, less than or equal to 0.020 percent of phosphorus, less than or equal to 0.010 percent of sulfur, 5.10 to 5.80 percent of chromium, 0.50 to 0.80 percent of nickel, 1.10 to 1.50 percent of molybdenum, 0.40 to 0.90 percent of vanadium, and the balance of iron and unavoidable impurities; the final heat treatment adopts surface quenching, cryogenic treatment and low-temperature tempering. According to the invention, through optimizing the alloy content and a final heat treatment mode, the high alloy steel working roll with the surface hardness of the roll body being more than or equal to 95HSD, the depth of a hardening layer being more than or equal to 30mm and particularly high roughness maintenance performance can be finally prepared, and the high alloy steel working roll can replace a chromium plating working roll to be used for a continuous annealing leveling unit.
Description
Technical Field
The invention belongs to the technical field of continuous annealing leveling units, and particularly relates to a manufacturing method of a high alloy steel working roll for a continuous annealing leveling unit.
Background
The surface quality of the automobile plate comprises three parts of surface defect state, cleanliness, surface morphology and the like, is an important aspect for measuring the quality level of the plate and strip, and directly influences the coating quality of the automobile outer plate. The novel two-coating one-baking (2C 1B) coating process reduces the spraying process, reduces the thickness of the coating, and synchronously reduces the covering capacity of the coating to the defects of the surface plate surface, so that the coating has strict requirements on the technical indexes such as the surface reflectivity, color marks, roughness and the like of the plate surface cold-rolled by the continuous annealing leveling unit, and the transverse thickness difference and the like. In addition, in order to improve the stamping and oil storage characteristics of the outer plate of the automobile, the surface of the outer plate of the automobile is required to have a special morphology structure, and the special morphology structure is obtained through roller surface transfer printing of a roller in a cold rolling and leveling process.
The working rolls of the continuous annealing leveling unit are required to have higher wear resistance and better roughness maintenance performance, so the working rolls of the continuous annealing leveling unit at home and abroad are basically chrome plating working rolls at present. Because the chromium plating belongs to the heavy pollution industry, the roller chromium plating process also greatly increases the rolling operation cost and reduces the roller preparation efficiency; meanwhile, when the chromium plating quality of the roller surface fluctuates, strip steel defects such as chromatic aberration marks, roll marks and the like can be generated during rolling, so that the cost is greatly improved, and therefore, the search for the working roller of the continuous annealing leveling unit for replacing the chromium plating working roller is a technical problem which needs to be solved in the field.
Disclosure of Invention
The invention aims to solve the problems and provide a manufacturing method of a high alloy steel working roll for a continuous annealing leveling unit, which has higher wear resistance and better roughness maintenance performance and can replace a chromeplated working roll.
The technical scheme for realizing the aim of the invention is as follows: a manufacturing method of a high alloy steel working roll for a continuous annealing leveling unit comprises the steps of smelting electroslag ingot blanks, forging roller blanks, heat treatment after forging and final heat treatment according to chemical components and weight percentages.
The nickel content of the conventional chromium plating working roller is not more than 0.40%, the molybdenum content is not more than 0.80%, and the vanadium content is not more than 0.30%; the applicant found through a number of experiments that: the molybdenum, vanadium and nickel contents are properly improved, and simultaneously, the high wear resistance and the high roughness retention performance can be obtained by matching with optimized final heat treatment, so that the chromium plating working roll can be replaced for a continuous annealing leveling unit; however, the molybdenum, vanadium, nickel content must not be too high, which would otherwise affect the grinding performance, because the temper mill work rolls are large in gauge (roll body diameter is typically above 500 mm), and too high an alloy content makes it difficult to grind.
Therefore, the high alloy steel working roll for the continuous annealing leveling unit comprises the following chemical components in percentage by weight: 0.70 to 0.90 percent of carbon, 0.60 to 1.20 percent of silicon, 0.30 to 0.60 percent of manganese, less than or equal to 0.020 percent of phosphorus, less than or equal to 0.010 percent of sulfur, 5.10 to 5.80 percent of chromium, 0.50 to 0.80 percent of nickel, 1.10 to 1.50 percent of molybdenum, 0.40 to 0.90 percent of vanadium, and the balance of iron and unavoidable impurities.
Further, the high alloy steel working roll for the continuous annealing leveling unit preferably comprises the following chemical components in percentage by weight: 0.70 to 0.90 percent of carbon, 0.60 to 1.20 percent of silicon, 0.30 to 0.60 percent of manganese, less than or equal to 0.020 percent of phosphorus, less than or equal to 0.010 percent of sulfur, 5.30 to 5.60 percent of chromium, 0.60 to 0.70 percent of nickel, 1.20 to 1.40 percent of molybdenum, 0.55 to 0.75 percent of vanadium, and the balance of iron and unavoidable impurities.
The final heat treatment of the conventional high alloy steel working roll adopts surface quenching and high temperature tempering; the applicant found through a number of experiments that: the hardness of the working roller obtained by the conventional final heat treatment mode is low for the optimized high alloy steel material, so that the wear resistance is poor; therefore, the surface quenching treatment, the cryogenic treatment and the low-temperature tempering treatment are adopted in the final heat treatment mode, so that higher hardness is ensured to be obtained, and the wear resistance is better.
The surface quenching treatment temperature is 1000-1060 ℃, and the surface quenching treatment time is 1-3 h.
The cryogenic treatment temperature is-150 to-120 ℃, and the cryogenic treatment time is 4 to 5 hours.
The low-temperature tempering treatment temperature is 100-150 ℃, and the low-temperature tempering treatment time is 60-90 h.
The invention has the positive effects that: according to the invention, on one hand, the alloy content is optimized (the molybdenum, vanadium and nickel content is properly improved), and on the other hand, the final heat treatment (surface quenching treatment, deep cooling treatment and low-temperature tempering treatment) is optimized, so that the high alloy steel working roll with the surface hardness of the roll body being more than or equal to 95HSD, the depth of a hardening layer being more than or equal to 30mm and particularly higher roughness maintenance performance can be finally prepared, and the high alloy steel working roll can be used for a continuous annealing leveling unit instead of a chromium plating working roll.
Detailed Description
Example 1
The manufacturing method of the high alloy steel working roll for the continuous annealing leveling unit comprises the following steps:
s1: smelting electroslag ingot blanks by adopting a conventional method according to the following chemical components in percentage by weight: carbon 0.80%, silicon 0.90%, manganese 0.45%, phosphorus not more than 0.020%, sulfur not more than 0.010%, chromium 5.50%, nickel 0.65%, molybdenum 1.30%, vanadium 0.65%, and the balance iron and unavoidable impurities.
S2: forging the electroslag ingot blank obtained in the step S1 into a roller blank.
Wherein: the forging heating temperature is 1150-1180 ℃, and the initial forging temperature is 1120-1150 ℃.
S3: the post-forging heat treatment specifically comprises:
s31: normalizing by waste heat after forging.
After forging, firstly air-cooling to 450+/-5 ℃, then air-cooling to 280+/-5 ℃, and feeding into a furnace for isothermal for 8 hours.
S32: and (5) normalizing treatment.
Heating to 1030+/-5 ℃ for isothermal 8 hours, discharging and air cooling.
S33: and (5) spheroidizing annealing.
Heating to 580+ -5deg.C for 4h, heating to 870+ -5deg.C (isothermal coefficient is 2 min/mm), cooling to 700+ -5deg.C (isothermal coefficient is 2 min/mm), cooling to 450 deg.C or less, and discharging and air cooling.
S4: and (5) final heat treatment.
S41: and carrying out surface quenching treatment for 2 hours at the temperature of 1030+/-5 ℃ by adopting a double-frequency three-induction-coil quenching process.
S42: cryogenic treatment is carried out for 4 hours at the temperature of minus 135 plus or minus 5 ℃.
S43: and carrying out one low-temperature tempering treatment at the temperature of 125+/-5 ℃ for 75 hours.
Example 2 to example 3
The manufacturing method of the high alloy steel work roll for the continuous annealing leveling unit of examples 2 to 3 is the same as that of example 1, except that: the chemical components and weight percentages are shown in Table 1.
Example 4 to example 5
The chemical composition and weight percentage of the high alloy steel work rolls for continuous annealing leveling machine set of examples 4 to 5 are the same as those of example 1, and the manufacturing method is basically the same as example 1, except that: the final heat treatment process parameters are specifically shown in table 1.
The high alloy steel working rolls for continuous annealing leveling units prepared in each example were tested for their relevant properties, and are shown in table 1.
TABLE 1
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Carbon (C) | 0.80% | 0.85% | 0.75% | 0.80% | 0.80% |
| Silicon (Si) | 0.90% | 0.95% | 0.85% | 0.90% | 0.90% |
| Manganese (Mn) | 0.45% | 0.50% | 0.40% | 0.45% | 0.45% |
| Chromium (Cr) | 5.50% | 5.60% | 5.30% | 5.50% | 5.50% |
| Nickel (Ni) | 0.65% | 0.70% | 0.60% | 0.65% | 0.65% |
| Molybdenum (Mo) | 1.30% | 1.40% | 1.20% | 1.30% | 1.30% |
| Vanadium (V) | 0.65% | 0.75% | 0.55% | 0.65% | 0.65% |
| Surface quenching treatment temperature | 1030±5℃ | 1030±5℃ | 1030±5℃ | 1010±5℃ | 1050±5℃ |
| Cryogenic treatment temperature | -135±5℃ | -135±5℃ | -135±5℃ | -125±5℃ | -145±5℃ |
| Low temperature tempering treatment temperature | 125±5℃ | 125±5℃ | 125±5℃ | 110±5℃ | 140±5℃ |
| Hardness of roll body surface | 96～97HSD | 97～98HSD | 95～96HSD | 95～96HSD | 97～98HSD |
| The depth of the hardening layer is more than or equal to 30mm | 35mm | 37mm | 32mm | 33mm | 36mm |
| Original roughness Ra/. Mu.m | 2.6 | 2.7 | 2.5 | 2.6 | 2.7 |
| Roughness Ra/μm after a rolling cycle | 2.3 | 2.2 | 2.0 | 2.2 | 2.4 |
| Roughness decay amplitude of rolling cycle/mu m | 0.3 | 0.5 | 0.5 | 0.4 | 0.3 |
Comparative example 1
The working rolls of this comparative example were identical in chemical composition and weight percent to example 1, and the manufacturing process was essentially identical to example 1, except that the final heat treatment at step S4 was:
and carrying out surface quenching treatment for 2 hours at the temperature of 1030+/-5 ℃ by adopting a double-frequency three-induction-coil quenching process.
High temperature tempering treatment is carried out for 3 times at 525+/-5 ℃ for 25 hours each time.
Comparative example 2
The working roll of comparative example 2 was manufactured in the same manner as in example 1, except that: nickel content 0.40%, molybdenum content 0.80%, vanadium content 0.30%.
Comparative example 3
The working roll of comparative example 2 was manufactured in the same manner as in example 1, except that: nickel content 0.25%, molybdenum content 0.60%, vanadium content 0.25%.
The relevant properties of the work rolls prepared in each comparative example were tested and are shown in Table 2.
TABLE 2
| Example 1 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Hardness of roll body surface | 96～97HSD | 86～90HSD | 93～94HSD | 92～93HSD |
| Depth of hardening layer | 35mm | 30mm | 28mm | 25mm |
| Original surface roughness Ra/. Mu.m | 2.6 | 2.4 | 2.3 | 2.2 |
| Roughness Ra/μm after a rolling cycle | 2.3 | 2.0 | 1.2 | 0.8 |
| Roughness decay amplitude of rolling cycle/mu m | 0.3 | 0.4 | 1.1 | 1.4 |
Claims (5)
1. A manufacturing method of a high alloy steel working roll for a continuous annealing leveling unit comprises the steps of smelting electroslag ingot blanks, forging roller blanks, heat treatment after forging and final heat treatment according to chemical components and weight percentages; the method is characterized in that: the chemical components and weight percentages are as follows: 0.70 to 0.90 percent of carbon, 0.60 to 1.20 percent of silicon, 0.30 to 0.60 percent of manganese, less than or equal to 0.020 percent of phosphorus, less than or equal to 0.010 percent of sulfur, 5.10 to 5.80 percent of chromium, 0.50 to 0.80 percent of nickel, 1.10 to 1.50 percent of molybdenum, 0.40 to 0.90 percent of vanadium, and the balance of iron and unavoidable impurities; the final heat treatment includes surface quenching treatment, cryogenic treatment and low temperature tempering treatment.
2. The method for manufacturing the high alloy steel work roll for the continuous annealing leveling unit according to claim 1, wherein the method comprises the following steps: the chemical components and weight percentages are as follows: 0.70 to 0.90 percent of carbon, 0.60 to 1.20 percent of silicon, 0.30 to 0.60 percent of manganese, less than or equal to 0.020 percent of phosphorus, less than or equal to 0.010 percent of sulfur, 5.30 to 5.60 percent of chromium, 0.60 to 0.70 percent of nickel, 1.20 to 1.40 percent of molybdenum, 0.55 to 0.75 percent of vanadium, and the balance of iron and unavoidable impurities.
3. The method for manufacturing the high alloy steel work roll for the continuous annealing leveling unit according to claim 1 or 2, characterized in that: the surface quenching treatment temperature is 1000-1060 ℃, and the surface quenching treatment time is 1-3 h.
4. The method for manufacturing the high alloy steel work roll for the continuous annealing leveling unit according to claim 1 or 2, characterized in that: the cryogenic treatment temperature is-150 to-120 ℃, and the cryogenic treatment time is 4 to 5 hours.
5. The method for manufacturing the high alloy steel work roll for the continuous annealing leveling unit according to claim 1 or 2, characterized in that: the low-temperature tempering treatment temperature is 100-150 ℃, and the low-temperature tempering treatment time is 60-90 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311674282.9A CN117604208A (en) | 2023-12-07 | 2023-12-07 | Manufacturing method of high alloy steel working roller for continuous annealing leveling unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311674282.9A CN117604208A (en) | 2023-12-07 | 2023-12-07 | Manufacturing method of high alloy steel working roller for continuous annealing leveling unit |
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| CN117604208A true CN117604208A (en) | 2024-02-27 |
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