JPS5684416A - Steel quenching method - Google Patents
Steel quenching methodInfo
- Publication number
- JPS5684416A JPS5684416A JP16057379A JP16057379A JPS5684416A JP S5684416 A JPS5684416 A JP S5684416A JP 16057379 A JP16057379 A JP 16057379A JP 16057379 A JP16057379 A JP 16057379A JP S5684416 A JPS5684416 A JP S5684416A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- ammonia
- transformation point
- quenching
- internal strain
- 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
Links
Landscapes
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
PURPOSE: To quench steel with less internal strain by a method wherein steel is heated to a specific temperature and rapidly cooled in the atmosphere of ammonia or ammonia plus cementation and reduction gas while controlling ammonia gas supply.
CONSTITUTION: A quenching treatment with less internal strain is performed for the surface quenching and hardening of steel machine parts, etc. This treament utilizes a phenomenon that the steel surface is nitrided to lower A1-transformation point and nitrogen is permeated into hypoeutectoid steel in austenite state, then martensite is formed under quenching. Quenching treatment atmosphere uses ammonia gas, or a mixture of ammonia and an organic liquid having cementation and reducing properties, such as alcohol, ester, and ketone, or mixture of ammonia and a neutral gas. While controlling ammonia gas supply, steel is heated to a temperature within 50°C above A1 transformation point and then is quenched, thereby forming high-hardness martensite surface structure. Because A1 transformation point is decreased by the nitrogen permeation, little internal strain due to hiating occurs.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16057379A JPS5684416A (en) | 1979-12-11 | 1979-12-11 | Steel quenching method |
US06/246,049 US4366008A (en) | 1979-02-09 | 1981-03-20 | Method for hardening steel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16057379A JPS5684416A (en) | 1979-12-11 | 1979-12-11 | Steel quenching method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5684416A true JPS5684416A (en) | 1981-07-09 |
Family
ID=15717880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16057379A Pending JPS5684416A (en) | 1979-02-09 | 1979-12-11 | Steel quenching method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5684416A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4470854A (en) * | 1981-10-01 | 1984-09-11 | Kabushiki Kaisha Komatsu Seisakusho | Surface hardening thermal treatment |
US4496401A (en) * | 1981-10-15 | 1985-01-29 | Lucas Industries | Corrosion resistant steel components and method of manufacture thereof |
US5252146A (en) * | 1992-08-24 | 1993-10-12 | Queen's University | Coat-nitrocarburizing of irons and steels |
JP2007046088A (en) * | 2005-08-09 | 2007-02-22 | Yuki Koshuha:Kk | Nitrided quenched part, and method for producing the same |
WO2011115255A1 (en) * | 2010-03-18 | 2011-09-22 | 日本発條株式会社 | Spring steel and surface treatment method for steel material |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52130441A (en) * | 1976-04-27 | 1977-11-01 | Aisin Seiki | Heat surface treatment of products formed of steel sheet |
-
1979
- 1979-12-11 JP JP16057379A patent/JPS5684416A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52130441A (en) * | 1976-04-27 | 1977-11-01 | Aisin Seiki | Heat surface treatment of products formed of steel sheet |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4470854A (en) * | 1981-10-01 | 1984-09-11 | Kabushiki Kaisha Komatsu Seisakusho | Surface hardening thermal treatment |
US4496401A (en) * | 1981-10-15 | 1985-01-29 | Lucas Industries | Corrosion resistant steel components and method of manufacture thereof |
US5252146A (en) * | 1992-08-24 | 1993-10-12 | Queen's University | Coat-nitrocarburizing of irons and steels |
JP2007046088A (en) * | 2005-08-09 | 2007-02-22 | Yuki Koshuha:Kk | Nitrided quenched part, and method for producing the same |
WO2011115255A1 (en) * | 2010-03-18 | 2011-09-22 | 日本発條株式会社 | Spring steel and surface treatment method for steel material |
JPWO2011115255A1 (en) * | 2010-03-18 | 2013-07-04 | 日本発條株式会社 | Spring steel and steel surface treatment method |
JP5632454B2 (en) * | 2010-03-18 | 2014-11-26 | 日本発條株式会社 | Spring steel and steel surface treatment method |
US9469895B2 (en) | 2010-03-18 | 2016-10-18 | Nhk Spring Co., Ltd. | Spring steel and surface treatment method for steel material |
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