JPS6439324A - Production of mechanical parts to be machined after induction hardening - Google Patents
Production of mechanical parts to be machined after induction hardeningInfo
- Publication number
- JPS6439324A JPS6439324A JP19546087A JP19546087A JPS6439324A JP S6439324 A JPS6439324 A JP S6439324A JP 19546087 A JP19546087 A JP 19546087A JP 19546087 A JP19546087 A JP 19546087A JP S6439324 A JPS6439324 A JP S6439324A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- cooling
- induction hardening
- layer part
- steel bars
- 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
- Heat Treatment Of Steel (AREA)
Abstract
PURPOSE:To enable machining as it is after induction hardening by subjecting a middle-carbon steel to rapid cooling and direct hardening right after hot working at a specific temp. then stopping the cooling and allowing the steel to make self-annealing so that the surface layer part is converted to sorbite structure. CONSTITUTION:The middle-carbon steel contg. 0.35-0.60wt.% C is smelted and is hot worked at the finishing temp. specified to an A3 point-A3 point +200 deg.C range. Steel bars, etc., which are cooled to form uniform austenite immediately after the hot working is thereafter directly hardened at >=50 deg.C/sec cooling rate. The cooling is thereafter stopped and the steel material are allowed to make self-annealing in an about 600-200 deg.C range by the heat possessed by the steel materials. The steel bars which are converted to the sorbite structure in the surface layer part down to at least 2mm depth from the surface and to ferrite pearite structure in the inside layer part are thereby obtd. These steel bars do not required a tempering treatment and can be produced into machine parts by induction hardening as they are, then by machining such as turning.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62195460A JPH0672259B2 (en) | 1987-08-05 | 1987-08-05 | Manufacturing method of machine parts machined after induction hardening |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62195460A JPH0672259B2 (en) | 1987-08-05 | 1987-08-05 | Manufacturing method of machine parts machined after induction hardening |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6439324A true JPS6439324A (en) | 1989-02-09 |
JPH0672259B2 JPH0672259B2 (en) | 1994-09-14 |
Family
ID=16341442
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62195460A Expired - Fee Related JPH0672259B2 (en) | 1987-08-05 | 1987-08-05 | Manufacturing method of machine parts machined after induction hardening |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0672259B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5857391A (en) * | 1992-03-02 | 1999-01-12 | Ndc Netzler & Dahlgren Co. Ab | Device for cutting a protective layer away from a material roll |
KR20160071462A (en) | 2013-11-19 | 2016-06-21 | 신닛테츠스미킨 카부시키카이샤 | Rod steel |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5619375A (en) * | 1979-07-25 | 1981-02-24 | Mitsubishi Electric Corp | Electromagnetic coupling device |
-
1987
- 1987-08-05 JP JP62195460A patent/JPH0672259B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5619375A (en) * | 1979-07-25 | 1981-02-24 | Mitsubishi Electric Corp | Electromagnetic coupling device |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5857391A (en) * | 1992-03-02 | 1999-01-12 | Ndc Netzler & Dahlgren Co. Ab | Device for cutting a protective layer away from a material roll |
KR20160071462A (en) | 2013-11-19 | 2016-06-21 | 신닛테츠스미킨 카부시키카이샤 | Rod steel |
US10131965B2 (en) | 2013-11-19 | 2018-11-20 | Nippon Steel & Sumitomo Metal Corporation | Steel bar |
Also Published As
Publication number | Publication date |
---|---|
JPH0672259B2 (en) | 1994-09-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |