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Martensitic wire with thin polymer coating

A polymer coating and martensite technology, applied in the field of manufacturing the long and narrow steel element, polymer coating, can solve the problems of high environmental pollution, increased cost, high cost, etc., to reduce environmental pollution, improve friction coefficient, The effect of improving the coefficient of kinetic friction

Active Publication Date: 2012-04-18
NV BEKAERT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polymer coating produces a pigmented coating, however, galvanizing prior to polymer coating results in higher expense and high environmental pollution for steel elements
Additional lines for polymer coating also add expense

Method used

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  • Martensitic wire with thin polymer coating
  • Martensitic wire with thin polymer coating
  • Martensitic wire with thin polymer coating

Examples

Experimental program
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Embodiment Construction

[0046] figure 1 A first embodiment is shown in . A round steel wire 12 with a carbon content of 0.6% and a diameter of 0.80 mm has a steel core 14 and a polymer coating 16 . The polymer coating 16 has a thickness of 3 μm.

[0047]To manufacture the polymer-coated round steel wire 12, the starting product is a wire billet which is first cold drawn to its final (steel) diameter in a number of successive drawing steps. Then, the steel core 14 is first austenitized at a temperature of 860°C to 1000°C, and then rapidly cooled until the temperature is lower than 60°C, then tempered at a temperature of 300°C to 450°C, and then cooled until the temperature is 150°C. °C to 200 °C to obtain a tempered martensitic structure. Then, instead of waiting until the tempered steel wire cools to ambient temperature, the tempered steel wire 14 is immersed in a polymer bath having a polymer concentration of 30 vol% and a temperature below 70° C. to obtain a 3 μm polymer object coating. The he...

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Abstract

An elongated steel element (12) with a martensite, tempered martensite, bainite or sorbite structure has a polymer coating (16) with a thickness lower than 20 [mu]m immediately upon the elongated steel element (14). The friction coefficient and corrosion resistance are both improved by the polymer coating at a lower cost.

Description

technical field [0001] The invention relates to elongated steel elements having a martensite, tempered martensite, bainite or sorbite structure, which have a polymer coating directly thereon. The invention also relates to a method of manufacturing the elongated steel element. Background technique [0002] It is well known that the coefficient of friction of steel wires is very important for further downstream processing such as brush manufacturing. [0003] A common way to reduce the coefficient of friction is through the use of lubricants, such as oil. Steel wires are usually oiled to improve further downstream processing, thereby also providing additional corrosion resistance. However, the presence of oil on the surface of the thread has the disadvantage of creating a sticky surface. For example, when oiled steel wires are bundled, it is difficult to divide these oiled bundles into predetermined smaller bundles. In addition, oil can contaminate work areas, potentially ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/20B29C47/02C21D9/52C23C2/26H01B3/30B29C48/05B29C48/06
CPCB29C47/0016A46D1/00D07B2201/2012D07B2205/507D01F1/00H01B3/30B29C47/025D07B2201/2013D07B1/148D07B2205/3039D07B2201/2009C23C2/26B05D7/20C21D2211/008C21D9/525C21D9/52D07B2401/2025D07B2201/2003B29C47/0014B29C48/05B29C48/06D07B2801/10
Inventor L·S·勒杜杨海强齐娜乔
Owner NV BEKAERT SA