AUSTENITIC STEEL HAVING SUPERIOR MACHINABILITY AND CRYOGENIC TEMPERATURE TOUGHNESS IN WELD HEAT AFFECTED ZONES THEREOF AND METHOD FOR MANUFACTURING SAME
    3.
    发明公开
    AUSTENITIC STEEL HAVING SUPERIOR MACHINABILITY AND CRYOGENIC TEMPERATURE TOUGHNESS IN WELD HEAT AFFECTED ZONES THEREOF AND METHOD FOR MANUFACTURING SAME 审中-公开
    随着焊接热影响区域,以用于生产杰出切削加工性和低温韧性和工艺奥氏体钢

    公开(公告)号:EP2799571A1

    公开(公告)日:2014-11-05

    申请号:EP12862659.5

    申请日:2012-12-27

    申请人: Posco

    摘要: Provided are austenitic steel having superior machinability and cryogenic temperature toughness in weld heat affected zones thereof and a method for manufacturing the same, the austenitic steel comprising, in weight %, 15 to 35% of manganese (Mn), carbon(C) that satisfies 23.6C+Mn ≥ 28 and 33.5C-Mn ≤ 23, 5% or lower (but not 0%) of copper (Cu), chrome (Cr) that satisfies 28.5C+4.4Cr ≤ 57 (but not 0%), the remainder being Fe and other inevitable impurities, the Charpy impact value of the weld heat affected zones at -196°C being 41J or higher. According to the present invention, austenitic steel having superior machinability and cryogenic temperature toughness in weld heat affected zones thereof is provided in which the cryogenic steel is obtained in an inexpensive manner, a stable austenite phase can be formed at a low temperature and the generation of carbide can be effectively inhibited.

    摘要翻译: 本发明提供具有优异的机械加工性和在其焊接热影响区的低温韧性和用于制造其的方法奥氏体钢,奥氏体钢,其包括,以重量%计,15至35%的锰(Mn),碳(C)那样SATIS外资企业 23.6C +锰‰¥28和33.5C-Mn系‰¤23,铜的5%或更低(但不为0%)(铜),铬(Cr)的确实SATIS外资企业28.5C + 4.4Cr‰¤57(但不为0 %),其余为Fe和其它不可避免的杂质,在196℃时的焊接热影响区为41J或更高的却贝冲击值。 。根据本发明,具有在其被提供焊接热影响区,其中所述低温钢在廉价的方式获得优异的机械加工性和低温韧性的奥氏体钢,具有稳定奥氏体相可以在低温下形成,并且产生的 碳化物可以有效地抑制。