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1.发明申请ELECTRIC FURNACE STEEL FOR CARBURIZING WITHOUT MO ADDITION AND MANUFACTURING METHOD THEREFOR 有权电加热用于无添加剂的电热钢及其制造方法公开(公告)号：US20150023833A1
公开(公告)日：2015-01-22
申请号：US14334801
申请日：2014-07-18
发明人： Yuji Adachi , Naoki Fukuda
IPC分类号： C21B11/10 , C22C38/44 , C22C38/00 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/54 , C22C38/42
CPC分类号： C22C38/001 , C21C5/5211 , C22C33/04 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/32 , C22C38/42 , C22C38/44 , C22C38/54 , C23C8/22 , Y02P10/216
摘要： An electric furnace steel contains, by mass %, C: 0.12 to 0.28%, Si: equal to or less than 0.15%, Mn: 0.65 to 0.95%, P: equal to or less than 0.035%, S: equal to or less than 0.035%, Cr: 1.35 to 1.90%, Al: 0.020 to 0.050%, and N: 0.0080 to 0.0230%. A scrap material is selected such that Cu, Ni, and Mo that derive from the scrap material and are thus contained as impurities in the electric furnace steel satisfy Expression 1. The electric furnace steel further contains Fe and unavoidable impurities as a remainder thereof. Accordingly, the electric furnace steel can secure carburizing quality equivalent to or higher than that of Cr—Mo steel, and can have properties equivalent to or higher than that of Cr—Mo steel, without adding Mo. ([Cu]+2×[Ni])0.76×[Mo]≧0.0040 Expression 1:
摘要翻译： 电炉钢以质量％计含有C：0.12〜0.28％，Si：0.15％以下，Mn：0.65〜0.95％，P：等于或小于0.035％，S：等于或等于 0.035％以下，Cr：1.35〜1.90％，Al：0.020〜0.050％，N：0.0080〜0.0230％。 选择废料，使得从废料中衍生并因此在电炉钢中作为杂质而含有的Cu，Ni和Mo满足表达式1.电炉钢还含有Fe和其余部分的不可避免的杂质。 因此，电炉钢可以确保等于或高于Cr-Mo钢的渗碳质量，并且可以具有等于或高于Cr-Mo钢的性能，而不添加Mo（[Cu] + 2×[ Ni]）0.76×[Mo]≥0.0040表达式1：
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2.发明授权Manufacturing method for electric furnace steel for carburizing without Mo addition 有权无钼添加用于渗碳的电炉钢的制造方法公开(公告)号：US09580778B2
公开(公告)日：2017-02-28
申请号：US14334801
申请日：2014-07-18
发明人： Yuji Adachi , Naoki Fukuda
IPC分类号： C22C38/44 , C22C38/42 , C22C38/06 , C22C38/04 , C22C33/04 , C22C38/00 , C22C38/54 , C22C38/02 , C22C38/20 , C22C38/22 , C22C38/32 , C23C8/22 , C21C5/52
CPC分类号： C22C38/001 , C21C5/5211 , C22C33/04 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/32 , C22C38/42 , C22C38/44 , C22C38/54 , C23C8/22 , Y02P10/216
摘要： An electric furnace steel contains, by mass %, C: 0.12 to 0.28%, Si: equal to or less than 0.15%, Mn: 0.65 to 0.95%, P: equal to or less than 0.035%, S: equal to or less than 0.035%, Cr: 1.35 to 1.90%, Al: 0.020 to 0.050%, and N: 0.0080 to 0.0230%. A scrap material is selected such that Cu, Ni, and Mo that derive from the scrap material and are thus contained as impurities in the electric furnace steel satisfy Expression 1. The electric furnace steel further contains Fe and unavoidable impurities as a remainder thereof. Accordingly, the electric furnace steel can secure carburizing quality equivalent to or higher than that of Cr—Mo steel, and can have properties equivalent to or higher than that of Cr—Mo steel, without adding Mo. ([Cu]+2×[Ni])0.76×[Mo]≧0.0040 Expression 1:
摘要翻译： 电炉钢以质量％计含有C：0.12〜0.28％，Si：0.15％以下，Mn：0.65〜0.95％，P：等于或小于0.035％，S：等于或等于 0.035％以下，Cr：1.35〜1.90％，Al：0.020〜0.050％，N：0.0080〜0.0230％。 选择废料，使得从废料中衍生并因此在电炉钢中作为杂质而含有的Cu，Ni和Mo满足表达式1.电炉钢还含有Fe和其余部分的不可避免的杂质。 因此，电炉钢可以确保等于或高于Cr-Mo钢的渗碳质量，并且可以具有等于或高于Cr-Mo钢的性能，而不添加Mo（[Cu] + 2×[ Ni]）0.76×[Mo]≥0.0040表达式1：
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