CN106111728A - A kind of seamless pipe hot extrusion technique - Google Patents
A kind of seamless pipe hot extrusion technique Download PDFInfo
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- CN106111728A CN106111728A CN201610620494.2A CN201610620494A CN106111728A CN 106111728 A CN106111728 A CN 106111728A CN 201610620494 A CN201610620494 A CN 201610620494A CN 106111728 A CN106111728 A CN 106111728A
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- Prior art keywords
- seamless pipe
- hot extrusion
- annealing
- extrusion technique
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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
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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
- B21C23/00—Extruding metal; Impact extrusion
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- Mechanical Engineering (AREA)
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Abstract
The invention discloses a kind of seamless pipe hot extrusion technique, comprise the following steps: (1) selects materials；(2) examination of materials；(3) annealing；(4) deburring and quenching；(5) roughing: to material fixing and cutting on sawing machine, and carry out oil removal treatment, stay the allowance for finish of 0.3mm；(6) polish: first use and the material after roughing is carried out ultrasonic waves for cleaning, electroplate after cleaning, then uses annular furnace to carry out hot extrusion, then carries out carburizing nitrogen process；(7) finished product: the seamless pipe after process is polished, adds after polishing and protects oil immersion molten, obtain seamless pipe.The seamless pipe that processing technique of the present invention obtains reaches concerned countries standard.
Description
Technical field
The present invention relates to a kind of metal processing sectors, specifically a kind of seamless pipe hot extrusion technique.
Background technology
Hot extrusion technique is to utilize the high pressure of pressure ram transmission on extruder, and the blank that would be enclosed in recipient is squeezed into
A kind of advanced plastic processing method with mold shape same article.Improve the deformability of metal owing to it has, goods are combined
Closing the advantages such as quality is high, product scope is wide, product is widely used in the fields such as building, aviation, traffic, communication.Therefore, hot extrusion
The technology that shapes occupies extremely important status in national economy.In recent years, along with China's nuclear power, petrochemical industry, station boiler
The fast development of industry, the demand for high alloy, special alloy seamless steel pipe increases severely with day, simultaneously to nuclear power, petrochemical industry and electricity
Boiler pipe performance requirement of standing is the harshest, and the deformation of material difficulty is the most sufficiently expensive, and Hot-extrusion has the advantage that because of it, becomes
For producing high alloy, the important method of special alloy seamless steel pipe, cause common concern both domestic and external.China's Steel Pipe Heat extruding
Technology slower development, and the bigger gap of external existence, therefore, it is necessary to understanding and grasp Steel Pipe Heat the most both at home and abroad extrudes skill
Art, equipment and technique, provide enlightenment for development China Steel Pipe Heat extrusion technique further.Looking back hot extrusion the most both at home and abroad herein
On the basis of pressure technology and equipment, describe the basic procedure of Steel Pipe Heat extrusion process, it is proposed that China's Steel Pipe Heat extrusion technique
Problem demanding prompt solution and development trend.In recent years, the hot-pressed technology of seamless pipe is more and more by the weight of people
The following aspects is mainly had: (1) heat extruder apparatus for production line depending on, the development trend of current China and problem demanding prompt solution
Production domesticization.Due to the high speed development of China's economic technology, the demand of special alloy tubing was increased severely with day.And it is the most domestic
Mostly steel extrusion line equipment is from external introduction, and this just requires to accelerate steel extrusion process and the research of equipment, real as early as possible
The production domesticization of existing steel extrusion line equipment.(2) research of high-temperature lubricant.Lubricant for hot-pressed product quality and
Tool and mould life-span important, therefore, research is suitable for the lubricant of different steel grade, to improve the comprehensive quality of product,
Alleviating die wear is problem the most in the urgent need to address.(3) die life and the research of precision.During hot extrusion, mould holds
By High Temperature High Pressure and the compound action that rubs by force, have a strong impact on the quality of mold use life-span and product.Therefore, to mould material
Material and mould structure design are studied, and are also one of problems that solution is presently required.(4) research of continuously cast billet for pipe-making.To intensity height
For the high alloy of difficult deformation, the most basic employing forging stock and rolling mill practice produce pipe.And steel yielding to rustless steel etc
Kind, carry out continuously cast billet for pipe-making technical study, simplify operation, improve lumber recovery, reduce cost, improve the market competitiveness, imperative.
Summary of the invention
It is an object of the invention to provide a kind of seamless pipe hot extrusion technique, this technique can reduce the input of material and become
This, this technique can improve the manufacturing speed of seamless pipe simultaneously, reduces manufacture difficulty.
For achieving the above object, the present invention provides following technical scheme:
A kind of seamless pipe hot extrusion technique, comprises the following steps:
(1) select materials: choose the terne metal of a diameter of 5mm as material；
(2) examination of materials: according to the specific requirement of seamless pipe, carries out parametric test to material, and select the most qualified
Material, reaches the requirement of any surface finish, flawless, residue, rusty stain simultaneously；
(3) annealing: being put into by material and carry out in annealing furnace annealing for the first time, annealing temperature maintains 560 DEG C, and the time controls
At 33min, heat, but to room temperature, carries out second time subsequently and anneals, and annealing temperature maintains 942 DEG C, and the time controls at 40min, heat
But to room temperature；
(4) deburring and quenching: the burr using flash trimmer to carry out material surface is removed, and keeps the coarse of material surface
Degree is less than 0.5, and the roughness of side, material two ends is less than 0.2, is subsequently placed in glowing furnace and quenches, and hardening heat is maintained at
890 DEG C, after 1.5h, under helium is protected, heat is but to about 25 DEG C, and hardness reaches more than HRB70 and can proceed after tested；
(5) roughing: to material fixing and cutting on sawing machine, and carry out oil removal treatment, stay more than the polish of 0.3mm
Amount；
(6) polish: first use and the material after roughing is carried out ultrasonic waves for cleaning, electroplate after cleaning, then adopt
Carry out hot extrusion with annular furnace, then carry out carburizing nitrogen process；
(7) finished product: the seamless pipe after process is polished, adds after polishing and protects oil immersion molten, obtain seamless pipe.
As the further scheme of the present invention: 7075 models selected by described magnalium, magnesium and the ratio of aluminum in magnalium
Example is 0.4:1.3.
As the further scheme of the present invention: described annealing furnace is spheroidizing annealing furnace.
As the further scheme of the present invention: described electroplating technique is: pretreated material is put into dithia ring
As negative electrode in compound cyanogen-free silver-plating solution, it is 2.7A/dm in cathode-current density2, temperature is electric under conditions of being 32 DEG C
Plate 12 minutes, after plating, material is taken out, successively through adverse current washing, go out light, adverse current washing, passivation, adverse current washing, close, low
Temperature is dried,.
As the further scheme of the present invention: described protection oil uses tween.
Compared with prior art, the invention has the beneficial effects as follows:
Production technology of the present invention has the advantage that 1, technological process is simple, constant product quality, with short production cycle；2、
Production process is few, greatly reduces production cost；3, the weight of product decreases 23%, substantially increases raw-material utilization
Rate..
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all
Belong to the scope of protection of the invention.
A kind of seamless pipe hot extrusion technique, comprises the following steps:
(1) select materials: choose the terne metal of a diameter of 5mm as material；
(2) examination of materials: according to the specific requirement of seamless pipe, carries out parametric test to material, and select the most qualified
Material, reaches the requirement of any surface finish, flawless, residue, rusty stain simultaneously；
(3) annealing: being put into by material and carry out in annealing furnace annealing for the first time, annealing temperature maintains 560 DEG C, and the time controls
At 33min, heat, but to room temperature, carries out second time subsequently and anneals, and annealing temperature maintains 942 DEG C, and the time controls at 40min, heat
But to room temperature；
(4) deburring and quenching: the burr using flash trimmer to carry out material surface is removed, and keeps the coarse of material surface
Degree is less than 0.5, and the roughness of side, material two ends is less than 0.2, is subsequently placed in glowing furnace and quenches, and hardening heat is maintained at
890 DEG C, after 1.5h, under helium is protected, heat is but to about 25 DEG C, and hardness reaches more than HRB70 and can proceed after tested；
(5) roughing: to material fixing and cutting on sawing machine, and carry out oil removal treatment, stay more than the polish of 0.3mm
Amount；
(6) polish: first use and the material after roughing is carried out ultrasonic waves for cleaning, electroplate after cleaning, then adopt
Carry out hot extrusion with annular furnace, then carry out carburizing nitrogen process；
(7) finished product: the seamless pipe after process is polished, adds after polishing and protects oil immersion molten, obtain seamless pipe.
7075 models selected by described magnalium, and in magnalium, magnesium is 0.4:1.3 with the ratio of aluminum；Described annealing furnace is
Spheroidizing annealing furnace；Described electroplating technique is: pretreated material is put into dithia cycle compound cyanogen-free silver-plating solution
Middle as negative electrode, it is 2.7A/dm in cathode-current density2, temperature is electroplated 12 minutes, by material after plating under conditions of being 32 DEG C
Take out, successively through adverse current washing, go out light, adverse current washing, passivation, adverse current washing, close, cold drying,；Described protection oil
Use tween.
The seamless pipe prepared according to above-mentioned processing technique meets GB/T8162-2008 standard.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of the spirit or essential attributes of the present invention, it is possible to realize the present invention in other specific forms.Therefore, no matter
From the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all by fall in the implication of equivalency and scope of claim
Change is included in the present invention.
Although moreover, it will be appreciated that this specification is been described by according to embodiment, but the most each embodiment only wraps
Containing an independent technical scheme, this narrating mode of description is only that for clarity sake those skilled in the art should
Description can also be formed those skilled in the art through appropriately combined as an entirety, the technical scheme in each embodiment
May be appreciated other embodiments.
Claims (5)
1. a seamless pipe hot extrusion technique, it is characterised in that comprise the following steps:
(1) select materials: choose the terne metal of a diameter of 5mm as material；
(2) examination of materials: according to the specific requirement of seamless pipe, material is carried out parametric test, and selects the most qualified material,
Reach the requirement of any surface finish, flawless, residue, rusty stain simultaneously；
(3) annealing: being put into by material and carry out in annealing furnace annealing for the first time, annealing temperature maintains 560 DEG C, and the time controls
33min, heat, but to room temperature, carries out second time subsequently and anneals, and annealing temperature maintains 942 DEG C, and the time controls at 40min, and heat is but
To room temperature；
(4) deburring and quenching: the burr using flash trimmer to carry out material surface is removed, and the roughness keeping material surface is low
In 0.5, the roughness of side, material two ends is less than 0.2, is subsequently placed in glowing furnace and quenches, and hardening heat is maintained at 890
DEG C, after 1.5h, under helium is protected, heat is but to about 25 DEG C, and hardness reaches more than HRB70 and can proceed after tested；
(5) roughing: to material fixing and cutting on sawing machine, and carry out oil removal treatment, stay the allowance for finish of 0.3mm；
(6) polish: first use and the material after roughing is carried out ultrasonic waves for cleaning, electroplate after cleaning, then uses ring
Shape stove carries out hot extrusion, then carries out carburizing nitrogen process；
(7) finished product: the seamless pipe after process is polished, adds after polishing and protects oil immersion molten, obtain seamless pipe.
Seamless pipe hot extrusion technique the most according to claim 1, it is characterised in that 7075 types selected by described magnalium
Number, in magnalium, magnesium is 0.4:1.3 with the ratio of aluminum.
Seamless pipe hot extrusion technique the most according to claim 1 and 2, it is characterised in that described annealing furnace is spheroidizing
Stove.
Seamless pipe hot extrusion technique the most according to claim 3, it is characterised in that described electroplating technique is: will locate in advance
Material after reason is put into as negative electrode in dithia cycle compound cyanogen-free silver-plating solution, is 2.7A/ in cathode-current density
dm2, temperature is electroplated 12 minutes under conditions of being 32 DEG C, is taken out by material after plating, successively through adverse current washing, goes out light, counter-flow water
Wash, passivation, adverse current washing, close, cold drying,.
Seamless pipe hot extrusion technique the most according to claim 4, it is characterised in that described protection oil uses tween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610620494.2A CN106111728A (en) | 2016-07-29 | 2016-07-29 | A kind of seamless pipe hot extrusion technique |
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|---|---|---|---|
| CN201610620494.2A CN106111728A (en) | 2016-07-29 | 2016-07-29 | A kind of seamless pipe hot extrusion technique |
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| CN106111728A true CN106111728A (en) | 2016-11-16 |
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| CN201610620494.2A Pending CN106111728A (en) | 2016-07-29 | 2016-07-29 | A kind of seamless pipe hot extrusion technique |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110605362A (en) * | 2019-08-23 | 2019-12-24 | 徐州东坤耐磨材料有限公司 | Preparation method of high-strength water pump diversion shell |
| TWI719750B (en) * | 2019-12-10 | 2021-02-21 | 金允成企業股份有限公司 | Forging and forming method of aluminum alloy pipe fittings |
Citations (5)
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|---|---|---|---|---|
| JP2007015000A (en) * | 2005-07-08 | 2007-01-25 | Nisshin Steel Co Ltd | Method for manufacturing high-strength electric resistance welded steel tube |
| JP2013234360A (en) * | 2012-05-09 | 2013-11-21 | Nippon Steel & Sumitomo Metal Corp | Method for producing galvanized heat-treated steel pipe |
| CN103831312A (en) * | 2014-03-24 | 2014-06-04 | 山东建筑大学 | Warm extrusion forming method for efficiently processing 20 CrNiMo straight tooth racks |
| CN103934642A (en) * | 2014-04-29 | 2014-07-23 | 华创融盛展示(北京)有限公司 | Steel cold-extrusion process |
| CN105135204A (en) * | 2015-08-04 | 2015-12-09 | 安徽科蓝特铝业有限公司 | High-stability aluminum alloy section and manufacturing process thereof |
-
2016
- 2016-07-29 CN CN201610620494.2A patent/CN106111728A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007015000A (en) * | 2005-07-08 | 2007-01-25 | Nisshin Steel Co Ltd | Method for manufacturing high-strength electric resistance welded steel tube |
| JP2013234360A (en) * | 2012-05-09 | 2013-11-21 | Nippon Steel & Sumitomo Metal Corp | Method for producing galvanized heat-treated steel pipe |
| CN103831312A (en) * | 2014-03-24 | 2014-06-04 | 山东建筑大学 | Warm extrusion forming method for efficiently processing 20 CrNiMo straight tooth racks |
| CN103934642A (en) * | 2014-04-29 | 2014-07-23 | 华创融盛展示(北京)有限公司 | Steel cold-extrusion process |
| CN105135204A (en) * | 2015-08-04 | 2015-12-09 | 安徽科蓝特铝业有限公司 | High-stability aluminum alloy section and manufacturing process thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110605362A (en) * | 2019-08-23 | 2019-12-24 | 徐州东坤耐磨材料有限公司 | Preparation method of high-strength water pump diversion shell |
| TWI719750B (en) * | 2019-12-10 | 2021-02-21 | 金允成企業股份有限公司 | Forging and forming method of aluminum alloy pipe fittings |
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Application publication date: 20161116 |
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