CN112222222A - Production process of food-grade large-caliber mirror surface stainless steel seamless steel pipe - Google Patents
Production process of food-grade large-caliber mirror surface stainless steel seamless steel pipe Download PDFInfo
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- CN112222222A CN112222222A CN202010995469.9A CN202010995469A CN112222222A CN 112222222 A CN112222222 A CN 112222222A CN 202010995469 A CN202010995469 A CN 202010995469A CN 112222222 A CN112222222 A CN 112222222A
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- China
- Prior art keywords
- stainless steel
- steel pipe
- degreasing
- mirror surface
- food
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- 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.)
- Pending
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 37
- 239000010959 steel Substances 0.000 title claims abstract description 37
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 36
- 239000010935 stainless steel Substances 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000005238 degreasing Methods 0.000 claims abstract description 57
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 26
- 238000005554 pickling Methods 0.000 claims abstract description 20
- 238000005498 polishing Methods 0.000 claims abstract description 20
- 238000010622 cold drawing Methods 0.000 claims abstract description 13
- 238000005097 cold rolling Methods 0.000 claims abstract description 12
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims abstract description 11
- 238000003723 Smelting Methods 0.000 claims abstract description 5
- 238000010891 electric arc Methods 0.000 claims abstract description 5
- 239000002253 acid Substances 0.000 claims description 21
- 229910017604 nitric acid Inorganic materials 0.000 claims description 21
- 230000001050 lubricating effect Effects 0.000 claims description 14
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/30—Finishing tubes, e.g. sizing, burnishing
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Extraction Processes (AREA)
Abstract
The invention discloses a production process of a food-grade large-caliber mirror surface stainless steel seamless steel pipe, which comprises the following specific steps: the method comprises the steps of smelting an austenitic stainless steel pipe blank by using an electric arc furnace and an electroslag remelting furnace, heating the austenitic stainless steel pipe blank by using a heating furnace, cross-piercing, pickling, heat treatment, cold rolling, degreasing, heat treatment, straightening, pickling, polishing, cold drawing and expanding, degreasing, polishing, heat treatment, pickling, polishing, cold rolling, degreasing, heat treatment, straightening, pickling and polishing, and the steps are sequentially carried out to prepare the large-caliber mirror surface stainless steel seamless steel pipe. The large-caliber mirror surface stainless steel seamless steel pipe produced by the invention can meet the requirements of food-grade stainless steel seamless steel pipes.
Description
Technical Field
The invention relates to the technical field of seamless steel pipes, in particular to a production process of a food-grade large-caliber mirror surface stainless steel seamless steel pipe.
Background
In the field of food production, a large-caliber mirror surface stainless steel seamless steel tube is needed, and the current production process of the large-caliber mirror surface stainless steel seamless steel tube is not available, so that the stainless steel seamless steel tube cannot be applied in the field of food, and therefore, the development of the production process of the food-grade large-caliber mirror surface stainless steel seamless steel tube is very necessary.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a production process of a food-grade large-caliber mirror surface stainless steel seamless steel pipe, and the large-caliber mirror surface stainless steel seamless steel pipe produced by the process can meet the requirements of the food-grade stainless steel seamless steel pipe.
A production process of a food-grade large-caliber mirror surface stainless steel seamless steel pipe is characterized by comprising the following steps of: the method comprises the following specific steps: the method comprises the steps of smelting an austenitic stainless steel pipe blank by using an electric arc furnace and an electroslag remelting furnace, heating the austenitic stainless steel pipe blank by using a heating furnace, cross-piercing, pickling, heat treatment, cold rolling, degreasing, heat treatment, straightening, pickling, polishing, cold drawing and expanding, degreasing, polishing, heat treatment, pickling, polishing, cold rolling, degreasing, heat treatment, straightening, pickling and polishing, and the steps are sequentially carried out to prepare the large-caliber mirror surface stainless steel seamless steel pipe.
And (3) oblique piercing: by adopting an inner pockmark control method, the diameter-length coefficient is controlled to be 0.3-0.5, the elongation coefficient is controlled to be 2.5-2.8, and the opening temperature is controlled to be 1140-1220 ℃.
And (3) heat treatment: high-temperature solution treatment at 980-1020 ℃ for 12-18 min.
Cold drawing: and removing the outer solid lubricating layer during outer diameter drawing, keeping the inner lubricating film, controlling the outer diameter shrinkage rate to be 3-5%, controlling the deformation rate to be 3-6%, and controlling the drawing speed to be 1.2-2 m/min.
Acid washing: nitric acid is adopted, and the concentration is 75-89%.
Degreasing: adopting a secondary degreasing process of rough degreasing and fine degreasing, wherein the rough degreasing comprises the following steps: the acid solution is (12-16%) HF + (8-12%) HNO3The temperature is 48-52 ℃, and the time is 20-24 min; fine degreasing: the acid solution is (6-12%) HF + (7-12%) HNO3The temperature is 35-42 ℃, and the time is 18-24 min.
The nominal outer diameter of the large-caliber mirror surface stainless steel seamless steel pipe is 88-130 mm, and the nominal wall thickness is 0.15-0.85 mm.
The invention has the beneficial effects that:
the method comprises the following specific steps: the method comprises the steps of smelting an austenitic stainless steel pipe blank by using an electric arc furnace and an electroslag remelting furnace, heating the austenitic stainless steel pipe blank by using a heating furnace, cross-piercing, pickling, heat treatment, cold rolling, degreasing, heat treatment, straightening, pickling, polishing, cold drawing and expanding, degreasing, polishing, heat treatment, pickling, polishing, cold rolling, degreasing, heat treatment, straightening, pickling and polishing. Through the processing of the process steps, the food-grade large-caliber mirror surface stainless steel seamless steel pipe can be manufactured and can be used in the field of food production, the austenitic stainless steel circle can be used in the field of food, the large-caliber mirror surface stainless steel seamless steel pipe can be manufactured through oblique piercing, cold rolling, cold drawing and cold rolling, and meanwhile through the processing of other steps, the manufactured large-caliber mirror surface stainless steel seamless steel pipe can be guaranteed to be good in surface quality, free of burrs and accurate in size. By adopting the control method of the inner pits at the tail part of the tubular billet, the inner surface quality and the yield of the cross-piercing tubular billet can be improved, and the inner surface quality and the corrosion resistance of a cold-processed finished tube can be improved.
Detailed Description
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Example 1
A production process of a food-grade large-caliber mirror surface stainless steel seamless steel pipe is characterized by comprising the following steps of: the method comprises the following specific steps: the method comprises the steps of smelting an austenitic stainless steel pipe blank by using an electric arc furnace and an electroslag remelting furnace, heating the austenitic stainless steel pipe blank by using a heating furnace, cross-piercing, pickling, heat treatment, cold rolling, degreasing, heat treatment, straightening, pickling, polishing, cold drawing and expanding, degreasing, polishing, heat treatment, pickling, polishing, cold rolling, degreasing, heat treatment, straightening, pickling and polishing, and the steps are sequentially carried out to prepare the large-caliber mirror surface stainless steel seamless steel pipe.
And (3) oblique piercing: by adopting an inner pockmark control method, the diameter-length coefficient is controlled to be 0.3, the elongation coefficient is controlled to be 2.5, and the opening temperature is controlled to be 1140 ℃.
And (3) heat treatment: high-temperature solution treatment at 980 deg.C for 18 min.
Cold drawing: and removing the outer solid lubricating layer during outer diameter drawing, keeping the inner lubricating film, controlling the outer diameter shrinkage rate to be 3%, controlling the deformation rate to be 3%, and controlling the drawing speed to be 1.2 m/min.
Acid washing: nitric acid was used at a concentration of 75%.
Degreasing: adopting a secondary degreasing process of rough degreasing and fine degreasing, wherein the rough degreasing comprises the following steps: the acid solution is 12 percent of HF and 8 percent of HNO3The temperature is 48 ℃, and the time is 24 min; fine degreasing: the acid solution is 6 percent of HF and 7 percent of HNO3The temperature is 35 ℃ and the time is 24 min.
The nominal outer diameter of the large-caliber mirror surface stainless steel seamless steel pipe is 88mm, and the nominal wall thickness is 0.15 mm.
Example 2
This example is substantially the same as example 1, except that: and (3) oblique piercing: by adopting an inner pockmark control method, the diameter-length coefficient is controlled to be 0.5, the elongation coefficient is controlled to be 2.8, and the opening temperature is controlled to be 1220 ℃.
And (3) heat treatment: high-temperature solution treatment at 1020 deg.C for 18 min.
Cold drawing: and removing the outer solid lubricating layer during outer diameter drawing, keeping the inner lubricating film, controlling the outer diameter shrinkage rate to be 5%, controlling the deformation rate to be 6%, and controlling the drawing speed to be 2 m/min.
Acid washing: nitric acid was used at a concentration of 89%.
Degreasing: adopting a secondary degreasing process of rough degreasing and fine degreasing, wherein the rough degreasing comprises the following steps: the acid solution is 16 percent of HF and 12 percent of HNO3The temperature is 52 ℃, and the time is 20 min; fine degreasing: the acid solution is 12 percent of HF and 12 percent of HNO3The temperature is 42 ℃ and the time is 18 min.
The nominal outer diameter of the large-caliber mirror surface stainless steel seamless steel pipe is 130mm, and the nominal wall thickness is 0.85 mm.
Example 3
This example is substantially the same as example 1, except that: and (3) oblique piercing: by adopting an inner pockmark control method, the diameter-length coefficient is controlled to be 0.35, the elongation coefficient is controlled to be 2.6, and the opening temperature is controlled to be 1150 ℃.
And (3) heat treatment: high-temperature solution treatment at 990 deg.C for 14 min.
Cold drawing: and removing the outer solid lubricating layer during outer diameter drawing, keeping the inner lubricating film, controlling the outer diameter shrinkage rate to be 3.5%, controlling the deformation rate to be 4%, and controlling the drawing speed to be 1.3 m/min.
Acid washing: nitric acid was used at a concentration of 76%.
Degreasing: adopting a secondary degreasing process of rough degreasing and fine degreasing, wherein the rough degreasing comprises the following steps: the acid solution is 13 percent of HF and 9 percent of HNO3The temperature is 49 ℃, and the time is 23 min; fine degreasing: the acid solution is 7 percent of HF and 8 percent of HNO3The temperature was 36 ℃ and the time 23 min.
The nominal outer diameter of the large-caliber mirror surface stainless steel seamless steel pipe is 92mm, and the nominal wall thickness is 0.25 mm.
Example 4
This example is substantially the same as example 1, except that: and (3) oblique piercing: by adopting an inner pockmark control method, the diameter-length coefficient is controlled to be 0.4, the elongation coefficient is controlled to be 2.7, and the opening temperature is controlled to be 1160 ℃.
And (3) heat treatment: high-temperature solution treatment at 1000 deg.C for 14 min.
Cold drawing: and removing the outer solid lubricating layer during outer diameter drawing, keeping the inner lubricating film, controlling the outer diameter shrinkage rate to be 4%, controlling the deformation rate to be 5%, and controlling the drawing speed to be 2 m/min.
Acid washing: nitric acid was used at a concentration of 89%.
Degreasing: adopting a secondary degreasing process of rough degreasing and fine degreasing, wherein the rough degreasing comprises the following steps: the acid solution is 15% HF + (8-12%) HNO3The temperature is 50 ℃, and the time is 22 min; fine degreasing: the acid solution is 9 percent of HF and 9 percent of HNO3The temperature is 38 ℃ and the time is 20 min.
The nominal outer diameter of the large-caliber mirror surface stainless steel seamless steel pipe is 100mm, and the nominal wall thickness is 0.55 mm.
Example 5
This example is substantially the same as example 1, except that: and (3) oblique piercing: by adopting an inner pockmark control method, the diameter-length coefficient is controlled to be 0.3, the elongation coefficient is controlled to be 2.8, and the opening temperature is controlled to be 1220 ℃.
And (3) heat treatment: high-temperature solution treatment at 1010 deg.C for 13 min.
Cold drawing: and removing the outer solid lubricating layer during outer diameter drawing, keeping the inner lubricating film, controlling the outer diameter shrinkage rate to be 4.5%, controlling the deformation rate to be 5.5% and controlling the drawing speed to be 1.8 m/min.
Acid washing: nitric acid was used at a concentration of 85%.
Degreasing: adopting a secondary degreasing process of rough degreasing and fine degreasing, wherein the rough degreasing comprises the following steps: the acid solution is 14 percent of HF and 10 percent of HNO3The temperature is 51 ℃, and the time is 23 min; fine degreasing: the acid solution is 11 percent of HF and 10 percent of HNO3The temperature is 42 ℃ and the time is 18 min.
The nominal outer diameter of the large-caliber mirror surface stainless steel seamless steel pipe is 100mm, and the nominal wall thickness is 0.85 mm.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (7)
1. A production process of a food-grade large-caliber mirror surface stainless steel seamless steel pipe is characterized by comprising the following steps of: the method comprises the following specific steps: the method comprises the steps of smelting an austenitic stainless steel pipe blank by using an electric arc furnace and an electroslag remelting furnace, heating the austenitic stainless steel pipe blank by using a heating furnace, cross-piercing, pickling, heat treatment, cold rolling, degreasing, heat treatment, straightening, pickling, polishing, cold drawing and expanding, degreasing, polishing, heat treatment, pickling, polishing, cold rolling, degreasing, heat treatment, straightening, pickling and polishing, and the steps are sequentially carried out to prepare the large-caliber mirror surface stainless steel seamless steel pipe.
2. The production process of the food-grade large-caliber mirror surface stainless steel seamless steel pipe according to claim 1, characterized in that: and (3) oblique piercing: by adopting an inner pockmark control method, the diameter-length coefficient is controlled to be 0.3-0.5, the elongation coefficient is controlled to be 2.5-2.8, and the opening temperature is controlled to be 1140-1220 ℃.
3. The production process of the food-grade large-caliber mirror surface stainless steel seamless steel pipe according to claim 1, characterized in that: and (3) heat treatment: high-temperature solution treatment at 980-1020 ℃ for 12-18 min.
4. The production process of the food-grade large-caliber mirror surface stainless steel seamless steel pipe according to claim 1, characterized in that: cold drawing: and removing the outer solid lubricating layer during outer diameter drawing, keeping the inner lubricating film, controlling the outer diameter shrinkage rate to be 3-5%, controlling the deformation rate to be 3-6%, and controlling the drawing speed to be 1.2-2 m/min.
5. The production process of the food-grade large-caliber mirror surface stainless steel seamless steel pipe according to claim 1, characterized in that: acid washing: nitric acid is adopted, and the concentration is 75-89%.
6. The production process of the food-grade large-caliber mirror surface stainless steel seamless steel pipe according to claim 1, characterized in that: degreasing: adopting a secondary degreasing process of rough degreasing and fine degreasing, wherein the rough degreasing comprises the following steps: the acid solution is (12-16%) HF + (8-12%) HNO3The temperature is 48-52 ℃, and the time is 20-24 min; fine degreasing: the acid solution is (6-12%) HF + (7-12%) HNO3The temperature is 35-42 ℃, and the time is 18-24 min.
7. The production process of the food-grade large-caliber mirror surface stainless steel seamless steel pipe according to claim 1, characterized in that: the nominal outer diameter of the large-caliber mirror surface stainless steel seamless steel pipe is 88-130 mm, and the nominal wall thickness is 0.15-0.85 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010995469.9A CN112222222A (en) | 2020-09-21 | 2020-09-21 | Production process of food-grade large-caliber mirror surface stainless steel seamless steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010995469.9A CN112222222A (en) | 2020-09-21 | 2020-09-21 | Production process of food-grade large-caliber mirror surface stainless steel seamless steel pipe |
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| Publication Number | Publication Date |
|---|---|
| CN112222222A true CN112222222A (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010995469.9A Pending CN112222222A (en) | 2020-09-21 | 2020-09-21 | Production process of food-grade large-caliber mirror surface stainless steel seamless steel pipe |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102649211A (en) * | 2011-02-24 | 2012-08-29 | 宝山钢铁股份有限公司 | Manufacturing method of stainless steel seamless steel tube |
| CN103710637A (en) * | 2013-12-26 | 2014-04-09 | 浙江德传管业有限公司 | Thin-wall super duplex stainless steel seamless tube and production technology thereof |
| CN106378364A (en) * | 2015-07-28 | 2017-02-08 | 常州市联谊特种不锈钢管有限公司 | Production method for corrugated pipe blank extremely-thin wall stainless steel seamless steel pipe for nuclear power |
| CN107214480A (en) * | 2017-07-20 | 2017-09-29 | 繁昌县华特机械制造有限公司 | A kind of manufacture method of large-caliber stainless steel seamless pipe |
| CN110586654A (en) * | 2019-09-06 | 2019-12-20 | 山西太钢不锈钢股份有限公司 | Cold machining manufacturing method of high-nickel alloy N08810 large-caliber seamless steel pipe |
-
2020
- 2020-09-21 CN CN202010995469.9A patent/CN112222222A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102649211A (en) * | 2011-02-24 | 2012-08-29 | 宝山钢铁股份有限公司 | Manufacturing method of stainless steel seamless steel tube |
| CN103710637A (en) * | 2013-12-26 | 2014-04-09 | 浙江德传管业有限公司 | Thin-wall super duplex stainless steel seamless tube and production technology thereof |
| CN106378364A (en) * | 2015-07-28 | 2017-02-08 | 常州市联谊特种不锈钢管有限公司 | Production method for corrugated pipe blank extremely-thin wall stainless steel seamless steel pipe for nuclear power |
| CN107214480A (en) * | 2017-07-20 | 2017-09-29 | 繁昌县华特机械制造有限公司 | A kind of manufacture method of large-caliber stainless steel seamless pipe |
| CN110586654A (en) * | 2019-09-06 | 2019-12-20 | 山西太钢不锈钢股份有限公司 | Cold machining manufacturing method of high-nickel alloy N08810 large-caliber seamless steel pipe |
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Application publication date: 20210115 |