CN104633357A - Dual-layer alloy elbow and production method thereof - Google Patents
Dual-layer alloy elbow and production method thereof Download PDFInfo
- Publication number
- CN104633357A CN104633357A CN201510060205.3A CN201510060205A CN104633357A CN 104633357 A CN104633357 A CN 104633357A CN 201510060205 A CN201510060205 A CN 201510060205A CN 104633357 A CN104633357 A CN 104633357A
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- Prior art keywords
- double
- layer alloy
- pipe
- layer
- alloy
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Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a dual-layer alloy elbow and a production method thereof. The dual-layer alloy elbow comprises an outer layer alloy pipe and an inner layer alloy pipe. The outer layer alloy pipe is arranged outside the inner layer alloy pipe and is made of stainless steel. The inner layer alloy pipe is made of carbon steel. The thickness of the outer layer alloy pipe is smaller than that of the inner layer alloy pipe. The production method specifically includes the steps of preparing alloy blanks, boring holes, conducting heating after boring the holes, broaching the holes, conducting heating after broaching the holes, extruding and producing a dual-layer alloy composite pierced billet, conducting thermal softening and machining the dual-layer alloy elbow. According to the dual-layer alloy elbow, the outer layer alloy pipe has excellent corrosion resistance and high temperature resistance, the inner layer alloy pipe has high strength and good heat conduction performance, the outer layer alloy pipe and the inner layer alloy pipe are firmly combined, the cooling capacity is greatly improved, the efficiency of a boiler is improved, and the running safety of the boiler is ensured.
Description
Technical field
The present invention relates to a kind of elbow, specifically a kind of double-layer alloy elbow and production method thereof.
Background technique
High-pressure boiler tube is often in high temperature and high pressure condition when using, and boiler tube, under the effect of high-temperature flue gas and water vapour, oxidation and corrosion can occur.Require that steel pipe has high creep rupture strength and high antioxidant anticorrosive performance, and there is good structure stability.High-pressure boiler tube is mainly used to the superheater tube, reheater tube, air pipe, main steam pipe etc. that manufacture high-pressure autoclave and superpressure boiler.For tackling high antioxidant anticorrosive environment, the material of use is the stainless steel that Cr, Ni content is high, such as 07Cr19Ni10,07Cr19Ni11Ti, 07Cr18Ni11Nb, 07Cr25Ni21NbN, 10Cr18Ni9NbCu3BN and 08Cr18Ni11NbFG.But traditional single stainless steel alloy material thermal conductivity is poor, and the heat of pipe and elbow can not transmit fast, seriously reduces cooling capacity, causes the efficiency of boiler to be had a greatly reduced quality.
Summary of the invention
The object of the present invention is to provide a kind of intensity is high, cooling performance is good double-layer alloy elbow and production method thereof, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the invention provides following technological scheme:
A kind of double-layer alloy elbow, comprise outer layer alloys pipe and inner alloy pipe, outer layer alloys pipe is arranged on the outside of inner alloy pipe, and the material of described outer layer alloys pipe is stainless steel, the material of inner alloy pipe is carbon steel, and the thickness of outer layer alloys pipe is less than the thickness of inner alloy pipe.
As the further scheme of the present invention: the material of described outer layer alloys pipe is 07Cr19Ni10,07Cr19Ni11Ti, 07Cr18Ni11Nb, 07Cr25Ni21NbN, 10Cr18Ni9NbCu3BN or 08Cr18Ni11NbFG.
As the further scheme of the present invention: the material of described inner alloy pipe is 20G, 20MnG, 25MnG, 12Cr1MoVG, 15MoG or 20MoG.
The production method of described double-layer alloy elbow, concrete steps are as follows:
1) double-layer alloy blank is prepared;
2) bore hole is carried out to double-layer alloy blank;
3) the double-layer alloy blank after bore hole is uniformly heated to 1020-1250 DEG C;
4) use ring rolling machine that the double-layer alloy blank after heating is carried out reaming in reaming cylinder;
5) the double-layer alloy blank after reaming is uniformly heated to 1050-1230 DEG C;
6) adopt extrusion press to be extruded by the double-layer alloy blank after homogeneous heating, produce double-layer alloy compound hollow forging;
7) double-layer alloy compound hollow forging is carried out softening heat treatment;
8) use bending machine that softening heat treated double-layer alloy compound hollow forging is processed double-layer alloy elbow.
As the further scheme of the present invention: when described step 1) prepares double-layer alloy blank, first pipe is worked into the tapering of 1:200, the surface roughness of pipe is 3-3.4 μm, internal and external layer pipe adopts interference fit, assembling magnitude of interference is 0.05-0.1mm, utilizes press machine to be pressed in outer pipe by internal layer pipe, prepares double-layer alloy blank, double-layer alloy blank is vacuumized, then by the two ends soldering and sealing of double-layer alloy blank.
As the present invention's further scheme: the diameter of described bore hole is 35-120mm.
Compared with prior art, the invention has the beneficial effects as follows:
The double-layer alloy elbow that the present invention produces, outer layer alloys pipe has excellent corrosion-resistant and resistant to elevated temperatures performance, inner alloy pipe has high intensity and good heat-conducting property, outer layer alloys pipe and inner alloy duct ligation close firmly simultaneously, substantially increase cooling capacity, improve the efficiency of boiler, ensure that the Security of boiler operatiopn.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1-outer layer alloys pipe; 2-inner alloy pipe.
Embodiment
Be described in more detail below in conjunction with the technological scheme of embodiment to this patent.
Embodiment 1
Refer to Fig. 1, in the embodiment of the present invention, a kind of double-layer alloy elbow, comprise outer layer alloys pipe 1 and inner alloy pipe 2, outer layer alloys pipe 1 is arranged on the outside of inner alloy pipe 2, the thickness of described outer layer alloys pipe 1 is less than the thickness of inner alloy pipe 2, and the material of outer layer alloys pipe 1 is 07Cr19Ni10, and the material of described inner alloy pipe 2 is 20G.
The production method of described double-layer alloy elbow, concrete steps are as follows:
1) double-layer alloy blank is prepared, first pipe is worked into the tapering of 1:200, the surface roughness of pipe is 3 μm, internal and external layer pipe adopts interference fit, assembling magnitude of interference is 0.05mm, utilizes press machine to be pressed in outer pipe by internal layer pipe, prepares double-layer alloy blank, double-layer alloy blank is vacuumized, then by the two ends soldering and sealing of double-layer alloy blank;
2) carry out bore hole to double-layer alloy blank, the diameter of bore hole is 35mm;
3) the double-layer alloy blank after bore hole is uniformly heated to 1020 DEG C;
4) use ring rolling machine that the double-layer alloy blank after heating is carried out reaming in reaming cylinder;
5) the double-layer alloy blank after reaming is uniformly heated to 1050 DEG C;
6) adopt extrusion press to be extruded by the double-layer alloy blank after homogeneous heating, produce double-layer alloy compound hollow forging;
7) double-layer alloy compound hollow forging is carried out softening heat treatment;
8) use bending machine that softening heat treated double-layer alloy compound hollow forging is processed double-layer alloy elbow.
Embodiment 2
Refer to Fig. 1, in the embodiment of the present invention, a kind of double-layer alloy elbow, comprise outer layer alloys pipe 1 and inner alloy pipe 2, outer layer alloys pipe 1 is arranged on the outside of inner alloy pipe 2, the thickness of described outer layer alloys pipe 1 is less than the thickness of inner alloy pipe 2, and the material of outer layer alloys pipe 1 is 07Cr19Ni11Ti, and the material of described inner alloy pipe 2 is 20MnG.
The production method of described double-layer alloy elbow, concrete steps are as follows:
1) double-layer alloy blank is prepared, first pipe is worked into the tapering of 1:200, the surface roughness of pipe is 3.2 μm, internal and external layer pipe adopts interference fit, assembling magnitude of interference is 0.07mm, utilizes press machine to be pressed in outer pipe by internal layer pipe, prepares double-layer alloy blank, double-layer alloy blank is vacuumized, then by the two ends soldering and sealing of double-layer alloy blank;
2) carry out bore hole to double-layer alloy blank, the diameter of bore hole is 70mm;
3) the double-layer alloy blank after bore hole is uniformly heated to 1100 DEG C;
4) use ring rolling machine that the double-layer alloy blank after heating is carried out reaming in reaming cylinder;
5) the double-layer alloy blank after reaming is uniformly heated to 1150 DEG C;
6) adopt extrusion press to be extruded by the double-layer alloy blank after homogeneous heating, produce double-layer alloy compound hollow forging;
7) double-layer alloy compound hollow forging is carried out softening heat treatment;
8) use bending machine that softening heat treated double-layer alloy compound hollow forging is processed double-layer alloy elbow.
Embodiment 3
Refer to Fig. 1, in the embodiment of the present invention, a kind of double-layer alloy elbow, comprise outer layer alloys pipe 1 and inner alloy pipe 2, outer layer alloys pipe 1 is arranged on the outside of inner alloy pipe 2, the thickness of described outer layer alloys pipe 1 is less than the thickness of inner alloy pipe 2, and the material of outer layer alloys pipe 1 is 07Cr18Ni11Nb, and the material of described inner alloy pipe 2 is 25MnG.
The production method of described double-layer alloy elbow, concrete steps are as follows:
1) double-layer alloy blank is prepared, first pipe is worked into the tapering of 1:200, the surface roughness of pipe is 3.4 μm, internal and external layer pipe adopts interference fit, assembling magnitude of interference is 0.09mm, utilizes press machine to be pressed in outer pipe by internal layer pipe, prepares double-layer alloy blank, double-layer alloy blank is vacuumized, then by the two ends soldering and sealing of double-layer alloy blank;
2) carry out bore hole to double-layer alloy blank, the diameter of bore hole is 100mm;
3) the double-layer alloy blank after bore hole is uniformly heated to 1250 DEG C;
4) use ring rolling machine that the double-layer alloy blank after heating is carried out reaming in reaming cylinder;
5) the double-layer alloy blank after reaming is uniformly heated to 1230 DEG C;
6) adopt extrusion press to be extruded by the double-layer alloy blank after homogeneous heating, produce double-layer alloy compound hollow forging;
7) double-layer alloy compound hollow forging is carried out softening heat treatment;
8) use bending machine that softening heat treated double-layer alloy compound hollow forging is processed double-layer alloy elbow.
The double-layer alloy elbow that the present invention produces, outer layer alloys pipe 1 has excellent corrosion-resistant and resistant to elevated temperatures performance, inner alloy pipe 2 has high intensity and good heat-conducting property, outer layer alloys pipe 1 and inner alloy pipe 2 combine firmly simultaneously, substantially increase cooling capacity, improve the efficiency of boiler, ensure that the Security of boiler operatiopn.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned mode of execution, in the ken that one skilled in the relevant art possesses, various change can also be made under the prerequisite not departing from this patent aim.
Claims (6)
1. a double-layer alloy elbow, it is characterized in that, comprise outer layer alloys pipe (1) and inner alloy pipe (2), outer layer alloys pipe (1) is arranged on the outside of inner alloy pipe (2), the material of described outer layer alloys pipe (1) is stainless steel, the material of inner alloy pipe (2) is carbon steel, and the thickness of outer layer alloys pipe (1) is less than the thickness of inner alloy pipe (2).
2. double-layer alloy elbow according to claim 1, it is characterized in that, the material of described outer layer alloys pipe (1) is 07Cr19Ni10,07Cr19Ni11Ti, 07Cr18Ni11Nb, 07Cr25Ni21NbN, 10Cr18Ni9NbCu3BN or 08Cr18Ni11NbFG.
3. double-layer alloy elbow according to claim 1, is characterized in that, the material of described inner alloy pipe (2) is 20G, 20MnG, 25MnG, 12Cr1MoVG, 15MoG or 20MoG.
4. a production method for the double-layer alloy elbow as described in as arbitrary in claim 1-3, it is characterized in that, concrete steps are as follows:
1) double-layer alloy blank is prepared;
2) bore hole is carried out to double-layer alloy blank;
3) the double-layer alloy blank after bore hole is uniformly heated to 1020-1250 DEG C;
4) use ring rolling machine that the double-layer alloy blank after heating is carried out reaming in reaming cylinder;
5) the double-layer alloy blank after reaming is uniformly heated to 1050-1230 DEG C;
6) adopt extrusion press to be extruded by the double-layer alloy blank after homogeneous heating, produce double-layer alloy compound hollow forging;
7) double-layer alloy compound hollow forging is carried out softening heat treatment;
8) use bending machine that softening heat treated double-layer alloy compound hollow forging is processed double-layer alloy elbow.
5. the production method of double-layer alloy elbow according to claim 4, it is characterized in that, when described step 1) prepares double-layer alloy blank, first pipe is worked into the tapering of 1:200, the surface roughness of pipe is 3-3.4 μm, internal and external layer pipe adopts interference fit, assembling magnitude of interference is 0.05-0.1mm, utilizes press machine to be pressed in outer pipe by internal layer pipe, prepares double-layer alloy blank, double-layer alloy blank is vacuumized, then by the two ends soldering and sealing of double-layer alloy blank.
6. the production method of double-layer alloy elbow according to claim 4, is characterized in that, the diameter of described bore hole is 35-120mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510060205.3A CN104633357A (en) | 2015-02-05 | 2015-02-05 | Dual-layer alloy elbow and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510060205.3A CN104633357A (en) | 2015-02-05 | 2015-02-05 | Dual-layer alloy elbow and production method thereof |
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| CN104633357A true CN104633357A (en) | 2015-05-20 |
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| CN201510060205.3A Pending CN104633357A (en) | 2015-02-05 | 2015-02-05 | Dual-layer alloy elbow and production method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106048375A (en) * | 2016-08-15 | 2016-10-26 | 苏州润利电器有限公司 | Double-layer composite high-performance casting alloy for electric fittings |
| CN108825912A (en) * | 2018-09-03 | 2018-11-16 | 宝鸡市创信金属材料有限公司 | A kind of pure titanium pressure duct steering head of integration |
| CN111306391A (en) * | 2019-09-11 | 2020-06-19 | 共青城瑞钛管道科技有限公司 | Externally-coated steel-plastic composite wear-resistant elbow and manufacturing process thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2264661A1 (en) * | 1974-03-20 | 1975-10-17 | Centro Speriment Metallurg | Corrosion-resistant clad steel prodn - by applying a stainless steel cladding and a heat treatment |
| JPH05148510A (en) * | 1991-04-22 | 1993-06-15 | Hitachi Metals Ltd | Wear resistant composite roll and manufacture thereof |
| CN1290579A (en) * | 2000-11-07 | 2001-04-11 | 杨宝森 | Method for producing multiple metal composite pipe |
| CN102672438A (en) * | 2012-06-04 | 2012-09-19 | 新兴铸管股份有限公司 | Process for producing metallurgical composite double metal seamless steel pipe |
| CN204477571U (en) * | 2015-01-06 | 2015-07-15 | 河北工程大学 | A kind of metallurgy combination double-layer alloy elbow |
-
2015
- 2015-02-05 CN CN201510060205.3A patent/CN104633357A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2264661A1 (en) * | 1974-03-20 | 1975-10-17 | Centro Speriment Metallurg | Corrosion-resistant clad steel prodn - by applying a stainless steel cladding and a heat treatment |
| JPH05148510A (en) * | 1991-04-22 | 1993-06-15 | Hitachi Metals Ltd | Wear resistant composite roll and manufacture thereof |
| CN1290579A (en) * | 2000-11-07 | 2001-04-11 | 杨宝森 | Method for producing multiple metal composite pipe |
| CN102672438A (en) * | 2012-06-04 | 2012-09-19 | 新兴铸管股份有限公司 | Process for producing metallurgical composite double metal seamless steel pipe |
| CN204477571U (en) * | 2015-01-06 | 2015-07-15 | 河北工程大学 | A kind of metallurgy combination double-layer alloy elbow |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106048375A (en) * | 2016-08-15 | 2016-10-26 | 苏州润利电器有限公司 | Double-layer composite high-performance casting alloy for electric fittings |
| CN108825912A (en) * | 2018-09-03 | 2018-11-16 | 宝鸡市创信金属材料有限公司 | A kind of pure titanium pressure duct steering head of integration |
| CN108825912B (en) * | 2018-09-03 | 2024-01-30 | 宝鸡市创信金属材料有限公司 | Integrated pure titanium high-pressure pipeline steering head |
| CN111306391A (en) * | 2019-09-11 | 2020-06-19 | 共青城瑞钛管道科技有限公司 | Externally-coated steel-plastic composite wear-resistant elbow and manufacturing process thereof |
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Application publication date: 20150520 |