JPS558483A - Manufacture of directly heat treated high tension rod - Google Patents

Manufacture of directly heat treated high tension rod

Info

Publication number
JPS558483A
JPS558483A JP8224378A JP8224378A JPS558483A JP S558483 A JPS558483 A JP S558483A JP 8224378 A JP8224378 A JP 8224378A JP 8224378 A JP8224378 A JP 8224378A JP S558483 A JPS558483 A JP S558483A
Authority
JP
Japan
Prior art keywords
rod
cooled
cooling
coils
heat treated
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
Application number
JP8224378A
Other languages
Japanese (ja)
Other versions
JPS6023172B2 (en
Inventor
Takuo Mizoguchi
Shoji Nishimura
Hidenori Miyazaki
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
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP8224378A priority Critical patent/JPS6023172B2/en
Publication of JPS558483A publication Critical patent/JPS558483A/en
Publication of JPS6023172B2 publication Critical patent/JPS6023172B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

PURPOSE: To manufacture titled high strength rod with uniform quality over the entire length, by precooling the rolled rod to a specified temperature for executing the finish rolling , by forcibly cooling to a specified temperature, and by air cooling after coiling to complete the transformation, and then, by naturally cooling after gathering the coils for proceeding the self tempering.
CONSTITUTION: The directly heat treated rod of low alloy steel containing c≤0.4% and one kind or more of Cr, Mo, B, etc., is precooled by the water cooled precooler 2 behind the intermediate mill 1, so as to make the temperature at entrance of the finishing mill to be 600W900°C; after that, the rod is rolled by the finishing mill 3, and is forcibly cooled by the forced cooler to 400W650°; this rod is then coiled. After cioling, the coils are spread on the conveyer and is cooled by the blown air at the average cooling speed above 7°c/s to complete the transformation into the martensitic structure; following to this, the coils are gathered and are naturally cooled at the cooling speed 1.0W0.5°c/s for proceeding the self tempering.
COPYRIGHT: (C)1980,JPO&Japio
JP8224378A 1978-07-05 1978-07-05 Direct heat treatment high tensile strength wire manufacturing method Expired JPS6023172B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8224378A JPS6023172B2 (en) 1978-07-05 1978-07-05 Direct heat treatment high tensile strength wire manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8224378A JPS6023172B2 (en) 1978-07-05 1978-07-05 Direct heat treatment high tensile strength wire manufacturing method

Publications (2)

Publication Number Publication Date
JPS558483A true JPS558483A (en) 1980-01-22
JPS6023172B2 JPS6023172B2 (en) 1985-06-06

Family

ID=13768970

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8224378A Expired JPS6023172B2 (en) 1978-07-05 1978-07-05 Direct heat treatment high tensile strength wire manufacturing method

Country Status (1)

Country Link
JP (1) JPS6023172B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5735639A (en) * 1980-08-08 1982-02-26 Sumitomo Electric Ind Ltd Production of high strength steel wire material
JPS5782432A (en) * 1980-11-08 1982-05-22 Sumitomo Metal Ind Ltd Production of high tensile wire rod
JPS57126913A (en) * 1981-01-27 1982-08-06 Kobe Steel Ltd Production of high-toughness high-strength wire or rod steel
JPS57161037A (en) * 1981-03-31 1982-10-04 Kawasaki Steel Corp Direct working and heat treatment device train for hot rolled wire rod
KR100421733B1 (en) * 1998-12-24 2004-05-20 주식회사 포스코 Carbon dioxide gas arc welding rod wire manufacturing method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5735639A (en) * 1980-08-08 1982-02-26 Sumitomo Electric Ind Ltd Production of high strength steel wire material
JPS5782432A (en) * 1980-11-08 1982-05-22 Sumitomo Metal Ind Ltd Production of high tensile wire rod
JPS57126913A (en) * 1981-01-27 1982-08-06 Kobe Steel Ltd Production of high-toughness high-strength wire or rod steel
JPS57161037A (en) * 1981-03-31 1982-10-04 Kawasaki Steel Corp Direct working and heat treatment device train for hot rolled wire rod
KR100421733B1 (en) * 1998-12-24 2004-05-20 주식회사 포스코 Carbon dioxide gas arc welding rod wire manufacturing method

Also Published As

Publication number Publication date
JPS6023172B2 (en) 1985-06-06

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