JPS6155578B2 - - Google Patents
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- Publication number
- JPS6155578B2 JPS6155578B2 JP56079707A JP7970781A JPS6155578B2 JP S6155578 B2 JPS6155578 B2 JP S6155578B2 JP 56079707 A JP56079707 A JP 56079707A JP 7970781 A JP7970781 A JP 7970781A JP S6155578 B2 JPS6155578 B2 JP S6155578B2
- Authority
- JP
- Japan
- Prior art keywords
- cast iron
- wear
- steadite
- wear resistance
- content
- 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
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- 229910001018 Cast iron Inorganic materials 0.000 claims description 42
- 229910045601 alloy Inorganic materials 0.000 claims description 26
- 239000000956 alloy Substances 0.000 claims description 26
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 229910052791 calcium Inorganic materials 0.000 claims description 7
- 229910014458 Ca-Si Inorganic materials 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 2
- 239000011575 calcium Substances 0.000 description 17
- 230000005496 eutectics Effects 0.000 description 14
- 230000000694 effects Effects 0.000 description 9
- 238000001000 micrograph Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 229910000882 Ca alloy Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000011081 inoculation Methods 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Description
本発明は、中・小形内燃機関のシリンダライナ
ーとして最適な耐摩耗合金鋳鉄の製造方法に関す
るものである。
一般に、含Ｐ鋳鉄の耐摩耗性の良いことはよく
知られている。これは、鋳鉄の最終凝固部に偏析
するステダイトの効果によるものであつて、特
に、P0.2〜0.8％の範囲内において、この効果は
著しい。しかしながら、この範囲内においても、
P0.2〜0.3％の比較的含有量の低い範囲において
は、ステダイトの晶出量が少なく、また、必ずし
も均一に分布していないため、Ｐ含有量0.5〜0.8
％の鋳鉄に比較して耐摩耗性が劣る欠点を有して
いた。したがつて、耐摩耗性は、Ｐ含有量0.5％
以上の方が良好となるが、ただ、このように0.5
〜0.8％の範囲内においては、強度が低下し、そ
のため、従来においては、耐摩耗性の劣つた0.2
〜0.3％の範囲内で使用されていた。
本発明は上記のような現状に鑑みてなされたも
のであり、本発明の目的は、Ｐ含有量0.5〜0.8％
の高Ｐ鋳鉄よりも耐摩耗性の劣つていた0.2〜0.3
％Ｐ鋳鉄において、共晶セル数を増加し、ステダ
イトの分布を細かく均一とすることによつて耐摩
耗性を向上させる点にあり、また、本発明の第２
の目的は、従来強度の劣つていた0.5〜0.8P鋳鉄
の耐摩耗性をより向上させるとともに、強度を向
上させた耐摩耗合金鋳鉄を提供することにある。
なお、本発明の発明者らは、先にCu―Caを添加
することによつて耐蝕、耐熱性を改善した合金鋳
鉄を発明し、特公昭55―42140号として公告され
たが、これはP0.1％以下と低く、そのため耐摩耗
性の改善が充分でなく、シリンダライナー等の摺
動部材には不充分なものであり、これに対して本
発明は、Ｐ含有量0.2〜0.8％と、広い範囲に亘る
Ｐ含有鋳鉄において耐摩耗性を大幅に改善すると
同時にその強度を向上したものであつて、摺動部
材として最適である点に特長がある。
このような目的を達成するため、本発明では、
Ｃ、Si、Mn、Ｐ、Ｓ及び不可避不純物を含有
し、残部Feである鋳鉄溶湯に、Cu及びCa又はCu
及びCa―Siを、各添加剤の単独又は合金の何れ
かの状態で添加し、最終的に、C2.8〜3.8％、
Si1.5〜2.5％、Mn0.4〜1.2％、P0.2〜0.8％、
S0.12％以下、及び、Cu0.3〜1.5％、Ca0.01％以
下を含有させることを特徴とする耐摩耗合金鋳鉄
の製造方法を第１の発明とし、Ｃ、Si、Mn、
Ｐ、Ｓ及び不可避不純物を含有し、残部Feであ
る鋳鉄溶湯に、Cu及びCa又はCu及びCa―Siを、
各添加剤の単独又は合金の何れかの状態で添加
し、最終的に、C2.8〜3.8％、Si1.5〜2.5％、
Mn0.4〜1.2％、P0.2〜0.8％、S0.12％以下、及
び、Cu0.3〜1.5％、Ca0.01％以下を含有させ、か
つ、Cr0.8％以下、Mo0.8％以下、V0.5％以下の
１種又は２種以上を含有させることを特徴とする
耐摩耗合金鋳鉄の製造方法を第２の発明とする。
本発明の耐摩耗合金鋳鉄は、従来のものに比較
して共晶セル数が２倍程度に増加し、したがつ
て、ステダイトが均一に分布し、従来のものに比
較して耐摩耗性が良好であり、しかも、従来、強
度上の問題を有していたＰ含有量0.5〜0.8％鋳鉄
の強度が増大し、そのため、耐摩耗性の要求され
るシリンダライナー等に最適である。
本発明によれば、前記成分割合の鋳鉄中にCa
が添加されるが、このCaは、酸化カルシウム及
び硫化カルシウムとなつて溶湯中に懸濁して核作
用をなし、凝固に際して共晶セル数を増加させる
ものであり、これによつてステダイトの分布が細
かく均一となり、耐摩耗性が向上し、かつ、強度
を20〜30％向上させるが、0.01％を越えて残留す
るようにしてもそれ以上の効果は期待できない。
また、Cuは、遊離Fe3Cの析出を押え、肉薄部
のチル発生と肉厚部の遊離フエライトの発生を防
止し、パーライトを緻密・硬化させ、更に、耐摩
耗性を向上させる。ただ、0.3％未満では効果を
期待できず、逆に1.5％を越えると耐摩耗性が低
下する。
一般に、Ｐはステダイトを形成し、鋳鉄を脆化
させる成分であり、そのため普通鋳鉄において
は、0.1％以下とするものが普通であるが、耐摩
耗鋳鉄としては、ステダイトの晶出が有効であ
り、したがつて、このステダイトの晶出するＰ含
有量を設定することが必要となる。このようなＰ
含有によるステダイトの晶出は、Ｃ、Si、特殊元
素の含有量及び冷却速度等によつて、その晶出の
有無及び量が変化するが、一般に、Ｐが僅かであ
ればフエライト中に固溶するため、ステダイトの
晶出を期待することができず、結局、前記Ｃ、Si
の成分範囲内においては、Ｐ含有量0.2％以上で
あれば、耐摩耗性に有効な量のステダイトが晶出
する。また、Ｐ含有量が多くなれば、ステダイト
の晶出量が多くなり耐摩耗性は向上するが、逆に
0.8％以上になると共晶セル数が減少し、耐摩耗
性は悪くなる。第１図は、Ｐ含有量とシリンダラ
イナー摩耗量との関係を調べたグラフであり、こ
のように、耐摩耗性は0.75％程度が最も良く、
0.8％を越えると悪くなることが推定される。し
たがつて、本発明では、Ｐ含有量を0.2〜0.8％の
範囲内とする。
次に、本発明の第２の発明において、上記Cu
―Caを含有する鋳鉄中にCr0.8％以下、Mo0.8％
以下、V0.5％以下の１種又は２種以上が添加さ
せるが、これらは、Cuと併用添加すことによつ
て基地のパーライトを安定させて引張強さを向上
させ、かつ、耐熱性、耐摩耗性を向上させるもの
である。これらのうちCrは、炭化物を形成し、
強度を増加して耐熱衝撃性、靭性を大きく向上さ
せるもので、その効果はCuとの相乗作用による
場合に顕著であるが、特に、本発明の如くステダ
イトを晶出する鋳鉄においては、Ｐと複合炭化物
を作りステダイトの硬度を増大させ、耐摩耗性を
向上させる。ただ、このCrは0.8％を越えてもそ
れ以上の効果は期待できない。MoもCrと略同様
であり、その成分範囲は0.8％以下とするのがよ
い。
また、ＶはCrと同じく溶湯中へ添加すること
によつて、Ｐと複合炭化物を作り、ステダイトの
硬度を増し耐摩耗性を向上させるものである。た
だ、このＶは鋳鉄の黒鉛化阻害作用も強いため、
ライナー等摺動部材の特性を考慮し、本発明では
0.5％に規制する。
本発明耐摩耗合金鋳鉄の製造法を説明すると、
まずCa含有量５〜20％のCu―Ca合金、又は、Ca
含有量５〜20％、Si含有量５〜15％のCu―Ca―
Si合金を溶製し、適当な大きさに破砕したもの
を、又は、これとCr、Mo、Ｖの１種又は２種以
上と併用したものを、鋳鉄溶湯に炉前にて添加す
ることによつて得られる。なお、Cu―Ca合金、
Cu―Ca―Si合金の代りにCu及びCa又はCu及び
Ca―Siを各々単独に添加してもよい。添加時の
溶湯温度は1450〜1500℃とし、鋳造はCaの効果
を考慮して、合金添加後５分以上15分以内とす
る。
次に、本発明の実施例を説明すると、上記本発
明の第１の発明に基づいて製造した耐摩耗合金鋳
鉄を従来の鋳鉄と比較した結果を表１に示す。な
お、摩耗量は葉山式摩耗試験機により、接触荷重
10Kg／cm2、摩擦速度3m／sec、無潤滑状態で
60km走行した場合の20kmから60km間の１Km当
りの摩耗量を測定したものである。
表１においてNo.１〜６がCuのみを添加した場
合、No.７〜9′がCu及びCaを添加した場合を示し
ており、特に、従来、耐摩耗性が劣るとされてい
た0.2〜0.3％Ｐ鋳鉄（No.２、５及びNo.８、8′参
照）では、Cuを単独添化したものより、本発明
の方が共晶セル数が略２倍に増大し、引張強度及
び硬度が増大し、耐摩耗性は、従来例で最も秀れ
ていた0.8％Ｐ鋳鉄よりも秀れていることが解
る。また、従来強度が劣るとされていたＰ含有量
0.817％の本発明耐摩耗合金鋳鉄は（No.９、9′参
照）、従来の0.2〜0.3％Ｐ鋳鉄よりも大幅に秀
れ、また、硬度、共晶セル数ともに増大している
ことが解る。
The present invention relates to a method for manufacturing a wear-resistant cast iron alloy suitable for cylinder liners of small and medium-sized internal combustion engines. Generally, it is well known that P-containing cast iron has good wear resistance. This is due to the effect of steadite that segregates in the final solidification part of cast iron, and this effect is particularly significant within the range of P0.2 to 0.8%. However, even within this range,
In the relatively low P content range of 0.2 to 0.3%, the amount of steadite crystallized is small and is not necessarily uniformly distributed, so the P content is 0.5 to 0.8%.
% cast iron had the disadvantage of inferior wear resistance. Therefore, the wear resistance is 0.5% P content.
The above is better, but 0.5 like this
In the range of 0.8% to 0.8%, the strength decreases, so conventionally 0.2% has poor wear resistance.
It was used within the range of ~0.3%. The present invention was made in view of the above-mentioned current situation, and an object of the present invention is to reduce the P content from 0.5 to 0.8%.
The wear resistance was inferior to that of high P cast iron of 0.2 to 0.3
%P cast iron, the wear resistance is improved by increasing the number of eutectic cells and making the distribution of steadite fine and uniform.
The purpose of this invention is to further improve the wear resistance of 0.5-0.8P cast iron, which has conventionally had poor strength, and to provide a wear-resistant alloy cast iron with improved strength.
The inventors of the present invention previously invented an alloy cast iron with improved corrosion resistance and heat resistance by adding Cu-Ca, which was published as Japanese Patent Publication No. 55-42140, but this was P0 As a result, the wear resistance is not sufficiently improved and is insufficient for sliding members such as cylinder liners.In contrast, the present invention has a P content of 0.2 to 0.8%. , which has significantly improved wear resistance and strength in a wide range of P-containing cast irons, and is characterized by being optimal as a sliding member. In order to achieve such an objective, the present invention:
Cu and Ca or Cu are added to molten cast iron containing C, Si, Mn, P, S and unavoidable impurities, with the balance being Fe.
and Ca-Si are added as each additive alone or as an alloy, and finally, C2.8 to 3.8%,
Si1.5~2.5%, Mn0.4~1.2%, P0.2~0.8%,
The first invention is a method for producing a wear-resistant alloy cast iron characterized by containing S0.12% or less, Cu0.3 to 1.5%, Ca0.01% or less, C, Si, Mn,
Cu and Ca or Cu and Ca-Si are added to molten cast iron containing P, S and unavoidable impurities, with the remainder being Fe.
Each additive is added either alone or as an alloy, and the final result is C2.8~3.8%, Si1.5~2.5%,
Contains Mn0.4-1.2%, P0.2-0.8%, S0.12% or less, Cu0.3-1.5%, Ca0.01% or less, and Cr0.8% or less, Mo0.8% Hereinafter, a method for producing a wear-resistant alloy cast iron characterized by containing one or more V0.5% or less will be referred to as a second invention. The wear-resistant alloy cast iron of the present invention has approximately twice the number of eutectic cells compared to conventional ones, and therefore has uniform distribution of steadite, and has higher wear resistance than conventional ones. Moreover, the strength of cast iron with a P content of 0.5 to 0.8%, which conventionally had problems in terms of strength, is increased, so it is ideal for cylinder liners and the like that require wear resistance. According to the present invention, Ca in cast iron having the above-mentioned component ratio is
This Ca becomes calcium oxide and calcium sulfide and is suspended in the molten metal and acts as a nucleator, increasing the number of eutectic cells during solidification, thereby changing the distribution of steadite. It becomes fine and uniform, improves wear resistance, and improves strength by 20 to 30%, but even if it remains in excess of 0.01%, no further effects can be expected. Further, Cu suppresses the precipitation of free Fe 3 C, prevents the occurrence of chill in thin wall portions and free ferrite in thick wall portions, densifies and hardens pearlite, and further improves wear resistance. However, if it is less than 0.3%, no effect can be expected, and if it exceeds 1.5%, wear resistance will decrease. In general, P is a component that forms steadite and makes cast iron brittle. Therefore, in ordinary cast iron, the content is usually 0.1% or less, but as a wear-resistant cast iron, crystallization of steadite is effective. , Therefore, it is necessary to set the P content that crystallizes in this steadite. P like this
The presence or absence of crystallization and amount of crystallization of steadite due to inclusion will vary depending on the content of C, Si, special elements, cooling rate, etc., but in general, if P is small, solid solution in ferrite will occur. Therefore, crystallization of steadite cannot be expected, and in the end, the C, Si
Within the range of components, if the P content is 0.2% or more, an amount of steadite that is effective for improving wear resistance will crystallize. In addition, if the P content increases, the amount of steadite crystallized increases and the wear resistance improves, but on the other hand,
When it exceeds 0.8%, the number of eutectic cells decreases and wear resistance deteriorates. Figure 1 is a graph examining the relationship between P content and cylinder liner wear amount.
It is estimated that if it exceeds 0.8%, it will become worse. Therefore, in the present invention, the P content is set within the range of 0.2 to 0.8%. Next, in the second aspect of the present invention, the Cu
- Cr0.8% or less, Mo0.8% in cast iron containing Ca
Below, one or more types of V0.5% or less are added, but these are added in combination with Cu to stabilize the base pearlite and improve tensile strength, as well as heat resistance and This improves wear resistance. Among these, Cr forms carbide,
It increases strength, greatly improves thermal shock resistance and toughness, and this effect is remarkable when it works synergistically with Cu, but in particular, in cast iron that crystallizes steadite as in the present invention, P and Creates a composite carbide to increase the hardness of Steadite and improve its wear resistance. However, even if this Cr exceeds 0.8%, no further effect can be expected. Mo is also almost the same as Cr, and its component range is preferably 0.8% or less. Further, when V is added to the molten metal like Cr, it forms a composite carbide with P, increasing the hardness of steadite and improving its wear resistance. However, since this V also has a strong inhibitory effect on graphitization of cast iron,
Considering the characteristics of sliding members such as liners, the present invention
Regulated at 0.5%. To explain the manufacturing method of the wear-resistant alloy cast iron of the present invention,
First, Cu-Ca alloy with Ca content of 5 to 20% or Ca
Cu-Ca- with content 5-20%, Si content 5-15%
By melting Si alloy and crushing it into appropriate sizes, or by combining it with one or more of Cr, Mo, and V, it is added to molten cast iron before the furnace. You can get it by twisting it. In addition, Cu-Ca alloy,
Cu and Ca or Cu and Cu instead of Cu-Ca-Si alloy
Ca—Si may be added individually. The temperature of the molten metal at the time of addition is 1450 to 1500°C, and the casting time is 5 minutes or more and 15 minutes or less after adding the alloy, taking into consideration the effect of Ca. Next, to explain an example of the present invention, Table 1 shows the results of comparing the wear-resistant alloy cast iron manufactured based on the first aspect of the present invention with conventional cast iron. In addition, the amount of wear was measured using a Hayama type abrasion tester based on the contact load.
10Kg/cm 2 , friction speed 3m/sec, without lubrication
This is the amount of wear measured per kilometer between 20km and 60km when traveling 60km. In Table 1, Nos. 1 to 6 show cases in which only Cu was added, and Nos. 7 to 9' show cases in which Cu and Ca were added. In 0.3% P cast iron (see No. 2, 5 and No. 8, 8'), the number of eutectic cells in the present invention is approximately twice as large as that in which Cu is added alone, and the tensile strength and It can be seen that the hardness increases and the wear resistance is superior to that of 0.8% P cast iron, which was the most excellent conventional example. In addition, P content, which was conventionally considered to have inferior strength,
The wear-resistant alloy cast iron of the present invention containing 0.817% (see Nos. 9 and 9') is significantly superior to the conventional 0.2-0.3% P cast iron, and is also found to have increased hardness and the number of eutectic cells. I understand.
【表】【table】
【表】
第２図は、上記の表１をもとにした、共晶セル
数と硬さの関係をグラフにして、Cu―Caの接種
効果を調べたものであり、このように、Cu―Ca
を添加することより、硬度はほとんど変化なく、
共晶セル数を約２倍に増加させることが解る。
なお、図において、ベースと表示しているの
は、Cuを僅かしか含有しない表１のNo.１、２、
３の場合を示している。第３図及び第４図におい
ても同様である。
第３図は、同じく表１をもとに、共晶セル数と
摩耗量との関係を調べたグラフであり、このよう
に、共晶セル数の増加が耐摩耗性を大きく改善す
ることが解る。
第４図は、上記表１に基づき、Ｐ含有量と摩耗
との関係を整理したグラフであつて、これで解る
ように、Ｐ含有量を増加させるよりも、Cu―Ca
を接種した方が耐摩耗性の改善がより顕著である
ことが解る。また、同じく第４図で示すように、
Cu―Ca接種の効果は低Ｐ側へ向う方が大きくな
ることが理解できる。
第５図は、前記表１のNo.８に示す本発明耐摩耗
合金鋳鉄の顕微鏡写真であつて、第５図Ａは基地
組織を示す104倍の顕微鏡写真、第５図Ｂは同じ
くステダイトの分布を示す52倍の顕微鏡写真であ
り、同図Ｂの如く、白色で示されるステダイトが
略均一に分布していることが解る。第６図Ａ，Ｂ
は、同じく表１のNo.９に示す本発明耐摩耗合金鋳
鉄の顕微鏡写真であり、同様にＡが基地組織、Ｂ
がステダイトの分布状態を示し、同様にステダイ
トが更に均一に分布していることが解る。
表２は、上記Cu―Caに加えて更にCr、Mo、
Ｖを添加した場合の本発明の第２の発明に基づく
耐摩耗合金鋳鉄を、従来のものと比較したもので
あり、このように、表２のNo.６、７に示す本発明
の耐摩耗合金鋳鉄は、Cuのみを単独添加し、か
つ、Cr、Moの１種又は２種を添加した従来の鋳
鉄に比較して、共晶セル数が大幅に増大し、か
つ、引張強さ、硬度共に改善されていることが解
る。また、この表２に示す第２の発明の耐摩耗合
金鋳鉄は、表１のCu―Caのみを添加した第１の
発明の耐摩耗合金鋳鉄に比較しても、その機械的
性質が向上している。[Table] Figure 2 is a graph of the relationship between the number of eutectic cells and hardness, based on Table 1 above, to investigate the inoculation effect of Cu-Ca. ―Ca
By adding , there is almost no change in hardness,
It can be seen that the number of eutectic cells is approximately doubled. In addition, in the figure, the base is indicated as No. 1, 2, and No. 1 in Table 1, which contain only a small amount of Cu.
Case 3 is shown. The same applies to FIGS. 3 and 4. Figure 3 is a graph examining the relationship between the number of eutectic cells and the amount of wear based on Table 1, and shows that increasing the number of eutectic cells greatly improves wear resistance. I understand. Figure 4 is a graph that organizes the relationship between P content and wear based on Table 1 above. As can be seen, Cu-Ca
It can be seen that the improvement in wear resistance is more remarkable when inoculated with Also, as shown in Figure 4,
It can be seen that the effect of Cu-Ca inoculation becomes greater toward the low P side. FIG. 5 is a micrograph of the wear-resistant alloy cast iron of the present invention shown in No. 8 of Table 1, in which FIG. 5A is a 104x micrograph showing the matrix structure, and FIG. 5B is a micrograph of steadite. This is a 52x micrograph showing the distribution, and as shown in Figure B, it can be seen that the steadite shown in white is distributed almost uniformly. Figure 6 A, B
is a micrograph of the wear-resistant alloy cast iron of the present invention shown in No. 9 of Table 1, where A is the matrix structure and B
shows the distribution state of steadite, and it can be seen that steadite is also distributed more uniformly. Table 2 shows that in addition to the above Cu-Ca, Cr, Mo,
The wear-resistant alloy cast iron based on the second invention of the present invention in which V is added is compared with the conventional one. Alloy cast iron has a significantly increased number of eutectic cells, and has improved tensile strength and hardness compared to conventional cast iron that only contains Cu and one or both of Cr and Mo. It can be seen that both have improved. Furthermore, the wear-resistant alloy cast iron of the second invention shown in Table 2 has improved mechanical properties compared to the wear-resistant alloy cast iron of the first invention in which only Cu-Ca is added in Table 1. ing.
【表】【table】
【表】
以上述べたように、本発明の耐摩耗合金鋳鉄
は、共晶セル数が多く、耐摩耗性が良好で、しか
も強度が大であり、シリンダライナー等の摺動用
部材として最適である。[Table] As described above, the wear-resistant cast iron alloy of the present invention has a large number of eutectic cells, good wear resistance, and high strength, making it ideal for sliding members such as cylinder liners. .
第１図は、従来技術におけるＰ含有量とライナ
ー摩耗量との関係を示すグラフ、第２図は、本発
明の実施例における共晶セル数と硬さの関係を示
すグラフ、第３図は、同じく共晶セル数と摩耗の
関係を示すグラフ、第４図は、同様にＰ含有量と
摩耗量の関係を示すグラフであり、更に、第５図
Ａ，Ｂ及び第６図Ａ，Ｂは本発明によつて得られ
た耐摩耗合金鋳鉄の顕微鏡写真であつて、Ａは、
ビクラルエツチを施して基地組織を示す104倍の
顕微鏡写真、Ｂはナイタルエツチを施してステダ
イトの分布状況を示した52倍の顕微鏡写真であ
る。
FIG. 1 is a graph showing the relationship between P content and liner wear amount in the conventional technology, FIG. 2 is a graph showing the relationship between the number of eutectic cells and hardness in an example of the present invention, and FIG. , FIG. 4 is a graph similarly showing the relationship between the number of eutectic cells and wear, and FIG. 4 is a graph similarly showing the relationship between P content and amount of wear. A is a micrograph of the wear-resistant alloy cast iron obtained by the present invention, and A is a
B is a 104x microphotograph with vicural etching showing the matrix structure, and B is a 52x microphotograph with nital etching showing the distribution of steadite.
Claims (1)
有し、残部Feである鋳鉄溶湯に、Cu及びCa又は
Cu及びCa―Siを、各添加剤の単独又は合金の何
れかの状態で添加し、最終的に、C2.8〜3.8％、
Si1.5〜2.5％、Mn0.4〜1.2％、P0.2〜0.8％、
S0.12％以下、及びCu0.3〜1.5％、Ca0.01％以下
を含有させることを特徴とする耐摩耗合金鋳鉄の
製造方法。 ２ Ｃ、Si、Mn、Ｐ、Ｓ及び不可避不純物を含
有し、残部Feである鋳鉄溶湯に、Cu及びCa又は
Cu及びCa―Siを、各添加剤の単独又は合金の何
れかの状態で添加し、最終的に、C2.8〜3.8％、
Si1.5〜2.5％、Mn0.4〜1.2％、P0.2〜0.8％、
S0.12％以下、及びCu0.3〜1.5％、Ca0.01％以下
を含有させ、かつ、Cr0.8％以下、Mo0.8％以
下、V0.5％以下の１種又は２種以上を含有させ
ることを特徴とする耐摩耗合金鋳鉄の製造方法。[Claims] 1. Cu and Ca or
Cu and Ca-Si are added either individually or as an alloy, and finally, C2.8 to 3.8%,
Si1.5~2.5%, Mn0.4~1.2%, P0.2~0.8%,
A method for producing a wear-resistant cast iron alloy, characterized by containing 0.12% or less of S, 0.3 to 1.5% of Cu, and 0.01% or less of Ca. 2 Cu and Ca or
Cu and Ca-Si are added either individually or as an alloy, and finally, C2.8 to 3.8%,
Si1.5~2.5%, Mn0.4~1.2%, P0.2~0.8%,
Contains S0.12% or less, Cu0.3-1.5%, Ca0.01% or less, and one or more of Cr0.8% or less, Mo0.8% or less, and V0.5% or less. A method for manufacturing a wear-resistant alloy cast iron, characterized by containing a wear-resistant alloy cast iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7970781A JPS57194241A (en) | 1981-05-26 | 1981-05-26 | Wear resistant cast ferroalloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7970781A JPS57194241A (en) | 1981-05-26 | 1981-05-26 | Wear resistant cast ferroalloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57194241A JPS57194241A (en) | 1982-11-29 |
| JPS6155578B2 true JPS6155578B2 (en) | 1986-11-28 |
Family
ID=13697670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7970781A Granted JPS57194241A (en) | 1981-05-26 | 1981-05-26 | Wear resistant cast ferroalloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57194241A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0182389U (en) * | 1987-11-24 | 1989-06-01 | ||
| RU2588965C1 (en) * | 2015-02-25 | 2016-07-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Иркутский государственный технический университет" (ФГБОУ ВПО "ИрГТУ") | Method for modification of cast iron |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60138050A (en) * | 1983-12-26 | 1985-07-22 | Toyota Motor Corp | Corrosion and wear resistant cast iron |
| JPS61136659A (en) * | 1984-12-08 | 1986-06-24 | Yanmar Diesel Engine Co Ltd | Cylinder liner for diesel engine |
| JP2775159B2 (en) * | 1988-10-13 | 1998-07-16 | ヤンマーディーゼル株式会社 | Combination of cylinder liner and piston ring for internal combustion engine |
| JP2593759B2 (en) * | 1992-01-30 | 1997-03-26 | 川崎製鉄株式会社 | Wear-resistant phosphorus eutectic cast iron |
| KR101404754B1 (en) | 2011-11-14 | 2014-06-13 | 엘지전자 주식회사 | Alloy cast iron and manufacturing method of rolling piston using the same |
| CN105755359B (en) * | 2016-02-29 | 2017-07-28 | 昆明云内动力股份有限公司 | Suitable for the production technology of diesel motor cylinder, the material of cylinder cap |
| BR112017008486B1 (en) * | 2016-09-05 | 2021-06-15 | Tpr Co., Ltd. | CYLINDRICAL ELEMENT MADE OF FLAKE GRAPHITE CAST IRON |
| CN115537642B (en) * | 2022-10-30 | 2023-05-02 | 北京工业大学 | Refining method of hypereutectic high-chromium cast iron primary carbide |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52124651A (en) * | 1976-04-13 | 1977-10-19 | Mitsubishi Electric Corp | Device for controlling elevator |
-
1981
- 1981-05-26 JP JP7970781A patent/JPS57194241A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52124651A (en) * | 1976-04-13 | 1977-10-19 | Mitsubishi Electric Corp | Device for controlling elevator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0182389U (en) * | 1987-11-24 | 1989-06-01 | ||
| RU2588965C1 (en) * | 2015-02-25 | 2016-07-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Иркутский государственный технический университет" (ФГБОУ ВПО "ИрГТУ") | Method for modification of cast iron |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57194241A (en) | 1982-11-29 |
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