JPS64220A - Production of hot forged and non-tempered parts for machine structural purpose - Google Patents

Production of hot forged and non-tempered parts for machine structural purpose

Info

Publication number
JPS64220A
JPS64220A JP15449387A JP15449387A JPS64220A JP S64220 A JPS64220 A JP S64220A JP 15449387 A JP15449387 A JP 15449387A JP 15449387 A JP15449387 A JP 15449387A JP S64220 A JPS64220 A JP S64220A
Authority
JP
Japan
Prior art keywords
machine structural
parts
tempered
cast
hot forged
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
JP15449387A
Other languages
Japanese (ja)
Other versions
JPH01220A (en
JPH0559964B2 (en
Inventor
Hirotada Takada
Yoshiro Koyasu
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 JP15449387A priority Critical patent/JPS64220A/en
Publication of JPH01220A publication Critical patent/JPH01220A/en
Publication of JPS64220A publication Critical patent/JPS64220A/en
Publication of JPH0559964B2 publication Critical patent/JPH0559964B2/ja
Granted legal-status Critical Current

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  • Forging (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

PURPOSE: To inexpensively produce non-tempered parts for machine structural purposes which have high strength and toughness by subjecting an ingot having the specific compsn. consisting of S, Si, Mn, Cr, V, T, Al, N, and Fe to quick cooling and hot forging, then to a specific heat treatment.
CONSTITUTION: The steel which contains 0.18W0.50wt.% C, 0.10W1.00% Si, 0.50W2.00% Mn, 0.10W1.00% Cr, ≤0.20% V, 0.005W0.05% Ti, 0.005W0.050% Al, and 0.005W0.025% N, consists of the balance Fe and inevitable impurities and contains 0.70W1.15% carbon equiv. Ceq=C+Mn/5+Si/7+Cr/9+1.54V is smelted by an ordinary method. Such molten steel is cast by a continuous casting machine. The molten steel is cast and cooled at ≥20°C/min cooling rate from the solidification point down to 1,000°C at this time. The resultant ingot is thereafter heated down to 1,280°C without being rolled and is made into mechanical parts at ≥6 reduction ratio by hot forging. The molded articles are thereafter cooled at 0.5W5°C/sec cooling rate from the working temp. down to the Ar1 transformation point by which the hot forged and non-tempered parts for machine structural purposes are obtd.
COPYRIGHT: (C)1989,JPO&Japio
JP15449387A 1987-06-23 1987-06-23 Production of hot forged and non-tempered parts for machine structural purpose Granted JPS64220A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15449387A JPS64220A (en) 1987-06-23 1987-06-23 Production of hot forged and non-tempered parts for machine structural purpose

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15449387A JPS64220A (en) 1987-06-23 1987-06-23 Production of hot forged and non-tempered parts for machine structural purpose

Publications (3)

Publication Number Publication Date
JPH01220A JPH01220A (en) 1989-01-05
JPS64220A true JPS64220A (en) 1989-01-05
JPH0559964B2 JPH0559964B2 (en) 1993-09-01

Family

ID=15585450

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15449387A Granted JPS64220A (en) 1987-06-23 1987-06-23 Production of hot forged and non-tempered parts for machine structural purpose

Country Status (1)

Country Link
JP (1) JPS64220A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06340946A (en) * 1990-08-03 1994-12-13 Samsung Heavy Ind Co Ltd Non-tempered steel with high toughness and preparation thereof
KR20020053670A (en) * 2000-12-27 2002-07-05 이계안 A alloy steel for automobile knuckle and preparing method thereof
JP2006123890A (en) * 2004-10-01 2006-05-18 Jtekt Corp Rolling bearing device and its manufacturing method
US8735748B2 (en) 2009-07-07 2014-05-27 Oki Electric Industry Co., Ltd. Keyboard structure

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06340946A (en) * 1990-08-03 1994-12-13 Samsung Heavy Ind Co Ltd Non-tempered steel with high toughness and preparation thereof
KR20020053670A (en) * 2000-12-27 2002-07-05 이계안 A alloy steel for automobile knuckle and preparing method thereof
JP2006123890A (en) * 2004-10-01 2006-05-18 Jtekt Corp Rolling bearing device and its manufacturing method
US8735748B2 (en) 2009-07-07 2014-05-27 Oki Electric Industry Co., Ltd. Keyboard structure

Also Published As

Publication number Publication date
JPH0559964B2 (en) 1993-09-01

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