JPH086156B2 - Sintered metal product and manufacturing method thereof - Google Patents
Sintered metal product and manufacturing method thereofInfo
- Publication number
- JPH086156B2 JPH086156B2 JP22470488A JP22470488A JPH086156B2 JP H086156 B2 JPH086156 B2 JP H086156B2 JP 22470488 A JP22470488 A JP 22470488A JP 22470488 A JP22470488 A JP 22470488A JP H086156 B2 JPH086156 B2 JP H086156B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- sintered
- bronze
- mainly composed
- thickness
- 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 - Lifetime
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Description
【発明の詳細な説明】 「発明の目的」 本発明は焼結金属製品およびその製造法に係り、鉄を
主体としつつもその表面全体を、耐食性に優れ、かつ軸
材に対するなじみ性も良好なCu−Sn−Znを主体とする銅
合金（砲金）で被覆した焼結金属製品およびその好まし
い製造法を提供しようとするものである。DETAILED DESCRIPTION OF THE INVENTION “Object of the Invention” The present invention relates to a sintered metal product and a method for manufacturing the same, and is mainly composed of iron, but the entire surface thereof is excellent in corrosion resistance and has good compatibility with a shaft material. An object of the present invention is to provide a sintered metal product coated with a copper alloy (gun metal) mainly composed of Cu-Sn-Zn and a preferable manufacturing method thereof.
（産業上の利用分野） 含油軸受その他の焼結金属製品およびその製造技術。(Industrial application field) Oil-impregnated bearings and other sintered metal products and their manufacturing technology.
（従来の技術） 含油軸受その他の焼結金属製品を得るために鉄粉、銅
粉その他の金属粉を用い圧粉成形してから焼結して製品
とすることは従来から普通に実施されている。即ちこの
ような従来のものにおいては用いられた金属粉の如何に
より得られた製品の特性がほぼ決定される。つまり鉄粉
末を用いたものにあっては、鉄が水や空気中の水蒸気と
反応して一般的に言う赤錆を発生し耐食性が不十分であ
るという致命的欠陥を有している。また軸受材の観点か
らは軸材とのなじみ性に劣るという欠点も有る。しか
し、鉄は最も安価な金属であり、強度的に優れていると
いう長所が有る。これに対し銅を主体とした銅系焼結体
では一般に鉄系の場合と反対であって、軸受材料として
は軸受特性、耐食性ともに最高に優れた材料であり、従
来から高級軸受材として多用されている。しかし反面主
成分が銅および錫から成るため高価とならざるを得ない
という欠点が有る。(Prior Art) It has been common practice to press-compact iron powder, copper powder and other metal powders and then sinter them to obtain a product to obtain oil-impregnated bearings and other sintered metal products. There is. That is, in such a conventional product, the characteristics of the obtained product are almost determined depending on the metal powder used. That is, in the case of using the iron powder, there is a fatal defect that iron reacts with water or water vapor in the air to generate generally called red rust and the corrosion resistance is insufficient. Further, from the viewpoint of the bearing material, there is a drawback that the compatibility with the shaft material is poor. However, iron is the cheapest metal and has the advantage of being excellent in strength. On the other hand, a copper-based sintered body mainly composed of copper is generally the opposite of the case of an iron-based sintered body, and is a material with the best bearing properties and corrosion resistance as a bearing material. ing. On the other hand, however, it has a drawback that it is expensive because its main components are copper and tin.
そこでこのような従来一般の鉄系製品および銅系製品
の欠点をカバーし、その長所を活用することについても
それなりの提案がなされている。即ちその若干例を示す
と以下の如くである。Therefore, some proposals have been made to cover such drawbacks of conventional iron-based products and copper-based products and utilize their advantages. That is, some examples are as follows.
特公昭38−22103号 銅あるいは銅−錫混合圧粉体をZn雰囲気中で焼結し亜
鉛を含有した銅系焼結合金を得るもの。Japanese Examined Patent Publication No. S22-22103 A copper-based sintered alloy containing zinc is obtained by sintering copper or copper-tin mixed green compacts in a Zn atmosphere.
特開昭53−146203号（特公昭56−4140号） 鉄粉を主体とし、これに３〜30％の銅と適当な滑材を
混合したものを圧粉成形し雰囲気ガスを通過せしめ得る
容器内における酸化亜鉛粉末中に埋め、水素ガスまたは
還元性ガス中で焼結するもの。JP-A-53-146203 (Japanese Patent Publication No. 56-4140) A container mainly composed of iron powder, which is mixed with 3 to 30% of copper and a suitable lubricant and is compacted to allow passage of atmospheric gas. Filled with zinc oxide powder inside and sintered in hydrogen gas or reducing gas.
特開昭56−156703号公報 銅を主体とし、これにZnまたはSnといった金属分を含
有させた銅系合金の粉末を鉄粉に添加混合したものを圧
粉成形し気化したZnガス雰囲気で焼結するもの。JP, 56-156703, A A mixture of a powder of a copper alloy mainly composed of copper and containing a metal component such as Zn or Sn is mixed with iron powder, and the mixture is compacted and baked in a vaporized Zn gas atmosphere. Things to tie.
特開昭56−51554号公報 鉄、銅、亜鉛の金属粉体を混合し圧粉成形したものを
炭粉中で焼結するもの（出願中）、および鉄粉と銅−亜
鉛合金粉を焼結し所定の含油率を有するようにするもの
（昭和55年８月６日補正後） （発明が解決しようとする課題） 上記したのものは銅または銅に若干の錫を含有した
ものをベースとしてZnを含有させるものであって、それ
なりに高強度であっても相当に高価とならざるを得な
い。Patent Document 1: JP-A-56-51554 JP Metallic powder of iron, copper and zinc is mixed and compacted and sintered in charcoal powder (pending), and iron powder and copper-zinc alloy powder are fired. Those that are tied to have a predetermined oil content (after amendment on August 6, 1980) (Problems to be solved by the invention) The above is based on copper or copper containing some tin. However, even if the strength is reasonably high, the cost is inevitably high.
これに対し〜のものは鉄粉を用いるものであるか
ら比較的安価に得ることができる長所は有るが、混入さ
れた鉄粉は銅合金に被覆されることが無いため表面に露
出せざるを得ず、従って前述したように著しく耐食性に
劣ることとなる。On the other hand, the following items have the advantage that they can be obtained at a relatively low cost because they use iron powder, but the mixed iron powder must be exposed on the surface because it is not covered by the copper alloy. Therefore, as described above, the corrosion resistance is remarkably inferior.
「発明の構成」 （課題を解決するための手段） 1. Fe:30〜80wt％、Cu:15〜65wt％、Sn:1〜14wt％およ
びPbまたはSb、Biの何れか１種または２種以上を0.5〜4
wt％含有した圧粉成形焼結体であって、該焼結体の表面
が厚さ５〜100μｍのCu−Sn−Znを主体とする合金層で
被覆されたことを特徴とする焼結金属製品。"Structure of the Invention" (Means for Solving the Problems) 1. Fe: 30 to 80 wt%, Cu: 15 to 65 wt%, Sn: 1 to 14 wt% and any one or two of Pb or Sb, Bi 0.5 ~ 4
A compacted sintered compact containing wt%, characterized in that the surface of the sintered compact is covered with an alloy layer mainly composed of Cu-Sn-Zn and having a thickness of 5 to 100 m. Product.
2. 鉄粉を主体とし、これに青銅粉を配合すると共にP
b、Sb、Biの１種または２種以上を配合した原料粉を圧
粉成形し、該圧粉成形体を気化したZnが存在する還元雰
囲気中で焼結処理し、前記圧粉成形体の表面にCu−Sn−
Znを主体とした銅合金による被覆層を厚さ５〜100μｍ
被覆せしめることを特徴とする焼結金属製品の製造法。2. Iron powder is the main component, and bronze powder is added to this, and P
A raw material powder containing one or more of b, Sb, and Bi mixed is compacted, and the compact is sintered in a reducing atmosphere containing vaporized Zn. Cu-Sn- on the surface
The coating layer made of copper alloy mainly composed of Zn has a thickness of 5 to 100 μm.
A method for producing a sintered metal product, which comprises coating.
3. 鉄粉を主体とし、これにPb、Sb、Biの１種または２
種以上を含有した青銅粉を混合した原料粉を準備し、該
原料粉を圧粉成形し得られた成形体を気化したZnが存在
する還元雰囲気中で焼結処理し、前記圧粉成形体の表面
にCu−Sn−Znを主体とした銅合金による被覆層を厚さ５
〜100μｍ被覆せしめることを特徴とする焼結金属製品
の製造法。3. Mainly iron powder, with one or two of Pb, Sb, Bi
A raw material powder prepared by mixing a bronze powder containing at least one kind of powder is prepared, and a compact obtained by compacting the raw material powder is sintered in a reducing atmosphere containing vaporized Zn, and the compact is compacted. The thickness of the coating layer made of copper alloy mainly composed of Cu-Sn-Zn on the surface of
A method for producing a sintered metal product, which comprises coating with a thickness of up to 100 μm.
（作用） 鉄粉を主体とし、Fe:30〜80wt％の焼結金属製品であ
るから充分な低コスト性が得られる。(Function) Since iron powder is the main component and a sintered metal product of Fe: 30 to 80 wt%, sufficient cost reduction can be obtained.
Cu:15〜65wt％、Sn:1〜14wt％とPbなどの低融点金属
0.5〜4wt％を含有し、その表面に厚さ５〜100μｍのCu
−Sn−Zn合金による被覆層を形成することにより、軸材
などに対するなじみや耐食性を充分に向上する。Cu: 15-65wt%, Sn: 1-14wt% and low melting point metals such as Pb
Cu containing 0.5 to 4 wt% and having a thickness of 5 to 100 μm on the surface
By forming a coating layer of -Sn-Zn alloy, the familiarity with the shaft material and the corrosion resistance are sufficiently improved.
主体たる鉄粉が30％未満では銅または錫が多くなるこ
とにより高価にならざるを得ず、安価であるという所期
の目的を達成できない。しかもFe粉末による骨格的強度
が得られず、またFe分が80％を超えると銅合金成分の量
が不足するので、成程Pdなどを用いて気体Znによる還元
性雰囲気で処理しても十分な被覆を得ることができな
い。If the main iron powder is less than 30%, the amount of copper or tin is increased, and thus the price becomes expensive, and the intended purpose of being inexpensive cannot be achieved. Moreover, the skeletal strength of Fe powder cannot be obtained, and if the Fe content exceeds 80%, the amount of the copper alloy component will be insufficient, so it is sufficient to treat it in a reducing atmosphere with gaseous Zn using Pd, etc. To obtain a good coating.
銅については15％以下では効果が薄く、一方65％以上
では高価となる。For copper, less than 15% is less effective, while more than 65% is expensive.
錫も0.5％以下では効果が薄く、14％を超えて添加し
てもその効果は変わらないので上限を14％とした。The effect of tin is less than 0.5%, and the effect does not change even if added in excess of 14%, so the upper limit was made 14%.
本発明の必須要件であるPbまたはSb、Biの添加量につ
いては、１種または２種以上を0.5〜４％添加するもの
で、0.5％以下では特にFe分が70〜80％のように多量な
場合効果が乏しく、一方４％を超えて添加すると表層の
外観が黒ずんでくるので外観的に好ましくないものとな
る。Regarding the added amount of Pb or Sb, Bi which is an essential requirement of the present invention, 0.5 to 4% of one kind or two or more kinds is added, and if it is 0.5% or less, a large amount of Fe content is 70 to 80%. In that case, the effect is poor. On the other hand, if it is added in excess of 4%, the appearance of the surface layer becomes dark, which is not desirable in appearance.
本発明では、これらの非鉄金属に亜鉛分を用い被覆層
の合金層を形成して、はじめて本発明の効果が得られ
る。即ち亜鉛は気相状態で反応してCu−Sn−Znを主体と
した銅合金を形成し外周面と被覆することにより優れた
特性が得られる。In the present invention, the effect of the present invention can be obtained only after forming the alloy layer of the coating layer by using zinc content in these non-ferrous metals. That is, zinc reacts in the gas phase to form a copper alloy mainly composed of Cu-Sn-Zn and coats the outer peripheral surface with excellent properties.
焼結によって製品表面に被覆形成される合金層の膜厚
については圧粉体に混合された青銅粉量、Pbなどの量お
よび焼結時間によって適宜に制御することができる。こ
の合金層膜厚が最低５μｍ以下では軸材とのなじみや耐
食性の改善が不充分となり、一方100μｍ以上となると
青銅粉や焼結時間が大となり、経済的不利をもたらす。The film thickness of the alloy layer coated on the surface of the product by sintering can be appropriately controlled depending on the amount of bronze powder mixed with the green compact, the amount of Pb and the like, and the sintering time. When the thickness of the alloy layer is at least 5 μm or less, the compatibility with the shaft material and the improvement of the corrosion resistance are insufficient, while when it is 100 μm or more, the bronze powder and the sintering time become long, which is economically disadvantageous.
（実施例） 上記したような本発明によるものの具体的実施態様を
添附図面を適宜に参照して説明すると、本発明による焼
結金属体として軸受の１例を示しているのが第１図であ
って、顕微鏡観察のためのサンプルを適切に得るために
軸受１と軸２とを共に示しているが、本発明による軸受
１は鉄粉を主材とし、これに青銅粉と鉛粉とを配合した
原料粉を圧粉成形して焼結したものであるが、その内
面、即ち軸受面には厚さが少くとも８μｍ以上であるCu
−Sn−Znを主体とする合金層３を均一に被覆形成してい
て、このような合金層３に対し前記軸材２が摺動するよ
うに構成される。(Example) A specific embodiment of the present invention as described above will be described with reference to the accompanying drawings as appropriate. FIG. 1 shows an example of a bearing as a sintered metal body according to the present invention. Therefore, the bearing 1 and the shaft 2 are both shown in order to appropriately obtain a sample for microscopic observation, but the bearing 1 according to the present invention is mainly composed of iron powder, and bronze powder and lead powder are added thereto. The raw material compounded is compacted and sintered, and the inner surface, that is, the bearing surface, has a thickness of at least 8 μm or more.
An alloy layer 3 mainly composed of -Sn-Zn is uniformly coated and formed, and the shaft member 2 slides on such an alloy layer 3.
上記のような本発明焼結金属体は、Feを主体として、
これに青銅と鉛などの低融点金属を配合した原料粉によ
る圧粉成形体であって、Feは30〜80wt％、Cuは15〜65wt
％、Snが１〜14wt％、PbまたはSb、Biの何れか１種また
は２種以上が0.5〜4wt％の組成を有し、前記Cu−Sn−Zn
合金による被覆の厚さは５〜100μｍである。The sintered metal body of the present invention as described above, mainly Fe,
It is a powder compact made from raw material powder that is a mixture of low melting point metal such as bronze and lead. Fe is 30 to 80 wt% and Cu is 15 to 65 wt.
%, Sn is 1 to 14 wt%, Pb or one or more of Sb and Bi has a composition of 0.5 to 4 wt%, and Cu—Sn—Zn
The alloy coating has a thickness of 5 to 100 μm.
Cuが15wt％未満、Snが1wt％未満、Pbなどが0.5wt％未
満ではFeが相対的に80wt％を超えるようなこととなり、
Zn雰囲気での焼結時に適切なCu−Sn−Znを主体とする合
金被覆を得ることができない。If Cu is less than 15 wt%, Sn is less than 1 wt%, and Pb is less than 0.5 wt%, Fe will relatively exceed 80 wt%.
It is not possible to obtain an appropriate Cu-Sn-Zn-based alloy coating during sintering in a Zn atmosphere.
一方、Cuが65wt％以上、Snが8wt％以上、Pbなどが4wt
％以上になると、相対的にFeが不足し、低コスト性や強
度に欠けることとなる。On the other hand, Cu is 65 wt% or more, Sn is 8 wt% or more, and Pb is 4 wt%
%, The Fe content becomes relatively insufficient, resulting in low cost and low strength.
前記したような本発明焼結合金の製造は、鉄粉を主体
とし、これに青銅粉とPbなどの低融点金属粉を配合した
原料粉を圧粉成形し、これをZn雰囲気中で焼結するが、
この焼結の様相については第２図に示す通りであって、
酸化亜鉛（ZnO）などの気化Zn発生源11を収容した容器1
0内において適宜に支持台13を用い、前記気体Zn発生源1
1より離隔した成形体収容部12を設定し、該収容部12に
成形体15を収容し、蓋14を施して焼結する。The production of the sintered alloy of the present invention as described above is mainly made of iron powder, and the raw material powder in which the low melting point metal powder such as bronze powder and Pb is mixed is compacted and sintered in a Zn atmosphere. But
The aspect of this sintering is as shown in FIG.
Container 1 containing a vaporized Zn source 11 such as zinc oxide (ZnO)
The gas Zn generation source 1
The molded body accommodating portion 12 separated from 1 is set, the molded body 15 is accommodated in the accommodating portion 12, the lid 14 is applied, and sintering is performed.
即ち本発明者等はこのような焼結について種々の状況
を設定して焼結実験を繰返したが、成形体15が気化Zn発
生源11に接触した条件下においては仮りに接触部が僅少
であっても気化ZnがFeと優先的に反応し、前記したよう
な被覆層（Cu−Zn合金）３の形成が殆んど認められない
ようなこととなるのに対し、上記した第２図のような特
定の状態を形成することにより前記被覆層３を有効に得
しめることができる。That is, the present inventors set up various situations for such sintering and repeated the sintering experiment, but under the condition that the molded body 15 was in contact with the vaporized Zn generation source 11, the contact portion was temporarily small. Even if it exists, vaporized Zn reacts preferentially with Fe, and the formation of the coating layer (Cu-Zn alloy) 3 as described above is hardly recognized, while the above-mentioned FIG. By forming such a specific state as described above, the coating layer 3 can be effectively obtained.
本発明においては、Pb、Sb、Biがあり、これらの１種
以上を用いるが、最も好ましいものとしてはPbであり、
それによって前記被覆層３を有効に得しめる。このPbは
場合によっては鉛−青銅合金（Cu−Sn−Pb）としても同
様な効果を得ることができ、別に添加した方が好ましい
場合もある。酸化鉛を用いることもできるが効果におい
て若干劣ることになる。In the present invention, there are Pb, Sb and Bi, and one or more of them are used, but the most preferable one is Pb,
Thereby, the coating layer 3 can be effectively obtained. In some cases, this Pb can obtain the same effect as a lead-bronze alloy (Cu-Sn-Pb), and it may be preferable to add it separately. Lead oxide can be used, but the effect is slightly inferior.
Znは雰囲気ガスとして成形体に吸収させることが必要
であり、Cu−Zn合金（黄銅）やCu−Zn−Pb（鉛含有黄
銅）の如きとしてZnを成形体に含有させることは好まし
くない。Zn needs to be absorbed into the molded body as an atmosphere gas, and it is not preferable to incorporate Zn into the molded body such as Cu-Zn alloy (brass) or Cu-Zn-Pb (lead-containing brass).
具体的製品の１例として、65％Fe、33％青銅（Sn:10
％）、２％Pbの配合になる原料粉を圧粉成形し、第２図
に示したような収容部12上に該圧粉体をセットし、870
℃で焼結処理し得られた若干の製品についての特性ない
し組成は次の第１表に示す如くであって、全表面に厚さ
が12〜18μｍのCu−Zn層が略完全な連続被覆状態で形成
されたものである。As an example of a specific product, 65% Fe, 33% bronze (Sn: 10
%) 2% Pb of the raw material powder is compacted, and the compact is set on the container 12 as shown in FIG.
The characteristics and compositions of some of the products obtained by sintering at ℃ are as shown in Table 1 below, and the entire surface is covered with a Cu-Zn layer having a thickness of 12 to 18 μm, which is almost completely continuous. It is formed in the state.
又このものと、別に比較材として準備された前記特開
昭56−51554の方法に従い、Fe,Cu,Sn,Pb,Znを前記第１
表に準じた値としたものおよび従来技術で最高とされる
９％Sn青銅について、それらの摩擦係数を測定した効果
を要約して示しているのが第３図であって、本発明によ
るものが略同一の生物組成であっても、この摩擦係数に
おいて常に相当優れたものとなることは明かである。 In addition to this, Fe, Cu, Sn, Pb, and Zn were added to the first material according to the method of JP-A-56-51554 separately prepared as a comparative material.
It is FIG. 3 that summarizes the effect of measuring the friction coefficient of the values according to the table and 9% Sn bronze, which is the highest in the prior art, according to the present invention. It is clear that even if the biological composition is almost the same, the friction coefficient is always considerably excellent.
更にこの第１表および第３図に示したものとは別に本
発明者等はSn:5.5％の青銅を用い、次の第２表に示すよ
うな多様な配合の原料粉を用いて圧粉成形し、同様に第
２図のようにして得られるZn雰囲気で840℃により焼結
した。得られた製品の気孔率、圧環強度、硬度、耐食性
などの特性は併せて第２表に示す如くであって、合金層
最低厚みは７〜30μｍのものである。Further, apart from the ones shown in Table 1 and FIG. 3, the present inventors have used Sn: 5.5% bronze and pressed powders using various raw material powders as shown in Table 2 below. It was molded and similarly sintered at 840 ° C. in a Zn atmosphere obtained as shown in FIG. Properties such as porosity, radial crushing strength, hardness and corrosion resistance of the obtained product are as shown in Table 2, and the minimum alloy layer thickness is 7 to 30 μm.
又本発明者等はSn:19.5％の青銅粉を用い、次の第３
表に示すような配合の原料粉を用いて圧粉成形し、同様
に第２図のようにして得られるZn雰囲気で840℃により
焼結した。得られた製品の気孔率、圧環強度、硬度、耐
食性などの特性は併せて第３表に示す如くである。 Further, the present inventors have used Sn: 19.5% bronze powder, and
The raw material powders having the formulations shown in the table were compacted, and similarly sintered at 840 ° C. in the Zn atmosphere obtained as shown in FIG. Properties such as porosity, radial crushing strength, hardness and corrosion resistance of the obtained product are as shown in Table 3 together.
即ちこの場合においては合金層最低厚が〜におい
て70〜93μｍにも達しており、このものは軸材とのなじ
みや耐食性において著しく優れたものであった。 That is, in this case, the minimum thickness of the alloy layer reached 70 to 93 μm in the range of ~, and this was remarkably excellent in conformity with the shaft material and corrosion resistance.
上記したところは鉛粉末青銅粉とは別に用いた場合で
あるが、本発明者はこれらの別に鉛含有青銅粉（Sn:10
％、Pb:5％）を用いた原料粉を圧粉成形し、同様に第２
図のようにして得られるZn雰囲気で840℃により焼結し
た。得られた製品の気孔率、圧環強度、硬度、耐食性な
どの特性は併せて第４表に示す如くである。The above is the case where it is used separately from the lead powder bronze powder, but the present inventor separately prepared the lead-containing bronze powder (Sn: 10
%, Pb: 5%), the raw material powder is compacted, and the second
Sintering was performed at 840 ° C. in the Zn atmosphere obtained as shown in the figure. Properties such as porosity, radial crushing strength, hardness and corrosion resistance of the obtained product are as shown in Table 4 together.
即ちこの鉛含有青銅を用いた場合においても合金層厚
およびその他の特性において鉛粉と青銅粉を各別に準備
混合した場合と同様の結果が得られることを確認した。 That is, it was confirmed that even when this lead-containing bronze was used, the same results as in the case where the lead powder and the bronze powder were separately prepared and mixed were obtained in the alloy layer thickness and other characteristics.
なお本発明者等は上記のようなPbに代えてSb、Biを用
いることについても検討したが、特性においては前記し
たPbを用いた場合に準ずるものであった。即ち例えば65
％Fe−33％青銅−２％Biの配合によるものを840℃で焼
結処理したものはその全表面に略一様な11〜16μｍのCu
−Sn−Zn層が被覆形成され、その特性は次の第５表の如
くであって、前記した第１表に準じたものであることが
理解され、その他の場合も前記したところと同様であ
る。又Sbの場合もこの第５表と同様であった。The present inventors also examined using Sb and Bi instead of Pb as described above, but the characteristics were similar to the case of using Pb described above. Ie 65
% Fe-33% Bronze-2% Bi was sintered at 840 ℃, and the surface was almost uniform with 11-16μm Cu.
It is understood that the -Sn-Zn layer is formed by coating, and the characteristics are as shown in Table 5 below and are in accordance with Table 1 above, and in other cases, the same as described above. is there. Also in the case of Sb, it was the same as in Table 5.
「発明の効果」 以上説明したような本発明によるときは鉄粉を実質的
に主体とした焼結金属製品においてその表面にCu−Sn−
Zn−PbまたはCu−Sn−Zn−BiやCu−Sn−Zn−Sbのような
特殊の合金層被覆を均一に形成せしめ、軸受とした場合
における軸材とのなじみや摩擦係数が良好で、特異の美
観を備え、又耐食性に優れた各種製品を的確に提供せし
め、製造操作も配合された原料粉を圧粉成形し焼結する
という単なる焼結工程で足りるので比較的低コストであ
るなどの効果を共に有しており、工業的にその効果の大
きい発明である。 "Effects of the Invention" According to the present invention as described above, in a sintered metal product mainly composed of iron powder, Cu-Sn-
A special alloy layer coating such as Zn-Pb or Cu-Sn-Zn-Bi or Cu-Sn-Zn-Sb is formed uniformly, and the familiarity and friction coefficient with the shaft material when used as a bearing is good, It provides a variety of products with unique aesthetics and excellent corrosion resistance, and the manufacturing operation is relatively low cost because a simple sintering step of compacting and sintering the raw material powder mixed is sufficient. It is an invention that has both of the effects described above and has a large effect industrially.
【図面の簡単な説明】 図面は本発明の技術的内容を示すものであって、第１図
は本発明による製品の１例について軸材と共に顕微鏡的
組織を示した説明図、第２図は焼結処理状態についての
断面的説明図、第３図は本発明によるFe−33％青銅−２
％Pb−（Zn）材と従来の比較材としてのFe−Cu−Zn系圧
粉成形焼結体および従来最高とされる９％Sn青銅体につ
いてのPV値と摩擦係数の関係を求めた結果の図表であ
る。 然してこれらの図面中第１、２図において、１は軸受、
２は軸、３はCu−Sn−Znを主体とする合金、４は遊隙、
10は容器、11は気体Zn発生源、12は成形体収容部、13は
支持台、14は蓋、15は成形体であり、又第３図において
ソリッドの測定点は本発明材、オープンの測定点は比較
材の場合を示すものである。BRIEF DESCRIPTION OF THE DRAWINGS The drawings show the technical contents of the present invention. FIG. 1 is an explanatory view showing a microscopic structure together with a shaft for one example of a product according to the present invention, and FIG. FIG. 3 is a cross-sectional explanatory view of the state of sintering treatment, and FIG. 3 shows Fe-33% bronze-2 according to the present invention.
% Pb- (Zn) material, Fe-Cu-Zn compact powder compacted sintered body as a conventional comparative material, and the relation between the PV value and the friction coefficient for the highest conventional 9% Sn bronze body. Is a chart of. However, in FIGS. 1 and 2 in these drawings, 1 is a bearing,
2 is an axis, 3 is an alloy mainly composed of Cu-Sn-Zn, 4 is a play,
Reference numeral 10 is a container, 11 is a gas Zn generation source, 12 is a molded body accommodating portion, 13 is a support, 14 is a lid, and 15 is a molded body. The measurement points are for the comparative material.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ２２Ｃ 38/00 ３０４ 38/60 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location C22C 38/00 304 38/60
Claims (3)
wt％およびPbまたはSb、Biの何れか１種または２種以上
を0.5〜4wt％含有した圧粉成形焼結体であって、該焼結
体の表面が厚さ５〜100μｍのCu−Sn−Znを主体とする
合金層で被覆されたことを特徴とする焼結金属製品。1. Fe: 30-80 wt%, Cu: 15-65 wt%, Sn: 1-14
A powder compacted sintered body containing 0.5 to 4 wt% of wt% and any one or more of Pb or Sb and Bi, and the surface of the sintered body is Cu-Sn having a thickness of 5 to 100 μm. -Sintered metal product characterized by being coated with an alloy layer mainly composed of Zn.
と共にPb、Sb、Biの１種または２種以上を配合した原料
粉を圧粉成形し、該圧粉成形体を気化したZnが存在する
還元雰囲気中で焼結処理し、前記圧粉成形体の表面にCu
−Sn−Znを主体とした銅合金による被覆層を厚さ５〜10
0μｍ被覆せしめることを特徴とする焼結金属製品の製
造法。2. Raw material powder mainly composed of iron powder, containing bronze powder and at least one of Pb, Sb and Bi, and powder-compacting the powder compact to vaporize it. Sintering was performed in a reducing atmosphere containing Zn, and Cu was applied to the surface of the green compact.
-Sn-Zn copper alloy coating layer with a thickness of 5-10
A method for producing a sintered metal product, which comprises coating with 0 μm.
または２種以上を含有した青銅粉を混合した原料粉を準
備し、該原料粉を圧粉成形し得られた成形体を気化した
Znが存在する還元雰囲気中で焼結処理し、前記圧粉成形
体の表面にCu−Sn−Znを主体とした銅合金による被覆層
を厚さ５〜100μｍ被覆せしめることを特徴とする焼結
金属製品の製造法。3. A raw material powder comprising iron powder as a main component, and bronze powder containing one or more of Pb, Sb and Bi mixed therein, is prepared, and the raw material powder is compacted to obtain a powder. The molded body was vaporized
Sintering in a reducing atmosphere containing Zn to coat the surface of the green compact with a coating layer of a copper alloy mainly composed of Cu-Sn-Zn in a thickness of 5 to 100 μm. Manufacturing method of metal products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22470488A JPH086156B2 (en) | 1988-09-09 | 1988-09-09 | Sintered metal product and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22470488A JPH086156B2 (en) | 1988-09-09 | 1988-09-09 | Sintered metal product and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0273947A JPH0273947A (en) | 1990-03-13 |
| JPH086156B2 true JPH086156B2 (en) | 1996-01-24 |
Family
ID=16817938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22470488A Expired - Lifetime JPH086156B2 (en) | 1988-09-09 | 1988-09-09 | Sintered metal product and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH086156B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0795693B1 (en) * | 1996-03-14 | 2004-01-28 | Taiho Kogyo Co., Ltd. | Copper-alloy and sliding bearing having improved seizure resistance |
-
1988
- 1988-09-09 JP JP22470488A patent/JPH086156B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0273947A (en) | 1990-03-13 |
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