JP2000345286A5 - - Google Patents
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- Publication number
- JP2000345286A5 JP2000345286A5 JP1999161721A JP16172199A JP2000345286A5 JP 2000345286 A5 JP2000345286 A5 JP 2000345286A5 JP 1999161721 A JP1999161721 A JP 1999161721A JP 16172199 A JP16172199 A JP 16172199A JP 2000345286 A5 JP2000345286 A5 JP 2000345286A5
- Authority
- JP
- Japan
- Prior art keywords
- steel
- present
- steels
- ingot
- slab
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000003014 reinforcing Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Description
【００５７】
【実施例】
表１に示す１７種の化学組成の鋼を溶製し、連続鋳造設備による鋳片または真空溶解炉による１５０ｋｇインゴットとした。鋳片の寸法は、厚さ２００ｍｍ、長さ２０００ｍｍで、インゴットは真空溶解炉で溶解して１５０ｋｇインゴットとした。連続鋳造では、表２に示すように、鋳型から引き抜かれた後鋳片内部が凝固する前に鋳片をバルジングさせて圧下および／または電磁撹拌をおこなった。バルジングさせた場合の圧下は一対のロールによりおこなった。
[0057]
【Example】
Steels having 17 chemical compositions shown in Table 1 were melted and made into slabs by a continuous casting facility or 150 kg ingots by a vacuum melting furnace. The size of the slab was 200 mm in thickness and 2000 mm in length, and the ingot was melted in a vacuum melting furnace to form a 150 kg ingot. In the continuous casting, as shown in Table 2, the slab was bulged by being drawn out from the mold and before the inside of the slab was solidified to perform reduction and / or electromagnetic stirring. The reduction in the case of bulging was performed by a pair of rolls.
鋼番号２〜９は、本発明例の鋼である。鋼番号１０〜１８の鋼は、本発明の鋼に対応する比較例であり、主要な強化元素の含有量は同一であるが、Ａｌ、ＴｉおよびＯ（酸素）の含有量が異なっており、本発明で規定する範囲外になっている。 Steel Nos. 2 to 9 are steels of the present invention. Steels of steel numbers 10 to 18 are comparative examples corresponding to the steels of the present invention , and have the same content of the main reinforcing elements, but have different contents of Al, Ti and O (oxygen), It is outside the range specified in the present invention.
鋼板番号３ａおよび７ａ、８ａおよび９ａは、本発明の方法により製造されたものである。これに対して、鋼板番号４ａ、５ａおよび６ａは１５０ｋｇインゴットから鋼板にしたものであり、インゴットのサイズが比較的小さくＭｎ、Ｓの偏析が小さいため母材特性は良好である。 Steel plate numbers 3a and 7a, 8a and 9a were produced by the method of the present invention. On the other hand, the steel sheet numbers 4a, 5a and 6a are steel sheets made from a 150 kg ingot, and the base material characteristics are good because the size of the ingot is relatively small and the segregation of Mn and S is small.
鋼板２a〜９aは、本発明例の鋼板であるが、いずれの溶接方法にて溶接した場合でも優れたＨＡＺ靱性を示す。これに対し、比較例の１０a〜１８aの鋼板のＨＡＺ靱性は、軒並み好ましくない。 The steel plates 2a to 9a are the steel plates of the present invention, but exhibit excellent HAZ toughness when welded by any welding method. On the other hand, the HAZ toughness of the steel sheets of 10a to 18a of the comparative examples is not preferable throughout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16172199A JP4355866B2 (en) | 1999-06-08 | 1999-06-08 | Steel material excellent in welding heat-affected zone characteristics and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16172199A JP4355866B2 (en) | 1999-06-08 | 1999-06-08 | Steel material excellent in welding heat-affected zone characteristics and method for producing the same |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2000345286A JP2000345286A (en) | 2000-12-12 |
| JP2000345286A5 true JP2000345286A5 (en) | 2006-03-02 |
| JP4355866B2 JP4355866B2 (en) | 2009-11-04 |
Family
ID=15740629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16172199A Expired - Fee Related JP4355866B2 (en) | 1999-06-08 | 1999-06-08 | Steel material excellent in welding heat-affected zone characteristics and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4355866B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR122017016259B1 (en) | 2009-05-19 | 2020-11-10 | Nippon Steel Corporation | steel for welded structure |
| TWI365915B (en) | 2009-05-21 | 2012-06-11 | Nippon Steel Corp | Steel for welded structure and producing method thereof |
-
1999
- 1999-06-08 JP JP16172199A patent/JP4355866B2/en not_active Expired - Fee Related
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