- 专利标题: STEEL WIRE ROD HAVING COATING FILM THAT HAS EXCELLENT CORROSION RESISTANCE AND WORKABILITY, AND METHOD FOR PRODUCING SAME
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申请号: US15129231申请日: 2015-02-26
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公开(公告)号: US20180187119A1公开(公告)日: 2018-07-05
- 发明人: Hirotaka ITO , Kasumi YANAGISAWA , Takahiro OZAWA , Keita SHIIHASHI , Shinobu KOMIYAMA , Tsuyoshi HATAKEYAMA
- 申请人: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) , NIHON PARKERIZING CO., LTD.
- 申请人地址: JP Kobe-shi JP Chuo-ku
- 专利权人: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.),NIHON PARKERIZING CO., LTD.
- 当前专利权人: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.),NIHON PARKERIZING CO., LTD.
- 当前专利权人地址: JP Kobe-shi JP Chuo-ku
- 优先权: JP2014-070445 20140328
- 国际申请: PCT/JP15/55679 WO 20150226
- 主分类号: C10M111/04
- IPC分类号: C10M111/04 ; C10M103/06 ; C10M107/24 ; C10M159/06 ; C10M133/56 ; C10M163/00 ; C10M169/04
摘要:
The present invention provides a steel wire rod having a lubricating coating film, which can achieve both workabilities such as wire drawability, spike property and ball ironing property, and corrosion resistance such as long-term rust prevention property; and a method for producing the same. Disclosed are a steel wire rod having a coating film containing no phosphorus, wherein the coating film includes a lower layer coating film composed of oxide and/or hydroxide of zirconium and having a film thickness of 1.0 to 200 nm, and an upper layer coating film containing silicon and tungsten, in order from a steel wire rod side, a mass ratio of tungsten/silicon being in a range of 1.3 to 18; and a method for producing the above steel wire rod, which includes bringing an aqueous chemical conversion treatment solution, which has a pH in a range of 2.5 to 5.0 and contains a water-soluble zirconium compound dissolved therein, into contact with a surface of a steel wire rod to form a lower layer coating film.