JPH0443976B2 - - Google Patents
Info
- Publication number
- JPH0443976B2 JPH0443976B2 JP12360286A JP12360286A JPH0443976B2 JP H0443976 B2 JPH0443976 B2 JP H0443976B2 JP 12360286 A JP12360286 A JP 12360286A JP 12360286 A JP12360286 A JP 12360286A JP H0443976 B2 JPH0443976 B2 JP H0443976B2
- Authority
- JP
- Japan
- Prior art keywords
- lead
- sintered
- iron
- sintered alloy
- powder
- 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
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 46
- 229910045601 alloy Inorganic materials 0.000 claims description 37
- 239000000956 alloy Substances 0.000 claims description 37
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 22
- 239000011159 matrix material Substances 0.000 claims description 21
- 229910052976 metal sulfide Inorganic materials 0.000 claims description 18
- 229910052742 iron Inorganic materials 0.000 claims description 14
- 229910052698 phosphorus Inorganic materials 0.000 claims description 11
- 229910000978 Pb alloy Inorganic materials 0.000 claims description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 8
- 235000021355 Stearic acid Nutrition 0.000 claims description 8
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 8
- 239000011574 phosphorus Substances 0.000 claims description 8
- 239000008117 stearic acid Substances 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000005470 impregnation Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 1
- -1 stearic acid compound Chemical class 0.000 claims 1
- 229910052804 chromium Inorganic materials 0.000 description 17
- 239000011651 chromium Substances 0.000 description 17
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 14
- 239000000314 lubricant Substances 0.000 description 10
- 238000005461 lubrication Methods 0.000 description 8
- 239000002994 raw material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005245 sintering Methods 0.000 description 6
- 229910052791 calcium Inorganic materials 0.000 description 5
- 239000011575 calcium Substances 0.000 description 5
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 5
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 description 4
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052961 molybdenite Inorganic materials 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Description
〔産業上の利用分野〕
本発明は、潤滑油を用いないで集電摺動部分に
使用される耐摩性に秀れた鉄系焼結合金、特に、
速度270〜280Km／ｈで走行する高速電気車のパン
タグラフ用摺板として好適な集電摺動用鉄系耐摩
焼結合金の製造法に関するものである。
〔従来の技術〕
現在新幹線用摺板として使用している鉄系耐摩
焼結合金は、鉄粉が主体で潤滑性に欠けるため、
所望の気孔率を有する鉄系焼結合金母体をつく
り、その焼結合金母体中に17〜27％の鉛を含浸さ
せている。しかしながら、このように多量の鉛を
含浸させると、鉛は低融点金属であるため、架線
と摺板とが離間する際の火花放電により溶解され
た鉛が溶出して摺板の表面を荒損するおそれがあ
り、これ等の原因で摺板の摩耗が比較的多くて改
良の余地が残されており、かつ、多量の鉛粉が鉄
道沿線に飛散して公害をおよぼす心配がある。
本発明者は、前記の如き問題点を改善するた
め、鉄粉中に二硫化モリブデン、二硫化タングス
テンなどの金属硫化物を配合してその金属硫化物
により潤滑性能を発揮させ、かつ、鉄系合金中に
80〜150メツシユの粒粉状単体クロームを確りと
抱き込み、粒粉状単体クロームによる耐摩性と金
属硫化物による潤滑性能とを有する鉄系耐摩焼結
合金の製造方法を先に発明した（特許第1009420
号、特公昭54−42332号公報参照）。
この先発明によれば、速度220Km／ｈ程度であ
れば鉛を含浸せしめることなく良好な耐摩性と潤
滑性能とを発揮させることができるが、それより
更に速度270〜280Km／ｈとアツプさせた場合には
耐摩性および潤滑性能が不十分である。
〔発明が解決しようとする問題点〕
本発明は、前記の如き従来技術の問題点に鑑
み、速度270〜280Km／ｈにおいても優秀な耐摩性
を発揮すると共に、摺板および架線の耐久力を著
しく向上させることが出来、これにより一編成の
電車パンタグラフ数を半減することも可能で、電
車の走行中、架線とパンタすり板の摺動に起因す
る摺動騒音公害を低下させることもでき、しかも
鉛公害を環境基準値以下に押えることができる集
電摺動用鉄系耐摩焼結合金を提供せんとするもの
である。
〔問題点を解決するための手段〕
本発明は、前記の如き問題点を解決するため、
重量比にて、単体クローム粒粉15〜25％、二硫化
モリブデン、二硫化タングステン、硫化鉄、硫化
銅、などの金属硫化物1.5〜７％、燐１％以下、
ステアリン酸カルシユーム、ステアリン酸アエン
等１％以下、残部鉄粉よりなる粉末を混合し、こ
れを７〜9T／cm2で圧縮成形した後焼結して約９
％程度の気孔率を有する焼結合金母体をつくり、
その焼結合金母体中に鉛ないし鉛合金を２〜８％
含浸せしめることを特徴とする。
〔作用〕
本発明は、前記の如く鉄粉を主体とし、これに
270〜280Km／ｈの高速度における耐摩性を発揮さ
せるために先発明より更に多量のクロームを配合
して、これを焼結合金母体中に確りと抱込むと共
に、二硫化モリブデン、二硫化タングステン、硫
化鉄、硫化銅、などの金属硫化物を配合してそれ
自体潤滑性能を有すると共にこれらが鉛含浸に際
し濡れ性が劣る焼結合金母体をつくり、その焼結
合金母体に鉛ないし鉛合金を含浸させるので、含
浸鉛量は２−８％と低くおさえられ、クロームに
よる耐摩性と、焼結合金母体中に均一に分布する
金属硫化物による潤滑性能および含浸された鉛な
いし鉛合金の潤滑性能とが両々相俟つて極めて優
秀な耐摩性と潤滑性を発揮すると共に摺板のみな
らず架線の耐久力も顯著に向上させることができ
る。
さらに詳しく云うと、本発明に使用する二硫化
モリブデン、二硫化タングステン、硫化鉄、硫化
銅などの金属硫化物は極めて微細なもので、これ
がステアリン酸エルシユム、ステアリン酸アエン
などのステアリン酸系潤滑剤と、鉄粉、クロー
ム、燐が均一に混合され、加圧成形後焼結の際、
粒粉状クロームは焼結合金の母体中に強く抱き込
まれた状態で均斉に分布されている。そして後述
の試験結果により明らかなように、粒粉状クロー
ムの耐摩性と焼結合金母体中に含有する金属硫化
物、および焼結後含浸された鉛ないし鉛合金の潤
滑性能とが面々相俟つて270〜280Km／ｈの高速時
における極めて優秀な耐摩性と潤滑性能を発揮す
る。
そして前記の如きクロームと鉄粉との配合比に
おいて、金属硫化物の配合量は1.5−７％が適量
であつて1.5％未満ではその効果が少なく、７％
以上になると合金の機械強度が低下する。
ステアリン酸系潤滑剤は、鉄粉、クローム粒粉
15〜25％、金属硫化物系潤滑剤（MoS2WS2FeS
CuS）、燐等と共に配合混合し、７−9T／cm2で加
圧成形する際、既に金属硫化物系潤滑剤が存在す
るので、これらと互に助け合つて目的とする緻密
な圧粉体を成形することができ、クロームを15〜
25％の如く多量に含有させても、押型と圧粉体と
の型離れがよく、かつ、この圧粉体を焼結して鉛
ないし鉛合金を含浸して得た集電摺動用鉄系耐摩
焼結合金の衝撃値、並びに引張強度を増大するこ
とができ、国鉄新幹線で使用されている鉄系焼結
合金摺板の物理特性の規格に合致させることが出
来る。ステアリン酸系潤滑剤の添加量は１％以下
が適量で、１％以上では過剰で、その焼結合金の
物理特性を低下させる。またステアリン酸系潤滑
剤の添加量は金属硫化物が比較的多量の６−７％
の場合は、その添加量を減じて零に近かずけても
成形圧力9T／cm2以上にすればその鉄系焼結摺板
を国鉄新幹線の物理特性の規格内に納めることが
出来る。
燐は、前記、鉄、クローム、金属硫化物、ステ
アリン酸系潤滑剤の混合粉よりなる成形体を焼結
する際、その強い脱酸作用によつて鉄粉を浄化す
ると共に、焼結の初期に粒粉表面に形成される
Fe3Ｐ−Fe共晶組成の液相量を増して、焼結体中
に耐摩性の目的で混合しているクロームと潤滑性
増強の目的で混合している金属硫化物とを確りと
抱き込んだ状態で収縮し、緻密化を促進させるも
のである。
そして燐の配合量は１％以上になるとかえつて
脆弱となる。また燐は焼結炉内の還元雰囲気が完
全に近くかつ原料が清浄であればその配合量を減
じても前記の作用効果を発揮させることができ
る。
粒粉状クロームは、80〜150メツシユのものを
使用し、前記の如く、ステアリン酸系潤滑剤を混
入して７−9T／cm2で加圧成形することに起因す
る緻密化、および燐の添加焼結による緻密化され
た鉄系焼結合金中にクローム単体の固体として脱
落することなく強く抱き込まれた状態で存在し、
単体クローム特有の耐錆、耐摩性能を発揮する。
その含有量は15％以下では高速270〜280Km／ｈに
は耐摩性の向上には不十分であり、25％以上では
その含有焼結合金の機械強度を低下させる。
また、本発明においては、前述の如く焼結合金
母体中に鉛ないし鉛合金を含浸せしめるのである
が、その際焼結母体中には既に潤滑剤である金属
硫化物が含有されているので、鉛含浸に際し濡性
が劣つていて鉛の含浸をある程度妨げ、これと混
合粉の成形圧７−9T／cm2に調整することと相俟
つて鉛含浸率を２〜８％にすることができる。な
お、鉛含浸に際し必要に応じ焼結合金母体を再加
圧することもある。鉛の含有量は２％未満ではク
ロームが15〜25％であるので潤滑性の効果が不十
分であり、８％以上は不必要であるばかりでな
く、これ以上の鉛を含浸させると摺板の耐久力が
劣り、かつ、鉛公害の環境基準を超すおそれがあ
る。
なお、上記Fe−Cr−Ｐ−MoS2（WS2．FeS.
CuS.）−Pbの焼結合金のうち、鉄の小量をモリブ
デン、タングステン、ニツケル、チタン、銅、炭
素、クローム、コバルトなどの単体またはこれら
の化合物の一種又は数種におきかえても摺板およ
び架線の耐摩性に大きな影響がない。従つて鉄の
小量を前記の如き金属またはその化合物におきか
えることも本発明に包含される。また以下の実施
例において鉛に代えて鉛合金を含浸させることも
でき、この場合も当然本発明に包含される。
以下本発明の具体例を各実施例について説明す
る。
実施例 １
重量比にて、80−150メツシユの単体クローム
（以下単にクロームという）、15％、Cu0.5％、
Ni0.7％、MoS2７％、ステアリン酸Ca0.1％、残
部鉄粉の割合で各原料を配合し、混和機により均
一に混和した後9T／cm2で圧縮成形し、還元雰囲
気中1150℃−30分で焼結した。得られた焼結合金
母体を鉛単体の固体と一緒に真空炉に設置し、温
度700℃−120分で鉛が5.2％含浸された製品を得
た。
実施例 ２
重量比にて、Cr17％、FeTi0.5％、FeW1％、
MoS2５％、CuS1％、P0.4％、ステアリン酸
Ca0.3％、残部鉄粉の割合で各原料を配合し、こ
れを混和機により均一に混和した後8T／cm2で圧
縮成形し、還元雰囲気中1150℃−30分で焼結し
た。得られた焼結合金母体を鉛単体と一緒に真空
炉に設置し、実施例１と同様にして鉛が3.5％含
浸された製品を得た。
実施例 ３
重量比にて、Cr16％、MoS21.5％、P0.5％、ス
テアリン酸Ca0.7％、残部鉄粉の割合で各原料を
配合し、混和機により均一に混和した後7T／cm2
で圧縮成形し、還元雰囲気中1150℃−30分で焼結
した。得られた焼結合金母体を鉛単体と一緒に真
空炉に設置し、実施例１と同様にして鉛が６％含
浸された製品を得た。
実施例 ４
重量比にてCr20％、FeMo1％、MoS2４％、
WS20.5％、ステアリン酸Ca0.6％、P0.9％、残部
鉄粉の割合で各原料を配合し、混和機により均一
に混和した後8T／cm2で圧縮成形し、還元雰囲気
中1150℃−30分で焼結した。得られた焼結合金母
体を鉛単体と一緒に真空炉に設置し、実施例１と
同様にして鉛が4.5％含浸された製品を得た。
実施例 ５
重量比にて、Cr23％、P0.7％、MoS2３％、
Cu2％、C0.1％、ステアリン酸Zn1％、残部鉄粉
の割合で各原料を配合し、混合機により均一に混
和した後8T／cm2で圧縮成形し、還元雰囲気中
1150℃−30分で焼結した。得られた焼結合金母体
を鉛単体の固体と一緒に真空炉に設置し、実施例
１と同様にして鉛が５％含浸された製品を得た。
実施例 ６
重量比にて、Cr25％、P0.6％、MoS2４％、ス
テアリン酸Ca0.5％、残部鉄粉の割合で各原料を
配合し、混合機により均一に混和した後8T／cm2
で圧縮成形し、還元雰囲気中1150℃−30分で焼結
した。得られた焼結結合母体を鉛単体の固体と一
緒に真空炉に設置し、実施例１と同様にして鉛が
７％含浸された製品を得た。
上記各実施例により得た焼結合金の物理特性を
示すと第１表のとおりである。
[Industrial Application Field] The present invention relates to a ferrous sintered alloy with excellent wear resistance that is used in current collector sliding parts without using lubricating oil, and in particular,
The present invention relates to a method for producing an iron-based wear-resistant alloy for current collector sliding plates suitable for pantograph sliding plates for high-speed electric cars running at speeds of 270 to 280 km/h. [Conventional technology] The iron-based wear-resistant alloy currently used for Shinkansen sliding plates is mainly composed of iron powder and lacks lubricity.
An iron-based sintered alloy matrix having a desired porosity is created, and 17 to 27% lead is impregnated into the sintered alloy matrix. However, when a large amount of lead is impregnated in this way, since lead is a metal with a low melting point, the molten lead elutes due to spark discharge when the overhead wire and the sliding plate are separated, and the surface of the sliding plate becomes rough. Due to these reasons, there is a relatively large amount of wear on the sliding plates, leaving room for improvement, and there is also a concern that a large amount of lead powder may scatter along the railroad tracks and cause pollution. In order to improve the above-mentioned problems, the inventors of the present invention have formulated metal sulfides such as molybdenum disulfide and tungsten disulfide into iron powder to exhibit lubricating performance by the metal sulfides, and iron-based in alloy
He was the first to invent a method for manufacturing an iron-based wear-resistant alloy that tightly incorporates 80 to 150 meshes of granular elemental chromium and has wear resistance due to the granular elemental chromium and lubrication performance due to metal sulfide (patented). No. 1009420
(Refer to Special Publication No. 54-42332). According to the present invention, it is possible to exhibit good wear resistance and lubrication performance without lead impregnation at a speed of about 220 km/h, but when the speed is further increased to 270 to 280 km/h. has insufficient wear resistance and lubrication performance. [Problems to be Solved by the Invention] In view of the problems of the prior art as described above, the present invention exhibits excellent wear resistance even at speeds of 270 to 280 km/h, and improves the durability of the sliding plate and overhead wire. This makes it possible to reduce the number of train pantographs in one train set by half, and also to reduce the noise pollution caused by sliding between the overhead wire and the pantograph board while the train is running. Moreover, it is an object of the present invention to provide an iron-based wear-resistant alloy for current collector sliding that can suppress lead pollution to below environmental standard values. [Means for solving the problems] In order to solve the above problems, the present invention has the following features:
By weight, elemental chromium powder 15-25%, metal sulfides such as molybdenum disulfide, tungsten disulfide, iron sulfide, copper sulfide, etc. 1.5-7%, phosphorus 1% or less,
A powder consisting of 1% or less of calcium stearate, aene stearate, etc., and the balance iron powder is mixed, and this is compression molded at 7 to 9 T/cm 2 and then sintered to form a powder of about 9
A sintered alloy matrix with a porosity of about 10% is made,
2 to 8% lead or lead alloy in the sintered alloy matrix
It is characterized by being impregnated. [Function] As mentioned above, the present invention mainly consists of iron powder, and
In order to exhibit wear resistance at high speeds of 270 to 280 km/h, a larger amount of chromium is blended than in the previous invention, and this is firmly incorporated into the sintered alloy matrix, and molybdenum disulfide, tungsten disulfide, Metal sulfides such as iron sulfide and copper sulfide are blended to create a sintered alloy matrix that has lubricating properties in itself and has poor wettability when impregnated with lead, and the sintered alloy matrix is impregnated with lead or lead alloy. Therefore, the amount of impregnated lead is kept low at 2-8%, and the wear resistance due to chromium, the lubrication performance due to the metal sulfide uniformly distributed in the sintered alloy matrix, and the lubrication performance of impregnated lead or lead alloy. Together, they exhibit extremely excellent wear resistance and lubricity, and the durability of not only the sliding plates but also the overhead wires can be significantly improved. More specifically, the metal sulfides used in the present invention, such as molybdenum disulfide, tungsten disulfide, iron sulfide, and copper sulfide, are extremely fine, and these metal sulfides are used in stearic acid-based lubricants such as erucium stearate and aene stearate. Then, iron powder, chromium, and phosphorus are mixed uniformly, and during sintering after pressure forming,
The granular chromium is uniformly distributed in a state where it is strongly embedded in the matrix of the sintered alloy. As is clear from the test results described below, the wear resistance of granular chromium, the metal sulfide contained in the sintered alloy matrix, and the lubrication performance of lead or lead alloy impregnated after sintering are mutually related. It exhibits extremely excellent wear resistance and lubrication performance at high speeds of 270 to 280 km/h. In the above-mentioned mixing ratio of chromium and iron powder, the appropriate amount of metal sulfide is 1.5-7%, and if it is less than 1.5%, the effect is small;
If it exceeds this amount, the mechanical strength of the alloy will decrease. Stearic acid-based lubricants include iron powder and chrome powder.
15-25%, metal sulfide lubricants (MoS 2 WS 2 FeS
When the metal sulfide lubricant is already present when it is mixed with CuS, phosphorus, etc. and pressure-formed at 7-9 T/cm 2 , the metal sulfide lubricant helps each other to form the desired compact compact. Can be molded, chrome 15 ~
Even when the powder is contained in a large amount such as 25%, the pressing die and the green compact are easily separated from each other, and the green compact is sintered and impregnated with lead or a lead alloy. The impact value and tensile strength of the wear-resistant sintered alloy can be increased, and the physical properties of the iron-based sintered alloy sliding plate used in the Japan National Railways Shinkansen can be made to meet the standards. The appropriate amount of the stearic acid lubricant to be added is 1% or less; 1% or more is excessive and deteriorates the physical properties of the sintered alloy. In addition, the amount of stearic acid-based lubricants added is 6-7%, which contains a relatively large amount of metal sulfide.
In this case, even if the additive amount is reduced to near zero, the iron-based sintered sliding plate can be kept within the physical property specifications of the Japanese National Railways Shinkansen by increasing the molding pressure to 9 T/cm 2 or higher. Phosphorus purifies the iron powder with its strong deoxidizing action when sintering the compact made of the mixed powder of iron, chromium, metal sulfide, and stearic acid lubricant, and also cleans the iron powder during the initial stage of sintering. formed on the surface of grains
By increasing the amount of the liquid phase of the Fe 3 P-Fe eutectic composition, we can firmly hold the chromium mixed in the sintered body for the purpose of wear resistance and the metal sulfide mixed for the purpose of increasing lubricity. It contracts in a dense state and promotes densification. If the amount of phosphorus added exceeds 1%, it becomes brittle. Furthermore, if the reducing atmosphere in the sintering furnace is nearly perfect and the raw materials are clean, the above effects can be achieved even if the amount of phosphorus added is reduced. The granular chromium used is one with a mesh size of 80 to 150, and as mentioned above, it is densified due to mixing with a stearic acid lubricant and press-molded at 7-9 T/cm 2 , and phosphorus is removed. Chromium exists in a densified iron-based sintered alloy through additive sintering as a single chromium solid that is strongly embedded without falling off.
Demonstrates the rust and wear resistance properties unique to single chrome.
If the content is less than 15%, it is insufficient to improve wear resistance at high speeds of 270 to 280 km/h, and if it is more than 25%, the mechanical strength of the sintered alloy containing it is reduced. Furthermore, in the present invention, the sintered alloy matrix is impregnated with lead or lead alloy as described above, but at this time, since the sintered alloy matrix already contains metal sulfide as a lubricant, During lead impregnation, poor wettability hinders lead impregnation to some extent, and by combining this and adjusting the molding pressure of the mixed powder to 7-9T/ cm2 , it is possible to achieve a lead impregnation rate of 2-8%. can. Note that during lead impregnation, the sintered alloy matrix may be re-pressurized if necessary. If the lead content is less than 2%, the lubricity effect will be insufficient since chromium is 15 to 25%, and if it is more than 8%, it is not only unnecessary, but if more lead is impregnated, the sliding plate will deteriorate. has poor durability and may exceed environmental standards for lead pollution. In addition, the above Fe-Cr-P-MoS 2 (WS 2 .FeS.
CuS.)-Pb sintered alloy, replacing a small amount of iron with molybdenum, tungsten, nickel, titanium, copper, carbon, chromium, cobalt, etc. or one or more of these compounds can also be used as a sliding board. and has no significant effect on the wear resistance of the overhead wire. Therefore, the present invention also includes replacing a small amount of iron with the above-mentioned metals or compounds thereof. Further, in the following examples, a lead alloy can be impregnated instead of lead, and this case is also naturally included in the present invention. Hereinafter, specific examples of the present invention will be described for each embodiment. Example 1 In terms of weight ratio, 80-150 mesh of elemental chromium (hereinafter simply referred to as chrome), 15%, Cu0.5%,
The raw materials were blended in the proportions of 0.7% Ni, 7% MoS 2 , 0.1% Ca stearate, and the balance iron powder, and after uniformly mixing with a mixer, compression molding was performed at 9T/cm 2 in a reducing atmosphere at 1150 Sintered at −30 min. The obtained sintered alloy matrix was placed in a vacuum furnace together with a solid lead element, and a product impregnated with 5.2% lead was obtained at a temperature of 700°C for 120 minutes. Example 2 Weight ratio: Cr17%, FeTi0.5%, FeW1%,
MoS2 5%, CuS1%, P0.4%, stearic acid
Each raw material was blended at a ratio of 0.3% Ca and the balance was iron powder, and the mixture was uniformly mixed using a mixer, compression molded at 8 T/cm 2 , and sintered at 1150° C. for 30 minutes in a reducing atmosphere. The obtained sintered alloy matrix was placed in a vacuum furnace together with lead alone, and a product impregnated with 3.5% lead was obtained in the same manner as in Example 1. Example 3 Each raw material was mixed in a weight ratio of 16% Cr, 1.5% MoS 2 , 0.5% P, 0.7% Ca stearate, and the balance was iron powder, and after uniformly mixing with a mixer, 7T/ cm2
It was compression molded and sintered at 1150°C for 30 minutes in a reducing atmosphere. The obtained sintered alloy matrix was placed in a vacuum furnace together with lead alone, and in the same manner as in Example 1, a product impregnated with 6% lead was obtained. Example 4 Weight ratio: Cr20%, FeMo1%, MoS 2 4%,
Each raw material was blended in the proportions of WS 2 0.5%, Ca stearate 0.6%, P 0.9%, and the balance iron powder, mixed uniformly with a mixer, compression molded at 8T/cm 2 , and molded at 1150 °C in a reducing atmosphere. Sintered at −30 min. The obtained sintered alloy matrix was placed in a vacuum furnace together with lead alone, and a product impregnated with 4.5% lead was obtained in the same manner as in Example 1. Example 5 In terms of weight ratio, Cr23%, P0.7%, MoS 2 3%,
The raw materials were mixed in the proportions of 2% Cu, 0.1% C, 1% Zn stearate, and the balance iron powder, mixed uniformly in a mixer, and then compression molded at 8T/cm 2 in a reducing atmosphere.
Sintered at 1150°C for 30 minutes. The obtained sintered alloy matrix was placed in a vacuum furnace together with a solid lead element, and a product impregnated with 5% lead was obtained in the same manner as in Example 1. Example 6 Each raw material was mixed in a weight ratio of 25% Cr, 0.6% P, 4% MoS 2 , 0.5% Ca stearate, and the balance was iron powder, and after uniformly mixing with a mixer, 8T/ cm2
It was compression molded and sintered at 1150°C for 30 minutes in a reducing atmosphere. The obtained sintered bonded matrix was placed in a vacuum furnace together with a solid lead element, and a product impregnated with 7% lead was obtained in the same manner as in Example 1. Table 1 shows the physical properties of the sintered alloys obtained in each of the above examples.
【表】
また、上記各実施例１ないし６により得た焼結
合金より切出して得た各試験片、および現在国鉄
新幹線（速度220Km／ｈ）で使用している鉄系焼
結合金摺板よりなる試験片10×25×90mmを回転式
集電摺動試験機に取付け、押圧力７Kg、通電電流
AC150A、摺動速度75Km／ｈ、60分間無潤滑でト
ロリー線に摺動させ、その時の各試験片の比摩耗
率、相手方トロリー線の摩耗厚mm、試験片の温度
上昇を測定した。その結果を第２表に示す。[Table] Also, test pieces cut from the sintered alloys obtained in each of Examples 1 to 6 above, and iron-based sintered alloy sliding plates currently used on the Japanese National Railways Shinkansen (speed 220 km/h). A test piece of 10 x 25 x 90 mm was attached to a rotating current collector sliding tester, and the pressing force was 7 kg and the current was applied.
The test pieces were slid on a trolley wire using AC150A at a sliding speed of 75 km/h for 60 minutes without lubrication, and the specific wear rate of each test piece, the wear thickness mm of the other trolley wire, and the temperature rise of the test piece were measured. The results are shown in Table 2.
以上述べたように、本発明によれば、摺板の耐
摩性を顕著に向上させると共に、その摺面が黒褐
色の平滑で光沢があり、かつ摺板温度上昇も低い
ので、相手方架線の摺動表面の損傷と摩耗を顕著
に減少せしめることができる効果があり、270〜
280Km／ｈの高速電気車のパンタグラフ用摺板と
して有益である。
As described above, according to the present invention, the abrasion resistance of the sliding plate is significantly improved, and the sliding surface is smooth and glossy with a blackish brown color, and the temperature rise of the sliding plate is low. It has the effect of significantly reducing surface damage and wear.
It is useful as a sliding board for pantographs on high-speed electric cars running at 280 km/h.
Claims (1)
属硫化物1.5〜７％、燐１％以下、ステアリン酸
系化合物１％以下、残部鉄粉よりなる粉末材料を
混合圧縮成形後焼結して焼結合金母体をつくり、
その焼結合金母体中に鉛ないし鉛合金を２〜８％
含浸せしめることを特徴とする集電摺動用鉄系耐
摩焼結合金の製造法。1 By weight, a powder material consisting of 15 to 25% elemental chromium powder, 1.5 to 7% metal sulfide, 1% or less phosphorus, 1% or less stearic acid compound, and the balance iron powder is mixed, compression molded, and then sintered. to create a sintered alloy matrix,
2 to 8% lead or lead alloy in the sintered alloy matrix
A method for producing an iron-based wear-resistant alloy for current collector sliding, characterized by impregnation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12360286A JPS62284036A (en) | 1986-05-30 | 1986-05-30 | Production of wear resistant sintered ferrous alloy for sliding for current collection use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12360286A JPS62284036A (en) | 1986-05-30 | 1986-05-30 | Production of wear resistant sintered ferrous alloy for sliding for current collection use |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62284036A JPS62284036A (en) | 1987-12-09 |
| JPH0443976B2 true JPH0443976B2 (en) | 1992-07-20 |
Family
ID=14864673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12360286A Granted JPS62284036A (en) | 1986-05-30 | 1986-05-30 | Production of wear resistant sintered ferrous alloy for sliding for current collection use |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62284036A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2567960B2 (en) * | 1989-11-28 | 1996-12-25 | 帝国カーボン工業 株式会社 | Manufacturing method of ferrous wear-resistant sintered alloy for current collecting sliding |
| JPH0772318B2 (en) * | 1990-08-30 | 1995-08-02 | 帝国カーボン工業株式会社 | Manufacturing method of ferrous wear-resistant sintered alloy for current collecting sliding |
| JP2511225B2 (en) * | 1992-05-21 | 1996-06-26 | 帝国カーボン工業株式会社 | Manufacturing method of wear-resistant sintered alloy for sliding current collector |
| CN107099754A (en) * | 2017-05-22 | 2017-08-29 | 东风汽车零部件（集团）有限公司东风粉末冶金公司 | A kind of natural gas engine valve guide bushing material |
| CN107245670A (en) * | 2017-05-22 | 2017-10-13 | 东风汽车零部件（集团）有限公司东风粉末冶金公司 | A kind of Diesel engine valve guide bushing material |
-
1986
- 1986-05-30 JP JP12360286A patent/JPS62284036A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62284036A (en) | 1987-12-09 |
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