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1. 发明专利

JP2010100909A High corrosion-resistant ferritic stainless steel sheet having excellent joint strength, for resistance spot welding 有权
标题翻译：耐腐蚀不锈钢不锈钢板，具有优异的接头强度，用于电阻点焊
公开(公告)号：JP2010100909A
公开(公告)日：2010-05-06
申请号：JP2008274309
申请日：2008-10-24
申请人： Jfe Steel Corp , Jfeスチール株式会社
发明人： FUNAKAWA YOSHIMASA , OKADA SHUJI , ISHII TOMOHIRO , OTA MASAYUKI
IPC分类号： C22C38/00 , C21D9/46 , C22C38/48 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide a high corrosion-resistant ferritic stainless steel sheet wherein a weld joint by resistance spot welding exhibits excellent strength, and to provide a method for producing the same. SOLUTION: A slab having a composition containing, by mass, 0.003 to 0.010% C, ≤0.15% Si, ≤0.2% Mn, ≤0.04% P, ≤0.005% S, ≤0.05% Al, ≤0.010% N, 20 to 23% Cr, 0.3 to 0.6% Cu, ≤0.5% Ni and 0.25 to 0.5% Nb, and the balance Fe with inevitable impurities is heated at 1,000 to 1,200°C, and then subjected to hot rolling in such a manner that finishing temperature is controlled to ≤950°C and coiling temperature is controlled to ≤500°C, and the obtained hot rolled steel sheet is subjected to hot rolled sheet annealing, is further pickled, and is next subjected to cold rolling, and the obtained cold rolled steel sheet is subjected to cold rolled sheet annealing. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种高耐蚀铁素体不锈钢板，其中通过电阻点焊的焊接接头表现出优异的强度，并提供其制造方法。解决方案：具有以质量计含有0.003至0.010％C，≤0.15％Si，≤0.2％Mn，≤0.04％P，≤0.005％S，≤0.05％Al，≤0.010％N的组成的板坯，20〜23％的Cr，0.3〜0.6％的Cu，≤0.5％的Ni和0.25〜0.5％的Nb，余量为Fe的不可避免的杂质在1000〜1200℃下加热，然后以这种方式进行热轧将该终轧温度控制为≤950℃，卷取温度控制在≤500℃，对热轧板进行热轧板退火，进一步酸洗，接着进行冷轧，得到的冷轧钢板进行冷轧板退火。版权所有（C）2010，JPO＆INPIT

2. 发明专利

JP2010023106A Weld metal for stainless steel welded joint, and method for evaluating corrosion resistance thereof 有权
标题翻译：用于不锈钢焊接接头的焊接金属及其耐腐蚀性评估方法
公开(公告)号：JP2010023106A
公开(公告)日：2010-02-04
申请号：JP2008190439
申请日：2008-07-24
申请人： Jfe Steel Corp , Jfeスチール株式会社
发明人： YANO HIROSHI , NAKAMICHI JIRO , OKADA SHUJI , KAWABATA FUMIMARU , OI KENJI , YAMADA KATSUMI
IPC分类号： B23K35/30 , B23K9/23 , B23K31/00 , B23K103/04 , B23K103/18 , C21D9/46 , C22C38/00 , C22C38/50 , G01N17/00 , G01N23/225 , G01N33/20
摘要： PROBLEM TO BE SOLVED: To provide a weld metal having excellent corrosion resistance in a different material welded joint between a ferritic stainless steel sheet and an austenitic stainless steel sheet, and to provide a method for evaluating its corrosion resistance.
SOLUTION: The weld metal for a dissimilar welded joint with stainless steel includes, by mass, 18 to 21% Cr, ≤0.1% Mo, ≤0.5% Cu, 0.03 to 0.25% Nb, ≤0.05% Ti and ≤0.04% N, and in which a difference between the minimum value of the Cr concentration on the ferritic phase side in the grain boundaries or in the vicinities of the grain boundaries and the Cr concentration of the ferritic phase in the mother phase is ≤10 mass%, and also, a difference between the minimum value of the Cr concentration on the austenitic phase side in the vicinities of the grain boundaries and the Cr concentration of the austenitic phase in the mother phase is ≤5 mass%. Also, the method for evaluating the corrosion resistance evaluates corrosion resistance by the difference between the minimum value of the Cr concentration on the ferritic phase side in the grain boundaries or in the vicinities of the grain boundaries and/or the difference between the minimum value of the Cr concentration on the austenitic phase side in the vicinities of the grain boundaries and the Cr concentration of the austenitic phase in the mother phase.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供在铁素体不锈钢板和奥氏体不锈钢板之间的不同材料焊接接头中具有优异耐腐蚀性的焊接金属，并提供一种评价其耐腐蚀性的方法。解决方案：用于不锈钢焊接接头的焊接金属质量分别为18〜21％Cr，≤0.1％Mo，≤0.5％Cu，0.03〜0.25％Nb，≤0.05％Ti，≤0.04 ％N，并且其中在晶界中的铁素体相侧的Cr浓度与晶界附近的Cr浓度与母相的铁素体相的Cr浓度之间的差为≤10质量％，并且在晶界附近的奥氏体相侧的Cr浓度与母相的奥氏体相的Cr浓度的最小值之差为5质量％以下。此外，耐腐蚀性评价方法是通过晶粒边界内的铁素体相侧的Cr浓度的最小值或晶界附近的/ Cr的最小值和在晶界附近的奥氏体相侧的Cr浓度和母相中的奥氏体相的Cr浓度。版权所有（C）2010，JPO＆INPIT

3. 发明专利

JP2008179887A Ferritic stainless steel sheet having excellent corrosion resistance in dissimilar weld with austenitic stainless steel, and method for producing the same 有权
标题翻译：具有奥氏体不锈钢的不锈钢焊接中具有优异耐腐蚀性的不锈钢不锈钢板及其制造方法
公开(公告)号：JP2008179887A
公开(公告)日：2008-08-07
申请号：JP2007332403
申请日：2007-12-25
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： OKADA SHUJI , FUNAKAWA YOSHIMASA , UGI TAKUMI , OTA HIROKI
IPC分类号： C22C38/00 , C21D9/46 , C22C38/48
摘要： PROBLEM TO BE SOLVED: To provide a ferritic stainless steel sheet in which sufficient corrosion resistance can be secured even regarding dissimilar welds with an austenitic stainless steel (e.g., SUS304).
SOLUTION: The ferritic stainless steel has a composition comprising, by mass, ≤0.030% C, ≤0.030% N, ≤0.050% (C+N), ≤0.50% Si, ≤0.50% Mn, >0.010 to 0.060% Al, 20.5 to 22.5% Cr, ≤1.00% Cu, ≤1.5% Ni, 0.40 to 0.70% Nb, ≤0.040% P and ≤0.010% S, and in which these components satisfy the relation in inequality; Nb/(C+N+0.06)≥5, and the balance Fe with inevitable impurities.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种铁素体不锈钢板，即使在与奥氏体不锈钢（例如SUS304）的不同焊缝下也能够确保足够的耐腐蚀性。铁素体系不锈钢的组成为：质量％≤0.030％，N≤0.050％（C + N）≤0.50％Si≤0.50％Mn≤0.030〜0.060％％Al，20.5〜22.5％Cr，≤1.00％Cu，≤1.5％Ni，0.40〜0.70％Nb，≤0.040％P和≤0.010％S，其中这些成分满足不等式关系; Nb /（C + N + 0.06）≥5，余量为Fe与不可避免的杂质。版权所有（C）2008，JPO＆INPIT

4. 发明专利

JP2009068104A Ferritic stainless steel sheet excellent in punchability, and manufacturing method therefor 有权
标题翻译：优质不锈钢板及其制造方法
公开(公告)号：JP2009068104A
公开(公告)日：2009-04-02
申请号：JP2008207752
申请日：2008-08-12
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： FUNAKAWA YOSHIMASA , OKADA SHUJI , ISHII TOMOHIRO , OTA MASAYUKI
IPC分类号： C22C38/00 , B21B3/00 , C21D9/46 , C22C38/42 , C22C38/54
CPC分类号： C22C38/02 , B21B3/02 , C21D1/32 , C21D1/673 , C21D6/002 , C21D8/0436 , C21D8/0473 , C21D2211/004 , C21D2211/005 , C22C38/04 , C22C38/42 , C22C38/48 , C22C38/50
摘要： PROBLEM TO BE SOLVED: To provide a ferritic stainless steel sheet, which can be punched or sheared without forming burrs, and to provide a manufacturing method therefor. SOLUTION: A slab has a composition including 0.0030 to 0.012 mass% of C, 0.13 mass% or less of Si, 0.25 mass% or less of Mn, 0.04 mass% or less of P, 0.005 mass% or less of S, 0.06 mass% or less of Al, 0.0030 to 0.012 mass% of N, 20.5 to 23.5 mass% of Cr, 0.3 to 0.6 mass% of Cu, 0.5 mass% or less of Ni, 0.3 to 0.5 mass% of Nb, 0.05 to 0.15 mass% of Ti, and the balance Fe with unavoidable impurities. The manufacturing method includes the steps of: hot-rolling the slab having the above composition at a finishing temperature of 900°C or higher and at a winding temperature of 400 to 550°C; softening the obtained hot-rolled steel plate; further pickling it; and subsequently cold-rolling the steel plate. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供可以冲压或剪切而不形成毛刺的铁素体不锈钢板，并提供其制造方法。解决方案：板坯具有C：0.0030〜0.012质量％，Si：0.13质量％以下，Mn：0.25质量％以下，P：0.04质量％以下，S：0.005质量％以下，0.06质量％以下的Al，0.0030〜0.012质量％的N，20.5〜23.5质量％的Cr，0.3〜0.6质量％的Cu，0.5质量％以下的Ni，0.3〜0.5质量％的Nb，0.05 至0.15质量％的Ti，余量为Fe，不可避免的杂质。该制造方法包括以下步骤：在900℃或更高的终轧温度和400-550℃的卷取温度下热轧具有上述组成的板坯; 软化得到的热轧钢板; 进一步酸洗它然后冷轧钢板。版权所有（C）2009，JPO＆INPIT

5. 发明专利

JP2009012071A Weld metal of stainless steel weld joint, and its forming method 有权
标题翻译：不锈钢焊接接头焊接金属及其成形方法
公开(公告)号：JP2009012071A
公开(公告)日：2009-01-22
申请号：JP2008149612
申请日：2008-06-06
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： YANO HIROSHI , OKADA SHUJI , KAWABATA FUMIMARU , OI KENJI
IPC分类号： B23K35/30 , B23K9/23 , B23K31/00 , C21D9/46 , C22C38/00 , C22C38/50 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide a weld metal having excellent corrosion resistance to a weld joint of stainless steel, in particular, a weld joint of austenitic stainless steel and ferritic stainless steel, and a method for forming the weld metal.
SOLUTION: The weld metal has a structure containing, by mass, 18-21% Cr, ≤0.1% Mo, ≤0.5% Cu, 0.03-0.2% Ti, ≤0.025%Nb, and ≤0.04% N , and containing Cr, Mo, Si, Nb, Ni, C and Mn so as to satisfy that the Cr equivalent is within a range of 18-25, and the Ni equivalent is within a range of 3-17, wherein the fraction of the austenitic phase is ≥20%, and the C content of the austenitic phase is ≤0.04%.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了提供对不锈钢的焊接接头，特别是奥氏体不锈钢和铁素体不锈钢的焊接接头具有优异耐腐蚀性的焊接金属以及形成焊接金属的方法。解决方案：焊接金属具有质量分数为18-21％Cr，≤0.1％Mo，≤0.5％Cu，0.03-0.2％Ti，≤0.025％Nb和≤0.04％N的结构，含有Cr，Mo，Si，Nb，Ni，C和Mn，以使Cr当量在18〜25的范围内，Ni当量在3〜17的范围内，其中奥氏体相≥20％，奥氏体相的C含量≤0.04％。版权所有（C）2009，JPO＆INPIT

6. 发明专利

JP2008266696A Ferritic stainless steel sheet having excellent weldability to austenitic stainless steel sheet, and its manufacturing method 有权
标题翻译：对奥氏体不锈钢板具有优异的焊接性的铁素体不锈钢板及其制造方法
公开(公告)号：JP2008266696A
公开(公告)日：2008-11-06
申请号：JP2007108785
申请日：2007-04-18
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： FUNAKAWA YOSHIMASA , OKADA SHUJI , UGI TAKUMI , OTA MASAYUKI
IPC分类号： C22C38/00 , B21B3/02 , C21D9/46 , C22C38/28
摘要： PROBLEM TO BE SOLVED: To provide a ferritic stainless steel sheet excellent in weldability to an austenitic stainless steel sheet, particularly corrosion resistance of weld zone, and also to provide its manufacturing method.
SOLUTION: The ferritic stainless steel sheet with excellent weldability to an austenitic stainless steel sheet has a component composition consisting of, by mass, ≤0.012% C, ≤0.3% Si, 0.1 to 0.3% Mn, ≤0.04% P, ≤0.01% S, ≤0.08% Al, ≤0.012% N, ≤0.01% Ti, 0.35 to 0.7% Nb, 20.5 to 23.5% Cr, 0.3 to 0.8% Cu and the balance Fe with inevitable impurities and also has a structure in which CuS is precipitated around MnS with a size of ≤1 μm as a core or precipitated adjacent to MnS with a size of ≤1 μm.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种对奥氏体不锈钢板的焊接性优异的铁素体不锈钢板，特别是焊接区域的耐腐蚀性，并且还提供其制造方法。＆lt; P＆gt;解决方案：对奥氏体不锈钢板具有优异的焊接性的铁素体不锈钢板具有由质量≤0.012％C，≤0.3％Si，0.1〜0.3％Mn，≤0.04％P， ≤0.01％S，≤0.08％Al，≤0.012％N，≤0.01％Ti，0.35〜0.7％Nb，20.5〜23.5％Cr，0.3〜0.8％Cu，余量为Fe和不可避免的杂质， CuS以约1μm的尺寸的MnS沉淀为核心，或者相邻于尺寸≤1μm的MnS析出。版权所有（C）2009，JPO＆INPIT

7. 发明专利

JP2008179885A Ferritic stainless steel sheet having excellent corrosion resistance in dissimilar weld with austenitic stainless steel, and its production method 有权
标题翻译：具有奥氏体不锈钢的不锈钢焊接中具有优异耐腐蚀性的不锈钢不锈钢板及其生产方法
公开(公告)号：JP2008179885A
公开(公告)日：2008-08-07
申请号：JP2007332392
申请日：2007-12-25
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： OKADA SHUJI , FUNAKAWA YOSHIMASA , UGI TAKUMI , YANO HIROSHI , OTA HIROKI
IPC分类号： C22C38/00 , C21D9/46 , C22C38/48
摘要： PROBLEM TO BE SOLVED: To provide a ferritic stainless steel sheet in which sufficient corrosion resistance can be secured even regarding dissimilar welds with an austenitic stainless steel (e.g., SUS304).
SOLUTION: The ferritic stainless steel sheet has a composition comprising, by mass, ≤0.030% C, ≤0.030% N, ≤0.050% (C+N), 0.15 to 0.60% Si, ≤0.50% Mn, ≤0.010% Al, 20.5 to 22.5% Cr, 0.03 to 1.00% Cu, 0.10 to 1.50% Ni, 0.30 to 0.70% Nb, ≤0.040% P and ≤0.010% S, and in which these components satisfy the relation in inequality; Nb/(C+N+0.06)≥4, and the balance Fe with inevitable impurities.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种铁素体不锈钢板，即使在与奥氏体不锈钢（例如SUS304）的不同焊缝下也能够确保足够的耐腐蚀性。铁素体系不锈钢板的组成为：以质量％≤0.030％C，≤0.030％N，≤0.050％（C + N），0.15〜0.60％Si，≤0.50％Mn，≤0.010 ％Al，20.5〜22.5％Cr，0.03〜1.00％Cu，0.10〜1.50％Ni，0.30〜0.70％Nb，≤0.040％P和≤0.010％S，其中这些成分满足不等式关系; Nb /（C + N + 0.06）≥4，余量为Fe与不可避免的杂质。版权所有（C）2008，JPO＆INPIT

8. 发明专利

JP2005240112A Ferritic stainless steel 有权
标题翻译：铁质不锈钢
公开(公告)号：JP2005240112A
公开(公告)日：2005-09-08
申请号：JP2004051956
申请日：2004-02-26
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： OKADA SHUJI , KATO YASUSHI , KASAI MASAYUKI , FURUKIMI OSAMU
IPC分类号： C22C38/00 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide ferritic stainless steel having excellent workability in the weld zone, wherein, even if sequential working by which the temperature of material reaches ≥200°C during the working and exceeding equivalent plastic strain 1, the probability in the generation of cracks in the weld zone is extremely low.
SOLUTION: The ferritic stainless steel having excellent dynamic strain aging resistance in the weld zone has a composition comprising, by mass, ≤0.020% C, ≤1.0% Si, 0.08 to 1.0% Mn, ≤0.040% P, ≤0.010% S, 10.0 to 20.0% Cr, ≤0.60% Ni, ≤0.10% Al, ≤0.020% N, 0.10 to 1.00% Nb, 0.01 to 0.12% Ti and ≤0.0030% B, and in which the contents of Al, N, Nb, Ti and B also satisfy the expression (1) of (1/10.81)×B%+(1/14.01)×N%-(1/92.91)×Nb%/30≤(1/47.87)×Ti%+(1/26.98)×Al%/15.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供在焊接区域具有优异的加工性的铁素体不锈钢，其中即使在加工期间材料的温度达到≥200℃并超过等效塑性应变1的顺序加工，其概率在焊缝区产生裂纹极低。解决方案：焊接区具有优异的动态应变耐老化性的铁素体不锈钢具有以质量计≤0.020％C，≤1.0％Si，0.08〜1.0％Mn，≤0.040％P，≤0.010 ％S，10.0〜20.0％Cr，≤0.60％Ni，≤0.10％Al，≤0.020％N，0.10〜1.00％Nb，0.01〜0.12％Ti和≤0.0030％B，其中Al，N ，Nb，Ti和B也满足（1 / 10.81）×B％+（1 / 14.01）×N％ - （1 / 92.91）×Nb％/30≤（1 / 47.87）×Ti ％+（1 / 26.98）×铝％/ 15。版权所有（C）2005，JPO＆NCIPI

9. 发明专利

JP2009068034A Ferritic stainless steel sheet superior in formability for extension flange, and manufacturing method therefor 有权
标题翻译：铁路不锈钢板材，用于扩展法兰的可制造性及其制造方法
公开(公告)号：JP2009068034A
公开(公告)日：2009-04-02
申请号：JP2007234953
申请日：2007-09-11
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： FUNAKAWA YOSHIMASA , OKADA SHUJI , ISHII TOMOHIRO , OTA MASAYUKI
IPC分类号： C22C38/00 , B21B1/26 , B21B3/02 , C21D9/46 , C22C38/48
摘要： PROBLEM TO BE SOLVED: To provide a ferritic stainless steel sheet having superior corrosion resistance and superior formability for an extension flange, and to provide a manufacturing method therefor. SOLUTION: A slab includes 0.015 mass% or less of C, 0.3 mass% or less of Si, 0.10 to 0.40 mass% of Mn, 0.04 mass% or less of P, 0.008 mass% or less of S, 0.08 mass% or less of Al, 0.015 mass% or less of N, 20.5 to 23.5 mass% of Cr, 0.3 to 0.7 mass% of Cu, 0.5 mass% of Ni, 0.25 to 0.55 mass% of Nb, and the balance Fe with unavoidable impurities. The manufacturing method includes the steps of: producing the above slab; heating the slab to 1,000°C or higher; then hot-rolling the slab at a finishing temperature of 800°C or higher but lower than 1,000°C and at a winding temperature of 500°C or lower; annealing the obtained hot-rolled steel plate at a heating temperature of 900°C or higher for a heating period of 500 seconds or less; further pickling the steel plate; subsequently cold-rolling it; and annealing the obtained cold-rolled steel sheet at a heating temperature of 850°C or higher. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种对延伸法兰具有优异的耐腐蚀性和优异的成形性的铁素体不锈钢板，并提供其制造方法。解决方案：板坯包括C：0.015质量％以下，Si：0.3质量％以下，Mn：0.10〜0.40质量％，P：0.04质量％以下，S：0.008质量％以下，0.08：，Al：0.015质量％以下，Cr：20.5〜23.5质量％，Cu：0.3〜0.7质量％，Ni：0.5质量％，Nb：0.25〜0.55质量％，余量：Fe：杂质。制造方法包括以下步骤：制造上述板坯; 将板坯加热至1000℃以上; 然后在800℃以上且低于1000℃的终轧温度和500℃以下的卷绕温度下热轧板坯。在900℃以上的加热温度下对所得到的热轧钢板退火500秒以下的加热时间; 进一步酸洗钢板; 随后冷轧; 并且在850℃或更高的加热温度下对获得的冷轧钢板退火。版权所有（C）2009，JPO＆INPIT

10. 发明专利

JP2009012070A Weld metal of stainless steel weld joint, and its forming method 有权
标题翻译：不锈钢焊接接头焊接金属及其成形方法
公开(公告)号：JP2009012070A
公开(公告)日：2009-01-22
申请号：JP2008149609
申请日：2008-06-06
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： YANO HIROSHI , OKADA SHUJI , KAWABATA FUMIMARU , OI KENJI
IPC分类号： B23K35/30 , B23K9/23 , B23K31/00 , B23K103/18 , C21D9/46 , C22C38/00 , C22C38/50 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide a weld metal having excellent corrosion resistance to a weld joint between a ferritic stainless steel plate to an austenitic stainless steel plate, and a method for forming the weld metal.
SOLUTION: The weld metal of a stainless steel weld joint has a structure containing, by mass, 18-21% Cr, ≤0.1% Mo, ≤0.5% Cu, 0.03-0.25% Nb, ≤0.05%Ti, and ≤0.04% N, and containing Cr, Mo, Si, Nb, Ni, C and Mn so as to satisfy that the Cr equivalent calculated by (1) Cr eq. =[%Cr]+[%Mo]+1.5[%Si]+0.5[%Nb] is within a range of 18-25, and the Ni equivalent calculated by (2) Ni eq. =[%Ni]+30[%C]+0.5[%Mn] is within a range of 3-17, wherein the fraction of the austenitic phase is ≥20%, and the C content of the austenitic phase is ≤0.08%.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供对奥氏体不锈钢板的铁素体不锈钢板之间的焊接接头具有优异的耐腐蚀性的焊接金属和形成焊接金属的方法。解决方案：不锈钢焊接接头的焊缝金属具有质量分数为18-21％Cr，≤0.1％Mo，≤0.5％Cu，0.03-0.25％Nb，≤0.05％Ti和 ≤0.04％N，并含有Cr，Mo，Si，Nb，Ni，C和Mn，以满足由（1）Cr eq计算的Cr当量。 = [％Cr] + [％Mo] +1.5 [％Si] +0.5 [％Nb]在18〜25的范围内，Ni当量由（2）Ni eq = [％Ni] +30 [％C] +0.5 [％Mn]在3-17的范围内，其中奥氏体相的分数≥20％，奥氏体相的C含量≤0.08％。版权所有（C）2009，JPO＆INPIT

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