JPS55125227A - Toughening method of small steel member for case hardening - Google Patents
Toughening method of small steel member for case hardeningInfo
- Publication number
- JPS55125227A JPS55125227A JP3311179A JP3311179A JPS55125227A JP S55125227 A JPS55125227 A JP S55125227A JP 3311179 A JP3311179 A JP 3311179A JP 3311179 A JP3311179 A JP 3311179A JP S55125227 A JPS55125227 A JP S55125227A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- case hardening
- carburizing
- carbo
- nitriding
- 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
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
PURPOSE: To toughen steel material for case hardening by subjecting said material to carburizing or carbo-nitriding and hardening at the specific temperatures at the heat-treating of a small member made of the steel material for case hardening.
CONSTITUTION: The small part such as engraving and printing bar or the like produced of case hardening steel is heated to 900W930°C in a CO gas or CH4 gas atmosphere, whereby it is subjected to carburizing. In the case of making carbo- nitriding, NH3 gas or C2N2 gas is mixed in said CO or CH4 gas and the mixed gases are used. The small part having been subjected to carburizing or carbo- nitriding is cooled down to a temperature range from 650W730°C, after which it is put in oil or water of 30W150°C to be quench-hardened. The surface hardness is as extremely hard as about HV800 and the inside is soft as HV280W300 at 0.4W 0.6mm, thus the properties of superior toughenss are provided.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3311179A JPS5948954B2 (en) | 1979-03-20 | 1979-03-20 | Method for strengthening small steel parts for case hardening |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3311179A JPS5948954B2 (en) | 1979-03-20 | 1979-03-20 | Method for strengthening small steel parts for case hardening |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55125227A true JPS55125227A (en) | 1980-09-26 |
JPS5948954B2 JPS5948954B2 (en) | 1984-11-29 |
Family
ID=12377538
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3311179A Expired JPS5948954B2 (en) | 1979-03-20 | 1979-03-20 | Method for strengthening small steel parts for case hardening |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5948954B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58189368A (en) * | 1982-04-28 | 1983-11-05 | Toyota Motor Corp | High-strength pinion for steering and its manufacture |
KR20030054284A (en) * | 2001-12-24 | 2003-07-02 | 주식회사 포스코 | Bearing steel and its heat treatment method for eliminating surface micro crack formation during surface hardening heat treatment |
CN1295352C (en) * | 2004-05-31 | 2007-01-17 | 张胜才 | Alloy/high alloy cemental steel cementing quenching method in low-carbon |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140152801A1 (en) | 2009-10-28 | 2014-06-05 | Alentic Microscience Inc. | Detecting and Using Light Representative of a Sample |
-
1979
- 1979-03-20 JP JP3311179A patent/JPS5948954B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58189368A (en) * | 1982-04-28 | 1983-11-05 | Toyota Motor Corp | High-strength pinion for steering and its manufacture |
JPH0248619B2 (en) * | 1982-04-28 | 1990-10-25 | Toyota Motor Co Ltd | |
KR20030054284A (en) * | 2001-12-24 | 2003-07-02 | 주식회사 포스코 | Bearing steel and its heat treatment method for eliminating surface micro crack formation during surface hardening heat treatment |
CN1295352C (en) * | 2004-05-31 | 2007-01-17 | 张胜才 | Alloy/high alloy cemental steel cementing quenching method in low-carbon |
Also Published As
Publication number | Publication date |
---|---|
JPS5948954B2 (en) | 1984-11-29 |
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