JPH01160103U - - Google Patents
Info
- Publication number
- JPH01160103U JPH01160103U JP5596688U JP5596688U JPH01160103U JP H01160103 U JPH01160103 U JP H01160103U JP 5596688 U JP5596688 U JP 5596688U JP 5596688 U JP5596688 U JP 5596688U JP H01160103 U JPH01160103 U JP H01160103U
- Authority
- JP
- Japan
- Prior art keywords
- valve lifter
- cam
- sliding surface
- valve
- area ratio
- 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
- 229910000734 martensite Inorganic materials 0.000 claims 1
- 239000002244 precipitate Substances 0.000 claims 1
- 230000000052 comparative effect Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 2
- 238000005255 carburizing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Description
第１図はバルブリフタの形状を例示する断面図
、第２図はこの発明の実施例および比較例（ただ
し、比較例５を除く）において採用したバルブリ
フタ粗材に対する熱処理パターンを示す説明図、
第３図はこの考案の実施例および比較例において
採用したバルブリフタ粗材に対する過剰浸炭時間
と遊離炭化物量との関係を例示するグラフ、第４
図は比較例１のバルブリフタの耐久試験（モータ
リング）後の金属組織（塊状白色部が硬質炭化物
で面積率４．１％）を示し、著しいスカツフイン
グ摩耗により表面に白層を有している金属組織を
示す図面代用写真（５００倍）、第５図は比較例
２のバルブリフタの耐久試験（モータリング）後
の金属組織（塊状白色部が硬質炭化物で面積率８
．５％）を示し、スカツフイング摩耗により生じ
た薄い白層を有している金属組織を示す図面代用
写真（５００倍）、第６図はこの発明の実施例１
のバルブリフタの耐久試験（モータリング）後の
金属組織（塊状白色部が硬質炭化物で面積率１１
．４％）を示し、摩耗表面が軽微なスカツフイン
グとなつている金属組織を示す図面代用写真（５
００倍）である。
１……バルブリフタ、１ａ……カムとの摺動面
。
FIG. 1 is a cross-sectional view illustrating the shape of a valve lifter, and FIG. 2 is an explanatory diagram showing a heat treatment pattern for valve lifter rough material adopted in Examples and Comparative Examples (excluding Comparative Example 5) of the present invention.
FIG. 3 is a graph illustrating the relationship between excessive carburizing time and free carbide amount for valve lifter rough materials adopted in the examples and comparative examples of this invention.
The figure shows the metal structure of the valve lifter of Comparative Example 1 after the durability test (motoring) (the lumpy white part is hard carbide and the area ratio is 4.1%), and the metal has a white layer on the surface due to significant scuffing wear. Figure 5 is a photograph (500x) showing the structure of the valve lifter after the durability test (motoring) of the valve lifter of Comparative Example 2.
．． 5%) and a metal structure with a thin white layer caused by scuffing wear.
The metal structure after the durability test (motoring) of the valve lifter (the lumpy white part is hard carbide and the area ratio is 11)
．． 4%) and shows a metal structure with slight scuffing on the worn surface.
00 times). 1...Valve lifter, 1a...Sliding surface with the cam.
Claims (1)
タにおいて、前記カムとの摺動面の表面からその
直下５０μｍまでの範囲に析出硬質炭化物が１０
％以上３０％以下の面積率でマルテンサイトを主
体とする基地に微細分散していることを特徴とす
るバルブリフタ。 In a valve lifter for a valve train equipped with a sliding surface with a cam, hard carbide precipitates in an area up to 50 μm directly below the surface of the sliding surface with the cam.
A valve lifter characterized by being finely dispersed in a base mainly composed of martensite at an area ratio of % to 30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5596688U JPH01160103U (en) | 1988-04-27 | 1988-04-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5596688U JPH01160103U (en) | 1988-04-27 | 1988-04-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01160103U true JPH01160103U (en) | 1989-11-07 |
Family
ID=31281851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5596688U Pending JPH01160103U (en) | 1988-04-27 | 1988-04-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01160103U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6050151A (en) * | 1983-08-29 | 1985-03-19 | Mitsubishi Metal Corp | Fe-base sintered material for sliding member of internal-combustion engine |
| JPS62177151A (en) * | 1986-01-30 | 1987-08-04 | Daido Steel Co Ltd | Material for wear-and pitting-resistant parts |
-
1988
- 1988-04-27 JP JP5596688U patent/JPH01160103U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6050151A (en) * | 1983-08-29 | 1985-03-19 | Mitsubishi Metal Corp | Fe-base sintered material for sliding member of internal-combustion engine |
| JPS62177151A (en) * | 1986-01-30 | 1987-08-04 | Daido Steel Co Ltd | Material for wear-and pitting-resistant parts |
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