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Weldable structural steel with high tensile strength - contains controlled amts. of niobium, carbon and nitrogen producing high strength and toughness in welded zones

机译：高抗拉强度的可焊接结构钢-包含受控的amts。铌，碳和氮在焊接区产生高强度和高韧性

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摘要

The steel has high strength in the zones exposed to heat during welding, and also has high resistance to cracking during welding; it contains 0.05-0.08% C, 0.01-0.5% si, 1.2-2.5% Mn, 0.005-0.07% Nb, 0.005-0.03% Ti, 0.005-0.06% Al, the remainder being Fe and unavoidable impurities. The steel contains max. 0.12% C + 10(%N2); and max. 4 x 10-3 of Nb x (C + 10N2), where Nb, C, and N2 are all expressed in %, so the quantity of martensite islands in the welded zone is max. 15% of the section thickness. The steel pref. also contains 1 of:- (all maxima) 0.5% Cu, 1.5% Ni, 0.5% Cr, 0.6% Mo, 0.1% V, 0.003% B, 0.02% Ce, and/or 0.003% max. Ca. Obtd. niobium steel has tensile strength 40-80 kg/mm2. The invention provides increased toughness in the welded zone, so the tendency to cracking during welding is reduced.

机译：该钢在焊接过程中受热的区域具有很高的强度，并且在焊接过程中也具有很高的抗开裂性。它包含0.05-0.08％的C，0.01-0.5％的si，1.2-2.5％的Mn，0.005-0.07％的Nb，0.005-0.03％的Ti，0.005-0.06％的Al，其余为Fe和不可避免的杂质。钢中含有最大0.12％C + 10（％N2）;和最大Nb x（C + 10N2）的4 x 10-3，其中Nb，C和N2均以％表示，因此焊接区中的马氏体岛数量最大。截面厚度的15％。钢的首选。还包含以下成分中的一种:-(全部最大）0.5％的铜，1.5％的镍，0.5％的Cr，0.6％的Mo，0.1％的V，0.003％的B，0.02％的Ce和/或0.003％的最大值。钙没错铌钢的抗拉强度为40-80 kg / mm2。本发明在焊接区提供了增加的韧性，因此降低了焊接期间开裂的趋势。

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公开/公告号FR2419333A1

专利类型
公开/公告日1979-10-05

原文格式PDF
申请/专利权人 KOBE STEEL LTD;
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申请/专利号FR19780006525
发明设计人 YUTAKA KASAMATSU MAKOTO TOMITA AKIO NABETANI ET SYUZI TAKASHIMA;TOMITA MAKOTO;NABETANI AKIO;TAKASHIMA SYUZI;
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申请日1978-03-07
分类号C22C38/12;C22C38/48;
国家 FR
入库时间 2022-08-22 19:30:33

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