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 purposeInfo
- 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
Links
Landscapes
- 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
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)
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 |
-
1987
- 1987-06-23 JP JP15449387A patent/JPS64220A/en active Granted
Cited By (4)
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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