公开(公告)号：US20170356070A1

公开(公告)日：2017-12-14

申请号：US15599497

申请日：2017-05-19

申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

发明人： Takeo MIYAMURA ,  Shigenobu NAMBA ,  Zhuyao CHEN

IPC分类号： C22C38/10 ,  C22C38/04 ,  C22C38/28 ,  C22C38/00 ,  C22C38/50 ,  C22C38/22 ,  C22C38/06

CPC分类号： C22C38/105 ,  C21D1/18 ,  C21D6/004 ,  C21D6/007 ,  C21D6/02 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/28 ,  C22C38/44 ,  C22C38/50 ,  C22C38/52

摘要： Disclosed is a mar aging steel containing, in combination in mass percent, C in a content from greater than 0% to 0.02%, Mn in a content from greater than 0% to 0.3%, Si in a content from greater than 0% to 0.3%, Ni in a content of 10% to 13%, Mo in a content of 0.5% to 3.5%, Co in a content of 9% to 12%, Cr in a content of 1.5% to 4.5%, Ti in a content of 1.5% to 4.5%, and Al in a content of 0.01% to 0.2%, where the total content of Mo and Ti is 5.0 mass percent or less, and the ratio ([Mo]/[Ti]) of the Mo content [Mo] to the Ti content [Ti] is 1.0 or less, with the remainder consisting of iron and inevitable impurities.

公开(公告)号：US20220134486A1

公开(公告)日：2022-05-05

申请号：US17435745

申请日：2020-03-23

申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

发明人： Hiromi OYAMADA ,  Hideaki TAKAUCHI ,  Yoshimasa MURANISHI ,  Shigenobu NAMBA ,  Takeo MIYAMURA

IPC分类号： B23K35/02 ,  C22C38/54 ,  C22C38/52 ,  C22C38/04 ,  C22C38/02 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  B23K9/173 ,  B23K35/30

摘要： Provided is a covered electrode for high-Cr ferritic heat-resistant steels with which it is possible to obtain weld metal that has the toughness required for weld parts and has excellent high temperature strength. The covered electrode for high-Cr ferritic heat-resistant steels includes a steel core and a coating agent that coats the core. The covered electrode comprises C, Si, Mn, Ni, Cr, Mo, V, Co, B, Nb, W, N, and Fe each in a predetermined range in the total mass of the covered electrode, contains a slag forming agent, and has a total of the W content and the Co content of 2.8 mass % or more.

公开(公告)号：US20170067139A1

公开(公告)日：2017-03-09

申请号：US15123125

申请日：2015-03-04

申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

发明人： Takeo MIYAMURA ,  Shigenobu NAMBA

IPC分类号： C22C38/54 ,  C22C38/48 ,  C22C38/44 ,  C21D6/00 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/50 ,  C22C38/42

CPC分类号： C22C38/54 ,  C21D6/004 ,  C21D9/0068 ,  C21D2211/001 ,  C21D2211/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

摘要： An austenitic heat-resistant steel containing, by mass, 0.05-0.16% of C, 0.1-1% of Si, 0.1-2.5% of Mn, 0.01-0.05% of P, less than 0.005% of S, 7-12% of Ni, 16-20% of Cr, 2-4% of Cu, 0.1-0.8% of Mo, 0.1-0.6% of Nb, 0.1-0.6% of Ti, 0.0005-0.005% of B, 0.001-0.15% of N, and 0.005% or less of Mg and/or 0.005% or less of Ca, the amounts of Nb and Ti being 0.3% or above in total, with the remainder being made up by Fe and unavoidable impurities. The cumulative number density of a precipitate has a particle diameter of over 0 nm to 100 urn being 0.1-2.0/μm2, the precipitate particle diameter corresponding to half of the cumulative number density in the distribution of the cumulative number density and the precipitate particle diameter is 70 nm or less, the average hardness is 160 Hv or less, and the grain size number is 7.5 or above.

摘要翻译： 一种奥氏体系耐热钢，其含有0.05〜16％的C，0.1〜1％的Si，0.1〜2.5％的Mn，0.01〜0.05％的P，小于0.005％的S，7〜12％ 的Ni，16-20％的Cr，2-4％的Cu，0.1-0.8％的Mo，0.1-0.6％的Nb，0.1-0.6％的Ti，0.0005-0.005％的B，0.001-0.15％的 N和0.005％以下的Mg和/或0.005％以下的Ca，Nb和Ti的总量为0.3％以上，余量由Fe和不可避免的杂质构成。 沉淀物的累积数密度为0nm〜100μm的粒径为0.1〜2.0μm/μm2，在累积密度分布中的累计密度的一半的沉淀粒径和析出粒径 为70nm以下，平均硬度为160Hv以下，粒径为7.5以上。

公开(公告)号：US20220134489A1

公开(公告)日：2022-05-05

申请号：US17430110

申请日：2020-02-13

申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

发明人： Yoshimasa MURANISHI ,  Hiromi OYAMADA ,  Hideaki TAKAUCHI ,  Takeo MIYAMURA ,  Shigenobu NAMBA

IPC分类号： B23K35/30 ,  C22C38/54 ,  C22C38/52 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

摘要： A welding material may be suitable for high-Cr ferritic heat-resistant steels, and may suppress δ-ferrite occurrence, i.e., a soft structure, thereby improving the toughness, and enabling the achievement of a welded metal that has good cracking resistance and strength at high temperatures. Such welding materials for high-Cr ferritic heat-resistant steels may contain C, Si, Mn, S, Co, V, Nb, W, N, and O, respectively within specific ranges and limits Ni and P respectively to specific ranges, while containing from 8.0% by mass to 9.5% by mass (inclusive) of Cr and from 0.02% by mass to 0.20% by mass (inclusive) of Mo and additionally limiting Cu to less than 0.05% by mass, with the balance being made up of Fe and unavoidable impurities.

公开(公告)号：US20200071804A1

公开(公告)日：2020-03-05

申请号：US16489492

申请日：2018-02-05

申请人： KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)

发明人： Zhuyao CHEN ,  Takeo MIYAMURA ,  Shigenobu NAMBA

IPC分类号： C22C38/52 ,  C22C38/50 ,  C22C38/44 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D6/00

摘要： The present invention relates to a maraging steel containing C: 0.02% (means mass %, hereinafter the same) or less, Si: 0.3% or less, Mn: 0.3% or less, Ni: 7.0 to 15.0%, Cr: 5.0% or less, Co: 8.0 to 12.0%, Mo: 0.1 to 2.0%, Ti: 1.0 to 3.0%, and Sol.Al: 0.01 to 0.2%, where the balance includes Fe and unavoidable impurities of P: 0.01% or less, S: 0.01% or less, N: 0.01% or less, and O: 0.01% or less. The parent phase of the maraging steel includes a martensitic phase. The parent phase contains a martensitic phase obtained by reverse transformation from a martensitic phase to an austenitic phase and then transformation from the austenitic phase, in an area fraction of 25% to 75%.