CN105441810A - A manufacturing process of a high-pressure boiler steel pipe - Google Patents
A manufacturing process of a high-pressure boiler steel pipe Download PDFInfo
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- CN105441810A CN105441810A CN201410425252.9A CN201410425252A CN105441810A CN 105441810 A CN105441810 A CN 105441810A CN 201410425252 A CN201410425252 A CN 201410425252A CN 105441810 A CN105441810 A CN 105441810A
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Abstract
A manufacturing process of a high-pressure boiler steel pipe is disclosed. The process includes (1) a step of material smelting, namely a step of subjecting a raw material to blast furnace molten iron smelting, converter smelting and molten iron smelting, and performing continuous casting to form a round billet, (2) a step of billet punching, (3) a step of tube rolling and tubulating, (4) a step of heating processing of a steel tube, and (5) subjecting the steel tube to nondestructive testing and acceptance inspection, packaging and putting the steel tube in storage. The material for manufacturing the steel tube is T23 steel, and components of the material are optimized and controlled so as to allow the material to have better welding properties, high-temperature stress rupture strength and plasticity. Technical indexes and performances of the steel tube manufactured by the process meet requirements of the ASMESA-213 standard. The steel tube is excellent in oxidation resistance. Values of stress rupture strength extrapolating to one hundred thousand hours of the steel tube at 550 DEG C, 600 DEG C and 650 DEG C are respectively 123 MPa, 81 MPa and 33 MPa, which exceed the specified value range in the ASMECodecase2199-1. The process is suitable for popularization in production industries of boiler steel tubes.
Description
Technical field
The present invention relates to the manufacture of boiler, is a kind of Hi-pressure Boiler Tube manufacturing process in particular.
Background technology
Seamless steel tube for boiler refers to both ends open and has hollow section, the larger steel of its length and periphery, weldless steel tube and Welded Steel Pipe can be divided into by production method, the specification of seamless steel tube for boiler represents by physical dimension (as external diameter or the length of side) and wall thickness, its size range is very wide, and the kapillary very little from diameter is until diameter reaches the large-diameter pipe of several meters.General boi1er tube is mainly used to the overheated steam pipe manufacturing water wall tube, boiling water tube, overheated steam pipe, locomotive boiler, large and small smoke pipe and generating tube etc.Application number is that 201310031375.X discloses a kind of low-alloy high-pressure boiler steel pipe manufacturing method, the steel pipe that method is made thus has good strength and toughness and mechanical property, and good high temperature resistant mechanical property, but this technique is comparatively loaded down with trivial details, the material adopted is Cr-Mo steel alloy, production cost is higher, and the life cycle of tubing and safety performance need to improve.
Summary of the invention
For the deficiency that prior art exists, the invention provides a kind of high-pressure boiler steel pipe manufacturer.
For realizing object of the present invention, technical scheme of the present invention is as follows:
1. a Hi-pressure Boiler Tube manufacturing process, is characterized in that, the material manufacturing steel pipe is T23 steel, and its specific chemical composition is as follows:
Carbon 0.04%-0.10%, manganese 0.10%-0.60%, phosphorus 0.01%-0.03%, sulphur 0.008%-0.01%, silicon 0.3%-0.5%, chromium 1.90%-2.60%, molybdenum 0.05%-0.3%, vanadium 0.2%-0.3%, tungsten 1.45%-1.75%, niobium 0.02%-0.08%, aluminium 0.01%-0.03%;
2. use material described in claim 1 to manufacture a method for Hi-pressure Boiler Tube, it is characterized in that, its processing step is as follows:
(1) smelting technology of material: raw material is after blast-melted smelting, converter smelting, smelting molten steel, and continuous casting forms round steel billet;
(2) perforated steel billit technique: after steel billet adopts ring furnace heating, enters conic perforator perforation, and the temperature during perforation of its round steel billet is 1200 DEG C-1260 DEG C;
(3) tube rolling and tube-making process: rear employing of having bored a hole is micro-draws steel rolling rolling, and during tube rolling, temperature is 1050 DEG C-1150 DEG C, then through process furnace heating after through stretch-reducing mill wroughtsteel pipe to final size, tension reducing temperature controls at 820 DEG C-900 DEG C;
(4) process for heat treatment of steel pipe: high tempering pre-treatment is carried out to tube rolling, after having processed, air cooling is to room temperature, afterwards steel pipe is heated to more than complete austenitizing temperature AC3 15 DEG C, cold-water quench after coming out of the stove, steel pipe after quenching reenters tempering stove temper, and air cooling of then coming out of the stove is to room temperature;
(5) nondestructive test of steel pipe, examination and packaging warehouse-in.
Preferably, after step described in claim 2 (1) Raw enters converter, carry out oxygen blast denitrogenation intensification, the smelting later stage adds ferrosilicon, ferromanganese and molybdenum-iron deoxidation alloying, control the composition of p and s, prevent molten steel peroxidation, tapping temperature controls at 1600 DEG C-1630 DEG C.
Preferably, step described in claim 2 (1) continuous casting of molten steel becomes in steel billet process, and liquid steel temperature controls at 1550 DEG C-1580 DEG C, superheating temperature Δ T=30 DEG C, and pulling rate is still in 0.7m/min, and straightening temperature is 950 DEG C.
Preferably, steel pipe aligning operation is increased between step described in claim 2 (4) and (5).
Preferably, high tempering pre-treatment in step described in claim 2 (4), treatment temp controls at 650 DEG C, insulation 30min.
Preferably, the temperature of carrying out tempering in step described in claim 2 (4) after quenching controls at 580 DEG C, insulation 80min.
Beneficial effect: what the present invention manufactured that the material of steel pipe adopts is a kind of T23 steel, and is optimized its composition and controls, makes material have better welding property and creep rupture strength and moulding.The technique that the present invention manufactures seamless steel tube for boiler comprises the smelting of material, perforated steel billit, tube rolling and tubulation, Steel Pipe Heat process, strict regulation is had to the parameter of program each in production process, the steel pipe all technical that technique is obtained thus and performance all can meet ASMESA-213 standard-required, its antioxidant property is superior, steel pipe 550 DEG C again, 600 DEG C, 650 DEG C, 100000 h creep rupture strength extrapolated values are respectively 123,81,33MPa, all more than ASMECodecase2199-1 prescribed value scope, be suitable for promoting in each seamless steel tube for boiler manufacture.
Embodiment
The technique means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
embodiment 1
1. a Hi-pressure Boiler Tube manufacturing process, is characterized in that, the material manufacturing steel pipe is T23 steel, and its specific chemical composition is as follows:
Carbon 0.04%, manganese 0.10%, phosphorus 0.01%, sulphur 0.008%, silicon 0.3%, chromium 1.90%, molybdenum 0.05%, vanadium 0.2%, tungsten 1.45%, niobium 0.02%, aluminium 0.01%;
2. use material described in claim 1 to manufacture a method for Hi-pressure Boiler Tube, it is characterized in that, its processing step is as follows:
(1) smelting technology of material: raw material is after blast-melted smelting, converter smelting, smelting molten steel, continuous casting forms round steel billet, after raw material enters converter, carry out oxygen blast denitrogenation intensification, the smelting later stage adds ferrosilicon, ferromanganese and molybdenum-iron deoxidation alloying, control the composition of p and s, prevent molten steel peroxidation, tapping temperature controls at 1600 DEG C.Continuous casting of molten steel becomes in steel billet process, and liquid steel temperature controls at 1550 DEG C, superheating temperature Δ T=30 DEG C, and pulling rate is still in 0.7m/min, and straightening temperature is 950 DEG C;
(2) perforated steel billit technique: after steel billet adopts ring furnace heating, enters conic perforator perforation, and the temperature during perforation of its round steel billet is 1200 DEG C;
(3) tube rolling and tube-making process: rear employing of having bored a hole is micro-draws steel rolling rolling, and during tube rolling, temperature is 1050 DEG C, then control at 820 DEG C through stretch-reducing mill wroughtsteel pipe to final size tension reducing temperature after process furnace heating;
(4) process for heat treatment of steel pipe: high tempering pre-treatment is carried out to tube rolling, after having processed, air cooling is to room temperature, afterwards steel pipe is heated to more than complete austenitizing temperature AC3 15 DEG C, cold-water quench after coming out of the stove, steel pipe after quenching reenters tempering stove temper, air cooling of then coming out of the stove to room temperature, wherein high tempering pre-treatment, treatment temp controls at 650 DEG C, insulation 30min.The temperature of carrying out tempering after quenching controls at 580 DEG C, insulation 80min;
(5) nondestructive test of steel pipe, examination and packaging warehouse-in.
embodiment 2:
All the other are identical with described embodiment 1, and difference is, the material manufacturing steel pipe described in claim 1 is T23 steel, and its body chemical composition is:
Carbon 0.06%, manganese 0.30%, phosphorus 0.02%, sulphur 0.009%, silicon 0.4%, chromium 2.10%, molybdenum 0.1%, vanadium 0.25%, tungsten 1.65%, niobium 0.06%, aluminium 0.02%;
embodiment 3:
All the other are identical with described embodiment 1, and difference is, the material manufacturing steel pipe described in claim 1 is T23 steel, and its body chemical composition is: carbon 0.10%, manganese 0.60%, phosphorus 0.03%, sulphur 0.01%, silicon 0.5%, chromium 2.60%, molybdenum 0.3%, vanadium 0.3%, tungsten 1.75%, niobium 0.08%, aluminium 0.03%;
By above-mentioned 3 embodiments, from three groups of data in upper table, the T23 steel in embodiment 2 is at the steel pipe gone out by this manufacture technics, and high-temperature yield strength, tensile strength, ballistic work are the highest, and mechanical property is best, is now more conducive to the production of steel pipe.
What the present invention manufactured that the material of steel pipe adopts is a kind of T23 steel, and is optimized its composition and controls, and makes material have better welding property and creep rupture strength and moulding.The technique that the present invention manufactures seamless steel tube for boiler comprises the smelting of material, perforated steel billit, tube rolling and tubulation, Steel Pipe Heat process, strict regulation is had to the parameter of program each in production process, the steel pipe all technical that technique is obtained thus and performance all can meet ASMESA-213 standard-required, its antioxidant property is superior, steel pipe 550 DEG C again, 600 DEG C, 650 DEG C, 100000 h creep rupture strength extrapolated values are respectively 123,81,33MPa, all more than ASMECodecase2199-1 prescribed value scope, be suitable for promoting in each seamless steel tube for boiler manufacture.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification sheets of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (7)
1. a Hi-pressure Boiler Tube manufacturing process, is characterized in that, the material manufacturing steel pipe is T23 steel, and its specific chemical composition is as follows:
Carbon 0.04%-0.10%, manganese 0.10%-0.60%, phosphorus 0.01%-0.03%, sulphur 0.008%-0.01%, silicon 0.3%-0.5%, chromium 1.90%-2.60%, molybdenum 0.05%-0.3%, vanadium 0.2%-0.3%, tungsten 1.45%-1.75%, niobium 0.02%-0.08%, aluminium 0.01%-0.03%.
2. use material described in claim 1 to manufacture a method for Hi-pressure Boiler Tube, it is characterized in that, its processing step is as follows:
(1) smelting technology of material: raw material is after blast-melted smelting, converter smelting, smelting molten steel, and continuous casting forms round steel billet;
(2) perforated steel billit technique: after steel billet adopts ring furnace heating, enters conic perforator perforation, and the temperature during perforation of its round steel billet is 1200 DEG C-1260 DEG C;
(3) tube rolling and tube-making process: rear employing of having bored a hole is micro-draws steel rolling rolling, and during tube rolling, temperature is 1050 DEG C-1150 DEG C, then through process furnace heating after through stretch-reducing mill wroughtsteel pipe to final size, tension reducing temperature controls at 820 DEG C-900 DEG C;
(4) process for heat treatment of steel pipe: high tempering pre-treatment is carried out to tube rolling, after having processed, air cooling is to room temperature, afterwards steel pipe is heated to more than complete austenitizing temperature AC3 15 DEG C, cold-water quench after coming out of the stove, steel pipe after quenching reenters tempering stove temper, and air cooling of then coming out of the stove is to room temperature;
(5) nondestructive test of steel pipe, examination and packaging warehouse-in.
3. a kind of Hi-pressure Boiler Tube manufacturing process according to claim 2, it is characterized in that, after described step (1) Raw enters converter, carry out oxygen blast denitrogenation intensification, the smelting later stage adds ferrosilicon, ferromanganese and molybdenum-iron deoxidation alloying, control the composition of p and s, prevent molten steel peroxidation, tapping temperature controls at 1600 DEG C-1630 DEG C.
4. a kind of Hi-pressure Boiler Tube manufacturing process according to claim 2, is characterized in that, described step (1) continuous casting of molten steel becomes in steel billet process, liquid steel temperature controls at 1550 DEG C-1580 DEG C, superheating temperature Δ T=30 DEG C, pulling rate is still in 0.7m/min, and straightening temperature is 950 DEG C.
5. a kind of Hi-pressure Boiler Tube manufacturing process according to claim 2, is characterized in that, increases steel pipe aligning operation between described step (4) and (5).
6. a kind of Hi-pressure Boiler Tube manufacturing process according to claim 2, is characterized in that, high tempering pre-treatment in described step (4), and treatment temp controls at 650 DEG C, insulation 30min.
7. a kind of Hi-pressure Boiler Tube manufacturing process according to claim 2, is characterized in that, the temperature of carrying out tempering in described step (4) after quenching controls at 580 DEG C, insulation 80min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410425252.9A CN105441810A (en) | 2014-08-27 | 2014-08-27 | A manufacturing process of a high-pressure boiler steel pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410425252.9A CN105441810A (en) | 2014-08-27 | 2014-08-27 | A manufacturing process of a high-pressure boiler steel pipe |
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| CN105441810A true CN105441810A (en) | 2016-03-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419197A (en) * | 2017-04-18 | 2017-12-01 | 浙江益大特钢有限公司 | A kind of heat-resistance stainless steel seamless steel pipe and manufacture method |
| CN114773074A (en) * | 2022-05-19 | 2022-07-22 | 江苏中色复合材料有限公司 | High-temperature high-conductivity refined steel frying pan material suitable for multiple heat sources and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11166702A (en) * | 1997-12-03 | 1999-06-22 | Mitsubishi Heavy Ind Ltd | Anti-wear high tension steel for finned boiler tube |
| CN101845939A (en) * | 2009-03-25 | 2010-09-29 | 宝山钢铁股份有限公司 | Petroleum casing pipe and method for manufacturing same |
| JP2013144837A (en) * | 2012-01-16 | 2013-07-25 | Babcock Hitachi Kk | Method of post-welding heat treatment for high-strength low-alloy steel |
-
2014
- 2014-08-27 CN CN201410425252.9A patent/CN105441810A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11166702A (en) * | 1997-12-03 | 1999-06-22 | Mitsubishi Heavy Ind Ltd | Anti-wear high tension steel for finned boiler tube |
| CN101845939A (en) * | 2009-03-25 | 2010-09-29 | 宝山钢铁股份有限公司 | Petroleum casing pipe and method for manufacturing same |
| JP2013144837A (en) * | 2012-01-16 | 2013-07-25 | Babcock Hitachi Kk | Method of post-welding heat treatment for high-strength low-alloy steel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419197A (en) * | 2017-04-18 | 2017-12-01 | 浙江益大特钢有限公司 | A kind of heat-resistance stainless steel seamless steel pipe and manufacture method |
| CN114773074A (en) * | 2022-05-19 | 2022-07-22 | 江苏中色复合材料有限公司 | High-temperature high-conductivity refined steel frying pan material suitable for multiple heat sources and preparation method thereof |
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Application publication date: 20160330 |