CN107717260A - A kind of coal fired power plant stainless steel welding stick and preparation method thereof - Google Patents
A kind of coal fired power plant stainless steel welding stick and preparation method thereof Download PDFInfo
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- CN107717260A CN107717260A CN201711140865.8A CN201711140865A CN107717260A CN 107717260 A CN107717260 A CN 107717260A CN 201711140865 A CN201711140865 A CN 201711140865A CN 107717260 A CN107717260 A CN 107717260A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
A kind of coal fired power plant stainless steel welding stick and preparation method thereof, belongs to technical field of welding materials.Preparation process is forged into 70~110mm square billets first to prepare steel ingot using vacuum smelting method；Reheating rolls into 30~50mm square billets；Again Φ 8.0~Φ 12.0mm wire rods are rolled into after 1,200 1220 DEG C are incubated 40~110min；Φ 2.4mm welding wires are made in wire rod after continuous cold-drawn and intermediate heat-treatment.Welding wire welding point tensile strength >=670MPa, weld seam impact toughness value are >=70J.Advantage is that, by adding element and micro- Mg, the V such as Mo, Cu, Nb, N in stainless steel alloy, rational manufacturing process, makes processing characteristics, mechanical property of welding wire etc. be improved in addition.
Description
Technical field
The invention belongs to technical field of welding materials, more particularly to a kind of coal fired power plant stainless steel welding stick and its preparation side
Method.It is mainly used in stainless steel welded or stainless steel and the welding of other dissimilar steels in more than 600 DEG C ultra supercritical coal fired power plants
Use.
Background technology
With the development of power industry, current thermal power generation unit develops into super face via subcritical fired power generating unit
Boundary's unit.Ultra-supereritical pressure thermal power generation parameter is a new technology of effective use of energy sources, and pressure, the temperature of its steam are equal
More than the unit of conventional any parameter, so as to increase substantially generatine set heat efficiency.Supercritical unit and extra-supercritical unit are
The joint development trend of contemporary world thermal power generation, boiler are the key equipments of thermal power generation unit.
The overcritical and selection of Ultra Supercritical Boiler Steel, is considered as its indispensability that can meet to require under working condition
Can, such as ability of creep rupture strength at high temperatures, high temperature resistance fatigue, resistance to high temperature corrosion and anti-steam oxidation.Meanwhile it is also contemplated that
The correlated performance of these new type steels, particularly such as hot and cold processing characteristics, welding performance.The optimal steel of cost performance are selected,
Cost is reduced, the development to accelerating super-critical and ultra super-critical power unit, it is ensured that the safe operation of generating equipment is most important.Thermoelectricity
The critical component of boiler is primarily referred to as superheater, reheater, water-cooling wall etc., and these pressure-containing members operate in more severe operating mode
Under the conditions of, it is the significant points that design need to be paid close attention to from steel.Applied in the western countries such as the U.S., Europe boiler controller system
Super304H stainless steels, China has realized the production domesticization research of Super304H steel substantially, but the supporting welding wire country can not also
There is provided, without corresponding welding point data, especially long term high temperature duration running data.
The content of the invention
It is an object of the invention to provide a kind of coal fired power plant stainless steel welding stick and preparation method thereof, solve 600 DEG C
Above ultra supercritical coal fired power plant high-temperature component is without supporting wlding problem.Stainless steel welding stick ultra supercritical more than 600 DEG C
Higher impact flexibility, short time high temperature tensile property and 10,000 hours good persistence are shown in coal fired power plant soldering test
Can, the welding wire of preparation disclosure satisfy that the requirement of ultra supercritical coal fired power plant stainless steel wlding, its welding point tensile strength >=
670MPa, weld seam impact toughness value are ＞ 70J, 650 DEG C/159MPa high-temperature duration life >=10000h.
A kind of coal fired power plant stainless steel welding stick, is made up of the alloying element of following mass percent：C≤0.13, Si≤
0.90, Mn≤3.50, P≤0.030, S≤0.030, Cr：17.0-20.0 Ni：15.0-18.0 Mo：0.70-1.30, Cu：
2.50-3.50 Nb≤0.80, N：0.05-0.45, Mg≤0.02%, V≤0.3%, surplus is Fe and inevitable impurity member
Element.
A kind of preparation method of coal fired power plant stainless steel welding stick, specific steps and parameter are as follows：
1st, steel ingot is prepared using vacuum smelting method, be incubated at 1200-1250 DEG C after 60~120min and be forged into 70~
110mm square billets；
2nd, 30~50mm square billets are rolled into after 1200-1250 DEG C is incubated 40~110min again；
3rd, Φ 8.0~Φ 12.0mm wire rods are rolled into after 1200-1220 DEG C is incubated 40~110min again；
4th, Φ is made after continuous cold-drawn and intermediate heat-treatment (vacuum air-quenching furnace+hydrogen shield continuous annealing furnace) in wire rod
2.4mm welding wires, its tensile strength >=1050MPa.
Described stainless steel welding stick welding point tensile strength >=670MPa, weld seam impact toughness value are >=70J.
650 DEG C/159MPa high-temperature duration life ＞ the 10000h of described stainless steel welding stick.
The advantage of the invention is that：By added in stainless steel alloy the element such as Mo, Cu, Nb, N and micro- Mg,
V, rational manufacturing process, makes processing characteristics, mechanical property of welding wire etc. be improved in addition.The stainless steel welding stick of the present invention
Show excellent welding performance in soldering test, molten bath mobility and appearance of weld excellent performance in welding process, be applicable
In more than 600 DEG C ultra supercritical coal fired power plant device fabrications.
Brief description of the drawings
Fig. 1 for institute's invention welding wire weld deposit organization chart.
Embodiment
Embodiment 1
A kind of coal fired power plant stainless steel welding stick, including C, Si, Mn, P, S, Cr, Ni, Mo, Cu, Nb, N, Mg, V, surplus be
Fe and inevitable impurity element, the percentage by weight for each composition for surveying to obtain are shown in Table 1.
1st, steel ingot is prepared using vacuum smelting method, 110mm square billets is forged into after being incubated 80min at 1240 DEG C；
2nd, 40mm square billets are rolled into after 1240 DEG C are incubated 60min again；
3rd, Φ 12.0mm wire rods are rolled into after 1200 DEG C are incubated 50min again；
4th, Φ is made after continuous cold-drawn and intermediate heat-treatment (vacuum air-quenching furnace+hydrogen shield continuous annealing furnace) in wire rod
2.4mm welding wires, its tensile strength are shown in Table 2.Manually Welded Joints are tested afterwards for argon arc welding (GTAW), obtain corresponding property
3 can be shown in Table.
Embodiment 2
A kind of coal fired power plant stainless steel welding stick, including C, Si, Mn, P, S, Cr, Ni, Mo, Cu, Nb, N, Mg, V, surplus be
Fe and inevitable impurity element, the percentage by weight for each composition for surveying to obtain are shown in Table 1.
1st, steel ingot is prepared using vacuum smelting method, 100mm square billets is forged into after being incubated 90min at 1230 DEG C；
2nd, 40mm square billets are rolled into after 1230 DEG C are incubated 70min again；
3rd, Φ 10.0mm wire rods are rolled into after 1210 DEG C are incubated 60min again；
4th, Φ is made after continuous cold-drawn and intermediate heat-treatment (vacuum air-quenching furnace+hydrogen shield continuous annealing furnace) in wire rod
2.4mm welding wires, its tensile strength are shown in Table 2.Manually Welded Joints are tested afterwards for argon arc welding (GTAW), obtain corresponding property
3 can be shown in Table.
Embodiment 3
A kind of coal fired power plant stainless steel welding stick, including C, Si, Mn, P, S, Cr, Ni, Mo, Cu, Nb, N, Mg, V, surplus be
Fe and inevitable impurity element, the percentage by weight for each composition for surveying to obtain are shown in Table 1.
1st, steel ingot is prepared using vacuum smelting method, 80mm square billets is forged into after being incubated 100min at 1220 DEG C；
2nd, 40mm square billets are rolled into after 1220 DEG C are incubated 80min again；
3rd, Φ 9.0mm wire rods are rolled into after 1210 DEG C are incubated 70min again；
4th, Φ is made after continuous cold-drawn and intermediate heat-treatment (vacuum air-quenching furnace+hydrogen shield continuous annealing furnace) in wire rod
2.4mm welding wires, its tensile strength are shown in Table 2.Manually Welded Joints are tested afterwards for argon arc welding (GTAW), obtain corresponding property
3 can be shown in Table.
Embodiment 4
A kind of coal fired power plant stainless steel welding stick, including C, Si, Mn, P, S, Cr, Ni, Mo, Cu, Nb, N, Mg, V, surplus be
Fe and inevitable impurity element, the percentage by weight for each composition for surveying to obtain are shown in Table 1.
1st, steel ingot is prepared using vacuum smelting method, 90mm square billets is forged into after being incubated 110min at 1210 DEG C；
2nd, 40mm square billets are rolled into after 1220 DEG C are incubated 80min again；
3rd, Φ 8.0mm wire rods are rolled into after 1220 DEG C are incubated 80min again；
4th, Φ is made after continuous cold-drawn and intermediate heat-treatment (vacuum air-quenching furnace+hydrogen shield continuous annealing furnace) in wire rod
2.4mm welding wires, its tensile strength are shown in Table 2.Manually Welded Joints are tested afterwards for argon arc welding (GTAW), obtain corresponding property
3 can be shown in Table.
The chemical composition measured result (wt%) of the embodiment alloy of table 1
| Element | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| C | 0.077 | 0.08 | 0.091 | 0.089 |
| Si | 0.21 | 0.18 | 0.15 | 0.2 |
| Mn | 3.25 | 2.98 | 3.2 | 3.18 |
| P | <0.015 | <0.015 | <0.015 | <0.015 |
| S | 0.005 | 0.0034 | 0.0031 | 0.0028 |
| Cr | 18.5 | 18.03 | 18.12 | 18.36 |
| Ni | 16.1 | 15.49 | 16.26 | 15.85 |
| Mo | 1 | 1.17 | 0.99 | 0.93 |
| Cu | 3.3 | 2.93 | 3.33 | 3.16 |
| Nb | 0.6 | 0.57 | 0.61 | 0.62 |
| N | 0.19 | 0.17 | 0.21 | 0.22 |
| Mg | 0.003 | 0.002 | 0.005 | 0.003 |
| V | 0.05 | 0.07 | 0.09 | 0.07 |
| Fe | It is remaining | It is remaining | It is remaining | It is remaining |
The embodiment welding wire room temperature tensile properties of table 2
| Test temperature | Tensile strength, MPa | |
| Standard | Room temperature | ≥1050 |
| Embodiment 1 | Room temperature | 1123 |
| Embodiment 2 | Room temperature | 1119 |
| Embodiment 3 | Room temperature | 1090 |
| Embodiment 4 | Room temperature | 1100 |
The embodiment property of welded joint of table 3
The stainless steel welding stick of the present invention, which can be used for welding or stainless steel and the welding of other dissimilar steels between stainless steel, to be made
With.Welding point tensile strength >=670MPa that the stainless steel welding stick is formed, weld seam impact toughness value are >=70J, 650 DEG C/
159MPa high-temperature duration life ＞ 10000h.
Claims (5)
1. a kind of coal fired power plant stainless steel welding stick, it is characterised in that be made up of the alloying element of following mass percent：C≤
0.13, Si≤0.90, Mn≤3.50, P≤0.030, S≤0.030, Cr：17.0-20.0 Ni：15.0-18.0 Mo：0.70-
1.30 Cu：2.50-3.50 Nb≤0.80, N：0.05-0.45, Mg≤0.02%, V≤0.3%, surplus is for Fe and unavoidably
Impurity element.
2. the preparation method of welding wire described in a kind of claim 1, it is characterised in that specific steps and parameter are as follows：
1) steel ingot is prepared using vacuum smelting method, 70~110mm side is forged into after being incubated 60~120min at 1200-1250 DEG C
Base；
2) 30~50mm square billets are rolled into after 1200-1250 DEG C is incubated 40~110min again；
3) Φ 8.0~Φ 12.0mm wire rods are rolled into after 1200-1220 DEG C is incubated 40~110min again；
4) Φ 2.4mm welding wires are made in wire rod after continuous cold-drawn and intermediate heat-treatment, its tensile strength >=1050MPa.
3. according to the method for claim 2, it is characterised in that the intermediate heat-treatment described in step 4) includes vacuum air-quenching
Stove and hydrogen shield continuous annealing furnace.
4. according to the method for claim 2, it is characterised in that prepared welding wire welding point tensile strength >=
670MPa, weld seam impact toughness value are >=70J.
5. according to the method for claim 2, it is characterised in that the 650 DEG C/159MPa high-temperature and durable longevity of prepared welding wire
Order ＞ 10000h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711140865.8A CN107717260A (en) | 2017-11-16 | 2017-11-16 | A kind of coal fired power plant stainless steel welding stick and preparation method thereof |
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|---|---|---|---|
| CN201711140865.8A CN107717260A (en) | 2017-11-16 | 2017-11-16 | A kind of coal fired power plant stainless steel welding stick and preparation method thereof |
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| CN107717260A true CN107717260A (en) | 2018-02-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108330394A (en) * | 2018-03-23 | 2018-07-27 | 长沙天卓塑胶有限公司 | A kind of welding point and the welding method using the welding point |
| CN110549031A (en) * | 2018-05-31 | 2019-12-10 | 上海电气电站设备有限公司 | High-heat-strength welding wire for dissimilar steel welding joint |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108330394A (en) * | 2018-03-23 | 2018-07-27 | 长沙天卓塑胶有限公司 | A kind of welding point and the welding method using the welding point |
| CN110549031A (en) * | 2018-05-31 | 2019-12-10 | 上海电气电站设备有限公司 | High-heat-strength welding wire for dissimilar steel welding joint |
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Application publication date: 20180223 |