JPS6487720A - Heat treatment for rail - Google Patents

Heat treatment for rail

Info

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
Application number
JP24413787A
Other languages
Japanese (ja)
Inventor
Keiji Fukuda
Hideaki Kageyama
Michiaki Ishii
Yoshiaki Makino
Manabu Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP24413787A priority Critical patent/JPS6487720A/en
Publication of JPS6487720A publication Critical patent/JPS6487720A/en
Pending legal-status Critical Current

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  • Heat Treatment Of Articles (AREA)

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.
JP24413787A 1987-09-30 1987-09-30 Heat treatment for rail Pending JPS6487720A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009153835A (en) * 2007-12-27 2009-07-16 Kao Corp Absorbent articles
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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009153835A (en) * 2007-12-27 2009-07-16 Kao Corp Absorbent articles
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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