US1467542A - Method of producing pipe balls - Google Patents

Method of producing pipe balls Download PDF

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Publication number
US1467542A
US1467542A US566105A US56610522A US1467542A US 1467542 A US1467542 A US 1467542A US 566105 A US566105 A US 566105A US 56610522 A US56610522 A US 56610522A US 1467542 A US1467542 A US 1467542A
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US
United States
Prior art keywords
balls
producing pipe
ball
pipe balls
temperature
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Expired - Lifetime
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US566105A
Inventor
John H Hall
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Taylor Wharton Iron & Steel
TAYLOR-WHARTON IRON AND STEEL Co
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Taylor Wharton Iron & Steel
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Priority to US566105A priority Critical patent/US1467542A/en
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Classifications

    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching

Definitions

  • the object of this invention is to provide for the production of manganese steel pipe balls characterized by their uniformly fine grained structure and by their marked ability to resist the abrasive action of hot skelp.
  • the steel is poured at a temperature close to its freezing point whereby I obtain a casting having a uniformly fine grain structure, and which is further characterized by its freedom from columnar crystals.
  • the avoidance of columnar crystals eliminates burning of the 1922.
  • pipe balls which consists in casting balls from manganese steel poured at a temperature close to its freezing point, charging the balls into a hot furnace and rapidly elevating the temperature to about 1060 C. and then quenching the balls.
  • a pipe ball consisting of a cold-poured manganese steel casting free from columnar crystals and burnt spots.

Description

Patented Sept. 11, 1923.
JOHN H. HALL, OF HIGH BRIDGE, NEW JERSEY, ASSIGNDR TO TAYLOR-"WHE.RTOI\T IRON AND STEEL COMPANY, OF HIGH BRIDGE, NEW JERSEY, A CORPORATION OF NEW JERSEY.
METHOD OF PRODUCING PIPE BALLS.
N Drawing. Application filed June 5,
T 0 all whom it may concern Be it known that I, Join: H. HALL, a citizen of the United States, residing at High Bridge, in the county of Hunterdon and State of New Jersey, have invented certain new and useful Improvements in Methods of Producing Pipe Balls, of which the follow inn is a specification.
The object of this invention is to provide for the production of manganese steel pipe balls characterized by their uniformly fine grained structure and by their marked ability to resist the abrasive action of hot skelp.
Heretofore, and before my invention, in making pipe balls of manganese steel, the steel has been poured hot, the effect of which is to dispose the crystals in the form of columns at right angles to the surface of the hall. Moreover, this objectionable and inherently weak crystalline structure is further weakened by burning in the heat treatment of the ball. In service the pressure of the skelp on a ball with this structure weakens the crystal bond and tears apart the columnar structure, thereby impairing, if not actually destroying, the efficiency of the ball.
According to my invention the steel is poured at a temperature close to its freezing point whereby I obtain a casting having a uniformly fine grain structure, and which is further characterized by its freedom from columnar crystals. The avoidance of columnar crystals eliminates burning of the 1922. Serial No. 566,105.
casting in the heat treatment of the ball. The balls-are charged in comparatively small lots into a furnace heated to a temperature of at least 800 C. The temperature is then elevated and brought to about 1060 C. In
from twenty-five to forty minutes, whereupon the balls are quenched in water. Practice has demonstrated that a cold-poured ball heated rapidly, in the manner indicated, is remarkable for both its longevity and ability to resist abrasive wear.
Having described my invention, I claim:
1. The method of producing; pipe balls, which consists in casting balls from manganese steel poured at a temperature close to its freezing point, charging the balls into a hot furnace and rapidly elevating the temperature to about 1060 C. and then quenching the balls.
2. The method of producing pipe balls characterized by their freedom from COlUmnar crystals and by their ability to resist abrasive wear, which consists in charging c0ldpoured manganese steel balls into a furnace heated to a temperature of at least 800 0., rapidly raising the temperature to the maximum usually employed in the heat treatment of manganese steel, the balls in water.
3. A pipe ball consisting of a cold-poured manganese steel casting free from columnar crystals and burnt spots.
In testimony whereof I affix my signature.
JOHN H. HALL.
and quenching
US566105A 1922-06-05 1922-06-05 Method of producing pipe balls Expired - Lifetime US1467542A (en)

Priority Applications (1)

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US566105A US1467542A (en) 1922-06-05 1922-06-05 Method of producing pipe balls

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US566105A US1467542A (en) 1922-06-05 1922-06-05 Method of producing pipe balls

Publications (1)

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US1467542A true US1467542A (en) 1923-09-11

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