CN112090955A - Composite rolling method of corrosion-resistant spring flat steel - Google Patents
Composite rolling method of corrosion-resistant spring flat steel Download PDFInfo
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- CN112090955A CN112090955A CN202010917590.XA CN202010917590A CN112090955A CN 112090955 A CN112090955 A CN 112090955A CN 202010917590 A CN202010917590 A CN 202010917590A CN 112090955 A CN112090955 A CN 112090955A
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- stainless steel
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- welding
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- 238000005096 rolling process Methods 0.000 title claims abstract description 43
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 32
- 239000010959 steel Substances 0.000 title claims abstract description 32
- 239000002131 composite material Substances 0.000 title claims abstract description 28
- 230000007797 corrosion Effects 0.000 title claims abstract description 16
- 238000005260 corrosion Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000003466 welding Methods 0.000 claims abstract description 20
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 17
- 239000010935 stainless steel Substances 0.000 claims abstract description 17
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims abstract description 6
- 238000000227 grinding Methods 0.000 claims abstract description 6
- 238000005554 pickling Methods 0.000 claims abstract description 5
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims abstract description 4
- 230000007547 defect Effects 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000002253 acid Substances 0.000 claims abstract description 3
- 238000005253 cladding Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 11
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002365 multiple layer Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000013500 performance material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/0805—Flat bars, i.e. having a substantially rectangular cross-section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/06—Metal-working plant comprising a number of associated machines or apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Heat Treatment Of Steel (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a composite rolling method of corrosion-resistant spring flat steel, which comprises the following steps: 1) preparing raw materials: adopting a continuous rolling mill to perform cogging on a 150 × 150 square billet to obtain a phi 70 × 7000mm specification master batch, and taking a 304 austenitic stainless steel pipe with the diameter of phi 66mm as a multilayer; 2) grinding the surface of the master batch to obtain a round bar with the diameter phi of 66, eliminating surface defects and impurities, cladding a stainless steel pipe, and carrying out acid pickling on the round bar by adopting a 12% HCL solution at the temperature of 70 ℃ for 120 min; 3) sleeving the stainless steel composite layer on the outer layer of the master batch, and welding two ends of the composite material by using a vacuum welding machine, wherein a chromium-nickel stainless steel welding rod is selected as a welding material; 4) and (5) carrying out secondary heating and forming rolling to obtain the composite spring flat steel.
Description
Technical Field
The invention relates to a composite rolling method of corrosion-resistant spring flat steel.
Background
In recent years, the sales of medium and heavy commercial vehicles in the same proportion is increased by more than 40%. The spring flat steel for the automobile belongs to high-technology high-added-value steel, is various in types, and becomes the field of key research, development and development of various large steel mills.
The spring flat steel should have excellent comprehensive properties, such as mechanical properties (especially elastic limit, strength limit, yield ratio), anti-ballistic properties (i.e. anti-sag property, also called anti-relaxation property), fatigue properties, hardenability, physicochemical properties (heat resistance, low temperature resistance, oxidation resistance, corrosion resistance, etc.).
Spring flat steel that uses in the existing market all adopts single material, in order to avoid under the moist adverse circumstances such as muddy water, because of the metal takes place to corrode and the fatigue fracture accident that appears, causes huge economic loss. The automobile plate spring mostly adopts surface paint-spraying anticorrosion and antirust technologies, and the durability evaluation of the coating on the surface of the automobile plate spring shows that the coating can protect the plate spring in the initial corrosion stage, but the nonuniform damage of the coating can generate galvanic corrosion to accelerate the corrosion of the damaged part of the coating, and the longer the time required by the failure of the coating is, the more serious the galvanic corrosion degree is, so that the nonuniform corrosion of the automobile plate spring is caused. The automobile plate spring processing process flow comprises the following steps: blanking, drilling, rolling and cutting head, correcting, first sheet of rolling lug, end grinding, quenching, tempering, shot blasting, flaw detection, painting and testing.
The industrial production of clad-rolled steel plates began in the united states of the 30's of the 20 th century. With the increasingly prominent superiority of such performance materials, a composite steel plate mainly made of stainless steel has a strong position in the material industry. The composite steel material has the characteristics of good corrosion resistance, high strength, high thermal conductivity and the like, and also has good economical efficiency. The production process includes explosion method, build-up welding method, metal filling method, rolling method, etc. The rolling method is an ideal production process from the viewpoint of the bonding performance, the dimensional accuracy, the production efficiency, and the like, and the yield thereof is also the highest.
Disclosure of Invention
The invention aims to provide a composite rolling method of corrosion-resistant spring flat steel, which can combine the advantages of mechanical properties and chemical properties of different materials through composite rolling to obtain a product more suitable for market demands.
The technical scheme of the invention is as follows: a composite rolling method of corrosion-resistant spring flat steel is carried out according to the following steps: 1) preparing raw materials: adopting a continuous rolling mill to perform cogging on 150 × 150 square billets to obtain 50CrMnMoVNb master batches with the specification of phi 70 × 7000mm and the linear expansion coefficient of 12.4 × 10-6/° c; using 304 austenitic stainless steel with the diameter of phi 66mm and the linear expansion coefficient of 17.3 multiplied by 10-6The steel pipe at/DEG C is a multilayer;2) grinding the surface of the master batch to a diameter phi 66+0.3 +0.8Removing surface defects and impurities by using a mm round bar, carrying out acid pickling on the stainless steel pipe with a multi-layer structure by using a 70 ℃ 12% HCL solution for 120min, and removing the impurities and an oxide layer on the surface of the stainless steel multi-layer structure; 3) sleeving the stainless steel composite layer on the outer layer of the master batch, and welding two ends of the composite material by using a vacuum welding machine, wherein a chromium-nickel stainless steel welding rod is selected as a welding material; 4) and (3) carrying out secondary heating for forming rolling, wherein the heating temperature is 1160-1120 ℃, the furnace time is 40min, the rolling start temperature is 1050-1020 ℃, and carrying out secondary rolling by adopting an 11-frame continuous rolling mill, wherein the 1# -4# rolling mill passes through the idle rolling mill, the size of a rolled finished product is 10 x 70mm, and the speed of the finished product is 5.21m/s, so that the composite spring flat steel is obtained.
The spring flat steel produced by the method of the invention comprises the following steps:
1) in the aspect of mechanical property, the whole mechanical property (shown in table 1) is obtained by sampling and measuring finished products, and the standard requirement of 50CrMnMoVNb spring flat steel is met.
2) Fatigue performance: about 13 ten thousand times (standard: 8 ten thousand times).
3) The composite rolled spring flat steel has better corrosion resistance.
4) The invention is suitable for the heavy salt alkali environment with the pH value of 9.0-9.6, and the service life of the spring flat steel is prolonged by 3-5 years compared with that of the common spring flat steel.
Detailed Description
A composite rolling method of corrosion-resistant spring flat steel is carried out according to the following steps: 1) preparing raw materials: adopting a continuous rolling mill to perform cogging on 150 × 150 square billets to obtain 50CrMnMoVNb master batches with the specification of phi 70 × 7000mm and the linear expansion coefficient of 12.4 × 10-6/° c; using 304 austenitic stainless steel with the diameter of phi 66mm and the linear expansion coefficient of 17.3 multiplied by 10-6The steel pipe at/DEG C is a multilayer; 2) grinding the surface of the master batch to a diameter phi 66+0.3 +0.8Round rod of mm, eliminating surface defect and impurity, and multiple-layer stainless steel pipe dissolved in 12% HCL at 70 deg.CPickling the solution for 120min to remove impurities and oxide layers on the surface of the stainless steel composite layer; 3) sleeving the stainless steel composite layer on the outer layer of the master batch, and welding two ends of the composite material by using a vacuum welding machine, wherein a chromium-nickel stainless steel welding rod is selected as a welding material; 4) and (3) carrying out secondary heating for forming rolling, wherein the heating temperature is 1160-1120 ℃, the furnace time is 40min, the rolling start temperature is 1050-1020 ℃, and carrying out secondary rolling by adopting an 11-frame continuous rolling mill, wherein the 1# -4# rolling mill passes through the idle rolling mill, the size of a rolled finished product is 10 x 70mm, and the speed of the finished product is 5.21m/s, so that the composite spring flat steel is obtained.
Example (b):
take the production of 10 x 70 specification composite material spring flat steel as an example.
1) Using 150 x 10000mm billets, the heating regime was performed as in table 2, with a furnace time of 90 min. And (4) taking the steel out of the furnace, and descaling with high-pressure water to remove surface iron oxide, wherein the descaling water pressure is 18 MPa.
2) The first cogging was carried out using a 6-stand continuous rolling mill (rolling schedule is shown in Table 3), and the size of the rolled master batch was 70 mm.
3) And grinding the surface of the master batch to obtain a finished product with the size of 66mm and the tolerance size of +0.3 to +0.8 mm.
4) And (3) pickling the 304 austenitic stainless steel multi-layer with the diameter of phi 66 to remove a surface oxide layer and impurities, and pickling with 12% HCL solution at 70 ℃ for 120 min.
5) The master batch is sleeved into a 304 austenitic stainless steel pipe.
6) The composite steel bar is ground at two ends and welded, and a vacuum welder is adopted for welding, so that the vacuum degree is as follows: 10-2～10-3(ii) a Welding materials: chrome-nickel stainless steel welding rod.
7) And (3) putting the composite steel bar into a soaking pit furnace, and carrying out secondary heating at the heating temperature of 1160-1120 ℃, the in-furnace time of 40min and the rolling start temperature of 1050-1020 ℃.
8) And (3) carrying out secondary rolling by adopting an 11-stand continuous rolling mill, wherein a 1# to 4# rolling mill passes through the rolling mill, the rolling program is shown in a table 4, the size of a rolled finished product is 10 x 70mm, and the speed of the finished product is 5.21 m/s.
Claims (1)
1. A composite rolling method of corrosion-resistant spring flat steel is carried out according to the following steps: 1) preparing raw materials: adopting a continuous rolling mill to perform cogging on 150 × 150 square billets to obtain 50CrMnMoVNb master batches with the specification of phi 70 × 7000mm and the linear expansion coefficient of 12.4 × 10-6/° c; using 304 austenitic stainless steel with the diameter of phi 66mm and the linear expansion coefficient of 17.3 multiplied by 10-6The steel pipe at/DEG C is a multilayer; 2) grinding the surface of the master batch to a diameter phi 66+0.3 +0.8Removing surface defects and impurities by using a mm round bar, carrying out acid pickling on the stainless steel pipe with a multi-layer structure by using a 70 ℃ 12% HCL solution for 120min, and removing the impurities and an oxide layer on the surface of the stainless steel multi-layer structure; 3) sleeving the stainless steel composite layer on the outer layer of the master batch, and welding two ends of the composite material by using a vacuum welding machine, wherein a chromium-nickel stainless steel welding rod is selected as a welding material; 4) and (3) carrying out secondary heating for forming rolling, wherein the heating temperature is 1160-1120 ℃, the furnace time is 40min, the rolling start temperature is 1050-1020 ℃, and carrying out secondary rolling by adopting an 11-frame continuous rolling mill, wherein the 1# -4# rolling mill passes through the idle rolling mill, the size of a rolled finished product is 10 x 70mm, and the speed of the finished product is 5.21m/s, so that the composite spring flat steel is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010917590.XA CN112090955A (en) | 2020-09-04 | 2020-09-04 | Composite rolling method of corrosion-resistant spring flat steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010917590.XA CN112090955A (en) | 2020-09-04 | 2020-09-04 | Composite rolling method of corrosion-resistant spring flat steel |
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| Publication Number | Publication Date |
|---|---|
| CN112090955A true CN112090955A (en) | 2020-12-18 |
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|---|---|---|---|
| CN202010917590.XA Withdrawn CN112090955A (en) | 2020-09-04 | 2020-09-04 | Composite rolling method of corrosion-resistant spring flat steel |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE431077B (en) * | 1980-10-01 | 1984-01-16 | Sumitomo Metal Ind | Method for manufacturing a coated steel product having a laminated structure |
| JPH05279738A (en) * | 1992-04-02 | 1993-10-26 | Nippon Steel Corp | Manufacturing method of wear-resistant steel pipe |
| CN106448932A (en) * | 2016-11-22 | 2017-02-22 | 湖南三泰新材料股份有限公司 | Method for preparing copper-clad steel composite material |
| CN106964649A (en) * | 2017-05-03 | 2017-07-21 | 南京工业大学 | Preparation method of high-corrosion-resistance bimetal composite steel bar |
| CN107933013A (en) * | 2017-11-10 | 2018-04-20 | 东北大学 | A kind of stainless steel/carbon vacuum composite reinforcing steel bar and its manufacturing process |
| CN108856288A (en) * | 2018-05-04 | 2018-11-23 | 太原科技大学 | A kind of corrosion resistant structural steel production method |
| CN110524201A (en) * | 2019-09-09 | 2019-12-03 | 新疆八一钢铁股份有限公司 | A kind of sucker rod used under suitable high salinity environment |
-
2020
- 2020-09-04 CN CN202010917590.XA patent/CN112090955A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE431077B (en) * | 1980-10-01 | 1984-01-16 | Sumitomo Metal Ind | Method for manufacturing a coated steel product having a laminated structure |
| JPH05279738A (en) * | 1992-04-02 | 1993-10-26 | Nippon Steel Corp | Manufacturing method of wear-resistant steel pipe |
| CN106448932A (en) * | 2016-11-22 | 2017-02-22 | 湖南三泰新材料股份有限公司 | Method for preparing copper-clad steel composite material |
| CN106964649A (en) * | 2017-05-03 | 2017-07-21 | 南京工业大学 | Preparation method of high-corrosion-resistance bimetal composite steel bar |
| CN107933013A (en) * | 2017-11-10 | 2018-04-20 | 东北大学 | A kind of stainless steel/carbon vacuum composite reinforcing steel bar and its manufacturing process |
| CN108856288A (en) * | 2018-05-04 | 2018-11-23 | 太原科技大学 | A kind of corrosion resistant structural steel production method |
| CN110524201A (en) * | 2019-09-09 | 2019-12-03 | 新疆八一钢铁股份有限公司 | A kind of sucker rod used under suitable high salinity environment |
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Application publication date: 20201218 |
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| WW01 | Invention patent application withdrawn after publication |