The Goodyear & Tire Rubber Company

Other

Anand Waman Bhagwat

Kenneth J Palmer

Amit Prakash

Dong Kwang Kim

Charles N Tonteling

Eddie F Riggenbach

Rodger Todd

Sameer Suresh Vijayakar

Steven Shannon Wray

The present invention relates to a method of forming a coil of spring wire by winding a wire into a coil spring formed of a plurality of rings of the wire wherein each of the rings has a substantially constant strain rate. The forming speed of the wire being wound is controlled so that each of the rings has a substantially constant strain rate and minimum work hardening occurs.

Method of manufacturing flat wire coil springs to improve fatigue life and avoid blue brittleness

This invention reveals steel alloys for use in manufacturing reinforcing wires for rubber products, such as tires. The steel filaments made with such steel alloys have an outstanding combination of strength and ductility. The steel alloys of this invention can be manufactured into filaments having a tensile strength in the range of 4000 MPa to 5000 MPa. Additionally, these can be patented in a low-cost process due to their having a very fast rate of isothermal transformation. This allows the steel in the steel wire being patented to transform from a face-centered cubic microstructure to an essentially body-centered cubic microstructure within a very short period. This invention more specifically discloses a steel alloy composition which is particularly suitable for use in manufacturing reinforcing wire for rubber products which consists essentially of (a) iron, (b) about 1.05 to about 1.7 weight percent carbon, (c) about 0.2 to about 0.8 weight percent manganese, (d) about 0.1 to about 0.8 weight percent silicon, (e) about 0.1 to about 0.7 weight percent chromium, (f) 0.0 to about 0.5 weight percent nickel, (g) 0.0 to about 0.3 weight percent copper, (h) 0.0 to about 0.5 weight percent molybdenum and (i) 0.0 to about 0.5 weight percent vanadium; with the proviso that the carbon equivalent of the steel alloy is within the range of 1.15 to 1.8 weight percent. It is highly preferred for the steel alloys of this invention to contain from about 0.02 to about 0.3 weight percent copper.

Steel tire cord with high tensile strength

This invention discloses a process for producing a high strength filament, said process comprising the steps of: (1) heating a steel wire to a temperature which is within the range of about 850.degree. C. to about 1100.degree. C. for a period of at least about 2 seconds; wherein said steel wire consists essentially of about 96.61 to about 98.905 weight percent iron, from about 0.72 to about 1.04 weight percent carbon, from about 0.3 to about 0.8 weight percent manganese, from about 0.05 to about 0.4 weight percent silicon, from about 0.02 to about 0.3 weight percent copper, and from about 0.005 to about 0.85 weight percent of at least one member selected from the group consisting of chromium, vanadium, nickel and boron, with the proviso that the total amount of silicon, manganese, chromium, vanadium, nickel and boron in the microalloyed high carbon steel is within the range of about 0.7 to 0.9 weight percent to produce a heated steel wire; (2) continuously cooling the heated steel wire at a cooling rate of less than about 60.degree. C. per second until a transformation from austenite to pearlite begins; (3) allowing the transformation from austenite to pearlite to proceed with an increase in the wire temperature resulting from recalescence to produce a patented steel wire; (4) cooling the patented steel wire to ambient temperature; (5) brass-plating the patented steel wire to produce a brass-plated wire; and (6) cold-drawing the brass-plated steel wire to a diameter which is within the range of about 0.10 mm to about 0.45 mm to produce a high strength filament.

Process for producing patented steel wire

It is usually desirable to utilize brass coated steel wires in the reinforcement of rubber articles, such as tires. This invention relates to a process for simultaneously parenting and brass plating a steel wire which comprises:

Process for patenting and brass plating steel wire

A method and apparatus for manufacturing a strip of ply or belt stock reinforced with steel monofilaments fed from a plurality of reels (60, 60', 60') mounted on the spindles (54) of a reel support structure (18). The article of manufacture which results from the method is a uniform strip of reinforced ply or belt stock of higher epi, smaller gauge and fewer splices than possible with prior method and apparatus.

Method and apparatus for manufacturing ply stock

A method and apparatus for manufacturing a strip of ply or belt stock reinforced with steel monofilaments fed from a plurality of reels (60,60', 60') mounted on the spindles (54) of a reel support structure (18). The article of manufacture which results from the method is a uniform strip of reinforced ply or belt stock of higher epi, smaller gauge and fewer splices than possible with prior method and apparatus. A plurality of the reels for feeding the monofilaments are mounted on a spindle secured at one end, with friction means (64,66) disposed between each of the reels located adjacent to each other for applying an axial braking force to each of the reels. A spring biasing means (68) is disposed between each of the reels located adjacent to each other for pressing the friction means (64,66) against the adjacent reels.

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Hudson, OH, United States of America

Anand Waman Bhagwat