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Patenting consists of passing the wire through tubes in a furnace at about 970 o C. Shteinberg 1 in 1922 following protracted experiments at the Beloretsk steel wire factory in joint work with engineers N.
Wire drawing is usually performed cold although there are some cases where steel rodwire is drawn hot to improve ductility.
Steel wire patenting process. The patenting of steel wires is a heat-treating process known for some time and applied generally which consists of an austeniting annealing phase and an isothermal quenching holding phase. The patenting process developed in England involves running high-carbon steel wires through tubes in a furnace heated to a temperature of 970 F then rapidly cooling the wire in air or molten lead. This has the effect of strengthening the wire without separating the iron from the other elements in the wire.
Wire ropes for haulage purposes are usually made from carbon steel wires ranging from 035 to 05 carbon and before drawing the material is subject to a heat-treatment known as patenting. Patenting consists of passing the wire through tubes in a furnace at about 970 o C. Patenting of steel wire is a common process whereby the wire is heated to 950 C to form austenite and then rapidly quenched in molten lead held at 500 C.
The fine-grained structure so formed patenting sorbite has high strength coupled with good ductility. The optimization of lead patenting heat treatment process of high carbon steel wires is done using Taguchi methodology. The experiments have been carried out on an electric powered furnace in.
Patenting involves heating a steel of approximately eutectoid composition 084 wt carbon 021Si 064Mn into an austenitic state followed by transformation at a temperature of about 450C to achieve an interlamellar spacing of 100 nm or less. Patenting is a heat treatment process that improves the durability and strength of the wire. The process involves an in-line heat treatment at 970 degrees Fahrenheit and then cooled in a variety of mediums including air and lead.
The resulting wire has a fine pearlite structure with little or no separation of the ferrite iron. Steel wire manufacturing process optimization operational process improvement performance improvement non-contact inspection quality statistical method manufacturing quality control manufacturing process design pre-approval inspection design of experiments roll product incoming inspection music wire guy wire acceptance test. The annealing and patenting lines are used to heat treat the wire in order to re-establish the original grain structure of the steel so that the wire can be further processed to make thinner products.
In steel drawing process the annealing process is also called patenting. Wire drawing is usually performed cold although there are some cases where steel rodwire is drawn hot to improve ductility. Die lubrication is essential in cold drawing to achieve a good surface finish as well to maximize the life of the die.
The patenting process first involves heating the wires in an austenitizing furnace usually direct fired or muffle tube to about 950C in order to form a uniform austenite structure of largish grain size. The patenting process as defined in claim 1 further comprising the step of imparting pull to sections of the steel wire leaving the patenting tank at a higher speed than to a section entering the preheating tank thereby to reduce the cross-sections of the resulting steel wires without the application of. 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 C. To about 1100 C. For a period of at least about 2 seconds.
Wherein said steel wire consists essentially of about 9661 to about 98905 weight percent iron from about 072 to about 104 weight. Wire and fabricate steel-wire rope for a variety of applications. The technology of patenting steel wire was first mastered in the USSR by S.
Shteinberg 1 in 1922 following protracted experiments at the Beloretsk steel wire factory in joint work with engineers N. Meshkov Structural Creterion of Ultimate Strength of Steel in Russian ONTI IMF Akad. Nauk USSR Kiev 1969.
This article with the aid of illustrations and curves describes an experiment used to understand the cooling characteristics and transformation behavior of steel wires during patenting. The two aqueous polymer quenchants used as alternatives for lead baths. This fully pearlitic structure in hypereutectoid steel wires are obtained by a special heat treatment process called lead patenting process.
This pearlitic structure in steel wires is the best example of natural nanomaterials. It consists of alternate very fine layers of ferrite lamellae and cementite lamellae.