CN112375955B - Bar steel rolling part and production process thereof - Google Patents
Bar steel rolling part and production process thereof Download PDFInfo
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- CN112375955B CN112375955B CN202011261023.XA CN202011261023A CN112375955B CN 112375955 B CN112375955 B CN 112375955B CN 202011261023 A CN202011261023 A CN 202011261023A CN 112375955 B CN112375955 B CN 112375955B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
- C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
- C22C32/0026—Matrix based on Ni, Co, Cr or alloys thereof
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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
- C22C38/18—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
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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
- C22C38/40—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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- 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
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
Abstract
The invention discloses a bar steel rolling piece and a production process thereof, wherein the bar steel rolling piece comprises the following components in percentage by mass: carbon: 0.12-0.20 wt%, silicon: 0.41 to 0.74 wt%, manganese: 9.20-12.60 wt%, phosphorus is less than or equal to 0.01 wt%, sulfur is less than or equal to 0.01 wt%, nickel: 12.20-19.60 wt%, chromium: 21.30-32.50 wt%, molybdenum: 4.20-7.60 wt%, vanadium: 2.12-4.00 wt%, tungsten: 3.36-5.15 wt%, rare earth oxide: 0.20-0.36 wt%, and the balance of Fe and inevitable impurities, wherein the preparation of the bar rolled steel piece adopts production line operation, so that the production efficiency is improved, a plurality of polishing machines are arranged in the production line, so that the surface roughness of a workpiece is improved, and the production line produces the bar rolled steel piece and has the advantages of better mechanical property, high temperature resistance, corrosion resistance, wear resistance and the like.
Description
Technical Field
The invention relates to the technical field of bar steel rolling pieces, in particular to a bar steel rolling piece and a production process of the bar steel rolling piece.
Background
The bar is widely applied to the industrial fields of military industry, machinery, manufacturing industry and the like, has a positive promoting effect on the fields of automobile manufacturing industry, mechanical industrial production and the like, and makes little contribution to the development of national economy. At present, most of the super-precision surface rod pieces used by equipment and instruments requiring precision matching, precision sealing and precise movement in China need to be imported.
For example, as shown in fig. 1, a prior art patent document CN201891403U discloses a sealing device for a hot-producing polished rod, which is a situation where a rod is used as an ultra-precise surface rod, and the sealing device is composed of an upper packing gland 1, an upper packing cavity 2, a lower packing gland 3, a lower packing cavity 4, a high-precision polished rod 5, a short seal 6, a lower sealing packing 7, a lower packing press block 8 and an upper sealing packing 9, wherein the upper packing gland 1, the upper packing cavity 2, the lower packing press block 3, the lower packing press block 8, the lower packing cavity 4 and the short seal 6 are sequentially connected, the upper sealing packing 9 is packed in the upper cavity 2, the lower sealing packing 7 is in the lower packing cavity 4, the high-precision polished rod 5 and the short seal 6 are in clearance fit to form a heat insulation sealing band, the surface of the high-precision polished rod 5 is subjected to spray welding, the hardness of a spray welding layer is 58-63HRC, and the surface roughness is lower than 0.8 um. The inner surface of the sealing short joint is treated by nickel and phosphorus plating, the surface hardness is 65-68HRC, the surface roughness is lower than 0.41um, the production period of an oil well can be prolonged, and the well repairing cost is reduced.
Because the pressure in the oil well is higher, the sealing pressure between the packing type sealing sleeve and the polished rod bar is also higher, and the well fluid pumped out from the oil well contains H2S、C02、C1-、H20 and other comprehensive corrosion factors and hard solid suspended particles, when oil is pumped, the hard solid suspended particles in well fluid can enter a sealing gap between the packing type sealing sleeve and the polished rod bar, the rod body of the polished rod bar reciprocates in a sealing hole of the packing type sealing sleeve and is corroded by the abrasion of the hard solid suspended particles in the well fluid and the comprehensive corrosion factors of the well fluid contacting with the polished rod bar, after the polished rod bar is used for a period of time, the polished rod bar can lose efficacy due to abrasion and corrosion, and the abrasion resistance, the corrosion resistance and the roughness of the polished rod bar have new requirements, so that the service life of the polished rod bar can be prolonged.
In order to solve the technical problems, the application provides a bar steel rolling piece and a production process thereof, wherein the bar steel rolling piece comprises the following components in percentage by mass: carbon: 0.12-0.20 wt%, silicon: 0.41 to 0.74 wt%, manganese: 9.20-12.60 wt%, phosphorus is less than or equal to 0.01 wt%, sulfur is less than or equal to 0.01 wt%, nickel: 12.20-19.60 wt%, chromium: 21.30-32.50 wt%, molybdenum: 4.20-7.60 wt%, vanadium: 2.12-4.00 wt%, tungsten: 3.36-5.15 wt%, rare earth oxide: 0.20-0.36 wt%, and the balance of Fe and inevitable impurities, wherein the preparation of the bar rolled steel piece adopts production line operation, so that the production efficiency is improved, a plurality of polishing machines are arranged in the production line, so that the surface roughness of a workpiece is improved, and the production line produces the bar rolled steel piece and has the advantages of good mechanical property, high temperature resistance, corrosion resistance, wear resistance, good sealing effect and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a bar steel rolling part, which comprises the following components in percentage by mass: carbon: 0.12-0.20 wt%, silicon: 0.41 to 0.74 wt%, manganese: 9.20-12.60 wt%, phosphorus is less than or equal to 0.01 wt%, sulfur is less than or equal to 0.01 wt%, nickel: 12.20-19.60 wt%, chromium: 21.30-32.50 wt%, molybdenum: 4.20-7.60 wt%, vanadium: 2.12-4.00 wt%, tungsten: 3.36-5.15 wt%, rare earth oxide: 0.20-0.36 wt%, and the balance of Fe and inevitable impurities.
The rare earth oxide is one or more than two of lanthanum oxide, cerium oxide, praseodymium oxide, neodymium oxide and samarium oxide. The rod steel rolling piece can be used for a high-precision polished rod, the surface roughness is lower than 0.18um, the tensile strength is greater than or equal to 720MPA, the yield strength is greater than or equal to 320MPA, the elongation is less than or equal to 32%, and the hardness is greater than or equal to 120 HB. The diameter of the bar steel rolling piece is as follows: 28mm, 32mm, 36mm, 38mm, 42mm, 45mm, 68mm or 72mm, the sealing working pressure is more than or equal to 40MPa, and the high-temperature resistant working temperature is more than or equal to 660 ℃.
A method of making a bar rolled steel part, comprising the steps of:
Step 4, heating: feeding the feeding platform of the continuously cast solid bar steel blank into a walking beam type heating furnace (113) for heating, strictly controlling the heating temperature, and heating the solid bar steel blank to 950-;
step 5, rolling: the solid steel billet of the bar sequentially enters a rough rolling unit, a first flying shear, a middle rolling unit, a second flying shear, a finish rolling unit and a third flying shear, and is cooled on a cooling bed, wherein the initial rolling temperature is controlled to be 840 ℃ plus 960 ℃, the first flying shear, the second flying shear and the third flying shear are used for cutting off heads, tails and accident states, and finally the solid steel billet is placed in air to be naturally cooled to room temperature, so that a bar rolled steel part blank is obtained.
Step 6: polishing and grinding: after cold shearing is carried out on the bar steel rolling member blank, the bar steel rolling member blank sequentially enters a rough polishing and grinding unit, a fine polishing and grinding unit and a high-precision polishing and grinding unit; after the rough polishing grinding machine group polishes the bar steel rolling part blank, the surface roughness reaches 0.82 um; after the finish polishing polisher group polishes the bar steel rolling part blank, the surface roughness reaches 0.46 um; after the bar steel rolling piece blank is polished by the high-precision polishing and grinding machine set, the surface roughness reaches 0.18um, and a bar steel rolling piece is obtained;
and 7: packaging and warehousing: and the bar steel rolling piece enters a packaging machine for packaging, and then enters a collection table for warehousing.
The rough polishing and grinding unit, the fine polishing and grinding unit and the high-precision polishing and grinding unit are respectively provided with a plurality of polishing machines. The polishing machine comprises a support, the support is provided with a servo motor through a servo motor base, an output shaft of the servo motor is connected with a belt pulley, the belt pulley drives a rotating sleeve to rotate through a belt, the rotating sleeve is rotatably arranged on the support through a rotating sleeve bearing, the rotating sleeve drives a plurality of grinding tool mechanisms on the left side and the right side of the rotating sleeve to revolve through a grinding tool revolution driving mechanism, and the grinding tool mechanisms comprise grinding tool rotation driving motors and grinding tools.
Grinding apparatus revolution actuating mechanism includes rotatory sleeve ring gear, takes slide rail gear and rotor plate, rotatory sleeve ring gear sets up in V type spout bottom portion, take slide rail gear including taking slide rail gear tooth portion and taking slide rail gear slide rail, take slide rail gear tooth portion with rotatory sleeve ring gear meshing, take slide rail gear slide rail and V type spout to mutually support and slide, take slide rail gear to set to at least three, both ends are fixed with respectively about the rotation axis of taking slide rail gear the rotor plate, be provided with in the middle of the rotor plate through-hole that the rod rolled steel spare blank passes through, along rotor plate through-hole circumference equidistance interval is provided with grinding apparatus mechanism.
The invention has the following beneficial effects:
(1) the application discloses rod steel rolling spare, rod steel rolling spare composition mass percent is: carbon: 0.12-0.20 wt%, silicon: 0.41 to 0.74 wt%, manganese: 9.20-12.60 wt%, phosphorus is less than or equal to 0.01 wt%, sulfur is less than or equal to 0.01 wt%, nickel: 12.20-19.60 wt%, chromium: 21.30-32.50 wt%, molybdenum: 4.20-7.60 wt%, vanadium: 2.12-4.00 wt%, tungsten: 3.36-5.15 wt%, rare earth oxide: 0.20-0.36 wt%, and the balance of Fe and inevitable impurities. The rare earth oxide is one or more than two of lanthanum oxide, cerium oxide, praseodymium oxide, neodymium oxide and samarium oxide. The rod steel rolling piece can be used for a high-precision polished rod, the surface roughness is lower than 0.18um, the tensile strength is greater than or equal to 720MPA, the yield strength is greater than or equal to 320MPA, the elongation is less than or equal to 32%, and the hardness is greater than or equal to 120 HB. The diameter of the bar steel rolling piece is as follows: 28mm, 32mm, 36mm, 38mm, 42mm, 45mm, 68mm or 72mm, the sealing working pressure is more than or equal to 40MPa, and the high-temperature resistant working temperature is more than or equal to 660 ℃. The above element selection and proportioning coactions form the better physical properties of the applied bar steel rolling piece.
(2) The preparation method of the bar steel rolling piece comprises the following steps: step 1, rough smelting: the mass percentages of the components of the bar rolled steel part through a converter are as follows: carbon: 0.12-0.20 wt%, silicon: 0.41 to 0.74 wt%, manganese: 9.20-12.60 wt%, phosphorus is less than or equal to 0.01 wt%, sulfur is less than or equal to 0.01 wt%, nickel: 12.20-19.60 wt%, chromium: 21.30-32.50 wt%, molybdenum: 4.20-7.60 wt%, vanadium: 2.12-4.00 wt%, tungsten: 3.36-5.15 wt%, rare earth oxide: 0.20 to 0.36 wt%, and the balance of Fe and inevitable impurities, and refining to obtain rough-refined molten steel; step 2, refining: refining the crude steelmaking water obtained in the step 1 by a refining furnace to reduce the content of impurities in steel as much as possible, thereby ensuring the performance and surface quality of the product and obtaining refined molten steel; step 3, continuous casting: and (3) obtaining the refined molten steel in the step (2), rolling the refined molten steel through a continuous casting machine, carrying out whole-process protective pouring during continuous casting, and controlling the temperature of the molten steel to finally obtain the bar solid billet. Step 4, heating: feeding the feeding platform of the continuously cast solid bar steel blank into a walking beam type heating furnace for heating, strictly controlling the heating temperature, and heating the solid bar steel blank to 950-1050 ℃; step 5, rolling: the solid steel billet of the bar sequentially enters a rough rolling unit, a first flying shear, a middle rolling unit, a second flying shear, a finish rolling unit and a third flying shear, and is cooled on a cooling bed, wherein the initial rolling temperature is controlled to be 840 ℃ plus 960 ℃, the first flying shear, the second flying shear and the third flying shear are used for cutting off heads, tails and accident states, and finally the solid steel billet is placed in air to be naturally cooled to room temperature, so that a bar rolled steel part blank is obtained. Step 6: polishing and grinding: after cold shearing is carried out on the bar steel rolling member blank, the bar steel rolling member blank sequentially enters a rough polishing and grinding unit, a fine polishing and grinding unit and a high-precision polishing and grinding unit; after the rough polishing grinding machine group polishes the bar steel rolling part blank, the surface roughness reaches 0.82 um; after the finish polishing polisher group polishes the bar steel rolling part blank, the surface roughness reaches 0.46 um; after the bar steel rolling piece blank is polished by the high-precision polishing and grinding machine set, the surface roughness reaches 0.18um, and a bar steel rolling piece is obtained; production line equipment is rationally arranged, practices thrift the space, adopts automation, intensive production manufacturing, makes the rod earlier among the prior art, transports corresponding manufacturing plant again, makes corresponding work piece, and save time more improves advantages such as production efficiency.
(3) The application is provided with the burnishing machine on the production line of rod steel rolling spare, includes: the rough polishing and grinding unit, the fine polishing and grinding unit and the high-precision polishing and grinding unit are respectively provided with a plurality of polishing machines. The polishing machine comprises a support, the support is provided with a servo motor through a servo motor base, an output shaft of the servo motor is connected with a belt pulley, the belt pulley drives a rotating sleeve to rotate through a belt, the rotating sleeve is rotatably arranged on the support through a rotating sleeve bearing, the rotating sleeve drives a plurality of grinding tool mechanisms on the left side and the right side of the rotating sleeve to revolve through a grinding tool revolution driving mechanism, and the grinding tool mechanisms comprise grinding tool rotation driving motors and grinding tools. Grinding apparatus revolution actuating mechanism includes rotatory sleeve ring gear, takes slide rail gear and rotor plate, rotatory sleeve ring gear sets up in V type spout bottom portion, take slide rail gear including taking slide rail gear tooth portion and taking slide rail gear slide rail, take slide rail gear tooth portion with rotatory sleeve ring gear meshing, take slide rail gear slide rail and V type spout to mutually support and slide, take slide rail gear to set to at least three, both ends are fixed with respectively about the rotation axis of taking slide rail gear the rotor plate, be provided with in the middle of the rotor plate through-hole that the rod rolled steel spare blank passes through, along rotor plate through-hole circumference equidistance interval is provided with grinding apparatus mechanism. To sum up, on the production line of the rod steel rolling piece of this application, the novelty is provided with the burnishing machine that conveniently is used for on the production line to the messenger improves workpiece surface roughness.
Drawings
FIG. 1 is a schematic structural diagram of a hot collecting rod sealing device disclosed in CN201891403U of the background art of the present invention;
FIG. 2 is a block schematic view of a process for the preparation of a bar rolled steel part according to the invention;
FIG. 3 is a schematic view of a sequential arrangement of the apparatus for the preparation of the bar rolled steel of the present invention;
FIG. 4 is a schematic view of the configuration of the burnishing machine 200 of the bar rolled steel of the present invention;
FIG. 5 is a schematic cross-sectional view of a burnishing machine 200 of the bar rolled steel of the present invention;
fig. 6A and 6B are schematic views of the structure of the rotating ring collar 301 of the polishing machine 200 of the bar rolled steel of the present invention;
fig. 7 is a schematic structural view of the sliding rack gear 302 of the polishing machine 200 for bar rolled steel products of the present invention;
wherein:
100 is a conveying mechanism, 110 is a converter, 111 is a refining furnace, 112 is a continuous casting machine, 113 is a walking beam type heating furnace, 114 is a rough rolling unit, 115 is a flying shear, 116 is a middle rolling unit, 117 is a flying shear, 118 is a finishing rolling unit, 119 is a flying shear, 120 is a cooling bed, 121 is a cold shear, 122 is a rough polishing grinding unit, 123 is a finishing polishing grinding unit, 124 is a high-precision polishing grinding unit, 125 is a packaging machine, and 126 is a collecting table;
200 is a polishing machine, 201 is a bracket, 202 is a servo motor, 203 is a belt, 204 is a rotating sleeve, 205 is a rotating sleeve, and 2041 is a V-shaped sliding groove;
300 is a grinding tool revolution driving mechanism, 301 is a rotary sleeve gear ring, 302 is a gear with a slide rail, 3021 is a gear tooth part with a slide rail, 3022 is a gear slide rail with a slide rail, 303 is a rotary plate, 3031 is a rotary plate through hole;
400 is a grinding tool mechanism, 401 is a grinding tool autorotation driving motor, 402 is a grinding tool, 500 is a bar rolled steel blank, and 501 is a bar rolled steel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments.
Example (b): referring to fig. 1 to 7, a rod steel rolling member, the rod steel rolling member 501 comprises the following components by mass percent: carbon: 0.12-0.20 wt%, silicon: 0.41 to 0.74 wt%, manganese: 9.20-12.60 wt%, phosphorus is less than or equal to 0.01 wt%, sulfur is less than or equal to 0.01 wt%, nickel: 12.20-19.60 wt%, chromium: 21.30-32.50 wt%, molybdenum: 4.20-7.60 wt%, vanadium: 2.12-4.00 wt%, tungsten: 3.36-5.15 wt%, rare earth oxide: 0.20-0.36 wt%, and the balance of Fe and inevitable impurities. The rare earth oxide is one or more of lanthanum oxide, cerium oxide, praseodymium oxide, neodymium oxide and samarium oxide. The rod steel rolling piece 501 can be used for a high-precision polished rod 5, the surface roughness is lower than 0.18um, the tensile strength is greater than or equal to 720MPA, the yield strength is greater than or equal to 320MPA, the elongation is less than or equal to 32%, and the hardness is greater than or equal to 120 HB. The diameter of the bar steel rolling piece 501 is as follows: 28mm, 32mm, 36mm, 38mm, 42mm, 45mm, 68mm or 72mm, the sealing working pressure is more than or equal to 40MPa, and the high-temperature resistant working temperature is more than or equal to 660 ℃.
A method of making a bar rolled steel part, comprising the steps of: step 1, rough smelting: the components of the bar steel rolling piece 501 processed by the converter 110 in percentage by mass are as follows: carbon: 0.12-0.20 wt%, silicon: 0.41 to 0.74 wt%, manganese: 9.20-12.60 wt%, phosphorus is less than or equal to 0.01 wt%, sulfur is less than or equal to 0.01 wt%, nickel: 12.20-19.60 wt%, chromium: 21.30-32.50 wt%, molybdenum: 4.20-7.60 wt%, vanadium: 2.12-4.00 wt%, tungsten: 3.36-5.15 wt%, rare earth oxide: 0.20 to 0.36 wt%, and the balance of Fe and inevitable impurities, and refining to obtain rough-refined molten steel;
Step 4, heating: feeding a feeding platform of continuously cast solid bar steel billets into a walking beam type heating furnace 113 for heating, strictly controlling the heating temperature, and heating the solid bar steel billets to 950-;
step 5, rolling: the solid steel billets of the bars sequentially enter a rough rolling unit 114, a first flying shear 115, a middle rolling unit 116, a second flying shear 117, a finish rolling unit 118 and a third flying shear 119, and are cooled on a cooling bed, wherein the rolling temperature is controlled to be 840 plus 960 ℃, and the first flying shear 115, the second flying shear 117 and the third flying shear 119 are used for cutting heads, tails and cutting off in an accident state and are finally placed in air to be naturally cooled to room temperature, so that a bar rolled steel blank 500 is obtained.
Step 6: polishing and grinding: after cold shearing 121 is carried out on the bar steel rolling member blank 500, the bar steel rolling member blank sequentially enters a rough polishing grinding unit 122, a fine polishing grinding unit 123 and a high-precision polishing grinding unit 124; after the rough polishing grinding unit 122 polishes the bar rolled steel blank 500, the surface roughness reaches 0.82 um; after the finish polishing grinding unit 123 polishes the bar rolled steel blank 500, the surface roughness reaches 0.46 um; after the high-precision polishing and grinding unit 124 polishes the bar rolled steel blank 500, the surface roughness reaches 0.18um, and a bar rolled steel 501 is obtained;
and 7: packaging and warehousing: the bar rolled steel 501 enters the packaging machine 125 for packaging and then enters the collection station 126 for warehousing.
The rough polishing grinder group 122, the fine polishing grinder group 123, and the high polishing grinder group 124 are provided with a plurality of polishing machines 200, respectively. The polishing machine 200 includes a support 201, the support 201 is provided with a servo motor 202 through a servo motor base, an output shaft of the servo motor 202 is connected with a belt pulley, the belt pulley drives a rotating sleeve 204 to make a rotating motion through a belt 203, the rotating sleeve 204 is rotatably arranged on the support 201 through a rotating sleeve bearing 205, the rotating sleeve 204 drives a plurality of grinding tool mechanisms 400 on the left and right sides of the rotating sleeve 204 to revolve through a grinding tool revolution driving mechanism 300, and the grinding tool mechanisms 400 include a grinding tool rotation driving motor 401 and a grinding tool 402. The grinding tool revolution driving mechanism 300 comprises a rotary sleeve gear ring 301, a sliding rail gear 302 and a rotary plate 303, wherein the rotary sleeve gear ring 301 is arranged at the bottom end of a V-shaped sliding groove 2041, the sliding rail gear 302 comprises a sliding rail gear tooth part 3021 and a sliding rail gear sliding rail 3022, the sliding rail gear tooth part 3021 is meshed with the rotary sleeve gear ring 301, the sliding rail gear sliding rail 3022 and the V-shaped sliding groove 2041 are matched with each other to slide, the sliding rail gear 302 is arranged into at least three parts, the left end and the right end of a rotating shaft of the sliding rail gear 302 are respectively fixed with the rotary plate 303, a rotary plate through hole 3031 through which a bar rolled steel blank 500 passes is arranged in the middle of the rotary plate 303, and the grinding tool mechanisms 400 are arranged at equal intervals along the circumferential direction of the rotary plate through hole 3031.
The invention has the following beneficial effects: the application discloses a rod steel rolling piece, rod steel rolling piece composition mass percent is: carbon: 0.12-0.20 wt%, silicon: 0.41 to 0.74 wt%, manganese: 9.20-12.60 wt%, phosphorus is less than or equal to 0.01 wt%, sulfur is less than or equal to 0.01 wt%, nickel: 12.20-19.60 wt%, chromium: 21.30-32.50 wt%, molybdenum: 4.20-7.60 wt%, vanadium: 2.12-4.00 wt%, tungsten: 3.36-5.15 wt%, rare earth oxide: 0.20-0.36 wt%, and the balance of Fe and inevitable impurities. The rare earth oxide is one or more of lanthanum oxide, cerium oxide, praseodymium oxide, neodymium oxide and samarium oxide. The rod steel rolling piece can be used for a high-precision polished rod, the surface roughness is lower than 0.18um, the tensile strength is greater than or equal to 720MPA, the yield strength is greater than or equal to 320MPA, the elongation is less than or equal to 32%, and the hardness is greater than or equal to 120 HB. The diameter of the bar steel rolling piece is as follows: 28mm, 32mm, 36mm, 38mm, 42mm, 45mm, 68mm or 72mm, the sealing working pressure is more than or equal to 40MPa, and the high-temperature resistant working temperature is more than or equal to 660 ℃. The above element selection and proportioning coactions form the better physical properties of the applied bar steel rolling piece. In addition, the method of making a bar rolled steel of the present application includes: step 1, rough smelting: the components of the bar rolled steel part by the converter in percentage by mass are as follows: carbon: 0.12-0.20 wt%, silicon: 0.41 to 0.74 wt%, manganese: 9.20-12.60 wt%, phosphorus is less than or equal to 0.01 wt%, sulfur is less than or equal to 0.01 wt%, nickel: 12.20-19.60 wt%, chromium: 21.30-32.50 wt%, molybdenum: 4.20-7.60 wt%, vanadium: 2.12-4.00 wt%, tungsten: 3.36-5.15 wt%, rare earth oxide: 0.20 to 0.36 wt%, and the balance of Fe and inevitable impurities, and refining to obtain rough-refined molten steel; step 2, refining: refining the obtained crude steelmaking water refined in the step 1 by a refining furnace to reduce the content of impurities in steel as much as possible, thereby ensuring the performance and surface quality of the product and obtaining refined molten steel; step 3, continuous casting: and (3) obtaining the refined molten steel in the step (2), rolling the refined molten steel through a continuous casting machine, carrying out whole-course protective pouring during continuous casting, and controlling the temperature of the molten steel to finally obtain the bar solid billet. Step 4, heating: feeding a feeding platform of continuously cast solid bar steel billets into a walking beam type heating furnace 113 for heating, strictly controlling the heating temperature, and heating the solid bar steel billets to 950-; step 5, rolling: the solid steel billet of the bar sequentially enters a rough rolling unit, a first flying shear, a middle rolling unit, a second flying shear, a finish rolling unit and a third flying shear, and is cooled on a cooling bed, wherein the initial rolling temperature is controlled to be 840 ℃ plus 960 ℃, the first flying shear, the second flying shear and the third flying shear are used for cutting off a head, a tail and an accident state, and finally the solid steel billet is placed in air to be naturally cooled to room temperature, so that a bar rolled steel part blank is obtained. Step 6: polishing and grinding: after cold shearing is carried out on a bar steel rolling member blank, the bar steel rolling member blank sequentially enters a rough polishing and grinding unit, a fine polishing and grinding unit and a high-precision polishing and grinding unit; after the rough polishing grinding machine group polishes the bar steel rolling member blank, the surface roughness reaches 0.82 um; after the finish polishing grinding machine group polishes the bar steel rolling member blank, the surface roughness reaches 0.46 um; after the bar steel rolling piece blank is polished by the high-precision polishing and grinding machine group, the surface roughness reaches 0.18um, and a bar steel rolling piece is obtained; production line equipment is rationally arranged, practices thrift the space, adopts automation, intensive production manufacturing, makes the rod earlier among the prior art, transports corresponding manufacturing plant again, makes corresponding work piece, and save time more improves advantages such as production efficiency. Finally, be provided with the burnishing machine on the production line of the rod steel rolling spare of this application, include: the rough polishing and grinding unit, the fine polishing and grinding unit and the high-precision polishing and grinding unit are respectively provided with a plurality of polishing machines. The polishing machine comprises a support, the support is provided with a servo motor through a servo motor base, an output shaft of the servo motor is connected with a belt pulley, the belt pulley drives a rotating sleeve to rotate through a belt, the rotating sleeve is rotatably arranged on the support through a rotating sleeve bearing, the rotating sleeve drives a plurality of grinding tool mechanisms on the left side and the right side of the rotating sleeve to revolve through a grinding tool revolution driving mechanism, and the grinding tool mechanisms comprise grinding tool rotation driving motors and grinding tools. Grinding apparatus revolution actuating mechanism includes rotatory sleeve ring gear, take slide rail gear and rotor plate, rotatory sleeve ring gear sets up in V type spout bottom portion, take slide rail gear including taking slide rail gear tooth portion and taking slide rail gear slide rail, take slide rail gear tooth portion and rotatory sleeve ring gear meshing, take slide rail gear slide rail and V type spout to mutually support and slide, it sets to at least three to take slide rail gear, both ends are fixed with the rotor plate respectively about the rotation axis of taking slide rail gear, be provided with the rotor plate through-hole that the rod rolled steel blank passes through in the middle of the rotor plate, be provided with grinding apparatus mechanism along rotor plate through-hole circumference equidistance interval. In conclusion, on the production line of the bar steel rolling piece, the polishing machine which is convenient to be used on the production line is innovatively arranged, so that the surface roughness of the workpiece is improved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (5)
1. A method of making a bar rolled steel part, comprising the steps of:
step 1, rough smelting: the raw material of the bar steel rolling piece (501) is refined through a converter (110), and the raw material comprises the following components in percentage by mass: carbon: 0.12-0.20 wt%, silicon: 0.41 to 0.74 wt%, manganese: 9.20-12.60 wt%, phosphorus is less than or equal to 0.01 wt%, sulfur is less than or equal to 0.01 wt%, nickel: 12.20-19.60 wt%, chromium: 21.30-32.50 wt%, molybdenum: 4.20-7.60 wt%, vanadium: 2.12-4.00 wt%, tungsten: 3.36-5.15 wt%, rare earth oxide: 0.20 to 0.36 wt%, and the balance of Fe and inevitable impurities to obtain a raw molten steel;
step 2, refining: refining the obtained crude steelmaking water refined in the step 1 through a refining furnace (111) to reduce the content of impurities in steel as much as possible, thereby ensuring the performance and surface quality of products and obtaining refined molten steel;
step 3, continuous casting: the refined molten steel is obtained in the step 2, is rolled through a continuous casting machine (112), and is subjected to full-process protective pouring during continuous casting, and the temperature of the molten steel is controlled, so that a bar solid billet is finally obtained;
step 4, heating: feeding the feeding platform of the continuously cast solid bar steel blank into a walking beam type heating furnace (113) for heating, strictly controlling the heating temperature, and heating the solid bar steel blank to 950-;
step 5, rolling: the solid steel billets for the bars sequentially enter a rough rolling unit (114), a first flying shear (115), a middle rolling unit (116), a second flying shear (117), a finishing rolling unit (118) and a third flying shear (119), and are then cooled on a cooling bed, wherein the rolling temperature is controlled to be 840-960 ℃, and the first flying shear (115), the second flying shear (117) and the third flying shear (119) are used for cutting off heads, tails and accident states and are finally placed in air to be naturally cooled to room temperature, so that a steel rolling member blank (500) for the bars is obtained;
step 6: polishing and grinding: after cold shearing (121) is carried out on the bar steel rolling member blank (500), the bar steel rolling member blank sequentially enters a rough polishing grinding unit (122), a fine polishing grinding unit (123) and a high-precision polishing grinding unit (124); after the rough polishing grinding unit (122) polishes the bar steel rolling part blank (500), the surface roughness reaches 0.82 um; after the finish polishing grinding unit (123) polishes the bar steel rolling part blank (500), the surface roughness reaches 0.46 um; after the bar rolled steel blank (500) is polished by the high-precision polishing and grinding unit (124), the surface roughness reaches 0.18um, and a bar rolled steel (501) is obtained;
the rough polishing grinding machine set (122), the fine polishing grinding machine set (123) and the high-precision polishing grinding machine set (124) are respectively provided with a plurality of polishing machines (200); the polishing machine (200) comprises a support (201), a servo motor (202) is arranged on the support (201) through a servo motor base, an output shaft of the servo motor (202) is connected with a belt pulley, the belt pulley drives a rotating sleeve (204) to rotate through a belt (203), the rotating sleeve (204) is rotatably arranged on the support (201) through a rotating sleeve bearing (205), the rotating sleeve (204) drives a plurality of grinding tool mechanisms (400) on the left side and the right side of the rotating sleeve (204) to revolve through a grinding tool revolution driving mechanism (300), and the grinding tool mechanisms (400) comprise grinding tool rotation driving motors (401) and grinding tools (402);
and 7: packaging and warehousing: and the bar steel rolling piece (501) enters a packaging machine (125) for packaging, and then enters a collection table (126) for warehousing.
2. The method for preparing a bar rolled steel product according to claim 1, wherein the grinding tool revolution driving mechanism (300) comprises a rotary sleeve gear ring (301), a sliding rack gear (302) and a rotary plate (303), the rotary sleeve gear ring (301) is arranged at the bottom end of the V-shaped chute (2041), the sliding rack gear (302) comprises a sliding rack gear tooth part (3021) and a sliding rack gear sliding rack (3022), the sliding rack gear tooth part (3021) is engaged with the rotary sleeve gear ring (301), the sliding rack gear sliding rack (3022) is matched with the V-shaped chute (2041) to slide, the sliding rack gear (302) is arranged in at least three numbers, the rotary plate (303) is respectively fixed at the left and right ends of the rotary shaft of the sliding rack gear (302), and a rotary plate through hole (3031) for passing the bar rolled steel product blank (500) is arranged in the middle of the rotary plate (303), the grinding tool mechanisms (400) are arranged along the circumferential direction of the rotating plate through hole (3031) at equal intervals.
3. The method of claim 1 or 2, wherein the rare earth oxide is one or more selected from lanthanum oxide, cerium oxide, praseodymium oxide, neodymium oxide, and samarium oxide.
4. A rod steel rolling member manufactured by the method for manufacturing a rod steel rolling member according to any one of claims 1 to 3, wherein the rod steel rolling member (501) is used for a polished rod (5) with high precision, and has a surface roughness of less than 0.18um, a tensile strength of 720MPa or more, a yield strength of 320MPa or more, an elongation of 32% or less, and a hardness of 120HB or more.
5. A rod rolled steel according to claim 4, characterized in that the diameter of the rod rolled steel (501) is: 28mm, 32mm, 36mm, 38mm, 42mm, 45mm, 68mm or 72mm, the sealing working pressure is more than or equal to 40MPa, and the high-temperature resistant working temperature is more than or equal to 660 ℃.
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|---|---|---|---|---|
| JPH06145895A (en) * | 1992-10-30 | 1994-05-27 | Kobe Steel Ltd | High sterength and high toughness steel wire rod, extra fine steel wire using the same steel wire rod, production therefor and straded steel wire |
| CN104789883A (en) * | 2015-03-11 | 2015-07-22 | 重庆川深金属新材料股份有限公司 | Novel heat resistant material for high temperature measurement and preparation method thereof |
| CN109763066A (en) * | 2019-01-18 | 2019-05-17 | 东方电气集团东方汽轮机有限公司 | A kind of ultra-high parameter steam turbine key hot-end component New Heat-Resistant Steel |
| CN111893388A (en) * | 2020-08-07 | 2020-11-06 | 阳春新钢铁有限责任公司 | Corrosion-resistant steel bar and production process thereof |
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2020
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06145895A (en) * | 1992-10-30 | 1994-05-27 | Kobe Steel Ltd | High sterength and high toughness steel wire rod, extra fine steel wire using the same steel wire rod, production therefor and straded steel wire |
| CN104789883A (en) * | 2015-03-11 | 2015-07-22 | 重庆川深金属新材料股份有限公司 | Novel heat resistant material for high temperature measurement and preparation method thereof |
| CN109763066A (en) * | 2019-01-18 | 2019-05-17 | 东方电气集团东方汽轮机有限公司 | A kind of ultra-high parameter steam turbine key hot-end component New Heat-Resistant Steel |
| CN111893388A (en) * | 2020-08-07 | 2020-11-06 | 阳春新钢铁有限责任公司 | Corrosion-resistant steel bar and production process thereof |
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