JPS63433A - Low thermal expansion and high damping capacity cv cast iron - Google Patents
Low thermal expansion and high damping capacity cv cast ironInfo
- Publication number
- JPS63433A JPS63433A JP14459486A JP14459486A JPS63433A JP S63433 A JPS63433 A JP S63433A JP 14459486 A JP14459486 A JP 14459486A JP 14459486 A JP14459486 A JP 14459486A JP S63433 A JPS63433 A JP S63433A
- Authority
- JP
- Japan
- Prior art keywords
- thermal expansion
- cast iron
- graphite
- low thermal
- damping capacity
- 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.)
- Pending
Links
- 238000013016 damping Methods 0.000 title claims abstract description 18
- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 22
- 239000010439 graphite Substances 0.000 claims abstract description 22
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 5
- 229910052748 manganese Inorganic materials 0.000 claims abstract 2
- 235000000396 iron Nutrition 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 230000007423 decrease Effects 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 5
- 229910001141 Ductile iron Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 241000594009 Phoxinus phoxinus Species 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 235000011835 quiches Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Landscapes
- 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〕
本発明は超精密加工用工作機部材等に用いるのに適した
低熱膨張・高減衰能ＣＶＳＲ鉄に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to low thermal expansion and high damping capacity CVSR iron suitable for use in ultra-precision machining machine tool members and the like.
従来、工作機用ベッドなどには片状黒鉛鋳鉄が使用され
ていた。この材質の機械的及び物理的性質性質は引張強
さが１０〜２０ ｋｇｆ ／ ｍｍ” 、熱膨張係数が
１０〜１２Ｘ１０−’程度で、比較的減衰能の大きいも
の（対数減衰率２．０〜５．○ＸＬＯ’−２）であった
。近年、工作機による加工精度の要求が飛費的に厳しく
なり、これに伴って工作機を構成する材料も気温による
寸法変化の少い低熱膨張材が要求されるようになってい
る。Traditionally, flake graphite cast iron has been used for machine tool beds. The mechanical and physical properties of this material include a tensile strength of 10 to 20 kgf/mm'', a thermal expansion coefficient of approximately 10 to 12 x 10-', and a relatively large damping capacity (logarithmic damping rate of 2.0 to 2.0). 5.○ is now required.
これらの要求に応える熱膨張係数が５．０〜６゜０ＸＩ
Ｏ−１′程度の鋳鉄材料は、片状黒鉛系としてはミノ−
パー鋳鉄、球状黒鉛系としてはニレジスト鋳鉄（Ｄ−５
）などがか既に存在する。The thermal expansion coefficient is 5.0~6゜0XI to meet these requirements.
Cast iron materials with a grade of O-1' are minnow-based as flaky graphite.
Par cast iron, Niresist cast iron (D-5
) etc. already exist.
しかし、片状黒鉛系材質は減衰能は対数減衰率で２．５
〜４．５Ｘ１０””程度であるが引張強さが２０ｋｇｆ
／ｍｍ２以下と低く、２０ｋｇｆ／ｍｍ２以上の要求機
能部品には適用困難である。However, the damping capacity of flaky graphite material is 2.5 in terms of logarithmic damping rate.
〜4.5X10'' but the tensile strength is 20kgf
/mm2 or less, making it difficult to apply to functional parts requiring 20kgf/mm2 or more.
一方１球状黒鉛鋳鉄系は引張強さこそ２５ｋｇｆ／ｍｍ
２以上と高い値を示すが、工作機部品に屡々要求される
減衰能が対数減衰率で１．０〜１．５ｘ ＩＱ−２と低
いために要求に応え得ない場合がある。On the other hand, the tensile strength of 1 spheroidal graphite cast iron is 25 kgf/mm.
Although it shows a high value of 2 or more, the damping capacity often required for machine tool parts is as low as 1.0 to 1.5x IQ-2 in terms of logarithmic damping rate, so it may not be able to meet the demand.
本発明のｌ」的は、Ｉ）ｉｉ述せる従来技術の欠点を解
消し、引張強さが片状黒鉛鋳鉄より優れ、対数減衰率は
球状黒鉛系鋳鉄より大きく、シかも熱膨張係数がきわめ
て低い低熱膨張・高減衰能ＣＶ鋳鉄を提供するものであ
る。The object of the present invention is to eliminate the drawbacks of the prior art described in I) ii, have a tensile strength superior to flaky graphite cast iron, a logarithmic damping rate greater than spheroidal graphite cast iron, and a very low coefficient of thermal expansion. This provides CV cast iron with low thermal expansion and high damping capacity.
本発明の低熱膨張・高減衰能ＣＶＵ鉄は、最終化学組成
が１重量％でＣ１，４〜２．６％、ＳＬｏ。The low thermal expansion/high damping capacity CVU iron of the present invention has a final chemical composition of 1% by weight, C1.4-2.6%, and SLo.
８〜３．０％、Ｎｉ３０〜４０％＋ Ｍ ｎ （１−０
％。8-3.0%, Ni30-40%+M n (1-0
%.
Ｃｒ＜３．０％、Ｔｉ（１，０％となるような溶湯にＭ
ｇ及び／又はＲＥ元素を添加する事により、黒鉛の球状
化率が３０％〜７０％であることを特徴とするものであ
る。M is added to the molten metal such that Cr<3.0% and Ti (1.0%).
The graphite is characterized in that the spheroidization rate of graphite is 30% to 70% by adding g and/or RE elements.
次に本発明の低熱膨張・高減衰能ＣＶ鋳鉄の化学組成数
値限定理由について説明する。Next, the reason for limiting the numerical value of the chemical composition of the low thermal expansion/high damping capacity CV cast iron of the present invention will be explained.
Ｃ：１．４％未満では組織中の黒鉛量が著しく減少し、
このために減衰能が低下する。また鋳造性も悪くなる６
２．６％を超えると特に厚肉紡物においてキッシュ黒３
イ）が多量に晶出し、鋳造欠陥の発生による引張強さの
低下をもたらす。C: If it is less than 1.4%, the amount of graphite in the structure will decrease significantly,
This reduces the damping ability. Castability also deteriorates6.
If it exceeds 2.6%, quiche black 3 will occur, especially in thick-walled fabrics.
B) crystallizes in large quantities, resulting in a decrease in tensile strength due to the occurrence of casting defects.
Ｓｉ：０．８％未満では本来の黒鉛化促進機能が発揮さ
れず組織中の黒鉛量が著しく減少する。Si: If it is less than 0.8%, the original graphitization promoting function will not be exhibited and the amount of graphite in the structure will decrease significantly.
３．０％を超えると靭性が低下し硬度が上るたやに切削
性が低下する。また熱膨張係数も大きくなる。If it exceeds 3.0%, toughness decreases, hardness increases, and machinability decreases. The coefficient of thermal expansion also increases.
Ｎｉ：３０％未満では他の元素との関連もあるが、熱膨
張係数が９Ｘ１０−６以上となり低熱膨張の目的に反す
ることになる。また４０％を超えると熱膨張係数が高く
なってくると同時に製造原価も高くなる。Ni: If it is less than 30%, the coefficient of thermal expansion becomes 9X10-6 or more, which goes against the purpose of low thermal expansion, although there is a relationship with other elements. Moreover, if it exceeds 40%, the coefficient of thermal expansion becomes high and at the same time, the manufacturing cost also becomes high.
Ｍｎ：’Ｍｎは肪鉄溶湯を清浄にし、鋳造欠陥を防止す
るために必要な元素であるが、１％を超えると熱膨張係
数が９Ｘ１０”−’以上となり目的に合致しない。Mn: 'Mn is an element necessary to clean the molten fat iron and prevent casting defects, but if it exceeds 1%, the coefficient of thermal expansion becomes 9X10''-' or more, which does not meet the purpose.
Ｃｒ：Ｃｒは耐食性を向上するが３％を超えると黒鉛の
晶出が著しく困難になり、減衰能の低下とともに硬度が
上昇し切削性が低下する。Cr: Cr improves corrosion resistance, but if it exceeds 3%, it becomes extremely difficult to crystallize graphite, and the damping capacity decreases, hardness increases, and machinability decreases.
Ｔｉ：Ｔｉは黒鉛の形状を安定してＣｖ化するに有効な
元素であるが、１％を超えると黒鉛の晶出を阻害し減衰
能を低下させる。Ti: Ti is an effective element for stably converting the shape of graphite into Cv, but if it exceeds 1%, it inhibits crystallization of graphite and reduces the damping ability.
尚、最終化学組成がこのようになる溶湯をＭｇ及び／又
はＲＥを含む合金で処理して黒鉛形状が球状化率３０〜
７０％の材質を得るのであるが、球状化率が３０％未満
では引張り強さを常に２０ｋｇｆ ／ ｍｍ２以上に保
つことが困難であり、７０％を超えると対数減衰率を２
．０Ｘ１０−２以上に保つことが困難となる。In addition, by treating the molten metal with the final chemical composition as described above with an alloy containing Mg and/or RE, the graphite shape becomes spheroidized at a rate of 30 to 30.
However, if the spheroidization rate is less than 30%, it is difficult to maintain the tensile strength at 20 kgf/mm2 or more, and if it exceeds 70%, the logarithmic attenuation rate will be 2.
．． It becomes difficult to maintain the temperature at 0x10-2 or higher.
黒鉛の球状化率を３０〜７０％に制御するためのＭｇ及
び／又はＲＥの残留量は溶湯の熔解プロセス及び製品の
肉厚によって幅があるが大略の目安は肉厚が２５１１１
１１１以下ではＭｇ＋ＲＥ＝０．０１０−０．０３３ｗ
ｔ％、肉厚が５０＋ｎｍ以上になるとＭｇ＋ＲＥ＝０．
０１２〜０．０５５ｗｔ％である。The residual amount of Mg and/or RE to control the spheroidization rate of graphite to 30 to 70% varies depending on the melting process of the molten metal and the wall thickness of the product, but as a rough guide, the wall thickness is 25111.
Below 111, Mg+RE=0.010-0.033w
t%, and when the wall thickness is 50+nm or more, Mg+RE=0.
012 to 0.055 wt%.
以下本発明の実施例をさらに詳細に説明する。Examples of the present invention will be described in more detail below.
〔実施例、１〕
原料を高周波炉にて熔解し、Ｆｅ−ＳｉＦｅ−５ｉ−合
金にてＣＶ化焙処理俊、Ｆｅ−５ｉにて接種し肉厚２５
ｍｍのＹブロックを鋳造し試験に供した。[Example 1] Raw materials were melted in a high-frequency furnace, CV roasted with Fe-SiFe-5i alloy, and inoculated with Fe-5i to a thickness of 25 mm.
A Y block of mm was cast and tested.
本試料の黒鉛球状化率は６２％であった。The graphite spheroidization rate of this sample was 62%.
試料の分析結果は、鉄と不可避的不純物と第１表に示す
通りであった。The analysis results of the sample were as shown in Table 1, including iron and inevitable impurities.
第１表 （ｗｔ％）
第２表に熱膨張係数及び対数減衰率を、第３表に機械的
性質を示す。Table 1 (wt%) Table 2 shows the thermal expansion coefficient and logarithmic attenuation rate, and Table 3 shows the mechanical properties.
第２表 熱膨張係数の測定温度はＯ℃〜５０℃ 対数減衰率の測定温度は２０℃である。Table 2 Measurement temperature of thermal expansion coefficient is 0℃~50℃ The temperature at which the logarithmic decay rate was measured was 20°C.
第３表
〔実施例、２〕
ＥＣ料を高周波炉にて熔解し、Ｆｅ−８ｉＦｅ−８ｉ−
合金にてＣＶ化焙処理後、Ｆｅ−５ｉにて接種し肉厚７
５ｍｍのＹブロックを鋳造し試験に供した。Table 3 [Example 2] The EC material was melted in a high frequency furnace and Fe-8iFe-8i-
After CV heat treatment with alloy, inoculation with Fe-5i and wall thickness 7
A 5 mm Y block was cast and tested.
本試料の黒鉛球状化率は４８％であった。The graphite spheroidization rate of this sample was 48%.
試料の分析結果は、鉄と不可避的不純物と第４表に示す
通りであった。The analysis results of the sample were as shown in Table 4, including iron and inevitable impurities.
第４表 （ｗｔ％）
第５表に熱膨張係数及び対数減衰率を、第６表に機械的
性質を示す。Table 4 (wt%) Table 5 shows the thermal expansion coefficient and logarithmic attenuation rate, and Table 6 shows the mechanical properties.
第５表 熱膨張係数の測定温度は０℃〜５０℃ 対数減衰率の測定温度は２０℃である。Table 5 Measurement temperature of thermal expansion coefficient is 0℃~50℃ The temperature at which the logarithmic decay rate was measured was 20°C.
第６表
〔発明の効果〕
以上、製品肉厚の異なる２例のＣＶ！５鉄の例を挙げた
が、何れも熱膨張係数は従来の片状黒鉛系および球状黒
鉛系低熱膨張鋳鉄と同等以下であり引張り強さは何れも
２５ｋｇｆ／ｍｍ２以上と片状黒鉛鋳鉄系の引張り強さ
を大幅に越え、しかも対数減衰率は３．９〜４．４Ｘ１
０−”と球状黒鉛鋳鉄系の対数減衰率を大幅に越え片状
点２イ）鋳鉄系に近い値を示し所期の性質を得ることが
できた。Table 6 [Effects of the invention] Above are the CVs of two examples with different product wall thicknesses! The thermal expansion coefficients of all five irons are equal to or lower than those of conventional flaky graphite-based and spheroidal graphite-based low thermal expansion cast irons, and the tensile strength of both flaky graphite-based cast irons is 25 kgf/mm2 or higher, which is higher than that of flake graphite-based cast irons. Significantly exceeds the tensile strength and has a logarithmic decay rate of 3.9 to 4.4X1
0-'', which significantly exceeded the logarithmic attenuation rate of the spheroidal graphite cast iron system, and showed a value close to that of the cast iron system, indicating that the desired properties could be obtained.
Claims (1)
．８〜３．０％、Ｎｉ３０〜４０％、Ｍｎ＜１．０％、
Ｃｒ＜３．０％、Ｔｉ＜１．０％となるような溶湯にＭ
ｇ及び／又はＲＥ元素を添加する事により、黒鉛の球状
化率が３０％〜７０％であることを特徴とする低熱膨張
・高減衰能ＣＶ鋳鉄。The final chemical composition is C1.4-2.6% by weight, Si0
．． 8-3.0%, Ni30-40%, Mn<1.0%,
M is added to the molten metal such that Cr<3.0% and Ti<1.0%.
CV cast iron with low thermal expansion and high damping capacity, characterized in that the spheroidization rate of graphite is 30% to 70% by adding g and/or RE elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14459486A JPS63433A (en) | 1986-06-20 | 1986-06-20 | Low thermal expansion and high damping capacity cv cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14459486A JPS63433A (en) | 1986-06-20 | 1986-06-20 | Low thermal expansion and high damping capacity cv cast iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63433A true JPS63433A (en) | 1988-01-05 |
Family
ID=15365694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14459486A Pending JPS63433A (en) | 1986-06-20 | 1986-06-20 | Low thermal expansion and high damping capacity cv cast iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63433A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH081065U (en) * | 1991-04-03 | 1996-07-02 | 日立ツール株式会社 | Tool holder |
| US6110305A (en) * | 1992-12-15 | 2000-08-29 | Kabushiki Kaisha Toshiba | Method for production of high-strength low-expansion cast iron |
| JP2005298887A (en) * | 2004-04-09 | 2005-10-27 | Ito Tekko Kk | Low thermal expansion cast iron material |
| CN108179349A (en) * | 2018-01-04 | 2018-06-19 | 湖州中杭轧辊有限公司 | A kind of novel spheroidal graphite cast-iron deformed steel polishing roll and its production technology |
| CN109457172A (en) * | 2018-11-01 | 2019-03-12 | 苏州市海威特铸造厂 | A kind of low linear expansion coefficient casting and its casting technique |
-
1986
- 1986-06-20 JP JP14459486A patent/JPS63433A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH081065U (en) * | 1991-04-03 | 1996-07-02 | 日立ツール株式会社 | Tool holder |
| US6110305A (en) * | 1992-12-15 | 2000-08-29 | Kabushiki Kaisha Toshiba | Method for production of high-strength low-expansion cast iron |
| JP2005298887A (en) * | 2004-04-09 | 2005-10-27 | Ito Tekko Kk | Low thermal expansion cast iron material |
| JP4578847B2 (en) * | 2004-04-09 | 2010-11-10 | 伊藤鉄工株式会社 | Low thermal expansion cast iron |
| CN108179349A (en) * | 2018-01-04 | 2018-06-19 | 湖州中杭轧辊有限公司 | A kind of novel spheroidal graphite cast-iron deformed steel polishing roll and its production technology |
| CN109457172A (en) * | 2018-11-01 | 2019-03-12 | 苏州市海威特铸造厂 | A kind of low linear expansion coefficient casting and its casting technique |
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