CN103695799B - A kind of production technology of ultra-fine grain heat-resistance stainless steel seamless steel pipe - Google Patents
A kind of production technology of ultra-fine grain heat-resistance stainless steel seamless steel pipe Download PDFInfo
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Abstract
The invention discloses the production technology of a kind of ultra-fine grain heat-resistance stainless steel seamless steel pipe, comprise the steps that first round steel prepares, in round steel, the mass ratio of each chemical composition is: C:0.04～0.01 part；Si :≤0.75 part；Mn :≤2 parts；S :≤0.015 part；P :≤0.03；Ni:9～12 parts；Cr:17～19 parts；Nb:0.8～1.1 parts, then smelting is passed sequentially through, peeling, hot-puncturing process, cold deformation, pickling for the first time, hot solution treatment, pickling for the second time, finished product warehouse-in is obtained after inspection, each component and content in the present invention all select through great many of experiments and design, thus reach optimal coordination technique effect, pass through solution heat treatment, even if making the present invention also can obtain microlite by the precipitation of niobium carbide in higher solution treatment, so that the steel pipe that the present invention produces not only has fabulous corrosion resistance oxidation resistance in steam energy in hot environment, and compared with prior art, product allowable stress is high by more than 20%, present invention reduces difficulty of processing, can conveniently realize large-scale production.
Description
[technical field]
The present invention relates to stainless-steel seamless pipe manufacturing technology field, be specifically related to a kind of ultra-fine grain heat-resisting not
The production technology of rust steel seamless steel tube.
[background technology]
TP347HFG (08Cr18Ni 11NbFG) belongs to high-carbon Cr-Ni austenitic stainless steel Han niobium, due to containing steady
Surely changing element nb, its intergranular corrosion resistance and Nai Duo sulphuric acid intergranular stress corrosion are functional, at acid, alkali, salt
Close with the 18-8 austenitic stainless steel containing Ti Deng its anti-corrosion row in corrosive medium, be therefore widely used in boiler,
The industry such as generating, oil, chemical industry, synthetic fibers, food, papermaking.Owing to Nb relatively Ti is unlikely to be burnt,
This steel grade can be used as again welding the core wire of chromiumnickel austenite stainless steel.This steel grade is higher higher than 316 cordings have
Temperature intensity and more preferable high temperature oxidation resistance, so using frequently as refractory steel again.
Stainless steel has a wide range of applications in occasions such as high-pressure boiler, high pressure heat exchanger and pressurized high-temperature pipes.
But existing stainless steel majority is TP347H, its grain size progression relatively low (GS.N04～5), thus reduce
TP347H stainless steel corrosion resistance in hot environment and resistance to steam oxidation, reduce high temperature resistance simultaneously
The characteristic property of creep stress, finished product is in above-mentioned application, because of the environmental effect by High Temperature High Pressure, system
The oxidation having in various degree is peeled off by the pipe portion inwall of part, and resistance to steam oxidation and high temperature creep-resisting stress will
Go down, along with the aggravation of the oxidation extent of exfoliation of tube wall, not only make product pressurized creep-resistant property decline, and
Oxide layer tends to vary with the flowing of steam pressure strength makes it gradually long-pending filter in the bending part in product pipe portion, makes pipeline
Block and cause equipment fault.It addition, its oxidation stratum disjunction can be carried with the flowing of steam gas equally
Enter steam turbine internal works, cause work safety accident, thus cause bigger economic loss.
[summary of the invention]
The purpose of the present invention solves the problems of the prior art exactly, proposes a kind of ultra-fine grain heat-resistance stainless steel
The production technology of seamless steel pipe, the method can improve the grain size of stainless-steel seamless pipe, improves thermostability
Can, reduce difficulty of processing, facilitate large-scale production.
For achieving the above object, the present invention proposes the production of a kind of ultra-fine grain heat-resistance stainless steel seamless steel pipe
Technique, comprises the steps:
A) round steel prepares: in round steel, the mass ratio of each chemical composition is: C:0.04～0.01 part；Si :≤
0.75 part；Mn :≤2 parts；S :≤0.015 part；P :≤0.03；Ni:9～12 parts；Cr:17～19
Part；Nb:0.8～1.1 parts；
B) smelt: the round steel in step a) is smelted into pipe；
C) peeling: by the pipe in step b) by specification peeling, controls external diameter, eliminates surface defect；
D) hot-puncturing process: the pipe that step c) obtains is put in heating furnace heat, use molybdenio come directly towards into
Eleven punch 11, carries out insulation and obtains pipe of boring a hole after completing perforation, the temperature of described molybdenio top is more than pipe
Temperature more than 100 DEG C, described heating-up temperature is 1150～1200 DEG C, and heat time heating time is 95min, temperature retention time
For 20min；
E) cold deformation: use less than 60% cold deformation to perforation pipe carry out cold rolling and drawing deformation；
F) pickling for the first time: use HF and HNO of 25～40 DEG C3Mixed acid carry out pickling, pickling time
Being 3～4h, in mixed acid, the mass ratio of each component is: HNO3: 22～25 parts；HF:6～8 parts；Its
Remaining is H2O；
G) solution heat treatment: use syllogic annealing device that goods carry out heat treatment, described syllogic
Annealing device includes preheating section, bringing-up section and soaking zone, and goods obtain finished product solid solution after carrying out heat treatment,
The most stabilized process of finished product solid solution, in described annealing device, the temperature of preheating section is 1020～1060 DEG C,
The temperature of bringing-up section is 1170～1200 DEG C, and the temperature of soaking zone is 1170～1200, stabilizing treatment
Temperature is 890～930 DEG C；
H) pickling for the second time: using the mixed acid in step f) to carry out pickling, pickling time is 5～6h,
The solution temperature of mixed acid is 30～45 DEG C,；
J) inspection: by putting in storage after nondestructiving inspecting test.
As preferably, in described step a), the mass ratio of each chemical composition is: C:0.04 part；Si:0.75
Part；Mn:2 part；S:0.015 part；P:0.03；Ni:12 part；Cr:19 part；Nb:1.1 part.
As preferably, in described step a), the mass ratio of each chemical composition is: C:0.035 part；Si:0.65
Part；Mn:1.6 part；S:0.01 part；P:0.02；Ni:11 part；Cr:18 part；Nb:0.9 part.
As preferably, in described step a), the mass ratio of each chemical composition is: C:0.01 part；Si:0.2
Part；Mn :≤1.8 parts；S:0.005 part；P:0.01；Ni:9 part；Cr:17 part；Nb:0.8 part.
Beneficial effects of the present invention: each component and content in the present invention all select through great many of experiments and sets
Meter, so that each component and content reach optimal coordination technique effect, passes through solution heat treatment so that
Even if the present invention also can obtain microlite by the precipitation of niobium carbide in higher solution treatment, so that this
The steel pipe that invention produces not only has fabulous corrosion resistance oxidation resistance in steam energy in hot environment, and
Compared with prior art, product allowable stress is high by more than 20%, present invention reduces difficulty of processing, can facilitate
Realize large-scale production.
[detailed description of the invention]
The present invention proposes the production technology of a kind of ultra-fine grain heat-resistance stainless steel seamless steel pipe, comprises the steps:
Comprise the steps:
A) round steel prepares: in round steel, the mass ratio of each chemical composition is: C:0.04～0.01 part；Si :≤
0.75 part；Mn :≤2 parts；S :≤0.015 part；P :≤0.03；Ni:9～12 parts；Cr:17～19
Part；Nb:0.8～1.1 parts；
B) smelt: the round steel in step a) is smelted into pipe；
C) peeling: by the pipe in step b) by specification peeling, controls external diameter, eliminates surface defect；
D) hot-puncturing process: put into by the pipe that step c) obtains in heating furnace and heat, uses molybdenio top to carry out
Perforation, carries out insulation and obtains pipe of boring a hole after completing perforation, the temperature of molybdenio top is more than the temperature 100 of pipe
More than DEG C, preventing excessive temperature differentials from producing internal fissure, optimum heating temperature is 1150～1200 DEG C, most preferably heats
Time is 95min, and optimal temperature retention time is 20min.；
E) cold deformation: use less than 60% cold deformation to perforation pipe carry out cold rolling and drawing deformation；
F) pickling for the first time: use HF and HNO of 25～40 DEG C3Mixed acid carry out pickling, utilize mixing
The oxide skin in steel tube surface and corrosion thing are removed in acid, and pickling time is 3～4h, the matter of each component in mixed acid
Amount ratio is: HNO3: 22～25 parts；HF:6～8 parts；Remaining is H2O, is effectively shortened in acid cleaning process
Production cycle and production cost；
G) solution heat treatment: use syllogic annealing device that goods carry out heat treatment, described syllogic
Annealing device includes preheating section, bringing-up section and soaking zone, and goods obtain finished product solid solution after carrying out heat treatment,
In annealing device, the optimum temperature of preheating section is 1020～1060 DEG C, the optimum temperature of bringing-up section be 1170～
1200 DEG C, the optimum temperature of soaking zone is 1170～1200 DEG C, the most stabilized process of finished product solid solution, stable
The optimum temperature that change processes is 890～930 DEG C, allows titanium and niobium be sufficiently formed highly stable titanium carbide and carbonization
Niobium, obtains microlite by the precipitation of niobium carbide；
H) pickling for the second time: use the mixed acid in step f) to carry out pickling, utilizes mixed acid to remove steel pipe
Oxide skin on surface and corrosion thing, pickling time is 5～6h, and the solution temperature of mixed acid is 30～45 DEG C,
The production cycle being effectively shortened in acid cleaning process and production cost；
J) inspection: by putting in storage after nondestructiving inspecting test.
The specific embodiment of the present invention is:
Embodiment 1:
In described step a), the mass ratio of each chemical composition is: C:0.04 part；Si:0.75 part；Mn:
2 parts；S:0.015 part；P:0.03；Ni:12 part；Cr:19 part；Nb:1.1 part, described step
In rapid mixed acid f), the mass ratio of each component is: HNO3: 25 parts；HF:8 part；Remaining is H2O。
Embodiment 2:
In described step a), the mass ratio of each chemical composition is: C:0.035 part；Si:0.65 part；Mn:
1.6 part；S:0.01 part；P:0.02；Ni:11 part；Cr:18 part；Nb:0.9 part, described step
In rapid mixed acid f), the mass ratio of each component is: HNO3: 23 parts；HF:7 part；Remaining is H2O。
Embodiment 3:
In described step a), the mass ratio of each chemical composition is: C:0.01 part；Si:0.2 part；Mn :≤
1.8 part；S:0.005 part；P:0.01；Ni:9 part；Cr:17 part；Nb:0.8 part, described step
In rapid mixed acid f), the mass ratio of each component is: HNO3: 22 parts；HF:6 part；Remaining is H2O。
Above-described embodiment is the description of the invention, is not limitation of the invention, any simple to the present invention
Scheme after conversion belongs to protection scope of the present invention.
Claims (4)
1. the production technology of a ultra-fine grain heat-resistance stainless steel seamless steel pipe, it is characterised in that: comprise the steps:
A) round steel prepares: in round steel, the mass ratio of each chemical composition is: C:0.04～0.01 part；Si :≤
0.75 part；Mn :≤2 parts；S :≤0.015 part；P :≤0.03；Ni:9～12 parts；Cr:17～19
Part；Nb:0.8～1.1 parts；
B) smelt: the round steel in step a) is smelted into pipe；
C) peeling: by the pipe in step b) by specification peeling, controls external diameter, eliminates surface defect；
D) hot-puncturing process: the pipe that step c) obtains is put in heating furnace heat, use molybdenio come directly towards into
Eleven punch 11, carries out insulation and obtains pipe of boring a hole after completing perforation, the temperature of described molybdenio top is more than pipe
Temperature more than 100 DEG C, described heating-up temperature is 1150～1200 DEG C, and heat time heating time is 95min, temperature retention time
For 20min；
E) cold deformation: use less than 60% cold deformation to perforation pipe carry out cold rolling and drawing deformation；
F) pickling for the first time: use HF and HNO of 25～40 DEG C3Mixed acid carry out pickling, pickling time
Being 3～4h, in mixed acid, the mass ratio of each component is: HNO3: 22～25 parts；HF:6～8 parts；Its
Remaining is H2O；
G) solution heat treatment: use syllogic annealing device that goods carry out heat treatment, described syllogic
Annealing device includes preheating section, bringing-up section and soaking zone, and goods obtain finished product solid solution after carrying out heat treatment,
The most stabilized process of finished product solid solution, in described annealing device, the temperature of preheating section is 1020～1060 DEG C,
The temperature of bringing-up section is 1170～1200 DEG C, and the temperature of soaking zone is 1170～1200, stabilizing treatment
Temperature is 890～930 DEG C；
H) pickling for the second time: using the mixed acid in step f) to carry out pickling, pickling time is 5～6h,
The solution temperature of mixed acid is 30～45 DEG C；
J) inspection: by putting in storage after nondestructiving inspecting test.
The production technology of a kind of ultra-fine grain heat-resistance stainless steel seamless steel pipe the most as claimed in claim 1, its feature
It is: in described step a), the mass ratio of each chemical composition is: C:0.04 part；Si:0.75 part；
Mn:2 part；S:0.015 part；P:0.03；Ni:12 part；Cr:19 part；Nb:1.1 part.
The production technology of a kind of ultra-fine grain heat-resistance stainless steel seamless steel pipe the most as claimed in claim 1, its feature
It is: in described step a), the mass ratio of each chemical composition is: C:0.035 part；Si:0.65 part；
Mn:1.6 part；S:0.01 part；P:0.02；Ni:11 part；Cr:18 part；Nb:0.9 part.
The production technology of a kind of ultra-fine grain heat-resistance stainless steel seamless steel pipe the most as claimed in claim 1, its feature
It is: in described step a), the mass ratio of each chemical composition is: C:0.01 part；Si:0.2 part；
Mn :≤1.8 parts；S:0.005 part；P:0.01；Ni:9 part；Cr:17 part；Nb:0.8 part.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105018702A (en) * | 2015-08-04 | 2015-11-04 | 浙江中达特钢股份有限公司 | Technological method for stainless steel seamless steel tubes for heat exchangers |
| CN108220572B (en) * | 2017-12-22 | 2019-09-10 | 杭州杭锅工业锅炉有限公司 | Austenitic stainless steel pipe piece elbow local solution treating method and its device |
| CN108723112A (en) * | 2018-05-25 | 2018-11-02 | 无锡市新峰管业有限公司 | The super wall thickness seam-less T-joint pipe fitting moulding process of high-pressure hydrogenation heavy caliber |
| CN110923726A (en) * | 2019-11-13 | 2020-03-27 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Production process of high-quality stainless steel medium plate for nuclear |
| CN111705198B (en) * | 2020-06-08 | 2022-01-25 | 常州大学 | Production process method for improving corrosion resistance of TP347HFG steel seamless steel pipe |
| CN111893259A (en) * | 2020-08-14 | 2020-11-06 | 山西太钢不锈钢股份有限公司 | High-temperature solution treatment method for 347H medium plate |
| CN112371753B (en) * | 2020-11-06 | 2022-09-06 | 河北恒通管件集团有限公司 | Processing technology of hydrogen high-pressure large-caliber thick-wall nickel alloy pipe fitting |
| CN112281084B (en) * | 2020-11-06 | 2022-02-08 | 河北恒通管件集团有限公司 | Processing technology of hydrogen-contacting high-pressure large-caliber thick-wall stainless steel pipe fitting |
| CN115341143A (en) * | 2022-08-05 | 2022-11-15 | 江苏武进不锈股份有限公司 | Extra-thick-wall large-caliber stainless steel seamless pipe and preparation method thereof |
| CN115401416B (en) * | 2022-09-08 | 2023-12-19 | 四川英拓金属材料有限公司 | Preparation method of nickel-based powder superalloy cold-rolled pipe difficult to deform |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353769A (en) * | 2007-07-26 | 2009-01-28 | 傅丰仁 | Chromium 23 nickel 6 ferrite-austenitic stainless steel pipe and fabrication process thereof |
| CN101665891A (en) * | 2009-08-29 | 2010-03-10 | 浙江久立特材科技股份有限公司 | Stainless heat-resistant alloy steel seamless steel tube and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3758508B2 (en) * | 2001-02-13 | 2006-03-22 | 住友金属工業株式会社 | Manufacturing method of duplex stainless steel pipe |
-
2013
- 2013-12-26 CN CN201310732191.6A patent/CN103695799B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353769A (en) * | 2007-07-26 | 2009-01-28 | 傅丰仁 | Chromium 23 nickel 6 ferrite-austenitic stainless steel pipe and fabrication process thereof |
| CN101665891A (en) * | 2009-08-29 | 2010-03-10 | 浙江久立特材科技股份有限公司 | Stainless heat-resistant alloy steel seamless steel tube and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 固溶热处理对1Gr19Ni11Nb钢持久强度的影响;彭孙鸿;《特殊钢》;19950430;第16卷(第2期);第10-12页 * |
| 太钢1Cr19Ni11Nb不锈钢无缝管的研制;方旭东等;《轧钢》;20061231;第23卷(第6期);第23页左栏第11-15行、第24页左栏第2.2节及表1 * |
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