Patents Assigned to Waterbury Rolling Mills, Inc.
  • Patent number: 6695934
    Abstract: A copper base alloy consisting essentially of tin in an amount from about 0.1 to about 1.5% by weight, phosphorous in an amount from about 0.01 to about 0.35% by weight, iron in an amount from about 0.01 to about 0.8% by weight, zinc in an amount from about 1.0 to about 15% by weight, and the balance essentially copper, including phosphide particles uniformly distributed throughout the matrix, is described. The alloy is characterized by an excellent combination of physical properties. The process of forming the copper base alloy described herein includes casting, homogenizing, rolling, process annealing and stress relief annealing.
    Type: Grant
    Filed: March 16, 2000
    Date of Patent: February 24, 2004
    Assignee: Waterbury Rolling Mills, Inc.
    Inventor: Ashok K. Bhargava
  • Patent number: 6679956
    Abstract: A process for making a copper base alloy comprises the steps of casting a copper base alloy containing tin, zinc, iron and phosphorous and forming phosphide particles uniformly distributed throughout the matrix. The forming step comprises homogenizing the alloy at least once for at least one hour at a temperature from 1000 to 1450° F., rolling to final gauge including at least one process anneal for at least one hour at 650 to 1200° F. followed by slow cooling, and stress relief annealing at final gauge for at lest one hour at 300 to 600° F.
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: January 20, 2004
    Assignee: Waterbury Rolling Mills, Inc.
    Inventor: Ashok K. Bhargava
  • Patent number: 6436206
    Abstract: The present invention relates to copper base alloys containing tin, phosphorous, iron, and zinc and having phosphide particles uniformly distributed through the alloy matrix, which phosphide particles include fine and coarse phosphide particles. The alloy is produced using a process which comprises casting a copper base alloy consisting essentially of tin in an amount greater than about 1.5 wt. % up to 4.0 wt. %, phosphorous from 0.01 to 0.20 wt. %, iron from 0.01 to 0.80 wt. %, zinc in an amount greater than 1.0 wt. % up to 8.0 wt. %, and the balance essentially copper; homogenizing at least once for at least one hour at from 1000° F. to 1450° F.; rolling to final gauge including at least one process anneal for at least one hour at 650° F. to 1200° F. followed by slow cooling, preferably at a rate in the range of 20° F. to 200° F. per hour; and stress relief annealing at final gauge for at least one hour at 300° F. to 600° F.
    Type: Grant
    Filed: April 1, 1999
    Date of Patent: August 20, 2002
    Assignee: Waterbury Rolling Mills, Inc.
    Inventor: Ashok K. Bhargava
  • Publication number: 20010009168
    Abstract: The present invention relates to copper-magnesium-phosphorous alloys. In a first embodiment, copper-magnesium-phosphorous alloys in accordance with the present invention consist essentially of magnesium in an amount from about 0.01 to about 0.25% by weight, phosphorous in an amount from about 0.01 to about 0.2% by weight, silver in an amount from about 0.001 to about 0.1% by weight, iron in an amount from about 0.01 to about 0.25% by weight, and the balance copper and inevitable impurities. Preferably, the magnesium to phosphorous ratio is greater than 1.0. In a second embodiment, copper-magnesium-phosphorous alloys in accordance with the present invention consist essentially of magnesium in an amount from about 0.01 to about 0.25% by weight, phosphorous in an amount from about 0.01 to about 0.2% by weight, optionally silver in an amount from about 0.001 to about 0.1% by weight, at least one element selected from the group consisting of nickel, cobalt, and mixtures thereof in an amount from about 0.
    Type: Application
    Filed: March 7, 2001
    Publication date: July 26, 2001
    Applicant: WATERBURY ROLLING MILLS, INC.
    Inventor: Ashok K. Bhargava
  • Patent number: 6241831
    Abstract: The present invention relates to copper-magnesium-phosphorous alloys. In a first embodiment, copper-magnesium-phosphorous alloys in accordance with the present invention consist essentially of magnesium in an amount from about 0.01 to about 0.25% by weight, phosphorous in an amount from about 0.01 to about 0.2% by weight, silver in an amount from about 0.001 to about 0.1% by weight, iron in an amount from about 0.01 to about 0.25% by weight, and the balance copper and inevitable impurities. Preferably, the magnesium to phosphorous ratio is greater than 1.0. In a second embodiment, copper-magnesium-phosphorous alloys in accordance with the present invention consist essentially of magnesium in an amount from about 0.01 to about 0.25% by weight, phosphorous in an amount from about 0.01 to about 0.2% by weight, optionally silver in an amount from about 0.001 to about 0.1% by weight, at least one element selected from the group consisting of nickel, cobalt, and mixtures thereof in an amount from about 0.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: June 5, 2001
    Assignee: Waterbury Rolling Mills, Inc.
    Inventor: Ashok K. Bhargava
  • Patent number: 6099663
    Abstract: A copper base alloy consisting essentially of tin in an amount from about 0.1 to about 1.5% by weight, phosphorous in an amount from about 0.01 to about 0.35% by weight, iron in an amount from about 0.01 to about 0.8% by weight, zinc in an amount from about 1.0 to about 15% by weight, and the balance essentially copper, including phosphide particles uniformly distributed throughout the matrix, is described. The alloy is characterized by an excellent combination of physical properties. The process of forming the copper base alloy described herein includes casting, homogenizing, rolling, process annealing and stress relief annealing.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: August 8, 2000
    Assignee: Waterbury Rolling Mills, Inc.
    Inventor: Ashok K. Bhargava
  • Patent number: 5985055
    Abstract: A copper base alloy consisting essentially of tin in an amount from about 1.0 to 11.0% by weight, phosphorous in an amount from about 0.01 to 0.35% by weight, iron in an amount from about 0.01 to about 0.8% by weight, and the balance essentially copper, including phosphide particles uniformly distributed throughout the matrix, is described. The alloy is characterized by an excellent combination of physical properties. The process of forming the copper base alloy described herein includes casting, homogenizing, rolling, process annealing and stress relief annealing.
    Type: Grant
    Filed: August 11, 1998
    Date of Patent: November 16, 1999
    Assignee: Waterbury Rolling Mills, Inc.
    Inventor: Ashok K. Bhargava
  • Patent number: 5916386
    Abstract: A copper base alloy consisting essentially of tin in an amount from about 1.0 to 11.0% by weight, phosphorous in an amount from about 0.01 to 0.35% by weight, iron in an amount from about 0.01 to about 0.8% by weight, and the balance essentially copper, including phosphide particles uniformly distributed throughout the matrix, is described. The alloy is characterized by an excellent combination of physical properties. The process of forming the copper base alloy described herein includes casting, homogenizing, rolling, process annealing and stress relief annealing.
    Type: Grant
    Filed: July 28, 1998
    Date of Patent: June 29, 1999
    Assignee: Waterbury Rolling Mills, Inc.
    Inventor: Ashok K. Bhargava
  • Patent number: 5893953
    Abstract: A copper base alloy consisting essentially of tin in an amount from about 0.1 to about 1.5% by weight phosphorous in an amount from about 0.01 to about 0.35% by weight, iron in an amount from about 0.01 to about 0.8% by weight, zinc in an amount from about 1.0 to about 15% by weight, and the balance essentially copper, including phosphide particles uniformly distributed throughout the matrix, is described. The alloy is characterized by an excellent combination of physical properties. The process of forming the copper base alloy described herein includes casting, homogenizing, rolling, process annealing and stress relief annealing.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: April 13, 1999
    Assignee: Waterbury Rolling Mills, Inc.
    Inventor: Ashok K. Bhargava
  • Patent number: 5865910
    Abstract: Copper base alloys consisting essentially of 1.0 to 4.0% tin, 0.01 to 0.20% phosphorous, 0.01 to 0.80% iron, 0.1 to 12.0% zinc and the balance essentially copper, including phosphide particles uniformly distributed throughout the matrix. The alloy is characterized by an excellent combination of physical properties. The process of the present invention includes homogenizing, rolling, process annealing and stress relief annealing.
    Type: Grant
    Filed: November 7, 1996
    Date of Patent: February 2, 1999
    Assignee: Waterbury Rolling Mills, Inc.
    Inventor: Ashok K. Bhargava
  • Patent number: 5820701
    Abstract: A copper base alloy consisting essentially of tin in an amount from about 1.0 to 11.0% by weight, phosphorous in an amount from about 0.01 to 0.35% by weight, iron in an amount from about 0.01 to about 0.8% by weight, and the balance essentially copper, including phosphide particles uniformly distributed throughout the matrix, is described. The alloy is characterized by an excellent combination of physical properties. The process of forming the copper base alloy described herein includes casting, homogenizing, rolling, process annealing and stress relief annealing.
    Type: Grant
    Filed: December 26, 1996
    Date of Patent: October 13, 1998
    Assignee: Waterbury Rolling Mills, Inc.
    Inventor: Ashok K. Bhargava