CN111607743B - High-vanadium W6+ Co high-speed steel material and preparation method thereof - Google Patents
High-vanadium W6+ Co high-speed steel material and preparation method thereof Download PDFInfo
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- 229910000997 High-speed steel Inorganic materials 0.000 title claims abstract description 62
- 239000000463 material Substances 0.000 title claims abstract description 41
- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000010791 quenching Methods 0.000 claims abstract description 27
- 230000000171 quenching effect Effects 0.000 claims abstract description 27
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 11
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 8
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 8
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 30
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 239000010959 steel Substances 0.000 claims description 25
- 238000005242 forging Methods 0.000 claims description 19
- 238000003723 Smelting Methods 0.000 claims description 18
- 238000000137 annealing Methods 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000007670 refining Methods 0.000 claims description 15
- 238000005496 tempering Methods 0.000 claims description 12
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 9
- 230000005496 eutectics Effects 0.000 claims description 9
- 229910001349 ledeburite Inorganic materials 0.000 claims description 9
- 238000005098 hot rolling Methods 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 238000009849 vacuum degassing Methods 0.000 claims description 8
- 229910008455 Si—Ca Inorganic materials 0.000 claims 2
- 238000012545 processing Methods 0.000 abstract description 6
- 238000009628 steelmaking Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 17
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 8
- 229910017052 cobalt Inorganic materials 0.000 description 7
- 239000010941 cobalt Substances 0.000 description 7
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 7
- 229910052918 calcium silicate Inorganic materials 0.000 description 6
- 239000000378 calcium silicate Substances 0.000 description 6
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- MGRWKWACZDFZJT-UHFFFAOYSA-N molybdenum tungsten Chemical compound [Mo].[W] MGRWKWACZDFZJT-UHFFFAOYSA-N 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000001247 metal acetylides Chemical group 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- -1 tungsten carbides Chemical class 0.000 description 1
Classifications
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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
- C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
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- 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
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- 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
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- 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
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Abstract
The invention provides a novel high-vanadium W6+ Co high-speed steel material and a preparation method thereof, belonging to the technical field of steel making. A novel high-vanadium W6+ Co high-speed steel material comprises the following components in percentage by mass: 1 to 1.07 percent of C, 0.3 to 0.4 percent of Si, 0.2 to 0.4 percent of Mn, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, 3.80 to 4.20 percent of Cr, 2.45 to 2.60 percent of V, 5.00 to 5.20 percent of Mo, 6.00 to 6.20 percent of W, 1.80 to 2.20 percent of Co and the balance of Fe. The invention has the advantages of higher wear resistance, red hardness and other processing performances, and the quenching hardness can reach 67 +/-1 HRC.
Description
Technical Field
The invention belongs to the technical field of steel making, and particularly relates to a novel high-vanadium W6+ Co high-speed steel material and a preparation method thereof.
Background
In the existing produced materials, the tungsten-molybdenum high-speed steel for manufacturing cutting tools comprises the following chemical components in percentage by weight: 0.91-0.95, W: 5.80-6.20, Mo: 4.80-5.20, Cr: 3.80-4.20, V: 1.80-2.10, Co: 1.80-2.20, Mn: 0.20 to 0.40, Si: 0.30-0.40, S: less than or equal to 0.02, P: not more than 0.03, the balance being Fe, and the hardness after quenching and tempering is 65 +/-1 HRC.
At present, high-speed steel with the hardness of 66 +/-1 HRC is often adopted when the cutting tool is prepared, materials which can meet the requirement internationally are tungsten-molybdenum high-speed steel M35 and molybdenum high-speed steel M42 respectively, and the two materials contain higher cobalt element and are expensive and 2.5 times and 5 times of M2 respectively. Therefore, it is necessary to develop a high-speed steel with high hardness and high wear resistance, which has good processing performance and high cost performance.
Disclosure of Invention
The invention aims to solve the problems in the prior art, provides a novel high-vanadium W6+ Co high-speed steel material which has higher processing performances such as wear resistance, red hardness and the like, and the quenching hardness can reach 67 +/-1 HRC.
The first object of the present invention can be achieved by the following technical solutions:
a novel high-vanadium W6+ Co high-speed steel material is characterized by comprising the following components in percentage by mass: 1 to 1.07 percent of C, 0.3 to 0.4 percent of Si, 0.2 to 0.4 percent of Mn, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, 3.80 to 4.20 percent of Cr, 2.45 to 2.60 percent of V, 5.00 to 5.20 percent of Mo, 6.00 to 6.20 percent of W, 1.80 to 2.20 percent of Co and the balance of Fe.
The invention also aims to solve the problems in the prior art, and provides a preparation method of the novel high-vanadium W6+ Co high-speed steel material, which obtains higher processing performances such as wear resistance, red hardness and the like by improving the proportion of alloy raw materials and optimizing the production process on the premise of keeping high toughness, and the quenching hardness can reach 67 +/-1 HRC.
The second object of the present invention can be achieved by the following technical solutions:
a preparation method of a novel high-vanadium W6+ Co high-speed steel material is characterized by comprising the following steps:
s1, mixing the following raw materials: selecting raw materials according to the weight ratio of each element in the high-speed steel, wherein the high-speed steel material comprises the following components in percentage by mass: 1 to 1.07 percent of C, 0.3 to 0.4 percent of Si, 0.2 to 0.4 percent of Mn, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, 3.80 to 4.20 percent of Cr, 2.45 to 2.60 percent of V, 5.00 to 5.20 percent of Mo, 6.00 to 6.20 percent of W, 1.80 to 2.20 percent of Co and the balance of Fe;
s2, smelting: smelting the raw materials into molten steel by adopting a 10T vacuum induction furnace, and casting and forming the molten steel to obtain an electroslag rod by combining an LF external refining process and VD vacuum degassing; controlling the contents of main chemical components, gas and harmful elements of the molten steel; in the smelting process, the contents of tungsten (W), vanadium (V) and cobalt (Co) in molten steel are strictly controlled to be 6.00-6.20%, 2.45-2.60% and 1.80-2.20%.
S3, electroslag remelting (ESR): adding the electroslag rod into a remelting furnace to remelt the electroslag rod under a vacuum condition to obtain an electroslag ingot;
s4, annealing and checking: the electroslag ingot is treated by adopting a stress relief annealing process; because the electroslag ingot has the defect of stress concentration and the like, the hardness of the electroslag ingot is reduced by adopting a long-time stress relief annealing process, the residual stress is eliminated, the cold cracking is reduced, the thermoplasticity is improved, and the next procedure is carried out
S5, forging and cogging: forging, and crushing coarse eutectic ledeburite; the forging machine adopts a large enough forging ratio to forge, so that coarse eutectic ledeburite in the high-speed steel is crushed, the segregation effect of carbide is improved, and the uniformity of the structure is further improved. The defects of inner holes, shrinkage cavities and the like of the electroslag ingot are removed, shrinkage porosity is reduced, and the density is increased; the forging ratio is more than or equal to 5;
s6, hot rolling: straightening and finishing after rolling and warehousing or warehousing after heat treatment.
Further, in step S2, calcium silicate wire with the mass of 0.5-1% of that of the high-speed steel raw material is added in the process of LF external refining. The vanadium-containing alloy is matched with vanadium in the material to improve carbide distribution and refine carbide grain size, so that the components are accurately controlled, the molten steel quality is improved, and the casting state is improved.
Further, in step S6, the heat treatment is performed at a high-temperature quenching temperature close to the melting point. Quenching is the most sensitive process influencing the performance of the high-speed steel material in the use state, and the high-temperature quenching temperature close to the melting point is adopted for carrying out heat treatment on the high-speed steel material, so that the alloy content in the martensite after quenching is ensured, and the hot hardness of the high-speed steel material is improved.
Further, in step S6, high-temperature tempering is performed after quenching. So that vanadium and tungsten carbides and secondary carbides precipitated from martensite are dispersed and distributed to generate secondary hardening. After quenching, at least a second high temperature tempering is carried out.
Compared with the prior art, the invention has the following advantages:
1. vanadium can obviously improve the wear resistance of the material, is the element with the strongest M-C binding capacity in common elements of high-speed steel, is combined with C to form MC type carbide, and exists on the premise of ensuring excellent performances of high-speed steel such as hardness, red hardness, wear resistance and the like. The MC type carbide in the high-speed steel is highest in both stability and hardness, is mostly precipitated from a liquid phase in the smelting process and is irregular disk-shaped or strip-shaped, is subjected to thermoplastic deformation processing and then is dispersed in a primary carbide strip in a granular manner, and has great influence on the friction characteristic of the steel. With the increase of the content of vanadium element, the abrasion resistance of the high speed steel will be increased remarkably.
2. The vanadium element can obviously improve the secondary hardening capacity of the material, and the vanadium element content of M42 is controlled to be between 2.45 and 2.60 percent during the component proportioning, thereby obviously improving the wear resistance and simultaneously considering the cutting processing performance.
3. The carbon element is a key element for forming alloy carbide, the carbon content needs to be correspondingly increased when the content of the alloy element is increased, and the carbon content is increased by 0.1 percent on the basis of the original M42 during component proportioning. Increasing the carbon content increases the hardness of the material, but at the same time increases the carbide content, enlarging the particles and causing carbide segregation. Meanwhile, cobalt is selectively added, the binding energy of cobalt and carbon forming carbide is slightly lower than that of iron, carbide is not formed independently, and the cobalt and the iron have good intersolubility, most of cobalt is dissolved in a matrix in an annealing state and a quenching state, crystal grain growth and other overheating and overburning behaviors are not promoted while the melting temperature of high-speed steel is increased, more carbide is dissolved in the quenching process, meanwhile, the cobalt can reduce the quantity of retained austenite in the quenching state, the secondary hardening precipitation rate is increased and the growth rate is reduced during tempering, and therefore the tempering stability of the high-speed steel is effectively improved, crystal grains are refined, and the red hardness is increased.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
Case 1:
a novel high-vanadium W6+ Co high-speed steel material comprises the following components in percentage by mass: c1%, Si 0.3%, Mn 0.2%, P0.01%, S0.01%, Cr 3.80%, V2.45%, Mo 5.00%, W6.00%, Co 1.80%, and the balance of Fe.
A preparation method of a novel high-vanadium W6+ Co high-speed steel material comprises the following steps:
s1, mixing the following raw materials: selecting raw materials according to the weight ratio of each element in the high-speed steel, wherein the high-speed steel material comprises the following components in percentage by mass: c1%, Si 0.3%, Mn 0.2%, P0.01%, S0.01%, Cr 3.80%, V2.45%, Mo 5.00%, W6.00%, Co 1.80%, and the balance of Fe;
s2, smelting: smelting the raw materials into molten steel by adopting a 10T vacuum induction furnace, and casting and forming the molten steel to obtain an electroslag rod by combining an LF external refining process and VD vacuum degassing; adding calcium silicate wire accounting for 0.5-1% of the mass of the high-speed steel raw material in the LF external refining process;
s3, electroslag remelting (ESR): adding the electroslag rod into a remelting furnace to remelt the electroslag rod under a vacuum condition to obtain an electroslag ingot;
s4, annealing and checking: the electroslag ingot is treated by adopting a stress relief annealing process;
s5, forging and cogging: forging, and crushing coarse eutectic ledeburite;
s6, hot rolling: straightening and finishing after rolling, or warehousing after heat treatment; the heat treatment adopts high-temperature quenching temperature close to the melting point to treat the steel plate; high temperature tempering is performed after quenching.
Case 2:
a novel high-vanadium W6+ Co high-speed steel material comprises the following components in percentage by mass: 1.07% of C, 0.4% of Si, 0.4% of Mn, 0.02% of P, 0.02% of S, 4.2% of Cr, 2.6% of V, 5.2% of Mo, 6.2% of W, 2.2% of Co and the balance of Fe.
A preparation method of a novel high-vanadium W6+ Co high-speed steel material comprises the following steps:
s1, mixing the following raw materials: selecting raw materials according to the weight ratio of each element in the high-speed steel, wherein the high-speed steel material comprises the following components in percentage by mass: 1.07% of C, 0.4% of Si, 0.4% of Mn, 0.02% of P, 0.02% of S, 4.2% of Cr, 2.6% of V, 5.2% of Mo, 6.2% of W, 2.2% of Co and the balance of Fe;
s2, smelting: smelting the raw materials into molten steel by adopting a 10T vacuum induction furnace, and casting and forming the molten steel to obtain an electroslag rod by combining an LF external refining process and VD vacuum degassing; adding calcium silicate wire accounting for 0.5-1% of the mass of the high-speed steel raw material in the LF external refining process;
s3, electroslag remelting (ESR): adding the electroslag rod into a remelting furnace to remelt the electroslag rod under a vacuum condition to obtain an electroslag ingot;
s4, annealing and checking: the electroslag ingot is treated by adopting a stress relief annealing process;
s5, forging and cogging: forging, and crushing coarse eutectic ledeburite;
s6, hot rolling: straightening and finishing after rolling, or warehousing after heat treatment; the heat treatment adopts high-temperature quenching temperature close to the melting point to treat the steel plate; high temperature tempering is performed after quenching.
Case 3:
a novel high-vanadium W6+ Co high-speed steel material comprises the following components in percentage by mass: 1.07% of C, 0.35% of Si, 0.35% of Mn, 0.02% of P, 0.02% of S, 4.2% of Cr, 2.45% of V, 5.2% of Mo, 6.2% of W, 2.2% of Co and the balance of Fe.
A preparation method of a novel high-vanadium W6+ Co high-speed steel material comprises the following steps:
s1, mixing the following raw materials: selecting raw materials according to the weight ratio of each element in the high-speed steel, wherein the high-speed steel material comprises the following components in percentage by mass: 1.07% of C, 0.35% of Si, 0.35% of Mn, 0.02% of P, 0.02% of S, 4.2% of Cr, 2.45% of V, 5.2% of Mo, 6.2% of W, 2.2% of Co and the balance of Fe;
s2, smelting: smelting the raw materials into molten steel by adopting a 10T vacuum induction furnace, and casting and forming the molten steel to obtain an electroslag rod by combining an LF external refining process and VD vacuum degassing; adding calcium silicate wire accounting for 0.5-1% of the mass of the high-speed steel raw material in the LF external refining process;
s3, electroslag remelting (ESR): adding the electroslag rod into a remelting furnace to remelt the electroslag rod under a vacuum condition to obtain an electroslag ingot;
s4, annealing and checking: the electroslag ingot is treated by adopting a stress relief annealing process;
s5, forging and cogging: forging, and crushing coarse eutectic ledeburite;
s6, hot rolling: straightening and finishing after rolling, or warehousing after heat treatment; the heat treatment adopts high-temperature quenching temperature close to the melting point to treat the steel plate; high temperature tempering is performed after quenching.
Case 4:
a novel high-vanadium W6+ Co high-speed steel material comprises the following components in percentage by mass: 1.07% of C, 0.35% of Si, 0.3% of Mn, 0.02% of P, 0.02% of S, 4% of Cr, 2.5% of V, 5.1% of Mo, 6% of W, 2% of Co and the balance of Fe.
A preparation method of a novel high-vanadium W6+ Co high-speed steel material comprises the following steps:
s1, mixing the following raw materials: selecting raw materials according to the weight ratio of each element in the high-speed steel, wherein the high-speed steel material comprises the following components in percentage by mass: 1.07% of C, 0.35% of Si, 0.3% of Mn, 0.02% of P, 0.02% of S, 4% of Cr, 2.5% of V, 5.1% of Mo, 6% of W, 2% of Co and the balance of Fe;
s2, smelting: smelting the raw materials into molten steel by adopting a 10T vacuum induction furnace, and casting and forming the molten steel to obtain an electroslag rod by combining an LF external refining process and VD vacuum degassing; adding calcium silicate wire accounting for 0.5-1% of the mass of the high-speed steel raw material in the LF external refining process;
s3, electroslag remelting (ESR): adding the electroslag rod into a remelting furnace to remelt the electroslag rod under a vacuum condition to obtain an electroslag ingot;
s4, annealing and checking: the electroslag ingot is treated by adopting a stress relief annealing process;
s5, forging and cogging: forging, and crushing coarse eutectic ledeburite;
s6, hot rolling: straightening and finishing after rolling, or warehousing after heat treatment; the heat treatment adopts high-temperature quenching temperature close to the melting point to treat the steel plate; high temperature tempering is performed after quenching.
Case 5:
a novel high-vanadium W6+ Co high-speed steel material comprises the following components in percentage by mass: 1.05% of C, 0.32% of Si, 0.35% of Mn, 0.02% of P, 0.02% of S, 4.15% of Cr, 2.55% of V, 5.1% of Mo, 6.1% of W, 2.1% of Co and the balance of Fe.
A preparation method of a novel high-vanadium W6+ Co high-speed steel material comprises the following steps:
s1, mixing the following raw materials: selecting raw materials according to the weight ratio of each element in the high-speed steel, wherein the high-speed steel material comprises the following components in percentage by mass: 1.05% of C, 0.32% of Si, 0.35% of Mn, 0.02% of P, 0.02% of S, 4.15% of Cr, 2.55% of V, 5.1% of Mo, 6.1% of W, 2.1% of Co and the balance of Fe;
s2, smelting: smelting the raw materials into molten steel by adopting a 10T vacuum induction furnace, and casting and forming the molten steel to obtain an electroslag rod by combining an LF external refining process and VD vacuum degassing; adding calcium silicate wire accounting for 0.5-1% of the mass of the high-speed steel raw material in the LF external refining process;
s3, electroslag remelting (ESR): adding the electroslag rod into a remelting furnace to remelt the electroslag rod under a vacuum condition to obtain an electroslag ingot;
s4, annealing and checking: the electroslag ingot is treated by adopting a stress relief annealing process;
s5, forging and cogging: forging, and crushing coarse eutectic ledeburite;
s6, hot rolling: straightening and finishing after rolling, or warehousing after heat treatment; the heat treatment adopts high-temperature quenching temperature close to the melting point to treat the steel plate; high temperature tempering is performed after quenching.
Comparative example 1
Comparative example 1 is a tungsten-molybdenum-based high-speed steel.
| Example 1 | Example 2 | Example 5 | Comparative example 1 | |
| Compressive strength MPa | 4685 | 4853 | 4760 | 4485 |
| Impact toughness J/m2 | 50 | 52 | 52 | 47 |
| Bending strength MPa | 5217 | 5305 | 5272 | 5017 |
| Hardness HRC | 67 | 68 | 67 | 66 |
The above components are all standard components or components known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experiments.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (3)
1. The high-vanadium W6+ Co high-speed steel material is characterized by comprising the following components in percentage by mass: 1 to 1.07 percent of C, 0.3 to 0.4 percent of Si, 0.2 to 0.4 percent of Mn, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, 3.80 to 4.20 percent of Cr, 2.45 to 2.60 percent of V, 5.00 to 5.20 percent of Mo, 6.00 to 6.20 percent of W, 1.80 to 2.20 percent of Co and the balance of Fe;
the preparation method of the high-vanadium W6+ Co high-speed steel material comprises the following steps:
s1, mixing the following raw materials: selecting raw materials according to the weight ratio of each element in the high-speed steel, wherein the high-speed steel material comprises the following components in percentage by mass: 1 to 1.07 percent of C, 0.3 to 0.4 percent of Si, 0.2 to 0.4 percent of Mn, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, 3.80 to 4.20 percent of Cr, 2.45 to 2.60 percent of V, 5.00 to 5.20 percent of Mo, 6.00 to 6.20 percent of W, 1.80 to 2.20 percent of Co and the balance of Fe;
s2, smelting: smelting the raw materials into molten steel by adopting a 10T vacuum induction furnace, and casting and forming the molten steel to obtain an electroslag rod by combining an LF external refining process and VD vacuum degassing;
s3, electroslag remelting (ESR): adding the electroslag rod into a remelting furnace to remelt the electroslag rod under a vacuum condition to obtain an electroslag ingot;
s4, annealing and checking: the electroslag ingot is treated by adopting a stress relief annealing process;
s5, forging and cogging: forging, and crushing coarse eutectic ledeburite;
s6, hot rolling: performing heat treatment and then warehousing; the heat treatment is carried out at a high-temperature quenching temperature close to the melting point, and at least secondary high-temperature tempering is carried out after quenching.
2. The preparation method of the high-vanadium W6+ Co high-speed steel material as claimed in claim 1, characterized by comprising the following steps:
s1, mixing the following raw materials: selecting raw materials according to the weight ratio of each element in the high-speed steel, wherein the high-speed steel material comprises the following components in percentage by mass: 1 to 1.07 percent of C, 0.3 to 0.4 percent of Si, 0.2 to 0.4 percent of Mn, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, 3.80 to 4.20 percent of Cr, 2.45 to 2.60 percent of V, 5.00 to 5.20 percent of Mo, 6.00 to 6.20 percent of W, 1.80 to 2.20 percent of Co and the balance of Fe;
s2, smelting: smelting the raw materials into molten steel by adopting a 10T vacuum induction furnace, and casting and forming the molten steel to obtain an electroslag rod by combining an LF external refining process and VD vacuum degassing;
s3, electroslag remelting (ESR): adding the electroslag rod into a remelting furnace to remelt the electroslag rod under a vacuum condition to obtain an electroslag ingot;
s4, annealing and checking: the electroslag ingot is treated by adopting a stress relief annealing process;
s5, forging and cogging: forging, and crushing coarse eutectic ledeburite;
s6, hot rolling: performing heat treatment and then warehousing; the heat treatment is carried out at a high-temperature quenching temperature close to the melting point, and at least secondary high-temperature tempering is carried out after quenching.
3. The method for preparing the high-vanadium W6+ Co high-speed steel material as claimed in claim 2, wherein in step S2, Si-Ca wires are added in the LF external refining process, wherein the Si-Ca wires account for 0.5-1% of the mass of the high-speed steel raw materials.
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