JPH03146204A - Production of cast iron clad steel product having good vibration-damping property - Google Patents
Production of cast iron clad steel product having good vibration-damping propertyInfo
- Publication number
- JPH03146204A JPH03146204A JP28570389A JP28570389A JPH03146204A JP H03146204 A JPH03146204 A JP H03146204A JP 28570389 A JP28570389 A JP 28570389A JP 28570389 A JP28570389 A JP 28570389A JP H03146204 A JPH03146204 A JP H03146204A
- Authority
- JP
- Japan
- Prior art keywords
- cast iron
- steel
- vibration damping
- damping properties
- clad steel
- 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
- 239000010959 steel Substances 0.000 title claims abstract description 82
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 77
- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 71
- 238000013016 damping Methods 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000005096 rolling process Methods 0.000 claims abstract description 28
- 229910014458 Ca-Si Inorganic materials 0.000 claims abstract description 13
- 229910017082 Fe-Si Inorganic materials 0.000 claims abstract description 9
- 229910017133 Fe—Si Inorganic materials 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 abstract description 23
- 239000010439 graphite Substances 0.000 abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052742 iron Inorganic materials 0.000 abstract description 6
- 238000010030 laminating Methods 0.000 abstract description 4
- 238000005266 casting Methods 0.000 abstract description 3
- 150000002505 iron Chemical class 0.000 abstract 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000009467 reduction Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 238000005253 cladding Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 229910001208 Crucible steel Inorganic materials 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 229910001141 Ductile iron Inorganic materials 0.000 description 4
- 239000002304 perfume Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000011162 core material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/383—Cladded or coated products
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は振動・騒音を抑制する制振性に優れ、さらに溶
接性・成形加工性の良好な鋳鉄クラッド鋼材の製造方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for producing cast iron clad steel materials that have excellent vibration damping properties that suppress vibration and noise, and also have good weldability and formability.
［従来の技術］
近年、鉄鋼材料の高付加価値化が研究され、その一つと
して鋳鉄と鉄鋼材料を組み合わせた鋳鉄クラッド鋼材が
開発されている。[Background Art] In recent years, research has been carried out on increasing the added value of steel materials, and as one of these studies, cast iron clad steel materials, which are a combination of cast iron and steel materials, have been developed.
つまり、鋳鉄の特性である耐腐食性・制振性・耐摩耗性
等の性質と鉄鋼材料の特性である高強度・高靭性・溶接
性・良加工性といった性能のいくつかを合わせ持つ鋳鉄
クラッド鋼材が開発されている。In other words, cast iron cladding combines the characteristics of cast iron such as corrosion resistance, vibration damping, and wear resistance with the characteristics of steel materials such as high strength, high toughness, weldability, and good workability. Steel materials are being developed.
例えば、■特開昭６１−２４５９８５号公報に示されて
いるように鋼と鋳鉄のクラッドを９５０〜１１００℃の
温度に加熱し、８００℃以上で圧下を終了する強度・靭
性の良好なりラッド鋼の製造法、■特開昭６２−６９８
３号公報に示されているようにＣχ＋Ｓｉχ／３≧３゜
０χである鋳鉄を両側から鋼板で挾み、片側の鋼板の厚
さが全厚比で５χ以上であることを特徴とする振動減衰
特性の優れた複合Ｒ仮。■特開昭６３−２３０３３２号
公報に示されているように鋼板を芯材として少なくとも
その片面に鋳鉄板を接合させた耐食性、靭性に優れた鋳
鉄クラッド鋼板。■特開昭６２１６４５３１号公報に示
されているように球状黒鉛鋳鉄（ＪＩＳ Ｇ ５５０２
）を芯材として鋼材を表裏面の合わせ材とし、熱間にて
圧延圧着する制振性に優れた鋳鉄クラッド板。For example, as shown in Japanese Unexamined Patent Publication No. 61-245985, a clad steel made of steel and cast iron is heated to a temperature of 950 to 1100°C, and the rolling is completed at 800°C or higher to produce rad steel with good strength and toughness. Manufacturing method, JP-A-62-698
As shown in Publication No. 3, a vibration damping method characterized in that cast iron with Cχ+Siχ/3≧3°0χ is sandwiched between steel plates from both sides, and the thickness of the steel plate on one side is 5χ or more in terms of the total thickness ratio. Composite R temporary with excellent characteristics. (1) A cast iron clad steel plate with excellent corrosion resistance and toughness, which is made of a steel plate as a core material and has a cast iron plate bonded to at least one side thereof, as disclosed in JP-A No. 63-230332. ■As shown in Japanese Patent Application Laid-Open No. 62164531, spheroidal graphite cast iron (JIS G 5502
) is used as the core material, and steel is used as the front and back materials, and the cast iron clad plate has excellent vibration damping properties and is hot rolled and crimped.
等が開示されている。etc. are disclosed.
［発明が解決しようとする課題］
前記■の方法は強度・靭性の良好なりラッド鋼の製造方
法を目的とし、制振性の向上に必要な技術的な構成上の
配慮がなく、従って制振性を形成する作用・効果の記載
が見当たらない。[Problems to be Solved by the Invention] The method (2) above is aimed at producing a rad steel with good strength and toughness, and does not take into consideration the technical structure required to improve vibration damping performance. I can't find any description of the actions and effects that form sex.
また、前記■の複合鋼板は、普通鋳鉄と鋼材よりなるク
ラッドについては本文中に明記されているように圧下比
８．３の熱延板のみで、内柱値ロー１−０．８ Ｘｌ０
−’〜３ Ｘｌ０−”程度であり、普通鋼単体に比べ高
々１０程度度で片状黒鉛鋳鉄（ＪＩＳ Ｇ ５５０１）
単体の内柱値Ｑ−１≧１５Ｘ１０−’に比べてもかなり
制振性が劣っており実用性に乏しい。In addition, as stated in the text, the composite steel plate mentioned above is only a hot-rolled plate with a rolling reduction ratio of 8.3 as for the cladding made of ordinary cast iron and steel, and the inner column value low is 1-0.8
-' to 3
Even when compared to a single inner column value Q-1≧15X10-', the damping performance is considerably inferior and it is impractical.
前記■の鋳鉄クラッド鋼板は耐食性、靭性の優れたもの
であるが、制振性については■と同様に技術的な構成上
の配慮がなく、従って制振性を形成する作用・効果の記
載が見当たらない。The cast iron clad steel plate mentioned in (■) above has excellent corrosion resistance and toughness, but as with (■), there is no consideration given to the technical structure regarding vibration damping properties, and therefore, there is no description of the functions and effects that form vibration damping properties. Not found.
また、前記■の鋳鉄クラッドは球状黒鉛鋳鉄を芯材とす
るもので、該球状黒鉛鋳鉄より制振性の良好な片状黒鉛
鋳鉄（ｍ鋳鉄とも稠す））（例えば杉本孝−：鉄と鋼、
１４（１９７４）、ｐ、 １２７）と鋼材のクラッドに
ついては全く記載がない。In addition, the cast iron cladding described in (1) above has spheroidal graphite cast iron as its core material, and flake graphite cast iron (also known as m cast iron), which has better vibration damping properties than spheroidal graphite cast iron (for example, Takashi Sugimoto: Iron and steel,
14 (1974), p. 127) and there is no mention of steel cladding.
本発明は以上に説明した従来技術を背景とする実状から
、
■片状黒鉛鋳鉄と鋼材のクラッドによる制振性・溶接性
・成形加工性の良好な鋳鉄クラッド鋼材の製造方法の確
立。The present invention is based on the actual situation based on the prior art described above. 1) Establishment of a method for manufacturing cast iron clad steel materials with good vibration damping properties, weldability, and formability using flaky graphite cast iron and steel cladding.
■普通鋳鉄と普通鋼より成るクラッドの圧下比８．３の
熱延板における制振性の劣化（片状黒鉛鋳鉄と比べた場
合）の防止。■Prevention of deterioration of damping properties (when compared with flake graphite cast iron) in hot-rolled sheets with a cladding made of ordinary cast iron and ordinary steel with a rolling reduction ratio of 8.3.
■球状黒鉛鋳鉄使用に伴うコストアップの抑制等の問題
を解決した制振性の良好な鋳鉄クラッド鋼材の製造方法
の提供を課題とするものである。■The object of the present invention is to provide a method for producing cast iron clad steel materials with good vibration damping properties, which solves problems such as suppressing cost increases associated with the use of spheroidal graphite cast iron.
［課題を解決するための手段］
本発明は上記の課題を達成するために、■重量Ｚ テｃ
′ｚ＋１／３Ｓｉ！ ≧２．５ｚを満足する溶銑にＣａ
−Ｓｉ、及び又はＦｅ−５４を加えることによりグラフ
ァイトの周囲にフェライトを生成させること、■所要の
圧延条件で圧延を行うこと、
の相乗効果によって損失係数η≧０．０２を確保するこ
と、を基本的手段とし、具体的には、（１） Ｃχ＋
１／３Ｓｉχで規定される炭素当量が２．５χ以上の溶
銑に重量％でＣａ−Ｓｉ：０．１％〜２０！、Ｆｅ−Ｓ
ｉ：０．１〜２０Ｚの何れか一方を添加して鋳造凝固さ
せた鋳鉄を鋼材と積層して構成した複合鉄鋼片を９００
〜１１４０℃の温度に加熱し、仕上げ温度７５０℃以上
で圧延を終了することを特徴とする制振性の良好な鋳鉄
クラッド鋼材の製造方法を第１の手段とし、（２）
Ｃａ−５ｔ及びＦｅ−５ｔが不可避的不純物を含む第１
の手段に記載の制振性の良好な鋳鉄クラッド鋼材の製造
方法を第２の手段とし、
（３） ｌＪ＋１／３Ｓｉｔｔ’規定さレル炭素当量−
ｈ＜２．５’１以上の溶銑に重量％でＣａ−Ｓｉ：０．
１χ〜２０！、Ｆｅ−Ｓｉ：０．１〜２０Ｚの両方を添
加して鋳造凝固させた鋳鉄を鋼材と積層して構成した複
合鉄鋼片を９００〜１１４０℃の温度に加熱し、仕上げ
温度７５０℃以上で圧延を終了することを特徴とする制
振性の良好な鋳鉄クラッド鋼材の製造方法を第３の手段
とし、
（４） Ｃａ−５ｔ及びＦｅ−５ｔが不可避的不純物
を含む第３の手段に記載の制振性の良好な鋳鉄クラッド
鋼材の製造方法第４の手段とするものである。[Means for Solving the Problems] In order to achieve the above-mentioned problems, the present invention provides
'z+1/3Si! Ca in hot metal satisfying ≧2.5z
- Generating ferrite around graphite by adding Si and/or Fe-54, ■ Performing rolling under the required rolling conditions, and ensuring a loss coefficient η≧0.02 through the synergistic effect of The basic means, specifically, (1) Cχ+
Ca-Si: 0.1% to 20% by weight in hot metal having a carbon equivalent defined by 1/3Siχ of 2.5χ or more! , Fe-S
i: 900 pieces of composite iron and steel made by laminating cast iron that has been cast and solidified with the addition of either 0.1 to 20Z and steel material.
As a first means, a method for manufacturing cast iron clad steel material with good vibration damping properties, which is characterized by heating to a temperature of ~1140°C and finishing rolling at a finishing temperature of 750°C or higher, (2)
First, Ca-5t and Fe-5t contain unavoidable impurities.
The method for manufacturing cast iron clad steel materials with good vibration damping properties described in the above means is used as the second means, and (3) lJ + 1/3 Sitt' specified rel carbon equivalent -
Ca-Si:0.
1χ~20! , Fe-Si: A composite steel piece made by adding both 0.1 to 20Z and solidifying cast iron and laminating it with steel material is heated to a temperature of 900 to 1140°C and rolled at a finishing temperature of 750°C or higher. A third means is a method for manufacturing a cast iron clad steel material with good vibration damping properties, characterized in that: This is a fourth means of manufacturing a cast iron clad steel material with good vibration damping properties.
［作用］
上記手段を確立するに至った各作用について、本発明者
等の実験・検討で得た各知見を基に以下に詳細に説明す
る。[Effects] Each effect that led to the establishment of the above means will be explained in detail below based on the findings obtained through experiments and studies by the present inventors.
鋼材の成分は特定の必要はないが、鋳鉄の成形加工性、
溶接性、靭性等を補完するため、それ自体前記の各特性
の優れた鋼材を利用することが望ましく、また、耐食性
、美観等を得るためにステンレス鋼を使用することは本
発明の実施に支障がないことが判明した。The composition of the steel material does not need to be specific, but the formability of cast iron,
In order to complement weldability, toughness, etc., it is desirable to use a steel material that itself has excellent properties, and the use of stainless steel in order to obtain corrosion resistance, aesthetic appearance, etc. will hinder the implementation of the present invention. It turned out that there was no.
また、鋳鉄に高い制振性を分担させるため、鋳鉄の中で
最も制振性の高い片状黒鉛鋳鉄を使用する必要があり、
そのため、Ｃχ＋１／３Ｓｉχで規定される炭素当量が
２．５ｚ未満の溶銑はグラファイトの生成が十分でなく
良好な制振性を有する鋳鉄が得られないので、前記炭素
当量が２．５π以上の溶銑から鋳鉄を得る必要を見出し
た。In addition, in order to share high vibration damping properties with cast iron, it is necessary to use flake graphite cast iron, which has the highest vibration damping properties among cast irons.
Therefore, hot metal with a carbon equivalent defined by Cχ+1/3Siχ of less than 2.5z does not produce enough graphite and cannot produce cast iron with good vibration damping properties. found it necessary to obtain cast iron from
こうして得た片状黒鉛鋳鉄の圧延加工性を向上させるた
めにはＣａ−５ｔ 、 Ｆｅ−５ｔを溶銑段階で添加す
ると良く、その添加量はそれぞれ０．１π未満ではグラ
ファイトの周囲のフェライトの生成が不十分で圧延加工
性は改善されず、それぞれ２０！超ではグラファイトの
形状が不均一団塊状に偏析し、球状化、或いは凹状化し
、鋳鉄強度、加工性、制振性が劣化するため添加範囲を
それぞれ０．１〜２ｏｚとしなければならないことを見
出した。In order to improve the rolling workability of the flaky graphite cast iron obtained in this way, it is recommended to add Ca-5t and Fe-5t at the hot metal stage.If the amount of each addition is less than 0.1π, the formation of ferrite around the graphite will occur. Insufficient and rolling workability was not improved, each 20! It was discovered that in ultra-high-grade steel, the shape of graphite segregates into uneven nodules, becomes spheroidal, or concave, deteriorating cast iron strength, workability, and vibration damping properties, so the addition range must be set at 0.1 to 2 oz. Ta.
また複合鉄鋼片を作るには、例えば鋳込みを利用し、連
続鋳造スラブ内や鋼塊鋳型内で溶鉄を注入して鋳ぐるみ
を行う方法、鉄鋼片の段階で積層した後、周囲を溶接す
る方法、さらには爆着法、サブマージアーク溶接やエレ
クトロガス、エレクトロスラグ溶接等の溶接手段を用い
て帯状電極による肉盛方法等多くの方法が用いられるこ
とが判明した。Composite steel slabs can also be made by, for example, using casting, injecting molten iron into continuous casting slabs or steel ingot molds, or by laminating the steel slabs and then welding the surrounding areas. Furthermore, it has been found that many methods can be used, such as an overlay method using a strip electrode using a welding method such as an explosion bonding method, submerged arc welding, electrogas welding, or electroslag welding.
また、選択する鋼の化学成分と複合鉄鋼片の寸法、厚み
、厚み比を考慮して選択すれば、片状黒鉛鋳鉄と鋼材の
厚み比は圧延後、その比がそのまま保存されるので最終
製品の用途と目的に応じて予め両者の厚み比を決めてお
（必要があることが判明した。In addition, if the chemical composition of the steel to be selected and the dimensions, thickness, and thickness ratio of the composite steel piece are selected, the thickness ratio of flake graphite cast iron and steel will remain unchanged after rolling, resulting in the final product. It has been found that it is necessary to determine the thickness ratio of the two in advance depending on the use and purpose of the two.
本発明者等は以上の検討の結果、制振性、耐腐食性に優
れた片状黒鉛鋳鉄と靭性・溶接性・成形加工性に優れた
鋼材をその用途に応じて、表裏２層、あるいは鋳鉄・鋼
材のいずれかＩＮを中間層に配置した３層積層の鋳鉄ク
ラッド鋼材を適切な圧延条件で圧延することにより、制
振性、成形加工性の優れた鋳鉄クラッド鋼材が得られる
ことを見出した。As a result of the above studies, the present inventors have developed flaky graphite cast iron with excellent vibration damping properties and corrosion resistance, and steel with excellent toughness, weldability, and formability. We have discovered that by rolling a three-layer laminated cast iron clad steel material in which either cast iron or steel IN is placed in the middle layer under appropriate rolling conditions, a cast iron clad steel material with excellent vibration damping properties and formability can be obtained. Ta.
そこで本発明者等は、第１表に化学成分を示す片状黒鉛
鋳鉄Ａ（溶銑段階にＣａ−Ｓｉを３ｚ添加）と普通ｗ４
Ｂを用いてＡ−８２層（各１０＋＋ｕ＋＋、計２０ｍｍ
）、Ａ−Ｂ−Ａ及びＢ−Ａ−８の３層（各１ｉｍ１計３
０ｍ＋ｗ）の複合鉄鋼片を作成し、低コストで制振性が
高（、しかも溶接性・靭性の良好な鋳鉄クラッド鋼材の
製造条件を確立する実験、検討をさらに重ねた。Therefore, the present inventors developed flaky graphite cast iron A (3z Ca-Si was added at the hot metal stage) and ordinary w4 whose chemical components are shown in Table 1.
A-82 layers (each 10++u++, total 20mm
), 3 layers of A-B-A and B-A-8 (each 1im1, total 3 layers)
We created composite steel slabs of 0m+w) and conducted further experiments and studies to establish manufacturing conditions for cast iron clad steel materials that are low cost, have high vibration damping properties (and have good weldability and toughness).
その結果、該複合鋼片の加熱温度は、■片状黒鉛鋳鉄の
融点がほぼ１１５０℃であり、■片状黒鉛鋳鉄は９００
℃未満の加熱温度では変形抵抗が増大して圧延中に割れ
が発生しやすく、加熱温度を９００℃〜１１４０℃にす
る必要があることを見出した。As a result, the heating temperature of the composite steel slab is as follows: (1) The melting point of flaky graphite cast iron is approximately 1150°C; (2) The melting point of flaky graphite cast iron is approximately 900°C
It has been found that at heating temperatures below .degree. C., deformation resistance increases and cracks are likely to occur during rolling, and that the heating temperature must be 900.degree. C. to 1140.degree.
また仕上げ温度は７５０℃以上なければ、圧延温度の低
下に伴い割れが発生し、Ａｒ、点以下での圧延では靭性
の劣化が甚だしいことを知見した。It has also been found that unless the finishing temperature is 750° C. or higher, cracks will occur as the rolling temperature is lowered, and that rolling at temperatures below the Ar point will result in severe deterioration of toughness.
これ等の知見を基に、複合鋼片を１１００℃に加熱後種
々の圧下率で圧延を行った。Based on these findings, composite steel slabs were heated to 1100° C. and then rolled at various rolling reduction ratios.
結果を第１図、第２図に示す。The results are shown in Figures 1 and 2.
本発明者等はこれ等の図から全ての圧下率において、損
失係数η≧０．０２ （内耗率Ｑ−１≧０．０２）、ｖ
Ｅ０≧ｌＱｋｇｆ −＋ｇ（ｌｈｍフルサイズシャル
ピー試験片）と制振性、靭性共に良好な鋳鉄クランド鋼
材が得られる事を知得した。The present inventors have determined from these figures that at all rolling reductions, the loss coefficient η≧0.02 (internal wear rate Q-1≧0.02), v
It was learned that E0≧lQkgf −+g (lhm full-size Charpy test piece) and cast iron crund steel material with good vibration damping properties and toughness can be obtained.
また、溶銑にＣａ−Ｓｉを添加しなかった鋳鉄Ｃと損失
係数ηが０．００１の普通ｗ４Ｂとの３層の複合鉄鋼片
Ｂ−Ｃ−８は圧下率５０％以上の時に鋳鉄内のグラファ
イトと地鉄の界面が大きく剥離し、かつ地鉄に割れを生
じ、靭性、制振性共に劣ることが判明した。In addition, when the rolling reduction rate is 50% or more, the graphite in the cast iron is removed. It was found that the interface between the steel base and the steel base was severely peeled off, and the base steel was cracked, resulting in poor toughness and vibration damping properties.
尚、損失係数ηは材料に振動を励起させた後、自由減衰
させる際の１サイクル当たりの振動エネルギー減衰率を
２π（π：円周率）で割った値として定義され、内耗値
Ｑ−１と等しい値である。The loss coefficient η is defined as the value obtained by dividing the vibration energy attenuation rate per cycle by 2π (π: pi) when vibration is excited in the material and then allowed to freely decay, and is the internal wear value Q-1. The value is equal to .
また圧延後、靭性向上や強度上昇のために行う加速冷却
、及び焼串、焼鈍、焼入れ焼戻しなど、製品の使用用途
上の重要な機械的性質の安定と確保等のために行う圧延
後の熱処理、さらには積層作業前の鋳鉄の処理等は、共
に本発明の作用・効果の形成を助長こそすれ妨げること
がないので活用できることを見出した。In addition, after rolling, accelerated cooling is performed to improve toughness and strength, and post-rolling heat treatment is performed to stabilize and ensure important mechanical properties for the intended use of the product, such as skewering, annealing, quenching and tempering. Furthermore, it has been found that the treatment of cast iron before the lamination work can be utilized because it promotes the formation of the functions and effects of the present invention without hindering it.
第１表 （重量％）
（注）
■ ｆ４Ａは片状黒鉛鋳鉄（Ｃａ−Ｓｉ添加）■ ｆｉ
ＩＢは構造用鋼
■ 鋼Ｃは片状黒鉛鋳鉄（Ｃａ−Ｓｉ無添加）本発明は
上記した各知見を基に成されたものであって、これ等の
知見を得た口々により、本発明者等は、片状黒鉛鋳鉄を
用いて制振性に優れた鋳鉄クラッド鋼材を経済的に製造
する方法を確立して本発明の課題を達成したのである。Table 1 (Weight %) (Note) ■ f4A is flake graphite cast iron (Ca-Si addition) ■ fi
IB is structural steel Steel C is flake graphite cast iron (no Ca-Si added) The present invention was made based on the above-mentioned findings, and the present invention was The inventors have achieved the object of the present invention by establishing a method for economically manufacturing cast iron clad steel materials with excellent vibration damping properties using flaky graphite cast iron.
［実施例］
第２表に本発明例と比較例に用いた供試鋼の化学成分を
、第３表にそれぞれの鋼板の製造条件と得られた特性を
示す。[Example] Table 2 shows the chemical composition of the test steels used in the inventive examples and comparative examples, and Table 3 shows the manufacturing conditions of each steel plate and the properties obtained.
圧延後、数種のものについては加速冷却、加速冷却焼戻
し、再加熱焼入れ焼戻しを行った。After rolling, several types of specimens were subjected to accelerated cooling, accelerated cooling tempering, and reheating quenching and tempering.
表に明らかな如く、本発明例の調香１〜１８は制振性、
靭性の良好な鋳鉄クラッド鋼が得られた。As is clear from the table, perfumes 1 to 18 of the examples of the present invention have vibration damping properties,
A cast iron clad steel with good toughness was obtained.
これらの本発明例に対し、Ｃａ−Ｓｉ 、 Ｆｅ−Ｓｉ
の添加量が本発明の下限に満たない比較例の調香２４．
３６は圧下率５ｏｚ以上の時に鋳鉄内のグラファイトと
地鉄の界面が剥離し、かつ地鉄に割れを生じ、制振性、
靭性が共に劣化した。For these examples of the present invention, Ca-Si, Fe-Si
Comparative Example Perfume 24. in which the amount added is less than the lower limit of the present invention.
36, when the rolling reduction rate is 5 oz or more, the interface between the graphite in the cast iron and the base steel separates, and cracks occur in the base steel, resulting in poor vibration damping properties,
Toughness also deteriorated.
また、Ｃａ−Ｓｉ 、 Ｆｅ−Ｓｉの添加量が本発明の
上限を超える比較例の調香２３．２９．３３はグラファ
イトの形状が不均一団塊状に偏析し、球状化或いは凹状
化し、団塊状黒鉛鋳鉄になり、強度、加工性、制振性が
劣化した。In addition, in Comparative Example Perfume No. 23, 29, and 33, in which the amount of Ca-Si and Fe-Si added exceeds the upper limit of the present invention, the shape of graphite is segregated in a nonuniform nodule shape, and becomes spheroidal or concave. It became graphite cast iron, and its strength, workability, and vibration damping properties deteriorated.
仕上げ温度が本発明の範囲を満足していない比較例の調
香２０，２１，２６，２８，３１，３２．３５は鋳鉄に
割れが発生し、制振性、靭性が劣化した。In Comparative Examples 20, 21, 26, 28, 31, 32.35 whose finishing temperature did not satisfy the range of the present invention, cracks occurred in the cast iron, and vibration damping properties and toughness deteriorated.
加熱温度が本発明の上限を超えている比較例の調香１９
．２５．３０は、鋳鉄が溶融し２枚板となり健全なりラ
ッド調材が得られなかった。Comparative example fragrance 19 where the heating temperature exceeds the upper limit of the present invention
．． In the case of 25.30, the cast iron melted and became two plates, making it impossible to obtain a sound and rad prepared material.
また、加熱温度が本発明の下限を下回る比較例の調香２
２，２７．３４は、鋳鉄に割れが発生し、制振性と靭性
が共に劣った。In addition, Comparative Example Perfume 2 where the heating temperature is below the lower limit of the present invention.
In No. 2, 27.34, cracks occurred in the cast iron, and both vibration damping properties and toughness were poor.
［発明の効果］
上記の如く本発明によると、片状黒鉛鋳鉄と普通鋼又は
特殊鋼よりなる制振性に優れ、しかも靭性、溶接性に優
れた鋳鉄クラッド鋼材をコスト低く、生産性良く製造で
き、広く提供が可能となるので、静粛な生活環境の構築
に携わる産業分野にもたらす効果は極めて大きい。[Effects of the Invention] As described above, according to the present invention, a cast iron clad steel material made of flake graphite cast iron and ordinary steel or special steel and having excellent vibration damping properties, as well as excellent toughness and weldability, can be manufactured at low cost and with high productivity. This will have an extremely large effect on industrial fields involved in creating a quiet living environment.
第１図は本発明の鋳鉄クランド鋼板の制振性と圧下率の
関係を示した図であり、第２図は本発明の鋳鉄クラッド
鋼板の靭性と圧下率の関係を示した図である。FIG. 1 is a diagram showing the relationship between vibration damping properties and rolling reduction of the cast iron clad steel sheet of the present invention, and FIG. 2 is a diagram showing the relationship between the toughness and rolling reduction of the cast iron clad steel sheet of the present invention.
Claims (4)
５％以上の溶銑に重量％でＣａ−Ｓｉ：０．１％〜２０
％、Ｆｅ−Ｓｉ：０．１〜２０％の何れか一方を添加し
て鋳造凝固させた鋳鉄を鋼材と積層して構成した複合鉄
鋼片を９００〜１１４０℃の温度に加熱し、仕上げ温度
７５０℃以上で圧延を終了することを特徴とする制振性
の良好な鋳鉄クラッド鋼材の製造方法。(1) Carbon equivalent defined as C%+1/3Si% is 2.
Ca-Si: 0.1% to 20% by weight in hot metal of 5% or more
%, Fe-Si: A composite steel piece made by adding either 0.1 to 20% of cast iron and solidifying it to a steel material is heated to a temperature of 900 to 1140°C, and the finishing temperature is 750°C. A method for producing a cast iron clad steel material with good vibration damping properties, characterized in that rolling is completed at a temperature of ℃ or above.
む特許請求の範囲第１項に記載の制振性の良好な鋳鉄ク
ラッド鋼材の製造方法。(2) The method for producing a cast iron clad steel material with good vibration damping properties as set forth in claim 1, in which Ca-Si and Fe-Si contain unavoidable impurities.
５％以上の溶銑に重量％でＣａ−Ｓｉ：０．１％〜２０
％、Ｆｅ−Ｓｉ：０．１〜２０％の両方を添加して鋳造
凝固させた鋳鉄を鋼材と積層して構成した複合鉄鋼片を
９００〜１１４０℃の温度に加熱し、仕上げ温度７５０
℃以上で圧延を終了することを特徴とする制振性の良好
な鋳鉄クラッド鋼材の製造方法。(3) Carbon equivalent defined as C%+1/3Si% is 2.
Ca-Si: 0.1% to 20% by weight in hot metal of 5% or more
%, Fe-Si: 0.1 to 20%, and solidified cast iron is laminated with steel to a temperature of 900 to 1140°C, and the finishing temperature is 750°C.
A method for producing a cast iron clad steel material with good vibration damping properties, characterized in that rolling is completed at a temperature of ℃ or above.
む特許請求の範囲第３項に記載の制振性の良好な鋳鉄ク
ラッド鋼材の製造方法。(4) The method for manufacturing a cast iron clad steel material with good vibration damping properties according to claim 3, wherein Ca-Si and Fe-Si contain inevitable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28570389A JPH03146204A (en) | 1989-10-31 | 1989-10-31 | Production of cast iron clad steel product having good vibration-damping property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28570389A JPH03146204A (en) | 1989-10-31 | 1989-10-31 | Production of cast iron clad steel product having good vibration-damping property |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03146204A true JPH03146204A (en) | 1991-06-21 |
Family
ID=17694933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28570389A Pending JPH03146204A (en) | 1989-10-31 | 1989-10-31 | Production of cast iron clad steel product having good vibration-damping property |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03146204A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7241590B2 (en) | 2000-09-29 | 2007-07-10 | Bristol-Myers Squibb Company | Identification and cloning of a full-length human Clnk-related gene, MIST (mast cell immunoreceptor signal transducer) |
| JP2017020095A (en) * | 2015-07-15 | 2017-01-26 | 株式会社木村鋳造所 | Hypereutectic flake graphite cast iron article and manufacturing method therefor |
-
1989
- 1989-10-31 JP JP28570389A patent/JPH03146204A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7241590B2 (en) | 2000-09-29 | 2007-07-10 | Bristol-Myers Squibb Company | Identification and cloning of a full-length human Clnk-related gene, MIST (mast cell immunoreceptor signal transducer) |
| US7442770B2 (en) | 2000-09-29 | 2008-10-28 | Bristol-Myers Squibb Company | Human clnk-related polypeptide, MIST (Mast Cell Immunoreceptor Signal Transducer) |
| US7667003B2 (en) | 2000-09-29 | 2010-02-23 | Bristol-Myers Squibb Company | Antibody directed to human mist (mast cell immunoreceptor signal transducer) |
| JP2017020095A (en) * | 2015-07-15 | 2017-01-26 | 株式会社木村鋳造所 | Hypereutectic flake graphite cast iron article and manufacturing method therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4227010B2 (en) | High strength steel for cold forming and steel strip or steel plate, method for manufacturing steel strip and method for manufacturing steel | |
| CN108486492B (en) | 1200 MPa-grade high-strength high-plasticity low-density steel plate and manufacturing method thereof | |
| JP2001220641A (en) | High strength thin steel sheet and high strength gavlanized thin steel sheet excellent in ductility and low in yield ratio and producing method therefor | |
| JPH083679A (en) | Hot rolled high strength steel plate excellent in formability and fatigue characteristic and having thermal softening resistance and its production | |
| JPH0524980B2 (en) | ||
| WO2003087414A1 (en) | High tensile steel excellent in high temperature strength and method for production thereof | |
| WO1982001566A1 (en) | Thin steel plate for draw working excellent in bake-hardening properties and process for manufacturing same | |
| JPH03133630A (en) | Clad steel sheet having good formability excellent in dent resistance and surface strain resistance | |
| JPH03146204A (en) | Production of cast iron clad steel product having good vibration-damping property | |
| KR102245227B1 (en) | Clad steel sheet having excellent strength, formability and galvanizability, and method for manufacturing thereof | |
| JP7459251B2 (en) | Multilayer rolled composite plate and its manufacturing method | |
| JP2828303B2 (en) | Manufacturing method of tough steel plate | |
| JP2022514915A (en) | Gradient steel material with high plastic surface layer and high strength inner layer and its manufacturing method | |
| JPS61194112A (en) | Manufacture of hot rolled steel sheet having superior adhesion to scale | |
| JP3348365B2 (en) | Hot-rolled high-strength steel sheet for processing having excellent heat-softening property and excellent fatigue properties, and method for producing the same | |
| JP2662198B2 (en) | Manufacturing method of cast steel with excellent fire resistance, strength and toughness | |
| JPH03146203A (en) | Production of cast iron clad steel product having excellent vibration-damping property | |
| JPH03240918A (en) | Production of wide flange shape excellent in refractoriness and reduced in yield ratio | |
| JPH03219014A (en) | Production of cast iron clad steel excellent in damping characteristic | |
| JPH03215625A (en) | Production of superplastic duplex stainless steel and hot working method therefor | |
| JP4626394B2 (en) | Manufacturing method of thick steel plate with excellent low temperature toughness | |
| JPH03229824A (en) | Production of soft-magnetic fe-al alloy sheet excellent in magnetic property | |
| JP3232118B2 (en) | Hot-rolled steel strip for construction with excellent fire resistance and toughness and method for producing the same | |
| JPH0711461A (en) | Alloy laminated type plated high damping steel plate excellent in workability and corrosion resistance | |
| JPS624450B2 (en) |