US3436276A - Slag removal method during thermochemical scarfing - Google Patents

Slag removal method during thermochemical scarfing Download PDF

Info

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
Application number
US551367A
Other languages
English (en)
Inventor
Ivan P Thompson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
L-Tec Co
Original Assignee
Union Carbide Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Union Carbide Corp filed Critical Union Carbide Corp
Application granted granted Critical
Publication of US3436276A publication Critical patent/US3436276A/en
Assigned to L-TEC COMPANY reassignment L-TEC COMPANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: UNION CARBIDE CORPORATION
Assigned to SECURITY PACIFIC BUSINESS CREDIT INC., A DE CORP. reassignment SECURITY PACIFIC BUSINESS CREDIT INC., A DE CORP. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: L-TEC COMPANY A NY LIMITED PARTNERSHIP
Anticipated expiration legal-status Critical
Assigned to L-TEC COMPANY reassignment L-TEC COMPANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: UNION CARBIDE CORPORATION, A CORP OF NY.
Expired - Lifetime legal-status Critical Current

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)
  • Arc Welding In General (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US551367A 1966-05-19 1966-05-19 Slag removal method during thermochemical scarfing Expired - Lifetime US3436276A (en)

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 (2)
AT (1) AT275271B (2)
BE (1) BE698717A (2)
GB (1) GB1161716A (2)
SE (1) SE327612B (2)

Cited By (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
GB1161716A (en) 1969-08-20
SE327612B (2) 1970-08-24
AT275271B (de) 1969-10-27
BE698717A (2) 1967-11-20

Similar Documents

Publication Publication Date Title
US3428718A (en) Method for the liquid disintegration of metal
US3436276A (en) Slag removal method during thermochemical scarfing
US2465297A (en) Process and apparatus for disposing of metal desurfacing products
US3163559A (en) Water jet method of deslagging a metal surface
JPS5693809A (en) Slag-cut steel discharging process
JPH06503759A (ja) 特に、切断してスラブにする鋼ストリップのバリ取り方法及び装置
US2218141A (en) Apparatus for removing fumes and solids in metal skinning equipment
US3455747A (en) Thermochemical scarfing method and apparatus
US2168581A (en) Method and apparatus for thermochemically removing metal from bodies of ferrous metal
GB2160809A (en) Surface cooling of a workpiece weld zone
US3608879A (en) Device for trimming flash from metal which has been worked with a machining torch
JPS6438584A (en) Device for melting metal in vacuum chamber
US2538074A (en) Scarfing apparatus
US2317495A (en) Desurfacing apparatus and process
CA1103568A (en) Method and apparatus for reducing smoke and preventing secondary fins during scarfing
US3870571A (en) Method for surface treatment of intermediate products which are being flame scarfed
US3951012A (en) Process for making a file and article resulting therefrom
US3630509A (en) Treatment of molten material
US4120703A (en) Method and apparatus for reducing smoke and preventing secondary fins during scarfing
US3498848A (en) Method and apparatus for high-speed cutting with oxygen
GB1339436A (en) Method and means for manufacturing a powder by atomizing a molten material
US4115153A (en) Method at gas planing
JP2603837B2 (ja) プラズマ切断方法
KR810001067B1 (ko) 스카아핑(scarfing)도중 연기 발생량을 감소시키고 이차휜(二次 fins)형성을 방지시키는 방법.
JP2583263B2 (ja) 高放射性固体廃棄物切断装置

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