JPH01252737A - Alloyed cast iron brake shoe for vehicle - Google Patents
Alloyed cast iron brake shoe for vehicleInfo
- Publication number
- JPH01252737A JPH01252737A JP8177388A JP8177388A JPH01252737A JP H01252737 A JPH01252737 A JP H01252737A JP 8177388 A JP8177388 A JP 8177388A JP 8177388 A JP8177388 A JP 8177388A JP H01252737 A JPH01252737 A JP H01252737A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- temp
- cast iron
- brake shoe
- vehicle
- 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 claims abstract description 18
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 11
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 229910001562 pearlite Inorganic materials 0.000 abstract description 6
- 229910052804 chromium Inorganic materials 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 238000000354 decomposition reaction Methods 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 2
- 229910052710 silicon Inorganic materials 0.000 abstract description 2
- 229910052717 sulfur Inorganic materials 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 abstract 2
- 230000000087 stabilizing effect Effects 0.000 abstract 2
- 239000011572 manganese Substances 0.000 description 17
- 239000011651 chromium Substances 0.000 description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- -1 manganese carbides Chemical class 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910017060 Fe Cr Inorganic materials 0.000 description 1
- 229910002544 Fe-Cr Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Landscapes
- Braking Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は車両用合金鋳鉄制輪子に関し、特にたとえば
気動車２客車２機関車および貨車などの鉄道車両のブレ
ーキ装置に用いられる、車両用合金鋳鉄制輪子に関する
。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to alloy cast iron brake shoes for vehicles, and in particular to alloy cast iron brake shoes for vehicles, which are used in brake devices for railway vehicles such as two diesel cars, two passenger cars, two locomotives, and freight cars. Regarding brake shoes.
（従来技術）
従来、鉄道車両用鋳鉄制輪子の材料として、片状黒鉛と
パーライトとからなる普通鋳鉄が用いられていた。普通
鋳鉄からなる制輪子の特徴は、湿潤条件下でも摩擦係数
が安定しており、車両踏面への悪影響が少ないことであ
る。(Prior Art) Conventionally, ordinary cast iron made of flaky graphite and pearlite has been used as a material for cast iron brake shoes for railway vehicles. Bracelet shoes made of ordinary cast iron are characterized by a stable coefficient of friction even under humid conditions, and less negative impact on vehicle treads.
（発明が解決しようとする問題点）
しかしながら、普通鋳鉄からなる制輪子は、高速域での
摩擦係数が低くて制動距離が長くなることおよび摩耗し
やすくて寿命が短いことがその欠点として挙げられる。(Problems to be Solved by the Invention) However, the disadvantages of brake shoes made of ordinary cast iron are that they have a low coefficient of friction in high-speed ranges, resulting in a long braking distance, and are prone to wear, resulting in a short service life. .
すなわち、車両が高速化しまた経費低減の要求が高まる
中、制輪子の摩擦係数が低いと制動距離が伸びてしまう
という問題があり、また、制輪子の耐摩耗性が低いと現
場保守に経費がかかるなどの問題があった。In other words, as vehicles become faster and the demand for cost reduction increases, there is a problem that braking distance increases if the friction coefficient of the brake shoes is low, and the cost of on-site maintenance increases if the brake shoes have low wear resistance. There were problems such as
それゆえに、この発明の主たる目的は、高速域での摩擦
係数が高くかつ耐摩耗性に優れた、車両用合金鋳鉄制輪
子を提供することである。Therefore, the main object of the present invention is to provide an alloy cast iron brake shoe for a vehicle that has a high coefficient of friction at high speeds and excellent wear resistance.
（問題点を解決するだめの手段）
第１の発明は、Ｃを２．７〜３．５重量％、Ｓｉを１．
２〜２．５重量％、Ｍｎを１．１〜３゜０重量％、Ｐを
０．１〜０．５重量％、Ｓを０゜０５〜０．１５重量％
、Ｃｕを０．５〜１．５重量％、Ｃｒを２．１〜３．０
重量％およびＭｏを０．２〜１．０重量％含む、車両用
合金鋳鉄制輪子である。(Another means to solve the problem) The first invention contains 2.7 to 3.5% by weight of C and 1.5% by weight of Si.
2 to 2.5% by weight, Mn 1.1 to 3.0% by weight, P 0.1 to 0.5% by weight, S 0.05 to 0.15% by weight.
, 0.5 to 1.5% by weight of Cu, 2.1 to 3.0% of Cr
This is an alloy cast iron brake shoe for a vehicle, which contains 0.2 to 1.0 weight % of Mo.
第２の発明は、Ｃを２．７〜３．５重量％、Ｓｉを１．
２〜２．５重量％、Ｍｎを１．１〜３゜０重量％、Ｐを
０．１〜０．５重量％、Ｓを０゜０５〜０．１５重量％
、 Ｃｕを０．５〜１．５重量％、Ｃｒを２．１〜３
．０重量％およびＭｏを０．２〜１．０重量％含み、さ
らに、０．２〜１．０重量％のＮｉおよび０，０５〜０
．２０重量％のＢのうち少なくとも一方を含む、車両用
合金鋳鉄制輪子である。The second invention contains 2.7 to 3.5% by weight of C and 1.5% by weight of Si.
2 to 2.5% by weight, Mn 1.1 to 3.0% by weight, P 0.1 to 0.5% by weight, S 0.05 to 0.15% by weight.
, 0.5 to 1.5% by weight of Cu, 2.1 to 3% of Cr
．． 0% by weight and 0.2-1.0% by weight of Mo, and further contains 0.2-1.0% by weight of Ni and 0.05-0% by weight.
．． This is an alloy cast iron brake shoe for a vehicle containing at least one of 20% by weight of B.
次に、この発明を構成する各元素の作用および含有量の
限定理由について説明する。Next, the action of each element constituting this invention and the reason for limiting the content will be explained.
Ｍｎ （マンガン）は、基地パーライト量を増加させ、
炭化物の形成を促し、耐摩耗性を付与する。Mn (manganese) increases the amount of base perlite,
Promotes the formation of carbides and provides wear resistance.
特に、組織中に分散するマンガン系炭化物は、高速域で
の摩擦係数を高め耐摩耗性の向上に大きな役割をもつ。In particular, manganese carbides dispersed in the structure play a major role in increasing the friction coefficient at high speeds and improving wear resistance.
そして、Ｍｎの含有量が少なくなりすぎれば、組織中に
マンガン系炭化物がほとんど形成されず高速域での摩擦
係数の向上は顕著なものではなく、かつ、耐摩耗性は従
来のものと同じ程度となる。そのため、Ｍｎの含有量を
１．１重量％以上とした。一方、Ｍｎの含有量が３，０
重量％を越えると、マンガン系炭化物の量が多ずぎで硬
くなりすぎ、車輪に摩損、損傷などの悪影響をおよぼす
、この点も考′慮した結果、Ｍｎの含有量を１．１〜３
．０重量％とじた。If the Mn content is too low, almost no manganese carbide will be formed in the structure, and the improvement in the coefficient of friction at high speeds will not be significant, and the wear resistance will be the same as that of conventional products. becomes. Therefore, the Mn content was set to 1.1% by weight or more. On the other hand, the Mn content is 3.0
If the Mn content exceeds 1.1 to 3% by weight, the amount of manganese carbide will be too large, making it too hard and causing negative effects such as abrasion and damage to the wheels.
．． 0% by weight.
Ｃｒ（クロム）は、それを２．１〜３．０重量％含有す
ることによって、マンガン系炭化物を高温で安定化し、
高温域での制動時による高温加熱によるマンガン系炭化
物の分解を防ぎ、高温域での摩擦係数を安定に維持する
効果がある。また、Ｃｒを２．１〜３．０重量％含有す
ることによって、基地を強靭化することができ、制輪子
の制動動作中の加熱冷却時に生じる体積膨張、収縮の繰
り返しによって起こる熱亀裂を抑制する効果がある。そ
れに対して、Ｃｒの含有量が少なすぎれば、そのような
効果の程度は著しくない。また、Ｃｒの含有量が３．０
重量％を越えれば、Ｆｅ−Ｃｒの炭化物が形成されて脆
くなり、強度、靭性に悪影響をおよぼす。Cr (chromium) stabilizes manganese carbides at high temperatures by containing 2.1 to 3.0% by weight,
It prevents the decomposition of manganese carbide due to high temperature heating during braking in high temperature ranges, and has the effect of maintaining a stable coefficient of friction in high temperature ranges. In addition, by containing 2.1 to 3.0% by weight of Cr, the base can be strengthened and thermal cracks caused by repeated volumetric expansion and contraction that occur during heating and cooling of brake shoes during braking operation can be suppressed. It has the effect of On the other hand, if the Cr content is too low, the degree of such effect is not significant. In addition, the Cr content is 3.0
If it exceeds the weight percentage, Fe-Cr carbides are formed and become brittle, which adversely affects strength and toughness.
Ｐ（リン）を０．１〜０．５重量％含有することによっ
て、組織中に溶融温度が約９５０℃のステダイトが形成
される。そして、高速域からの制動時にステダイトが溶
融することによって、制輪子に、車輪踏面へのなじみや
すさが与えられる。By containing 0.1 to 0.5% by weight of P (phosphorus), steadite with a melting temperature of about 950° C. is formed in the structure. The Steadite melts during braking at high speeds, allowing the brake shoes to easily conform to the wheel tread.
しかしながら、Ｐの含有量が０．１重量％未満では、ス
テダイトの形成に十分ではない。また、Ｐの含有量が０
．５重量％を越えれば、靭性の低下熱亀裂の発生を促す
。However, if the P content is less than 0.1% by weight, it is not sufficient to form steadite. In addition, the P content is 0
．． If it exceeds 5% by weight, toughness decreases and thermal cracks occur.
Ｍｏ（モリブデン）を０．２〜１．０重量％含有するこ
とによって、高温におけるＭｉ織を安定化させ、特に、
高温での機械的性質の改善に効果がある。By containing 0.2 to 1.0% by weight of Mo (molybdenum), the Mi weave at high temperatures is stabilized, and in particular,
Effective in improving mechanical properties at high temperatures.
Ｃｕ（銅）を０．５〜１．５重量％含有することによっ
て、黒鉛が均一に分散され、基地パーライトが緻密にな
り引張強さが向上する。By containing 0.5 to 1.5% by weight of Cu (copper), graphite is uniformly dispersed, base pearlite becomes dense, and tensile strength is improved.
また、Ｃ（炭素）、 Ｓｉ （けい素）およびＳ（
硫黄）は、上記の各成分の特徴を生かし制輪子として調
和のとれた材料とするために、それぞれの含有量を２．
７〜３．５重量％、１．２〜２゜５重量％および０．０
５〜０．１５重量％の範囲に限定した。In addition, C (carbon), Si (silicon) and S (
In order to make use of the characteristics of each component mentioned above to create a material that is harmonious as a brake shoe, the content of each component (sulfur) should be increased to 2.
7-3.5% by weight, 1.2-2°5% by weight and 0.0
It was limited to a range of 5 to 0.15% by weight.
なお、Ｎｆ にッケル）を０．２〜１．０重量％含有
すれば、基地パーライトが緻密になり、高温強さやクリ
ープ強さが向上される。Note that if 0.2 to 1.0% by weight of Nf (nickel) is contained, base pearlite becomes dense and high temperature strength and creep strength are improved.
また、Ｂ（ボロン）を０．０５〜０．２０重量％含有す
れば、黒鉛組織が微細化され、基地パーライトが緻密に
なり機械的性質が改善される。Further, if B (boron) is contained in an amount of 0.05 to 0.20% by weight, the graphite structure is refined, the base pearlite becomes dense, and the mechanical properties are improved.
（発明の効果）
この発明によれば、高速域での摩擦係数が高くかつ耐摩
耗性に優れた、車両用合金鋳鉄制輪子が得られる。(Effects of the Invention) According to the present invention, an alloy cast iron brake shoe for a vehicle, which has a high coefficient of friction in a high-speed range and excellent wear resistance, can be obtained.
この発明の上述の目的、その他の目的、特徴および利点
は、以下の実施例の詳細な説明から一層明らかとなろう
。The above objects, other objects, features and advantages of the present invention will become more apparent from the detailed description of the following embodiments.
（実施例）
まず、別表１に示す化学成分を含みかつ残部がＦｅから
なる各材料で、車両用合金鋳鉄制輪子を作り、それらを
試料番号Ｏ〜１２の試料とした。(Example) First, alloy cast iron brake shoes for vehicles were made from materials containing the chemical components shown in Attached Table 1 and the remainder being Fe, and these were used as samples with sample numbers O to 12.
この場合、試料番号０の試料については、その成分を従
来の普通鋳鉄と同じ成分にした。したがって、試料番号
Ｏの試料は従来例となる。In this case, the sample with sample number 0 was made to have the same composition as conventional ordinary cast iron. Therefore, the sample with sample number O is a conventional example.
また、試料番号１の試料については、ＭｎおよびＣｒの
含有量をこの発明の範囲より少なくした。In addition, for the sample No. 1, the contents of Mn and Cr were lower than the range of the present invention.
試料番号２の試料については、Ｍｎの含有量をこの発明
の範囲より少なくし、Ｃｒの含有量をこの発明の範囲よ
り多くした。試料番号１１の試料については、Ｍｎの含
有量をこの発明の範囲より多くし、Ｃｒの含有量をこの
発明の範囲より少なくした。さらに、試料番号１２の試
料については、ＭｎおよびＣｒの含有量をこの発明の範
囲より多くした。すなわち、試料番号１，２．１１およ
び１２の試料は、この発明の範囲外の比較例である。For sample No. 2, the Mn content was lower than the range of the present invention, and the Cr content was higher than the range of the present invention. For sample No. 11, the Mn content was higher than the range of the present invention, and the Cr content was lower than the range of the present invention. Furthermore, for sample No. 12, the Mn and Cr contents were increased beyond the range of the present invention. That is, samples Nos. 1, 2, 11, and 12 are comparative examples outside the scope of this invention.
そして、試料番号Ｏ〜１２の試料について、それぞれ、
引張強さ（ｋｇｆ／１ｍ”）および硬さ（ＨＢ）の機械
的性質を調べた。And for the samples with sample numbers O to 12, respectively,
The mechanical properties of tensile strength (kgf/1 m'') and hardness (HB) were investigated.
さらに、それらの試料について、それぞれ、実物大の慣
性制動試験機で摩擦摩耗試験を行って、摩擦係数および
摩耗量を調べた。なお、この実物大の慣性制動試験機の
試験条件としては、車輪直径を８６０ｆｌとし、慣性重
量を６．３６ｔｏｎとし、制輪子を押し付ける力を２．
５Ｘ２ｔｏｎとした。Furthermore, each of these samples was subjected to a friction and wear test using a full-scale inertial braking tester to examine the friction coefficient and amount of wear. The test conditions for this full-scale inertial braking test machine were as follows: wheel diameter was 860 fl, inertia weight was 6.36 tons, and force for pressing the brake shoes was 2.
It was set to 5×2 tons.
これらの結果を別表２に示した。なお、摩擦係数につい
ては、ブレーキをかけ始めるときの速度を３５．６５．
９５．１１０および１２５ｋｍ／ｈとして、それぞれ５
回ずつ測定しそれらの平均値で示した。These results are shown in Attached Table 2. Regarding the friction coefficient, the speed when starting to apply the brake is 35.65.
95.5 as 110 and 125 km/h, respectively.
It was measured twice and the average value is shown.
この結果より、この発明の範囲外である試料番号１の試
料では、その摩耗量が多いことがわかる。From this result, it can be seen that sample No. 1, which is outside the scope of the present invention, has a large amount of wear.
従来例となる試料番号Ｏの試料では、その摩耗量がさら
に多いことがわかる。また、この発明の範囲外である試
料番号２．１１および１２の試料では、いずれも、引張
強さが小さくて強度、靭性が劣り、かつ、硬くなりすぎ
て車輪に損傷などの悪影響を与えることがわかる。It can be seen that the amount of wear in the sample number O, which is a conventional example, is even greater. In addition, samples with sample numbers 2.11 and 12, which are outside the scope of this invention, both have low tensile strength and poor strength and toughness, and are too hard, causing damage to the wheels and other negative effects. I understand.
それに対して、この発明の範囲内である試料番号３〜１
０の試料では、いずれも、引張強さが２５ （ｋ ｇ
ｆ ／ｍ” ）以上であって鋳鉄制輪子の引張強さとし
て満足でき、硬さ（ＨＢ）が３４４以下であって車輪に
損傷などの悪影害を与えないことがわかる。しかも、こ
の発明の範囲内である試料番号３〜１０の試料では、い
ずれも、従来例となる試料番号０の試料に比べて、摩擦
係数が太き（て摩擦性能が優れ、かつ、摩耗量が１／４
〜１１５程度に少なくなって耐摩耗性に優れていること
がわかる。On the other hand, sample numbers 3 to 1, which are within the scope of this invention.
0 samples, the tensile strength is 25 (kg g
f/m"), which is satisfactory as the tensile strength of cast iron brake shoes, and whose hardness (HB) is 344 or less, which does not cause any adverse effects such as damage to the wheels.Moreover, it can be seen that the present invention The samples with sample numbers 3 to 10, which fall within the range of
It can be seen that the wear resistance is excellent, with a decrease of about 115%.
以上のように、この発明にかかる制輪子は、従来の制輪
子に比べて、高速域での摩擦係数が高くかつ耐摩耗性に
優れ、車両の高速化および経費低減に対応した制輪子で
あることがわかる。As described above, the brake shoe according to the present invention has a higher coefficient of friction in high-speed ranges and excellent wear resistance than conventional brake shoes, and is a brake shoe that is compatible with increasing vehicle speed and reducing costs. I understand that.
なお、制輪子の材料となるＦｅとしては、高純度のＦｅ
を用いることが好ましいが、不純物が混在するＦｅが用
いられてもよい。In addition, high-purity Fe is used as the material for the brake shoes.
It is preferable to use Fe, but Fe mixed with impurities may also be used.
特許出願人 上田ブレーキ株式会社 代理人 弁理士 岡 １） 全 啓Patent applicant: Ueda Brake Co., Ltd. Agent: Patent Attorney Oka 1) Zenhiro
Claims (1)
重量％、Ｍｎを１．１〜３．０重量％、Ｐを０．１〜０
．５重量％、Ｓを０．０５〜０．１５重量％、Ｃｕを０
．５〜１．５重量％、Ｃｒを２．１〜３．０重量％およ
びＭｏを０．２〜１．０重量％含む、車両用合金鋳鉄制
輪子。 ２ Ｃを２．７〜３．５重量％、Ｓｉを１．２〜２．５
重量％、Ｍｎを１．１〜３．０重量％、Ｐを０．１〜０
．５重量％、Ｓを０．０５〜０．１５重量％、Ｃｕを０
．５〜１．５重量％、Ｃｒを２．１〜３．０重量％およ
びＭｏを０．２〜１．０重量％含み、さらに、 ０．２〜１．０重量％のＮｉおよび０．０５〜０．２０
重量％のＢのうち少なくとも一方を含む、車両用合金鋳
鉄制輪子。[Claims] 1 C: 2.7 to 3.5% by weight, Si: 1.2 to 2.5% by weight
Weight%, Mn 1.1 to 3.0 weight%, P 0.1 to 0
．． 5% by weight, S 0.05-0.15% by weight, Cu 0
．． An alloy cast iron brake shoe for a vehicle, comprising 5 to 1.5% by weight, 2.1 to 3.0% by weight of Cr, and 0.2 to 1.0% by weight of Mo. 2 2.7-3.5% by weight of C, 1.2-2.5% of Si
Weight%, Mn 1.1 to 3.0 weight%, P 0.1 to 0
．． 5% by weight, S 0.05-0.15% by weight, Cu 0
．． 5 to 1.5% by weight, 2.1 to 3.0% by weight of Cr, and 0.2 to 1.0% by weight of Mo, furthermore, 0.2 to 1.0% by weight of Ni and 0.05% by weight. ~0.20
An alloy cast iron brake shoe for a vehicle, comprising at least one of B in the weight percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8177388A JPH01252737A (en) | 1988-03-31 | 1988-03-31 | Alloyed cast iron brake shoe for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8177388A JPH01252737A (en) | 1988-03-31 | 1988-03-31 | Alloyed cast iron brake shoe for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01252737A true JPH01252737A (en) | 1989-10-09 |
Family
ID=13755795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8177388A Pending JPH01252737A (en) | 1988-03-31 | 1988-03-31 | Alloyed cast iron brake shoe for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01252737A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2274827A (en) * | 1993-02-03 | 1994-08-10 | Hitachi Ltd | lift brakes |
| CN106367675A (en) * | 2016-11-03 | 2017-02-01 | 广西大学 | Heat treatment method for phosphor copper abrasion-resistant cast iron |
| CN106435349A (en) * | 2016-11-03 | 2017-02-22 | 广西大学 | Phosphor copper wear resistant cast iron and preparation method thereof |
-
1988
- 1988-03-31 JP JP8177388A patent/JPH01252737A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2274827A (en) * | 1993-02-03 | 1994-08-10 | Hitachi Ltd | lift brakes |
| GB2274827B (en) * | 1993-02-03 | 1996-09-25 | Hitachi Ltd | Emergency stop device for elevator and elevator |
| CN106367675A (en) * | 2016-11-03 | 2017-02-01 | 广西大学 | Heat treatment method for phosphor copper abrasion-resistant cast iron |
| CN106435349A (en) * | 2016-11-03 | 2017-02-22 | 广西大学 | Phosphor copper wear resistant cast iron and preparation method thereof |
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