ES2026823A6 - Bell oven - Google Patents
Bell ovenInfo
- Publication number
- ES2026823A6 ES2026823A6 ES9100765A ES9100765A ES2026823A6 ES 2026823 A6 ES2026823 A6 ES 2026823A6 ES 9100765 A ES9100765 A ES 9100765A ES 9100765 A ES9100765 A ES 9100765A ES 2026823 A6 ES2026823 A6 ES 2026823A6
- Authority
- ES
- Spain
- Prior art keywords
- nitrogen
- content
- atmosphere
- helium
- gas
- 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.)
- Expired - Lifetime
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 7
- 229910052757 nitrogen Inorganic materials 0.000 abstract 4
- 239000007789 gas Substances 0.000 abstract 3
- 239000001307 helium Substances 0.000 abstract 3
- 229910052734 helium Inorganic materials 0.000 abstract 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 abstract 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000010926 purge Methods 0.000 abstract 1
- 238000006467 substitution reaction Methods 0.000 abstract 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B11/00—Bell-type furnaces
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/663—Bell-type furnaces
- C21D9/667—Multi-station furnaces
- C21D9/67—Multi-station furnaces adapted for treating the charge in vacuum or special atmosphere
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
Process for the heat treatment of metal articles under a protective atmosphere in an oven operating noncontinuously, of the kind in which, in an initial stage of temperature rise an injection of a flow rate of purging gas with a substantial nitrogen content is ensured, while the cooling stage is performed under an atmosphere with a predominant content of gas with better thermal conductivity than nitrogen, characterised in that a substitution of the nitrogen-based atmosphere by a helium-based atmosphere is caused and this is done as soon as the temperature increase has been substantially accomplished. The gas with a substantial helium content is a mixture of helium and hydrogen with a content of less than 10 %. Application to conventional bell ovens employing nitrogen, on condition of a simple improvement to the leakproofing seals.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9004306A FR2660744B1 (en) | 1990-04-04 | 1990-04-04 | BELL OVEN. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2026823A6 true ES2026823A6 (en) | 1992-05-01 |
Family
ID=9395438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES9100765A Expired - Lifetime ES2026823A6 (en) | 1990-04-04 | 1991-03-25 | Bell oven |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPH05263126A (en) |
| BE (1) | BE1006163A4 (en) |
| CA (1) | CA2039385A1 (en) |
| ES (1) | ES2026823A6 (en) |
| FR (1) | FR2660744B1 (en) |
| IT (1) | IT1244783B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4129879A1 (en) * | 1991-09-09 | 1993-03-11 | Loi Ind Ofenanlagen | METHOD FOR REPLACING THE ATMOSPHERES OF AN INDUSTRIAL STOVE |
| DE102004058464A1 (en) * | 2004-12-03 | 2006-06-22 | Linde Ag | Process for gas quenching |
| EP2304061A1 (en) | 2008-06-13 | 2011-04-06 | LOI Thermprocess GmbH | Process for the high-temperature annealing of grain-oriented magnetic steel strip in an inert gas atmosphere in a heat treatment furnace |
| CN101812584B (en) * | 2010-05-06 | 2012-03-21 | 山西太钢不锈钢股份有限公司 | Method for blowing hydrogen in cover annealing |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2450081A (en) * | 1945-04-05 | 1948-09-28 | George R Burkhardt | Noble gas metallurgy |
| GB1233847A (en) * | 1968-06-28 | 1971-06-03 | ||
| AT395321B (en) * | 1983-07-05 | 1992-11-25 | Ebner Ind Ofenbau | METHOD FOR COOLING CHARGES IN DISCONTINUOUSLY WORKING INDUSTRIAL OVENS, ESPECIALLY STEEL WIRE OR TAPE BANDS IN DOME GLUES |
| DE3736501C1 (en) * | 1987-10-28 | 1988-06-09 | Degussa | Process for the heat treatment of metallic workpieces |
-
1990
- 1990-04-04 FR FR9004306A patent/FR2660744B1/en not_active Expired - Fee Related
-
1991
- 1991-03-14 IT ITMI910683A patent/IT1244783B/en active IP Right Grant
- 1991-03-22 JP JP3058783A patent/JPH05263126A/en active Pending
- 1991-03-25 ES ES9100765A patent/ES2026823A6/en not_active Expired - Lifetime
- 1991-03-28 CA CA002039385A patent/CA2039385A1/en not_active Abandoned
- 1991-04-02 BE BE9100299A patent/BE1006163A4/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| IT1244783B (en) | 1994-08-08 |
| FR2660744B1 (en) | 1994-03-11 |
| ITMI910683A1 (en) | 1992-09-14 |
| BE1006163A4 (en) | 1994-05-31 |
| FR2660744A1 (en) | 1991-10-11 |
| CA2039385A1 (en) | 1991-10-05 |
| ITMI910683A0 (en) | 1991-03-14 |
| JPH05263126A (en) | 1993-10-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FD1A | Patent lapsed |
Effective date: 20000201 |