US2854716A - Method of adding lead to steel - Google Patents

Method of adding lead to steel Download PDF

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Publication number
US2854716A
US2854716A US499802A US49980255A US2854716A US 2854716 A US2854716 A US 2854716A US 499802 A US499802 A US 499802A US 49980255 A US49980255 A US 49980255A US 2854716 A US2854716 A US 2854716A
Authority
US
United States
Prior art keywords
lead
steel
mold
runner
pool
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
US499802A
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English (en)
Inventor
Charles R Funk
Richard M Barnhart
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.)
Alco Products Inc
Original Assignee
Alco Products Inc
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
Priority to IT593382D priority Critical patent/IT593382A/it
Priority to CA583018A priority patent/CA583018A/en
Application filed by Alco Products Inc filed Critical Alco Products Inc
Priority to US499802A priority patent/US2854716A/en
Priority to FR1201294D priority patent/FR1201294A/fr
Application granted granted Critical
Publication of US2854716A publication Critical patent/US2854716A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • C21C7/0006—Adding metallic additives
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur

Definitions

  • This invention relates to a method of adding lead to steel.
  • Blooms or billets made from top-poured ingots have been satisfactory for small sections or for medium or commercial quality products such as use only free cutting, free machining, or screw stock but are unsatisfactory for high quality applications or for heavy sections such as are provided for the fabrication of large pinions, gear rings, or sections used in high pressure vessels.
  • Still another objectionable feature of top pouring practice is that large amounts of fumes containing toxic lead oxide are generated, the elimination of which requires elaborate and expensive venting equipment.
  • the pipe end is directed so that the lead drops down the runner passage into the pool where effective mixing takes place.
  • the molten steel in the pool is in a turbulent condition and adapted to cause thorough mixing.
  • the steel and lead thus mixed, it should be observed, enters the molds in an upwardly direction and moves outwardly toward the mold wall from its point of entry into the mold. This upward and outward action is opposite to the action which occurs during the normal gravity settling to top pouring practice and is highly desirable in aiding more thorough dispersion of the already distributed lead.
  • the relatively heavier lead is thus mixed not only in the pool of steel at' the bottom of the center runner but also in the sprues and in the molds.
  • the flow pattern is opposite to the flow pattern in current methods wherein top pouring is practiced.
  • the method of the invention is adapted to employ certain lead compounds or lead alloys which can be added "ice runner .in communication with the entry means .in the mold, pouring molten steel into said runner at a rate sufiicient to form a pool of molten steel in the bottom of the runner, pouring lead into the center runner so that it drops into the molten steel pool, continuing to pour the molten steel into the runner to replenish the pool and contemporaneously continuing to pour lead into the pool until the mold is filled to a desired extent, and permitting the mixture to solidify in the mold.
  • a method of mixing lead with steel so that the lead will be retained in the steel in a dispersed condition which comprises providing a mold having means in its bottom portion to permit the entry of molten material to fill the mold upwardly, providing a substantially vertical comprises providing a mold having an opening in its bottom portion ;to permit the flow of molten material into the mold in an upward direction, providing a substantially vertical runner and a lateral sprue to establish communication between said runner and the mold opening, pouring molten steel into the center runner at a rate sufiicient to form a pool at the bottom of said runner While said runner is supplying the sprue with molten steel, pouring lead into the center runner so that it drops into the pool of molten steel, continuing to pour molten steel into the runner to replenish the pool and contemporaneously continuing to pour lead into the pool until the mold is filled to a desired extent, and permitting the mixture to solidify in the mold.
  • a method of mixing lead with steel so that the lead will be retained 'in the steel in a dispersed condition which comprises providing a plurality of molds each having .an entrance opening in its bottom portion to permit the flow of molten material into the mold in an upward direction, providing a substantially vertical runner having lateral sprues establishing communication between the vertical runner and the mold entrance openings, pouring molten steel into the center runner at a rate sufiicient to .form a turbulent pool at the bottom of said runner while said runner is supplying the sprues with molten steel, pouring lead into the center runner so that it drops into the turbulent pool of molten steel to be mixed therewith, continuing to pour molten steel into the runner to replenish the pool, contemporaneously continuing to pour lead into the pool until the mold is filled to a desired extent, and permitting the mixture to solidify in the mold.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
US499802A 1955-04-07 1955-04-07 Method of adding lead to steel Expired - Lifetime US2854716A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
IT593382D IT593382A (enrdf_load_stackoverflow) 1955-04-07
CA583018A CA583018A (en) 1955-04-07 Method of adding lead to steel
US499802A US2854716A (en) 1955-04-07 1955-04-07 Method of adding lead to steel
FR1201294D FR1201294A (fr) 1955-04-07 1958-08-13 Procédé d'addition de plomb à l'acier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US499802A US2854716A (en) 1955-04-07 1955-04-07 Method of adding lead to steel

Publications (1)

Publication Number Publication Date
US2854716A true US2854716A (en) 1958-10-07

Family

ID=23986793

Family Applications (1)

Application Number Title Priority Date Filing Date
US499802A Expired - Lifetime US2854716A (en) 1955-04-07 1955-04-07 Method of adding lead to steel

Country Status (4)

Country Link
US (1) US2854716A (enrdf_load_stackoverflow)
CA (1) CA583018A (enrdf_load_stackoverflow)
FR (1) FR1201294A (enrdf_load_stackoverflow)
IT (1) IT593382A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2947622A (en) * 1958-06-23 1960-08-02 Inland Steel Co Method of making lead-containing steels
US3836359A (en) * 1972-06-19 1974-09-17 Republic Steel Corp Method of producing leaded steel
US3871870A (en) * 1973-05-01 1975-03-18 Nippon Kokan Kk Method of adding rare earth metals or their alloys into liquid steel
US3991808A (en) * 1974-07-15 1976-11-16 Caterpillar Tractor Co. Method and apparatus for the introduction of additives into a casting mold
US3991810A (en) * 1974-07-15 1976-11-16 Caterpillar Tractor Co. Method and apparatus for introducing additives into a casting mold
EP0267609A1 (en) * 1986-11-14 1988-05-18 Inland Steel Company Production of steels containing low melting point metals
US4848755A (en) * 1988-03-18 1989-07-18 Inland Steel Company Apparatus for adding liquid alloying ingredient to molten steel
US4849167A (en) * 1988-03-18 1989-07-18 Inland Steel Company Method and appartus for adding liquid alloying ingredient to molten steel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3166805A (en) * 1963-01-15 1965-01-26 Colorado Fuel & Iron Corp Leaded steel fume control

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1814584A (en) * 1930-02-27 1931-07-14 Otis Steel Company Method for purifying steel
US2215734A (en) * 1938-10-28 1940-09-24 Inland Steel Co Austenitic steel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1814584A (en) * 1930-02-27 1931-07-14 Otis Steel Company Method for purifying steel
US2215734A (en) * 1938-10-28 1940-09-24 Inland Steel Co Austenitic steel

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2947622A (en) * 1958-06-23 1960-08-02 Inland Steel Co Method of making lead-containing steels
US3836359A (en) * 1972-06-19 1974-09-17 Republic Steel Corp Method of producing leaded steel
US3871870A (en) * 1973-05-01 1975-03-18 Nippon Kokan Kk Method of adding rare earth metals or their alloys into liquid steel
US3991808A (en) * 1974-07-15 1976-11-16 Caterpillar Tractor Co. Method and apparatus for the introduction of additives into a casting mold
US3991810A (en) * 1974-07-15 1976-11-16 Caterpillar Tractor Co. Method and apparatus for introducing additives into a casting mold
EP0267609A1 (en) * 1986-11-14 1988-05-18 Inland Steel Company Production of steels containing low melting point metals
US4848755A (en) * 1988-03-18 1989-07-18 Inland Steel Company Apparatus for adding liquid alloying ingredient to molten steel
US4849167A (en) * 1988-03-18 1989-07-18 Inland Steel Company Method and appartus for adding liquid alloying ingredient to molten steel

Also Published As

Publication number Publication date
CA583018A (en) 1959-09-08
FR1201294A (fr) 1959-12-29
IT593382A (enrdf_load_stackoverflow)

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