JPS5732004A - Valve lifter with wear-resistant cast iron layer on surface - Google Patents
Valve lifter with wear-resistant cast iron layer on surfaceInfo
- Publication number
- JPS5732004A JPS5732004A JP10432980A JP10432980A JPS5732004A JP S5732004 A JPS5732004 A JP S5732004A JP 10432980 A JP10432980 A JP 10432980A JP 10432980 A JP10432980 A JP 10432980A JP S5732004 A JPS5732004 A JP S5732004A
- Authority
- JP
- Japan
- Prior art keywords
- cast iron
- wear
- layer
- valve lifter
- molten metal
- 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
- 229910001018 Cast iron Inorganic materials 0.000 title abstract 6
- 239000002184 metal Substances 0.000 abstract 3
- 229910052751 metal Inorganic materials 0.000 abstract 3
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 abstract 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract 2
- 238000005121 nitriding Methods 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 229910000805 Pig iron Inorganic materials 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 229910000734 martensite Inorganic materials 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229910001562 pearlite Inorganic materials 0.000 abstract 1
- 239000004576 sand Substances 0.000 abstract 1
- 239000006104 solid solution Substances 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
Landscapes
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
PURPOSE: To provide a valve lifter of high hardness, tenacity and mechanical performance, by making a wear-resistant cast iron layer on the surface of the wear- resistance-required part of the valve lifter.
CONSTITUTION: For one embodiment, pig iron having a prescribed composition and obtained from the market is molten at 1450 to 1550°C in a melting furnace such as an electric furnace. The molten metal is poured into the cavity 7 of a sand mold 5 through a runner 6 so that the molten metal solidifies. At that time, the poured molten metal is rapidly cooled for solidification by a chill 8 set at the bottom of the cavity 7 and a carbide containing much carbon in the form of solid solution is crystallized so that a chilled layer 9 is produced on the surface. After that, the chilled cast iron is heated to 800W900°C in oil so that its pearlite is changed into martensite. The cast iron is then tempered at 500W600°C so that its structure is changed into sorbite. The surface of the chilled cast iron is polished to a flat smooth surface. Nitriding is effected to a predetermined depth from the surface in a gas nitriding furnace so that a nitrided layer 10 is produced. An iron oxide layer 11 is made on the surface of the nitrided layer 10 by chemical treatment or the like. This results in providing wear-resistant cast iron containing structure of much crystallized carbide and structure of sorbite.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10432980A JPS5732004A (en) | 1980-07-31 | 1980-07-31 | Valve lifter with wear-resistant cast iron layer on surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10432980A JPS5732004A (en) | 1980-07-31 | 1980-07-31 | Valve lifter with wear-resistant cast iron layer on surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5732004A true JPS5732004A (en) | 1982-02-20 |
Family
ID=14377890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10432980A Pending JPS5732004A (en) | 1980-07-31 | 1980-07-31 | Valve lifter with wear-resistant cast iron layer on surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5732004A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5183846A (en) * | 1975-01-21 | 1976-07-22 | Hino Motors Ltd |
-
1980
- 1980-07-31 JP JP10432980A patent/JPS5732004A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5183846A (en) * | 1975-01-21 | 1976-07-22 | Hino Motors Ltd |
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