JPH0765132B2 - Sintered alloy friction material - Google Patents
Sintered alloy friction materialInfo
- Publication number
- JPH0765132B2 JPH0765132B2 JP25398586A JP25398586A JPH0765132B2 JP H0765132 B2 JPH0765132 B2 JP H0765132B2 JP 25398586 A JP25398586 A JP 25398586A JP 25398586 A JP25398586 A JP 25398586A JP H0765132 B2 JPH0765132 B2 JP H0765132B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- friction
- tin
- sintered alloy
- friction material
- 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.)
- Expired - Fee Related
Links
- 239000002783 friction material Substances 0.000 title claims description 18
- 239000000956 alloy Substances 0.000 title claims description 11
- 229910045601 alloy Inorganic materials 0.000 title claims description 10
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 239000010439 graphite Substances 0.000 claims description 9
- 229910002804 graphite Inorganic materials 0.000 claims description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 7
- 239000011701 zinc Substances 0.000 claims description 7
- 229910052725 zinc Inorganic materials 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 150000004767 nitrides Chemical class 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 10
- 230000013011 mating Effects 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- -1 alumina Chemical class 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 2
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229910000669 Chrome steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NVWFRDCLDFIDOZ-UHFFFAOYSA-N [Mo](=S)=S.[S-2].[Mn+2] Chemical compound [Mo](=S)=S.[S-2].[Mn+2] NVWFRDCLDFIDOZ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 150000002843 nonmetals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、高摩擦係数を有する乾式焼結摩擦材料に関
し、更に詳しくは、二輪及び四輪自動車、産業用車両、
鉄道用車両等のブレーキライニング材、デイスクブレー
キパツド材、クラツチフエーシング材等として有用な摩
擦合金材料に関する。Description: TECHNICAL FIELD The present invention relates to a dry sintered friction material having a high coefficient of friction, and more specifically, a two-wheel and four-wheel automobile, an industrial vehicle,
The present invention relates to a friction alloy material useful as a brake lining material for railway vehicles, a disc brake pad material, a clutch facing material, and the like.
従来の技術及びその問題点 従来車両用特に二輪乃至四輪自動車用の摩擦材料として
は、石綿を含有するレジンモールドが使用されて来た
が、現今の公害防止の要望に対処すべく、金属繊維を含
有するセミメタリツクタイプの材料が広く使用される様
になつている。しかしながら、このセミメタリツクタイ
プの摩擦材料にも、降雨時に摩擦係数が低下する、高負
荷等の苛酷な条件下ではレジンの炭化によりやはり摩擦
係数が低下する等の欠点がある。従つて、最近では焼結
合金系の摩擦材料が次第に使用される様になつて来た
が、これについても更に性能向上が求められている。即
ち、自動車においては、省エネルギーの為の小型化及び
軽量化が急速に進行しており、デイスクブレーキ機構等
に対しても小型化が要求されている。そして、ディスク
ブレーキ機構等の小型化を実現する為には、低速域から
高速域の広い範囲において摩擦係数が高く、摩耗量の少
ない新しい焼結合金摩擦材料が必要となつている。Conventional technology and its problems Resin molds containing asbestos have been used as friction materials for conventional vehicles, especially for two-wheeled and four-wheeled vehicles, but metal fibers have been used to meet the current demands for pollution prevention. A semi-metalic type material containing is widely used. However, this semi-metalic type friction material also has drawbacks such as a reduction in friction coefficient during rainfall, and a reduction in friction coefficient due to carbonization of the resin under severe conditions such as high load. Therefore, recently, sintered alloy-based friction materials have come to be used gradually, and further improvement in performance is also required for these. That is, in automobiles, miniaturization and weight reduction for energy saving are rapidly progressing, and miniaturization is also required for a disc brake mechanism and the like. In order to reduce the size of the disc brake mechanism and the like, a new sintered alloy friction material having a high friction coefficient and a small amount of wear is required in a wide range from a low speed range to a high speed range.
問題点を解決するための手段 本発明は、上記の如き要求に応えるべくなされたもので
あり、（１）銅10〜60重量％、（２）錫又は錫と亜鉛の
合計量１〜20重量％、（３）黒鉛５〜15重量％、（４）
硫化物固体潤滑剤の少なくとも１種0.3〜７重量％、
（５）金属酸化物の少なくとも１種0.5〜10重量％、
（６）硬質窒化物の少なくとも１種17〜50重量％及び
（７）ニツケル５〜50重量％からなることを特徴とする
焼結合金摩擦材料に係る。Means for Solving the Problems The present invention has been made in order to meet the above demands, and (1) 10 to 60% by weight of copper, (2) tin or a total amount of tin and zinc of 1 to 20% by weight. %, (3) 5 to 15% by weight of graphite, (4)
0.3 to 7% by weight of at least one sulfide solid lubricant,
(5) 0.5 to 10% by weight of at least one metal oxide,
(6) A sintered alloy friction material comprising at least one type of hard nitrides 17 to 50% by weight and (7) nickel 5 to 50% by weight.
本発明によれば、耐摩耗性に優れ、摩擦係数が高く、操
作性に優れ、降雨時にも摩擦係数の低下を実質的に生じ
ない焼結合金摩擦材料が得られる。ADVANTAGE OF THE INVENTION According to this invention, the sintered alloy friction material which is excellent in abrasion resistance, has a high friction coefficient, is excellent in operability, and does not cause a fall of a friction coefficient substantially even at the time of rain is obtained.
以下本発明の焼結合金摩擦材料の各成分について説明す
る。これ等の各成分は、相互に関連しつつ摩擦材料とし
ての物性に影響するので、夫々の限定理由を個別に論ず
ることは必ずしも妥当ではないが、一応の限定理由を併
せて示す。Each component of the sintered alloy friction material of the present invention will be described below. Since each of these components affects the physical properties of the friction material while being related to each other, it is not always appropriate to discuss the respective limiting reasons individually, but the tentative limiting reasons are also shown.
（１）銅及び（２）錫又は錫と亜鉛 これ等は、合金摩擦材料の素地をなすものであり、焼結
によつて合金化して、いわゆる青銅地を形成し、素地の
強度を高める。特に強度の観点から、銅10〜60重量％に
対し錫又は錫及び亜鉛１〜20重量％とする。錫又は錫及
び亜鉛が１重量％未満の場合には、黒鉛その他の非金属
を保持するに充分な強度が得られず、一方20重量％を上
回る場合には、摩擦材料を脆化させ、強度を低下させ
る。錫と亜鉛とを組み合わせて用いる場合には錫と亜鉛
の合計量の20重量％程度以上が錫であることが好まし
い。(1) Copper and (2) Tin or tin and zinc These form the basis of the alloy friction material and are alloyed by sintering to form a so-called bronze basis, which enhances the strength of the basis. From the viewpoint of strength, tin or tin and zinc are 1 to 20% by weight relative to 10 to 60% by weight of copper. When tin or tin and zinc is less than 1% by weight, sufficient strength to retain graphite and other non-metals cannot be obtained, while when more than 20% by weight, the friction material is embrittled and strength is increased. Lower. When tin and zinc are used in combination, about 20% by weight or more of the total amount of tin and zinc is preferably tin.
（３）黒鉛 黒鉛の添加は、主として摩擦係数を安定させる。即ち、
一般に相互に摺動する摩擦材料の二面間に発生する摩擦
力は、（イ）二面間の一部に生ずる凝着を剪断するに要
する力、及び（ロ）硬質粒子による相手材への掘りおこ
し力によるといわれている。黒鉛は、この様な二面間に
存在することにより、二面間に生ずる凝着を制御する。
従つて適当量の黒鉛の存在により、摩擦材料の摩擦係数
が向上するとともに安定化され、併せて耐摩耗性も向上
する。(3) Graphite The addition of graphite mainly stabilizes the friction coefficient. That is,
Generally, the frictional force generated between two surfaces of friction materials that slide with each other is (a) the force required to shear the adhesion generated in a part between the two surfaces, and (b) the hard particles exert a force on the mating material. It is said that it is due to the digging power. The graphite, which exists between the two surfaces, controls the adhesion that occurs between the two surfaces.
Therefore, the presence of an appropriate amount of graphite improves and stabilizes the friction coefficient of the friction material, and also improves the wear resistance.
黒鉛の量が５重量％未満では、上記の効果が十分に奏さ
れないのに対し、15重量％を上回る場合には、材料強度
が低下するとともに摩擦係数が低下する。If the amount of graphite is less than 5% by weight, the above effect is not sufficiently exhibited, whereas if it exceeds 15% by weight, the material strength and friction coefficient decrease.
（４）二硫化モリブデン、二硫化タングステン、硫化マ
ンガン等の硫化物固体潤滑剤の少なくとも１種 二硫化モリブデン等は、黒鉛と同様の効果を奏するのみ
ならず、いわゆる“鳴き”の防止及び高荷重時の潤滑性
付与という顕著な効果をも発揮する。二硫化モリブデン
等の使用量は、0.3〜７重量％とする。これ等の使用量
が、0.3％未満の場合には、添加の効果が十分に発揮さ
れず、一方７重量％を上回る場合には、材料強度及び摩
擦係数が低下する。(4) At least one kind of sulfide solid lubricant such as molybdenum disulfide, tungsten disulfide and manganese sulfide Molybdenum disulfide and the like not only have the same effect as graphite, but also prevent so-called "squeaking" and high load. It also exerts a remarkable effect of imparting lubricity at the time. The amount of molybdenum disulfide used is 0.3 to 7% by weight. If the amount used is less than 0.3%, the effect of the addition is not sufficiently exerted, while if it exceeds 7% by weight, the material strength and the friction coefficient decrease.
（５）アルミナ、シリカ、ムライト等の金属酸化物の少
なくとも１種 アルミナ等は、0.5〜10重量％の使用範囲において、前
記の掘りおこし効果を奏するとともに、摩擦熱により相
手側摺動面に生成する酸化皮膜を除去することにより摩
擦材料間の凝着を安定的に発生させて、安定的な摩擦力
を発揮させる。使用量が0.5重量％未満の場合には、上
記の効果が十分に発揮されず、一方10重量％を上回る場
合には、相手側摺動面を荒損させる傾向がある。(5) At least one kind of metal oxide such as alumina, silica and mullite Alumina and the like have the above-mentioned digging effect in the usage range of 0.5 to 10% by weight and are generated on the sliding surface of the other side by friction heat. By removing the oxide film, adhesion between the friction materials is stably generated, and a stable friction force is exerted. If the amount used is less than 0.5% by weight, the above effects will not be fully exhibited, while if it exceeds 10% by weight, the mating sliding surface tends to be damaged.
（６）Si3N4、AlN、BN、TiN等の硬質窒化物の少なくと
も１種 これ等は特に低速域での摩擦係数の改善に寄与する。こ
れ等の量が17重量％未満では、摩擦係数の向上が充分に
行なわれ得ず、一方50重量％を上回る場合には、素地強
度が低下するとともに、摩耗量がかえつて増大する。(6) At least one kind of hard nitride such as Si 3 N 4 , AlN, BN, and TiN. These contribute to the improvement of the friction coefficient particularly in the low speed range. If the amount is less than 17% by weight, the coefficient of friction cannot be sufficiently improved. On the other hand, if the amount exceeds 50% by weight, the strength of the base material is lowered and the amount of wear is rather increased.
（７）ニツケル ニツケルを５〜50重量％含有させることにより、高速時
の摩擦係数の低下を防止する効果が奏され、高速域にお
いて高い安定した摩擦係数が維持される。ニツケル５重
量％未満では上記の効果は充分に発揮されず、50重量％
を上回る場合は、焼結し難くなり材料劣化をまねく傾向
がある。(7) Nickel By containing nickel in an amount of 5 to 50% by weight, the effect of preventing a decrease in the friction coefficient at high speed is exhibited, and a high and stable friction coefficient is maintained in the high speed range. If the amount of nickel is less than 5% by weight, the above effect is not sufficiently exerted, and 50% by weight
If it exceeds, it tends to be difficult to sinter and material deterioration may occur.
本発明材料を使用して所望の製品、例えばデイスクブレ
ーキ用部品を製造するには、常法に従つて各原料粉末を
配合し、これを所定の形状にプレス成形した後、中性又
は還元性雰囲気中３〜7kg/cm2程度の加圧下に800〜950
℃程度で焼成すれば良い。In order to produce a desired product, for example, a component for a disc brake, using the material of the present invention, each raw material powder is blended according to a conventional method, and this is pressed into a predetermined shape, and then neutralized or reduced. 800 to 950 under pressure of 3 to 7 kg / cm 2 in the atmosphere
It suffices to bake at about C.
発明の効果 本発明による焼結合金摩擦材料の摩擦係数は、従来品
（0.3〜0.5程度）に比して高く、低速域から高速域の広
い速度域において0.5〜0.8程度にも達する。従つて、本
発明材料を例えば二輪及び四輪自動車用のデイスクブレ
ーキのパツドとして使用する場合には、（イ）ブレーキ
性能の向上、（ロ）パツド及びデイスクの耐摩耗性の向
上、（ハ）ブレーキ機構の小型化、（ニ）パツドのイン
シユレーターの簡素化等の効果が奏される。EFFECTS OF THE INVENTION The friction coefficient of the sintered alloy friction material according to the present invention is higher than that of the conventional product (about 0.3 to 0.5) and reaches about 0.5 to 0.8 in a wide speed range from a low speed range to a high speed range. Therefore, when the material of the present invention is used as a pad of a disc brake for two-wheel and four-wheel vehicles, for example, (a) improvement of brake performance, (b) improvement of wear resistance of the pad and disc, (c) The effects of downsizing of the brake mechanism, simplification of the (d) pad insulator, and the like are achieved.
実 施 例 以下、実施例及び比較例により本発明の特徴とするとこ
ろをより一層明らかにする。Examples Hereinafter, the features of the present invention will be further clarified by Examples and Comparative Examples.
実施例１〜４及び比較例１〜２ 第１表に示す割合の各原料と残余銅とからなる配合物10
0重量部を4ton/cm2の圧力で成形した後、成形物をCuメ
ツキした鋼板上に載せ、N2雰囲気中5kg/mm2の荷重をか
けて850℃で60分間焼成した。Examples 1 to 4 and Comparative Examples 1 to 2 Blends 10 comprising the respective raw materials in the proportions shown in Table 1 and residual copper 10
After molding 0 parts by weight at a pressure of 4 ton / cm 2 , the molded product was placed on a Cu-plated steel plate and baked at 850 ° C. for 60 minutes under a load of 5 kg / mm 2 in an N 2 atmosphere.
かくして得た焼成品をパツド材として慣性力1.25kg・ｍ
・sec2、接触面積20cm2、面圧20kg/cm2として、ブレー
キ初速度50、100又は150km/hrの各条件下に相手デイス
ク材（13クローム鋼）に対し60秒間隔で300回繰返し制
動接触させた。 The fired product thus obtained is used as a pad material and has an inertia force of 1.25 kg.m.
・ Sec 2 , contact area 20 cm 2 , surface pressure 20 kg / cm 2 , 300 times repeated braking at 60 second intervals against mating disc material (13 chrome steel) under each condition of initial brake speed of 50, 100 or 150 km / hr. Contacted.
平均摩擦係数並びにパツド材及びデイスク材の摩耗量を
第２表に示す。Table 2 shows the average friction coefficient and the wear amount of the pad material and the disk material.
第２表に示す結果から明らかな如く、本発明による焼結
合金摩擦材料は、いずれの速度域においても高い摩擦係
数を有しており、耐摩耗性に優れ、且つ相手材の摩耗量
も少ない。 As is clear from the results shown in Table 2, the sintered alloy friction material according to the present invention has a high friction coefficient in any speed range, is excellent in wear resistance, and has a small amount of wear of the mating material. .
Claims (1)
％、 （５）金属酸化物の少なくとも１種0.5〜10重量％、 （６）硬質窒化物の少なくとも１種17〜50重量％、及び （７）ニツケル５〜50重量％ からなることを特徴とする焼結合金摩擦材料。(1) 10 to 60% by weight of copper, (2) 1 to 20% by weight of tin or a total amount of tin and zinc, (3) 5 to 15% by weight of graphite, (4) solid sulfide lubricant At least one kind of 0.3 to 7% by weight, (5) at least one kind of metal oxide 0.5 to 10% by weight, (6) at least one kind of hard nitride 17 to 50% by weight, and (7) nickel 5 to 50% Sintered alloy friction material characterized by being composed of weight%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25398586A JPH0765132B2 (en) | 1986-10-24 | 1986-10-24 | Sintered alloy friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25398586A JPH0765132B2 (en) | 1986-10-24 | 1986-10-24 | Sintered alloy friction material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63109131A JPS63109131A (en) | 1988-05-13 |
| JPH0765132B2 true JPH0765132B2 (en) | 1995-07-12 |
Family
ID=17258666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25398586A Expired - Fee Related JPH0765132B2 (en) | 1986-10-24 | 1986-10-24 | Sintered alloy friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0765132B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102648299A (en) * | 2009-12-07 | 2012-08-22 | 大治美有限公司 | Sintered sliding member |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2516414B2 (en) * | 1988-12-14 | 1996-07-24 | 東芝タンガロイ株式会社 | Brake friction material |
| AT411765B (en) * | 1991-03-20 | 2004-05-25 | Hoerbiger & Co | FRICTION MATERIAL PRODUCED BY SINTER |
| JPH05179232A (en) * | 1991-12-26 | 1993-07-20 | Toshiba Tungaloy Co Ltd | Sintered metallic friction material for brake |
| JPH08253826A (en) | 1994-10-19 | 1996-10-01 | Sumitomo Electric Ind Ltd | Sintered friction material, composite copper alloy powder used therein, and method for producing the same |
| TW455489B (en) | 1999-10-12 | 2001-09-21 | Takano Co Ltd | Rolling walker |
| CN102676871A (en) * | 2011-03-09 | 2012-09-19 | 北京古特莱航空科技发展有限公司 | Sintered friction material for brake of wind power generation equipment and its preparation method |
| JP5716494B2 (en) | 2011-03-30 | 2015-05-13 | 新日鐵住金株式会社 | Sintered friction material for high-speed railway |
| WO2018185944A1 (en) | 2017-04-07 | 2018-10-11 | 新日鐵住金株式会社 | Sintered friction material |
-
1986
- 1986-10-24 JP JP25398586A patent/JPH0765132B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102648299A (en) * | 2009-12-07 | 2012-08-22 | 大治美有限公司 | Sintered sliding member |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63109131A (en) | 1988-05-13 |
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