Phospahte coated stainless steel wire for cold heading and self-drilling screw using the stainless steel wire

A technology of stainless steel wire and phosphate coating, applied in the direction of screws, nails, phosphating, etc., can solve the problem of not revealing the method of stainless steel wire and so on

Active Publication Date: 2008-09-03
高丽特殊线材株式会社 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the phosphate-coated stainless steel wire and the method of cold heading the stainless steel wire are not disclosed in International Patent Publication No. WO98 / 09006

Method used

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  • Phospahte coated stainless steel wire for cold heading and self-drilling screw using the stainless steel wire
  • Phospahte coated stainless steel wire for cold heading and self-drilling screw using the stainless steel wire
  • Phospahte coated stainless steel wire for cold heading and self-drilling screw using the stainless steel wire

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Embodiment Construction

[0028] The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown.

[0029] A phosphate-coated stainless steel wire for cold heading according to one embodiment of the present invention will now be described.

[0030] Bright annealed wire (bright annealed wire) is prepared as stainless steel wire, which contains by weight less than 0.15% carbon (C), less than 1.0% silicon (Si), less than 1.0% manganese (Mn), 11.50-13.50% Chromium (Cr), less than 0.040% phosphorus (P) and less than 0.030% sulfur. Stainless steel wire can have less than 550N / mm 2 The tensile strength (tensile strength).

[0031] The prepared stainless steel wire was electrolytically pickled using a sulfuric acid solution as an electrolytic solution to completely remove scale on the surface. Next, the stainless steel wire is cathodically polarized in a plating tank using a phosphoric acid solution as an electroly...

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Abstract

Provided are a phosphate coated stainless steel wire for cold heading and a self-drilling screw using the stainless steel wire. Since a phosphate coating is formed on a surface of the stainless steel wire, cold headability and clamping force can be significantly improved, and since outer appearance is improved, a post-process after a heading is not required.

Description

[0001] This application claims Korean Patent Application No. 10-2007-0019908 filed on February 27, 2007 at the Korean Intellectual Property Office, and Korean Patent Application No. 10-2007-0034612 filed on April 9, 2007 Priority of the above-mentioned patent applications is hereby incorporated by reference into the present application as a part of the present application for the designated countries that recognize the incorporated document references. technical field [0002] The present invention relates to a stainless steel wire for cold heading (phosphate coated stainless steel wire) and a self-drilling screw (self-drilling screw) using the stainless steel wire, and in particular to a phosphate coated stainless steel wire for cold heading ) of stainless steel wire coated with phosphate (phosphate coated) and self-drilling screws using the stainless steel wire. Background technique [0003] Generally speaking, the stainless steel wire used for cold heading refers to the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/36F16B25/02B21F5/00B21G3/12
CPCY10T428/2942F16B25/103F16B35/00Y10T428/294C23C22/07C22C38/18B21C1/00F16B25/00
Inventor 朴珠焕金起弘河廷元金尚珍韩钟直
Owner 高丽特殊线材株式会社
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