JPS6487720A - Heat treatment for rail - Google Patents
Heat treatment for railInfo
- Publication number
- JPS6487720A JPS6487720A JP24413787A JP24413787A JPS6487720A JP S6487720 A JPS6487720 A JP S6487720A JP 24413787 A JP24413787 A JP 24413787A JP 24413787 A JP24413787 A JP 24413787A JP S6487720 A JPS6487720 A JP S6487720A
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- rail
- railhead
- refrigerant
- sprayed
- 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.)
- Pending
Links
Abstract
PURPOSE:To form the whole cross section of a rail into stable structure and also to prevent the abrupt rising of hardness in the vicinity of a railhead surface by allowing cooling nozzles to approach the railhead surface as cooling proceeds and also increasing the amount of refrigerant to be sprayed. CONSTITUTION:At the time of cooling a high-temperature rail 1, a refrigerant is sprayed by using railhead surface-cooling nozzles 3 and railhead side surface- cooling nozzles 7, controlled cooling is continued until pearlite transformation in the railhead of the rail 1 is completed. Slow cooling is carried out in the initial stage, and cooling is intensified with the lapse of cooling time. Controlled cooling is carried out by fixing the amount of refrigerant to be sprayed and reducing the distances between the cooling nozzles 3, 7 and the railhead surface of the rail 1, or by fixing nozzle distances and increasing the amount of refrigerant to be sprayed via a common adjusting valve 5, or by operating both procedures simultaneously. By this method, a high-strength rail in which hardness is increased to the depth of the inside of the railhead 1 of the rail 1 can be manufactured.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24413787A JPS6487720A (en) | 1987-09-30 | 1987-09-30 | Heat treatment for rail |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24413787A JPS6487720A (en) | 1987-09-30 | 1987-09-30 | Heat treatment for rail |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6487720A true JPS6487720A (en) | 1989-03-31 |
Family
ID=17114310
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24413787A Pending JPS6487720A (en) | 1987-09-30 | 1987-09-30 | Heat treatment for rail |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6487720A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009153835A (en) * | 2007-12-27 | 2009-07-16 | Kao Corp | Absorbent article |
CN102643971A (en) * | 2012-04-12 | 2012-08-22 | 东北大学 | Online thermal treatment device for heavy rail |
KR20180066044A (en) | 2015-10-07 | 2018-06-18 | 카오카부시키가이샤 | Sheet-shaped object and method for producing sheet-shaped object |
KR20180066045A (en) | 2015-10-07 | 2018-06-18 | 카오카부시키가이샤 | Sheet and method for manufacturing sheet |
CN113416818A (en) * | 2021-05-12 | 2021-09-21 | 包头钢铁(集团)有限责任公司 | Heat treatment process of high-strength and high-toughness bainite/martensite multiphase bainite steel rail |
-
1987
- 1987-09-30 JP JP24413787A patent/JPS6487720A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009153835A (en) * | 2007-12-27 | 2009-07-16 | Kao Corp | Absorbent article |
CN102643971A (en) * | 2012-04-12 | 2012-08-22 | 东北大学 | Online thermal treatment device for heavy rail |
KR20180066044A (en) | 2015-10-07 | 2018-06-18 | 카오카부시키가이샤 | Sheet-shaped object and method for producing sheet-shaped object |
KR20180066045A (en) | 2015-10-07 | 2018-06-18 | 카오카부시키가이샤 | Sheet and method for manufacturing sheet |
CN113416818A (en) * | 2021-05-12 | 2021-09-21 | 包头钢铁(集团)有限责任公司 | Heat treatment process of high-strength and high-toughness bainite/martensite multiphase bainite steel rail |
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