发明名称 |
Ståltråd med en struktur av den kald-trukkete, lavere bainitt-typen og fremgangsmåte ved fremstilling av slik tråd, samt anvendelse av en slik tråd |
摘要 |
PCT No. PCT/FR90/00920 Sec. 371 Date Jun. 17, 1992 Sec. 102(e) Date Jun. 17, 1992 PCT Filed Dec. 18, 1990 PCT Pub. No. WO91/09933 PCT Pub. Date Jul. 11, 1991.A metal wire having the following features: (a) it is formed, at least in part, by a steel having a carbon content of at least 0.1% and at most 0.6% and a boron content of less than 8 ppm; (b) the steel of the wire has a strain-hardened lower bainite type structure (7); (c) the diameter of the wire varies from 0.10 to 0.40 mm; (d) the resistance to rupture of the wire is at least equal to 2800 MPa; (e) the elongation upon rupture of the wire is at least equal to 0.4%. The method according to the invention for producing this wire consists in strain hardening a machine wire having 28% to 90% proeutectoid ferrite and 72% to 10% perlite, thereupon carrying out a heat treatment to obtain a structure of lower bainite type, then effecting a strain hardening on the wire, the temperature of the wire upon the strain hardening being less than 0.3 TF, TF being the melting point of the steel expressed in Kelvin. |
申请公布号 |
NO179456(C) |
申请公布日期 |
1996.10.09 |
申请号 |
NO19920002419 |
申请日期 |
1992.06.19 |
申请人 |
COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN - MICHELIN |
发明人 |
ARNAUD, JEAN-CLAUDE;PRUDENCE, BERNARD PIERRE |
分类号 |
C21D9/52;C21D1/20;C21D8/06;C22C38/00;(IPC1-7):C21D8/06 |
主分类号 |
C21D9/52 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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