CN104399773A - Processing technology for high-grade steel seamless metallurgical composite pipe - Google Patents
Processing technology for high-grade steel seamless metallurgical composite pipe Download PDFInfo
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- CN104399773A CN104399773A CN201410699686.8A CN201410699686A CN104399773A CN 104399773 A CN104399773 A CN 104399773A CN 201410699686 A CN201410699686 A CN 201410699686A CN 104399773 A CN104399773 A CN 104399773A
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- metal pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
Abstract
A processing technology for a high-grade steel seamless metallurgical composite pipe comprises the following processing steps: 1, carrying out turning finish on the inner surface of an outer composite metal pipe blank and the outer surface of an inner metal pipe blank; 2, washing the processed surfaces of the outer and inner composite metal pipe blanks, arranging together in a sleeving way, and fixing the two ends; 3, sealing and processing the two end surfaces of the composite metal pipe blank assembled well; 4, carrying out hot reaming and hot extrusion on the composite metal pipe blank processed well to form an extruded pierced billet; 5, clearing oxide and glass powder on the inner and outer surfaces of the extruded pierced billet, and coping; 6, cold-rolling the extruded pierced billet processed well by a cyclical cold-rolling pipe process; 7, carrying out hardening and tempering refining processing on the cold-rolled composite metal pipe blank. The strength of the outer carbon steel is higher than or equal to that of an X70 steel grade, so that the outer carbon steel plays an excellent corrosion resistant role on the inner layer. The strength and the tenacity of a base material are greatly improved, and the material cost and the alloying element variety and quality are reduced.
Description
Technical field
The present invention relates to metallurgical composite pipe, particularly relating to a kind of for carrying the processing technology of the seamless metallurgical composite pipe of Hi-grade steel of corrosion and high-pressure fluid.
Background technology
Along with the development of society, the demand of the mankind to resource is increasing, and some is non-renewable.As the part metals element in corrosion resistant alloy, the demand in anti-corrosion pipeline such as nickel, molybdenum and chromium is larger.In order to save these precious metals, it is corrosion resistant alloy that people seek internal layer, and skin is the composite of carbon steel, to reduce costs, improves the service life of tubing.
By the bond strength of basic unit and coating, multiple tube can be divided into: mechanical composite tube and metallurgical composite pipe.Metallurgical composite pipe can be divided into again composite plate to weld and seamless metallurgical composite pipe.Due to metallurgical composite pipe, there is basic unit and coating bond strength is high, it is convenient to construct and be easy to process the advantages such as pipe fitting.Therefore, conveying corrosion and high-pressure fluid is widely used in.In order to improve the performance of seamless metallurgical composite pipe material further, so that in use, playing good corrosion-resistant effect, extending the service life of seamless metallurgical composite pipe, need exploitation basic unit carbon steel intensity to be more than or equal to the composite pipe of X70 grade of steel.
Summary of the invention
Main purpose of the present invention is to overcome the above-mentioned shortcoming that prior art exists, and provides the processing technology of the seamless metallurgical composite pipe of a kind of Hi-grade steel, its not only outer carbon steel intensity can, greater than or equal to X70 grade of steel, make internal layer play good corrosion-resistant effect; And, greatly improve intensity and the toughness of base material, reduce material cost and alloy element kind and quality.
The object of the invention is to be realized by following technical scheme:
A processing technology for metallurgical composite pipe that Hi-grade steel is seamless, is characterized in that: adopt following procedure of processing:
The first step: carry out turning fine finishining, smoothness requirements with the external layers composite metal internal surface of bloom of lathe and inner layer metal outer surface of tube blank: Ra≤3.2;
Second step: the skin after processing and internal layer composition metal pipe surface are cleaned, and be set in together in longitudinal concentric mode, two ends argon arc welding spot welding is fixed;
3rd step: to the composition metal pipe both ends of the surface soldering and sealing assembled and processing:
1. soldering and sealing is carried out to the composition metal pipe both ends of the surface chamfering place assembled, and adopt the inner surface of boring machine fine finishining composite pipe blank, fineness: Ra≤1.6 μm;
2. the hot reaming horn mouth of lathe in machining is adopted;
4th step: the composition metal pipe processed carried out hot reaming, hot extrusion:
(1) the composition metal pipe processed is carried out preheating in annular furnace, then, carry out first time eddy-current heating in first time induction furnace after, come out of the stove, horizontal high voltage water de-scaling of going forward side by side, surfaces externally and internally glass dust lubrication, hot reaming, high-pressure water descaling;
(2) after carrying out secondary eddy-current heating again in second time induction furnace, come out of the stove, by lubricating surfaces externally and internally glass dust, hot extrusion, forms extruding hollow forging;
5th step: the oxide of cleaning extruding hollow forging surfaces externally and internally and glass dust, to the dell on extruding hollow forging, sticks up skin defect and carries out reconditioning;
6th step: adopt cold pilgered pipe method to carry out cold rolling the extruding hollow forging handled well;
7th step: the composition metal pipe after cold rolling is carried out hardening+temper process.
Described outer composition metal pipe material adopts carbon steel X70, the component content scope of outer composition metal pipe is: carbon is 0.08-0.12%, manganese is 1.2-1.6%, vanadium is 0.03-0.06%, and niobium is 0.02-0.04%, and phosphorus is≤0.015%, sulphur is≤0.01%, chromium is 0.1-0.3%, Ni be 0.1-0.3%, Mo is 0.05-0.1%; Inner layer metal pipe material adopts Stainless steel 316 L; Gap between skin and internal layer composition metal pipe is: 1.2mm.
In described 4th step, preheat temperature is: 800 DEG C, and preheating time is 2.5h; Induction heating temperature is for the first time: 1100 DEG C; High-pressure water descaling pressure is: 15Mpa; Second time induction heating temperature is: 1170 DEG C; Extrusion speed is: 180-200mm/s.
In described 6th step, the deflection after cold rolling is greater than: 50%; After cold rolling, then carry out alkali cleaning and deoil.
In described 7th step, temperature during temper process is: be more than or equal to 550 DEG C.
Beneficial effect of the present invention: the present invention due to adopt technique scheme, its not only outer carbon steel intensity can, greater than or equal to X70 grade of steel, make internal layer play good corrosion-resistant effect; And, greatly improve intensity and the toughness of base material, reduce material cost and alloy element kind and quality.
Detailed description of the invention
The present invention adopts following procedure of processing:
The first step: the processing of ectonexine composition metal pipe:
Outer layer metal pipe material adopts carbon steel X70, the component content scope of outer composition metal pipe is: carbon is 0.08-0.12%, manganese is 1.2-1.6%, vanadium is 0.03-0.06%, and niobium is 0.02-0.04%, and phosphorus is≤0.015%, sulphur is≤0.01%, chromium is 0.1-0.3%, Ni be 0.1-0.3%, Mo is 0.05-0.1%;
Inner layer metal pipe material adopts Stainless steel 316 L, carries out turning fine finishining, smoothness requirements: Ra≤3.2 with lathe to outer metal pipe billet inner surface and inner layer metal outer surface of tube blank;
Second step: the carrying out of the ectonexine composition metal pipe processed is assembled:
Skin after processing and internal layer composition metal pipe surface are cleaned, ensure without greasy dirt and other foreign material, and be set in together in longitudinal concentric mode, the gap 1.2mm between skin and internal layer composition metal pipe, two ends adopt argon arc welding spot welding to fix;
3rd step: to the composition metal both ends of the surface soldering and sealing assembled and processing:
(1) soldering and sealing is carried out to the composition metal pipe both ends of the surface chamfering place assembled, and adopt the inner surface of boring machine fine finishining composite pipe blank, fineness: Ra≤1.6 μm;
(2) adopt numerically controlled lathe, programming Control processes hot reaming horn mouth;
4th step: the composition metal pipe processed carried out hot reaming, hot extrusion:
1. the composition metal pipe preheating in annular furnace will processed, then, after carrying out first time eddy-current heating, comes out of the stove in an induction furnace, horizontal high voltage water de-scaling of going forward side by side, and surfaces externally and internally glass dust lubricates, hot reaming, high-pressure water descaling;
2. after carrying out second time eddy-current heating again in second time induction furnace, come out of the stove, by lubricating surfaces externally and internally glass dust, hot extrusion, forms extruding hollow forging; Wherein, preheat temperature is: 800 DEG C, and preheating time is: 2.5h; Induction heating temperature is for the first time: 1100 DEG C; High-pressure water descaling pressure is: 15Mpa; Second time induction heating temperature is: 1170 DEG C; Extrusion speed is: 180-200mm/s;
5th step: extruding hollow forging process: adopt the mode of ball blast and sandblasting to clear up oxide and the glass dust of extruding hollow forging surfaces externally and internally, to the dell on extruding hollow forging, sticks up the defects such as skin and carries out reconditioning;
6th step: hollow forging is cold rolling: adopt cold pilgered pipe method to carry out cold rolling the extruding hollow forging handled well, deflection is greater than 50%, and cold rolling rear alkali cleaning is deoiled;
7th step: heat treatment: the composition metal pipe after cold rolling is carried out hardening+temper process, during process, adjustment glowing furnace is reducing atmosphere, ensures that carbon steel oxidation is the least possible; Temperature is: be more than or equal to 550 DEG C.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (5)
1. a processing technology for the seamless metallurgical composite pipe of Hi-grade steel, is characterized in that: adopt following procedure of processing:
The first step: carry out turning fine finishining, smoothness requirements with the external layers composite metal internal surface of bloom of lathe and inner layer metal outer surface of tube blank: Ra≤3.2;
Second step: the skin after processing and internal layer composition metal pipe surface are cleaned, and be set in together in longitudinal concentric mode, two ends argon arc welding spot welding is fixed;
3rd step: to the composition metal pipe both ends of the surface soldering and sealing assembled and processing:
1. soldering and sealing is carried out to the composition metal pipe both ends of the surface chamfering place assembled, and adopt the inner surface of boring machine fine finishining composite pipe blank, fineness: Ra≤1.6 μm;
2. the hot reaming horn mouth of lathe in machining is adopted;
4th step: the composition metal pipe processed carried out hot reaming, hot extrusion:
(1) the composition metal pipe processed is carried out preheating in annular furnace, then, carry out first time eddy-current heating in first time induction furnace after, come out of the stove, horizontal high voltage water de-scaling of going forward side by side, surfaces externally and internally glass dust lubrication, hot reaming, high-pressure water descaling;
(2) after carrying out secondary eddy-current heating again in second time induction furnace, come out of the stove, by lubricating surfaces externally and internally glass dust, hot extrusion, forms extruding hollow forging;
5th step: the oxide of cleaning extruding hollow forging surfaces externally and internally and glass dust, to the dell on extruding hollow forging, sticks up skin defect and carries out reconditioning;
6th step: adopt cold pilgered pipe method to carry out cold rolling the extruding hollow forging handled well;
7th step: the composition metal pipe after cold rolling is carried out hardening+temper process.
2. the processing technology of the seamless metallurgical composite pipe of Hi-grade steel according to claim 1, it is characterized in that: described outer composition metal pipe material adopts carbon steel X70, the component content scope of outer composition metal pipe is: carbon is 0.08-0.12%, and manganese is 1.2-1.6%, and vanadium is 0.03-0.06%, niobium is 0.02-0.04%, phosphorus is≤0.015%, and sulphur is≤0.01%, and chromium is 0.1-0.3%, Ni is 0.1-0.3%, Mo is 0.05-0.1%;
Inner layer metal pipe material adopts Stainless steel 316 L; Gap between skin and internal layer composition metal pipe is: 1.2mm.
3. the processing technology of the seamless metallurgical composite pipe of Hi-grade steel according to claim 1, is characterized in that: in described 4th step, preheat temperature is: 800 DEG C, and preheating time is 2.5h; Induction heating temperature is for the first time: 1100 DEG C; High-pressure water descaling pressure is: 15Mpa; Second time induction heating temperature is: 1170 DEG C; Extrusion speed is: 180-200mm/s.
4. the processing technology of the seamless metallurgical composite pipe of Hi-grade steel according to claim 1, is characterized in that: in described 6th step, the deflection after cold rolling is greater than: 50%; After cold rolling, then carry out alkali cleaning and deoil.
5. the processing technology of the seamless metallurgical composite pipe of Hi-grade steel according to claim 1, is characterized in that: in described 7th step, temperature during temper process is: be more than or equal to 550 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410699686.8A CN104399773A (en) | 2014-11-27 | 2014-11-27 | Processing technology for high-grade steel seamless metallurgical composite pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410699686.8A CN104399773A (en) | 2014-11-27 | 2014-11-27 | Processing technology for high-grade steel seamless metallurgical composite pipe |
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| CN104399773A true CN104399773A (en) | 2015-03-11 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6076291A (en) * | 1983-10-03 | 1985-04-30 | Kuroki Kogyosho:Kk | Production of clad steel pipe |
| JPH058057A (en) * | 1991-03-01 | 1993-01-19 | Sumitomo Metal Ind Ltd | Manufacture of double metal tube |
| CN1346718A (en) * | 2001-10-22 | 2002-05-01 | 亓登利 | Process for preparing seamless composite metal pipe |
| CN102284546A (en) * | 2011-06-22 | 2011-12-21 | 汪正友 | Method and special die for manufacturing composite pipeline |
| CN103481033A (en) * | 2013-09-25 | 2014-01-01 | 新兴铸管股份有限公司 | Manufacturing method for double-metal seamless steel pipe through machining, assembling and extruding |
| CN104028957A (en) * | 2014-05-19 | 2014-09-10 | 新兴铸管股份有限公司 | Method for manufacturing hot extrusion composite bimetallic seamless steel tube |
-
2014
- 2014-11-27 CN CN201410699686.8A patent/CN104399773A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6076291A (en) * | 1983-10-03 | 1985-04-30 | Kuroki Kogyosho:Kk | Production of clad steel pipe |
| JPH058057A (en) * | 1991-03-01 | 1993-01-19 | Sumitomo Metal Ind Ltd | Manufacture of double metal tube |
| CN1346718A (en) * | 2001-10-22 | 2002-05-01 | 亓登利 | Process for preparing seamless composite metal pipe |
| CN102284546A (en) * | 2011-06-22 | 2011-12-21 | 汪正友 | Method and special die for manufacturing composite pipeline |
| CN103481033A (en) * | 2013-09-25 | 2014-01-01 | 新兴铸管股份有限公司 | Manufacturing method for double-metal seamless steel pipe through machining, assembling and extruding |
| CN104028957A (en) * | 2014-05-19 | 2014-09-10 | 新兴铸管股份有限公司 | Method for manufacturing hot extrusion composite bimetallic seamless steel tube |
Non-Patent Citations (1)
| Title |
|---|
| 付现桥等: "X70/316L不锈钢复合钢管焊接接头性能研究", 《电焊机》 * |
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Application publication date: 20150311 |