JPS62222026A - Manufacture of brake part - Google Patents
Manufacture of brake partInfo
- Publication number
- JPS62222026A JPS62222026A JP6217586A JP6217586A JPS62222026A JP S62222026 A JPS62222026 A JP S62222026A JP 6217586 A JP6217586 A JP 6217586A JP 6217586 A JP6217586 A JP 6217586A JP S62222026 A JPS62222026 A JP S62222026A
- Authority
- JP
- Japan
- Prior art keywords
- cast iron
- hub
- molten metal
- brake
- eutectic
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 20
- 239000010439 graphite Substances 0.000 claims abstract description 20
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000013016 damping Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 7
- 229910001567 cementite Inorganic materials 0.000 claims abstract description 5
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000004576 sand Substances 0.000 claims abstract description 5
- 229910001566 austenite Inorganic materials 0.000 claims abstract description 3
- 230000005496 eutectics Effects 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 abstract description 3
- 235000019589 hardness Nutrition 0.000 description 14
- 239000000463 material Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 101150082137 Mtrr gene Proteins 0.000 description 1
- 229910001035 Soft ferrite Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/0006—Noise or vibration control
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- 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、自動車用のブレーキドラム、ブレーキロータ
などのブレーキ部品とその製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to brake parts such as brake drums and brake rotors for automobiles, and a method for manufacturing the same.
ブレーキ部品としてはドラム及びロータの２種類が一般
に用いられている。第１，２図に示すようにドラム１及
びロータ２はいずれもボルト３によってハブ４に固着し
て使用されるもので、ハブ４は強度と靭性が要求される
ためＦ’ＣＤ５０程度の球状黒鉛鋳鉄が用いられ、ドラ
ム１、及びロータ２は熱伝導性、減衰能など、いわゆる
ブレーキ性能の優れたＦＣ２５程度の片状黒鉛鋳鉄が用
いられている。Two types of brake components are commonly used: drums and rotors. As shown in Figures 1 and 2, both the drum 1 and the rotor 2 are used by being fixed to a hub 4 with bolts 3, and the hub 4 is made of spheroidal graphite with a F'CD of about 50 because strength and toughness are required. Cast iron is used, and the drum 1 and rotor 2 are made of flake graphite cast iron of about FC25, which has excellent braking performance such as thermal conductivity and damping ability.
このように１球状黒鉛鋳鉄製のハブ４と片状思釦訪鉄製
のドラム１、あるいはロータ２をそれぞれ機械加工して
ボルト３により同心に組み立て使用するものである。In this way, the hub 4 made of spheroidal graphite cast iron and the drum 1 or rotor 2 made of flaky iron are machined and assembled concentrically with bolts 3 for use.
ところが近年、更にブレーキ性能の優れたドラム及びロ
ータの要求が高まり、特に制動時に発する、いわゆるブ
レーキのｒ鳴き」現象の防止が強く望まれている。However, in recent years, there has been an increasing demand for drums and rotors with even better braking performance, and in particular, there is a strong desire to prevent so-called brake squeal, which occurs during braking.
このｒ鳴き」の発生の確率と、部材を構成する材料の減
衰能特性の間には密接な関係がある。There is a close relationship between the probability of occurrence of this "squeal" and the damping ability characteristics of the material constituting the member.
すなわち、第１表に示すように部材より切り出したテス
トピースのＱ−１値が１６Ｘ１０−’以上でＴ鳴き」の
発生は防止できる。That is, as shown in Table 1, if the Q-1 value of the test piece cut out from the member is 16X10-' or more, the occurrence of "T-squeal" can be prevented.
第１表
次にＱ−１値と、材料の化学組成の一つである炭素当量
Ｃ−Ｅ＝Ｃ（％）＋１／３Ｓｉ（％）の間にも直線関係
が存在する。Table 1 Next, there is also a linear relationship between the Q-1 value and the carbon equivalent C-E=C (%) + 1/3 Si (%), which is one of the chemical compositions of the material.
すなわち、第３図に示すように材料の炭素当量が４．３
以上でほぼＱ−１値の１６ＸＩＯ−３以上を満足する。That is, as shown in Figure 3, the carbon equivalent of the material is 4.3.
The above substantially satisfies the Q-1 value of 16XIO-3 or more.
なお、鋳鉄材の減衰特性を支配する大きな要素は黒鉛の
形状と量である。形状においては片状黒鉛が最も減衰能
を向上させ、量においては黒鉛の組織中に占める面積率
が約１５％以上でＱ−１値〉１６Ｘ１０−’を満足する
様になる。この黒εイ）面積率〉１５％はＣ−Ｅ値を共
晶点以上にすることによって満足されるため、本明細書
では、工業的に制御し易いＣ−Ｅ値をもって表示するこ
ととした。Note that the major factors governing the damping characteristics of cast iron materials are the shape and amount of graphite. In terms of shape, flaky graphite improves the attenuation ability the most, and in terms of quantity, when the area ratio of graphite in the structure is about 15% or more, the Q-1 value>16X10-' is satisfied. This black εa) area ratio of 15% can be satisfied by making the C-E value equal to or higher than the eutectic point, so in this specification, it is expressed using the C-E value, which is easy to control industrially. .
ここで問題となるのは、上記のように炭素当量が４．３
以上、すなわち、過共晶成分の片状黒鉛鋳鉄は硬度が低
く、このため第１図及び第２図で示したハブ１とボルト
３による組み立て部が塑性変形及び損耗し使用に耐えな
くなることである。The problem here is that the carbon equivalent is 4.3 as mentioned above.
In other words, flake graphite cast iron with a hypereutectic component has low hardness, and as a result, the assembly of the hub 1 and bolts 3 shown in Figures 1 and 2 will undergo plastic deformation and wear, making it unusable. be.
ちなみに、ＦＣ２５相当品の硬度はＨＢ １９２〜２４
１であるのに比べ、Ｑ−１値が１６ＸＩＯ−３以上で満
足する片状黒鉛鋳鉄はＨＢ １３０〜１６５８度である
。By the way, the hardness of the FC25 equivalent product is HB 192-24.
1, whereas flake graphite cast iron with a Q-1 value of 16XIO-3 or higher has an HB of 130 to 1658 degrees.
なお、硬度がＨＢ １３０の過共晶片状黒鉛鋳鉄の基地
組織に占めるフェライト面積率は約４０％であり、摺動
部の耐摩耗性を保つには、軟かいフェライトの面積率を
ほぼ４０％以下にする必要がある。The area ratio of ferrite in the matrix structure of hypereutectic flaky graphite cast iron with a hardness of HB 130 is approximately 40%, and in order to maintain the wear resistance of sliding parts, the area ratio of soft ferrite must be approximately 40%. It is necessary to do the following.
本発明の目的は、単一化学組成の溶湯を鋳型に注入して
、摺動部付近は「鳴き」を防止するに充分な材質とし、
しかもボルトによる組み立て部は使用中に塑性変形及び
損耗することのない材質としたブレーキ部品とその製造
法を提供するものである。The purpose of the present invention is to inject molten metal with a single chemical composition into a mold, and make the material near the sliding parts sufficient to prevent "squeal".
Furthermore, the present invention provides a brake component and a method for manufacturing the same, in which the bolt assembly is made of a material that will not undergo plastic deformation or wear during use.
本発明者は、上述せる欠点に鑑み、摺動部付近のブレー
キ性能の向上、およびハブ取付部付近の機械的性質の改
善について、種々研究を重ねた結果、自動車用ブレーキ
に用いる部品として最も好適なブレーキ部品とその製造
法を開発するに到ったものである。In view of the above-mentioned drawbacks, the inventor of the present invention conducted various studies to improve the brake performance near the sliding part and the mechanical properties near the hub attachment part, and found that it is the most suitable part for use in automobile brakes. This led to the development of brake parts and their manufacturing method.
すなわち１本発明のブレーキ部品は、摺動部とハブ取付
部を有し単一溶湯による鋳造製一体構造のブレーキ部品
であって、上記摺動部付近を高減衰能を有する片状黒鉛
組織となし、上記ハブ取付部付近を高強度鋳鉄組織とな
すことを特徴とするものであり、さらに本発明のブレー
キ部品の製造法は、砂型鋳型内のハブ取付部付近に冷し
金を埋設し、過共晶片状黒鉛鋳鉄組成を有する溶湯を注
入することを特徴とするものである。In other words, the brake component of the present invention is a brake component having a sliding part and a hub mounting part and having an integral structure made of a single molten metal, and in which the vicinity of the sliding part is made of flaky graphite structure having high damping ability. None, the area near the hub attachment part is characterized by a high-strength cast iron structure, and the method for manufacturing brake parts of the present invention further includes embedding a cold metal near the hub attachment part in a sand mold, It is characterized by injecting molten metal having a hypereutectic flake graphite cast iron composition.
さらに他の発明であるブレーキ部品の製造法は、砂型鋳
型内のハブ取付部付近に冷し金を埋設し、過共晶片状黒
鉛鋳鉄組成を有する溶湯を注入して得た鋳造品を共晶セ
メンタイトが分解する温度以上の温度に加熱保持し、然
る後、基地組織がオーステナイトである温度範囲より放
冷することを特徴とするものである。Yet another invention, a method for manufacturing brake parts, involves embedding a cold metal near the hub attachment part in a sand mold, and injecting a molten metal having a composition of hypereutectic flake graphite cast iron into a cast product. It is characterized in that it is heated and held at a temperature above the temperature at which cementite decomposes, and then allowed to cool from a temperature range where the matrix structure is austenite.
以下本発明の実施例を図面に基いてさらに詳細に説明す
る。Embodiments of the present invention will be described in more detail below with reference to the drawings.
〔実施例、１〕
（１）鋳造方案
第４，５図はともに鋳型の断面図であり、第４図はドラ
ムの鋳造方案、第５図はロータの鋳造方案を示すもので
ある。[Example 1] (1) Casting scheme Figures 4 and 5 are both cross-sectional views of the mold. Figure 4 shows a drum casting scheme, and Figure 5 shows a rotor casting scheme.
第４図の５は黒鉛系塗型を施した鋳鉄製リング状冷し金
で、厚さは相対するハブ取付部の肉厚と同じ１７ｎｏｎ
であり、第５図の６は上記と同様の処理を施した冷し金
で、厚さはハブ取付部の肉厚と同じ１３關である。5 in Fig. 4 is a cast iron ring-shaped cooling metal with graphite coating, and the thickness is 17mm, which is the same as the wall thickness of the opposing hub mounting part.
6 in FIG. 5 is a cooling metal which has been treated in the same way as described above, and its thickness is 13 mm, which is the same as the thickness of the hub attachment part.
（２）鋳型 鋳型はＣＯ２鋳型を使用した。(2) Mold A CO2 mold was used.
（３）化学成分
鉄と不可避的不純物と第２表の成分とからなる（４）溶
湯処理
注湯直前にＣａ−５ｉｔｉ−３Ｌ当量で０．３％接種し
た。(3) Chemical composition consisting of iron, inevitable impurities, and the components shown in Table 2. (4) Molten metal treatment Immediately before pouring, 0.3% Ca-5iti-3L equivalent was inoculated.
（５）！ｉ造
上記溶湯を第４，５図の鋳型に注湯しドラムとロータを
製作した。(5)! The above molten metal was poured into the mold shown in Figs. 4 and 5 to produce a drum and rotor.
（６）硬度 ドラム及びロータの鋳放し硬度を第３表に示す。(6) Hardness Table 3 shows the as-cast hardness of the drum and rotor.
第３表 （ＨＢ）
（７）組織
第６図にロータのハブ取付部付近の鋳放し状態の顕微鏡
ｍ織を、第７図にロータの摺動部付近の鋳放し状態の顕
微鏡組織を示す。尚、ドラムの各部の組織もロータと殆
ど同様であった。Table 3 (HB) (7) Structure Figure 6 shows the microscopic structure of the as-cast state near the rotor hub attachment part, and Fig. 7 shows the microscopic structure of the as-cast state near the sliding part of the rotor. The structure of each part of the drum was almost the same as that of the rotor.
（８）結果
第３表より明らかなように、ハブ取付部付近の硬度はＦ
Ｃ２５相当の硬度を示し、この値は従来からの経験によ
り使用中にボルト孔部に塑性変形及び損耗を生じること
はない。一方摺動部付近は良好な減衰能を有する過共晶
片状黒鉛鋳鉄に相当する低い硬度を示している。(8) As is clear from the results in Table 3, the hardness near the hub mounting part is F
It exhibits a hardness equivalent to C25, and based on past experience, this value does not cause plastic deformation or wear in the bolt hole during use. On the other hand, the area near the sliding part shows a low hardness corresponding to hypereutectic flake graphite cast iron, which has good damping ability.
第６図の組織は冷し金により急冷されて機密化し、硬度
と整合するＦＣ２５相当の組織を示している。さらに第
７図は充分に成長した過共晶片状黒鉛鋳鉄組織が認めら
れる。The structure shown in FIG. 6 is quenched with a chiller and becomes classified, and shows a structure corresponding to FC25, which matches the hardness. Further, in FIG. 7, a sufficiently grown hypereutectic flaky graphite cast iron structure is recognized.
〔実施例、２〕
実施例、１で明らかなようにドラムとロータはいずれも
殆ど同一の結果を得ることができたので本実施例では、
ロータの製造法についてのみ記述する。[Example 2] As is clear from Example 1, almost the same results could be obtained with both the drum and rotor, so in this example,
Only the manufacturing method of the rotor will be described.
（１）鋳造方案
実施例、１と同様であるが、冷し金の厚さを実施例、ｌ
の３倍すなわち３９ｍｔｒｒとした。(1) Casting method example, same as 1, but the thickness of the chilled metal is
3 times that is, 39 mtrr.
（２）鋳型 鋳型はＣＯ２鋳型を使用した。(2) Mold A CO2 mold was used.
（３）化学成分
鉄と不可避的不純物と第４表の成分とからなる（４）ｕ
造
上記溶湯を第５図の鋳型に注入しロータを製作した。(3) Chemical composition consisting of iron, unavoidable impurities, and the components listed in Table 4 (4) u
A rotor was manufactured by pouring the molten metal into the mold shown in Figure 5.
（５）鋳放し状態の組織
第８図にロータのハブ取付部付近の金属顕微鏡Ｍｉ織を
示す。(5) Structure in as-cast state FIG. 8 shows the metallurgical Mi fabric near the rotor hub attachment part.
（６）熱処理
ロータを９２０℃に加熱し３時間保持した後、８２０℃
まで炉冷し１時間保持した後放冷した。(6) Heat treatment After heating the rotor to 920℃ and holding it for 3 hours, 820℃
After cooling in the oven for 1 hour, the mixture was allowed to cool.
（７）硬度 熱処理後のロータの硬度を第５表に示す。(7) Hardness Table 5 shows the hardness of the rotor after heat treatment.
第５表 （ＨＢ）
（８）組織
第９図にロータの熱処理後のハブ取付部付近の顕微鏡組
織を、第１０図に同じく摺動部付近の顕微鏡組織を示す
。Table 5 (HB) (8) Structure FIG. 9 shows the microscopic structure near the hub attachment part of the rotor after heat treatment, and FIG. 10 shows the microscopic structure near the sliding part.
（９）結果
冷し金を厚くした場合、第１０図に示すようにセメンタ
イトが晶出する。従ってこのまま使用するとハブ取付部
付近より欠損する恐れがある。(9) As a result, when the thickness of the cooled metal is increased, cementite crystallizes as shown in FIG. Therefore, if you use it as is, there is a risk that it will break off near the hub attachment part.
これに対し前述の熱処理を施すとハブ取付部付近はセメ
ンタイトが分解して塊状の黒鉛組織になると同時に硬度
もＨＢ ２３１となり実施例、１と比較して更に塑性変
形及び損耗に対して抵抗性を増大した材質となる。On the other hand, when the above-mentioned heat treatment is applied, the cementite decomposes near the hub attachment part and becomes a blocky graphite structure, and at the same time, the hardness becomes HB 231, making it even more resistant to plastic deformation and wear than Example 1. It becomes an increased material.
一方摺動部付近の片状黒鉛の形態および量は変化がなく
、硬度もＨＢ １４２と高減衰能を満足する過共晶片状
黒鉛鋳鉄組織となっている。On the other hand, the form and amount of graphite flakes near the sliding part do not change, and the hardness is HB 142, which is a hypereutectic flake graphite cast iron structure that satisfies high damping performance.
尚、これらの硬度は、放冷する温度の設定および放冷時
の冷却条件を適宜設定することにより、所望の値に調整
することができる。In addition, these hardnesses can be adjusted to desired values by appropriately setting the temperature for cooling and the cooling conditions during cooling.
以上の説明で明らかなように本発明により製造されたド
ラム、ロータなどのブレーキ部品は摺動部付近は高減衰
能を有する片状黒鉛組織で良好なブレーキ性能を備え、
ハブ取付部付近は機械的性質の優れた高強度紡鉄組織を
有するものである。As is clear from the above explanation, brake parts such as drums and rotors manufactured according to the present invention have a flaky graphite structure with high damping ability near the sliding parts, and have good braking performance.
The area around the hub attachment part has a high-strength spun structure with excellent mechanical properties.
また、このような両特性を備えたブレーキ部品を単一の
溶湯によって製作し得た本発明は製造原価の低減、耐用
寿命の増大、安全性の向上等工業的に極めて優れた多く
の効果を有するものである。In addition, the present invention, which allows brake parts with both of these characteristics to be manufactured using a single molten metal, has many industrially excellent effects such as reduced manufacturing costs, increased service life, and improved safety. It is something that you have.
第１図はドラムの断面図、第２図はロータの断面図、第
３図は減衰能とＣ−Ｅ値の関係図、第４゜５図はともに
鋳型の断面図、第６〜１０図は金属顕微鏡組織写真であ
る。
１ニドラム ２：ロータ ３：ボルト
見５ｊ￥Ｊ
施＋ｊ’ｉFigure 1 is a sectional view of the drum, Figure 2 is a sectional view of the rotor, Figure 3 is a diagram of the relationship between damping capacity and C-E value, Figures 4 and 5 are sectional views of the mold, and Figures 6 to 10. is a photo of the metallurgical microstructure. 1 Ni drum 2: Rotor 3: Bolt viewing 5j￥J Shi+j'i
Claims (1)
体構造のブレーキ部品であって、上記摺動部付近を高減
衰能を有する片状黒鉛組織となし、上記ハブ取付部付近
を高強度鋳鉄組織となすことを特徴とするブレーキ部品
。 ２、砂型鋳型内のハブ取付部付近に冷し金を埋設し、過
共晶片状黒鉛鋳鉄組成を有する溶湯を注入することを特
徴とするブレーキ部品の製造法。 ３、砂型鋳型内のハブ取付部付近に冷し金を埋設し、過
共晶片状黒鉛鋳鉄組成を有する溶湯を注入して得た鋳造
品を共晶セメンタイトが分解する温度以上の温度に加熱
保持し、然る後、基地組織がオーステナイトである温度
範囲より放冷することを特徴とするブレーキ部品の製造
法。[Scope of Claims] 1. A brake component having a sliding part and a hub mounting part and having an integral structure made of a single molten metal, wherein the vicinity of the sliding part is made of flake graphite structure having high damping ability. , a brake component characterized in that the vicinity of the hub attachment portion is made of a high-strength cast iron structure. 2. A method for manufacturing brake parts, characterized by burying a cold metal near the hub attachment part in a sand mold and injecting molten metal having a composition of hypereutectic flaky graphite cast iron. 3. A cooling metal is buried near the hub attachment part in the sand mold, and the cast product obtained by injecting molten metal with a hypereutectic flake graphite cast iron composition is heated and maintained at a temperature higher than the temperature at which eutectic cementite decomposes. A method for producing a brake component, which is then allowed to cool to a temperature range in which the base structure is austenite.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6217586A JPS62222026A (en) | 1986-03-20 | 1986-03-20 | Manufacture of brake part |
| US07/026,750 US4807728A (en) | 1986-03-20 | 1987-03-17 | Brake member and method of manufacturing same |
| DE19873709062 DE3709062A1 (en) | 1986-03-20 | 1987-03-19 | BRAKE ELEMENT FOR MOTOR VEHICLE BRAKES AND METHOD FOR THE PRODUCTION THEREOF |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6217586A JPS62222026A (en) | 1986-03-20 | 1986-03-20 | Manufacture of brake part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62222026A true JPS62222026A (en) | 1987-09-30 |
Family
ID=13192522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6217586A Pending JPS62222026A (en) | 1986-03-20 | 1986-03-20 | Manufacture of brake part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62222026A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01107958A (en) * | 1987-10-19 | 1989-04-25 | Honda Motor Co Ltd | Casting and casting method thereof |
| JP2013233564A (en) * | 2012-05-09 | 2013-11-21 | Kurimoto Ltd | Method for casting cast-iron plate |
-
1986
- 1986-03-20 JP JP6217586A patent/JPS62222026A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01107958A (en) * | 1987-10-19 | 1989-04-25 | Honda Motor Co Ltd | Casting and casting method thereof |
| JPH0455776B2 (en) * | 1987-10-19 | 1992-09-04 | Honda Motor Co Ltd | |
| JP2013233564A (en) * | 2012-05-09 | 2013-11-21 | Kurimoto Ltd | Method for casting cast-iron plate |
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