JPH0352531B2 - - Google Patents
Info
- Publication number
- JPH0352531B2 JPH0352531B2 JP22428883A JP22428883A JPH0352531B2 JP H0352531 B2 JPH0352531 B2 JP H0352531B2 JP 22428883 A JP22428883 A JP 22428883A JP 22428883 A JP22428883 A JP 22428883A JP H0352531 B2 JPH0352531 B2 JP H0352531B2
- Authority
- JP
- Japan
- Prior art keywords
- cast iron
- base material
- wear
- surface layer
- graphite
- 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
- 239000000463 material Substances 0.000 claims description 66
- 229910001018 Cast iron Inorganic materials 0.000 claims description 38
- 239000002344 surface layer Substances 0.000 claims description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 19
- 229910002804 graphite Inorganic materials 0.000 claims description 17
- 239000010439 graphite Substances 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000011863 silicon-based powder Substances 0.000 claims description 3
- 229910017082 Fe-Si Inorganic materials 0.000 claims description 2
- 229910017133 Fe—Si Inorganic materials 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 17
- 230000013011 mating Effects 0.000 description 16
- 239000011248 coating agent Substances 0.000 description 12
- 238000000576 coating method Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 239000010410 layer Substances 0.000 description 10
- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- 238000004381 surface treatment Methods 0.000 description 8
- 238000005087 graphitization Methods 0.000 description 7
- 230000014759 maintenance of location Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 238000007747 plating Methods 0.000 description 4
- 230000001737 promoting effect Effects 0.000 description 4
- 229910001567 cementite Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 3
- 238000001000 micrograph Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 229910005347 FeSi Inorganic materials 0.000 description 1
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000012791 sliding layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
- C23C26/02—Coating not provided for in groups C23C2/00 - C23C24/00 applying molten material to the substrate
Description
【発明の詳細な説明】
(イ) 技術分野
本発明は耐摩耗性、耐スカツフイング性等にす
ぐれた鋳鉄製摺動部材の製法に関するものであ
り、さらに詳しく述べるならば、本発明は表面処
理技術を用いて特殊な表面組織を有する鋳鉄製摺
動部材その製造方法に関するものである。[Detailed Description of the Invention] (a) Technical Field The present invention relates to a method for manufacturing a cast iron sliding member with excellent wear resistance, scuffing resistance, etc. More specifically, the present invention relates to a surface treatment technology. The present invention relates to a method of manufacturing a cast iron sliding member having a special surface texture using a method of manufacturing the same.
(ロ) 従来技術
従来、耐摩耗性及び耐スカツフイング性の向上
を目的とした鋳鉄製品の表面処理方法としては、
硬質Crメツキ、焼入及び溶射等が行なわれてい
る。又レーザービーム等の高密度エネルギー熱源
を用い基材表面を焼入又は再溶融チルし表面処理
する方法、あるいは基材表面に金属単体、合金又
は炭素等の単独粉末又は混合粉末を被覆し、そし
てレーザービーム等を用い基材と上記金属等とを
合金化せしめ高硬度の合金層を形成する表面処理
方法が知られている。しかしこれらの表面処理法
で処理された鋳鉄部材は耐摩耗性、耐スカツフイ
ング性が良好であるとともに相手材摩耗が少ない
ことの全てを満足するに至つていない。例えば硬
質Crメツキ層、再溶融チル層及び前記の合金層
は高硬度を有し耐摩耗性に優れるが、黒鉛組織を
呈せず保油性に乏しいため耐スカツフイング性に
劣り、また焼入層においては黒鉛の保油性、自己
潤滑性により耐スカツフイング性が優れているも
のの、硬度が低いため耐摩耗性が充分でない。さ
らに、溶射層においては非常な高硬度に加えポア
の存在により、保油性を有するため、耐スカツフ
イング性及び耐摩耗性は優れているが、相手材が
溶射層によつて損傷されることが多いために、溶
射処理鋳鉄部品を適用しうる相手材の種類が限ら
れている。以上述べた様に、現在、耐摩耗性スカ
ツフイング性鋳鉄製摺動部材として実用され又は
知られている鋳鉄部材の表面処理は摺動部材とし
ての耐摩耗性、耐スカツフイング性が良好である
とともに、相手材摩耗の少ないことの全ての要求
を満足させるに至つていない。(b) Prior Art Conventionally, methods for surface treatment of cast iron products aimed at improving wear resistance and scuffing resistance include:
Hard Cr plating, hardening, thermal spraying, etc. are performed. There is also a method of surface treatment by hardening or re-melting and chilling the surface of the base material using a high-density energy heat source such as a laser beam, or a method of coating the base material surface with a single powder or mixed powder of an elemental metal, an alloy, or carbon, and A surface treatment method is known in which a base material and the above-mentioned metal are alloyed using a laser beam or the like to form a highly hard alloy layer. However, cast iron members treated by these surface treatment methods have not yet achieved all of the following requirements: good wear resistance and scuffing resistance, and little wear on the mating material. For example, the hard Cr plating layer, the remelted chilled layer, and the above-mentioned alloy layer have high hardness and excellent wear resistance, but they do not exhibit a graphite structure and have poor oil retention, resulting in poor scuffing resistance. Although it has excellent scuffing resistance due to graphite's oil retention and self-lubricating properties, it does not have sufficient wear resistance due to its low hardness. Furthermore, the sprayed layer has oil retention properties due to its extremely high hardness and the presence of pores, so it has excellent scuffing resistance and wear resistance, but the mating material is often damaged by the sprayed layer. Therefore, the types of mating materials to which thermal sprayed cast iron parts can be applied are limited. As mentioned above, the surface treatment of cast iron members currently in practical use or known as wear-resistant and scuffing cast iron sliding members has good wear resistance and scuffing resistance as a sliding member, and It has not yet been possible to satisfy all the requirements for minimal wear on the mating material.
(ハ) 発明の目的
本発明は、苛酷な条件下にさらされる内燃機関
等の摺動部材としての特性、即ち耐摩耗性、耐ス
カツフイング性が良好であるとともに、相手材摩
耗の少ないことの全てを満足させた鋳鉄製摺動部
材を提供せんとするものである。特に、本発明は
耐摩耗性、及び耐スカツフイング性に優れた鋳鉄
部材の表面処理法において、高密度エネルギーを
持つ熱源としてレーザービーム、電子ビーム、プ
ラズマアーク等を用いて鋳鉄部材表面に優れた耐
摩耗性、耐スカツフイング性を有するとともに相
手材の摩耗が少ないことを満足する合金層を形成
した鋳鉄製摺動部材の製造方法を提供することを
目的とする。(c) Purpose of the Invention The present invention has all the characteristics of a sliding member of an internal combustion engine, etc. exposed to severe conditions, that is, good wear resistance and scuffing resistance, as well as low wear of mating materials. It is an object of the present invention to provide a cast iron sliding member that satisfies the following. In particular, the present invention is a method for surface treatment of cast iron members with excellent wear resistance and scuffing resistance, using a laser beam, electron beam, plasma arc, etc. as a heat source with high density energy. It is an object of the present invention to provide a method for manufacturing a cast iron sliding member having an alloy layer formed thereon, which has wear resistance and scuffing resistance, and which satisfies low wear of a mating material.
(ニ) 発明の構成
本発明者らは高硬度の鋳鉄チル組織のもつ優れ
た耐摩耗性と、黒鉛の保油性及び自己潤滑性によ
る耐スカツフイング性に着目し、黒鉛を分散させ
たチル組織を鋳鉄部材の表面に形成する各種方法
を試みた。(d) Structure of the Invention The present inventors focused on the excellent wear resistance of the high-hardness cast iron chilled structure and the scuffing resistance due to the oil retention and self-lubricating properties of graphite, and developed a chilled structure in which graphite is dispersed. We tried various methods of forming on the surface of cast iron parts.
本発明は、鋳鉄製摺動部材の鋳鉄基材の表面に
100メツシユ以下のSi，Sic又はFe−Siの各粉末の
１種又は２種以上を被覆し、該被覆表面層を高密
度エネルギーを持つ熱源のビームにより加熱溶融
することにより、該被覆表面層を前記鋳鉄基材に
合金化させ、且つ鋳鉄基材の表面部を黒鉛を分散
させたチル組織の変えることを特徴とする。 The present invention is directed to the surface of a cast iron base material of a cast iron sliding member.
The coating surface layer is coated with one or more of Si, Sic, or Fe-Si powders of 100 meshes or less, and the coating surface layer is heated and melted by a beam of a heat source with high density energy. It is characterized in that it is alloyed with the cast iron base material, and the surface portion of the cast iron base material has a chill structure in which graphite is dispersed.
本発明により形成させる鋳鉄基材上の表面層の
組織は、高硬度のチル組織中に黒鉛を分散させた
ものであり、そして、高硬度のチル組織による耐
摩耗性と黒鉛による保油性、態スカツフイング性
を併せもつ優れた摺動層となる。従来、過共晶組
成の鋳鉄を急冷すると稀れに過冷却によつてセメ
ンタイトと黒鉛が同時に析出する現象が知られて
いる。しかしながら、表面層が基材より多量の黒
鉛化促進元素又は合金を含有するチル組織におい
て、高密度エネルギービームにより元の母材の黒
鉛が消失し、新たな黒鉛が析出し分散したものは
従来知られていない。 The structure of the surface layer on the cast iron base material formed according to the present invention has graphite dispersed in a highly hard chilled structure, and has wear resistance due to the highly hard chilled structure, oil retention properties due to graphite, It becomes an excellent sliding layer that also has scuffing properties. Conventionally, it has been known that when cast iron with a hypereutectic composition is rapidly cooled, cementite and graphite are precipitated simultaneously due to supercooling. However, in a chilled structure in which the surface layer contains a larger amount of graphitization-promoting elements or alloys than the base material, the graphite in the original base material disappears due to the high-density energy beam, and new graphite precipitates and disperses. It has not been done.
鋳鉄の必須成分であるSiは黒鉛化促進元素であ
り、そして通常1.5〜3.5％が鋳鉄中に含有されて
いることは良く知られている。本発明においては
表面層の黒鉛化促進元素の含有量は、２種類以上
の場合は合計量で、４〜６％である。なお、黒鉛
化促進元素として、例えばSiを使用した場合は基
材中のSiと、後述する被覆層中のSiとの合計量が
表面層のSi含有量となることは当然である。 It is well known that Si, which is an essential component of cast iron, is an element that promotes graphitization and is usually contained in cast iron in an amount of 1.5 to 3.5%. In the present invention, the content of graphitization promoting elements in the surface layer is 4 to 6% in total when there are two or more types. In addition, when Si is used as the graphitization promoting element, for example, it is natural that the total amount of Si in the base material and Si in the coating layer described later becomes the Si content of the surface layer.
本発明の鋳鉄製摺動部材においては、基材と表
面層（黒鉛を分散したチル層）の間に極く薄いマ
ルテンサイト層が認められることがある。また表
面層のマトリツクスは、その合金元素量及びチル
の程度によつて、レーデブライト、初晶オーステ
ナイト、マルテンサイト及びセメンタイトの１種
以上が認められる。基材とする鋳鉄は片状又は球
状黒鉛鋳鉄等、チル可能な材質であればよい。 In the cast iron sliding member of the present invention, an extremely thin martensite layer may be observed between the base material and the surface layer (chill layer in which graphite is dispersed). The matrix of the surface layer may contain one or more of ledebrite, primary austenite, martensite, and cementite, depending on the amount of alloying elements and the degree of chill. The cast iron used as the base material may be any material that can be chilled, such as flake or spheroidal graphite cast iron.
以下に本発明の具体例を説明する。先ず表面を
研摩した鋳鉄基材表面に所望の表面層を形成する
ための被覆材料を粉末状又はペースト状の形態で
被覆する。被覆材としては黒鉛化促進元素である
Si、その合金であるSiC，FeSi、等が使用され
る。被覆材の粒度及び被覆表面層の厚さは加熱源
の熱容量と形成すべき表面層の厚さにより決めら
れる。被覆材の粒度は微細なほど合金化で良好が
あり、一方粒度が100メツシユを越える粗粒の場
合には鋳鉄基材と黒鉛化促進元素との合金化が困
難となるため100メツシユ以下の細粒が望ましい。
被覆層の厚さは一般に0.1mmないし２mmが適当で
ある。表面層を形成するための熱源としては、母
材（鋳鉄基材）全体を加熱せず被覆表面層のみを
急速に加熱し、その溶融合金化を図り、基材への
急速冷却が図れる様な高密度エネルギーを有する
レーザービーム、電子ビーム及びプラズマアーク
が適当である。これら熱源による照射は、表面層
へのブローホールの巻き込みを防止するため不活
性ガス雰囲気中又は真空中で行なうことが好まし
く、例えば窒素ガス、アルゴンガスが使用され
る。本発明の方法においては高密度エネルギーを
持つ熱源による極めて急速な基材表面加熱と溶融
がなされるため、鋳鉄基材表面が黒鉛化促進元素
により過共晶組成となりまた母材の黒鉛が消失
し、更に鋳鉄基材の質量効果に基く自己冷却によ
る急冷却の結果チル組織中に黒鉛が新たに微細に
析出するに至つたものと考えられる。 Specific examples of the present invention will be explained below. First, a coating material in powder or paste form for forming a desired surface layer is coated on the surface of a polished cast iron base material. As a coating material, it is an element that promotes graphitization.
Si, its alloys SiC, FeSi, etc. are used. The particle size of the coating material and the thickness of the coating surface layer are determined by the heat capacity of the heating source and the thickness of the surface layer to be formed. The finer the particle size of the coating material, the better the alloying will be.On the other hand, if the particle size is coarser than 100 mesh, it will be difficult to alloy the cast iron base material with the graphitization promoting element. Grain grains are preferable.
The thickness of the coating layer is generally 0.1 mm to 2 mm. The heat source for forming the surface layer is one that rapidly heats only the coating surface layer without heating the entire base material (cast iron base material), melts it into an alloy, and rapidly cools the base material. Laser beams, electron beams and plasma arcs with high density energy are suitable. The irradiation by these heat sources is preferably carried out in an inert gas atmosphere or in a vacuum to prevent blowholes from being drawn into the surface layer; for example, nitrogen gas or argon gas is used. In the method of the present invention, the surface of the base material is extremely rapidly heated and melted by a heat source with high density energy, so that the surface of the cast iron base material becomes hypereutectic due to graphitization promoting elements, and the graphite in the base material disappears. Furthermore, it is thought that graphite was newly precipitated finely in the chill structure as a result of rapid cooling due to self-cooling based on the mass effect of the cast iron base material.
(ホ) 実施例 以下に実施例を掲げて説明する。(e) Examples Examples will be described below.
実施例 １
表面を＃
240エメリー紙で研摩したFC25相当鋳
鉄を基材とした。基材の組成は重量比でTC3.15
％，Si2.02％，Mn0.76％，Cr0.36％，S0.043％，
P0.34％であり、また基材の硬さはHRB97であつ
た。また被覆材として250メツシユ以下の金属シ
リコン粉末を厚さ0.5mmで鋳鉄基材に被覆して被
覆表面層とした。熱源としてCO2レーザーを用い
てN2ガス雰囲気中でレーザー出力1.2kWビーム
径３mmφ及び走査速度60mm／minの条件でレーザ
ー照射処理を施して被覆表面層を加熱溶融した。
第１図に示す金属顕微鏡写真（100倍）から分か
るように被処理材料の表面層の厚さは0.2mmであ
つて、表面層は微細な黒鉛を分散したチル層であ
る。この表面層は硬さHv1100であつた。また表
面層を化学分析したところSi含有量は重量比で
4.5％であつた。Example 1 The base material was cast iron equivalent to FC25 whose surface was polished with #240 emery paper. Base material composition is TC3.15 by weight
%, Si2.02%, Mn0.76%, Cr0.36%, S0.043%,
P0.34%, and the hardness of the base material was HRB97. In addition, as a coating material, metal silicon powder of 250 mesh or less was coated on a cast iron base material to a thickness of 0.5 mm to form a coating surface layer. Using a CO 2 laser as a heat source, the coating surface layer was heated and melted by laser irradiation treatment under the conditions of a laser output of 1.2 kW, a beam diameter of 3 mmφ, and a scanning speed of 60 mm/min in an N 2 gas atmosphere.
As can be seen from the metal micrograph (100x magnification) shown in Figure 1, the thickness of the surface layer of the material to be treated is 0.2 mm, and the surface layer is a chill layer in which fine graphite is dispersed. This surface layer had a hardness of Hv1100. In addition, chemical analysis of the surface layer revealed that the Si content was expressed as a weight ratio.
It was 4.5%.
比較のために前記と同一の鋳鉄基材に黒鉛化促
進元素である金属シリコンを塗布せず、そのまま
上述のところと同一条件でレーザー照射した表面
層のチル組織は第２図の金属顕微鏡写真（100倍）
に示す如く、黒鉛の析出しないセメンタイトのみ
の組織であり、母材の芯部に見られるような黒鉛
は表面層では消失している。 For comparison, the same cast iron base material as above was irradiated with laser under the same conditions as above without applying metallic silicon, which is an element that promotes graphitization. Hundredfold)
As shown in the figure, the structure consists only of cementite without precipitation of graphite, and the graphite found in the core of the base material has disappeared in the surface layer.
実施例 ２
実施例１の本発明による被処理材と比較例のチ
ル材の他に、比較例として、表面処理を施こさな
い実施例１の基材、及び実施例１の基材にフエロ
クロムを溶射、Crメツキ、及び高周波焼入のそ
れぞれの処理を施した比較例を用い、第３図に示
す如き往復動摩耗試験機を用いた摩耗試験による
摩耗テスト第４図に示す如き西原式金属摩耗試験
機によるスカツフ試験を行なつた。以下に摩耗及
びスカツフテストの条件を示す。Example 2 In addition to the treated material according to the present invention of Example 1 and the chilled material of Comparative Example, as a comparative example, the base material of Example 1 without surface treatment and the base material of Example 1 coated with ferrochrome were used. A wear test using a comparative example of thermal spraying, Cr plating, and induction hardening using a reciprocating abrasion tester as shown in Fig. 3 Nishihara type metal wear test as shown in Fig. 4 A skatuf test was conducted using a testing machine. The conditions for the wear and scuff tests are shown below.
第３図において、ａは相手材、ｂは供試材、ｃ
は荷重装置、ｄは往復駆動装置である。また第４
図において、ｅは供試材、ｆは相手材である。ｐ
は荷重を示す。試験条件を次に示す。 In Fig. 3, a is the mating material, b is the specimen material, and c
is a loading device, and d is a reciprocating drive device. Also the fourth
In the figure, e is the sample material and f is the mating material. p
indicates load. The test conditions are shown below.
摩耗試験条件
荷重：10Kgｆ
潤滑：SAE＃
10エンジンオイル（0.2c.c.／min）
速度：600cpm（cycle／min）
距離：3000ｍ
相手材(a)：硬質Crメツキ鋳鉄及びFCチル材
摩耗試験において、供試材(b)の摩耗量はあらさ
計によりその凹量で求めた。相手材(a)の摩耗量は
摩耗痕径で求めた。Wear test conditions Load: 10Kgf Lubrication: SAE # 10 engine oil (0.2cc/min) Speed: 600cpm (cycle/min) Distance: 3000m Mating material (a): Hard Cr-plated cast iron and FC chilled material The wear amount of material (b) was determined by the amount of concavity using a roughness meter. The amount of wear on the mating material (a) was determined from the wear scar diameter.
スカツフ試験条件
速度：2.5ｍ／sec
潤滑：SAE＃
10エンジンオイル20c.c.／min
相手材(f)：硬質Crメツキ及びFCチルロータ
荷重(p)：100ｍごとに5.0Kgｆ荷重を増加させ、ス
カツフが起こつた時の荷重（スカツフ限界荷
重）を求めた。Skatufu test conditions Speed: 2.5m/sec Lubrication: SAE # 10 engine oil 20c.c./min Mating material (f): Hard Cr plating and FC chill rotor Load (p): Increase the load by 5.0Kgf every 100m, The load at which this occurs (Skatuf limit load) was determined.
第５図に摩耗試験の結果を示す。この図面にお
いて斜線で示した棒グラフは相手材の摩耗量、斜
線なしの白地の棒グラフは供試材の摩耗量を示
す。 Figure 5 shows the results of the wear test. In this drawing, a bar graph with diagonal lines indicates the amount of wear on the mating material, and a bar graph with a white background without diagonal lines indicates the amount of wear on the test material.
第５図より、本発明の供試材は、FCチル及び
Crメツキ鋳鉄の何れの相手材についても、耐摩
耗性が優れ且つ相手材を摩耗させる量も少ない。 From FIG. 5, the test materials of the present invention are FC chill and
Both of the mating materials of Cr-plated cast iron have excellent wear resistance, and the amount of wear on the mating materials is small.
第６図にスカツフ試験結果を示す。この図面よ
り、本発明の供試材は耐スカツフ性が極めて高い
ことが分かる。 Figure 6 shows the Skatuf test results. From this drawing, it can be seen that the test material of the present invention has extremely high scuff resistance.
(ヘ) 効果
本発明によれば、鋳鉄部品の摺動表面に黒鉛を
微細分散させた高硬度チル組織を有する表面層が
形成され、耐摩耗性、耐スカツフイング性及び相
手材を摩耗させる性質が少ないなど、苛酷な条件
下で用いられるのに適した摺動部材が提供され
る。その適用分野としては、内燃機関のピストン
リング、シリンダー、シリンダーライナー、カム
シヤフト、ロツカーアーム、タペツト等、あるい
は回転式流体ポンプ、回転式流体圧縮機のベーン
等に対して広く適用しうるものである。(f) Effects According to the present invention, a surface layer having a high hardness chilled structure in which graphite is finely dispersed is formed on the sliding surface of a cast iron component, which improves wear resistance, scuffing resistance, and the property of abrading the mating material. There is provided a sliding member suitable for use under harsh conditions. It can be widely applied to piston rings, cylinders, cylinder liners, camshafts, rocker arms, tappets, etc. of internal combustion engines, rotary fluid pumps, vanes of rotary fluid compressors, etc.
第１図は本発明の方法により得られた摺動部材
の金属顕微鏡写真（倍率100倍）、第２図はレーザ
ーによるチル組織を示す金属顕微鏡写真（倍率
100倍）、第３図は往復動摩耗試験機の概略図、第
４図は西原式摩耗試験機の概略図、第５図は摩耗
テスト結果を示すグラフ、第６図はスカツフイン
グテスト結果を示すグラフである。
ａ……相手材、ｂ……供試材、ｃ……荷重装
置、ｄ……往復駆動装置、ｅ……供試材、ｆ……
相手材。
Figure 1 is a metallurgical micrograph (magnification: 100x) of a sliding member obtained by the method of the present invention, and Figure 2 is a metallurgical micrograph (magnification:
100 times), Figure 3 is a schematic diagram of the reciprocating wear tester, Figure 4 is a schematic diagram of the Nishihara type wear tester, Figure 5 is a graph showing the wear test results, and Figure 6 is the scuffing test results. This is a graph showing. a...Mating material, b...Test material, c...Loading device, d...Reciprocating drive device, e...Test material, f...
Opponent material.
Claims (1)
ユ以下のSi，Sic又はFe−Siの各粉末の１種又は
２種以上を被覆し、該被覆表面層を高密度エネル
ギーを持つ熱源のビームにより加熱溶融すること
により、該被覆表面層を前記鋳鉄基材に合金化さ
せ、且す鋳鉄基材の表面部を黒鉛を分散させたチ
ル組織に変えることを特徴とする鋳鉄製摺動部材
の製造方法。1. The surface of the cast iron base material of a cast iron sliding member is coated with one or more of Si, Sic, or Fe-Si powders of 100 mesh or less, and the coated surface layer is exposed to a heat source with high density energy. A cast iron sliding member characterized in that the coated surface layer is alloyed with the cast iron base material by heating and melting with a beam, and the surface portion of the cast iron base material is changed into a chilled structure in which graphite is dispersed. manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22428883A JPS60116761A (en) | 1983-11-30 | 1983-11-30 | Sliding member made of cast iron and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22428883A JPS60116761A (en) | 1983-11-30 | 1983-11-30 | Sliding member made of cast iron and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60116761A JPS60116761A (en) | 1985-06-24 |
| JPH0352531B2 true JPH0352531B2 (en) | 1991-08-12 |
Family
ID=16811421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22428883A Granted JPS60116761A (en) | 1983-11-30 | 1983-11-30 | Sliding member made of cast iron and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60116761A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01242786A (en) * | 1988-03-23 | 1989-09-27 | Mitsubishi Heavy Ind Ltd | Sliding member and production thereof |
| DE3813802A1 (en) * | 1988-04-23 | 1989-11-09 | Glyco Metall Werke | LAYERING MATERIAL OR LAYERING MATERIAL WITH A FUNCTIONAL LAYER APPLIED ON A SUPPORT LAYER, IN PARTICULAR SLIDING LAYER WITH THE STRUCTURE OF A SOLID, BUT MELTABLE DISPERSION |
| JP4420015B2 (en) | 2006-12-27 | 2010-02-24 | トヨタ自動車株式会社 | Iron-based composite material and method for producing iron-based composite material |
| CN103361597B (en) * | 2012-04-06 | 2016-08-03 | 武安市文祥合金制造有限公司 | A kind of high-phosphorous iron top layer method for carburizing |
-
1983
- 1983-11-30 JP JP22428883A patent/JPS60116761A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60116761A (en) | 1985-06-24 |
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