JP3034590B2 - Manufacturing method of damping steel sheet with excellent workability - Google Patents
Manufacturing method of damping steel sheet with excellent workabilityInfo
- Publication number
- JP3034590B2 JP3034590B2 JP2307913A JP30791390A JP3034590B2 JP 3034590 B2 JP3034590 B2 JP 3034590B2 JP 2307913 A JP2307913 A JP 2307913A JP 30791390 A JP30791390 A JP 30791390A JP 3034590 B2 JP3034590 B2 JP 3034590B2
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- JP
- Japan
- Prior art keywords
- steel sheet
- grain boundary
- oxide layer
- plating
- boundary oxide
- 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.)
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- Heat Treatment Of Sheet Steel (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、制振鋼板の製造法に関し、特に粒界酸化が
進行する雰囲気に調整された条件下で行う焼鈍処理時の
結晶粒の粗粒化を防止し、通常の薄鋼板製造ラインとほ
ぼ同等の製造ラインで、肌荒れがなく、加工性に優れた
制振鋼板を安価に製造するための新規な改良に関する。Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a vibration-damping steel sheet, and more particularly, to a method for producing coarse-grained steel during annealing treatment performed under conditions adjusted to an atmosphere in which grain boundary oxidation proceeds. The present invention relates to a novel improvement for manufacturing a vibration-damping steel sheet which prevents graining, is almost equivalent to a normal thin steel sheet manufacturing line, has no surface roughness, and is excellent in workability at a low cost.
（従来の技術とその問題点） 従来、各種の機械要素や構造体に制振材料を使用する
ことにより、振動と騒音を抑制する方法が採用されてお
り、これらの制振材料に用いられる金属材料としては、
例えば、Mn−Cu合金、高Cr鋼、黒鉛鋳鉄、および、その
他粘弾性物質とのクラッドまたはサンドイッチなどが一
般に周知となっている。(Conventional technology and its problems) Conventionally, a method of suppressing vibration and noise has been adopted by using a vibration damping material for various mechanical elements and structures, and a metal used for these vibration damping materials has been employed. As a material,
For example, cladding or sandwiching with Mn-Cu alloy, high Cr steel, graphite cast iron, and other viscoelastic materials is generally known.
前述の金属材料は、いずれもそれなりの特徴を有して
いるが、一般的な材料でなく、特殊な材料であり、その
製造は困難を極め、極めて高価なものである。Each of the above-mentioned metal materials has a certain characteristic, but is not a general material but a special material, and its manufacture is extremely difficult and extremely expensive.
そこで、本発明者らは、前述のような合金組成の改良
や材料複合の面から制振性を求めるのではなく、特開平
２−34720号公報に開示されているように、焼鈍処理後
の粒界酸化現象を利用し、結晶粒界に網目状の酸化物を
生成させ、その後にローラーレベリングなどの冷間加工
を施した制振鋼板の製造法を開発している。Therefore, the present inventors do not seek vibration damping properties from the viewpoint of improving the alloy composition and material composite as described above, but as disclosed in JP-A-2-34720, after the annealing treatment. Utilizing the grain boundary oxidation phenomenon, we are developing a method of producing vibration-damping steel sheets by generating a network-like oxide at the crystal grain boundaries and then performing cold working such as roller leveling.
すなわち、薄鋼板に粒界酸化が進行する雰囲気に調整
された条件下で、焼鈍処理することにより、鋼材の表面
部に粒界酸化層を形成させ冷間加工を施すようにした方
法で、その表面部に形成された粒界酸化層がこの冷間加
工によってさらにミクロクラックを起こすことにより制
振効果が増大するものと考えられている。That is, by performing annealing under a condition adjusted to an atmosphere in which grain boundary oxidation progresses in a thin steel sheet, a method of forming a grain boundary oxide layer on the surface of the steel material and performing cold working, It is considered that the grain boundary oxide layer formed on the surface portion is further micro-cracked by the cold working, thereby increasing the vibration damping effect.
（発明が解決しようとする課題） 上記の制振鋼板の製造法は、次のような課題を有して
いた。すなわち、鋼板の表面部に粒界酸化層を形成させ
る焼鈍処理時に結晶粒が粗大化し、加工性が劣化すると
ともに加工後の表面性状も劣化していた。(Problems to be Solved by the Invention) The above-described method for manufacturing a vibration-damping steel plate has the following problems. That is, the crystal grains became coarse during the annealing treatment for forming a grain boundary oxide layer on the surface of the steel sheet, and the workability was deteriorated and the surface properties after the work were also deteriorated.
また、制振鋼板の耐食性およびもしくは美麗さが要求
される用途にはめっき処理が施されるが、この場合に
は、結晶粒の粗大化の影響によって、めっき処理後の表
面性状が劣るという欠点を有していた。In addition, plating is applied to applications where corrosion resistance and / or beauty of the damping steel sheet is required, but in this case, the surface properties after plating are inferior due to the effect of coarsening of crystal grains. Had.
本発明は、以上のような課題を解決するためになされ
たもので、特に、鋼板の表面部に粒界酸化層を形成させ
る焼鈍処理時の結晶粒の粗大化を防止することによっ
て、加工性に優れた制振鋼板の製造法を提供することを
目的とするものである。The present invention has been made in order to solve the above-mentioned problems, and in particular, by preventing the crystal grains from becoming coarse during the annealing treatment for forming a grain boundary oxide layer on the surface of the steel sheet, the workability is improved. It is an object of the present invention to provide a method for producing a vibration-damping steel sheet excellent in quality.
（課題を解決するための手段） 本発明者らは、鋼板の表面部に粒界酸化層を形成させ
る焼鈍処理時の結晶粒の粗大化防止を種々検討した結
果、Al、Ｎの含有量を限定することと、さらに、Nb,Ti
の添加が有効であることを見出した。(Means for Solving the Problems) As a result of various studies on the prevention of coarsening of crystal grains during annealing treatment for forming a grain boundary oxide layer on the surface of a steel sheet, the present inventors found that the content of Al and N was reduced. Limiting, and Nb, Ti
Was found to be effective.
（発明の構成） 本発明は、重量％で、C:≦0.25％、Si:0.05〜1.5％、
Mn:0.05〜2.5％、Al:0.003〜0.075％、N:0.003〜0.012
％を含有し、残部がFeおよび不可避的不純物からなる鋼
の薄板を、粒界酸化が進行する条件に調整された雰囲気
下で、焼鈍処理することにより、前記鋼板の表面部に粒
界酸化層を形成させ、さらに冷間加工を施して粒界酸化
層にミクロクラックを発生させることからなる加工性の
優れた制振鋼板の製造法を提供する。(Structure of the Invention) The present invention provides, in weight%, C: ≤ 0.25%, Si: 0.05 to 1.5%,
Mn: 0.05-2.5%, Al: 0.003-0.075%, N: 0.003-0.012
%, And the balance of the steel sheet consisting of Fe and unavoidable impurities is subjected to an annealing treatment in an atmosphere adjusted to conditions under which grain boundary oxidation proceeds, so that a grain boundary oxide layer is formed on the surface of the steel sheet. Forming a micro-crack in a grain boundary oxide layer by cold working to provide a method for producing a damped steel sheet having excellent workability.
本発明はまた重量％で、C:≦0.25％、Si:0.05〜1.5
％、Mn:0.05〜2.5％、Al:0.003〜0.075％、N:0.003〜0.
012％を含有し、さらにNb:0.01〜0.20％、Ti:0.01〜0.2
0％のうち１種または２種を含有し、残部がFeおよび不
可避不純物からなる鋼の薄板を、粒界酸化が進行する条
件に調整された雰囲気下で焼鈍処理することにより前記
鋼板の表面部に粒界酸化層を形成させ、さらに冷間加工
を施して粒界酸化層にミクロクラックを発生させること
からなる加工性の優れた制振鋼板の製造法を提供する。The present invention also provides, by weight%, C: ≦ 0.25%, Si: 0.05-1.5%.
%, Mn: 0.05 to 2.5%, Al: 0.003 to 0.075%, N: 0.003 to 0.
012%, Nb: 0.01-0.20%, Ti: 0.01-0.2
A steel sheet containing one or two of 0% and the balance consisting of Fe and unavoidable impurities is subjected to an annealing treatment in an atmosphere adjusted to conditions under which grain boundary oxidation proceeds, whereby a surface portion of the steel sheet is produced. The present invention provides a method for producing a vibration-damping steel sheet having excellent workability, which comprises forming a grain boundary oxide layer on a steel sheet and further performing cold working to generate microcracks in the grain boundary oxide layer.
本発明はまた前記のいずれかの鋼の薄板を、粒界酸化
が進行する条件に調整された雰囲気下で焼鈍処理するこ
とにより前記鋼板の表面部に粒界酸化層を形成させ、さ
らに冷間加工を施して粒界酸化層にミクロクラックを発
生させ、その後に、めっきを施すことからなる加工性に
優れた制振鋼板の製造法を提供する。The present invention also comprises forming a grain boundary oxide layer on the surface of the steel sheet by annealing the thin sheet of any one of the above-mentioned steels in an atmosphere adjusted to conditions under which grain boundary oxidation proceeds, Provided is a method for producing a vibration-damping steel sheet having excellent workability, which comprises processing to generate microcracks in a grain boundary oxide layer, and thereafter performing plating.
本発明はまた前記のいずれかの鋼の薄板を、粒界酸化
が進行する条件に調整された雰囲気下で焼鈍処理するこ
とにより前記鋼板の表面部に粒界酸化層を形成させ、さ
らにめっきを施し、その後に冷間加工を施して粒界酸化
層にミクロクラックを発生させることからなる加工性に
優れた制振鋼板の製造法を提供する。The present invention also forms a grain boundary oxide layer on the surface of the steel sheet by annealing a thin sheet of any of the above steels in an atmosphere adjusted to conditions under which grain boundary oxidation proceeds, and further plating. The present invention provides a method for producing a vibration-damping steel sheet having excellent workability, which comprises performing micro-cracking in a grain boundary oxide layer by performing cold working after that.
本発明は、炭素鋼のAl量とＮ量を制限し、さらにTi,N
bの添加により、粒界酸化が進行する条件に調整された
雰囲気下での焼鈍処理することにより結晶粒が細粒であ
り、加工性に優れ、表面性状の良好な制振鋼板を製造す
るものである。The present invention limits the amount of Al and N in carbon steel,
By the addition of b, to produce a vibration-damping steel sheet with fine crystal grains, excellent workability, and good surface properties by performing annealing treatment in an atmosphere adjusted to conditions under which grain boundary oxidation proceeds It is.
つぎに、本発明方法で使用される鋼の成分元素とその
添加量について説明する。Next, the constituent elements of the steel used in the method of the present invention and the amount of addition thereof will be described.
Ｃは粒界酸化が進行する条件に調整された雰囲気下で
の焼鈍処理によって脱炭されるので特に限定する必要は
ないが、Ｃ量が多すぎると熱間圧延、冷延圧延における
製造性が悪くなるのでおよそ0.25％が上限になる。C is decarburized by annealing treatment in an atmosphere adjusted to conditions under which grain boundary oxidation proceeds, so there is no particular limitation. However, if the amount of C is too large, the productivity in hot rolling and cold rolling decreases. As it gets worse, the upper limit is about 0.25%.
Siは脱酸剤として鋼に含まれ、強度を向上させるに有
効な元素であり、また、酸素と結合して粒界酸化層を生
成させるに有効な元素で、粒界酸化層を生成させるため
の下限はおよそ0.05％である。およそ1.5％を超えると
粒界酸化層を生成させる効果が飽和するとともに加工性
が劣化するため、その上限を1.5％とした。Si is contained in steel as a deoxidizing agent and is an element that is effective for improving the strength.It is also an element that is effective for forming a grain boundary oxide layer by combining with oxygen. Is approximately 0.05%. If it exceeds about 1.5%, the effect of forming the grain boundary oxide layer is saturated and the workability is deteriorated. Therefore, the upper limit is set to 1.5%.
Mnは脱酸剤として、また、不純物であるＳをMnSとし
て固定し、熱間脆化を防ぎ、また、酸素と結合して粒界
酸化層を生成させるに有効な元素である。このための下
限はおよそ0.05％である。一方、およそ2.5％を超える
と粒界酸化層を生成させる効果が飽和するとともに加工
性が劣化するため、その上限を2.5％とした。Mn is an element that is effective as a deoxidizing agent, and fixes S as an impurity as MnS, prevents hot embrittlement, and combines with oxygen to form a grain boundary oxide layer. The lower limit for this is approximately 0.05%. On the other hand, if it exceeds about 2.5%, the effect of forming the grain boundary oxide layer is saturated and the workability is deteriorated. Therefore, the upper limit is made 2.5%.
AlはＮをAlNとして固定するに有効な元素である。AlN
が少ないと粒界酸化が進行する雰囲気に調整された条件
下の焼鈍処理時に結晶粒が粗大化する。結晶粒を粗大化
させないためのAl量の下限はおよそ0.003％である。Al
量が多くなると鋼の清浄度が悪く、また表面疵も発生
し、さらにAlNが大きくなり、結晶粒の粗大化を防止す
る効果がなくなる。このため上限は約0.075％である。Al is an element effective for fixing N as AlN. AlN
If the content is small, the crystal grains become coarse during the annealing treatment under the condition adjusted to the atmosphere in which the grain boundary oxidation proceeds. The lower limit of the amount of Al for preventing the crystal grains from being coarse is about 0.003%. Al
If the amount is large, the cleanliness of the steel is poor, surface flaws are generated, AlN is further increased, and the effect of preventing the crystal grains from becoming coarse is lost. Therefore, the upper limit is about 0.075%.
ＮはAlNとして析出し、結晶粒を粗大化させないため
のＮ量の下限は約0.003％である。一方、Ｎ量が多くな
ると、加工性が劣化し、その上限は約0.012％である。N precipitates as AlN, and the lower limit of the amount of N for preventing the crystal grains from being coarse is about 0.003%. On the other hand, when the amount of N increases, workability deteriorates, and the upper limit is about 0.012%.
本発明方法で使用される鋼の基本組成は以上の通りで
あり、目的を十分達成するが、さらにNb,Tiを選択的に
添加すると、さらに、結晶粒の粗大化防止について好ま
しい結果が得られる。Nb,Tiは微細な炭窒化物を形成
し、結晶粒の粗大化防止に有効な元素であり、この効果
を得るためには、いずれでも最低約0.01％以上必要であ
り、その効果は約0.2％で飽和するので、下限を0.010
％、上限を0.2％とした。The basic composition of the steel used in the method of the present invention is as described above, and the object is sufficiently achieved.However, when Nb and Ti are further selectively added, a favorable result can be obtained with respect to prevention of coarsening of crystal grains. . Nb and Ti are elements that form fine carbonitrides and are effective in preventing coarsening of crystal grains. In order to obtain this effect, at least about 0.01% or more is required, and the effect is about 0.2% or more. %, So the lower limit is 0.010
% And the upper limit was 0.2%.
本発明の方法において、ミクロクラックを発生させる
ための冷間圧延はローラーレベラーラインに通板するの
が好適であるが、それに限定されるものではない。な
お、表面性状を整えるためにスキンパス圧延を適段階に
挿入することは当業者の常識である。In the method of the present invention, the cold rolling for generating microcracks is preferably performed through a roller leveler line, but is not limited thereto. In addition, it is common knowledge of those skilled in the art to insert skin pass rolling at an appropriate stage in order to adjust the surface properties.
めっきは通常、亜鉛めっきまたはアルミニウムめっき
である。亜鉛めっきは溶融めっきまたは電気めっきであ
るが、通常は溶融めっきである。亜鉛めっきの場合には
多くの場合に鉄の電気めっきの前処理が行なわれる。こ
の前処理は亜鉛めっきの直前に行なってもよいが、この
電気鉄めっきの間に冷間加工を挟んでもよい。本発明の
対象である鋼板にNi等の高価な金属のめっきを行うこと
は事実上ないであろうが、めっき金属は鉄より貴な金属
であっても構わない。めっき厚は10〜150g/m2程度であ
る。The plating is usually zinc plating or aluminum plating. Zinc plating is hot-dip or electroplating, but is usually hot-dip. In the case of zinc plating, a pretreatment of electroplating of iron is often performed. This pretreatment may be performed immediately before the galvanizing, or a cold working may be interposed between the electric iron plating. It will be practically impossible to plate an expensive metal such as Ni on the steel sheet that is the subject of the present invention, but the plated metal may be a metal noble than iron. The plating thickness is about 10 to 150 g / m 2 .
（発明の具体的開示） 以下発明を実施例および比較例によって具体的に説明
するが、本発明は、これらの実施例によって限定される
ものではない。(Specific Disclosure of the Invention) Hereinafter, the present invention will be described specifically with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.
実施例１および比較例 第１表に示す化学組成の鋼を通常の方法で熱間圧延し
て板厚3.5mmの熱延板とし、さらに冷間圧延により板厚
0.8mmの冷延板とした。その後、露点50℃、焼鈍条件800
℃×20hのオープンコイル焼鈍を行ない板厚両面から各
々約55μｍの粒界酸化層を生じさせた。次にこれらの焼
鈍板に伸び率１％の冷間圧延を施し、その後ロール径29
mmのロールレベラーに通板した。Example 1 and Comparative Example Steel having the chemical composition shown in Table 1 was hot-rolled by a usual method to obtain a hot-rolled sheet having a thickness of 3.5 mm, and further, was subjected to cold-rolling.
0.8 mm cold rolled sheet was used. After that, dew point 50 ℃, annealing condition 800
Open coil annealing at 20 ° C. × 20 h was performed to form grain boundary oxide layers of about 55 μm on both sides of the sheet thickness. Next, these annealed sheets were subjected to cold rolling at an elongation of 1%, and then roll diameter 29%.
It passed through a roll leveler of mm.
これらの鋼板より幅16mm、長さ220mmの試片を切り出
し、片振り曲げ振動法により損失係数（η）を測定し
た。引張試験はJIS Z2201の５号試験片により行なっ
た。またJIS Z2247のエリクセン試験およびJIS Z2249の
コニカルカップ試験により加工性の試験を行なった。そ
の結果を第２表に示す。Specimens having a width of 16 mm and a length of 220 mm were cut out from these steel sheets, and the loss coefficient (η) was measured by a pulsating vibration method. The tensile test was performed using a No. 5 test piece of JIS Z2201. Further, a workability test was performed by an Erichsen test of JIS Z2247 and a conical cup test of JIS Z2249. Table 2 shows the results.
第２表から明らかなように、No.1,No.5,No.6の試料を
用いた比較例においては損失係数（η）は良好である
が、結晶粒が粗大化するため強度（T.S.），全伸び（Ｔ
−EL），エリクセン値（Er値）およびコニカルカップ値
（C.C.V.）が低く加工性に劣ることがわかった。またエ
リクセン試験後の加工部において肌荒れが著しい。As is clear from Table 2, in the comparative examples using the samples No. 1, No. 5, and No. 6, the loss coefficient (η) is good, but the strength (TS ), Total elongation (T
-EL), Erichsen value (Er value), and conical cup value (CCV) were low, indicating poor processability. In addition, skin roughness is remarkable in the processed portion after the Erichsen test.
一方、No.2〜4,No.7〜12の試料を用いた本発明例にお
いては損失係数（η）は良好であり、さらに強度、伸
び、Er値およびC.C.V.が良好な値を示し、エリクセン試
験後の加工部に肌荒れが認められない。On the other hand, in the examples of the present invention using the samples Nos. 2 to 4 and Nos. 7 to 12, the loss coefficient (η) is good, and the strength, elongation, Er value and CCV show good values. No rough skin is observed in the processed part after the test.
第１表のNo.1〜６の化学組成の冷延材を露点50℃、焼
鈍温度800℃で焼鈍時間を変化させたオープンコイル焼
鈍後の金属組織を観察した。The microstructures of the cold rolled materials having the chemical compositions of Nos. 1 to 6 in Table 1 after open coil annealing in which the dew point was 50 ° C. and the annealing temperature was 800 ° C. and the annealing time was changed were observed.
その結果を第１図に示す。第１図から明らかなように
比較鋼のAl含有量が低いNo.1、Ｎ含有量が低いNo.5およ
びAl含有量が高いNo.6においてはフェライト結晶粒が著
しく粗大化することが判る。一方、No.2〜No.4の試料を
使用する本発明例においてはフェライト結晶粒の粗大化
が生じないことが判る。なお結晶粒の粗大度はJIS G055
2による５番以下とした。The result is shown in FIG. As is clear from FIG. 1, ferrite crystal grains are significantly coarsened in No. 1 having a low Al content, No. 5 having a low N content and No. 6 having a high Al content in the comparative steel. . On the other hand, in the examples of the present invention using the samples No. 2 to No. 4, it is found that the ferrite crystal grains do not become coarse. The coarseness of crystal grains is JIS G055
Number 5 or less according to 2.
実施例２ 実施例１の操作で得られたNo.1とNo.3のオープンコイ
ル焼鈍材を用い電気メッキラインで付着量3g/m2の鉄め
っきを施した後に、溶融Znめっき設備により目付量;45g
/m2の溶融Znめっき鋼板を得た。その後伸び率１％のス
キンパス圧延を施した後、粒界酸化層にクラックを付与
するためにロール径29mmのロールレベラーラインに通板
した。引張試験、加工性および損失係数（η）の測定は
上記と同様な方法で行なった。第３表にその結果を示
す。Example 2 Using the No. 1 and No. 3 open coil annealed materials obtained in the operation of Example 1 and applying iron plating with an adhesion amount of 3 g / m 2 on an electroplating line, the basis weight was applied by a hot-dip Zn plating facility. Amount; 45g
/ m 2 was obtained. Then, after skin pass rolling at an elongation of 1%, the sheet was passed through a roll leveler line having a roll diameter of 29 mm in order to impart cracks to the grain boundary oxide layer. The tensile test, workability, and measurement of loss coefficient (η) were performed in the same manner as described above. Table 3 shows the results.
第３表に示すように比較例のNo.1−１では損失係数
（η）は良好であるが、加工性が劣る。発明例であるN
o.3−１では損失係数（η）が高くさらにＴ−EL、Er
値、C.C.V.も良好であることが判る。As shown in Table 3, in Comparative Example No. 1-1, the loss coefficient (η) was good, but the workability was poor. Invention example N
In o.3-1, the loss coefficient (η) is high and T-EL, Er
It can be seen that the values and CCV are also good.
実施例３ 実施例１の操作により粒界酸化層を生じさせたNo.1と
No.3の試料を電気メッキライン状で付着量3g/m2の鉄め
っきを施した後、ロール径29mmのロールレベラーを通板
し粒界酸化層にクラックを付与した。その後に目付量:4
5g/m2の溶融Znめっきを施し、伸び率１％のスキンパス
圧延を施した。その後その特性を調査した。引張試験、
加工性および損失係数（η）の測定は前記と同じ方法で
測定した。第４表にその結果を示す。Example 3 No. 1 in which a grain boundary oxide layer was formed by the operation of Example 1
The sample of No. 3 was subjected to iron plating with an adhesion amount of 3 g / m 2 in the form of an electroplating line, and then passed through a roll leveler having a roll diameter of 29 mm to crack the grain boundary oxide layer. Then the basis weight: 4
Hot-dip Zn plating of 5 g / m 2 was applied, and skin pass rolling at an elongation of 1% was applied. Then its characteristics were investigated. Tensile test,
The workability and the loss coefficient (η) were measured in the same manner as described above. Table 4 shows the results.
第４表により、比較例のNo.1−２は損失係数（η）は
良好であるが加工性に劣る。本発明例であるNo.3−２は
損失係数（η）が高く、加工性も優れていることが判
る。According to Table 4, Comparative Example No. 1-2 has a good loss coefficient (η) but is inferior in workability. It can be seen that No. 3-2 of the present invention has a high loss coefficient (η) and excellent workability.
（発明の効果） 上述のように本発明によれば、鋼板の表面部に粒界酸
化層を形成させる焼鈍処理時フェライト結晶粒粗大化を
生じることなく、加工性に優れた制振鋼板の製造方法を
提供することができる。(Effects of the Invention) As described above, according to the present invention, it is possible to produce a damped steel sheet excellent in workability without causing ferrite crystal grain coarsening during annealing treatment for forming a grain boundary oxide layer on the surface of a steel sheet. A method can be provided.
第１図はフェライト結晶粒組織について、Al含有量と焼
鈍時間の関係を示したグラフである。第２図と第３図は
エリクセン試験後の比較例試片と発明例試片の金属表面
組織を示す写真である。FIG. 1 is a graph showing the relationship between the Al content and the annealing time for the ferrite crystal grain structure. 2 and 3 are photographs showing metal surface structures of a comparative sample and an inventive sample after the Erichsen test.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭58−104116（ＪＰ，Ａ) 特開 平２−34720（ＪＰ，Ａ) 特開 昭56−152931（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C21D 9/46,8/02 C22C 38/00 - 38/06 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-104116 (JP, A) JP-A-2-34720 (JP, A) JP-A-56-1512931 (JP, A) (58) Investigation Field (Int.Cl. 7 , DB name) C21D 9 / 46,8 / 02 C22C 38/00-38/06
Claims (9)
Mn:0.05〜2.5％、Al:0.003〜0.075％、N:0.003〜0.012
％を含有し、残部がFeおよび不可避的不純物からなる鋼
の薄板を、粒界酸化が進行する条件に調整された雰囲気
下で、焼鈍処理することにより、前記鋼板の表面部に粒
界酸化層を形成させ、さらに冷間加工を施して粒界酸化
層にミクロクラックを発生させることからなる加工性の
優れた制振鋼板の製造方法。(1) C: ≦ 0.25%, Si: 0.05-1.5% by weight,
Mn: 0.05-2.5%, Al: 0.003-0.075%, N: 0.003-0.012
%, And the balance of the steel sheet consisting of Fe and unavoidable impurities is subjected to an annealing treatment in an atmosphere adjusted to conditions under which grain boundary oxidation proceeds, so that a grain boundary oxide layer is formed on the surface of the steel sheet. And producing a micro-crack in the grain boundary oxide layer by cold working to produce a vibration damping steel sheet having excellent workability.
Mn:0.05〜2.5％、Al:0.003〜0.075％、N:0.003〜0.012
％を含有し、さらにNb:0.01〜0.20％、Ti:0.01〜0.20％
のうち１種または２種を含有し、残部がFeおよび不可避
的不純物からなる鋼の薄板を、粒界酸化が進行する条件
に調整された雰囲気下で焼鈍処理することにより前記鋼
板の表面部に粒界酸化層を形成させ、さらに冷間加工を
施して粒界酸化層にミクロクラックを発生させることか
らなる加工性の優れた制振鋼板の製造方法。2. The composition according to claim 1, wherein C: ≦ 0.25%, Si: 0.05-1.5%,
Mn: 0.05-2.5%, Al: 0.003-0.075%, N: 0.003-0.012
%, Nb: 0.01 to 0.20%, Ti: 0.01 to 0.20%
A steel sheet containing one or two of the following, the balance being Fe and unavoidable impurities, by annealing the steel sheet under an atmosphere adjusted to conditions under which the grain boundary oxidation proceeds, to the surface of the steel sheet. A method for producing a damped steel sheet having excellent workability, comprising forming a grain boundary oxide layer, and further performing cold working to generate microcracks in the grain boundary oxide layer.
界酸化が進行する条件に調整された雰囲気下で焼鈍処理
することにより前記鋼板の表面部に粒界酸化層を形成さ
せ、さらに冷間加工を施して粒界酸化層にミクロクラッ
クを発生させ、その後に、めっきを施すことからなる加
工性に優れた制振鋼板の製造方法。3. A grain boundary oxide layer is formed on the surface of the steel sheet by subjecting the steel sheet according to claim 1 or 2 to an annealing treatment in an atmosphere adjusted to conditions under which grain boundary oxidation proceeds. Further, a method for producing a vibration-damping steel sheet having excellent workability, which comprises performing micro-cracking in a grain boundary oxide layer by performing cold working and then performing plating.
前に前処理として鉄の電気めっきを施す方法。4. The method according to claim 3, wherein iron is electroplated as a pretreatment before plating.
めっきを冷間圧延前に施す方法。5. The method according to claim 4, wherein the electroplating of iron is performed before cold rolling.
界酸化が進行する条件に調整された雰囲気下で焼鈍処理
することにより前記鋼板の表面部に粒界酸化層を形成さ
せ、さらにめっきを施し、その後に冷間加工を施して粒
界酸化層にミクロクラックを発生させることからなる加
工性に優れた制振鋼板の製造方法。6. A grain boundary oxide layer is formed on the surface of the steel sheet by subjecting the steel sheet according to claim 1 or 2 to an annealing treatment in an atmosphere adjusted to conditions under which grain boundary oxidation proceeds. And a method of producing a vibration-damping steel sheet having excellent workability, which further comprises plating and then performing cold working to generate microcracks in a grain boundary oxide layer.
前に前処理として鉄の電気めっきを施す方法。7. The method according to claim 6, wherein iron is electroplated as a pretreatment before plating.
って、めっき金属が亜鉛またはアルミニウムである方
法。8. The method according to claim 1, wherein the plating metal is zinc or aluminum.
亜鉛の溶融めっきである方法。9. The method according to claim 8, wherein the plating is hot dip galvanizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2307913A JP3034590B2 (en) | 1990-11-14 | 1990-11-14 | Manufacturing method of damping steel sheet with excellent workability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2307913A JP3034590B2 (en) | 1990-11-14 | 1990-11-14 | Manufacturing method of damping steel sheet with excellent workability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04180524A JPH04180524A (en) | 1992-06-26 |
| JP3034590B2 true JP3034590B2 (en) | 2000-04-17 |
Family
ID=17974680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2307913A Expired - Lifetime JP3034590B2 (en) | 1990-11-14 | 1990-11-14 | Manufacturing method of damping steel sheet with excellent workability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3034590B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004263225A (en) * | 2003-02-28 | 2004-09-24 | Toyo Kohan Co Ltd | Steel sheet for cartridge of recording medium, production method therefor, and cartridge of recording medium |
-
1990
- 1990-11-14 JP JP2307913A patent/JP3034590B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04180524A (en) | 1992-06-26 |
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