CN112872576A - Method for recycling excess metal materials in pipe shape - Google Patents
Method for recycling excess metal materials in pipe shape Download PDFInfo
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- CN112872576A CN112872576A CN202110060522.0A CN202110060522A CN112872576A CN 112872576 A CN112872576 A CN 112872576A CN 202110060522 A CN202110060522 A CN 202110060522A CN 112872576 A CN112872576 A CN 112872576A
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000004064 recycling Methods 0.000 title claims abstract description 18
- 239000007769 metal material Substances 0.000 title claims description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 86
- 239000002184 metal Substances 0.000 claims abstract description 86
- 239000000463 material Substances 0.000 claims abstract description 85
- 238000003466 welding Methods 0.000 claims abstract description 60
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 14
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 11
- 239000010935 stainless steel Substances 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 229910001257 Nb alloy Inorganic materials 0.000 claims description 3
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 3
- 229910001362 Ta alloys Inorganic materials 0.000 claims description 3
- 229910001093 Zr alloy Inorganic materials 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 150000002739 metals Chemical class 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 9
- 238000007689 inspection Methods 0.000 description 6
- 229910000934 Monel 400 Inorganic materials 0.000 description 5
- OANFWJQPUHQWDL-UHFFFAOYSA-N copper iron manganese nickel Chemical compound [Mn].[Fe].[Ni].[Cu] OANFWJQPUHQWDL-UHFFFAOYSA-N 0.000 description 5
- 229910001119 inconels 625 Inorganic materials 0.000 description 5
- 229910000881 Cu alloy Inorganic materials 0.000 description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 4
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 238000005498 polishing Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 229910052726 zirconium Inorganic materials 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910000601 superalloy Inorganic materials 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000012958 reprocessing Methods 0.000 description 2
- 238000009721 upset forging Methods 0.000 description 2
- 229910018054 Ni-Cu Inorganic materials 0.000 description 1
- 229910018481 Ni—Cu Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/24—Preliminary treatment
-
- 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
- B23P17/00—Metal-working operations, not covered by a single other subclass or another group in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention provides a method for recycling excess materials of tubular rod-shaped metals, belonging to the technical field of excess material recycling. The end surfaces of the metal bar excess materials or the metal pipe excess materials are processed to be flush, so that the end surfaces of the metal bar excess materials or the metal pipe excess materials which are flush are connected end to end for friction welding until materials which can be recycled are obtained; wherein the outer diameters of the metal bar remainders are the same; the outer diameters of the metal pipe remainders are the same, and the wall thicknesses are also the same. The invention processes the metal excess materials which can not meet the actual production by friction welding, realizes the effective utilization of the metal excess materials, has simple process and lower cost, and can obviously reduce the energy consumption.
Description
Technical Field
The invention relates to the technical field of excess material recycling, in particular to a method for recycling a rodlike pipe metal excess material.
Background
The metal material inevitably produces the clout in the production course of working, and these clouts can not satisfy the later stage processing requirement because of length to lose the value of utilization. Particularly, some metal materials have scarce resources and high price, and the more the excess materials are, the higher the production cost is. At present, the treatment mode of metal excess materials is recovery remelting reprocessing, the recovery reprocessing process is complex and long in working procedure, and materials are subjected to one-time smelting and plastic processing, so that energy waste is caused.
Disclosure of Invention
The invention aims to provide a method for recycling the excess metal materials in the shape of a pipe and a rod, which realizes the effective utilization of the excess metal materials, has simple process and lower cost and has the advantages of energy conservation and consumption reduction.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a method for recycling excess metal materials in a pipe shape, which comprises the following steps: processing the end faces of the metal bar excess material or the metal pipe excess material to be flush, and connecting the end faces of the metal bar excess material or the metal pipe excess material with the flush end faces to carry out friction welding until a material capable of being recycled is obtained; wherein the outer diameters of the metal bar remainders are the same; the outer diameters of the metal pipe remainders are the same, and the wall thicknesses are also the same.
Preferably, the rotation speed of a main shaft of the friction welding is 600-1000 rpm independently, the friction pressure is 3-50 MPa independently, the friction pressurization time is 0.5-10.0 s independently, the friction deformation is 2.0-11.0 mm independently, the upsetting pressure is 5-70 MPa independently, the upsetting pressurization time is 1.0-5.0 s independently, and the total deformation is 4.0-14.0 mm independently.
Preferably, the metal bar remainder or the metal pipe remainder is made of ferrous metal or nonferrous metal.
Preferably, the ferrous metal is stainless steel or alloy steel; the non-ferrous metal is titanium, titanium alloy, zirconium alloy, nickel alloy, niobium alloy, tantalum or tantalum alloy.
Preferably, the outer diameter of the metal bar remainder is 15 mm-200 mm.
Preferably, the outer diameter of the metal pipe excess material is 10 mm-219 mm, and the wall thickness is 3 mm-15 mm.
Preferably, the length of a single branch of the metal bar remainder or the metal pipe remainder is not less than 150 mm.
Preferably, after the friction welding is completed, the method further comprises removing flash at the welding seam.
The invention provides a method for recycling excess metal materials in a pipe shape, which comprises the following steps: processing the end faces of the metal bar excess material or the metal pipe excess material to be flush, and connecting the end faces of the metal bar excess material or the metal pipe excess material with the flush end faces to carry out friction welding until a material capable of being recycled is obtained; wherein the outer diameters of the metal bar remainders are the same; the outer diameters of the metal pipe remainders are the same, and the wall thicknesses are also the same.
The invention processes the metal excess materials which can not meet the actual production by friction welding, realizes the effective utilization of the metal excess materials, has simple process and lower cost, and can obviously reduce the energy consumption.
Detailed Description
The invention provides a method for recycling excess metal materials in a pipe shape, which comprises the following steps: processing the end faces of the metal bar excess material or the metal pipe excess material to be flush, and connecting the end faces of the metal bar excess material or the metal pipe excess material with the flush end faces to carry out friction welding until a material capable of being recycled is obtained; wherein the outer diameters of the metal bar remainders are the same; the outer diameters of the metal pipe remainders are the same, and the wall thicknesses are also the same.
The invention processes the end surface of the metal bar remainder or the metal pipe remainder to be flush.
In the present invention, the length of a single branch of the metal bar remnant or the metal pipe remnant is preferably not less than 150 mm.
In the invention, the shape of the metal bar excess material is preferably a round bar, and the outer diameter of the metal bar excess material is preferably 15mm to 200mm, more preferably 50mm to 180mm, and further preferably 70mm to 130 mm. In the invention, the outer diameters of the metal bar remainders are the same, the lengths of the metal bar remainders can be the same or different, and the requirement that the length of a single metal bar is not less than 150mm is met.
In the invention, the outer diameter of the metal pipe excess material is preferably 10-219 mm, more preferably 50-200 mm, and further preferably 80-150 mm; the wall thickness is preferably 3mm to 15mm, more preferably 5mm to 12mm, and further preferably 7 mm to 10 mm. In the present invention, the metal pipe remnants have the same outer diameter and the same wall thickness. According to the invention, the outer diameter of the metal pipe excess material is controlled within the range, so that on one hand, the metal pipe excess material can be prevented from being deformed due to too small wall thickness when being fixed by a clamp, and the phenomenon that the metal pipe excess material cannot be aligned and welded due to eccentric instability can be avoided, and on the other hand, the phenomenon that friction welding cannot be carried out due to too large wall thickness exceeding the limit of equipment can be avoided.
In the invention, the material of the metal bar remainder or the metal pipe remainder is preferably ferrous metal or nonferrous metal. The ferrous metal is not limited in any way in the present invention, and any ferrous metal known in the art may be used, and specifically, but not limited to, stainless steel or alloy steel. The non-ferrous metal is not limited in any way, and any non-ferrous metal known in the art can be used, and specifically, but not limited to, titanium alloy, zirconium alloy, nickel alloy, niobium alloy, tantalum or tantalum alloy. In the embodiment of the invention, the non-ferrous metal is specifically Inconel625 nickel-based superalloy, TC4 titanium alloy, R60702 pure zirconium, TA18 titanium alloy or Monel400 nickel-copper alloy; the ferrous metal is in particular 316L stainless steel.
The invention has no special requirement on the mode of end surface treatment, and can ensure that the end surface is level, in particular to polishing or lathe leveling.
After the end surfaces of the metal bar excess materials or the metal pipe excess materials are processed to be flush, the invention leads the end surfaces of the metal bar excess materials or the metal pipe excess materials with flush end surfaces to be connected for friction welding until the materials which can be recycled are obtained.
In the invention, the rotation speed of the main shaft of the friction welding is independently preferably 600-1000 rpm, more preferably 700-900 rpm, and further preferably 750-850 rpm; the friction pressure is independently preferably 3-50 MPa, more preferably 10-40 MPa, and further preferably 20-30 MPa; the friction pressurization time is preferably 0.5-10.0 s independently, more preferably 2-8 s, and further preferably 3-6 s; the friction deformation is independently preferably 2.0-11.0 mm, more preferably 4-10 mm, and further preferably 6-8 mm; the upsetting pressure is preferably 5-70 MPa, more preferably 10-60 MPa, and even more preferably 20-50 MPa independently; the upsetting and pressurizing time is preferably 1.0-5.0 s independently, more preferably 2-4 s, and further preferably 2.5-3.5 s; the total deformation is preferably 4.0-14.0 mm, more preferably 6-12 mm, and even more preferably 8-10 mm.
The invention has no special requirement on the length after friction welding and is determined according to the actual production requirement.
After the friction welding is completed, the invention preferably further comprises removing the flash at the welding seam. The method for removing the flash has no special requirement, and can be a removing method well known in the field, and specifically can be but is not limited to machining or grinding. In the invention, when the inner welding flash of the friction welded pipe is not easy to remove, the tubular metal remainder is preferably welded to the length of the inner welding flash which is easy to remove, and then the friction welding is continuously carried out.
Those skilled in the art can selectively forge, roll or machine the welded material according to actual requirements, and details are not described here.
The method for recycling the metal remnants in the shape of pipe or bar according to the present invention will be described in detail with reference to the following examples, but they should not be construed as limiting the scope of the present invention.
Example 1
The method for recycling the Inconel625 nickel-based superalloy round bar excess material comprises the following specific steps:
the method comprises the following steps: selecting Inconel625 nickel-based high-temperature alloy round bar excess material with the diameter of phi 15mm, and processing the end face of the round bar excess material to be flush in a polishing mode, wherein the processed length is not less than 150 mm.
Step two: and D, sequentially carrying out head-to-tail welding on the round bar excess materials which are processed to be flush in the step I in a friction welding mode. Setting friction welding parameters, main shaft rotating speed: 1000rpm, friction pressure: 10MPa, friction pressurization time: 5.0s, frictional deformation amount: 2.0mm, upset pressure: 30MPa, upset forging pressing time: 2.0s, total deformation: 4.0 mm.
Step three: and removing welding burrs at the welding seams by adopting a polishing mode, and rolling the bar materials with the welding burrs removed to obtain the Inconel625 nickel-based high-temperature alloy rolled bar material with the diameter of phi 8 mm. Through inspection, the mechanical property and the structure of the bar can meet the use requirement of the product. The room temperature mechanical properties are shown in table 1.
TABLE 1 Inconel625 Ni-based superalloy round bar excess material room temperature mechanical properties
| Material | Rm，MPa | Rp0.2，MPa | A，％ |
| Weld zone | 1110 | 860 | 9 |
| Mother body | 1120 | 875 | 11 |
In tables 1 to 6, RmRepresents tensile strength, Rp0.2Represents the plastic elongation strength, and A represents the elongation after fracture.
Example 2
The method for repeatedly recycling the excess stock of the TC4 titanium alloy round bar comprises the following specific steps:
the method comprises the following steps: selecting TC4 titanium alloy round bar excess material with the diameter of phi 100mm, and enabling the end face of the round bar excess material to be flush through a lathe, wherein the length after treatment is not less than 150 mm.
Step two: and D, sequentially carrying out head-to-tail welding on the round bar excess materials which are processed to be flush in the step I in a friction welding mode. Setting friction welding parameters, main shaft rotating speed: 800rpm, friction pressure: 30MPa, friction pressurization time: 8.0s, frictional deformation amount: 3.0mm, upset pressure: 50MPa, upset forging pressing time: 4.0s, total deformation: 5.0 mm.
Step three: and removing welding burrs at the welding seams by adopting a polishing mode, and carrying out precision forging and rolling on the bar materials with the welding burrs removed to obtain TC4 rolled bar materials with the diameter phi of 30 mm. Through inspection, the mechanical property and the structure of the bar can reach the level of the bar produced by using the new material. The room temperature mechanical properties are shown in Table 2.
TABLE 2 TC4 titanium alloy round bar excess material room temperature mechanical property
| Material | Rm，MPa | Rp0.2，MPa | A，％ |
| Weld zone | 965 | 898 | 13.0 |
| Mother body | 968 | 905 | 14.0 |
Example 3
The method for recycling the R60702 pure zirconium round bar excess material comprises the following specific steps:
the method comprises the following steps: selecting R60702 pure zirconium round bar excess material with the diameter of phi 200mm, enabling the length to be not less than 150mm, enabling the end face of the round bar excess material to be flush through a lathe, and enabling the processed length to be not less than 150 mm.
Step two: and D, sequentially carrying out head-to-tail welding on the round bar excess materials which are processed to be flush in the step I in a friction welding mode. Setting friction welding parameters, main shaft rotating speed: 600rpm, friction pressure: 50MPa, friction pressurization time: 10.0s, frictional deformation amount: 5.0mm, upset pressure: 70MPa, upsetting and pressurizing time: 5.0s, total deformation: 7.0 mm.
Step three: and removing welding burrs at the welding seams by adopting a machining mode, and performing precision forging on the bar stock after the welding burrs are removed to obtain an R60702 precision-forged bar stock with the diameter of phi 55 mm. Through inspection, the mechanical property and the structure of the bar can reach the level of the bar produced by using the new material. The room temperature mechanical properties are shown in Table 3.
TABLE 3R 60702 mechanical properties at room temperature of pure zirconium round bar remainders
| Material | Rm，MPa | Rp0.2，MPa | A，％ |
| Weld zone | 456 | 259 | 26.0 |
| Mother body | 455 | 260 | 26.5 |
Example 4
The method for recycling the TA18 titanium alloy circular tube excess material comprises the following specific steps:
the method comprises the following steps: selecting TA18 titanium alloy circular tube remnants with the outer diameter phi of 10mm and the wall thickness of 3mm, and enabling the end face of the circular tube to be flush through a lathe, wherein the processed length is not less than 150 mm.
Step two: and D, sequentially welding the parallel and level round pipes processed in the step I in a friction welding mode. Setting friction welding parameters, main shaft rotating speed: 900rpm, friction pressure: 3MPa, friction pressurization time: 0.5s, frictional deformation amount: 4.0mm, upset pressure: 5MPa, upsetting and pressurizing time: 1.0s, total deformation: 6.0 mm.
Step three: the inner and outer welding flashes at the welding seam of the pipe are removed by adopting a peeling and boring mode, and when the inner flashes in the friction welded pipe are not easy to remove, the pipe can be welded to the length which is easy to remove the inner flashes, and then the welding is continued. And rolling the round pipe without the welding flash to obtain the TA18 pipe with the outer diameter of phi 6mm and the wall thickness of 1.5 mm. Through inspection, the mechanical property and the structure of the pipe can reach the level of the pipe produced by using the new material. The room temperature mechanical properties are shown in Table 4.
TABLE 4 TA18 titanium alloy round tube remainder room temperature mechanical properties
| Material | Rm，MPa | Rp0.2，MPa | A，％ |
| Weld zone | 698 | 563 | 19.0 |
| Mother body | 705 | 569 | 21.5 |
Example 5
The method for recycling the Monel400 nickel-copper alloy circular tube excess material comprises the following specific steps:
the method comprises the following steps: selecting Monel400 nickel-copper alloy circular tube remnants with the outer diameter of phi 89mm and the wall thickness of 8mm, enabling the length to be not less than 150mm, enabling the end faces of the circular tube remnants to be flush through a lathe, and enabling the length after treatment to be not less than 150 mm.
Step two: and D, sequentially carrying out head-to-tail welding on the round pipe excess materials which are processed to be flush in the step I in a friction welding mode. Setting friction welding parameters, main shaft rotating speed: 850rpm, friction pressure: 5MPa, friction pressurization time: 1.2s, frictional deformation: 6.0mm, upset pressure: 10MPa, upsetting and pressurizing time: 1.5s, total deformation: 8.5 mm.
Step three: the inner and outer welding flashes at the welding seam of the pipe are removed by adopting a peeling and boring mode, and when the inner flashes in the friction welded pipe are not easy to remove, the pipe can be welded to the length which is easy to remove the inner flashes, and then the welding is continued. And rolling the circular pipe with the welding flash removed to obtain the Monel400 nickel-copper alloy pipe with the outer diameter of phi 70mm and the wall thickness of 4 mm. Through inspection, the mechanical property and the structure of the pipe can reach the level of the pipe produced by using the new material.
The room temperature mechanical properties are shown in table 5.
TABLE 5 Monel400 Ni-Cu alloy pipe remainder room temperature mechanical properties
| Material | Rm，MPa | Rp0.2，MPa | A，％ |
| Weld zone | 479 | 171 | 33.5 |
| Mother body | 483 | 170 | 35.0 |
Example 6
The method for recycling the excess materials of the 316L stainless steel round pipe comprises the following specific steps:
the method comprises the following steps: selecting 316L stainless steel circular tube remnants with the outer diameter phi of 219mm and the wall thickness of 15mm, and enabling the end faces of the circular tube remnants to be flush through a lathe, wherein the length after treatment is not less than 150 mm.
Step two: and D, sequentially carrying out head-to-tail welding on the round pipe excess materials which are processed to be flush in the step I in a friction welding mode. Setting friction welding parameters, main shaft rotating speed: 650rpm, friction pressure: 8MPa, friction pressurization time: 2.0s, frictional deformation amount: 11.0mm, upset pressure: 15MPa, upsetting and pressurizing time: 3.0s, total deformation: 14.0 mm.
Step three: the inner and outer welding flashes at the welding seam of the pipe are removed by adopting a peeling and boring mode, and when the inner flashes in the friction welded pipe are not easy to remove, the pipe can be welded to the length which is easy to remove the inner flashes, and then the welding is continued. The round tube from which the welding flash was removed was rolled to obtain a 316L stainless steel pipe material having an outer diameter of phi 168mm and a wall thickness of 5 mm. Through inspection, the mechanical property and the structure of the pipe can reach the level of the pipe produced by using the new material. The room temperature mechanical properties are shown in Table 6.
Table 6316L stainless steel round pipe excess material room temperature mechanical property
| Material | Rm，MPa | Rp0.2，MPa | A，％ |
| Weld zone | 556 | 290 | 52 |
| Mother body | 561 | 293 | 55 |
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A method for recycling excess metal materials in a pipe-rod shape is characterized by comprising the following steps: processing the end faces of the metal bar excess material or the metal pipe excess material to be flush, and connecting the end faces of the metal bar excess material or the metal pipe excess material with the flush end faces to carry out friction welding until a material capable of being recycled is obtained; wherein the outer diameters of the metal bar remainders are the same; the outer diameters of the metal pipe remainders are the same, and the wall thicknesses are also the same.
2. The method according to claim 1, wherein the main shaft rotation speed of the friction welding is 600 to 1000rpm independently, the friction pressure is 3 to 50MPa independently, the friction pressurization time is 0.5 to 10.0s independently, the friction deformation is 2.0 to 11.0mm independently, the upset pressure is 5 to 70MPa independently, the upset pressurization time is 1.0 to 5.0s independently, and the total deformation is 4.0 to 14.0mm independently.
3. The method of claim 1, wherein the metal bar scrap or metal tube scrap is ferrous or non-ferrous metal.
4. The method of claim 3, wherein the ferrous metal is stainless steel or alloy steel; the non-ferrous metal is titanium, titanium alloy, zirconium alloy, nickel alloy, niobium alloy, tantalum or tantalum alloy.
5. The method of claim 1, wherein the remainder of the metal bar has an outer diameter of 15mm to 200 mm.
6. The method according to claim 1, wherein the metal pipe remnant has an outer diameter of 10mm to 219mm and a wall thickness of 3mm to 15 mm.
7. The method of claim 1, wherein the single strand length of the slug of metal bar or the slug of metal tube is not less than 150 mm.
8. The method of claim 1, further comprising removing flash at the weld after the friction welding is completed.
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|---|---|---|---|---|
| JP2000094157A (en) * | 1998-09-21 | 2000-04-04 | Kawatetsu Techno-Construction Co Ltd | Construction method using frictional joining |
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-
2021
- 2021-01-18 CN CN202110060522.0A patent/CN112872576A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000094157A (en) * | 1998-09-21 | 2000-04-04 | Kawatetsu Techno-Construction Co Ltd | Construction method using frictional joining |
| CN101758062A (en) * | 2010-02-26 | 2010-06-30 | 河南省电力公司济源供电公司 | Scrap steel strip recovery method |
| CN107695508A (en) * | 2017-10-10 | 2018-02-16 | 青海西矿杭萧钢构有限公司 | A kind of assembling and welding method of steel pipe bundle |
| CN109933843A (en) * | 2018-11-05 | 2019-06-25 | 中铁九局集团第二工程有限公司 | Intelligent reinforcing bar based on BIM covers blanking construction method |
| CN111015110A (en) * | 2019-12-23 | 2020-04-17 | 西部金属材料股份有限公司 | Preparation method of metal pipe fitting difficult to deform |
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| Title |
|---|
| 伊晨: "热力工程中旧管再利用探讨", 《中国设备工程》 * |
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