JP5009131B2 - 焼付硬化性鋼板 - Google Patents
焼付硬化性鋼板 Download PDFInfo
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- JP5009131B2 JP5009131B2 JP2007288587A JP2007288587A JP5009131B2 JP 5009131 B2 JP5009131 B2 JP 5009131B2 JP 2007288587 A JP2007288587 A JP 2007288587A JP 2007288587 A JP2007288587 A JP 2007288587A JP 5009131 B2 JP5009131 B2 JP 5009131B2
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Description
(1)質量%で、C:0.0050%以下、Si:0.05%以下、Mn:1.0%以下、P:0.08%以下、S:0.02%以下、sol.Al:0.002%以上0.1%以下、N:0.0030%以下であり、Ti含有量を下記(1)式を満たす条件とし、B:0.0025%以下とV:0.02%以下を下記(2)式及び(4)式を満たすように含有し、Nb含有量が下記(3)式を満たし、
Ti ≦ 48/14×N (1)
(N+0.0005)/14−Ti/48 ≦ B/11+V/51 (2)
0.0003 ≦ C−12/93×Nb ≦ 0.0025 (3)
4.7 ≦ V/B (4)
さらに、Cu:0.06%以下、Ni:0.06%以下、Cr:0.06%以下の1種又は2種以上を含有することを特徴とする焼付硬化性鋼板。
ただし、Tiはsol.Tiを意味し、(1)〜(4)式でTi、N、B、V、C、Nbはそれぞれの元素の含有量(質量%)を示す。
また、Ti含有量の上限は、TiをNとの当量以上に含有すると硫化物を形成したり炭化物となって延性及び二次加工性を劣化させたり、焼付硬化性の制御を困難にするので、Nの当量以下の含有量としている。
Ti ≦ 48/14×N (1)
(N+0.0005)/14−Ti/48 ≦ B/11+V/51 (2)
0.0003 ≦ C−12/93×Nb ≦ 0.0025 (3)
4.7 ≦ V/B (4)
Claims (1)
- 質量%で、C:0.0050%以下、Si:0.05%以下、Mn:1.0%以下、P:0.08%以下、S:0.02%以下、sol.Al:0.002%以上0.1%以下、N:0.0030%以下であり、
Ti含有量を下記(1)式を満たす条件とし、
B:0.0025%以下とV:0.02%以下を下記(2)式及び(4)式を満たすように含有し、
Nb含有量が下記(3)式を満たし、
Ti ≦ 48/14×N (1)
(N+0.0005)/14−Ti/48 ≦ B/11+V/51 (2)
0.0003 ≦ C−12/93×Nb ≦ 0.0025 (3)
4.7 ≦ V/B (4)
さらに、Cu:0.06%以下、Ni:0.06%以下、Cr:0.06%以下の1種又は2種以上を含有することを特徴とする焼付硬化性鋼板。
ただし、Tiはsol.Tiを意味し、(1)〜(4)式でTi、N、B、V、C、Nbはそれぞれの元素の含有量(質量%)を示す。
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JP2007288587A JP5009131B2 (ja) | 2007-11-06 | 2007-11-06 | 焼付硬化性鋼板 |
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JP2007288587A JP5009131B2 (ja) | 2007-11-06 | 2007-11-06 | 焼付硬化性鋼板 |
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JP2009114495A JP2009114495A (ja) | 2009-05-28 |
JP5009131B2 true JP5009131B2 (ja) | 2012-08-22 |
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JP2007288587A Active JP5009131B2 (ja) | 2007-11-06 | 2007-11-06 | 焼付硬化性鋼板 |
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JP2830745B2 (ja) * | 1994-07-21 | 1998-12-02 | 株式会社神戸製鋼所 | 表面性状の優れた焼付硬化型冷延鋼板の製造方法 |
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