JPH0952152A - Continuous casting mold - Google Patents
Continuous casting moldInfo
- Publication number
- JPH0952152A JPH0952152A JP20721495A JP20721495A JPH0952152A JP H0952152 A JPH0952152 A JP H0952152A JP 20721495 A JP20721495 A JP 20721495A JP 20721495 A JP20721495 A JP 20721495A JP H0952152 A JPH0952152 A JP H0952152A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- mold
- film
- alloy
- continuous casting
- 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.)
- Withdrawn
Links
- 238000009749 continuous casting Methods 0.000 title claims abstract description 13
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 30
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 28
- 239000002184 metal Substances 0.000 claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 24
- 239000000956 alloy Substances 0.000 claims abstract description 24
- 229910052802 copper Inorganic materials 0.000 claims abstract description 12
- 239000011248 coating agent Substances 0.000 claims description 45
- 238000000576 coating method Methods 0.000 claims description 45
- 239000000463 material Substances 0.000 claims description 13
- 238000005266 casting Methods 0.000 claims description 10
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 5
- 229910007565 Zn—Cu Inorganic materials 0.000 claims description 3
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 230000004907 flux Effects 0.000 abstract description 16
- 239000010949 copper Substances 0.000 description 37
- 238000000034 method Methods 0.000 description 13
- 230000008646 thermal stress Effects 0.000 description 9
- 239000000126 substance Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 238000007751 thermal spraying Methods 0.000 description 5
- 229910001369 Brass Inorganic materials 0.000 description 4
- 239000010951 brass Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Continuous Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ＣｕまたはＣｕ合
金製の連続鋳造用鋳型に関するものであり、特にフラッ
クスを用いるＺｎ−Ｃｕ合金の連続鋳造用鋳型として好
適に用いられるものである。TECHNICAL FIELD The present invention relates to a continuous casting mold made of Cu or Cu alloy, and is particularly preferably used as a continuous casting mold of Zn-Cu alloy using a flux.
【０００２】[0002]
【従来の技術】従来より、ＣｕまたはＣｕ合金製鋳型
（以下、Ｃｕ製鋳型または単に鋳型と略記する場合があ
る）を用いてＺｎ−Ｃｕ合金（黄銅）を鋳造する場合に
は、鋳型と黄銅溶湯の反応を抑制し且つ鋳型と鋳塊の潤
滑性を良好にすることを目的として、例えばＮａ2 ＢＯ
4 やＢ2 Ｏ3 を主成分とするフラックスが頻繁に使用さ
れている。2. Description of the Related Art Conventionally, when a Zn--Cu alloy (brass) is cast using a Cu or Cu alloy mold (hereinafter sometimes abbreviated as Cu mold or simply mold), the mold and brass are used. For the purpose of suppressing the reaction of the molten metal and improving the lubricity of the mold and the ingot, for example, Na 2 BO
A flux containing 4 or B 2 O 3 as a main component is frequently used.
【０００３】これらのフラックスを用いて鋳造を行う
と、鋳造後にフラックスの大部分が鋳型に付着するた
め、付着したフラックスを除去するのに多くの時間を費
やし、生産性が著しく低下するという問題があった。When casting is performed using these fluxes, most of the flux adheres to the mold after casting, so that it takes a lot of time to remove the adhered flux, resulting in a significant decrease in productivity. there were.
【０００４】[0004]
【発明が解決しようとする課題】本発明は上記の様な事
情に着目してなされたものであって、その目的は、フラ
ックスの鋳型への付着が少なく、従って生産性を阻害す
ることがなく、且つ耐摩耗性も良好な鋳造用鋳型を提供
することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and its purpose is to prevent flux from adhering to a mold and thus to prevent productivity from being impaired. Another object of the present invention is to provide a casting mold having good wear resistance.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決すること
のできた本発明の連続鋳造用鋳型とは、ＣｕまたはＣｕ
合金製鋳型における金属溶湯との接触部表面に、下記
（ａ）および（ｂ）の要件を満足する皮膜を有するとこ
ろに要旨を有するものである。 （ａ）該皮膜は、Ｍｏ及び／又はＶを含有すると共に、
残部がＣｕであるか、またはその熱膨張率がＭｏ若しく
はＶに比べてＣｕに近い金属またはその合金からなり、
（ｂ）該皮膜表面部は、Ｍｏ及び／又はＶを６０ａｔ％
以上含有する。上記熱膨張率がＭｏ若しくはＶに比べて
Ｃｕに近い金属またはその合金として推奨されるのは、
Ｃｏ、Ｆｅ、Ｎｉ、またはその合金である。The continuous casting mold of the present invention which can solve the above-mentioned problems is Cu or Cu.
The gist of the present invention lies in that a film satisfying the following requirements (a) and (b) is provided on the surface of the contact part of the alloy mold with the molten metal. (A) The coating contains Mo and / or V, and
The balance is Cu, or a metal whose thermal expansion coefficient is closer to Cu than that of Mo or V, or an alloy thereof,
(B) The coating surface portion contains 60 at% of Mo and / or V.
Contains more than It is recommended that the above-mentioned thermal expansion coefficient is closer to Cu than that of Mo or V, or an alloy thereof,
Co, Fe, Ni, or an alloy thereof.
【０００６】また、本発明鋳型の耐摩耗性を一層向上さ
せることを目的として、皮膜の膜厚を１０μｍ以上にし
たり、或いはフラックス中に溶け込んだ金属溶湯中のＺ
ｎとの反応を抑制し化学的に安定な皮膜を形成させるこ
とを目的として、皮膜中の成分組成を、鋳型における母
材と皮膜の界面から皮膜最表面に向かうにつれて、Ｍｏ
またはＶの濃度を段階的に上昇させるか、または連続的
に上昇させることは本発明の好ましい実施態様である。
上述した本発明の鋳型は、Ｚｎ−Ｃｕ合金を鋳造するの
に特に好適に用いられる。Further, for the purpose of further improving the wear resistance of the mold of the present invention, the thickness of the coating is set to 10 μm or more, or Z in the molten metal melted in the flux is used.
For the purpose of suppressing the reaction with n and forming a chemically stable film, the composition of the components in the film is changed from Mo to Mo
Alternatively, it is a preferred embodiment of the present invention that the concentration of V is increased stepwise or continuously.
The mold of the present invention described above is particularly preferably used for casting a Zn-Cu alloy.
【０００７】[0007]
【発明の実施の形態】本発明者らは、フラックスが鋳型
に付着する原因について調査したところ、黄銅溶湯中よ
りＺｎがフラックス中に溶け込み、更に鋳型中のＣｕと
反応して付着を生じることが分かった。従って、鋳型表
面に、フラックス中に溶け込んだＺｎと反応し難い（即
ち、化学的に安定な）皮膜を形成させれば、この様な付
着現象を防止することができるではないかという観点に
基づいて検討を重ねた結果、本発明を完成したのであ
る。BEST MODE FOR CARRYING OUT THE INVENTION The inventors of the present invention have investigated the cause of adhesion of flux to a mold, and found that Zn dissolves in the flux from the molten brass and further reacts with Cu in the mold to cause adhesion. Do you get it. Therefore, based on the viewpoint that such adhesion phenomenon can be prevented by forming a film that is difficult to react with Zn dissolved in the flux (that is, chemically stable) on the mold surface. As a result of repeated studies, the present invention has been completed.
【０００８】即ち、本発明の連続鋳造用鋳型は、上述し
た様にＣｕまたはＣｕ合金製鋳型における金属溶湯との
接触部表面に、下記（ａ）および（ｂ）の要件を満足す
る皮膜を有する点に特徴を有するものである。 （ａ）該皮膜は、Ｍｏ及び／又はＶを含有すると共に、
残部がＣｕであるか、またはその熱膨張率がＭｏ若しく
はＶに比べてＣｕに近い金属またはその合金からなり、
（ｂ）該皮膜表面部は、Ｍｏ及び／又はＶを６０ａｔ％
以上含有する。That is, the continuous casting mold of the present invention has a film satisfying the following requirements (a) and (b) on the surface of the contact portion with the molten metal in the Cu or Cu alloy mold as described above. It is characterized by points. (A) The coating contains Mo and / or V, and
The balance is Cu, or a metal whose thermal expansion coefficient is closer to Cu than that of Mo or V or an alloy thereof,
(B) The coating surface portion contains 60 at% of Mo and / or V.
Contains more than
【０００９】以下、本発明を特徴付ける皮膜の要件につ
いて詳細に説明する。まず、本発明鋳型の皮膜は、
（ａ）Ｍｏ及び／又はＶを含有すると共に、残部がＣｕ
であるか、またはその熱膨張率がＭｏ若しくはＶに比べ
てＣｕに近い金属またはその合金からなる点に第１の特
徴を有する。The requirements for the coating which characterizes the present invention will be described in detail below. First, the film of the mold of the present invention is
(A) Contains Mo and / or V, and the balance Cu
Or has a first characteristic in that its coefficient of thermal expansion is made of a metal closer to Cu than that of Mo or V or an alloy thereof.
【００１０】本発明において、皮膜中にＭｏ及び／又は
Ｖを含有させるのは、鋳型中のＣｕと、フラックス中に
溶け込んだ溶湯中のＺｎとの反応を最小限に抑えるため
である。即ち、本発明者らの研究したところによれば、
鋳造温度である６００〜８００℃付近で、フラックス中
に溶け込んだＺｎが鋳型のＣｕ中へ拡散しようとして表
面のＣｕと容易に反応することにより融点が急激に低下
する結果、付着を生じてしまう。これに対して本発明鋳
型の皮膜中に添加されるＭｏやＶは高融点金属であり、
上記鋳造温度領域ではＺｎとほとんど反応せず安定であ
る。従って、これらの金属を含有する皮膜は、フラック
ス中に溶け込んだＺｎに対して極めて高い化学的安定性
を発揮し、結果的に鋳型へのフラックスの付着を防止す
ることができる様になるのである。In the present invention, Mo and / or V is contained in the coating in order to minimize the reaction between Cu in the mold and Zn in the molten metal dissolved in the flux. That is, according to the research conducted by the present inventors,
At around 600 to 800 ° C., which is the casting temperature, Zn dissolved in the flux tries to diffuse into Cu of the template and easily reacts with Cu on the surface, so that the melting point sharply decreases, resulting in adhesion. On the other hand, Mo and V added in the film of the mold of the present invention are refractory metals,
In the above casting temperature region, it hardly reacts with Zn and is stable. Therefore, the film containing these metals exhibits extremely high chemical stability with respect to Zn dissolved in the flux, and as a result, it becomes possible to prevent the flux from adhering to the mold. .
【００１１】次に、上記皮膜中、ＭｏおよびＶ以外の残
部を、Ｃｕにするか、またはその熱膨張率がＭｏ若しく
はＶに比べてＣｕに近い金属またはその合金とするの
は、皮膜とＣｕ製鋳型の間に高い密着性を付与するため
である。上述した様に、ＭｏやＶはＺｎに対して、化学
的には極めて安定であるが、下記の表１に示す如くＣｕ
に比べて熱膨張率が大きいため、鋳造時の温度上昇に伴
って皮膜中に熱応力が発生し、皮膜が剥離してしまう恐
れがある。そこで、皮膜中にＣｕを添加するか、または
ＭｏやＶに比べて熱膨張率がＣｕに近い金属またはその
合金を皮膜中に添加することにより、皮膜全体の熱膨張
率が鋳型のそれに近いものとなり、熱応力の発生に起因
する皮膜の剥離を効率よく防止することができるのであ
る。尚、皮膜中に添加し得るＣｕ以外の金属または合金
の例としては、その熱膨張率がＭｏやＶに比べて小さく
且つＣｕに近いものであれば特に限定されないが、実操
業上の観点から言えば、Ｃｏ、Ｆｅ、Ｎｉ等の純金属、
及びそれらの合金、またはＣｏＮｉＣｒＡｌＹ等の耐熱
性合金等が望ましい。表１にこれら金属および合金の熱
膨張率をまとめて示す。Next, in the above coating, the balance other than Mo and V is Cu, or the metal and its alloy whose coefficient of thermal expansion is closer to Cu than that of Mo or V is the coating and Cu. This is to give high adhesion between the molds. As described above, Mo and V are chemically extremely stable with respect to Zn, but as shown in Table 1 below, Cu and
Since the coefficient of thermal expansion is larger than that of, the thermal stress may be generated in the coating film as the temperature rises during casting, and the coating film may peel off. Therefore, by adding Cu to the coating, or by adding a metal or its alloy whose coefficient of thermal expansion is closer to Cu than that of Mo or V to the coating, the coefficient of thermal expansion of the entire coating is close to that of the mold. Therefore, the peeling of the coating film due to the generation of thermal stress can be efficiently prevented. It should be noted that examples of the metal or alloy other than Cu that can be added to the film are not particularly limited as long as its coefficient of thermal expansion is smaller than Mo or V and close to Cu, but from the viewpoint of actual operation. Speaking of pure metals such as Co, Fe and Ni,
And those alloys or heat resistant alloys such as CoNiCrAlY are desirable. Table 1 summarizes the thermal expansion coefficients of these metals and alloys.
【００１２】[0012]
【表１】 [Table 1]
【００１３】尚、表１に示す金属または合金は、いずれ
もその熱膨張率がＭｏやＶに比べて小さく且つＣｕに比
べて若干大きいものであるが、これに限定される訳では
ない。従って、その熱膨張率がＣｕよりも小さい金属ま
たは合金であって、且つその熱膨張率とＣｕとの差（絶
対値）が、ＭｏやＶとＣｕとの熱膨張率の差（絶対値）
に比べて小さいものも本発明の範囲内に包含される。更
に、本発明では、（ｂ）皮膜表面部（尚、本発明におけ
る表面部とは、皮膜最表面から約１μｍまでの深さにお
ける膜厚部分を意味するものである）におけるＭｏ及び
／又はＶを６０ａｔ％以上とする点に第２の特徴を有す
る。The metals or alloys shown in Table 1 have a coefficient of thermal expansion smaller than that of Mo or V and slightly larger than that of Cu, but the present invention is not limited to this. Therefore, it is a metal or an alloy whose coefficient of thermal expansion is smaller than Cu, and the difference (absolute value) between the coefficient of thermal expansion and Cu is the difference (absolute value) between the coefficient of thermal expansion of Mo or V and Cu.
Those smaller than the above are also included in the scope of the present invention. Furthermore, in the present invention, Mo and / or V in (b) the film surface portion (the surface portion in the present invention means a film thickness portion at a depth of about 1 μm from the outermost surface of the film). Has a second characteristic in that it is 60 at% or more.
【００１４】ここで、皮膜表面部のＭｏ及び／又はＶの
総濃度を６０ａｔ％以上とするのは、Ｚｎに対して高度
の化学的安定性を付与するためである。好ましい下限値
は８０ａｔ％である。上述した様に、本発明鋳型の皮膜
は、Ｍｏ及び／又はＶの他、残部成分としてＣｕまたは
その熱膨張率がＭｏ若しくはＶに比べてＣｕに近い金属
またはその合金を含むものである。そして、表１に示し
た様に、ＭｏやＶの熱膨張率はＣｕに比べて非常に大き
いので、皮膜中にＭｏやＶ以外の残部成分の割合を増加
させれば皮膜全体の熱膨張率はＣｕに近づき、結果的に
熱応力の発生を抑えることができる。しかしながら、上
記残部成分中に含まれる金属が合金はＺｎと反応し易
く、これらの割合を増加することは、逆に、Ｚｎに対す
る皮膜の安定性を著しく低下させるという不具合を招い
てしまう。そこで、本発明者らがこの矛盾する現象を回
避すべく研究をすすめた結果、金属溶湯と接触する皮膜
表面部におけるＭｏ及び／又はＶの合計濃度を６０ａｔ
％以上に特定することにより、実操業レベルにおいても
Ｚｎに対して優れた化学的安定性を付与し得ると共に、
皮膜全体としては熱応力の発生を抑えることができ、該
熱応力に起因する皮膜の剥離を有効に防止できることが
分かった。Here, the total concentration of Mo and / or V on the surface of the coating is set at 60 at% or more in order to impart a high degree of chemical stability to Zn. A preferable lower limit value is 80 at%. As described above, the coating film of the mold of the present invention contains, in addition to Mo and / or V, Cu or a metal whose thermal expansion coefficient is closer to Cu than that of Mo or V, or an alloy thereof, as the balance component. And, as shown in Table 1, since the coefficient of thermal expansion of Mo and V is much higher than that of Cu, if the proportion of the remaining components other than Mo and V is increased in the film, the coefficient of thermal expansion of the entire film is increased. Can approach Cu, and as a result, the generation of thermal stress can be suppressed. However, the metal contained in the balance component is liable to react with Zn in the alloy, and increasing the ratio of these causes, on the contrary, a problem that the stability of the coating film against Zn is significantly lowered. Then, as a result of the inventors of the present invention conducting research to avoid this contradictory phenomenon, the total concentration of Mo and / or V at the coating surface portion in contact with the molten metal is 60 at.
% Or more, it is possible to impart excellent chemical stability to Zn even at the actual operation level, and
It was found that the generation of thermal stress can be suppressed in the entire coating and the peeling of the coating due to the thermal stress can be effectively prevented.
【００１５】この様に本発明では皮膜表面部におけるＭ
ｏ及び／又はＶの総濃度を特定するところに特徴がある
のであって、皮膜全体の濃度を規定するものではない
が、皮膜全体のＭｏ及び／又はＶの好ましい濃度として
は１０ａｔ％であり、より好ましくは２０ａｔ％であ
る。As described above, in the present invention, M in the film surface portion is
Since it is characterized in that the total concentration of o and / or V is specified and does not prescribe the concentration of the entire coating, the preferable concentration of Mo and / or V in the entire coating is 10 at%, More preferably, it is 20 at%.
【００１６】以上が、本発明の鋳造用鋳型を特徴付ける
皮膜の基本要件に関する説明であるが、更に皮膜の密着
性や化学的安定性を高めることを目的として、以下の様
な要件を具備することが推奨される。The above is a description of the basic requirements for the coating film that characterizes the casting mold of the present invention. To further improve the adhesion and chemical stability of the coating film, the following requirements must be met. Is recommended.
【００１７】皮膜の膜厚を１０μｍ以上とする。膜厚
をこの様に規定したのは、黄銅の凝固殻と皮膜との間で
摩耗が生じて皮膜が少しずつ減少していくのを防止する
ためである。実操業上の観点からみて好ましいのは５０
μｍ以上であり、この程度の厚みにすれば、通常の鋳型
寿命レベルにおいて連続鋳造中に皮膜が摩耗して消失す
ることはないと考えられる。尚、膜厚の上限は特に制限
されないが、コストや生産性等を考慮すると、１０００
μｍ程度にすることが望ましい。The thickness of the film is 10 μm or more. The film thickness is defined in this way in order to prevent abrasion between the solidified shell of brass and the film and the film from gradually decreasing. 50 is preferable from the viewpoint of actual operation.
It is considered that the coating film is not worn away during continuous casting at a normal mold life level when the thickness is about μm or more and at this level. The upper limit of the film thickness is not particularly limited, but in consideration of cost and productivity, it is 1000
It is desirable to set the thickness to about μm.
【００１８】皮膜成分の分布形態（濃度分布）を、鋳
型における母材と皮膜の界面から皮膜最表面に向かうに
つれて、ＭｏまたはＶの濃度を段階的に上昇させるか、
または連続的に上昇させる。With respect to the distribution form (concentration distribution) of the coating components, the concentration of Mo or V is increased stepwise from the interface between the base material and the coating in the mold to the outermost surface of the coating.
Or raise continuously.
【００１９】この様に、皮膜最表面に向かうにつれてＭ
ｏやＶの濃度を高くする（即ち、ＭｏやＶの濃度勾配
は、皮膜最表面に向かうにつれて大きくなる）ことによ
って、Ｚｎに対して高い化学的安定性を一層有効に発揮
させることができる。この様な構成にすることは、即
ち、ＭｏやＶ以外の残部成分（即ち、熱膨張率がＣｕに
近いもの）の濃度を母材に近い界面側に向かうにつれて
高くすることと同義であり、その結果、母材と皮膜界面
での熱応力を緩和することができるという効果も得られ
るのである。即ち、上述した構成に特定することによっ
て、皮膜中に発生する熱応力を緩和しつつ且つＺｎに対
して高い化学的安定性を備えるという所期の目的を一層
有効に発揮させることができるのである。尚、ＭｏやＶ
の濃度は、段階的に上昇させても良いし、連続的に上昇
させても良い。As described above, as the outermost surface of the film is reached, M
By increasing the concentration of o or V (that is, the concentration gradient of Mo or V becomes larger toward the outermost surface of the film), high chemical stability with respect to Zn can be more effectively exhibited. Making such a structure is synonymous with increasing the concentration of the remaining components other than Mo and V (that is, those having a coefficient of thermal expansion close to Cu) toward the interface close to the base material. As a result, the effect that the thermal stress at the interface between the base material and the film can be relaxed can be obtained. That is, by specifying the above-mentioned constitution, it is possible to more effectively exert the intended purpose of relieving the thermal stress generated in the film and having high chemical stability with respect to Zn. . In addition, Mo and V
The concentration may be increased stepwise or continuously.
【００２０】即ち、ＭｏやＶの濃度を段階的に上昇させ
てやれば、皮膜中に発生する熱応力を皮膜の中間部分で
緩和することができることが分かる。そして、結果的に
皮膜表面部のＭｏ濃度が高くなるために、Ｚｎに対して
一層安定な皮膜が形成される様になるのである。また、
皮膜中のＭｏやＶの濃度を滑らかに連続的に上昇させて
やれば皮膜の熱膨張率は連続的に変化するので、皮膜中
に発生する熱応力は、上記の段階的上昇方法に比べて一
層効果的に緩和される様になる。That is, it is understood that the thermal stress generated in the coating can be relaxed in the middle portion of the coating by gradually increasing the concentrations of Mo and V. As a result, the Mo concentration on the surface of the film is increased, so that a more stable film is formed against Zn. Also,
If the concentration of Mo or V in the coating is smoothly and continuously increased, the coefficient of thermal expansion of the coating changes continuously, so the thermal stress generated in the coating is higher than that in the stepwise increase method described above. It will be alleviated more effectively.
【００２１】この様に皮膜中のＭｏやＶの濃度を制御す
る方法としては、例えば後記する溶射法を用いる場合、
その溶射プロセスにおいて、Ｍｏ粉末やＶ粉末と、Ｃｕ
あるいはＭｏやＶよりもその熱膨張率がＣｕに近い金属
または合金の粉末の供給割合を段階的または連続的に変
化させる方法が挙げられる。As a method of controlling the concentration of Mo or V in the coating film as described above, for example, in the case of using the thermal spraying method described later,
In the thermal spraying process, Mo powder, V powder, Cu
Alternatively, there may be mentioned a method in which the supply ratio of a powder of a metal or an alloy whose thermal expansion coefficient is closer to that of Cu than that of Mo or V is changed stepwise or continuously.
【００２２】尚、上述した皮膜を形成させる方法として
は特に限定されず、溶射法、スパッタリング法、イオン
プレーティング法、ＣＶＤ法、めっき法等、種々の方法
を適用することができる。そのなかでも溶射法は、皮膜
と母材の密着強度が高く且つ皮膜を高速に形成すること
ができるという観点から最も推奨される方法である。The method for forming the above-mentioned film is not particularly limited, and various methods such as a thermal spraying method, a sputtering method, an ion plating method, a CVD method and a plating method can be applied. Among them, the thermal spraying method is the most recommended method from the viewpoint that the adhesion strength between the coating and the base material is high and the coating can be formed at high speed.
【００２３】以下実施例に基づいて本発明を詳述する。
ただし、下記実施例は本発明を制限するものではなく、
前・後記の趣旨を逸脱しない範囲で変更実施することは
全て本発明の技術範囲に包含される。Hereinafter, the present invention will be described in detail with reference to examples.
However, the following examples do not limit the present invention,
All modifications and alterations without departing from the spirit of the preceding and following descriptions are included in the technical scope of the present invention.
【００２４】[0024]
【実施例】脱酸銅を母材とし、表２に示す皮膜成分を有
する供試材を作製した。尚、皮膜の形成方法は表２に併
記する通りである。Example A sample material having the film components shown in Table 2 was prepared using deoxidized copper as a base material. The method for forming the coating is as shown in Table 2.
【００２５】[0025]
【表２】 [Table 2]
【００２６】この様にして作製した供試材を用いて、下
記項目を評価した。 ［耐熱衝撃性］各供試材に、５００℃と水冷の熱衝撃を
繰り返し負荷し、供試材の皮膜中に亀裂また剥離が生じ
たサイクル数を測定することによって評価した。 ［耐溶融Ｚｎ性］５００℃の純Ｚｎ溶湯中に各供試材を
１時間浸漬した後における、皮膜の減肉の割合を測定す
ることにより評価した。これらの結果を表２に併記す
る。The following items were evaluated using the test materials thus produced. [Thermal shock resistance] Each test material was repeatedly subjected to thermal shock of 500 ° C. and water cooling, and evaluated by measuring the number of cycles in which cracks or peeling occurred in the film of the test material. [Melting Zn resistance] Evaluation was performed by measuring the rate of thinning of the film after immersing each test material in a pure Zn melt at 500 ° C for 1 hour. Table 2 also shows these results.
【００２７】表２に示す様に、本発明の要件を満足する
供試材はいずれも、比較材に比べて耐熱衝撃性および耐
溶融Ｚｎ性の双方に優れていた。本発明材のなかでも、
皮膜を溶射法によって形成すると共に、皮膜最表面のＭ
ｏまたはＶの濃度を１００ａｔ％にしたものは、上記諸
特性に最も優れていることが分かった。As shown in Table 2, each of the test materials satisfying the requirements of the present invention was superior in both thermal shock resistance and molten Zn resistance to the comparative material. Among the materials of the present invention,
The coating is formed by the thermal spraying method, and M on the outermost surface of the coating
It was found that the one in which the concentration of o or V was 100 at% was the most excellent in the above various characteristics.
【００２８】[0028]
【発明の効果】本発明は上記の様に構成されており、フ
ラックスの鋳型への付着が少なく（即ち高度の耐溶融Ｚ
ｎ性を有する）、従って生産性を阻害することがなく、
且つ耐摩耗性も良好な鋳造用鋳型を提供することができ
る。The present invention is constructed as described above, and the amount of flux adhered to the mold is small (that is, the high melting resistance Z).
n), and thus does not hinder productivity,
Further, it is possible to provide a casting mold having good wear resistance.
Claims (5)
溶湯との接触部表面に、下記（ａ）および（ｂ）の要件
を満足する皮膜を有することを特徴とする連続鋳造用鋳
型。 （ａ）該皮膜は、Ｍｏ及び／又はＶを含有すると共に、
残部がＣｕであるか、またはその熱膨張率がＭｏ若しく
はＶに比べてＣｕに近い金属またはその合金からなり、 （ｂ）該皮膜表面部は、Ｍｏ及び／又はＶを６０ａｔ％
以上含有する。1. A continuous casting mold comprising a Cu or Cu alloy mold, and a coating which meets the following requirements (a) and (b) on the surface of the contact portion with the molten metal. (A) The coating contains Mo and / or V, and
The balance is Cu, or a metal whose thermal expansion coefficient is closer to Cu than Mo or V or an alloy thereof, (b) the coating surface portion contains 60 at% of Mo and / or V.
Contains more than
Ｃｕに近い金属またはその合金が、Ｃｏ、Ｆｅ、Ｎｉま
たはその合金である請求項１に記載の連続鋳造用鋳型。2. The continuous casting mold according to claim 1, wherein the metal having a coefficient of thermal expansion closer to Cu than that of Mo or V or an alloy thereof is Co, Fe, Ni or an alloy thereof.
ものである請求項１または２に記載の連続鋳造用鋳型。3. The continuous casting mold according to claim 1, wherein the film has a film thickness of 10 μm or more.
最表面に向かうにつれて、ＭｏまたはＶの濃度が段階的
に上昇するか、または連続的に上昇するものである請求
項１〜３のいずれかに記載の連続鋳造用鋳型。4. The concentration of Mo or V increases stepwise or continuously from the interface between the base material and the coating in the mold toward the outermost surface of the coating. A mold for continuous casting according to Crab.
項１〜４のいずれかに記載の連続鋳造用鋳型。5. The continuous casting mold according to claim 1, which is used for casting a Zn—Cu alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20721495A JPH0952152A (en) | 1995-08-14 | 1995-08-14 | Continuous casting mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20721495A JPH0952152A (en) | 1995-08-14 | 1995-08-14 | Continuous casting mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0952152A true JPH0952152A (en) | 1997-02-25 |
Family
ID=16536137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20721495A Withdrawn JPH0952152A (en) | 1995-08-14 | 1995-08-14 | Continuous casting mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0952152A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008049081A1 (en) * | 2006-10-18 | 2008-04-24 | Inframat Corporation | Casting molds coated for surface enhancement and methods of making them |
-
1995
- 1995-08-14 JP JP20721495A patent/JPH0952152A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008049081A1 (en) * | 2006-10-18 | 2008-04-24 | Inframat Corporation | Casting molds coated for surface enhancement and methods of making them |
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