EP1423219A1 - Verfahren zur herstellung eines ultrahochzugfesten streckmetalls aus stahl - Google Patents
Verfahren zur herstellung eines ultrahochzugfesten streckmetalls aus stahlInfo
- Publication number
- EP1423219A1 EP1423219A1 EP02765741A EP02765741A EP1423219A1 EP 1423219 A1 EP1423219 A1 EP 1423219A1 EP 02765741 A EP02765741 A EP 02765741A EP 02765741 A EP02765741 A EP 02765741A EP 1423219 A1 EP1423219 A1 EP 1423219A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- work piece
- yield point
- temperature
- forming operation
- manufacturing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
- B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/10—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
Definitions
- the present invention relates to a method for manufacturing an ultra-high-tensile expanded metal of steel.
- an expanded metal When manufacturing an expanded metal one usually starts from metallic work pieces, preferably of soft steel with good forming properties. During the forming operation one achieves a certain degree of deformation hardening, which however is insufficient for obtaining an ultra-high-tensile final product. In case one should start from a material that initially is ultra-high- tensile with a yield point preferably more than 700 MPa, this material would not have sufficient ductility to be formed to expanded metal. This is so because the material would break during the forming operation.
- the object of the present invention is to provide a method for manufacturing an ultra-high-tensile expanded metal, which is constituted of iron that has been alloyed to give a strong deformation hardening when being subjected to plastic cold machining in combination with maintaining good ductility of the alloy at the same time as the final product achieves a yield point more than 700 MPa.
- the expanded metal manufactured according to the invention is constituted of a work piece of iron, which has been alloyed with chromium, nickel and carbon in predetermined proportions.
- the iron is alloyed with 17% Cr, 7% Ni and 0,1% C or alloys closely related to these and that the temperature of the work piece before and/or during the manufacturing operation has achieved or is kept at a controlled level, wherein a strong but controlled deformation hardening is achieved when plastic cold working the work piece in combination with maintaining a good ductility of the alloy.
- the temperature of the finally formed expanded metal is controlled after the working operation.
- the alloyed metal work piece that forms the initial work piece is formed in traditional machines for expanded metal fabrication to increase its yield point from an original, low yield point of about 300 MPa to a final product that completely or partially obtains a yield point of more than 700 MPa.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Forging (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0102943 | 2001-09-05 | ||
SE0102943A SE522746C2 (sv) | 2001-09-05 | 2001-09-05 | Förfarande för tillverkning av en ultrahöghållfast sträckmetall av stål |
PCT/SE2002/001577 WO2003020456A1 (en) | 2001-09-05 | 2002-09-04 | A method for manufacturing an ultra-high-tensile, expanded metal of steel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1423219A1 true EP1423219A1 (de) | 2004-06-02 |
EP1423219B1 EP1423219B1 (de) | 2008-10-08 |
Family
ID=20285232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02765741A Expired - Lifetime EP1423219B1 (de) | 2001-09-05 | 2002-09-04 | Verfahren zur herstellung eines ultrahochzugfesten streckmetalls aus stahl |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1423219B1 (de) |
AT (1) | ATE410250T1 (de) |
DE (1) | DE60229272D1 (de) |
ES (1) | ES2314095T3 (de) |
SE (1) | SE522746C2 (de) |
WO (1) | WO2003020456A1 (de) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2018085A (en) * | 1934-05-29 | 1935-10-22 | Allegheny Steel Co | Method of making flat expanded grilles |
US4649607A (en) * | 1985-06-28 | 1987-03-17 | Fmc Corporation | Apparatus for making expanded metal |
-
2001
- 2001-09-05 SE SE0102943A patent/SE522746C2/sv not_active IP Right Cessation
-
2002
- 2002-09-04 DE DE60229272T patent/DE60229272D1/de not_active Expired - Lifetime
- 2002-09-04 AT AT02765741T patent/ATE410250T1/de not_active IP Right Cessation
- 2002-09-04 EP EP02765741A patent/EP1423219B1/de not_active Expired - Lifetime
- 2002-09-04 ES ES02765741T patent/ES2314095T3/es not_active Expired - Lifetime
- 2002-09-04 WO PCT/SE2002/001577 patent/WO2003020456A1/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO03020456A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2003020456A1 (en) | 2003-03-13 |
ATE410250T1 (de) | 2008-10-15 |
DE60229272D1 (de) | 2008-11-20 |
SE0102943D0 (sv) | 2001-09-05 |
SE522746C2 (sv) | 2004-03-02 |
ES2314095T3 (es) | 2009-03-16 |
EP1423219B1 (de) | 2008-10-08 |
SE0102943L (sv) | 2003-03-06 |
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