CN106521242A - No-welding small R medium-frequency elbow alloy material for boiler and preparation method thereof - Google Patents
No-welding small R medium-frequency elbow alloy material for boiler and preparation method thereof Download PDFInfo
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- CN106521242A CN106521242A CN201610846605.1A CN201610846605A CN106521242A CN 106521242 A CN106521242 A CN 106521242A CN 201610846605 A CN201610846605 A CN 201610846605A CN 106521242 A CN106521242 A CN 106521242A
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- elbow
- boiler
- exempting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L43/00—Bends; Siphons
- F16L43/001—Bends; Siphons made of metal
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- Engineering & Computer Science (AREA)
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- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Arc Welding In General (AREA)
Abstract
The invention belongs to the technical field of boiler equipment materials, and in particular, relates to a no-welding small R medium-frequency elbow alloy material for a boiler and a preparation method thereof. The material comprises the following components in parts by weight: 0.2-0.4% of Si, 0.07-0.12% of C, 0.3-0.6% of Mn, 10.5-12.5% of Cr, 0.3-0.6% of Mo, 1.5-2% of W, 0.04-0.06% of Nb, 0.001-0.006% of B, 0.05-0.08% of Al, 0.4-0.7% of Fe, 0.8-1.5% of Ti, 0.006-0.02% of Mg, 0.15-0.2% of Mn, 0.01-0.05% of Zr, 0.05-0.1% of rare earth metal, 0.005-0.02% of P, 0.005-0.01% of S, and the balance of Ni. The no-welding small R medium-frequency elbow alloy material for the boiler has such advantages as difficult generation of cracks in the bent pipe machining and heat treatment period, small bent pipe radius, high hardness, high strength and high heat conductivity.
Description
Technical field
The invention belongs to boiler plant field of material technology, and in particular to a kind of boiler is closed with exempting to weld little R intermediate frequencies elbow
Golden material and preparation method thereof.
Background technology
Boiler is important heat energy supply equipment in national economy, is widely used in electric power, machinery, metallurgy, chemical industry, spinning
Knit, papermaking, the industry such as food, and the field such as industry and civil heating.In boiler plant field, for many years, people are continuous
Develop the alloy material of the corrosion-resistant requirement met under high temperature, high intensity and severe environmental conditions, to improve efficiency, reduction
Operating cost simultaneously increases the service life, and properties are improving constantly progress.
Existing boiler is run generally under high steam pressure and vapor (steam) temperature, in order to the special type for meeting boiler material will
Ask, the operation under high temperature, high-vapor-pressure causes boiler corrosion more serious, to alloy materials such as the intermediate frequency elbows in boiler plant
Proposition is further required, for as intermediate frequency elbow alloy material, the wall thickness of pipe must reach 60-80mm and can just use, and be
Meet intensity and the temperature requirement of boiler intermediate frequency elbow alloy material, and it is enough intensity, temperature capability and stability, resistance to
Steam corrosion, and enough resistance to steam oxidations are realized, therefore, need innovation research and development one kind badly and there is phase stability, can process
The high-temperature of property, high intensity, the boiler of high thermal conductivity intermediate frequency Elbow material.
The content of the invention
Goal of the invention：The invention aims to overcome deficiency of the prior art, there is provided a kind of high-temperature, high intensity
Alloy material, improve in long-term high-temperature high-pressure work environment occur it is oxidizable, cracking a kind of boiler with exempt from weld
Little R intermediate frequencies elbow alloy material and preparation method thereof.
Technical scheme：In order to solve above-mentioned technical problem, a kind of boiler of the present invention is with exempting to weld little R intermediate frequencies elbow
Alloy material, its each group distribution ratio in terms of parts by weight is, Si：0.2%～0.4%, C：0.07%～0.12%, Mn：
0.3%～0.6%, Cr：10.5%～12.5%, Mo：0.3%～0.6%, W：1.5%～2%, Nb：0.04%～
0.06%, B：0.001%～0.006%, Al：0.05%～0.08%, Fe：0.4%～0.7%, Ti：0.8%～1.5%,
Mg：0.006%～0.02%, Mn：0.15%～0.2%, Zr：0.01%～0.05%, rare earth metal：0.05%～0.1%,
P：0.005%～0.02%, S：0.005%～0.01%, remaining is Ni.
Its each component optimum ratio in terms of parts by weight is, Si：0.25%～0.35%, C：0.08%～0.11%,
Mn：0.4%～0.5%, Cr：11%～12%, Mo：0.4%～0.5%, W：1.6%～1.9%, Nb：0.045%～
0.055%, B：0.002%～0.005%, Al：0.06%～0.07%, Fe：0.45%～0.65%, Ti：0.9%～
1.4%, Mg：0.008%～0.018%, Mn：0.16%～0.19%, Zr：0.012%～0.04%, rare earth metal：
0.06%～0.08%, P：0.007%～0.018%, S：0.006%～0.008%, remaining is Ni.
Its further preferred proportioning of each component in terms of parts by weight is, Si：0.3%, C：0.1%, Mn：0.45%, Cr：
11.5%, Mo：0.45%, W：1.8%, Nb：0.05%, B：0.004%, Al：0.065%, Fe：0.55%, Ti：1.2%,
Mg：0.012%, Mn：0.18%, Zr：0.02%, rare earth metal：0.07%, P：0.012%, S：0.007%, remaining is Ni.
Silicon (Si) is necessary element in alloys range of the present invention, because which can be formed below enhanced in chromium oxide film
Silica (SiO2) layer is further improving corrosion resistance.
Manganese (Mn) is effective desulfurizing agent during melting, because which can reduce the integrality of diaphragm, it is therefore necessary to protect
The control of element is held below 0.2%.
Chromium (Cr) is the indispensable element in alloys range of the present invention, because which ensure that the formation of diaphragm, is met musted
The high temperature steam oxidisability for needing.
Tungsten (W) forms primary carbide, can work similar to the primary carbide of Nb and Ti.
Niobium (Nb) is required intensified element and grain size control element.Niobium together with titanium can react to be formed with carbon
Primary carbide during hot-working as grain size stabilizer.
Boron (B) can be effectively facilitated high-temperature intensity and stress fracture ductility.
Aluminium (Al) is the indispensable element in alloys range of the present invention because which not only facilitates deoxidation, and with Ni together with
Ti and Nb is reacted to form high-temperature phase, significantly increases ductility, stability, toughness and machinability.
Iron (Fe) reduces the integrality of chromium oxide by forming spinelle FeCr2O4, improves resistance to steam oxidation.
Magnesium (Mg) is the accelerator of effective desulfurizing agent of alloy and film adhesion.
Zirconium (Zr) can effectively improve high-temperature intensity and stress ductility.
Carbon (C) controls grain size together with combining with Ti and Nb, contributes to strengthening crystal boundary to strengthen stress rupture properties.
Nickel (Ni) be ensure phase stability, sufficient high-temperature intensity, ductility, toughness and good machinability and
Weldability.
With exempting to weld the preparation method of little R intermediate frequencies elbow, it comprises the following steps a kind of boiler,
(1) melting：It is added in melting furnace after each component raw material for preparing is mixed, heat temperature raising is melted, and is treated
After raw material is completely melt, melting furnace internal temperature is adjusted to 1150 DEG C～1200 DEG C carries out micronization processes 10h, then by melting furnace
Internal temperature is adjusted to 1100 DEG C～1150 DEG C, carries out refining treatment 2h；
(2) tube rolling：Keep melting furnace internal temperature at 1050 DEG C～1150 DEG C, material in melting furnace is extruded, wall is obtained
The tubing that thickness is 0.8cm～1.5cm, external diameter is 10cm～26cm, and it is cooled to normal temperature；
(3) it is heat-treated：The tubing of extrusion is heated to 950 DEG C～1050 DEG C to be annealed, 1～2 hour is incubated, subsequent water
Quench, and after aging 8h at 750 DEG C, naturally cool to normal temperature；
(4) shape：Tubing after heat treatment is carried out into bend pipe process by intermediate frequency hydraulic pipe bender, and through NORMAL BEND
Platform alignment, that is, obtain a kind of boiler with exempting to weld little R intermediate frequencies elbow finished product.
Beneficial effect：Compared with prior art, its remarkable advantage is the present invention：In the present invention, process and heat in bend pipe
Material during process is not likely to produce crackle, and can not by welding, to obtain elbow radius little, and there is high rigidity, high-strength
The boiler intermediate frequency elbow alloy material of degree and high heat conductance performance.
Specific embodiment
The invention will be further elaborated by the following examples.
Embodiment 1：
A kind of boiler of the present invention is with exempting to weld little R intermediate frequencies elbow alloy material, its each group in terms of parts by weight
Distribution ratio is：Si：0.3%, C：0.1%, Mn：0.45%, Cr：11.5%, Mo：0.45%, W：1.8%, Nb：0.05%, B：
0.004%, Al：0.065%, Fe：0.55%, Ti：1.2%, Mg：0.012%, Mn：0.18%, Zr：0.02%, rare earth gold
Category：0.07%, P：0.012%, S：0.007%, remaining is Ni.
With exempting to weld little R intermediate frequencies elbow preparation method, it comprises the following steps a kind of boiler,
(1) melting：It is added in melting furnace after each component raw material for preparing is mixed, heat temperature raising is melted, and is treated
After raw material is completely melt, melting furnace internal temperature is adjusted to 1180 DEG C carries out micronization processes 10h, then by melting furnace internal temperature
Adjust to 1130 DEG C, carry out refining treatment 2h；
(2) tube rolling：Keep melting furnace internal temperature at 1100 DEG C, material in melting furnace is extruded, obtaining wall thickness is
The tubing of 0.8cm, external diameter for 10cm, and it is cooled to normal temperature；
(3) it is heat-treated：The tubing of extrusion is heated to 1020 DEG C to be annealed, 1.5h, subsequent water quenching is incubated；At 750 DEG C
Under aging 8h naturally cool to normal temperature；
(4) shape：Tubing after heat treatment is carried out into bend pipe process by intermediate frequency hydraulic pipe bender, and through NORMAL BEND
Platform alignment, that is, obtain a kind of boiler with exempting to weld little R intermediate frequencies elbow finished product.
Embodiment 2：
A kind of boiler of the present invention is with exempting to weld little R intermediate frequencies elbow alloy material, its each group in terms of parts by weight
Distribution ratio is：Si：0.25%, C：0.08%, Mn：0.4%, Cr：12%, Mo：0.4%, W：1.6%, Nb：0.045%, B：
0.003%, Al：0.06%, Fe：0.45%, Ti：1%, Mg：0.01%, Mn：0.16%, Zr：0.016%, rare earth metal：
0.06%, P：0.01%, S：0.006%, remaining is Ni.
With exempting to weld little R intermediate frequencies elbow preparation method, it comprises the following steps a kind of boiler,
(1) melting：It is added in melting furnace after each component raw material for preparing is mixed, heat temperature raising is melted, and is treated
After raw material is completely melt, melting furnace internal temperature is adjusted to 1160 DEG C carries out micronization processes 10h, then by melting furnace internal temperature
Adjust to 1120 DEG C, carry out refining treatment 2h；
(2) tube rolling：Keep melting furnace internal temperature at 1080 DEG C, material in melting furnace extrude, obtain wall thickness be 1cm,
Tubing of the external diameter for 12cm, and it is cooled to normal temperature；
(3) it is heat-treated：The tubing of extrusion is heated to 1000 DEG C to be annealed, 1.6h, subsequent water quenching is incubated；At 750 DEG C
Shi Laohua 8h simultaneously naturally cool to normal temperature；
(4) shape：Tubing after heat treatment is carried out into bend pipe process by intermediate frequency hydraulic pipe bender, and through NORMAL BEND
Platform alignment, that is, obtain a kind of boiler with exempting to weld little R intermediate frequencies elbow finished product.
Embodiment 3：
A kind of boiler of the present invention is with exempting to weld little R intermediate frequencies elbow alloy material, its each group in terms of parts by weight
Distribution ratio is：Si：0.35%, C：0.11%, Mn：0.5%, Cr：11%, Mo：0.5%, W：1.8%, Nb：0.055%, B：
0.004%, Al：0.07%, Fe：0.6%, Ti：1.2%, Mg：0.015%, Mn：0.18%, Zr：0.025%, rare earth metal：
0.08%, P：0.016%, S：0.008%, remaining is Ni.
With exempting to weld little R intermediate frequencies elbow preparation method, it comprises the following steps a kind of boiler,
(1) melting：It is added in melting furnace after each component raw material for preparing is mixed, heat temperature raising is melted, and is treated
After raw material is completely melt, melting furnace internal temperature is adjusted to 1170 DEG C carries out micronization processes 10h, then by melting furnace internal temperature
Adjust to 1140 DEG C, carry out refining treatment 2h；
(2) tube rolling：Keep melting furnace internal temperature at 1130 DEG C, material in melting furnace is extruded, obtaining wall thickness is
The tubing of 1.2cm, external diameter for 16cm, and it is cooled to normal temperature；
(3) it is heat-treated：The tubing of extrusion is heated to 1010 DEG C to be annealed, 2h, subsequent water quenching is incubated；At 750 DEG C
Aging 8h simultaneously naturally cools to normal temperature；
(4) shape：Tubing after heat treatment is carried out into bend pipe process by intermediate frequency hydraulic pipe bender, and through NORMAL BEND
Platform alignment, that is, obtain a kind of boiler with exempting to weld little R intermediate frequencies elbow finished product.
With exempting to weld little R intermediate frequencies Elbow material, its Main Mechanical data see the table below a kind of boiler of the present invention：
The invention provides a kind of thinking and method, implement the method and approach of the technical scheme a lot, above institute
States only be the preferred embodiment of the present invention, it is noted that for those skilled in the art, without departing from
On the premise of the principle of the invention, some improvements and modifications can also be made, these improvements and modifications also should be regarded as the guarantor of the present invention
Shield scope, in the present embodiment, clearly each part not can use prior art to be realized.
Claims (4)
1. a kind of boiler is with exempting to weld little R intermediate frequencies elbow alloy material, it is characterised in that：Its each component in terms of parts by weight is matched somebody with somebody
Than for Si：0.2%～0.4%, C：0.07%～0.12%, Mn：0.3%～0.6%, Cr：10.5%～12.5%, Mo：
0.3%～0.6%, W：1.5%～2%, Nb：0.04%～0.06%, B：0.001%～0.006%, Al：0.05%～
0.08%, Fe：0.4%～0.7%, Ti：0.8%～1.5%, Mg：0.006%～0.02%, Mn：0.15%～0.2%,
Zr：0.01%～0.05%, rare earth metal：0.05%～0.1%, P：0.005%～0.02%, S：0.005%～0.01%,
Remaining is Ni.
2. a kind of boiler according to claim 1 is with exempting to weld little R intermediate frequencies elbow alloy material, it is characterised in that：It with
The each component optimum ratio of parts by weight meter is, Si：0.25%～0.35%, C：0.08%～0.11%, Mn：0.4%～
0.5%, Cr：11%～12%, Mo：0.4%～0.5%, W：1.6%～1.9%, Nb：0.045%～0.055%, B：
0.002%～0.005%, Al：0.06%～0.07%, Fe：0.45%～0.65%, Ti：0.9%～1.4%, Mg：
0.008%～0.018%, Mn：0.16%～0.19%, Zr：0.012%～0.04%, rare earth metal：0.06%～
0.08%, P：0.007%～0.018%, S：0.006%～0.008%, remaining is Ni.
3. a kind of boiler according to claim 1 is with exempting to weld little R intermediate frequencies elbow alloy material, it is characterised in that：It with
The further preferred proportioning of each component of parts by weight meter is, Si：0.3%, C：0.1%, Mn：0.45%, Cr：11.5%, Mo：
0.45%, W：1.8%, Nb：0.05%, B：0.004%, Al：0.065%, Fe：0.55%, Ti：1.2%, Mg：0.012%,
Mn：0.18%, Zr：0.02%, rare earth metal：0.07%, P：0.012%, S：0.007%, remaining is Ni.
4. with exempting to weld little R intermediate frequencies elbow preparation method, its feature exists a kind of boiler according to claim 1 or 2 or 3
In：It comprises the following steps,
(1) melting：It is added in melting furnace after each component raw material for preparing is mixed, heat temperature raising is melted, and treats raw material
After being completely melt, melting furnace internal temperature is adjusted to 1150 DEG C～1200 DEG C carries out micronization processes 10h, then by inside melting furnace
Temperature is adjusted to 1100 DEG C～1150 DEG C, carries out refining treatment 2h；
(2) tube rolling：Keep melting furnace internal temperature at 1050 DEG C～1150 DEG C, material in melting furnace is extruded, obtaining wall thickness is
The tubing of 0.8cm～1.5cm, external diameter for 10cm～26cm, and it is cooled to normal temperature；
(3) it is heat-treated：The tubing of extrusion is heated to 950 DEG C～1050 DEG C to be annealed, 1～2 hour is incubated, subsequent water quenching,
And after aging 8h at 750 DEG C, naturally cool to normal temperature；
(4) shape：Tubing after heat treatment is carried out into bend pipe process by intermediate frequency hydraulic pipe bender, and through NORMAL BEND platform
Calibration, that is, obtain a kind of boiler with exempting to weld little R intermediate frequencies elbow finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610846605.1A CN106521242A (en) | 2016-09-23 | 2016-09-23 | No-welding small R medium-frequency elbow alloy material for boiler and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610846605.1A CN106521242A (en) | 2016-09-23 | 2016-09-23 | No-welding small R medium-frequency elbow alloy material for boiler and preparation method thereof |
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| Publication Number | Publication Date |
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| CN106521242A true CN106521242A (en) | 2017-03-22 |
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| CN201610846605.1A Pending CN106521242A (en) | 2016-09-23 | 2016-09-23 | No-welding small R medium-frequency elbow alloy material for boiler and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102084014A (en) * | 2008-04-10 | 2011-06-01 | 亨廷顿冶金公司 | Ultra supercritical boiler header alloy and method of preparation |
| CN102308015A (en) * | 2009-02-16 | 2012-01-04 | 住友金属工业株式会社 | Method for manufacturing metal pipe |
| CN104946932A (en) * | 2014-03-25 | 2015-09-30 | 新日铁住金株式会社 | Method for manufacturing austenite series heat-resistant alloy pipe and austenite series heat-resistant alloy pipe manufactured by the method |
-
2016
- 2016-09-23 CN CN201610846605.1A patent/CN106521242A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102084014A (en) * | 2008-04-10 | 2011-06-01 | 亨廷顿冶金公司 | Ultra supercritical boiler header alloy and method of preparation |
| CN102308015A (en) * | 2009-02-16 | 2012-01-04 | 住友金属工业株式会社 | Method for manufacturing metal pipe |
| CN104946932A (en) * | 2014-03-25 | 2015-09-30 | 新日铁住金株式会社 | Method for manufacturing austenite series heat-resistant alloy pipe and austenite series heat-resistant alloy pipe manufactured by the method |
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