JP2011140686A5 - - Google Patents
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- JP2011140686A5 JP2011140686A5 JP2010001385A JP2010001385A JP2011140686A5 JP 2011140686 A5 JP2011140686 A5 JP 2011140686A5 JP 2010001385 A JP2010001385 A JP 2010001385A JP 2010001385 A JP2010001385 A JP 2010001385A JP 2011140686 A5 JP2011140686 A5 JP 2011140686A5
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Cr:1.0%以下、Mo:0.50%以下およびB:0.010%以下からなる群から選択された1種または2種以上
Cr、MoおよびBは、鋼の焼入性を向上させる作用を有し、上記の金属組織を得るのに有効な元素である。したがって、これらの元素の1種または2種以上を含有させてもよい。しかしながら、過剰に含有させても上記作用による効果が飽和して不経済となる。したがって、Cr含有量は1.0%以下、Mo含有量は0.50%以下、B含有量は0.010%以下とする。Cr含有量は好ましくは0.50%以下であり、Mo含有量は好ましくは0.20%以下であり、B含有量は好ましくは0.0030%以下である。上記作用による効果をより確実に得るには、Cr:0.20%以上、Mo:0.05%以上およびB:0.0010%以上のいずれかを満足させることが好ましい。
One or more selected from the group consisting of Cr: 1.0% or less, Mo: 0.50% or less, and B: 0.010% or less Cr, Mo, and B improve the hardenability of steel. It is an element effective in obtaining the above metal structure. Therefore, you may contain 1 type, or 2 or more types of these elements. However, even if it contains excessively, the effect by the said effect | action will be saturated and it will become uneconomical. Therefore, the Cr content is 1.0% or less, the Mo content is 0.50% or less, and the B content is 0.010% or less. The Cr content is preferably 0.50% or less, the Mo content is preferably 0.20% or less, and the B content is preferably 0.0030% or less. In order to more reliably obtain the effect of the above action, it is preferable to satisfy any of Cr: 0.20% or more, Mo: 0.05% or more, and B: 0.0010% or more.
具体的には、実験用熱間圧延機を用いて、Ar3点以上の温度域で6パスの圧延を行い、厚さ2〜3mmに仕上げた。最終1パスの圧下率は、板厚減少率で22〜25%とした。熱間圧延後、水スプレーを使用して種々の冷却条件で650〜720℃まで冷却し、5〜10秒間放冷した後、60℃/sの冷却速度で種々の温度まで冷却してこれを巻取温度とし、同温度に保持された電気加熱炉中に装入して30分間保持した後、20℃/hの冷却速度で室温まで炉冷却して巻取後の徐冷をシミュレートすることにより、熱延鋼板を得た。 Specifically, using an experimental hot rolling mill, 6-pass rolling was performed in a temperature range of 3 or more points of Ar, and finished to a thickness of 2 to 3 mm. The reduction rate of the final pass was 22 to 25% in terms of plate thickness reduction rate. After hot rolling, it is cooled to 650-720 ° C. under various cooling conditions using a water spray, allowed to cool for 5-10 seconds, and then cooled to various temperatures at a cooling rate of 60 ° C./s. The temperature is set to the coiling temperature, charged in an electric heating furnace maintained at the same temperature and held for 30 minutes, and then cooled to room temperature at a cooling rate of 20 ° C./h to simulate slow cooling after winding. As a result, a hot-rolled steel sheet was obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010001385A JP5446885B2 (en) | 2010-01-06 | 2010-01-06 | Cold rolled steel sheet manufacturing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010001385A JP5446885B2 (en) | 2010-01-06 | 2010-01-06 | Cold rolled steel sheet manufacturing method |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2011140686A JP2011140686A (en) | 2011-07-21 |
JP2011140686A5 true JP2011140686A5 (en) | 2012-03-08 |
JP5446885B2 JP5446885B2 (en) | 2014-03-19 |
Family
ID=44456742
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2010001385A Active JP5446885B2 (en) | 2010-01-06 | 2010-01-06 | Cold rolled steel sheet manufacturing method |
Country Status (1)
Country | Link |
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JP (1) | JP5446885B2 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5482513B2 (en) * | 2010-06-30 | 2014-05-07 | 新日鐵住金株式会社 | Cold rolled steel sheet and method for producing the same |
JP5462736B2 (en) * | 2010-07-08 | 2014-04-02 | 株式会社神戸製鋼所 | Manufacturing method of high-strength steel sheet |
RU2560479C1 (en) * | 2011-07-06 | 2015-08-20 | Ниппон Стил Энд Сумитомо Метал Корпорейшн | Cold rolled steel plate |
RU2563397C2 (en) | 2011-07-06 | 2015-09-20 | Ниппон Стил Энд Сумитомо Метал Корпорейшн | Production of cold-rolled steel sheet |
JP5880235B2 (en) * | 2012-04-10 | 2016-03-08 | 新日鐵住金株式会社 | Steel plate manufacturing method |
KR101656977B1 (en) * | 2012-04-10 | 2016-09-12 | 신닛테츠스미킨 카부시키카이샤 | Steel sheet suitable as impact absorbing member, and method for manufacturing same |
JP2013216945A (en) * | 2012-04-10 | 2013-10-24 | Nippon Steel & Sumitomo Metal Corp | Steel sheet and impact absorbing member |
JP5860354B2 (en) * | 2012-07-12 | 2016-02-16 | 株式会社神戸製鋼所 | High-strength hot-dip galvanized steel sheet with excellent yield strength and formability and method for producing the same |
JP5857909B2 (en) * | 2012-08-09 | 2016-02-10 | 新日鐵住金株式会社 | Steel sheet and manufacturing method thereof |
EP2930253B1 (en) | 2012-12-06 | 2019-03-20 | Nippon Steel & Sumitomo Metal Corporation | Steel material and shock-absorbent member and usage thereof |
JP6326837B2 (en) * | 2014-02-03 | 2018-05-23 | 新日鐵住金株式会社 | Cold rolled steel sheet |
KR101858852B1 (en) * | 2016-12-16 | 2018-06-28 | 주식회사 포스코 | Cold-rolled steel sheet and galvanized steel sheet having excelent elonggation, hole expansion ration and yield strength and method for manufacturing thereof |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3911972B2 (en) * | 2000-07-17 | 2007-05-09 | Jfeスチール株式会社 | Manufacturing method of high strength hot-dip galvanized steel sheet |
JP2001226741A (en) * | 2000-02-15 | 2001-08-21 | Kawasaki Steel Corp | High strength cold rolled steel sheet excellent in stretch flanging workability and producing method therefor |
JPWO2004001084A1 (en) * | 2002-06-25 | 2005-10-20 | Jfeスチール株式会社 | High-strength cold-rolled steel sheet and manufacturing method thereof |
CN102242307B (en) * | 2005-08-03 | 2013-03-27 | 住友金属工业株式会社 | Hot-rolled steel sheet and cold-rolled steel sheet and manufacturing method thereof |
JP4539484B2 (en) * | 2005-08-03 | 2010-09-08 | 住友金属工業株式会社 | High strength hot-rolled steel sheet and manufacturing method thereof |
JP5194878B2 (en) * | 2007-04-13 | 2013-05-08 | Jfeスチール株式会社 | High-strength hot-dip galvanized steel sheet excellent in workability and weldability and method for producing the same |
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2010
- 2010-01-06 JP JP2010001385A patent/JP5446885B2/en active Active
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