JPH0230730A - Wear-resistant alloyed cast iron - Google Patents
Wear-resistant alloyed cast ironInfo
- Publication number
- JPH0230730A JPH0230730A JP18001188A JP18001188A JPH0230730A JP H0230730 A JPH0230730 A JP H0230730A JP 18001188 A JP18001188 A JP 18001188A JP 18001188 A JP18001188 A JP 18001188A JP H0230730 A JPH0230730 A JP H0230730A
- Authority
- JP
- Japan
- Prior art keywords
- cast iron
- carbide
- graphite
- resistance
- type
- 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.)
- Granted
Links
- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 36
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 27
- 239000010439 graphite Substances 0.000 claims abstract description 27
- 150000001247 metal acetylides Chemical class 0.000 claims abstract description 23
- 229910052748 manganese Inorganic materials 0.000 claims abstract 2
- 229910052759 nickel Inorganic materials 0.000 claims abstract 2
- 229910045601 alloy Inorganic materials 0.000 claims description 25
- 239000000956 alloy Substances 0.000 claims description 25
- 239000012535 impurity Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- -1 M_4C_3 series Chemical class 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 abstract description 16
- 239000002184 metal Substances 0.000 abstract description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 238000005266 casting Methods 0.000 abstract description 4
- 238000011081 inoculation Methods 0.000 abstract description 4
- 239000002054 inoculum Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 4
- 229910052720 vanadium Inorganic materials 0.000 abstract description 4
- 229910017082 Fe-Si Inorganic materials 0.000 abstract description 2
- 229910017133 Fe—Si Inorganic materials 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000003746 surface roughness Effects 0.000 abstract description 2
- 229910052804 chromium Inorganic materials 0.000 abstract 2
- 239000000463 material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 230000002087 whitening effect Effects 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 229910001563 bainite Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007788 roughening Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 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
- 238000005097 cold rolling Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は耐摩耗性のほかに耐肌あれ性或いは耐焼付性な
どが要求され、熱間或いは冷間にて使用される圧延用ロ
ールなどの工具用鋳鉄に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to rolling rolls, etc., which are required to have roughness resistance or seizure resistance in addition to abrasion resistance, and are used in hot or cold rolling. This relates to cast iron for tools.
鋳鉄の耐摩耗性を向上させるためには、硬質の炭化物を
晶出あるいは析出させることが有効である。とりわけ、
Ｍｏ、 Ｖ等の炭化物は硬さが大きく、その効果は大き
い。In order to improve the wear resistance of cast iron, it is effective to crystallize or precipitate hard carbides. Above all,
Carbides such as Mo and V have high hardness and have a large effect.
一方、鋳鉄の主要組織である黒鉛は熱伝導性が良好であ
るため工具表面の摩擦による加熱昇温を抑制し耐摩耗性
、耐肌あれ性を向上させる作用を有するとともに、固体
潤滑剤としての作用を持つため耐焼付性、耐摩耗性に有
効である。ところが、上記硬質の炭化物を形成するＭＯ
ｌＶなどの元素は同時に強い白銑化元素であり、これら
硬質炭化物と黒鉛が共存する鋳鉄は従来得られていなか
った。On the other hand, graphite, which is the main structure of cast iron, has good thermal conductivity, so it has the effect of suppressing heating temperature rise due to friction on the tool surface and improving wear resistance and roughness resistance. It is effective in improving seizure resistance and wear resistance. However, the MO that forms the hard carbide mentioned above
Elements such as lV are also strong whitening elements, and cast iron in which these hard carbides and graphite coexist has not been obtained so far.
黒鉛と炭化物を有する耐摩耗合金鋳鉄として、従来から
ニハード系の合金鋳鉄が一般的に知られている。この鋳
鉄の炭化物はＭ２Ｃ系が主体であり、硬さも小さい。一
方、特公昭６１−１６４１５号公報にはＣｒ炭化物つま
りＭ２Ｃ，系或いはＭ２３Ｇ、系主体の炭化物を有する
圧延ロール用の合金鋳鉄が開示されているが、更に硬質
のＭＣ，Ｍ４Ｃ，、Ｍ６Ｃ，Ｍ２Ｃなどの炭化物は殆ん
ど存在せず、高耐摩耗性は期待できない、また、黒鉛と
硬質炭化物が共存した材料として、従来から粉末焼結合
金があるが、鋳造合金に比べて製造プロセスが複雑であ
るのでコストが高くなる。Nihard alloy cast iron has been generally known as a wear-resistant cast iron alloy containing graphite and carbides. The carbides in this cast iron are mainly M2C-based and have low hardness. On the other hand, Japanese Patent Publication No. Sho 61-16415 discloses alloy cast iron for rolling rolls having Cr carbide, that is, M2C, M23G, or M23G carbide, but even harder MC, M4C, M6C, M2C Powder sintered alloys have been available as materials that contain graphite and hard carbides, but the manufacturing process is more complicated than that of cast alloys. Therefore, the cost becomes high.
強力な白銑化元素を含有する鋳鉄材に黒鉛を存在させる
のは不可能とするのが従来の技術通念であった。このよ
うな状況のもとに、本発明の目的は黒鉛と強力な白銑化
元素にて構成した硬質炭化物とを共存させた新規な耐摩
耗合金鋳鉄を伜供することである。Conventional technical wisdom has been that it is impossible to have graphite present in cast iron containing strong whitening elements. Under these circumstances, the object of the present invention is to provide a new wear-resistant cast iron alloy in which graphite and hard carbide made of a strong whitening element coexist.
本発明者は上記問題を解決するため鋭意研究を行ない、
次の新しい事実を発見するに至った。The present inventor has conducted extensive research to solve the above problems,
I came to discover the following new fact.
（１） 黒鉛と強力な白銑化元素の炭化物とが共存した
金属組織を有する合金鋳鉄があり、これらの炭化物の形
態はＭＣ系、Ｍ２Ｏ３系、Ｍ２Ｃ系、Ｍ２Ｃ系などの硬
質炭化物であって、全炭化物中に面積率で２０％以上を
占めていること。(1) There is an alloy cast iron that has a metal structure in which graphite and carbides of strong white iron-forming elements coexist, and these carbides are in the form of hard carbides such as MC type, M2O3 type, M2C type, and M2C type. , occupying 20% or more of the total carbide in terms of area ratio.
（２） 本発明合金鋳鉄の好適な化学成分例として、重
量比でＣ２，５〜４．０％、ＳＬ２．０〜５．０％、Ｍ
ｎ０゜１〜１．５％、Ｎｉ３〜８％、 Ｃｒ７％以下、
Ｍ０４〜１２％、７２〜８％、残部不純物元素及び実質
的にＦｅからなる成分系があり、更にＣｏ２〜８％を含
有することができること。(2) Examples of suitable chemical components of the alloy cast iron of the present invention include C2.5 to 4.0%, SL2.0 to 5.0%, M
n0°1~1.5%, Ni3~8%, Cr7% or less,
There is a component system consisting of M04-12%, 72-8%, the remainder impurity elements and substantially Fe, and can further contain Co2-8%.
まず、本発明により黒鉛と全炭化物の２０％以上を占め
る硬質炭化物とが共存する合金鋳鉄が得られ、黒鉛と硬
質炭化物の両者が発揮する作用効果を兼備した新規な工
具材料を安価に得ることができる。つまり、硬質炭化物
により高耐摩耗性を有し、黒鉛により高熱伝導性、自己
潤滑作用を有するのである。この結果、耐摩耗性はもち
ろん耐焼付性、耐肌あれ性に優れた合金鋳鉄を得ること
ができる。First, according to the present invention, an alloy cast iron in which graphite and hard carbides that account for 20% or more of the total carbides coexist can be obtained, and a new tool material that has the functions and effects of both graphite and hard carbides can be obtained at a low cost. I can do it. In other words, the hard carbide provides high wear resistance, and the graphite provides high thermal conductivity and self-lubrication. As a result, it is possible to obtain an alloy cast iron that is excellent in not only wear resistance but also seizure resistance and roughening resistance.
次に、本発明合金鋳鉄の化学成分の特定理由は次の通り
である。Next, the reason for specifying the chemical components of the alloy cast iron of the present invention is as follows.
Ｃは黒鉛を晶出させるとともに硬質炭化物形成のために
必要な元素である。その量が２．５％未満の場合、黒鉛
の晶出が困難になるとともに炭化物量が少なく、耐摩耗
性、耐焼付性、耐肌あれ性の点で十分でない。また、４
．０％を越える炭化物が過剰となり、靭性が低下するの
で好ましくない。C is an element necessary for crystallizing graphite and forming hard carbide. If the amount is less than 2.5%, it becomes difficult to crystallize graphite and the amount of carbide is small, resulting in insufficient wear resistance, seizure resistance, and roughness resistance. Also, 4
．． Carbides exceeding 0% are excessive and reduce toughness, which is not preferable.
ＳＬは脱酸剤であるとともに有効な黒鉛化促進元素であ
るため２．０％以上必要である。しかし、５．０％を越
えると材質が脆弱になる。そして、黒鉛を晶出させるた
めには、添加Ｓｉ量のうち０．１％以上を接種にて添加
する必要がある。SL is a deoxidizing agent and an effective graphitization promoting element, so it is necessary to have a content of 2.0% or more. However, if it exceeds 5.0%, the material becomes brittle. In order to crystallize graphite, it is necessary to add 0.1% or more of the added Si amount by inoculation.
Ｋｎは脱酸作用とともに不純物であるＳをＭｎＳとして
固定する。その量が０．１％未満では脱酸性に乏しい、
しかし、１．５％を越えると残留オーステナイトが生じ
やすくなり、安定して十分な硬さを維持できない。Kn has a deoxidizing effect and also fixes impurity S as MnS. If the amount is less than 0.1%, deoxidizing properties are poor.
However, if it exceeds 1.5%, retained austenite tends to occur and sufficient hardness cannot be stably maintained.
Ｎｉは黒鉛の晶出および基地の焼入性向上のため必要で
あり、３．０％以上添加する必要がある。しかし、８％
を越えるとオーステナイトが安定化しすぎ、ベイナイト
或いはマンテンサイドへの変態が生じにくくなる。この
ため十分な硬さが得られず、耐摩耗性、耐肌あれ性が劣
化する。Ni is necessary for crystallizing graphite and improving the hardenability of the matrix, and needs to be added in an amount of 3.0% or more. However, 8%
If the value exceeds this value, austenite becomes too stable and transformation into bainite or mantenside becomes difficult. For this reason, sufficient hardness cannot be obtained, and abrasion resistance and roughness resistance deteriorate.
Ｃｒは基地をベイナイト或いはマルテンサイトにして硬
さを保持するのに有効に作用する元素である。しかし、
過剰になると黒鉛の晶出を阻害するとともにＣｒ系炭化
物即ちＭ、 Ｃ３系やＭ２３Ｃ６系炭化物を形成する。Cr is an element that effectively maintains hardness by turning the base into bainite or martensite. but,
If it is in excess, it inhibits the crystallization of graphite and forms Cr-based carbides, that is, M, C3-based and M23C6-based carbides.
これらの炭化物はＭＣ系１Ｍ４Ｃ３系、Ｍ２Ｃ系、Ｍ２
Ｃ系に比べて硬さが小さく、耐摩耗性を低下させる。こ
のためＣｒの上限は７％とする。These carbides are MC type 1M4C3 type, M2C type, M2
Hardness is lower than that of C type, reducing wear resistance. Therefore, the upper limit of Cr is set to 7%.
ＭｏはＣと結合してＭ２Ｃ或いはＭ２Ｃ系炭化物を生成
し、かつ基地中にも固溶して基地を強化するので耐摩耗
性や高温硬さを高めるとともに、焼戻軟化抵抗性向上に
寄与する。しかし、過剰になると黒鉛の晶出を阻害する
とともにＣとＶとのバランスにおいてＭ６Ｃ系炭化物が
増加し、靭性及び耐肌あれ性の点で好ましくない。これ
らによりＭ。Mo combines with C to produce M2C or M2C-based carbides, and also forms a solid solution in the base to strengthen the base, increasing wear resistance and high-temperature hardness, and contributing to improved temper softening resistance. . However, if it is in excess, it inhibits the crystallization of graphite and increases M6C-based carbides in the balance between C and V, which is unfavorable in terms of toughness and roughness resistance. With these, M.
の添加範囲は４〜１２％である。The addition range is 4 to 12%.
■は耐摩耗性の向上に効果のあるＭＣ系炭化物を形成す
るための必須元素であるが、過剰になると黒鉛の晶出を
堕害する。このためＶの添加範囲は２〜８％とする。(2) is an essential element for forming MC-based carbide, which is effective in improving wear resistance, but in excess, it impairs the crystallization of graphite. Therefore, the addition range of V is 2 to 8%.
本発明の合金鋳鉄は上記元素の他にｃｏを含有すること
ができる。Ｃｏは焼戻し軟化抵抗と二次硬化により耐熱
性を付与する点で好ましい元素であるが、過剰になると
靭性を低下させる。このためＣ。The alloy cast iron of the present invention may contain cobalt in addition to the above elements. Co is a preferable element in that it imparts heat resistance through temper softening resistance and secondary hardening, but if it is in excess, it reduces toughness. For this reason, C.
の添加範囲は２〜８％とする。The addition range is 2 to 8%.
上記元素以外は不純物を除いて実績的にＦｅからなる。Elements other than the above are actually composed of Fe, excluding impurities.
不純物として主なものはＰ及びＳであるが、Ｐは脆化防
止のため０．１％以下であり、Ｓは同様に０．０８％以
下であるのがよい。The main impurities are P and S, but P is preferably 0.1% or less to prevent embrittlement, and S is preferably 0.08% or less.
本発明の合金鋳鉄においては、上述の化学成分の特定に
加えて、更に溶湯状態のとき、鋳型へ溶湯を注入する以
前にＳｉ含有の接種剤を用いて接種する必要がある。黒
鉛晶出のために、接種Ｓｉ量は重量比で０．１％以上必
要であるが、０．５％を越えると接種剤が溶湯に均一に
溶けにくくなり、鋳造された合金鋳鉄に組織む°らが生
じやすくなる。In addition to specifying the above-mentioned chemical components, the cast iron alloy of the present invention requires inoculation using a Si-containing inoculant before pouring the molten metal into the mold. In order to crystallize graphite, the amount of inoculated Si must be at least 0.1% by weight, but if it exceeds 0.5%, the inoculant becomes difficult to dissolve uniformly in the molten metal, and it may form a structure in the cast alloy cast iron. ° etc. are more likely to occur.
叉１Ｊ１−
第１表の試片記号Ａ及びＢにて示す成分の本発明合金鋳
鉄を、高周波誘導溶解炉を用いて１６００℃にて溶解し
、出湯時にＦｅ−Ｓｉ合金によりＳｉ量で０．３％接種
し、１５５０℃にて直径１００ｍｍ、深さ１００＋ｎ＋
ａの砂型に鋳造して試片を製作した。この試片の外周表
面から１５ｍｍ位置にて金属組織を検鏡調査した。いず
れの試片も黒鉛と硬質炭化物が認められた。このうち試
片Ｂの金属組織例を第１図に示す。同図（１）は腐食し
ない状態における組織、（２）は腐食した後の組織であ
る。同図（１）において。1J1- The alloyed cast iron of the present invention having the components indicated by sample symbols A and B in Table 1 is melted at 1600°C using a high frequency induction melting furnace, and when tapped, the Fe-Si alloy has a Si content of 0. 3% inoculation, 100mm diameter, 100+n+ depth at 1550℃
A specimen was produced by casting in a sand mold. The metallographic structure of this sample was examined using a microscope at a position 15 mm from the outer peripheral surface. Graphite and hard carbide were observed in all specimens. An example of the metallographic structure of sample B is shown in FIG. Figure (1) shows the structure in a non-corroded state, and (2) shows the structure after corrosion. In the same figure (1).
片状及び塊状の黒鉛が明瞭にみられる。この場合の黒鉛
面積率は２％であった。同図（２）においても黒鉛がみ
られる。更に、塊状に晶出しているのはＶのＭ２Ｏ３系
、粒状に晶出しているのはＶのＭＣ系、背骨状に晶出し
ているのはＭｏのＭ２Ｃ系炭化物であった。この場合の
これら硬質炭化物の面積は全炭化物の面積の８５％を占
めていた。Flaky and lumpy graphite can be clearly seen. The graphite area ratio in this case was 2%. Graphite can also be seen in figure (2). Furthermore, the M2O3-based carbide of V was crystallized in lumps, the MC-based carbide of V was crystallized in grains, and the M2C-based carbide of Mo was crystallized in spines. In this case, the area of these hard carbides accounted for 85% of the total area of carbides.
尖立盤又
実施例１にて製作した試片に１０５０℃からの焼入れと
５５０℃での焼戻しの熱処理を施し、第１表に示す硬さ
に調整した後、外径６０ｍｍ長さ４０ｍｍの小型スリー
ブロール試片を加工した。この試片を第３図に示す圧延
摩耗試験機にとりつけて耐摩耗性の試験を行なった。同
図において５及び５′が試片としてのロールである。比
較用の従来材質として、前記特公昭６１−１６４１５号
公報に記載されている圧延ロール用Ｃｒ炭化物系合金鋳
鉄に類似の合金鋳鉄ロール試片を製作した。このロール
試片については第１表に試片記号Ｃとして示す。The test piece produced in Example 1 was heat-treated at 1050°C and tempered at 550°C, and the hardness was adjusted to the hardness shown in Table 1. A sleeve roll specimen was processed. This test piece was attached to a rolling abrasion tester shown in FIG. 3, and a wear resistance test was conducted. In the figure, 5 and 5' are rolls serving as specimens. As a conventional material for comparison, alloy cast iron roll specimens similar to the Cr carbide alloy cast iron for rolling rolls described in the above-mentioned Japanese Patent Publication No. 16415/1982 were manufactured. This roll specimen is shown as specimen symbol C in Table 1.
圧延摩耗試験の条件は次の通りである。The conditions for the rolling wear test are as follows.
圧延材料：ＳＵＳ’３０４
圧下率＝２５％
圧延速度： １５０ ｍ／＋ｉｎ
圧延材料の温度：９００℃
圧延距離：３００ｍ
ロール冷却方法：水冷
試験後のロール試片表面の圧延材料と接触した部分は摩
耗して凹状になる。また、肌あれや焼付が発生すると摩
耗面には小さな凹凸が発生する。Rolling material: SUS'304 Reduction rate = 25% Rolling speed: 150 m/+in Temperature of rolling material: 900°C Rolling distance: 300 m Roll cooling method: After water cooling test, the part of the surface of the roll specimen that came into contact with the rolling material was worn out and become concave. Furthermore, when roughness or seizure occurs, small irregularities occur on the worn surface.
各試片の摩耗・肌あれプロフィールを表面あらさ計（Ｓ
ＵＲＦＣＯＭ）にて測定したが、その例を第２図に示す
。同図（１）は試片記号Ｂ（本発明）の上ロール、（２
）は試片記号Ｃ（従来）の上ロールの状況を示すもので
ある。第１表には各上ロールの摩耗した部分の平均深さ
についても示す。The wear and roughness profile of each specimen was measured using a surface roughness meter (S
An example of the measurement is shown in Fig. 2. The same figure (1) shows the upper roll of specimen code B (invention), (2
) indicates the condition of the upper roll of specimen code C (conventional). Table 1 also shows the average depth of the worn portion of each upper roll.
この試験結果から、本発明の合金鋳鉄Ａ、Ｂは従来例Ｃ
のＣｒ炭化物系の圧延ロール用合金鋳鉄に比べて、耐摩
耗性が格段に優れ、摩耗面の凹凸は小さいことがわかる
。From this test result, alloy cast irons A and B of the present invention were compared to conventional example C.
It can be seen that the wear resistance is much better than that of the Cr carbide-based alloy cast iron for rolling rolls, and the unevenness of the worn surface is small.
以上の実施例により、本発明の合金鋳鉄は工具用鋳鉄と
して実用に供してきわめて優れた性能を発揮することが
期待される。なお、圧延用ロールとして用いる場合は、
スリーブ又はリング式ロールにして用いたり、或いは基
本的には特公昭４４−４９０３号公報ほかに開示されい
ている連続肉盛鋳造法によって複合ロールにして用いる
ことなどができる。Based on the above examples, it is expected that the alloy cast iron of the present invention will exhibit extremely excellent performance when put to practical use as cast iron for tools. In addition, when used as a rolling roll,
It can be used in the form of a sleeve or ring type roll, or it can be used as a composite roll by the continuous overlay casting method basically disclosed in Japanese Patent Publication No. 44-4903 and others.
本発明によれば、黒鉛と硬質炭化物とが共存するという
従来にない金属組織を有する耐摩耗性、耐焼付性、耐肌
あれ性に優れた工具用鋳鉄を、鋳造という簡単な製造プ
ロセスにより製造することが可能となった。そして、各
用途の耐摩耗部材に適用して、きわめて優れた性能の向
上が達成できる。According to the present invention, cast iron for tools, which has an unprecedented metal structure in which graphite and hard carbides coexist and has excellent wear resistance, seizure resistance, and surface roughening resistance, is manufactured using a simple manufacturing process called casting. It became possible to do so. By applying the present invention to wear-resistant members for various purposes, extremely excellent performance improvements can be achieved.
第１図は本発明実施例合金鋳鉄の金属組織写真を示し、
（１）は腐食しないとき、（２）は腐食後の状態を示す
。第２図は圧延摩耗試験をしたときの試片表面のプロフ
ィールを示し、（１）は本発明実施例、（２）は従来例
合金鋳鉄の状況を示す。第３図圧は延摩耗試験機の概略
説明図である。
１：加熱炉 ２：圧延材
４：圧延機 ５：上ロール（試片）５′
：下ロール（試片） ８：巻取機第 １ 図
（丁）
第２図
Ｌ−一」
２０袈ル
与熊FIG. 1 shows a photograph of the metallographic structure of alloy cast iron according to an example of the present invention.
(1) shows the state without corrosion, and (2) shows the state after corrosion. FIG. 2 shows the profile of the specimen surface when subjected to a rolling wear test, in which (1) shows the situation of the example of the present invention, and (2) shows the situation of the conventional alloy cast iron. Figure 3 is a schematic explanatory diagram of a rolling wear tester. 1: Heating furnace 2: Rolled material 4: Rolling machine 5: Upper roll (sample) 5'
: Lower roll (sample) 8: Winding machine Fig. 1 (Double) Fig. 2 L-1'' 20 keru yokuma
Claims (3)
系、Ｍ＿４Ｃ＿３系、Ｍ＿６Ｃ系、Ｍ＿２Ｃ系などの硬
質炭化物とを有することを特徴とする耐摩耗合金鋳鉄。(1) MC with area ratio of 20% or more in graphite and carbide structure
A wear-resistant alloy cast iron characterized by having hard carbides such as M_4C_3 series, M_6C series, M_2C series, etc.
．０〜５．０％、Ｍｎ０．１〜１．５％、Ｎｉ３〜８％
、Ｃｒ７％以下、Ｍｏ４〜１２％、Ｖ２〜８％、残部不
純物元素及び実質的にＦｅからなる請求項１記載の耐摩
耗合金鋳鉄。(2) Chemical components are C2.5-4.0% by weight, Si2
．． 0-5.0%, Mn 0.1-1.5%, Ni 3-8%
, 7% or less of Cr, 4 to 12% of Mo, 2 to 8% of V, the balance being impurity elements, and the wear-resistant cast iron alloy according to claim 1, comprising substantially Fe.
とする請求項２記載の耐摩耗合金鋳鉄。(3) The wear-resistant cast iron alloy according to claim 2, further containing 2 to 8% Co by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63180011A JP2542681B2 (en) | 1988-07-19 | 1988-07-19 | Wear-resistant alloy cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63180011A JP2542681B2 (en) | 1988-07-19 | 1988-07-19 | Wear-resistant alloy cast iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0230730A true JPH0230730A (en) | 1990-02-01 |
| JP2542681B2 JP2542681B2 (en) | 1996-10-09 |
Family
ID=16075894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63180011A Expired - Lifetime JP2542681B2 (en) | 1988-07-19 | 1988-07-19 | Wear-resistant alloy cast iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2542681B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0665068A1 (en) * | 1993-03-31 | 1995-08-02 | Hitachi Metals, Ltd. | Wear- and seizure-resistant roll for hot rolling |
| FR2835850A1 (en) * | 2002-02-12 | 2003-08-15 | Winsert Inc | Iron-based alloy used in the production of a valve seat ring in an internal combustion engine contains alloying additions of carbon, chromium, silicon, molybdenum, nickel and optionally cobalt, vanadium, niobium, manganese and tungsten |
| US7520364B2 (en) | 2004-08-31 | 2009-04-21 | Yanmar Co., Ltd. | Tractor |
| US7611590B2 (en) | 2004-07-08 | 2009-11-03 | Alloy Technology Solutions, Inc. | Wear resistant alloy for valve seat insert used in internal combustion engines |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58193343A (en) * | 1982-04-30 | 1983-11-11 | Kubota Ltd | High chromium roll containing graphite |
| JPS61177355A (en) * | 1985-01-31 | 1986-08-09 | Kubota Ltd | Outer layer material of composite roll for rolling |
-
1988
- 1988-07-19 JP JP63180011A patent/JP2542681B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58193343A (en) * | 1982-04-30 | 1983-11-11 | Kubota Ltd | High chromium roll containing graphite |
| JPS61177355A (en) * | 1985-01-31 | 1986-08-09 | Kubota Ltd | Outer layer material of composite roll for rolling |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0665068A1 (en) * | 1993-03-31 | 1995-08-02 | Hitachi Metals, Ltd. | Wear- and seizure-resistant roll for hot rolling |
| EP0665068A4 (en) * | 1993-03-31 | 1997-06-11 | Hitachi Metals Ltd | Wear- and seizure-resistant roll for hot rolling. |
| FR2835850A1 (en) * | 2002-02-12 | 2003-08-15 | Winsert Inc | Iron-based alloy used in the production of a valve seat ring in an internal combustion engine contains alloying additions of carbon, chromium, silicon, molybdenum, nickel and optionally cobalt, vanadium, niobium, manganese and tungsten |
| US6916444B1 (en) | 2002-02-12 | 2005-07-12 | Alloy Technology Solutions, Inc. | Wear resistant alloy containing residual austenite for valve seat insert |
| DE10305568B4 (en) * | 2002-02-12 | 2012-11-29 | Winsert, Inc. | Wear-resistant alloy containing retained austenite for valve seat inserts |
| US7611590B2 (en) | 2004-07-08 | 2009-11-03 | Alloy Technology Solutions, Inc. | Wear resistant alloy for valve seat insert used in internal combustion engines |
| US7520364B2 (en) | 2004-08-31 | 2009-04-21 | Yanmar Co., Ltd. | Tractor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2542681B2 (en) | 1996-10-09 |
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