JPS57175038A - Manufacture of ductile cast iron parts - Google Patents
Manufacture of ductile cast iron partsInfo
- Publication number
- JPS57175038A JPS57175038A JP6004281A JP6004281A JPS57175038A JP S57175038 A JPS57175038 A JP S57175038A JP 6004281 A JP6004281 A JP 6004281A JP 6004281 A JP6004281 A JP 6004281A JP S57175038 A JPS57175038 A JP S57175038A
- Authority
- JP
- Japan
- Prior art keywords
- cast iron
- nitrising
- ductile cast
- layer
- iron material
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/02—Pretreatment of the material to be coated
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
PURPOSE:To obtain high strength cast iron parts whose fatigue strength has been elevated, by heating a ductile cast iron material, hot-forging it, forming a ferrite layer on the surface, and after that, performing a soft nitrising treatment. CONSTITUTION:A cast iron material is obtained by casting a ductile cast iron material, hot forging is performed by heating to 800-950 deg.C, and a ferrite layer is formed on the surface. Subsequently, a soft nitrising treatment is performed by a gas soft nitrising method, etc. According to this method, a uniform nitrising layer and a diffusion layer can be obtained, and the inside of the cast iron material is maintained as it is, therefore, its mechanical strength is not obstructed, and it is possible to obtain high strength ductile cast iron parts having a nitriding layer on the surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6004281A JPS57175038A (en) | 1981-04-21 | 1981-04-21 | Manufacture of ductile cast iron parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6004281A JPS57175038A (en) | 1981-04-21 | 1981-04-21 | Manufacture of ductile cast iron parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57175038A true JPS57175038A (en) | 1982-10-27 |
Family
ID=13130617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6004281A Pending JPS57175038A (en) | 1981-04-21 | 1981-04-21 | Manufacture of ductile cast iron parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57175038A (en) |
-
1981
- 1981-04-21 JP JP6004281A patent/JPS57175038A/en active Pending
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