US3436276A - Slag removal method during thermochemical scarfing - Google Patents
Slag removal method during thermochemical scarfing Download PDFInfo
- Publication number
- US3436276A US3436276A US551367A US3436276DA US3436276A US 3436276 A US3436276 A US 3436276A US 551367 A US551367 A US 551367A US 3436276D A US3436276D A US 3436276DA US 3436276 A US3436276 A US 3436276A
- Authority
- US
- United States
- Prior art keywords
- slag
- reaction
- scarfing
- thermochemical
- produced
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K7/00—Cutting, scarfing, or desurfacing by applying flames
- B23K7/06—Machines, apparatus, or equipment specially designed for scarfing or desurfacing
Definitions
- This invention relates to a method for scarling the surface of a metal body, and more particularly to improvements on a method of trapping and disposing of the molten slag produced upon the surface of the metal body during the thermochemical reaction, by the use of a fluid stream which is discharged so as to skim across the surface of the body at high velocity.
- thermochemical scarfing process a stream of oxidizing gas is directed obliquely against a reaction zone of molten metal which has previously been formed upon the surface of the body.
- a molten slag is produced which must be removed from the surface of the Ibody. This is accomplished accord-ing to Thompson et al. by directing a stream of fluid, e.g.
- the liuid stream also breaks the slag into small particles, chills them, and carries them from the body surface into a slag chute.
- a deflector surface is positioned across the path of relative movement of the body to be scarfed, at a point adjacent the reaction zone, and in the path of the slag produced.
- a fluid stream e.g. water, is then flowed upon the surface of the .ice
- the deflector in order to maintain it wetted.
- the effect of the wetted deflector surface is remarkable in that the particles of flying slag which strike the surface do not stick to it. Instead they are immediately solited and washed over the dellector surface into a slag chute. Moreover, the surface prevents the slag particles from penetrating through the fluid stream and escaping into the work area. While the deector may be dat, when scarling relatively wide metal bodies it is preferable to have it curve shaped, with the cavity thereof facing the reaction zone.
- FIGURE 1 is an isometric elevational view of a metal body being scarfed, illustrating a preferred embodiment of the invention, utilizing a wetted curve shaped dellector and
- FIGURE 2 is an isometric elevational view similar to FIGURE 1, but illustrating another embodiment of the invention, utilizing a flat dellector surface.
- the metal body to be scarfed is supported upon and moved by roll table R toward a scarling unit M.
- a molten puddle of metal is formed upon the surface of the body at reaction zone Z, by preheat iiames from the scarling unit M.
- a sheet-like stream of oxidizing gas S e.g. oxygen
- Relative movement is then rected obliquely against the molten puddle to cause a thermochemical reaction.
- Relative movement is then produced between the metal body W and the oxidizing gas stream S so as to continue the reaction longitudinally along the surface of the body.
- molten slag is produced and projected forwardly and upwardly from the reaction zone Z, as shown generally by the arrows.
- a surface 12 In order to trap and remove the slag which is produced, a surface 12 is positioned across the path of relative movement at a point adjacent the reatcion zone Z and in the path of the projected slag. A stream of fluid, e.g. water, is owed at high velocity over the surface 12 in order to maintain the same wetted continuously.
- a stream of fluid e.g. water
- the surface 12 backing up the uid stream acts as a shield to prevent a portion of the projected slag from penetrating through or becoming deflected by such stream.
- the surface 12 is preferably curved-shaped with the cavity therein facing the reaction zone Z. This congura- -tion is particularly effective when scarling relatively wide metal bodies, i.e. slabs, in that it forms a pocket to maintain the coherency of the lluid stream over the entire length of the surface.
- the diameter of the curve-shaped surface will usually be of -the order of 6 to 12 inches, over which a llow of about 700 to 1,000 gallons of fluid per minute is maintained during scarling.
- thermochemical scarfng process wherein an oxidizing ⁇ gas is directed from a scarfing unit against a reaction zone of molten metal on the surface of a metal body to produce a thermochemical reaction thereon, and relative movement is produced between such scaring unit and the body for continuing such reaction along the length of such surface
- the improvement in trapping and disposing of the molten slag produced during such reaction from the scarng area which comprises: positioning a deector surface across the path of relative movement at a point adjacent the reaction zone and in the path of the slag produced, and flowing a uid stream over 1 said surface to maintain the same wetted.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Arc Welding In General (AREA)
Description
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US55136766A | 1966-05-19 | 1966-05-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3436276A true US3436276A (en) | 1969-04-01 |
Family
ID=24200978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US551367A Expired - Lifetime US3436276A (en) | 1966-05-19 | 1966-05-19 | Slag removal method during thermochemical scarfing |
Country Status (5)
Country | Link |
---|---|
US (1) | US3436276A (en) |
AT (1) | AT275271B (en) |
BE (1) | BE698717A (en) |
GB (1) | GB1161716A (en) |
SE (1) | SE327612B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4120703A (en) * | 1975-08-29 | 1978-10-17 | Union Carbide Corporation | Method and apparatus for reducing smoke and preventing secondary fins during scarfing |
US4260433A (en) * | 1977-11-24 | 1981-04-07 | Centro-Maskin Goteborg Ab | Method of forming and collecting slag products formed at a melting process, especially at gas planing |
US4340163A (en) * | 1980-06-17 | 1982-07-20 | Romashov Alexandr A | Apparatus for removal of internal flash from electric-welded pipes |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2465297A (en) * | 1943-12-30 | 1949-03-22 | Linde Air Prod Co | Process and apparatus for disposing of metal desurfacing products |
US3163559A (en) * | 1957-11-12 | 1964-12-29 | Union Carbide Corp | Water jet method of deslagging a metal surface |
-
1966
- 1966-05-19 US US551367A patent/US3436276A/en not_active Expired - Lifetime
-
1967
- 1967-05-18 SE SE06984/67A patent/SE327612B/xx unknown
- 1967-05-18 GB GB23020/67A patent/GB1161716A/en not_active Expired
- 1967-05-18 AT AT466567A patent/AT275271B/en active
- 1967-05-19 BE BE698717D patent/BE698717A/xx unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2465297A (en) * | 1943-12-30 | 1949-03-22 | Linde Air Prod Co | Process and apparatus for disposing of metal desurfacing products |
US3163559A (en) * | 1957-11-12 | 1964-12-29 | Union Carbide Corp | Water jet method of deslagging a metal surface |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4120703A (en) * | 1975-08-29 | 1978-10-17 | Union Carbide Corporation | Method and apparatus for reducing smoke and preventing secondary fins during scarfing |
US4260433A (en) * | 1977-11-24 | 1981-04-07 | Centro-Maskin Goteborg Ab | Method of forming and collecting slag products formed at a melting process, especially at gas planing |
US4340163A (en) * | 1980-06-17 | 1982-07-20 | Romashov Alexandr A | Apparatus for removal of internal flash from electric-welded pipes |
Also Published As
Publication number | Publication date |
---|---|
BE698717A (en) | 1967-11-20 |
SE327612B (en) | 1970-08-24 |
GB1161716A (en) | 1969-08-20 |
AT275271B (en) | 1969-10-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: L-TEC COMPANY, NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:UNION CARBIDE CORPORATION;REEL/FRAME:004436/0460 Effective date: 19850712 Owner name: L-TEC COMPANY, 666 THIRD AVENUE, NEW YORK, NY 100 Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:UNION CARBIDE CORPORATION;REEL/FRAME:004436/0460 Effective date: 19850712 |
|
AS | Assignment |
Owner name: SECURITY PACIFIC BUSINESS CREDIT INC., A DE CORP. Free format text: SECURITY INTEREST;ASSIGNOR:L-TEC COMPANY A NY LIMITED PARTNERSHIP;REEL/FRAME:004445/0860 Effective date: 19850716 |
|
AS | Assignment |
Owner name: L-TEC COMPANY, SOUTH CAROLINA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:UNION CARBIDE CORPORATION, A CORP OF NY.;REEL/FRAME:004610/0384 Effective date: 19860828 Owner name: L-TEC COMPANY, EBENEEZER ROAD, POST OFFICE BOX F-6 Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:UNION CARBIDE CORPORATION, A CORP OF NY.;REEL/FRAME:004610/0384 Effective date: 19860828 |