CN114653773B - Processing method of stainless steel grinding product for rail transit carrier - Google Patents

Processing method of stainless steel grinding product for rail transit carrier Download PDF

Info

Publication number
CN114653773B
CN114653773B CN202210255534.3A CN202210255534A CN114653773B CN 114653773 B CN114653773 B CN 114653773B CN 202210255534 A CN202210255534 A CN 202210255534A CN 114653773 B CN114653773 B CN 114653773B
Authority
CN
China
Prior art keywords
frame
stainless steel
steel coil
grinding
coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202210255534.3A
Other languages
Chinese (zh)
Other versions
CN114653773A (en
Inventor
刘志
徐勇军
刘洪�
肖文茂
张志军
顾宏杰
冯斌
胡余快
彭俊新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Baoxin Stainless Steel Co Ltd
Original Assignee
Ningbo Baoxin Stainless Steel Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Baoxin Stainless Steel Co Ltd filed Critical Ningbo Baoxin Stainless Steel Co Ltd
Priority to CN202210255534.3A priority Critical patent/CN114653773B/en
Publication of CN114653773A publication Critical patent/CN114653773A/en
Application granted granted Critical
Publication of CN114653773B publication Critical patent/CN114653773B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
    • 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
    • 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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/008—Machines comprising two or more tools or having several working posts
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
    • 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0242—Flattening; Dressing; Flexing
    • 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • C23G1/085—Iron or steel solutions containing HNO3
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • C23G1/086—Iron or steel solutions containing HF

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

The invention discloses a processing method of a stainless steel grinding product for a rail transit carrier, which is characterized by comprising the following steps of: 1) Continuously annealing and pickling the stainless steel black skin hot coil; 2) Rough rolling of stainless steel single-rack reversible cold rolling mill; 3) Coarse grinding by a stainless steel multi-frame continuous grinder; 4) Finish rolling is carried out on stainless steel by a single-rack reversible cold rolling mill; 5) Continuous annealing and pickling of stainless steel cold rolls; 6) Modulating and rolling by a stainless steel single-frame two-roller reversible temper mill; 7) Stainless steel multi-frame continuous grinding machine finish grinding; 8) Trimming and separating by a stainless steel rewinding unit. The surface of the steel coil obtained by the processing method presents discontinuous and short linear thick patterns, is attractive and elegant, has strong special metal stereoscopic impression of stainless steel, has high surface tension, and can meet the requirements of spraying and film coating.

Description

Processing method of stainless steel grinding product for rail transit carrier
Technical Field
The invention belongs to stainless steel cold rolling processing, and particularly relates to a processing method of a stainless steel grinding product for rail transit carriers.
Background
Rail transit is one of the important component blocks of new construction in China, and a vehicle body in the rail transit construction needs to be made of stainless steel materials meeting railway standards. The stainless steel material is mainly used at the side wall, the roof, the end wall and other parts of the vehicle body.
In the stainless steel material used for the carrier body, the chromium content is more than 12%, and the electrode potential is suddenly increased from-0.56V to +0.2V, so that the corrosion of a primary battery is not easy to occur, the corrosion resistance of the carrier body is obviously improved, the stainless steel material does not need to be subjected to corrosion protection in the manufacturing process, and the surface of the stainless steel material does not need to be painted after finishing and is directly used. However, the problems of light pollution, single surface and poor appearance are caused by the fact that the vehicle body directly uses the smooth surface of stainless steel.
Currently, there are two main solutions within the industry. The first is to adopt the coating of colored glue to decorate the automobile body, and the coating can not only cause the cost to rise, and in addition, in the use of colored glue coating in-process, receive stainless steel surface tension to influence, can appear the tectorial membrane difficulty, bulge, bubble scheduling problem, seriously influence automobile body pleasing to the eye. The second is to process patterns on the stainless steel surface, which not only can promote the metal texture of the stainless steel product surface, but also can solve the problems of difficult film coating and light pollution on the stainless steel surface, so that the stainless steel product can be directly used, can also be coated with films and sprayed for use, and the rail transit carrier is more in line with modern aesthetic.
In stainless steel products for vehicle bodies, the surface of the stainless steel product is typically machined using a grinding process to obtain a textured ground surface. Currently, the abrasive surface is mainly No.4, HL, wherein No.4 (see fig. 3) is snowflake-like, and HL (see fig. 4) is hair-like and straight-line-like. However, the patterns on the two grinding surfaces are plain and single, and the attractiveness is insufficient.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide a processing method of the stainless steel grinding product for the rail transit carrier, which can be used for processing discontinuous, short-line and rich-layering coarse patterns on the surface of a stainless steel product, so that the stainless steel grinding product has special metal third dimension and is more attractive and elegant.
The second technical problem to be solved by the invention is to provide a processing method of the stainless steel grinding product for the rail transit carrier, which can obviously improve the surface tension of the stainless steel grinding product and ensure that the surface spraying performance of the stainless steel grinding product is better.
The third technical problem to be solved by the invention is to provide a processing method of the stainless steel grinding product for the rail transit carrier, which can improve the mechanical property of the stainless steel grinding product.
The technical scheme adopted by the invention for solving the first technical problem is as follows: the processing method of the stainless steel grinding product for the rail transit carrier is characterized by sequentially comprising the following steps of:
1) Continuous annealing and pickling of stainless steel black skin hot coils: carrying out heat treatment on the stainless steel black skin coil so as to improve the mechanical property of the stainless steel black skin coil, and carrying out acid washing and dephosphorization on the annealed black skin coil so as to form a compact oxide film on the surface of the steel coil;
2) Rough rolling by a cold rolling mill;
3) Coarse grinding by a front multi-frame continuous grinding machine: the front multi-frame continuous grinding machine sequentially comprises a first frame, a second frame, a third frame, a fourth frame, a fifth frame and a sixth frame along the length direction of a steel coil, wherein 80# abrasive belts with the attenuation time of 20-70 min are arranged on the first frame and the second frame, 80# abrasive belts with the attenuation time of 200-600 min are arranged on the third frame, the fourth frame and the fifth frame, 80# abrasive belts with the attenuation time of 600-900 min are arranged on the sixth frame, and coarse grinding is carried out on the surface of the steel coil so as to remove raw material defects;
4) Finish rolling of a cold rolling mill: rolling the steel coil to a required thickness;
5) Continuous annealing and pickling of stainless steel cold rolls: solution heat treatment is carried out on the cold-rolled stainless steel coil so as to improve the mechanical property of the stainless steel coil, and acid washing passivation treatment is carried out on the steel coil, so that various dirt such as greasy dirt, rust, oxide skin, welding spots and the like can be removed;
6) Modulation rolling of a leveling machine: to obtain a flat plate type;
7) Finish grinding is carried out on a multi-frame continuous grinding machine: the subsequent multi-frame continuous grinding machine sequentially comprises a first frame, a second frame, a third frame, a fourth frame, a fifth frame and a sixth frame along the length direction of a steel coil, wherein 80# abrasive belts with attenuation time of 1200-2000 min are arranged on the first frame and the second frame, 80# abrasive belts with attenuation time of 20-70 min are arranged on the third frame and the sixth frame, 80# abrasive belts with attenuation time of 1100-1300 min are arranged on the fourth frame and the fifth frame, the abrasion is generated after the abrasive belts are normally used, the equal-height sand gravel on the abrasive belts is broken due to attenuation, so that the surface of the abrasive belts is different in depth, the abrasive belts after attenuation are adopted for grinding, more layered patterns can be processed, and the attenuation time refers to the normal use time of new abrasive belts;
8) Trimming and separating by a rewinding unit: and cutting edges and separating the ground steel coil according to the required width and weight. Wherein the rotating speed of the front multi-frame continuous grinding machine and the rear multi-frame continuous grinding machine is 15-20 m/min.
In order to avoid the deformation of the steel coil caused by continuous single-sided grinding, and simultaneously, in order to grind double-sided patterns, in step 7), the first rack and the second rack grind the lower surface of the steel coil, and the third rack, the fourth rack, the fifth rack and the sixth rack grind the upper surface of the steel coil.
The invention solves the second technical problem by adopting the technical proposal that: in step 8), a hydrophilic paper backing liner is used in winding.
In order to make the hydrophilic backing paper hydrophilic better, the hydrophilic backing paper comprises the following components in percentage by mass: 0.01 to 0.2 weight percent of extract, 0.1 to 0.2 weight percent of ash, 85 to 90 weight percent of alpha cellulose, 7 to 9 weight percent of pentose and 0.1 to 0.15 weight percent of lignin.
The technical scheme adopted by the invention for solving the third technical problem is as follows: in the step 6), the leveling machine arranges three passes so that the total elongation of the steel coil is more than or equal to 0.5 percent.
In order to make the mechanical property of the steel coil better, the stainless steel material comprises the following components in percentage by mass: c: less than or equal to 0.03 weight percent of Si: less than or equal to 1.00 weight percent, mn: less than or equal to 2.0wt percent, P: less than or equal to 0.045wt percent, S: less than or equal to 0.030 weight percent of Ni:6.00 to 8.00 weight percent of Cr: 16.00-18.00 wt% and the balance of Fe and unavoidable impurities.
In order to facilitate the grinding of the steel coil, in the steps 3) and 5), the steel coil is oil-ground by adopting grinding oil, and after the step 7), the steel coil is degreased by adopting alkali liquor, wherein the concentration of the alkali liquor is 5-10wt%, so as to clean the surface of the steel coil.
In order to make the pickling annealing effect better, in the step 1), the annealing temperature is 1100-1150 ℃ and H is adopted 2 S0 4 +HNO 3 The steel coil is pickled by a mixed acid of HF and two steps, wherein H is 2 S0 4 The concentration of (2) is 250-300 g/L, the temperature is 60-80 ℃, HNO 3 The concentration is 80-120 g/L, and the concentration of HF is 18-35 g/L.
Further designed, in the step 5), the annealing temperature is 1080-1110 ℃ and 'neutral salt electrolysis+HNO' is adopted 3 Electrochemical +HNO 3 The steel coil is pickled by a three-step pickling process of HF mixed acid, wherein the neutral salt concentration is 140-220 g/L, the current of a neutral salt rectifier is 1500-5500A, and the electric HNO is used for pickling the steel coil 3 The concentration is 80-200 g/L, the current of the electrochemical rectifier is 0-3040A, and HNO is passivated 3 The concentration is 80-160 g/L,HF concentration is 8-25 g/L.
In order to give the coil a suitable thickness during the rough grinding stage so that the coil has a specific basic pattern after rough grinding, the reduction is 15-30% in step 2).
Compared with the prior art, the invention has the advantages that:
1. in the rough grinding stage, the steel coil is ground according to a specific arrangement sequence by adopting three 80# abrasive belts with the attenuation time of 20-70 min, 200-600 min and 600-900 min, and as the granularity of sand in the 80# abrasive belts with different attenuation times is different and the depths are different, the steel coil is sequentially ground with gradually reduced grinding quantity, so that defects of different sizes on the surface of the steel coil can be better removed, the surface roughness of the steel coil is better improved, the surface quality of the steel coil can be further improved, basic patterns can be formed on the surface of the steel coil, then the steel coil is subjected to finish rolling, annealing, pickling and modulation rolling, most of the basic patterns are flattened, but the rough patterns of the basic patterns are still reserved, and finally in the finish grinding stage, the surface of the steel coil is subjected to finish machining according to the specific arrangement sequence by adopting the 80# abrasive belts with the attenuation time of 1200-2000 min, 20-70 min and 1100-1300 min, so that the surface of the finally processed stainless steel product presents discontinuous, short and rich rough patterns, and the stainless steel product has special three-dimensional metal and attractive appearance;
2. the hydrophilic paper-backing liner steel coil is adopted, so that the surface tension of a stainless steel product can be remarkably improved, the processed steel coil can pass a 44# dyne pen test (the steel coil processed by the prior art can only pass a 38# dyne pen test), and the surface tension of the steel coil can meet the requirements of spraying and film coating;
3. the steel coil is subjected to three-pass modulation rolling through a temper mill, so that the total elongation of the steel coil is more than or equal to 0.5%, the yield strength of the processed steel coil is more than or equal to 345Mpa, the tensile strength is more than or equal to 690Mpa, the elongation is more than or equal to 40%, and the mechanical property of the stainless steel product is better.
Drawings
FIG. 1 is a view of a stainless steel product surface according to an embodiment of the present invention;
FIG. 2 is a surface of a stainless steel product of a comparative example of the present invention;
FIG. 3 is a surface No.4 of a prior art stainless steel product;
fig. 4 is an HL surface of a prior art stainless steel product.
Detailed Description
The present invention is described in further detail below with reference to examples.
As shown in fig. 1, a preferred embodiment of the present invention is shown.
The processing method of the stainless steel grinding product for the rail transit carrier in the embodiment sequentially comprises the following steps:
1) Continuous annealing and pickling of stainless steel black skin hot coils: adopting a straight flame combustion suspension horizontal continuous annealing furnace to heat treat the stainless steel black skin coil, wherein the annealing temperature is 1100-1150 ℃ so as to improve the mechanical property of the stainless steel black skin coil; subsequently, use is made of "heat H 2 S0 4 +HNO 3 Acid washing and dephosphorizing the annealed black skin coil by an HF mixed acid two-step acid washing method process, wherein H is as follows 2 S0 4 The concentration is 250-300 g/L, and the temperature is 60-80 ℃; HNO (HNO) 3 The concentration is 80-120 g/L, and the concentration of HF is 18-35 g/L.
2) Stainless steel single-frame reversible cold rolling mill rough rolling: the rough rolling reduction is 15-30%.
3) Coarse grinding by a front multi-frame continuous grinding machine: the front multi-frame continuous grinding machine sequentially comprises a first frame, a second frame, a third frame, a fourth frame, a fifth frame and a sixth frame along the length direction of a steel coil, wherein 80# abrasive belts with the attenuation time of 20-70 min are arranged on the first frame and the second frame, 80# abrasive belts with the attenuation time of 200-600 min are arranged on the third frame, the fourth frame and the fifth frame, 80# abrasive belts with the attenuation time of 600-900 min are arranged on the sixth frame, coarse grinding is carried out on the upper surface of the steel coil by matching with grinding oil, and basic patterns are processed on the upper surface of the steel coil while raw material defects are removed.
4) Degreasing by adopting alkali liquor after coarse grinding to clean the surface of the steel coil, wherein the concentration of the alkali liquor is 5-10wt%;
5) Finish rolling of stainless steel single-rack reversible cold rolling mill: and rolling the steel coil which is cleaned after the raw material defects are removed to the required thickness.
6) Continuous annealing and pickling of stainless steel cold rolls: adopting a straight flame combustion overhanging horizontal continuous annealing furnace to carry out solution heat treatment on the cold rolled stainless steel coil, wherein the annealing temperature is 1080-1110 ℃ so as to improve the mechanical property of the cold rolled stainless steel coil; subsequently, neutral salt electrolysis+HNO is adopted 3 Electrochemical +HNO 3 Carrying out pickling passivation treatment on the steel coil by using an HF mixed acid three-step process, wherein the concentration of neutral salt is 140-220 g/L, and the current of a neutral salt rectifier is 1500-5500A; electrochemical HNO 3 The concentration is 80-200 g/L, and the current of the electrochemical rectifier is 0-3040A; passivating HNO 3 The concentration is 80-160 g/L, and the concentration of HF is 8-25 g/L.
7) Modulation rolling of stainless steel single-stand two-roller reversible temper mill: three passes are arranged in the flattening process pass, so that the total elongation of the steel coil is more than or equal to 0.5%, the yield strength of the processed steel coil is more than or equal to 345Mpa while the flat plate type steel coil is obtained, the tensile strength is more than or equal to 690Mpa, the elongation is more than or equal to 40%, and the mechanical property of a final product is met;
8) Finish grinding is carried out on a multi-frame continuous grinding machine: the subsequent multi-frame continuous grinding machine sequentially comprises a first frame, a second frame, a third frame, a fourth frame, a fifth frame and a sixth frame along the length direction of the steel coil, wherein 80# abrasive belts with the attenuation time of 1200-2000 min are arranged on the first frame and the second frame, and the lower surface of the steel coil is ground; the third frame and the sixth frame are respectively provided with an 80# abrasive belt with the attenuation time of 20-70 min, and the upper surface of the steel coil is ground; and 80# abrasive belts with the attenuation time of 1100-1300 min are arranged on the fourth frame and the fifth frame, and the upper surface of the steel coil is finely ground by matching with grinding oil, so that discontinuous, short-line-shaped and rich-level coarse patterns are formed on the surface of the stainless steel product.
9) Degreasing by adopting alkali liquor after finish grinding to clean the surface of the steel coil, wherein the concentration of the alkali liquor is 5-10wt%;
10 Edge cutting and coil separating of stainless steel recoiling machine set): cutting edges and separating rolls of the ground steel coil according to the required width and weight, and coiling by using a hydrophilic paper backing liner, wherein the hydrophilic paper backing liner comprises the following components in percentage by mass: 0.01 to 0.2 weight percent of extract, 0.1 to 0.2 weight percent of ash, 85 to 90 weight percent of alpha cellulose, 7 to 9 weight percent of pentose, 0.1 to 0.15 weight percent of lignin and the balance of unavoidable impurities, thereby obviously improving the surface tension of the stainless steel grinding product and enabling the surface tension of the steel coil to meet the spraying and film coating requirements.
Sample preparation
The examples and comparative examples were prepared using the same stainless steel materials.
The chemical compositions of the stainless steel materials are shown in table 1:
TABLE 1 chemical composition (wt%) of stainless steel materials
The processing technological process of the embodiment is as follows: annealing and pickling hot rolls, rough rolling, rough grinding, finish rolling, annealing and pickling cold rolls, leveling, fine grinding, trimming and separating rolls;
the processing technological process of the comparative example is as follows: annealing and pickling hot rolls, rolling, annealing and pickling cold rolls, grinding, leveling, trimming and separating rolls;
the process parameters in the working process flows of examples and comparative examples are shown in table 2:
table 2 process parameters of examples and comparative examples
Examples and comparative examples surface pattern comparison
The surface pattern of the comparative example product is shown in fig. 2, and even though the attenuated 80# abrasive belt is used, only a plain single surface pattern can be processed due to only one grinding process and small attenuation time difference on each frame (see fig. 2). In addition, the prior art generally uses unattenuated abrasive belts (i.e., new abrasive belts) to grind steel coils, and only produces plain single surface patterns, such as the pattern No.4 (see fig. 3) and HL pattern (see fig. 4).
The surface pattern of the product of the embodiment is shown in figure 1, and the basic pattern is processed on the surface of the steel coil by adopting attenuated 80# abrasive belt grinding in the rough grinding procedure; subsequently, although the steel coil is rolled and the basic pattern is mostly flattened, the rough pattern of the basic pattern is still reserved; finally, the upper surface and the lower surface of the steel coil are intermittently ground by adopting 80# abrasive belts with different decay time through a finish grinding procedure, so that three-dimensional patterns shown in figure 1 are formed, wherein the three-dimensional patterns are different from the surface patterns of the comparative example and the patterns No.4 (see figure 3) and the patterns HL (see figure 4) in the prior art.
Examples and comparative examples performance test
The mechanical properties and surface tension were tested for the examples and comparative examples, and the test results are shown in table 3:
TABLE 3 comparison of the Properties of inventive and comparative examples
As can be seen from table 3, the mechanical properties of the examples are superior to those of the comparative examples because three passes were leveled for the examples during the temper mill adjustment rolling stage, resulting in an increase in elongation of the coil and thus an increase in yield strength, tensile strength and elongation of the stainless steel product. It is also known from table 3 that the surface tension of the examples is higher than that of the comparative examples, because the hydrophilic paper-backing-paper-backing steel coil is adopted in the coil separation stage, so that the surface hydrophilicity of the steel coil is better and the surface tension is higher, and the surface of the stainless steel product can meet the requirements of spraying and film coating.

Claims (4)

1. The processing method of the stainless steel grinding product for the rail transit carrier is characterized by sequentially comprising the following steps of:
1) Continuously annealing and pickling the stainless steel black skin hot coil; the annealing temperature is 1100-1150 ℃ and H is adopted 2 S0 4 +HNO 3 The stainless steel coil is pickled by a mixed acid of HF and a two-step pickling process, wherein H is 2 S0 4 The concentration of (2) is 250-300 g/L, the temperature is 60-80 ℃, HNO 3 The concentration is 80-120 g/L, and the concentration of HF is 18-35 g/L;
2) Rough rolling by a cold rolling mill; the rolling reduction is 15-30%;
3) Coarse grinding by a front multi-frame continuous grinding machine: the front-channel multi-frame continuous grinding machine sequentially comprises a first frame, a second frame, a third frame, a fourth frame, a fifth frame and a sixth frame along the length direction of a stainless steel coil, wherein 80# abrasive belts with the attenuation time of 20-70 min are arranged on the first frame and the second frame, 80# abrasive belts with the attenuation time of 200-600 min are arranged on the third frame, the fourth frame and the fifth frame, and 80# abrasive belts with the attenuation time of 600-900 min are arranged on the sixth frame;
4) Finish rolling by a cold rolling mill;
5) Continuous annealing and pickling of stainless steel cold rolls;
6) Modulating and rolling by a leveling machine; three passes are arranged on the leveling machine, so that the total elongation of the stainless steel coil is more than or equal to 0.5%;
7) Finish grinding is carried out on a multi-frame continuous grinding machine: the subsequent multi-frame continuous grinding machine sequentially comprises a first frame, a second frame, a third frame, a fourth frame, a fifth frame and a sixth frame along the length direction of a stainless steel coil, wherein 80# abrasive belts with the attenuation time of 1200-2000 min are arranged on the first frame and the second frame, 80# abrasive belts with the attenuation time of 20-70 min are arranged on the third frame and the sixth frame, and 80# abrasive belts with the attenuation time of 1100-1300 min are arranged on the fourth frame and the fifth frame; the first rack and the second rack grind the lower surface of the stainless steel coil, and the third rack, the fourth rack, the fifth rack and the sixth rack grind the upper surface of the stainless steel coil;
8) Trimming and separating by a rewinding unit;
the stainless steel material comprises the following components in percentage by mass: c: less than or equal to 0.03 weight percent of Si: less than or equal to 1.00 weight percent, mn: less than or equal to 2.0wt percent, P: less than or equal to 0.045wt percent, S: less than or equal to 0.030 weight percent of Ni:6.00 to 8.00 weight percent of Cr: 16.00-18.00 wt% and the balance of Fe and unavoidable impurities.
2. The method of manufacturing a stainless steel polished article for rail transit vehicles according to claim 1, wherein in step 8), a hydrophilic paper backing is used for coiling.
3. The method of manufacturing a stainless steel mill for rail transit vehicles according to claim 1 or 2, wherein in steps 3) and 7), the stainless steel coil is oil-milled with mill oil, and after step 7), the stainless steel coil is degreased with alkali solution.
4. The method for producing a stainless steel polished article for rail transit vehicles according to claim 1 or 2, wherein in step 5), the annealing temperature is 1080 to 1110 ℃, and "neutral salt electrolysis+hno" is used 3 Electrochemical +HNO 3 The stainless steel coil is pickled by an HF mixed acid three-step pickling process, wherein the neutral salt concentration is 140-220 g/L, the current of a neutral salt rectifier is 1500-5500A, and the electrochemical HNO is realized 3 The concentration is 80-200 g/L, the current of the electrochemical rectifier is 0-3040A, and HNO is passivated 3 The concentration is 80-160 g/L, and the concentration of HF is 8-25 g/L.
CN202210255534.3A 2022-03-15 2022-03-15 Processing method of stainless steel grinding product for rail transit carrier Active CN114653773B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210255534.3A CN114653773B (en) 2022-03-15 2022-03-15 Processing method of stainless steel grinding product for rail transit carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210255534.3A CN114653773B (en) 2022-03-15 2022-03-15 Processing method of stainless steel grinding product for rail transit carrier

Publications (2)

Publication Number Publication Date
CN114653773A CN114653773A (en) 2022-06-24
CN114653773B true CN114653773B (en) 2024-01-12

Family

ID=82029643

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210255534.3A Active CN114653773B (en) 2022-03-15 2022-03-15 Processing method of stainless steel grinding product for rail transit carrier

Country Status (1)

Country Link
CN (1) CN114653773B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115091320B (en) * 2022-07-11 2024-04-02 山西太钢不锈钢股份有限公司 Preparation method of stainless steel grinding panel for carriage
CN115287430B (en) * 2022-08-04 2024-02-20 宁波宝新不锈钢有限公司 Preparation method of 304 austenitic stainless steel for household appliance panel

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09168803A (en) * 1995-12-18 1997-06-30 Nkk Corp Manufacture of hot rolled austenitic stainless steel strip excellent in grinding property
KR20050109358A (en) * 2004-05-15 2005-11-21 주식회사 포스코 Apparatus for manufacturing cold rolled stainless coil
CN102162075A (en) * 2010-02-23 2011-08-24 宝山钢铁股份有限公司 Austenitic stainless steel with excellent polishing performance and manufacturing method thereof
CN103191928A (en) * 2013-04-10 2013-07-10 张家港浦项不锈钢有限公司 304 stainless steel strip and production method thereof
CN103372567A (en) * 2012-04-26 2013-10-30 宝山钢铁股份有限公司 Method for producing ferritic stainless steel bands with roughened surfaces through cold continuous rolling
CN103433319A (en) * 2013-08-07 2013-12-11 宁波宝新不锈钢有限公司 Manufacture method of stainless steel external wall panel for rail vehicle
CN105057350A (en) * 2015-08-26 2015-11-18 山西太钢不锈钢股份有限公司 Method for rolling stainless steel for vehicles
CN106807751A (en) * 2016-12-27 2017-06-09 甘肃酒钢集团宏兴钢铁股份有限公司 A kind of cold-rolling process for decorating 304 stainless steel 2B base-materials of panel
CN108950159A (en) * 2018-06-22 2018-12-07 宁波宝新不锈钢有限公司 A kind of manufacturing method of the two-sided surface the BA stainless steel of cold rolling SUS304
CN113020911A (en) * 2021-03-12 2021-06-25 宁波宝新不锈钢有限公司 Preparation method of austenitic stainless steel matt product
CN113102506A (en) * 2021-03-30 2021-07-13 天津太钢天管不锈钢有限公司 Manufacturing method of austenitic stainless steel

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09168803A (en) * 1995-12-18 1997-06-30 Nkk Corp Manufacture of hot rolled austenitic stainless steel strip excellent in grinding property
KR20050109358A (en) * 2004-05-15 2005-11-21 주식회사 포스코 Apparatus for manufacturing cold rolled stainless coil
CN102162075A (en) * 2010-02-23 2011-08-24 宝山钢铁股份有限公司 Austenitic stainless steel with excellent polishing performance and manufacturing method thereof
CN103372567A (en) * 2012-04-26 2013-10-30 宝山钢铁股份有限公司 Method for producing ferritic stainless steel bands with roughened surfaces through cold continuous rolling
CN103191928A (en) * 2013-04-10 2013-07-10 张家港浦项不锈钢有限公司 304 stainless steel strip and production method thereof
CN103433319A (en) * 2013-08-07 2013-12-11 宁波宝新不锈钢有限公司 Manufacture method of stainless steel external wall panel for rail vehicle
CN105057350A (en) * 2015-08-26 2015-11-18 山西太钢不锈钢股份有限公司 Method for rolling stainless steel for vehicles
CN106807751A (en) * 2016-12-27 2017-06-09 甘肃酒钢集团宏兴钢铁股份有限公司 A kind of cold-rolling process for decorating 304 stainless steel 2B base-materials of panel
CN108950159A (en) * 2018-06-22 2018-12-07 宁波宝新不锈钢有限公司 A kind of manufacturing method of the two-sided surface the BA stainless steel of cold rolling SUS304
CN113020911A (en) * 2021-03-12 2021-06-25 宁波宝新不锈钢有限公司 Preparation method of austenitic stainless steel matt product
CN113102506A (en) * 2021-03-30 2021-07-13 天津太钢天管不锈钢有限公司 Manufacturing method of austenitic stainless steel

Also Published As

Publication number Publication date
CN114653773A (en) 2022-06-24

Similar Documents

Publication Publication Date Title
CN114653773B (en) Processing method of stainless steel grinding product for rail transit carrier
CN103009010B (en) 1100-H14 aluminum alloy plate-strip and production method thereof
CN105925900B (en) Tensile strength is 400MPa grades of great surface quality automobile hot rolling acid-cleaning steel and production method
CN103350110B (en) Method for manufacturing austenitic stainless steel band with smooth and bright surface
CN103060621B (en) 1100-H16 aluminum alloy plate/strip and production method thereof
CN103014426B (en) 1050-H14 aluminum alloy plate strip and production method thereof
CN103014425B (en) 1050-H16 aluminum alloy plate strip and production method thereof
CN102658294A (en) Low-carbon cold-rolled precision ultrathin steel strip for toy industry, and process method and application thereof
CN107052060A (en) A kind of method for eliminating acid-cleaning plate Pinhole-shaped pit defect
US3613319A (en) Metal rolling work roll and method of making same
CN108714624B (en) Processing method of low-carbon aluminum killed steel pickled plate
CN112981069B (en) Preparation method of low-glossiness stainless steel panel material
KR20120050732A (en) Electroplated steel sheet having hair line appearance and method for manudacturing the same
CN109530435A (en) A kind of cold rolling process and stainless steel band of stainless steel band
CN108149085B (en) Aluminum material without annealing treatment and with excellent surface quality and preparation method thereof
US6301943B1 (en) Method for finishing cold-rolled stainless steel
JPH02185959A (en) Production of hot dip galvanized steel sheet having superior vividness
JP2000233205A (en) Production of stainless steel strip excellent in contamination resistance, cleanability and antidazzle characteristic
CN114182079A (en) Control method for surface rolling lines of cold-rolled deep-drawing steel for outer plate
KR20140001557A (en) Method for manufacturing alloy plated steel sheet having excellent surface appearance
JPS63290602A (en) Manufacture of pretreated stainless steel strip for cold rolling
JPH0436763B2 (en)
CN115287430B (en) Preparation method of 304 austenitic stainless steel for household appliance panel
JPH0347928B2 (en)
JPH01118301A (en) Manufacture of dull finished austenitic stainless steel sheet having good finger mark stain resistance

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant