发明名称 |
HIGH HEAT INPUT BUTT WELDED STRUCTURE EXHIBITING EXCELLENT CHARACTERISTICS IN RESISTANCE TO OCCURRENCE OF BRITTLE FRACTURE |
摘要 |
<p>A large-heat-input butt-welded joint of welded structures prepared by butt-welding high-strength steel plates over 50 mm in thickness, having excellent brittle fracture resistance, is characterized by : (a1) the hardness of the weld metal is not more than 110% of the hardness of the base metal or (a2) the hardness of the weld metal is not less than 70% and not more than 110% of the hardness of the base metal, and, as required, (b) the width of the weld metal is not more than 70% of the plate thickness of the base metal, (c) the width of the region affected by welding whose hardness is softened to not more than 95% of the hardness of the non-heat-affected base metal has a width not less than 5 mm, and/or (d) the prior austenite grain size in the heat-affected zone (HAZ) contacting the welding fusion line is not more than 200 µm.</p> |
申请公布号 |
EP1695785(A1) |
申请公布日期 |
2006.08.30 |
申请号 |
EP20040793174 |
申请日期 |
2004.10.22 |
申请人 |
NIPPON STEEL CORPORATION |
发明人 |
ISHIKAWA, TADASHI;INOUE, TAKEHIRO;SHIMANUKI, HIROSHI;KOSEKI, TADASHI;OTANI, JUN;MINAGAWA, MASANORI;KOJIMA, AKIHIKO |
分类号 |
B23K9/23;B23K9/00;B23K9/02;B23K31/12;B23K35/30;B23K103/04;C22C38/00;C22C38/06;C22C38/14 |
主分类号 |
B23K9/23 |
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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