WO2001042517A1 - Method for producing injection wire - Google Patents
Method for producing injection wire Download PDFInfo
- Publication number
- WO2001042517A1 WO2001042517A1 PCT/EP2000/004631 EP0004631W WO0142517A1 WO 2001042517 A1 WO2001042517 A1 WO 2001042517A1 EP 0004631 W EP0004631 W EP 0004631W WO 0142517 A1 WO0142517 A1 WO 0142517A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressing
- pressed
- wire
- press
- calcium
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/12—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of wires
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F2003/145—Both compacting and sintering simultaneously by warm compacting, below debindering temperature
Definitions
- the invention relates to a method for the production of injection wire, wherein calcium is supplied as a pressing material to a first pressing device, the pressing material being pressed in a first pressing process to produce a pressing strand, the pressing strand being cut into a plurality of pressing blanks as required, at least one pressing blank is fed to a second pressing device and wherein the pressing blank is pressed in a second pressing process to produce a wire.
- calcium for the treatment of metallurgical melts is also known, as is the supply of calcium to the melt in the form of an injection wire.
- the injection wire In order for the injection wire to be fed to a melt, it must have certain strength properties.
- Another essential requirement for calcium injection wire is that the wire contains only a very small amount of calcium oxides. Calcium oxides not only adversely affect the injection wire as such, but can also adversely affect the metallurgical properties of the melt.
- Another requirement for calcium injection wire is that it must be inexpensive. To ensure this, a simple and inexpensive manufacturing process is required.
- a two-stage production process for calcium injection wire of the type mentioned at the outset is already known from RU 2 011 685 Cl.
- the calcium has a temperature between 0.2 to 0.45 of the melting temperature of the calcium during the first pressing process due to the selected process conditions. At a melting temperature of 851 ° C, this corresponds to a temperature range between 170.2 and 382.9 ° C.
- the calcium pressed blank has a temperature between 0.20 and 0.35 of the melting temperature of the calcium, ie one Temperature in the range between 170.2 and 297.8 ° C.
- a disadvantage of the known method is that the wire produced according to it leaves something to be desired both in terms of its strength properties and in terms of its metallurgical properties.
- the object of the present invention is therefore to provide a method of the type mentioned at the outset with which a calcium injection wire can be produced in a simple and inexpensive manner and which has the same strength as in terms of its metallurgical properties in metallurgy requirements.
- the material to be pressed is heated to a temperature of less than 150 ° C., preferably in the range of approximately 100 ° C., before the first pressing operation and / or that the pressing blank is brought to a temperature of less before the second pressing operation than 170 ° C, preferably in the range of about 150 ° C.
- the material to be pressed is pressed in the first pressing device in such a way that the pressing strand emerging from the first pressing device has a temperature of less than 170 ° C., preferably in the range of approximately 150 ° C.
- the aforementioned temperature means the temperature that the press strand has immediately when it exits the press device. This temperature results from the sum of the previously heated inlet temperature of the material to be pressed when it is inserted into the respective pressing device, the working temperature of the pressing device and the temperature which results from the deformation of the calcium during pressing.
- the material to be pressed is subjected to a mechanical surface treatment before the first pressing operation in order to remove calcium oxides from the surface of the material to be pressed.
- Calcium injection wire leads in the sense of the solution of the above-mentioned tasks. However, it is particularly advantageous if at least two and in particular all alternatives are used simultaneously in the manufacture of calcium injection wire.
- This calcium oxide has a very strong influence on the pressing process, since it settles during pressing in the area of the die of the pressing device and the flow of the metal during pressing is uneven and thus impeded.
- the proportion of oxides in the pressed wire is unevenly distributed.
- the proportion of oxides at the end of the pressed wire is greater than at the beginning of the pressed wire.
- the starting point of the invention is now the reduction in the proportion of calcium oxides before and during manufacture and thus also in the wire produced.
- This is taken into account according to the invention in two alternatives by reducing the process conditions with regard to the temperatures before pressing and during pressing. It has been found that preheating the material to be pressed or the press blank before pressing in the specified, comparatively low temperature range leads to a very thin calcium oxide layer. This calcium oxide layer only insignificantly hinders the respective pressing process. Due to the preheating in the specified temperature range, a lower working temperature can be used during the pressing, so that the calcium oxide layer that forms during pressing is comparatively thin and only insignificantly affects the pressed blank and in particular also the pressed wire with regard to the desired properties.
- the proportion of calcium oxides can also be considerably reduced by mechanically surface-treating the material to be pressed before the first pressing operation, in order to thereby remove the calcium oxide layer from the surface of the calcium.
- This surface treatment which precedes the first pressing, enables the first pressing device to be supplied with almost pure calcium.
- the wire according to the invention not only has a higher activity, i. H. showed a higher reactivity of the calcium, but also increased strength properties, which is important when winding and feeding the wire to the melt.
- the pressing blank is advantageously pressed in the second pressing device in such a way that the wire emerging from the second pressing device has a temperature of approximately 210 ° C. immediately upon exit. This not only results in a reduction in the formation of calcium oxides on the surface of the pressed wire, but also in that the pressing process of the wire can be carried out in a controlled manner and the wire can be removed and coiled in a controlled manner after pressing.
- the block form of the distilled calcium here means an essentially cylindrical body which, owing to the production process, has a funnel at one end.
- the calcium used in block form has two main advantages. On the one hand, the calcium used in block form has a comparatively small surface area, so that the calcium oxide layer possible on the block is comparatively small in relation to the total volume of the block. In contrast, when using calcium granules, the proportion of oxides is considerably larger due to the larger surface area. In addition, in particular when using the above-mentioned temperatures after pressing, a wire is obtained whose specific weight per unit length is considerably greater than that of wire made from granulate.
- a press strand with a not inconsiderable length results.
- the press strand is divided into a number of shorter pieces or press blanks after the first pressing operation. It goes without saying that the cutting can also be omitted if the press strand has a length that can still be handled for the second pressing process.
- the cut press blanks are at least partially stored after the first pressing process before the second pressing process is carried out.
- the intermediate storage is carried out in vacuo or under inert gas, so that oxidation of the calcium can be ruled out.
- the wire produced according to the invention can be used directly as an injection wire, that is to say as a so-called calcium solid wire, or else as Inner wire of a covered injection wire.
- a steel or aluminum jacket is suitable for the jacket, for example.
- the pressed wire is first wound up after the second pressing process and sheathed only after the reeling. It has proven to be advantageous not to carry out the sheathing immediately after the pressing, since in this case the pressing speed would have to be coordinated with the speed during the sheathing, which can have a disadvantageous effect on the pressing process.
- the pressed material A is a single cylindrical block. Due to the manufacturing process, the pressed material has a spongy, porous structure, which is referred to as dendrite-like.
- the pressed material A is subjected to a mechanical surface treatment at the beginning of the process by means of a surface treatment device a, not shown in detail, as is indicated in the drawing in stage 1. In this mechanical surface treatment, the calcium oxides located on the outer surface of the material A to be pressed or the calcium oxide layer located thereon are at least substantially removed.
- the pressed material A is heated in a furnace b, the working temperature of which is approximately 450 ° C. to 500 ° C. in the stage 2, for a short time until a temperature Ti of the pressed material A of preferably approximately 100 ° C. results .
- the preheating stage 2 is followed by the first pressing process 3 or the first pressing stage 3 in the first pressing device c after the material A to be pressed has been fed to the first pressing device c from the oven b.
- the pressed material A is pressed during rend the first pressing operation 3 at such a speed or at such a pressure that the extruding strand B emerging from the first pressing device c exits from the first pressing device c at a temperature T 2 of approximately 150 ° C.
- the pressing die of the first pressing device c being designed as a single-channel pressing die, a press strand B of comparatively large length results. Since the press strand B with the aforementioned length is not suitable for the direct processing of wire, it is cut in step 4 by a cutting device d into pieces of shorter length, so that a plurality of press blanks C results.
- the press blanks C are temporarily stored in stage 5 in a store e before this material is further processed in the second pressing process 7.
- the intermediate storage takes place in a vacuum or under inert gas.
- stage 6 the press blanks C are fed individually to an oven f and heated to the temperature T 3 of approximately 150 ° C. Then the press blank C is fed to a second press device g, in which the second press operation 7 is carried out.
- the press blank C is art in the second press device g that the wire D emerging from the second press device g has a temperature of approximately 210 ° C immediately upon exit.
- the press die is designed as a single-channel press die.
- the pressing of the material to be pressed results in a reduction in cross-section from the material to be pressed and thus a coefficient of deformation greater than or equal to 6, the pressed blank is pressed with a coefficient of change in the range between 130 to 200.
- the pressed wire D is coiled in stage 8 via a coiler h.
- the coiled wire D can then be used directly as an injection wire if the use of solid calcium wire is desired. If, on the other hand, the use of a sheathed injection wire is desired, the coiled wire is sheathed in step 9 by a corresponding sheathing device i.
- the wire D is unwound again and coated with an appropriate sheathing, for example made of aluminum or steel.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10083732T DE10083732B4 (en) | 1999-12-06 | 2000-05-22 | Process for producing injection wire |
AU50699/00A AU5069900A (en) | 1999-12-06 | 2000-05-22 | Method for producing injection wire |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU99125169 | 1999-12-06 | ||
RU99125169A RU2152834C1 (en) | 1999-12-06 | 1999-12-06 | Method for making calcium wire |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001042517A1 true WO2001042517A1 (en) | 2001-06-14 |
Family
ID=20227538
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/004631 WO2001042517A1 (en) | 1999-12-06 | 2000-05-22 | Method for producing injection wire |
Country Status (4)
Country | Link |
---|---|
AU (1) | AU5069900A (en) |
DE (1) | DE10083732B4 (en) |
RU (1) | RU2152834C1 (en) |
WO (1) | WO2001042517A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100351400C (en) * | 2005-04-22 | 2007-11-28 | 盛富春 | High-absorbility magnesium-feeding line desulfurizing method and its special apparatus |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2527547C2 (en) * | 2012-12-18 | 2014-09-10 | Открытое акционерное общество "Чепецкий механический завод" | Production of unrestrictedly long bar from distilled calcium |
RU169359U1 (en) * | 2015-12-14 | 2017-03-15 | Александр Алексеевич Неретин | Combined Injection Wire |
RU2677812C2 (en) * | 2016-04-04 | 2019-01-21 | Акционерное Общество "Чепецкий Механический Завод" (Ао Чмз) | Wire for treatment of metallurgical melts |
RU184357U9 (en) * | 2017-08-11 | 2021-10-08 | Арам Михайлович Караханянц | Injection wire for the processing of metallurgical melts |
RU2693276C1 (en) * | 2018-03-30 | 2019-07-02 | Акционерное общество "Чепецкий механический завод" | Wire for bucket treatment of steel |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0137618A2 (en) * | 1983-08-12 | 1985-04-17 | Pfizer Inc. | Process and apparatus for adding calcium to a bath of molten ferrous material |
US4512800A (en) * | 1983-08-12 | 1985-04-23 | Pfizer Inc. | Wire injection apparatus |
EP0190089A1 (en) * | 1985-01-24 | 1986-08-06 | Vallourec | Process for treating liquid metals by a calcium-containing cored wire |
RU2011685C1 (en) * | 1993-02-09 | 1994-04-30 | Александр Алексеевич Неретин | Method of producing refining calcium additive wire |
RU2055906C1 (en) * | 1993-04-27 | 1996-03-10 | Институт новой металлургической технологии | Tube wire for treating cast iron |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4235007A (en) * | 1975-07-25 | 1980-11-25 | Hitachi Cable, Ltd. | Method of production of a wire-shaped composite addition material |
-
1999
- 1999-12-06 RU RU99125169A patent/RU2152834C1/en not_active IP Right Cessation
-
2000
- 2000-05-22 AU AU50699/00A patent/AU5069900A/en not_active Abandoned
- 2000-05-22 DE DE10083732T patent/DE10083732B4/en not_active Expired - Fee Related
- 2000-05-22 WO PCT/EP2000/004631 patent/WO2001042517A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0137618A2 (en) * | 1983-08-12 | 1985-04-17 | Pfizer Inc. | Process and apparatus for adding calcium to a bath of molten ferrous material |
US4512800A (en) * | 1983-08-12 | 1985-04-23 | Pfizer Inc. | Wire injection apparatus |
EP0190089A1 (en) * | 1985-01-24 | 1986-08-06 | Vallourec | Process for treating liquid metals by a calcium-containing cored wire |
RU2011685C1 (en) * | 1993-02-09 | 1994-04-30 | Александр Алексеевич Неретин | Method of producing refining calcium additive wire |
RU2055906C1 (en) * | 1993-04-27 | 1996-03-10 | Институт новой металлургической технологии | Tube wire for treating cast iron |
Non-Patent Citations (2)
Title |
---|
DATABASE WPI Section Ch Week 199504, Derwent World Patents Index; Class M21, AN 1995-029224, XP002146873 * |
DATABASE WPI Section Ch Week 199649, Derwent World Patents Index; Class M24, AN 1996-496161, XP002146874 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100351400C (en) * | 2005-04-22 | 2007-11-28 | 盛富春 | High-absorbility magnesium-feeding line desulfurizing method and its special apparatus |
Also Published As
Publication number | Publication date |
---|---|
RU2152834C1 (en) | 2000-07-20 |
AU5069900A (en) | 2001-06-18 |
DE10083732B4 (en) | 2006-12-14 |
DE10083732D2 (en) | 2004-04-15 |
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