JPH02159345A - Wear resistant spheroidal graphite cast iron - Google Patents
Wear resistant spheroidal graphite cast ironInfo
- Publication number
- JPH02159345A JPH02159345A JP31310088A JP31310088A JPH02159345A JP H02159345 A JPH02159345 A JP H02159345A JP 31310088 A JP31310088 A JP 31310088A JP 31310088 A JP31310088 A JP 31310088A JP H02159345 A JPH02159345 A JP H02159345A
- Authority
- JP
- Japan
- Prior art keywords
- cast iron
- camshaft
- spheroidal graphite
- graphite cast
- wear resistant
- 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
- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 8
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 9
- 239000010962 carbon steel Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract 2
- 230000006698 induction Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- 238000001000 micrograph Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 229910000968 Chilled casting Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 210000003323 beak Anatomy 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は耐摩耗性球状黒鉛鋳鉄（ＦＣＤ材）に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to wear-resistant spheroidal graphite cast iron (FCD material).
例えば、第４図斜視図に示すようなエンジンのカムシャ
フトは耐摩耗が要求されるので、−船釣に炭素鋼を高周
波焼入れしたり、チル鋳物を採用したり、チル鋳物を火
炎焼入れしたりして作られている。For example, since the camshaft of an engine as shown in the perspective view of Figure 4 is required to be wear resistant, - For boat fishing, carbon steel may be induction hardened, chilled casting may be used, or chilled casting may be flame hardened. It is made by
チル鋳物は耐摩耗性に優れているが、旋盤加工が不可能
であり、直接研磨加工により仕上げなければならないと
いう事情もあって、炭素鋼の高周波焼入れによるカムシ
ャフトが広＜使用さ枕ているが、この種のカムシャフト
は耐１７耗性が若干劣るという欠点がある。Chilled castings have excellent wear resistance, but they cannot be machined with a lathe and must be finished by direct polishing, so camshafts made of induction hardened carbon steel are not widely used. However, this type of camshaft has the disadvantage that its wear resistance is slightly inferior.
本発明はこのような事情に鑑みて提案されたもので、炭
素鋼を高周波焼入れすることで、耐摩耗部品を製造する
生産工程にて容易に採用ができるように旋削加工可能で
あり、しかも炭素鋼よりも優れた耐摩耗性を有する耐摩
耗性球状黒鉛鋳鉄を提供することを目的とする。The present invention was proposed in view of these circumstances, and by induction hardening carbon steel, it can be turned and processed so that it can be easily adopted in the production process of manufacturing wear-resistant parts. The purpose is to provide a wear-resistant spheroidal graphite cast iron that has better wear resistance than steel.
そのために本発明は、０．０４〜０．１０％のＢの添加
量と２．１〜２．３５％のＳｉ含有量とを有することを
特徴とする。To this end, the present invention is characterized by having an added amount of B of 0.04 to 0.10% and a Si content of 2.1 to 2.35%.
Ｃ作用〕
このような構成によれば、特殊炭化物面積率が６〜１５
％となり、カムシャフト等に最適の耐摩耗性球状黒鉛鋳
鉄が得られる。C action] According to such a configuration, the special carbide area ratio is 6 to 15
%, resulting in wear-resistant spheroidal graphite cast iron that is ideal for camshafts, etc.
本発明をカムシャフトに通用した一実施例を図面につい
て説明すると、第１図は本発明金属のＢ添加率と特殊炭
化物面積率との関係を示す線図、第２図、第３図はそれ
ぞれＳｉ１．９％ Ｓｉ２．２５％のＦＣＤクランクシ
ャフトの組織を示す顕微鏡写真である。An embodiment in which the present invention is applied to a camshaft will be explained with reference to the drawings. Figure 1 is a diagram showing the relationship between the B addition rate of the metal of the present invention and the special carbide area ratio, and Figures 2 and 3 are respectively It is a micrograph showing the structure of an FCD crankshaft of 1.9% Si and 2.25% Si.
本発明では、耐摩耗性及び旋削性の両面からＦＣＤに対
するＢの添加率とその特殊炭化物面積率との間には、第
１図に示す関係が認められるので、この関係に基づいて
炭化物面積率を６〜１５％にするためにＢ添加率を０．
０４〜０．１０％とする。In the present invention, since the relationship shown in FIG. 1 is recognized between the addition rate of B to FCD and its special carbide area rate from both wear resistance and machinability, based on this relationship, the carbide area rate is The B addition rate is set to 0.
04 to 0.10%.
これは、これまでの試験実績に基づくもので、試験の際
の取鍋添加の工程及びカウントハック分析精度を０．０
１５％と推定し、試験は±０．０２０％（０，０４５〜
０．０８５％）の範囲で行った。なお試験材料の化学成
分は下記の通りである。This is based on past test results, and the accuracy of the ladle addition process and count hack analysis during the test was 0.0.
Estimated to be 15%, the test is ±0.020% (0,045~
0.085%). The chemical components of the test materials are as follows.
ＣＳｉ Ｍｎ Ｃｕ Ｍｏ Ｍｇ
３．７５ ２．２〜２．３ ０．６５ ０．９０ ０．
１ ０．０３５Ｂ添加率が０．０４％を下回わると耐摩
耗性が低下し、０．１０％を越えると旋削性つまり加工
性が低下する。CSi Mn Cu Mo Mg
3.75 2.2-2.3 0.65 0.90 0.
1 When the addition rate of 0.035B is less than 0.04%, wear resistance decreases, and when it exceeds 0.10%, turning performance, that is, workability decreases.
ここで、ＢはＦＣＤ組織の黒鉛球状化を阻害する作用を
行う成分であるとともに、特殊炭化物のチル化傾向を促
進する作用を行うので、この点を考慮に入れてＳｉ含有
９の範囲を２．１０〜２．３５％とする。Here, B is a component that acts to inhibit the graphite spheroidization of the FCD structure, and also acts to promote the chilling tendency of special carbides, so taking this into consideration, the range of Si content 9 is set to 2. .10 to 2.35%.
因みに、Ｓｉ１．９０％のＦＣＤカムシャフトの組織は
、第２図顕微鏡写真（倍率１００）に示すように、Ｂに
よる特殊炭化物のチル化の１頃向がかなり認められるが
、Ｓｉ２．２５％のＦＣＤカムシャフトでは、第３図顕
微鏡写真（倍率１００）に示すように、黒鉛の球状化が
認められるとともに、特殊炭化物のチル化傾向の消滅が
認められる。Incidentally, in the structure of the FCD camshaft with 1.90% Si, as shown in the micrograph in Figure 2 (magnification: 100), the chilling of special carbides by B can be seen considerably, but with the structure of the FCD camshaft with 2.25% Si. In the FCD camshaft, as shown in the micrograph in Figure 3 (magnification: 100), spheroidization of graphite is observed, and disappearance of the chilling tendency of special carbides is observed.
以上述べた範囲のＢ及びＳｉを含有するＦＣＤ鋳鉄で作
られたカムシャフトは旋削が可能であるから、７ｆｉ加
工にて所要の寸法に仕上げることができる。Since a camshaft made of FCD cast iron containing B and Si in the ranges described above can be turned, it can be finished to the required dimensions by 7fi processing.
こうして旋盤加工されたカムシャフトは表面焼入れが行
われて硬化されたのち、研磨加工により仕上げられる。The camshaft thus lathed is surface hardened and hardened, and then finished by polishing.
従って、本発明に係るカムシャフトは従来の炭素鋼の焼
入れによるカムシャフトの生産ラインにて容易に製作す
ることが可能である。Therefore, the camshaft according to the present invention can be easily manufactured on a conventional production line for camshafts using hardened carbon steel.
こうして作られたカムシャフトは従来の炭素鋼の焼入れ
により作られたものに比べてかなり大きな耐摩耗性を有
するので、その耐久力が増加する。Camshafts made in this way have significantly greater wear resistance than those made by conventional hardening of carbon steel, thereby increasing their durability.
このようなＦＣＤによれば、耐摩耗性が大きく、しかも
旋削可能であるから、カムシャフトカム、シリンダーラ
イナー等の耐摩耗性材として有益である。Such an FCD has high wear resistance and can be turned, so it is useful as a wear-resistant material for camshaft cams, cylinder liners, etc.
要するに本発明によれば、０．０４〜０．１０％のＢの
添加量と２．１〜２．３５％のＳｉ含有量とを有するこ
とにより、炭素鋼を高周波焼入れすることで、耐摩耗部
品を製造する生産工程にて容易に採用ができるように旋
削加工可能であり、しかも炭素鋼よりも優れた耐摩耗性
を有する耐摩耗性球状黒鉛鋳鉄を得るから、本発明は産
業上極めて有益なものである。In short, according to the present invention, carbon steel is induction hardened by having an added amount of B of 0.04 to 0.10% and a Si content of 2.1 to 2.35%, thereby making it resistant to wear. The present invention is extremely useful industrially because it provides wear-resistant spheroidal graphite cast iron that can be turned and has better wear resistance than carbon steel so that it can be easily adopted in the production process of manufacturing parts. It is something.
第１図は本発明鋳鉄におけるＢ添加量とその特殊炭化物
面積率との関係を示す線図、第２図、第３図はそれぞれ
Ｓｉ１．９％、Ｓｉ２．２５％のＦＣＤクランクシャフ
トの組織を示す顕微鏡写真である。
第４図は公知のカムシャフトを示す斜視図である。
１・・・カムシャフト。
出願人 三菱自動車工業株式会社
代理人 弁理士 塚 本 正 文
Ｂ ンｋｊｊＯ嘴を
手続補正書Figure 1 is a diagram showing the relationship between the amount of B added and the special carbide area ratio in the cast iron of the present invention, and Figures 2 and 3 show the structures of FCD crankshafts with 1.9% Si and 2.25% Si, respectively. FIG. FIG. 4 is a perspective view of a known camshaft. 1...Camshaft. Applicant Mitsubishi Motors Corporation Representative Patent Attorney Masafumi Tsukamoto B NkjjO Beak Procedural Amendment
Claims (1)
％のＳｉ含有量とを有することを特徴とする耐摩耗性球
状黒鉛鋳鉄。Addition amount of B from 0.04 to 0.10% and from 2.1 to 2.35
A wear-resistant spheroidal graphite cast iron characterized in that it has a Si content of %.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31310088A JPH02159345A (en) | 1988-12-12 | 1988-12-12 | Wear resistant spheroidal graphite cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31310088A JPH02159345A (en) | 1988-12-12 | 1988-12-12 | Wear resistant spheroidal graphite cast iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02159345A true JPH02159345A (en) | 1990-06-19 |
Family
ID=18037159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31310088A Pending JPH02159345A (en) | 1988-12-12 | 1988-12-12 | Wear resistant spheroidal graphite cast iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02159345A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5424368A (en) * | 1977-07-27 | 1979-02-23 | Kawasaki Steel Corp | Vibration water removal apparatus |
| JPS5441216A (en) * | 1977-09-07 | 1979-04-02 | Toyo Kogyo Co | Wearrresistant spheroidal iron and slidinggproducts made of cast iron |
| JPS5441532A (en) * | 1977-09-08 | 1979-04-02 | Hokoku Kogyo | Device of controlling light weight fall speed of lifting gear of sluice door |
-
1988
- 1988-12-12 JP JP31310088A patent/JPH02159345A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5424368A (en) * | 1977-07-27 | 1979-02-23 | Kawasaki Steel Corp | Vibration water removal apparatus |
| JPS5441216A (en) * | 1977-09-07 | 1979-04-02 | Toyo Kogyo Co | Wearrresistant spheroidal iron and slidinggproducts made of cast iron |
| JPS5441532A (en) * | 1977-09-08 | 1979-04-02 | Hokoku Kogyo | Device of controlling light weight fall speed of lifting gear of sluice door |
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