JPS5747868A - Heat treatment of steel - Google Patents
Heat treatment of steelInfo
- Publication number
- JPS5747868A JPS5747868A JP12172580A JP12172580A JPS5747868A JP S5747868 A JPS5747868 A JP S5747868A JP 12172580 A JP12172580 A JP 12172580A JP 12172580 A JP12172580 A JP 12172580A JP S5747868 A JPS5747868 A JP S5747868A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- hardening
- carried out
- nitrogen
- reheating
- 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
- 229910000831 Steel Inorganic materials 0.000 title abstract 4
- 239000010959 steel Substances 0.000 title abstract 4
- 238000010438 heat treatment Methods 0.000 title 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 6
- 238000000034 method Methods 0.000 abstract 6
- 229910052757 nitrogen Inorganic materials 0.000 abstract 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 2
- 229910001566 austenite Inorganic materials 0.000 abstract 2
- 150000001875 compounds Chemical class 0.000 abstract 2
- 229910052802 copper Inorganic materials 0.000 abstract 2
- 239000010949 copper Substances 0.000 abstract 2
- 238000007747 plating Methods 0.000 abstract 2
- 238000003303 reheating Methods 0.000 abstract 2
- 238000005452 bending Methods 0.000 abstract 1
- 238000005255 carburizing Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000005121 nitriding Methods 0.000 abstract 1
- 238000005480 shot peening Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
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
- C23C8/80—After-treatment
-
- 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
- C23C8/06—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 using gases
- C23C8/34—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 using gases more than one element being applied in more than one step
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
PURPOSE:To obtain a steel with superior pitting resistance by preventing a surface high residual austenite layer from being made thicker by a specified heat treating method. CONSTITUTION:1) A carburizing and air cooling process where an ordinary case hardening steel is carburized in order to obtain a hardening depth corresponding to the load surface pressure and bending stress. 2) A soft-nitriding process where the surface nitrogen content is increased. The thickness of the resulting compound layer is adjusted to <= about 10mum, and the process is carried out at about 500- 630 deg.C. 3) A copper plating process which is carried out since most of nitrogen is released from the surface and nitrogen does not remain effectively when the steel is not plated. 4) A reheating and hardening process where hardening is carried out by reheating and holding for a suitable time enough to convert the compound layer into a solid soln. and not making the residual austenite layer thicker. 5) A shot peening process where the copper plating is removed by peeling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12172580A JPS5747868A (en) | 1980-09-04 | 1980-09-04 | Heat treatment of steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12172580A JPS5747868A (en) | 1980-09-04 | 1980-09-04 | Heat treatment of steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5747868A true JPS5747868A (en) | 1982-03-18 |
Family
ID=14818329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12172580A Pending JPS5747868A (en) | 1980-09-04 | 1980-09-04 | Heat treatment of steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5747868A (en) |
-
1980
- 1980-09-04 JP JP12172580A patent/JPS5747868A/en active Pending
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