EP0860508A1 - Material für gleitflächen - Google Patents

Material für gleitflächen Download PDF

Info

Publication number
EP0860508A1
EP0860508A1 EP96928696A EP96928696A EP0860508A1 EP 0860508 A1 EP0860508 A1 EP 0860508A1 EP 96928696 A EP96928696 A EP 96928696A EP 96928696 A EP96928696 A EP 96928696A EP 0860508 A1 EP0860508 A1 EP 0860508A1
Authority
EP
European Patent Office
Prior art keywords
sliding
sliding surface
oil
bronze
biodecomposable
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.)
Withdrawn
Application number
EP96928696A
Other languages
English (en)
French (fr)
Other versions
EP0860508A4 (de
Inventor
Naoji; Manufacturing Engineering HAMASAKA
Hideaki Oyama Factory of Komatsu Ltd. SAITO
Katsuji Oyama Factory of Komatsu Ltd. ISHIKAWA
Satoshi; Construction Equipment Research OHKAWA
Akiko; Construction Equipment Research KONISHI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Akashi Gohdoh Inc
Komatsu Ltd
Original Assignee
Akashi Gohdoh Inc
Komatsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Akashi Gohdoh Inc, Komatsu Ltd filed Critical Akashi Gohdoh Inc
Publication of EP0860508A1 publication Critical patent/EP0860508A1/de
Publication of EP0860508A4 publication Critical patent/EP0860508A4/de
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/08—Alloys based on copper with lead as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/02—Alloys based on copper with tin as the next major constituent

Definitions

  • the present invention relates to a material for a sliding surface employed in sliding parts and so forth of a hydraulic equipment, having a superior sliding ability and demonstrating a superior corrosion resistance against a biodecomposable oil.
  • Hydraulic equipments such as a hydraulic pump, a hydraulic motor have the large number of parts sliding in contact with oil, for example, a cylinder block, a valve plate, a cradle, a piston shoe and so forth. Particularly, the sliding surfaces thereof are formed of materials which has a superior sliding ability.
  • a construction machine can be inspected and repaired in the open outdoors such as a construction site or so forth.
  • the hydraulic equipment such as the hydraulic pump, the hydraulic motor or so forth, if the oil therein drops on the ground, the oil is not decomposed to contaminate the environment.
  • biodecomposable oil causes the corrosion of the material for the sliding surface and found that, many of biodecomposable oils are with a vegetable oil base and sometimes added with an extreme-pressure additive such as sulfur (S) for the purpose of prevention of a baking, since such S causes a solving out of Cu from a lead-bronze type material (Cu-Sn-Pb type), it can be a cause of the corrosion, and that a brass type (Cu-Zn type) material is much less corrosive against the same biodecomposable oil.
  • S sulfur
  • the lead-bronze type material has higher hardness and strength, a better sliding characteristics is achieved under the high bearing pressure, whereas when the bearing pressure is relatively low, the lead-bronze type material having a relatively low hardness which causes a higher conformability, is rather effective.
  • the conformability represents a characteristics to increase a contact area with a counterpart material by causing a local abrading upon sliding.
  • an anti-bearing-pressure ability can be increased as a result of lowering of a local bearing pressure due to the local abrading.
  • the present invention is worked out in view of the foregoing problems. It is an object of the present invention to provide a material for a sliding surface superior in the corrosion resistivity and the conformability.
  • the inventors has reached the present invention as a result of various experiments for obtaining a material for a sliding surface superior in the corrosion resistivity and the conformability.
  • a material for a sliding surface according to the present invention has a composition range consisted of 9.0 to 15.0 Wt% of Sn, 8.5 to 11.0 Wt% of Pb, less than or equal to 13 Wt% of Ni, 3.0 to 10.0 Wt% of Zn and remainder of Cu.
  • test pieces are dipped in vegetable oil as biodecomposable oil which was heated and held for 240 hours at a plurality of predetermined temperatures, and variations of weights of test pieces before and after the dipping were evaluated.
  • Figs. 4 and 5 there is shown results of constant speed friction abrasion test performed for the conventional bronze type material (C) and the developed material 1 with setting a sliding speed V at two levels of 4 and 10 m/sec.
  • the testing method was a measure of the abrasion amount with sliding test pieces formed into a pin shaped configuration on a disc-shaped disc (SCM420H, a carburizing hardened material) under a condition of a constant load and constant rotation speed and a limiting bearing pressure causing a baking while the load was gradually increased.
  • the testing condition are as follows.
  • cylinder block 3 having a cylinder bore 2 in which a piston 1 is slidably inserted, a valve plate 4 sliding on the cylinder block 3, a cradle 5, a piston shoe 6 and so forth.
  • the sliding parts are also a cylinder block 10, a valve plate 11, a bearing 12, a center ball 13 and so forth of a hydraulic motor.
  • the sliding parts is a bushing 21 slidably guiding a piston rod 20 of a cylinder.
  • the material for a sliding surface according to the present invention is superior in corrosion resistance in the biodecomposable oil, and has good conformability with the counterpart member.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Sliding-Contact Bearings (AREA)
  • Lubricants (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP96928696A 1995-08-29 1996-08-29 Material für gleitflächen Withdrawn EP0860508A4 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP22037595A JPH0967630A (ja) 1995-08-29 1995-08-29 摺動材料
JP220375/95 1995-08-29
PCT/JP1996/002429 WO1997008352A1 (en) 1995-08-29 1996-08-29 Material for sliding surface

Publications (2)

Publication Number Publication Date
EP0860508A1 true EP0860508A1 (de) 1998-08-26
EP0860508A4 EP0860508A4 (de) 1999-12-22

Family

ID=16750145

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96928696A Withdrawn EP0860508A4 (de) 1995-08-29 1996-08-29 Material für gleitflächen

Country Status (3)

Country Link
EP (1) EP0860508A4 (de)
JP (1) JPH0967630A (de)
WO (1) WO1997008352A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102796918A (zh) * 2011-05-27 2012-11-28 中国科学院金属研究所 一种具有抑制液体中蜡的析出和团聚功能的特种合金
EP2292805A4 (de) * 2008-05-09 2013-06-19 Akashi Gohdoh Inc Bronzelegierung, herstellungsverfahren dafür und bronzelegierung umfassendes gleitelement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103710571B (zh) * 2013-12-02 2016-09-14 中航力源液压股份有限公司 一种摩擦副青铜合金材料及其生产工艺
CN104498767A (zh) * 2015-01-20 2015-04-08 铜陵市三圆特种铸造有限责任公司 一种锡铅青铜合金

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5428726A (en) * 1977-08-09 1979-03-03 Tadao Kimura High lead bronze casted rolling material for axle and bearing
DE2747545C2 (de) * 1977-10-22 1987-01-22 Glyco-Metall-Werke Daelen & Loos Gmbh, 6200 Wiesbaden Verwendung einer binären bzw. ternären Kupfer-Blei-Zinn-Legierung für Gleitschichten
JPS569346A (en) * 1979-06-29 1981-01-30 Daido Metal Kogyo Kk Copper base alloy for bearing
JPS5794501A (en) * 1981-09-28 1982-06-12 Taiho Kogyo Co Ltd Sliding material and its manufacture
US4551395A (en) * 1984-09-07 1985-11-05 D.A.B. Industries, Inc. Bearing materials
EP0224619B1 (de) * 1985-11-04 1990-03-28 JPI Transportation Products, Inc. Werkstoffe für Lager
JPH08941B2 (ja) * 1992-03-31 1996-01-10 大同メタル工業株式会社 耐摩耗性摺動合金、摺動部材およびその製造方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2292805A4 (de) * 2008-05-09 2013-06-19 Akashi Gohdoh Inc Bronzelegierung, herstellungsverfahren dafür und bronzelegierung umfassendes gleitelement
CN102796918A (zh) * 2011-05-27 2012-11-28 中国科学院金属研究所 一种具有抑制液体中蜡的析出和团聚功能的特种合金

Also Published As

Publication number Publication date
EP0860508A4 (de) 1999-12-22
WO1997008352A1 (en) 1997-03-06
JPH0967630A (ja) 1997-03-11

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