JPH1157949A - Mold for continuous casting - Google Patents
Mold for continuous castingInfo
- Publication number
- JPH1157949A JPH1157949A JP23887297A JP23887297A JPH1157949A JP H1157949 A JPH1157949 A JP H1157949A JP 23887297 A JP23887297 A JP 23887297A JP 23887297 A JP23887297 A JP 23887297A JP H1157949 A JPH1157949 A JP H1157949A
- Authority
- JP
- Japan
- Prior art keywords
- continuous casting
- plating
- piece
- casting mold
- short
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- Continuous Casting (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、溶射によって長
片、及び短片の内面を硬くし、長寿命化が図れる連続鋳
造用鋳型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting mold for continuous casting in which the inner surfaces of long and short pieces are hardened by thermal spraying to extend the life.
【0002】[0002]
【従来の技術】従来、溶鋼を連続鋳造する連続鋳造機の
一形態として、図16に示す湾曲型連続鋳造機Gが広汎
に使用されている。この湾曲型連続鋳造機Gは、平行に
支持された一対のバックフレーム80間に、2つの連続
鋳造用鋳型Hを配置してなる2ストランドタイプの連続
鋳造機である。なお、それぞれの鋳型Hは、図17に示
すように、一対の長片81、81aと、この一対の長片
81、81aの間に配置された一対の短片82、82a
とを備えたものである。2. Description of the Related Art Conventionally, a curved continuous casting machine G shown in FIG. 16 has been widely used as one form of a continuous casting machine for continuously casting molten steel. The curved continuous casting machine G is a two-strand type continuous casting machine in which two continuous casting molds H are arranged between a pair of back frames 80 supported in parallel. As shown in FIG. 17, each mold H has a pair of long pieces 81, 81a and a pair of short pieces 82, 82a arranged between the pair of long pieces 81, 81a.
It is provided with.
【0003】[0003]
【発明が解決しようとする課題】しかしながら、前記従
来の鋳型Hにおいては、溶鋼を連続鋳造する際、この鋳
型Hの内面と鋳片83との間にパウダーを介在させてい
るが、それでも、鋳片殻が厚くなる鋳型Hの下部では、
この厚くて硬い鋳片殻によって、軟質な鋳型Hの内面が
摩耗する。このため、鋳型Hの寸法が変わって、鋳片8
3の寸法精度が低下するほか、鋳型Hと鋳片83との間
にエアーギャップが生じて、鋳片殻の厚みが不均一とな
り、鋳片83に縦割れが生じ易くなる。また、溶鋼を連
続鋳造する際、この鋳型Hの長片81、81a、及び短
片82、82aはそれぞれ熱膨張する(特に、溶鋼のメ
ニスカス近傍部位で顕著である(図18(e)参
照))。この際、例えば、図18(a)に示すように、
各短片82、82aの両端部の内側部分が中に張り出
す、コーナー張り出し部84が生じ、連続鋳造終了後、
このコーナー張り出し部84を“コーキングハンマー”
等で叩いて、元に戻す作業が必要となる。However, in the conventional mold H, when molten steel is continuously cast, powder is interposed between the inner surface of the mold H and the slab 83. At the bottom of the mold H where the shell becomes thicker,
The inner surface of the soft mold H is worn by the thick and hard slab shell. For this reason, the dimension of the mold H changes, and the slab 8
In addition to the decrease in dimensional accuracy of No. 3, an air gap is generated between the mold H and the slab 83, the thickness of the slab shell becomes nonuniform, and the slab 83 tends to be vertically cracked. Further, when the molten steel is continuously cast, the long pieces 81, 81a and the short pieces 82, 82a of the mold H are each thermally expanded (particularly, in a portion near the meniscus of the molten steel (see FIG. 18E)). . At this time, for example, as shown in FIG.
A corner overhang portion 84 occurs in which the inner portions of both ends of each short piece 82, 82a overhang, and after continuous casting,
This corner overhang portion 84 is called "caulking hammer"
It is necessary to perform the operation of undoing by tapping with etc.
【0004】また、図18(b)に示すように、それぞ
れの短片82、82aが熱膨張して、その両端部の内側
部分が、各長片81、81aの内面に食い込んで、押し
疵85が生じると、連続鋳造終了時、又は連連鋳の取鍋
交換期など、鋳型H内の溶鋼量が少なくなって、各短片
82、82aが熱収縮したとき、図18(c)に示すよ
うに、コーナーギャップgが生じる。このため、次の連
続鋳造の際、このコーナーギャップgに溶鋼等が差し込
んで、安定操業ができなくなる。即ち、各長片81、8
1aの両側内部に冷却水を通すスリットを設けなかった
場合、鋳型内コーナー部での冷却能が低くなって、前記
コーナーギャップgに差し込んだ溶鋼が凝固し難くな
り、鋳片殻を厚く形成することができなくなって、拘束
性ブレークアウトが発生し易くなる。Further, as shown in FIG. 18 (b), the short pieces 82, 82a are thermally expanded, and the inner portions at both ends bite into the inner surfaces of the long pieces 81, 81a, and the pressing flaw 85 is formed. As shown in FIG. 18 (c), when the amount of molten steel in the mold H decreases and the short pieces 82 and 82a thermally shrink at the end of continuous casting or during the ladle exchange period of continuous casting, , A corner gap g occurs. Therefore, at the time of the next continuous casting, molten steel or the like is inserted into the corner gap g, and stable operation cannot be performed. That is, each of the long pieces 81, 8
If the slits for passing cooling water are not provided inside both sides of 1a, the cooling capacity at the corners in the mold will be low, and the molten steel inserted into the corner gap g will not be easily solidified, and the slab shell will be formed thick. And restrictive breakout is more likely to occur.
【0005】また、最近では、それぞれの短片82、8
2aを、各長片81、81aの長手方向に沿ってスライ
ドさせる、幅可変の鋳型が主流となってきている。とこ
ろが、この場合、図18(d)に示すように、それぞれ
の長片81、81aの内面に擦り疵hが発生する。この
ため、上述したパウダーが下方へ流れようとしても、こ
の擦り疵h内に入り込んでしまい、鋳型Hと鋳片83と
の間に満遍なく介在させることができない。従って、鋳
型内面に鋳片殻が溶着してブレークアウトが発生するほ
か、鋳型Hの冷却能が不均一となって、鋳片83に縦割
れが発生するなど、鋳片品質が低下する。また、上述し
たようなコーナーギャップg、擦り疵hによって、鋳型
内面の摩耗が著しくなるという問題もある。そこで、本
発明者等は、図19(a)、(b)に示すように、それ
ぞれの長片86の母材87の内面全面にNiめっき88
を形成すると共に、このNiめっき88の上面全面にC
rめっき89を形成した鋳型を提案した。Recently, each of the short pieces 82, 8
A variable width mold that slides 2a along the longitudinal direction of each long piece 81, 81a is becoming mainstream. However, in this case, as shown in FIG. 18D, scratches h occur on the inner surfaces of the long pieces 81 and 81a. For this reason, even if the above-mentioned powder tries to flow downward, it enters the abrasion flaw h and cannot be evenly interposed between the mold H and the slab 83. Therefore, the slab shell is welded to the inner surface of the mold to cause a breakout, and the cooling ability of the mold H becomes non-uniform. In addition, there is also a problem that the inner surface of the mold is significantly worn due to the corner gap g and the abrasion f described above. Then, the present inventors, as shown in FIGS. 19 (a) and (b), use Ni plating 88 on the entire inner surface of the base material 87 of each long piece 86.
Is formed, and C is formed on the entire upper surface of the Ni plating 88.
A mold having r plating 89 formed thereon was proposed.
【0006】また、特公昭60−39654号公報に
は、長片の母材において、各短片が摺動当接する両内側
側部、及び、鋳片殻が触れる内側下部に、それぞれNi
めっきを形成すると共に、このNiめっきを覆って、母
材の内面全面にNi合金めっきを形成し、更に、このN
i合金めっきの上面全面にCrめっきを形成した鋳型が
提案されている。ところが、この場合、図19(a)、
(b)に示すように、Crめっき89に局部的な剥離j
が生じると、この表層のCrめっき89と、その下地層
であるNiめっき88との間、また、前記公報記載の鋳
型においては、表層のCrめっきと、その下地層のNi
合金めっきとの間に電位差が生じて、局部電池が構成さ
れ(図19(c)参照)、孔食pが進む(図19
(d)、(e)参照)という問題がある。そこで、本発
明者等は、更に、図20、図21に示す鋳型を提案し
た。Japanese Patent Publication No. 60-39654 discloses that, in a base material of a long piece, Ni is provided on both inner side portions where the short pieces are in sliding contact with each other and on an inner lower portion where the slab shell contacts.
In addition to forming the plating, a Ni alloy plating is formed on the entire inner surface of the base material so as to cover the Ni plating.
A mold in which Cr plating is formed on the entire upper surface of i-alloy plating has been proposed. However, in this case, FIG.
(B) As shown in FIG.
Occurs, between the surface Cr plating 89 and the underlying Ni plating 88, and in the mold described in the above publication, the surface Cr plating and the underlying Ni plating 88
A potential difference is generated between the plating and the alloy plating to form a local battery (see FIG. 19 (c)), and the pitting corrosion p proceeds (FIG. 19).
(See (d) and (e)). Therefore, the present inventors have further proposed a mold shown in FIGS.
【0007】即ち、この鋳型は、上述した表層のCrめ
っきを除いたものであり、長片93においては、図20
に示すように、その母材90の内面全面にNiめっき9
1を形成すると共に、このNiめっき91の上面で、鋳
片殻が触れる内側下部91a、及び、その両内側側部分
で、上側部分を除く部分91bに、それぞれ、Ni−C
oめっき92、92aを形成し、短片97においては、
図21に示すように、その母材94の内面全面にNiめ
っき95を形成すると共に、その内側下部95aにNi
−Coめっき96を形成したものである。ところが、こ
の場合、前記孔食の問題は解決されるものの、上述した
コーナーギャップgや、擦り疵h、更に、これらに起因
する鋳型の短命化の問題を解決することができず、約5
00チャージ程度で交換する必要があった。本発明はか
かる事情に鑑みてなされたもので、長片や短片の内面に
硬くて緻密な溶射皮膜層を形成して、長寿命化が図れる
連続鋳造用鋳型を提供することを目的とする。That is, this mold is obtained by removing the above-mentioned Cr plating on the surface layer.
As shown in FIG.
1 on the upper surface of the Ni plating 91, and Ni-C on the inner lower portion 91a touched by the slab shell, and Ni-C
o plating 92, 92a is formed, and in the short piece 97,
As shown in FIG. 21, Ni plating 95 is formed on the entire inner surface of the base material 94, and Ni plating 95 is formed on the inner lower portion 95a.
-Co plating 96 is formed. However, in this case, although the problem of the pitting corrosion is solved, the above-mentioned problem of the corner gap g, the scratches h, and the problem of shortening the life of the mold caused by these problems cannot be solved.
It was necessary to replace it with about 00 charges. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a continuous casting mold in which a hard and dense sprayed coating layer is formed on the inner surface of a long piece or a short piece to extend the life.
【0008】[0008]
【課題を解決するための手段】前記目的に沿う請求項1
記載の連続鋳造用鋳型は、一対の長片と、該一対の長さ
間に配置された一対の短片とを有する連続鋳造用鋳型で
あって、前記各短片が摺動当接する前記長片の両内側側
部、及び、凝固した鋳片殻が触れる前記長片の内側下部
に、自溶性合金の第1の溶射皮膜層がそれぞれ形成され
ていると共に、前記鋳片殻が触れる前記短片の内側下部
にも、自溶性合金の第2の溶射皮膜層がそれぞれ形成さ
れている。なお、長片の両内側側部と内側下部だけ第1
の溶射皮膜層を形成したり、逆に、短片の内側下部だけ
第2の溶射皮膜層を形成することも可能である。According to the present invention, there is provided a semiconductor device comprising:
The continuous casting mold according to the present invention is a continuous casting mold having a pair of long pieces and a pair of short pieces disposed between the pair of lengths, wherein each of the short pieces is in sliding contact with each other. A first thermal spray coating layer of a self-fluxing alloy is formed on both inner side portions and a lower inner portion of the long piece contacted by the solidified slab shell, and the inside of the short piece touched by the slab shell. A second thermal spray coating layer of a self-fluxing alloy is also formed on the lower portion. In addition, only the inner side and lower side of the long piece are the first.
It is also possible to form the thermal spray coating layer of the above, or conversely, to form the second thermal spray coating layer only on the lower inside of the short piece.
【0009】また、請求項2記載の連続鋳造用鋳型は、
請求項1記載の連続鋳造用鋳型において、前記長片の内
側上部で、少なくとも前記第1の溶射皮膜層に隣接する
部分、及び、前記短片の内側上部で、少なくとも前記第
2の溶射皮膜層に隣接する部分に、Ni又はNi合金め
っきがそれぞれ形成されている。なお、長片の内側上部
で、少なくとも第1の溶射皮膜層に隣接する部分だけN
i又はNi合金めっきを形成したり、逆に、短片の内側
上部で、少なくとも第2の溶射皮膜層に隣接する部分だ
けNi又はNi合金めっきを形成することも可能であ
る。また、前記Ni合金めっきには、Ni−Coめっ
き、Ni−Feめっき等が含まれる。Further, the continuous casting mold according to claim 2 is
2. The continuous casting mold according to claim 1, wherein at least a portion adjacent to the first sprayed coating layer on an inner upper portion of the long piece and at least an inner upper portion of the short piece, at least on the second sprayed coating layer. 3. Ni or Ni alloy plating is formed on adjacent portions, respectively. Note that at least a portion adjacent to the first sprayed coating layer on the inner upper portion of the long piece is N
It is also possible to form the i or Ni alloy plating, or conversely, to form the Ni or Ni alloy plating only on the inner upper portion of the short piece and at least the portion adjacent to the second thermal spray coating layer. The Ni alloy plating includes Ni-Co plating, Ni-Fe plating and the like.
【0010】更に、請求項3記載の連続鋳造用鋳型は、
請求項1又は2記載の連続鋳造用鋳型において、前記長
片の内側上部、及び、前記短片の内側上部の表層には、
Crめっきがそれぞれ形成されている。なお、長片の内
側上部の表層だけCrめっきを形成したり、逆に、短片
の内側上部の表層だけCrめっきを形成することも可能
である。また、前記Crめっきは、鋳型の母材表面に直
接形成したり、この母材表面に形成されたNi又はNi
合金めっき上に形成してもよい。Further, the continuous casting mold according to claim 3 is
In the continuous casting mold according to claim 1 or 2, the inner upper portion of the long piece, and the surface layer of the inner upper portion of the short piece,
Cr plating is formed respectively. It is also possible to form Cr plating only on the upper surface layer of the inside of the long piece, or conversely, to form Cr plating only on the upper surface layer of the inside of the short piece. The Cr plating may be formed directly on the surface of the base material of the mold, or may be Ni or Ni formed on the surface of the base material.
It may be formed on alloy plating.
【0011】ここで、長片の両内側側部とは、幅固定
の鋳型において短片が当接する部位、幅可変の鋳型に
おいて短片が摺動当接する部位をいう。また、溶鋼を連
続鋳造する際、短片両端部の内側部分が中に張り出す場
合(図18(a)参照)を考慮して、若干広め(例え
ば、10〜20mm程度)にすることも可能である。ま
た、長片や短片の内側下部とは、溶鋼を連続鋳造する
際、鋳片殻(鋳片であってもよい)が触れる部位であれ
ば、特に、規定されるものではない。もちろん、この内
側下部の範囲を、溶鋼の連続鋳造の際、この鋳型内に貯
溜される溶鋼のメニスカスより下側にすると、最も高温
となるメニスカス近傍の熱の影響を受けて、第1、第2
の溶射皮膜層にヒートクラックが生じたり、最悪の場
合、第1、第2の溶射皮膜層が剥離したりするのを防止
できる。Here, both inner side portions of the long piece refer to a portion where the short piece abuts in a fixed width mold and a portion where the short piece abuts in a variable width mold. In addition, when the molten steel is continuously cast, it may be slightly wider (for example, about 10 to 20 mm) in consideration of the case where the inner portions of both ends of the short piece protrude inward (see FIG. 18A). is there. In addition, the inner lower part of the long piece or the short piece is not particularly limited as long as it is a part that the slab shell (may be a slab) touches during continuous casting of molten steel. Of course, if the range of the inner lower portion is lower than the meniscus of the molten steel stored in the mold during the continuous casting of molten steel, the first and second portions are affected by the heat near the meniscus where the temperature becomes the highest. 2
In the worst case, the first and second sprayed coating layers can be prevented from generating heat cracks in the sprayed coating layer.
【0012】具体的には、長片や短片の下端より、その
全高(L1 )の約1/5〜3/5程度、好ましくは約2
/5〜3/5程度とするのが望ましい。これは、前記
「内側下部」の範囲が、前記下端より、全高の2/5未
満になると、第1、第2の溶射皮膜層による鋳型の摩耗
防止効果が低下し、特に、全高の1/5未満になると、
その傾向が著しくなり、逆に、全高の3/5を超える
と、製造コストが高騰すると共に、上述した如く、第
1、第2の溶射皮膜層にヒートクラックが生じ易くなる
からである。なお、上述した部位に第1、第2の溶射皮
膜層を形成する方法としては、火炎溶射法、アーク溶射
法、プラズマ溶射法、高速火炎溶射法等を適用できる
が、中でも、高速火炎溶射が望ましい。高速火炎溶射の
火炎(フレーム)速度が通常の火炎溶射(約300m/
秒)やプラズマ溶射(約800m/秒)に比較して大き
い(約2000〜2700m/秒)ので、上述した部位
に硬くて、しかも、緻密な溶射皮膜層を形成することが
でき、長寿命化が図れるからである。[0012] Specifically, the length piece and the lower end of the short piece of about 1 / 5-3 / 5 of about the total height (L 1), preferably about 2
It is desirable to be about 5〜 to /. This is because, when the range of the “inner lower portion” is less than / of the total height from the lower end, the effect of preventing the mold from being worn by the first and second sprayed coating layers is reduced, and particularly, 1 / の of the total height. If it is less than 5,
This is because the tendency becomes remarkable. Conversely, if it exceeds 3/5 of the total height, the production cost rises, and as described above, heat cracks are easily generated in the first and second sprayed coating layers. In addition, as a method of forming the first and second sprayed coating layers on the above-described portions, a flame spraying method, an arc spraying method, a plasma spraying method, a high-speed flame spraying method, or the like can be applied. desirable. The flame (flame) speed of high-speed flame spraying is normal flame spraying (about 300 m /
Second) and plasma spraying (about 800 m / sec) (about 2000 to 2700 m / sec), so that a hard and dense sprayed coating layer can be formed on the above-mentioned portion, and the life is extended. This is because
【0013】また、Ni又はNi合金めっきは、長片の
内側上部で、しかも、内側下部との隣接部分、また、短
片の内側上部で、しかも、内側下部との隣接部分だけで
なく、前記長片の内側上部、また、短片の内側上部全域
に形成してもよい。この際、前記隣接部分にNi又はN
i合金めっきを形成すると、長片や短片の内側上部と溶
射皮膜層との境界部分で、硬さの相違に依る局部的な摩
耗が生じるのを防止することができ、また、前記内側上
部全域にNi又はNi合金めっきを形成すると、銅製又
は銅合金製の母材が酸化して脆くなるのを防止できる。
なお、前記隣接部分に形成されたNi又はNi合金めっ
きの上にCrめっきを形成することも可能である。ま
た、前記溶射皮膜層やNi又はNi合金めっきの厚み
を、長片や短片の上部より下部にかけて厚くしていく
と、鋳片に対する耐摩耗性を向上できる。In addition, the Ni or Ni alloy plating is formed not only on the inner upper portion of the long piece and adjacent to the inner lower portion, but also on the inner upper portion of the short piece and adjacent to the inner lower portion. It may be formed on the inner upper part of the piece, or over the entire inner upper part of the short piece. At this time, Ni or N
When the i-alloy plating is formed, it is possible to prevent local abrasion due to the difference in hardness from occurring at the boundary between the inner upper part of the long piece or the short piece and the thermal spray coating layer. When Ni or Ni alloy plating is formed on the base material, the copper or copper alloy base material can be prevented from being oxidized and brittle.
It is also possible to form a Cr plating on the Ni or Ni alloy plating formed on the adjacent portion. Also, when the thickness of the thermal spray coating layer or the Ni or Ni alloy plating is increased from the upper part to the lower part of the long piece or the short piece, the wear resistance to the cast piece can be improved.
【0014】従って、請求項1〜3記載の連続鋳造用鋳
型においては、長片の内側下部や、短片の内側下部に、
緻密で硬い自溶性合金の第1、第2の溶射皮膜層を形成
したので、鋳片に依る摩耗を防止して、鋳型の長寿命化
が図れると共に、前記摩耗に依る鋳片の寸法精度の低
下、鋳片品質の低下を防止して歩留りを向上できる。ま
た、長片の両内側側部にも、緻密で硬い自溶性合金の第
1の溶射皮膜層を形成したので、連続鋳造時の短片の膨
張・収縮に依る押し疵や擦り疵の発生を防止できると共
に、この押し疵や擦り疵に依る拘束性ブレークアウト等
の発生を防止して、安定操業を可能にできるほか、鋳片
品質が低下して歩留りが低下するのを防止できる。ま
た、上述した部位に、予め適当な粗面化処理を施すと、
付着が良く、脱落の生じ難い第1、第2の溶射皮膜層と
なることはいうまでもない。Therefore, in the continuous casting mold according to claims 1 to 3, the inner lower part of the long piece and the inner lower part of the short piece are
Since the first and second sprayed coating layers of a dense and hard self-fluxing alloy are formed, wear due to the cast piece can be prevented, the life of the mold can be extended, and the dimensional accuracy of the cast piece due to the wear can be improved. The yield can be improved by preventing a decrease in cast iron slab quality. In addition, since the first sprayed coating layer of a dense and hard self-fluxing alloy is formed on both inner side parts of the long piece, the occurrence of press flaws and abrasion flaws due to expansion and contraction of the short piece during continuous casting is prevented. In addition to this, it is possible to prevent the occurrence of restraint breakouts or the like due to the pressing flaws and the rubbing flaws, thereby enabling stable operation, and also prevent the slab quality from lowering and the yield from lowering. In addition, when the above-mentioned portion is subjected to an appropriate roughening process in advance,
It goes without saying that the first and second thermal spray coating layers have good adhesion and are hard to fall off.
【0015】特に、請求項2記載の連続鋳造用鋳型にお
いては、長片の内側上部で、しかも、第1の溶射皮膜層
(即ち、両内側側部、及び内側下部)に隣接する部分
や、短片の内側上部で、しかも、第2の溶射皮膜層(即
ち、内側下部)に隣接する部分に、前記長片や短片の母
材の表面硬度と、前記第1、第2の溶射皮膜層の表面硬
度の中間の表面硬度を有するNi又はNi合金めっきを
形成したので、溶鋼を連続鋳造する際、凝固した鋳片殻
を連続的に下方に引き抜くとき、母材と第1、第2の溶
射皮膜層の硬さの違いにより、上述した隣接部分に局部
摩耗が発生するのを防止することができる。更に、請求
項3記載の連続鋳造用鋳型においては、長片や短片の内
側上部の表層に、Crめっきを形成したので、母材が酸
化して脆くなるのを防止することができ、更に、長寿命
化を図ることができる。[0015] In particular, in the continuous casting mold according to the second aspect, a portion adjacent to the first sprayed coating layer (that is, both inner side portions and the inner lower portion) on the inner upper portion of the long piece, On the inner upper portion of the short piece and at a portion adjacent to the second sprayed coating layer (that is, the inner lower portion), the surface hardness of the base material of the long piece or the short piece and the first and second sprayed coating layers Since Ni or Ni alloy plating having a surface hardness in the middle of the surface hardness is formed, when continuously casting molten steel, when the solidified slab shell is continuously pulled down, the base material and the first and second thermal spraying are performed. Due to the difference in hardness of the coating layer, it is possible to prevent the occurrence of local wear in the above-described adjacent portion. Further, in the continuous casting mold according to the third aspect, since the Cr layer is formed on the upper inner surface of the long piece or the short piece, it is possible to prevent the base material from being oxidized and brittle, and The service life can be extended.
【0016】[0016]
【発明の実施の形態】続いて、添付した図面を参照しつ
つ、本発明を具体化した実施の形態につき説明し、本発
明の理解に供する。なお、各実施の形態につき同様な構
成については同一の符号を付して説明を省略する。 (第1の実施の形態)まず、図1〜図3を参照して、本
発明の第1の実施の形態に係る連続鋳造用鋳型Aについ
て説明する。本実施の形態に係る連続鋳造用鋳型Aが、
従来の連続鋳造用鋳型Hと異なるのは、図示するよう
に、それぞれの短片15、15aが摺動当接する各長片
11、11aの両内側側部12aと、凝固した鋳片殻
(図示せず)が摺動当接する内側下部12bに、それぞ
れ、Ni、Cr、Si、B等の一種又は二種以上の自溶
性合金粉末を溶射してなる厚み(t3 、t4 )0.1〜
2mm、表面硬度Hv600以上の第1の溶射皮膜層1
3、14をそれぞれ形成した点と、各短片15、15a
の内側下部16aにも、Ni、Cr、Si、B等の一種
又は二種以上の自溶性合金粉末を溶射してなる厚み(t
7 )0.1〜2mm、表面硬度Hv600以上の第2の
溶射皮膜層17をそれぞれ形成した点である。なお、本
実施の形態では、第1の溶射皮膜層13の横幅(L4 )
は、それぞれ、各短片15、15aの摺動範囲とし、第
1、第2の溶射皮膜層14、17の縦幅(L5 、L6 )
は、各長片11、11a、及び、各短片15、15aの
全高(L1 )の1/5〜3/5とした。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. Note that the same reference numerals are given to the same components in each embodiment, and the description will be omitted. (First Embodiment) First, a continuous casting mold A according to a first embodiment of the present invention will be described with reference to FIGS. The continuous casting mold A according to the present embodiment,
The difference from the conventional continuous casting mold H is that, as shown in the figure, the inner side portions 12a of the long pieces 11, 11a on which the short pieces 15, 15a slide and abut, and the solidified slab shell (shown in the figure). the inner lower 12b not) are in contact with the sliding person, respectively, Ni, Cr, Si, B, etc. of one or more kinds of self-fluxing alloy powder formed by spraying the thickness (t 3, t 4) 0.1~
2 mm, first thermal spray coating layer 1 having a surface hardness of Hv 600 or more
3 and 14, respectively, and each short piece 15, 15a
Is formed by spraying one or more self-fluxing alloy powders of Ni, Cr, Si, B, etc.
7 ) The second spray coating layer 17 having a thickness of 0.1 to 2 mm and a surface hardness Hv of 600 or more is formed. In the present embodiment, the width (L 4 ) of the first sprayed coating layer 13
Is the sliding range of each of the short pieces 15 and 15a, and the vertical width (L 5 , L 6 ) of the first and second sprayed coating layers 14 and 17 respectively.
Was set to 5〜 to 全 of the total height (L 1 ) of each of the long pieces 11, 11a and each of the short pieces 15, 15a.
【0017】次に、図1、図2、図3を参照して、上述
した構成を有する連続鋳造用鋳型Aの製造方法について
説明する。初めに、長片11の製造方法について説明す
る。まず、銅製又は銅合金製の母材12の両内側側部1
2a、及び、内側下部12bを、図示しない平面研削機
で約0.1〜2mm程度削り取った後、有機溶剤を用い
て脱脂し、その後、ブラスト処理による粗面化処理を行
う。この際、表面粗度Rzは50〜150μmの範囲で
選択する。これは、表面粗度Rzを50μm未満とする
と、表面が滑らか過ぎて溶射皮膜の密着力が10kg/
cm2 以下と小さくなり、表面粗度Rzが150μmを
超えると、溶射皮膜の表面粗度が大きくなって離型性が
悪くなるからである。また、この場合、ブラスト材(グ
リッド)としては、アルミナ、スチール、サンド等が使
用できるが、中でもアルミナがよい。溶射皮膜の投錨効
果を大きくできるからである。そして、上述した粗面化
処理を行った部位に、図4に示すように、自溶性合金粉
末を好ましくは高速火炎溶射機18を用いて、内側上部
12cと面一になるよう、第1の溶射皮膜層13、14
を形成する。Next, a method of manufacturing the continuous casting mold A having the above-described structure will be described with reference to FIGS. First, a method for manufacturing the long piece 11 will be described. First, both inner side portions 1 of a copper or copper alloy base material 12 are formed.
2a and the inner lower portion 12b are scraped off by about 0.1 to 2 mm using a surface grinder (not shown), degreased using an organic solvent, and then subjected to a blasting-based roughening treatment. At this time, the surface roughness Rz is selected in the range of 50 to 150 μm. This is because if the surface roughness Rz is less than 50 μm, the surface is too smooth and the adhesion of the sprayed coating is 10 kg /
cm 2 or less and decreases, the surface roughness Rz is more than 150 [mu] m, because releasability and surface roughness of the thermal spray coating is increased is deteriorated. In this case, as the blast material (grid), alumina, steel, sand or the like can be used, and among them, alumina is preferable. This is because the effect of anchoring the sprayed coating can be increased. Then, as shown in FIG. 4, the first self-fluxing alloy powder is preferably applied to the portion subjected to the surface roughening treatment by using a high-speed flame spraying machine 18 so as to be flush with the inner upper portion 12c. Thermal spray coating layers 13, 14
To form
【0018】この際、前記高速火炎溶射は、灯油(ケロ
シン)を燃料とし、酸素を用いて化合させて2400〜
2700℃の高温で、2500〜2700m/秒の高速
ガスジェットを作り、これに自溶性合金粉末を乗せて溶
融させて、高速度(例えば、約750m/秒)で溶射材
料を母材12の両内側側部12a、内側下部12bに吹
き付けて凝固・接合させる。この場合、溶射する自溶性
合金粉末の粒度は、10〜50μmの範囲で選定する。
これは、例えば、自溶性合金粉末の粒度が10μm未満
の場合には、製造価格が高騰すると共に、溶射される自
溶性合金粉末の運動量が小さくなって、自溶性合金粉末
が気流に流され易くなり、逆に、50μmを超えると、
溶射皮膜が粗くなって実質的強度が落ちる傾向が現れる
からである。また、短片15を製造する場合は、まず、
母材16の内側下部16aを、前記と同様、図示しない
平面研削機で約0.1〜2mm程度削り取った後、この
研削した内側下部16aに粗面化処理を行う。そして、
前記と同様、好ましくは高速火炎溶射機18(図4参
照)を用いて、内側上部16bと面一になるよう、前記
と同じ溶射条件で、第2の溶射皮膜層17を形成する。
なお、長片11a、短片15aの製造方法は、前記長片
11、短片15と同様なものなので、説明を省略する。At this time, the high-speed flame spraying is performed by using kerosene (kerosene) as a fuel and combining it with oxygen to obtain 2400 to 2400.
At a high temperature of 2700 ° C., a high-speed gas jet of 2500 to 2700 m / sec is made, and the self-fluxing alloy powder is put on the jet and melted, and the sprayed material is mixed with the base material 12 at a high speed (for example, about 750 m / sec). It is solidified and joined by spraying the inner side portion 12a and the inner lower portion 12b. In this case, the particle size of the self-fluxing alloy powder to be sprayed is selected in the range of 10 to 50 μm.
This is because, for example, when the particle size of the self-fluxing alloy powder is less than 10 μm, the manufacturing cost rises and the momentum of the sprayed self-fluxing alloy powder becomes small, so that the self-fluxing alloy powder is easily flowed into the airflow. Conversely, if it exceeds 50 μm,
This is because the thermal sprayed coating tends to be coarse and the strength tends to be substantially reduced. When manufacturing the short piece 15, first,
After the inner lower part 16a of the base material 16 is scraped off by about 0.1 to 2 mm using a surface grinder (not shown), the ground lower part 16a is subjected to a surface roughening treatment. And
Similarly to the above, the second thermal spray coating layer 17 is formed under the same thermal spraying conditions as described above, preferably using a high-speed flame spraying machine 18 (see FIG. 4) so as to be flush with the inner upper portion 16b.
The manufacturing method of the long piece 11a and the short piece 15a is the same as that of the long piece 11 and the short piece 15, and the description thereof will be omitted.
【0019】以上のように本実施の形態に係る連続鋳造
用鋳型Aによれば、長片11、11aの両内側側部12
aと内側下部12bに、それぞれ、自溶性合金の第1の
溶射皮膜層13、14を形成すると共に、短片15、1
5aの内側下部16aにも、自溶性合金の第2の溶射皮
膜層17を形成したので、押し疵や擦り疵の発生を防止
することができ、連続鋳造用鋳型Aの長寿命化を図るこ
とができる。また、例えば、プラズマ溶射等に比べ、火
炎速度の速い高速火炎溶射を適用した場合は、上述した
部位に形成された第1、第2の溶射皮膜層13、14、
17の密度を高めることができ、更に長寿命化を図るこ
とができる。As described above, according to the continuous casting mold A according to the present embodiment, both inner side portions 12 of the long pieces 11 and 11a are formed.
a and the lower inner portion 12b, first spray coating layers 13, 14 of a self-fluxing alloy are formed,
Since the second sprayed coating layer 17 of the self-fluxing alloy is also formed on the inner lower portion 16a of the 5a, it is possible to prevent the occurrence of press flaws and scratches, and to extend the life of the continuous casting mold A. Can be. Further, for example, when high-speed flame spraying, which has a higher flame speed than plasma spraying or the like, is applied, the first and second sprayed coating layers 13, 14,
17 can be increased, and the service life can be further extended.
【0020】(第2の実施の形態)次に、図1、図5、
図6を参照して、本発明の第2の実施の形態に係る連続
鋳造用鋳型Bについて説明する。本実施の形態に係る連
続鋳造用鋳型Bが、前記連続鋳造用鋳型Aと異なるの
は、図示するように、各長片20、20aの内側上部1
2cで、しかも第1の溶射皮膜層14に隣接する帯状部
分12eに、母材21の表面硬度(約Hv100程度)
と第1の溶射皮膜層13、14の表面硬度(Hv600
以上)の中間の表面硬度(本実施の形態ではHv200
程度)を有する厚み(t8 、t5 )0.1〜2mmのN
iめっき22をそれぞれ形成した点と、各短片23、2
3aの内側上部16bで、しかも第2の溶射皮膜層17
と隣接する帯状部分16cにも、母材24の表面硬度
(約Hv100程度)と第2の溶射皮膜層17の表面硬
度(Hv600以上)の中間の表面硬度(本実施の形態
では約Hv200程度)を有する厚み(t9 )0.1〜
2mmのNiめっき25をそれぞれ形成した点である。
なお、本実施の形態では、各Niめっき22、25の縦
幅(L7 、L8 )は、各長片20、20a、及び、各短
片23、23aの内側上部12c、16bの縦幅
(L20、L21)の1/10〜3/10とした。(Second Embodiment) Next, FIGS.
A continuous casting mold B according to a second embodiment of the present invention will be described with reference to FIG. The continuous casting mold B according to the present embodiment is different from the continuous casting mold A as shown in FIG.
2c, the surface hardness (approximately Hv100) of the base material 21 is formed on the strip-shaped portion 12e adjacent to the first sprayed coating layer 14.
And the surface hardness of the first sprayed coating layers 13 and 14 (Hv600
Surface hardness (Hv 200 in the present embodiment)
Thickness having a degree) (t 8, t 5) 0.1~2mm of N
The point where each of the i-plates 22 was formed and the short pieces 23, 2
3a, and the second sprayed coating layer 17
Also, the belt-like portion 16c adjacent to the surface hardness of the base material 24 (about Hv100) and the surface hardness of the second sprayed coating layer 17 (Hv600 or more) are intermediate (about Hv200 in the present embodiment). Having a thickness (t 9 ) of 0.1 to 0.1
The point is that 2 mm of Ni plating 25 was formed.
In the present embodiment, the vertical width (L 7 , L 8 ) of each of the Ni platings 22, 25 is determined by the vertical width (L 7 , L 8 ) of each of the long pieces 20, 20 a and the inner upper portions 12 c, 16 b of each of the short pieces 23, 23 a. L 20 , L 21 ).
【0021】次に、図1、図5、図6を参照して、上述
した構成を有する連続鋳造用鋳型Bの製造方法について
説明する。初めに、長片20の製造方法について説明す
る。まず、母材21の両内側側部12a、内側下部12
b、及び帯状部分12eを、図示しない平面研削機で約
0.1〜2mm程度削り取った後、12eの部位に、非
研削部位(内側上部)と面一になるよう、Niめっきを
形成する。この際のめっき条件としては例えば、水1リ
ットル中に、S−Ni(スルファミン酸Ni)を350
g、塩化Niを5g、硼酸を30g溶かした電解液を使
用し、液温45〜60℃、電流密度3A/dm2 で行う
ことができる。そして、両内側側部12a、及び、内側
下部12bのNiめっき22との境界部分又は全部を、
前記と同様、図示しない平面研削機で表面から約0.1
〜2mm程度研削する。これによりNiめっき22と後
述の溶射皮膜の境界面が形成される。次に、この研削部
位を粗面化した後、前記と同様、好ましくは高速火炎溶
射機18(図4参照)を用いて、内側上部12cと面一
になるよう、前記と同じ溶射条件で、第1の溶射皮膜層
13、14を形成する。そして、最後に溶射後は12
a、12b、12c、12eを含む全面を面一に研削加
工する。また、短片23を製造する場合は、まず、母材
24の内側下部16a、及び帯状部分16cを、図示し
ない平面研削機で約0.1〜2mm程度削り取った後、
16cの部位に、非研削部位(内側上部)と面一になる
よう、前記と同じめっき条件で、Niめっきを形成す
る。Next, with reference to FIGS. 1, 5, and 6, a method of manufacturing the continuous casting mold B having the above-described configuration will be described. First, a method for manufacturing the long piece 20 will be described. First, both inner side portions 12a and inner lower portion 12 of the base material 21 are formed.
After the b and the band-shaped portion 12e are scraped off by about 0.1 to 2 mm using a surface grinder (not shown), Ni plating is formed on the portion 12e so as to be flush with the non-ground portion (upper portion inside). As plating conditions at this time, for example, 350 liters of S-Ni (Ni sulfamate) in 1 liter of water is used.
g, 5 g of Ni chloride and 30 g of boric acid are used at an electrolyte temperature of 45 to 60 ° C. and a current density of 3 A / dm 2 . Then, both or both of the inner side portions 12a and the boundary portion or the entirety of the inner lower portion 12b with the Ni plating 22 are
In the same manner as described above, a surface grinder not shown
Grind about 2 mm. As a result, an interface between the Ni plating 22 and the thermal spray coating described later is formed. Next, after roughening the ground portion, similarly to the above, preferably using the high-speed flame spraying machine 18 (see FIG. 4), the same spraying conditions as above are used, so that the surface becomes flush with the inner upper portion 12c. First thermal spray coating layers 13 and 14 are formed. And finally after spraying 12
The entire surface including a, 12b, 12c, and 12e is ground and ground. In the case of manufacturing the short piece 23, first, the inner lower part 16a of the base material 24 and the strip-shaped part 16c are scraped off by about 0.1 to 2 mm by a plane grinder (not shown).
At the portion 16c, Ni plating is formed under the same plating conditions as described above so as to be flush with the non-ground portion (upper portion inside).
【0022】そして、内側下部16aのNiめっき25
との境界部分又は全部を、前記と同様、平面研削機で表
面から約0.1〜2mm程度研削する。これによりNi
めっき25と後述の溶射皮膜の境界面が形成される。次
に、この研削部位を粗面化した後、前記と同様、好まし
くは高速火炎溶射機18(図4参照)を用いて、内側上
部16bと面一になるよう、前記と同じ溶射条件で、第
2の溶射皮膜層17を形成する。溶射後に16a、16
b、16cを含む全面を面一に研削加工する。なお、長
片20a、短片23aの製造方法も、前記長片20、短
片23と同様なものなので、説明を省略する。以上のよ
うに本実施の形態に係る連続鋳造用鋳型Bによれば、本
発明の第1の実施の形態と同様の効果が得られる他、長
片20、20aの内側上部12cで、しかも、第1の溶
射皮膜層14に隣接する帯状部分12eや、短片23、
23aの内側上部16bで、しかも、第2の溶射皮膜層
17と隣接する帯状部分16cに、それぞれ、母材2
1、24と第1、第2の溶射皮膜層13、14、17の
中間の表面硬度を有するNiめっき22、25を形成し
たので、長片20、20aや短片23、23aの内側上
部12c、16bより、内側下部12b、16aに亘っ
て、硬さの不連続性に起因する局部摩耗の発生を防止す
ることができる。Then, the Ni plating 25 on the inner lower portion 16a is formed.
Or the whole of the boundary portion is ground by about 0.1 to 2 mm from the surface by a surface grinder in the same manner as described above. This allows Ni
An interface between the plating 25 and the thermal spray coating described later is formed. Next, after roughening the ground portion, similarly to the above, preferably using a high-speed flame spraying machine 18 (see FIG. 4), the same spraying conditions as above are used, so as to be flush with the inner upper portion 16b. The second thermal spray coating layer 17 is formed. 16a, 16 after thermal spraying
The entire surface including b and 16c is ground. In addition, since the manufacturing method of the long piece 20a and the short piece 23a is the same as that of the long piece 20 and the short piece 23, the description is omitted. As described above, according to the continuous casting mold B according to the present embodiment, the same effect as that of the first embodiment of the present invention can be obtained, and the inner upper portion 12c of each of the long pieces 20, 20a, and The strip portion 12e adjacent to the first sprayed coating layer 14, the short piece 23,
The base material 2 is formed on the inner upper portion 16b of the base member 23a and on the strip-like portion 16c adjacent to the second sprayed coating layer 17, respectively.
Ni platings 22 and 25 having a surface hardness intermediate between the first and second spray coating layers 13, 14 and 17 are formed on the inner upper portions 12 c of the long pieces 20 and 20 a and the short pieces 23 and 23 a. From 16b, it is possible to prevent the occurrence of local wear due to the discontinuity in hardness over the inner lower portions 12b and 16a.
【0023】(第3の実施の形態)次に、図1、図7を
参照して、本発明の第3の実施の形態に係る連続鋳造用
鋳型Cについて説明する。本実施の形態に係る連続鋳造
用鋳型Cが、前記連続鋳造用鋳型Aと異なるのは、図示
するように、各長片26、26aの内側上部12cで、
しかも、第1の溶射皮膜層13に隣接するI字状部分1
2fに、それぞれ、母材27の表面硬度(約Hv100
程度)と第1の溶射皮膜層13、14の表面硬度(Hv
600以上)の中間の表面硬度(本実施の形態ではHv
200程度)を有する厚み(t10、t5 )0.1〜2m
mのNiめっき28をそれぞれ形成した点である。な
お、本実施の形態では、各Niめっき28の横幅
(L9 )は、各長片26、26aの内側上部12cの横
幅(L22)の1/10〜3/10とした。また、短片
は、前記連続鋳造用鋳型Bの短片23、23aと同様な
ものなので説明を省略する。(Third Embodiment) Next, a continuous casting mold C according to a third embodiment of the present invention will be described with reference to FIGS. The continuous casting mold C according to the present embodiment is different from the continuous casting mold A, as shown in the drawing, in the upper inner portion 12c of each of the long pieces 26, 26a,
Moreover, the I-shaped portion 1 adjacent to the first thermal spray coating layer 13
2f, the surface hardness of the base material 27 (about Hv100
Degree) and the surface hardness (Hv) of the first sprayed coating layers 13 and 14.
600 or more (in this embodiment, Hv
Thickness with about 200) (t 10, t 5 ) 0.1~2m
This is the point where m Ni plating 28 was formed. In the present embodiment, the width (L 9 ) of each Ni plating 28 is set to 1/10 to 3/10 of the width (L 22 ) of the inner upper portion 12c of each of the long pieces 26, 26a. The short pieces are the same as the short pieces 23 and 23a of the continuous casting mold B, and the description thereof will be omitted.
【0024】次に、図7を参照して、上述した構成を有
する連続鋳造用鋳型Cの長片26の製造方法について説
明する。まず、母材27の両内側側部12a、内側下部
12b、及びI字状部分12fを、図示しない平面研削
機で約0.1〜2mm程度削り取った後、12fの部位
に、非研削部位(内側上部)と面一になるよう、前記と
同じめっき条件で、Niめっきを形成する。そして、両
内側側部12a、及び、内側下部12bのNiめっき2
8との境界部分又は全部を、前記と同様、図示しない平
面研削機で表面から約0.1〜2mm程度研削する。こ
れによりNiめっき28と、後述の溶射皮膜の境界面が
形成される。次に、この研削部位を粗面化した後、前記
と同様、好ましくは高速火炎溶射機18(図4参照)を
用いて、内側上部12cと面一になるよう、前記と同じ
溶射条件で、第1の溶射皮膜層13、14を形成する。
そして、最後に溶射後は12a、12b、12c、12
fを含む全面を面一に研削加工する。なお、長片26a
の製造方法は前記と同様なものなので説明を省略する。Next, a method of manufacturing the long piece 26 of the continuous casting mold C having the above-described configuration will be described with reference to FIG. First, the inner side portion 12a, the inner lower portion 12b, and the I-shaped portion 12f of the base material 27 are scraped off by about 0.1 to 2 mm with a plane grinding machine (not shown), and then the non-ground portion ( Ni plating is formed under the same plating conditions as described above so as to be flush with the upper part (inner side). And Ni plating 2 of both inner side parts 12a and inner lower part 12b
8 or about 0.1 to 2 mm from the surface by a surface grinder (not shown) in the same manner as described above. As a result, an interface between the Ni plating 28 and the thermal spray coating described later is formed. Next, after roughening the ground portion, similarly to the above, preferably using the high-speed flame spraying machine 18 (see FIG. 4), the same spraying conditions as above are used, so that the surface becomes flush with the inner upper portion 12c. First thermal spray coating layers 13 and 14 are formed.
Finally, after thermal spraying, 12a, 12b, 12c, 12
Grind the entire surface including f. The long piece 26a
The manufacturing method is the same as that described above, and the description is omitted.
【0025】以上のように本実施の形態に係る連続鋳造
用鋳型Cによれば、本発明の第1の実施の形態と同様の
効果が得られる他、長片26、26aの内側上部12c
で、しかも、両内側側部12aに隣接するI字状部分1
2fに、それぞれ、母材27と第1の溶射皮膜層13、
14の中間の表面硬度を有するNiめっき28を形成し
たので、前記内側上部12cと前記両内側側部12aの
境界部分すなわちI字状部分12fに、母材27と第1
の溶射皮膜層13の熱伝導率の差に起因するヒートクラ
ック、及び第1の溶射皮膜層13の剥離が生じるを防止
できる。As described above, according to the continuous casting mold C of the present embodiment, the same effects as those of the first embodiment of the present invention can be obtained, and the inner upper portion 12c of the long pieces 26, 26a can be obtained.
And the I-shaped portion 1 adjacent to both inner side portions 12a.
2f, the base material 27 and the first sprayed coating layer 13,
Since the Ni plating 28 having an intermediate surface hardness of 14 is formed, the base material 27 and the first material 12 are formed at the boundary between the inner upper part 12c and the inner side parts 12a, that is, the I-shaped part 12f.
In this case, it is possible to prevent heat cracks due to the difference in thermal conductivity between the thermal spray coating layers 13 and peeling of the first thermal spray coating layer 13.
【0026】(第4の実施の形態)次に、図1、図8を
参照して、本発明の第4の実施の形態に係る連続鋳造用
鋳型Dについて説明する。本実施の形態に係る連続鋳造
用鋳型Dが、前記連続鋳造用鋳型Aと異なるのは、図示
するように、各長片30、30aの内側上部12cで、
しかも、第1の溶射皮膜層13、14に隣接するU字状
部分12dに、母材31の表面硬度(約Hv100程
度)と第1の溶射皮膜層13、14の表面硬度(Hv6
00以上)の中間の表面硬度(本実施の形態ではHv2
00程度)を有する厚み(t8 、t10、t5 )0.1〜
2mmのNiめっき32をそれぞれ形成した点である。
なお、本実施の形態では、各Niめっき32の縦幅(L
7 )は、各長片30、30aの内側上部12cの縦幅
(L20)の1/10〜3/10、各Niめっき32の横
幅(L9 )は、各長片30、30aの内側上部12cの
横幅(L22)の1/10〜3/10とした。また、短片
は、前記連続鋳造用鋳型Bの短片23、23aと同様な
ものなので、説明を省略する。(Fourth Embodiment) Next, a continuous casting mold D according to a fourth embodiment of the present invention will be described with reference to FIGS. The continuous casting mold D according to the present embodiment is different from the continuous casting mold A, as shown, in the inner upper portion 12c of each of the long pieces 30, 30a.
In addition, the surface hardness (about Hv100) of the base material 31 and the surface hardness (Hv6) of the first sprayed coating layers 13 and 14 are provided on the U-shaped portion 12d adjacent to the first sprayed coating layers 13 and 14.
00 surface hardness (Hv2 in this embodiment)
Thickness (t 8 , t 10 , t 5 ) 0.1 to 0.1
The point is that 2 mm of Ni plating 32 was formed.
Note that, in the present embodiment, the vertical width (L
7 ) is 1/10 to 3/10 of the vertical width (L 20 ) of the inner upper portion 12c of each long piece 30, 30a, and the horizontal width (L 9 ) of each Ni plating 32 is the inside of each long piece 30, 30a. It was 1 / 10-3 / 10 of the width of the upper 12c (L 22). Further, the short pieces are the same as the short pieces 23 and 23a of the continuous casting mold B, and thus the description thereof is omitted.
【0027】次に、図8を参照して、上述した構成を有
する連続鋳造用鋳型Dの長片30の製造方法について説
明する。まず、母材31の両内側側部12a、内側下部
12b、及びU字状部分12dを、図示しない平面研削
機で約0.1〜2mm程度削り取った後、12dの部位
に、非研削部位(内側上部)と面一になるよう、前記と
同じめっき条件で、Niめっきを形成する。そして、両
内側側部12a、及び、内側下部12bのNiめっき3
2との境界部分又は全部を、前記と同様、図示しない平
面研削機で表面から約0.1〜2mm程度研削する。こ
れによりNiめっき32と、後述する溶射皮膜の境界面
が形成される。次に、この研削部位を粗面化した後、前
記と同様、好ましくは高速火炎溶射機18(図4参照)
を用いて、内側上部12cと面一になるよう、前記と同
じ溶射条件で、第1の溶射皮膜層13、14を形成す
る。そして、最後に溶射後は12a、12b、12c、
12dを含む全面を面一に研削加工する。なお、長片3
0aの製造方法は前記と同様なものなので説明を省略す
る。Next, a method of manufacturing the long piece 30 of the continuous casting mold D having the above-described configuration will be described with reference to FIG. First, both inner side portions 12a, the inner lower portion 12b, and the U-shaped portion 12d of the base material 31 are scraped off by about 0.1 to 2 mm with a plane grinding machine (not shown), and then the non-ground portion ( Ni plating is formed under the same plating conditions as described above so as to be flush with the upper part (inner side). And Ni plating 3 of both inner side parts 12a and inner lower part 12b
Similarly to the above, the boundary portion or the whole with 2 is ground about 0.1 to 2 mm from the surface by a surface grinder (not shown). As a result, a boundary surface between the Ni plating 32 and the thermal spray coating described later is formed. Next, after roughening the ground portion, similarly to the above, preferably a high-speed flame spraying machine 18 (see FIG. 4)
The first thermal spray coating layers 13 and 14 are formed under the same thermal spray conditions as described above so as to be flush with the inner upper portion 12c. And finally after spraying 12a, 12b, 12c,
The entire surface including 12d is ground and ground. In addition, long piece 3
Since the method of manufacturing Oa is the same as described above, the description is omitted.
【0028】以上のように本実施の形態に係る連続鋳造
用鋳型Dによれば、本発明の第1の実施の形態と同様の
効果が得られる他、長片30、30aの内側上部12c
で、しかも、第1の溶射皮膜層13、14に隣接するU
字状部分12dに、それぞれ、Niめっき32を形成し
たので、本発明の第2、第3の実施の形態と同様、長片
30、30aの内側上部12cより、内側下部12bに
亘って、硬さの不連続性に起因する局部摩耗の発生を防
止できると共に、母材31と第1の溶射皮膜層13の熱
伝導率の差に起因するヒートクラック、及び第1の溶射
皮膜層13の剥離の発生を防止できる。As described above, according to the continuous casting mold D according to the present embodiment, the same effects as those of the first embodiment of the present invention can be obtained, and the inner upper portion 12c of the long pieces 30, 30a can be obtained.
And the U adjacent to the first sprayed coating layers 13 and 14
Since Ni plating 32 was formed on each of the letter-shaped portions 12d, hardening was performed from the inner upper part 12c of the long pieces 30, 30a to the inner lower part 12b, similarly to the second and third embodiments of the present invention. Generation of local wear due to the discontinuity of the thermal spraying, heat cracks due to the difference in thermal conductivity between the base material 31 and the first thermal spray coating layer 13, and peeling of the first thermal spray coating layer 13 can be prevented. Can be prevented.
【0029】(第5の実施の形態)次に、図1、図9、
図10を参照して、本発明の第5の実施の形態に係る連
続鋳造用鋳型Eについて説明する。本実施の形態に係る
連続鋳造用鋳型Eが、前記連続鋳造用鋳型Aと異なるの
は、図示するように、各長片34、34aの内側上部1
2c全面に厚み(t11、t5 )0.1〜2mmのNiめ
っき36をそれぞれ形成すると共に、各短片37、37
aの内側上部16b全面にも厚み(t12)0.1〜2m
mのNiめっき39をそれぞれ形成した点である。(Fifth Embodiment) Next, FIGS.
A continuous casting mold E according to a fifth embodiment of the present invention will be described with reference to FIG. The continuous casting mold E according to the present embodiment is different from the continuous casting mold A as shown in FIG.
Thickness 2c entire (t 11, t 5) Ni plating 36 so as to form respective 0.1 to 2 mm, the short side 37, 37
The thickness (t 12 ) of the inner upper part 16b of the entire surface is 0.1 to 2 m.
This is a point that m Ni plating 39 was formed.
【0030】次に、図9、図10を参照して、上述した
構成を有する連続鋳造用鋳型Eの製造方法について説明
する。始めに、長片34の製造方法について説明する。
まず、母材35の内側全面を、図示しない平面研削機で
約0.1〜2mm程度削り取った後、12cの部位全面
に、前記と同じめっき条件で、厚み約0.1〜2mm程
度のNiめっきを形成する。そして、両内側側部12
a、及び、内側下部12bのNiめっき36との境界部
分又は全部を、前記と同様、図示しない平面研削機で表
面から約0.1〜2mm程度研削する。これによりNi
めっき36と、後述する溶射皮膜の境界面が形成され
る。次に、この研削部位を粗面化した後、前記と同様、
好ましくは高速火炎溶射機18(図4参照)を用いて、
内側上部12cと面一になるよう、前記と同じ溶射条件
で、第1の溶射皮膜層13、14を形成する。そして、
最後に溶射後は12a、12b、12cを含む全面を面
一に研削加工する。Next, a method of manufacturing the continuous casting mold E having the above-described configuration will be described with reference to FIGS. First, a method of manufacturing the long piece 34 will be described.
First, the entire inner surface of the base material 35 is scraped off by about 0.1 to 2 mm with a surface grinder (not shown), and the Ni plating with a thickness of about 0.1 to 2 mm Form plating. And both inner side portions 12
In the same manner as described above, the entirety of the boundary portion a and the inner lower portion 12b with the Ni plating 36 is ground about 0.1 to 2 mm from the surface by a surface grinder (not shown). This allows Ni
An interface between the plating 36 and the thermal spray coating described later is formed. Next, after roughening the ground portion, as described above,
Preferably, using a high-speed flame spraying machine 18 (see FIG. 4),
The first sprayed coating layers 13 and 14 are formed under the same spraying conditions as described above so as to be flush with the inner upper portion 12c. And
Finally, after the thermal spraying, the entire surface including 12a, 12b, and 12c is ground and ground.
【0031】また、短片37を製造する場合は、まず、
母材38の内側全面を、図示しない平面研削機で約0.
1〜2mm程度削り取った後、16bの部位に、前記と
同じめっき条件で、厚み約0.1〜2mm程度のNiめ
っきを形成する。そして、内側下部16aのNiめっき
39との境界部分又は全部を、前記と同様、図示しない
平面研削機で表面から約0.1〜2mm程度研削する。
これによりNiめっき39と、後述する溶射皮膜の境界
面が形成される。次に、この研削部位を粗面化した後、
前記と同様、好ましくは高速火炎溶射機18(図4参
照)を用いて、前記と同じ溶射条件で、第2の溶射皮膜
層17を形成する。そして、最後に溶射後は16a、1
6bを含む全面を面一に研削加工する。なお、長片34
a、短片37aの製造方法も、前記と同様なものなの
で、説明を省略する。When manufacturing the short piece 37, first,
The entire inner surface of the base material 38 is adjusted to about 0.
After shaving off by about 1 to 2 mm, Ni plating having a thickness of about 0.1 to 2 mm is formed on the portion 16b under the same plating conditions as described above. Then, the boundary portion or the entirety of the inner lower portion 16a with the Ni plating 39 is ground by about 0.1 to 2 mm from the surface by a surface grinder (not shown) in the same manner as described above.
As a result, a boundary surface between the Ni plating 39 and the thermal spray coating described later is formed. Next, after roughening this grinding part,
Similarly to the above, the second thermal spray coating layer 17 is formed under the same thermal spraying conditions as described above, preferably using a high-speed flame spraying machine 18 (see FIG. 4). Finally, after spraying, 16a, 1
The entire surface including 6b is ground. The long piece 34
a, the manufacturing method of the short piece 37a is the same as that described above, and the description is omitted.
【0032】以上のように本実施の形態に係る連続鋳造
用鋳型Eによれば、本発明の第1の実施の形態と同様の
効果が得られる他、長片34、34aの内側上部12
c、及び、短片37、37aの内側上部16bに、それ
ぞれ、Niめっき36、39を形成したので、母材3
5、38が酸化して脆くなるのを防止することができ、
更に、長寿命化を図ることができる。As described above, according to the continuous casting mold E according to the present embodiment, the same effects as those of the first embodiment of the present invention can be obtained, and the inner upper portion 12 of the long pieces 34, 34a can be obtained.
c, and Ni platings 36 and 39 were formed on the inner upper portions 16b of the short pieces 37 and 37a, respectively.
5, 38 can be prevented from oxidizing and becoming brittle,
Further, the service life can be extended.
【0033】(第6の実施の形態)次に、図1、図1
1、図12を参照して、本発明の第6の実施の形態に係
る連続鋳造用鋳型Fについて説明する。本実施の形態に
係る連続鋳造用鋳型Fが、前記連続鋳造用鋳型Aと異な
るのは、図示するように、各長片40、40aの内側上
部12cに、Niめっき42(厚み(t13、t14)0.
1〜2mm)、及びCrめっき43(厚み(t15)0.
02〜0.1mm)を積層すると共に、各短片44、4
4aの内側上部16bにも、Niめっき46(厚み(t
16)0.1〜2mm)、及びCrめっき47(厚み(t
17)0.02〜0.1mm)を積層した点である。(Sixth Embodiment) Next, FIGS.
1, a continuous casting mold F according to a sixth embodiment of the present invention will be described with reference to FIG. As shown, the continuous casting mold F according to the present embodiment differs from the continuous casting mold A in that the Ni plating 42 (thickness (t 13 , t 14 ) 0.
1-2 mm) and Cr plating 43 (thickness (t 15 ) 0.
02 to 0.1 mm), and each short piece 44, 4
Ni plating 46 (thickness (t)
16 ) 0.1 to 2 mm) and Cr plating 47 (thickness (t
17 ) 0.02 to 0.1 mm).
【0034】次に、図11、図12を参照して、上述し
た構成を有する連続鋳造用鋳型Fの製造方法について説
明する。初めに、長片40の製造方法について説明す
る。まず、母材41の内側全面を、図示しない平面研削
機で約0.1〜2mm程度削り取った後、12cの部位
に、前記と同じめっき条件で、厚み約0.1〜2mm程
度のNiめっきを形成する。そして、両内側側部12
a、及び、内側下部12bのNiめっき42との境界部
分又は全部を、前記と同様、図示しない平面研削機で表
面から約0.1〜2mm程度研削する。これによりNi
めっき42と、後述する溶射皮膜の境界面が形成され
る。次に、この研削部位を粗面化した後、前記と同様、
好ましくは高速火炎溶射機18(図4参照)を用いて、
前記と同じ溶射条件で、第1の溶射皮膜層13、14を
形成する。溶射後は13、14、12cのNiめっき面
を含む全面を面一に研削加工する。そして、最後に、N
iめっき42の上面を、更に表面仕上げした後、その上
面に、公知の方法によりCrめっき43を形成する。Next, a method of manufacturing the continuous casting mold F having the above-described configuration will be described with reference to FIGS. First, a method of manufacturing the long piece 40 will be described. First, the entire inner surface of the base material 41 is scraped off by about 0.1 to 2 mm with a surface grinder (not shown), and a Ni plating having a thickness of about 0.1 to 2 mm is formed on the portion 12c under the same plating conditions as described above. To form And both inner side portions 12
In the same manner as described above, the entirety of the boundary portion a and the inner lower portion 12b with the Ni plating 42 is ground about 0.1 to 2 mm from the surface by a surface grinder (not shown). This allows Ni
An interface between the plating 42 and the thermal spray coating described later is formed. Next, after roughening the ground portion, as described above,
Preferably, using a high-speed flame spraying machine 18 (see FIG. 4),
The first sprayed coating layers 13 and 14 are formed under the same spraying conditions as described above. After the thermal spraying, the entire surface including the Ni-plated surfaces 13, 14, and 12c is ground and ground. And finally, N
After the upper surface of the i-plate 42 is further finished, a Cr plating 43 is formed on the upper surface by a known method.
【0035】また、短片44を製造する場合は、まず、
母材45の内側全面を、図示しない平面研削機で約0.
1〜2mm程度削り取った後、16bの部位に、前記と
同じめっき条件で、厚み約0.1〜2mm程度のNiめ
っきを形成する。そして、内側下部16aのNiめっき
との境界部分又は全部を、前記と同様、図示しない平面
研削機で表面から約0.1〜2mm程度研削する。これ
によりNiめっき46と、後述する溶射皮膜の境界面が
形成される。次に、この研削部位を粗面化した後、前記
と同様、好ましくは高速火炎溶射機18(図4参照)を
用いて、前記と同じ溶射条件で、第2の溶射皮膜層17
を形成する。溶射後は17、16bのNiめっき面を含
む全面を面一に研削加工する。そして、最後に、Niめ
っき46の上面を更に表面仕上げした後、その上面に、
前記と同じめっき条件で、Crめっき47を形成する。
なお、長片40a、短片44aの製造方法も前記と同様
なものなので説明を省略する。When manufacturing the short piece 44, first,
The entire inner surface of the base material 45 is adjusted to about 0.
After shaving off by about 1 to 2 mm, Ni plating having a thickness of about 0.1 to 2 mm is formed on the portion 16b under the same plating conditions as described above. Then, the boundary portion or the entirety of the inner lower portion 16a with the Ni plating is ground about 0.1 to 2 mm from the surface by a surface grinder (not shown) in the same manner as described above. As a result, a boundary surface between the Ni plating 46 and the thermal spray coating described later is formed. Next, after roughening the ground portion, similarly to the above, preferably using the high-speed flame spraying machine 18 (see FIG. 4) under the same spraying conditions as above, the second sprayed coating layer 17 is formed.
To form After the thermal spraying, the entire surface including the Ni-plated surfaces 17 and 16b is ground and ground. And finally, after further finishing the upper surface of the Ni plating 46,
Under the same plating conditions as above, a Cr plating 47 is formed.
In addition, the manufacturing method of the long piece 40a and the short piece 44a is the same as that described above, and the description is omitted.
【0036】以上のように本実施の形態に係る連続鋳造
用鋳型Fによれば、本発明の第1の実施の形態と同様の
効果が得られるほか、長片40、40aや短片44、4
4aの内側上部12c、16bの表層に硬いCrめっき
43、47を形成したので、本発明の第5の実施の形態
に比較して、更に耐摩耗性を向上できる。As described above, according to the continuous casting mold F according to the present embodiment, the same effects as those of the first embodiment of the present invention can be obtained, and the long pieces 40, 40a and the short pieces 44, 4
Since the hard Cr plating 43, 47 is formed on the surface layer of the inner upper portions 12c, 16b of 4a, the abrasion resistance can be further improved as compared with the fifth embodiment of the present invention.
【0037】[0037]
【実施例】次に、図1〜図12を参照して、本実施の形
態に係る連続鋳造様鋳型A〜Fの耐摩耗性の確認試験を
行った結果について説明する。 (実施例1〜7、比較例1〜3)まず、図1〜図12に
示す連続鋳造用鋳型A〜F(実施例1〜6)を準備す
る。この際、長片と短片の縦幅(L1 )、長片の横幅
(L2 )、短片の横幅(L3)、長片と短片の最大厚み
(t1 、t2 )は表1、表2に示す通りとし、また、長
片の内面と短片の両側面の曲率半径(φ)は10500
mmとした。Next, the results of a test for confirming the wear resistance of the continuous casting molds A to F according to the present embodiment will be described with reference to FIGS. (Examples 1 to 7, Comparative Examples 1 to 3) First, continuous casting molds A to F (Examples 1 to 6) shown in FIGS. 1 to 12 are prepared. At this time, the longitudinal width (L 1 ) of the long piece and the short piece, the lateral width (L 2 ) of the long piece, the lateral width (L 3 ) of the short piece, and the maximum thickness (t 1 , t 2 ) of the long piece and the short piece are shown in Table 1, The radius of curvature (φ) of the inner surface of the long piece and both side surfaces of the short piece is 10500 as shown in Table 2.
mm.
【0038】また、長片の第1の溶射皮膜層13の横幅
(L4 )、その上、下端の厚み(t3 、t4 )、また、
第1の溶射皮膜層14の縦幅(L5 )、その上、下端の
厚み(t5 、t6 )、更に、短片の第2の溶射皮膜層1
7の縦幅(L6 )、その上、下端に亘って一様な厚み
(t7 )も、表1、表2に示す通りとした。The width (L 4 ) of the long thermal spray coating layer 13, and the thickness of the lower end (t 3 , t 4 ), and
The vertical width (L 5 ) of the first sprayed coating layer 14, the thickness of the lower end (t 5 , t 6 ), and the short sprayed second sprayed coating layer 1
7 of the longitudinal width (L 6), on which a uniform thickness over the lower end (t 7) also, Table 1, were as shown in Table 2.
【0039】なお、長片と短片の第1、第2の溶射皮膜
層13、14、17の化学組成は、表3に示す通りとす
る。The chemical compositions of the first and second thermal spray coating layers 13, 14, 17 of the long piece and the short piece are as shown in Table 3.
【0040】[0040]
【表1】 [Table 1]
【0041】[0041]
【表2】 [Table 2]
【0042】[0042]
【表3】 [Table 3]
【0043】また、図1、図5、図6に示す連続鋳造用
鋳型B(実施例2)においては、長片20、20aのN
iめっき22の縦幅(L7 )は50mm、その上、下端
の厚み(t8 、t5 )は、それぞれ、0.5mm、0.
5mm(表2参照)、また、短片23、23aのNiめ
っき25の縦幅(L8 )は50mm、その上、下端に亘
って一様な厚み(t9 )は0.5mmとした。Also, in the continuous casting mold B (Example 2) shown in FIGS.
The vertical width (L 7 ) of the i-plate 22 is 50 mm, and the thicknesses (t 8 , t 5 ) of the upper and lower ends thereof are 0.5 mm, 0.
5 mm (see Table 2), the vertical width (L 8 ) of the Ni plating 25 of the short pieces 23 and 23a was 50 mm, and the uniform thickness (t 9 ) was 0.5 mm over the upper and lower ends.
【0044】また、図1、図6、図7に示す連続鋳造用
鋳型C(実施例3)においては、長片26、26aのN
iめっき28の横幅(L9 )は50mm、その上、下端
の厚み(t10、t5 )は、それぞれ、0.5mm、0.
5mm(表2参照)とした。なお、短片23、23aの
Niめっき25の縦幅(L8 )、その厚み(t9 )は、
前記と同様、50mm、0.5mmとした。In the continuous casting mold C (Example 3) shown in FIGS. 1, 6, and 7, the N of the long pieces 26, 26a
The width (L 9 ) of the i-plate 28 is 50 mm, and the thicknesses (t 10 , t 5 ) of the upper and lower ends thereof are 0.5 mm and 0.5 mm, respectively.
5 mm (see Table 2). The vertical width (L 8 ) and the thickness (t 9 ) of the Ni plating 25 of the short pieces 23 and 23a are as follows:
Similar to the above, they were 50 mm and 0.5 mm.
【0045】また、図1、図6、図8に示す連続鋳造用
鋳型D(実施例4)においては、長片30、30aのN
iめっき32の縦幅(L7 )、横幅(L9 )、その上、
下端厚み(t8 、t10、t5 )は、前記と同様、50m
m、50mm、0.5mm、0.5mm、0.5mm
(表2参照)とした。なお、この場合も、短片23、2
3aのNiめっき25の縦幅(L8 )、その厚み
(t9 )は、前記と同様、50mm、0.5mmとし
た。In the continuous casting mold D (Embodiment 4) shown in FIGS. 1, 6, and 8, the N
The vertical width (L 7 ), the horizontal width (L 9 ) of the i-plate 32,
The lower end thickness (t 8 , t 10 , t 5 ) is 50 m as described above.
m, 50mm, 0.5mm, 0.5mm, 0.5mm
(See Table 2). In this case as well, the short pieces 23, 2
The vertical width (L 8 ) and the thickness (t 9 ) of the Ni plating 25 of 3a were set to 50 mm and 0.5 mm as described above.
【0046】また、図1、図9、図10に示す連続鋳造
用鋳型E(実施例5)においては、長片34、34aの
Niめっき36の上、下端の厚み(t11、t5 )は0.
5mm、0.5mm(表2参照)、また、短片37、3
7aのNiめっき39の上、下端に亘って一様な厚み
(t12)は0.5mmとした。Further, in the continuous casting mold E (Embodiment 5) shown in FIGS. 1, 9 and 10, the thickness (t 11 , t 5 ) of the upper and lower ends of the Ni plating 36 of the long pieces 34, 34a. Is 0.
5 mm, 0.5 mm (see Table 2)
The uniform thickness (t 12 ) over the upper and lower ends of the Ni plating 39 of 7a was 0.5 mm.
【0047】また、図1、図11、図12に示す連続鋳
造用鋳型F(実施例6)においては、長片40、40a
のNiめっき42の上、下端の厚み(t13、t14)は、
それぞれ、0.3mm、0.5mm、Crめっき43の
上、下端に亘って一様な厚み(t15)は0.03mm、
また、短片44、44aのNiめっき46の上、下端に
亘って一様な厚み(t16)は1.0mm、Crめっき4
7の上、下端に亘って一様な厚み(t17)は0.03m
mとした。Further, in the continuous casting mold F (Embodiment 6) shown in FIGS. 1, 11 and 12, the long pieces 40, 40a
On the Ni plating 42, the thickness of the lower end (t 13, t 14) is
Each has a uniform thickness (t 15 ) of 0.03 mm over the upper and lower ends of 0.3 mm, 0.5 mm, and Cr plating 43.
The uniform thickness (t 16 ) of the short pieces 44 and 44a over the upper and lower ends of the Ni plating 46 is 1.0 mm, and the Cr plating 4
The uniform thickness (t 17 ) over the upper and lower ends of 7 is 0.03 m
m.
【0048】また、図1、図6、図11に示す長片4
0、40aと短片23、23aを有する連続鋳造用鋳型
(実施例7)も準備した。この際、長片40、40aの
Niめっき42の上、下端の厚み(t13、t14)、Cr
めっき43の厚み(t15)は、前記と同様、0.3m
m、0.5mm、0.03mmとし、また、短片23、
23aのNiめっき25の縦幅(L8 )、その厚み(t
9 )は前記と同様、50mm、0.5mmとした。The long piece 4 shown in FIGS.
A continuous casting mold (Example 7) having 0, 40a and short pieces 23, 23a was also prepared. At this time, on the Ni plating 42 of the long piece 40, 40a, the thickness of the lower end (t 13, t 14), Cr
The thickness (t 15 ) of the plating 43 is 0.3 m as described above.
m, 0.5 mm, and 0.03 mm.
The vertical width (L 8 ) and thickness (t 8 ) of the Ni plating 25 of 23a
9 ) was set to 50 mm and 0.5 mm similarly to the above.
【0049】更に、比較例として、図13に示す長片5
0と短片52を有する連続鋳造用鋳型(比較例1)、図
14に示す長片55と短片60を有する連続鋳造用鋳型
(比較例2)、図15に示す長片65と短片67を有す
る連続鋳造用鋳型(比較例3)を準備した。Further, as a comparative example, a long piece 5 shown in FIG.
0 and a short piece 52 (Comparative Example 1), a continuous casting mold having a long piece 55 and a short piece 60 shown in FIG. 14 (Comparative Example 2), and a long piece 65 and a short piece 67 shown in FIG. A casting mold for continuous casting (Comparative Example 3) was prepared.
【0050】なお、図13に示す連続鋳造用鋳型(比較
例1)は、長片50の内側下部50aにNiめっき51
を形成すると共に、短片52の内側下部52aにNiめ
っき53を形成したもので、長片50と短片52の各寸
法(L1 〜L3 、L5 、L6、t1 、t2 、t5 〜
t7 )は表1、表2に示す通りとした。また、長片50
の内面と短片52の両側面の曲率半径(φ)も前記と同
様10500mmとした。The continuous casting mold (Comparative Example 1) shown in FIG.
To form a, obtained by forming a Ni plating 53 on the inner lower 52a of short piece 52, the dimensions of the long piece 50 and short strip 52 (L 1 ~L 3, L 5, L 6, t 1, t 2, t 5 to
t 7 ) was as shown in Tables 1 and 2. In addition, long piece 50
The radius of curvature (φ) of the inner surface and the both side surfaces of the short piece 52 was set to 10500 mm in the same manner as described above.
【0051】また、図14に示す連続鋳造用鋳型(比較
例2)は、長片55の内側下部55aにNi−Coめっ
き(Ni:Co=1:9)56を形成すると共に、その
内側上部55bにNiめっき57とCrめっき58を積
層する一方、短片60の内側下部60aにNi−Coめ
っき(Ni:Co=1:9)61を形成すると共に、そ
の内側上部60bにNiめっき62とCrめっき63を
積層したものである。In the continuous casting mold (Comparative Example 2) shown in FIG. 14, a Ni-Co plating (Ni: Co = 1: 9) 56 is formed on an inner lower portion 55a of a long piece 55, and an inner upper portion thereof is formed. While Ni plating 57 and Cr plating 58 are laminated on 55b, Ni-Co plating (Ni: Co = 1: 9) 61 is formed on the inner lower part 60a of the short piece 60, and Ni plating 62 and Cr are formed on the inner upper part 60b. The plating 63 is laminated.
【0052】そして、この場合、長片55のNiめっき
57の上、下端の厚み(t13、t14)、Crめっき58
の上、下端に亘って一様な厚み(t15)は、それぞれ、
0.3mm、0.5mm、0.03mm、また、短片6
0のNiめっき62の上、下端に亘って一様な厚み(t
16)、Crめっき63の上、下端に亘って一様な厚み厚
み(t17)は、それぞれ1.0mm、0.03mmとし
た。In this case, the thickness (t 13 , t 14 ) of the upper and lower ends of the Ni plating 57 of the long piece 55 and the Cr plating 58
The uniform thickness (t 15 ) over the upper and lower edges is
0.3mm, 0.5mm, 0.03mm, and short piece 6
0 uniform thickness (t) over the upper and lower ends of the Ni plating 62
16 ), uniform thickness over the upper and lower ends of the Cr plating 63 The thickness (t 17 ) was 1.0 mm and 0.03 mm, respectively.
【0053】なお、この場合も、長片55と短片60の
各寸法(L1 〜L3 、L5 、L6 、t1 、t2 、t5 〜
t7 )は表1、表2に示す通りとし、また、長片55の
内面と短片60の両側面の曲率半径(φ)も前記と同様
10500mmとした。Also in this case, each dimension (L 1 to L 3 , L 5 , L 6 , t 1 , t 2 , t 5 to L 5) of the long piece 55 and the short piece 60 is also used.
t 7 ) was as shown in Tables 1 and 2, and the radii of curvature (φ) of the inner surface of the long piece 55 and both side surfaces of the short piece 60 were also 10500 mm, similarly to the above.
【0054】また、図15に示す連続鋳造用鋳型(比較
例3)は、長片65の内側下部65aに表3に示す化学
組成の自溶性合金粉末をプラズマ溶射して溶射皮膜層6
6を形成すると共に、短片67の内側下部67aに表3
に示す化学組成の自溶性合金粉末をプラズマ溶射して溶
射皮膜層68を形成したものである。In the continuous casting mold (Comparative Example 3) shown in FIG. 15, a self-fluxing alloy powder having a chemical composition shown in Table 3 is plasma-sprayed on an inner lower portion 65a of a long piece 65 to form a sprayed coating layer 6.
6 and the lower part 67a of the short piece 67
Is formed by spraying a self-fluxing alloy powder having the chemical composition shown in FIG.
【0055】そして、この場合も、長片65と短片67
の各寸法(L1 〜L3 、L5 、L6、t1 、t2 、t5
〜t7 )は表1、表2に示す通り、また、長片65の内
面と短片67の両側面の曲率半径(φ)も前記と同様1
0500mmとした。In this case, too, the long piece 65 and the short piece 67
Of each dimension (L 1 to L 3 , L 5 , L 6 , t 1 , t 2 , t 5
To t 7 ) are as shown in Tables 1 and 2, and the radii of curvature (φ) of the inner surface of the long piece 65 and both side surfaces of the short piece 67 are also 1 as described above.
It was set to 0500 mm.
【0056】そして、各連続鋳造用鋳型A〜Fを実機に
搭載して使用したところ、表4に示すように、比較例1
の寿命を1とした(約100チャージ程度)とき、比較
例2、3では、多少寿命を延長できたが、実施例1〜7
では、遙に(約3000チャージ程度)寿命延長できる
ことが確認された。Then, when each of the continuous casting molds A to F was mounted on an actual machine and used, as shown in Table 4, Comparative Example 1
Assuming that the lifetime was 1 (approximately 100 charges), in Comparative Examples 2 and 3, the lifetime could be extended somewhat, but in Examples 1 to 7
It was confirmed that the life could be extended much (about 3000 charges).
【0057】[0057]
【表4】 [Table 4]
【0058】以上、本発明の実施の形態を説明したが、
本発明は上記した実施の形態に限定されるものではな
く、要旨を逸脱しない条件の変更等は全て本発明の適用
範囲である。例えば、本発明の第1〜第6の実施の形態
では、幅可変の鋳型A〜Fについて説明したが、幅固定
の鋳型であってもよい。この場合、各短片が当接する長
片の両内側側部にそれぞれ第1の溶射皮膜層を設ければ
よい。また、本発明の第1〜第6の実施の形態は、湾曲
型連続鋳造機に適用したが、垂直型連続鋳造機に適用し
てもよい。この場合、長片の内面と短片の両側面を平面
状にすればよい。また、本発明の第1〜第6の実施の形
態では、ブルームを連続鋳造する鋳型A〜Fについて説
明したが、スラブを連続鋳造する鋳型であってもよい。
この場合、長片や短片のサイズを大きくすればよい。The embodiment of the present invention has been described above.
The present invention is not limited to the above-described embodiment, and all changes in conditions that do not depart from the gist are within the scope of the present invention. For example, in the first to sixth embodiments of the present invention, the molds A to F having variable widths have been described, but molds having a fixed width may be used. In this case, the first thermal spray coating layer may be provided on both inner side portions of the long piece with which each short piece contacts. Further, the first to sixth embodiments of the present invention are applied to a curved continuous casting machine, but may be applied to a vertical continuous casting machine. In this case, the inner surface of the long piece and both side surfaces of the short piece may be made flat. Further, in the first to sixth embodiments of the present invention, the molds A to F for continuously casting bloom have been described, but molds for continuously casting slabs may be used.
In this case, the size of the long piece or the short piece may be increased.
【0059】また、本発明の第1〜第6の実施の形態で
は、2ストランドタイプの連続鋳造機に適用したが、1
ストランドタイプ、3ストランドタイプ等の連続鋳造機
に適用してもよい。また、本発明の第2〜第6の実施の
形態では、Niめっき22、25、28、32、36、
39、42、46を形成したが、Ni−Co等のNi合
金めっきを形成してもよい。また、本発明の第1〜第6
の実施の形態では、第1の溶射皮膜層13、14の厚み
を、その上端から下端まで徐々に厚くしたが、上端から
下端まで一様にしてもよい。逆に、第2の溶射皮膜層1
7の厚みを、その上端から下端まで徐々に厚くしてもよ
い。In the first to sixth embodiments of the present invention, the present invention is applied to a two-strand type continuous casting machine.
It may be applied to a continuous casting machine of a strand type, a three-strand type, or the like. In the second to sixth embodiments of the present invention, Ni plating 22, 25, 28, 32, 36,
Although 39, 42 and 46 are formed, a Ni alloy plating such as Ni-Co may be formed. In addition, the first to sixth aspects of the present invention
In the first embodiment, the thickness of the first sprayed coating layers 13 and 14 is gradually increased from the upper end to the lower end, but may be uniform from the upper end to the lower end. Conversely, the second thermal spray coating layer 1
7 may be gradually thickened from its upper end to its lower end.
【0060】[0060]
【発明の効果】以上の説明から明らかなように、請求項
1〜3記載の連続鋳造用鋳型においては、長片の両内側
側部と内側下部、更に、短片の内側下部に、第1、第2
の溶射皮膜層を形成したので、鋳片殻(又は鋳片、溶
鋼)に対する耐摩耗性を向上することができ、長寿命を
有する連続鋳造用鋳型を提供することができる。特に、
請求項2記載の連続鋳造用鋳型においては、長片や短片
の上端より下端に亘って硬さを傾斜的に変化させること
ができ、隣接部分での剥離や局部摩耗を防止することが
できる。請求項3記載の連続鋳造用鋳型においては、母
材の酸化を防止することができ、更に長寿命化を図るこ
とができる。As is apparent from the above description, in the continuous casting mold according to the first to third aspects, the first and second inner side portions of the long piece and the inner lower portion of the short piece have the first, Second
Since the thermal spray coating layer is formed, the wear resistance to the slab shell (or slab, molten steel) can be improved, and a continuous casting mold having a long life can be provided. Especially,
In the continuous casting mold according to the second aspect, the hardness can be inclinedly changed from the upper end to the lower end of the long piece or the short piece, and peeling or local wear at an adjacent portion can be prevented. In the continuous casting mold according to the third aspect, oxidation of the base material can be prevented, and the life can be further extended.
【図1】本発明の第1〜第3の実施の形態に係る連続鋳
造用鋳型の斜視図である。FIG. 1 is a perspective view of a continuous casting mold according to first to third embodiments of the present invention.
【図2】(a)は本発明の第1の実施の形態に係る連続
鋳造用鋳型の長片の斜視図である。(b)は図2(a)
の矢視W−W断面図である。FIG. 2 (a) is a perspective view of a long piece of a continuous casting mold according to the first embodiment of the present invention. (B) is FIG.
FIG. 4 is a sectional view taken along line WW of FIG.
【図3】(a)は同連続鋳造用鋳型の短片の平面図であ
る。(b)は同短片の正面図である。(c)は図3
(b)の矢視X−X断面図である。FIG. 3A is a plan view of a short piece of the continuous casting mold. (B) is a front view of the short piece. (C) is FIG.
It is arrow XX sectional drawing of (b).
【図4】溶射状況の説明図である。FIG. 4 is an explanatory diagram of a spraying state.
【図5】(a)は本発明の第2の実施の形態に係る連続
鋳造用鋳型の長片の斜視図である。(b)は図5(a)
の矢視Q−Q断面図である。FIG. 5 (a) is a perspective view of a long piece of a continuous casting mold according to a second embodiment of the present invention. FIG. 5 (a) shows the state of FIG.
5 is a sectional view taken along the line QQ in FIG.
【図6】(a)は同連続鋳造用鋳型の短片の平面図であ
る。(b)は同短片の正面図である。(c)は図6
(b)の矢視K−K断面図である。FIG. 6A is a plan view of a short piece of the continuous casting mold. (B) is a front view of the short piece. (C) is FIG.
It is arrow KK sectional drawing of (b).
【図7】(a)は本発明の第3の実施の形態に係る連続
鋳造用鋳型の長片の斜視図である。(b)は図7(a)
の矢視R−R断面図である。(c)は図7(a)の矢視
S−S断面図である。FIG. 7A is a perspective view of a long piece of a continuous casting mold according to a third embodiment of the present invention. FIG. 7 (a)
It is RR sectional drawing of arrow. FIG. 8C is a sectional view taken along the line SS in FIG.
【図8】(a)は本発明の第4の実施の形態に係る連続
鋳造用鋳型の長片の斜視図である。(b)は図8(a)
の矢視Y−Y断面図である。(c)は図8(a)の矢視
J−J断面図である。FIG. 8A is a perspective view of a long piece of a continuous casting mold according to a fourth embodiment of the present invention. FIG. 8 (a)
5 is a sectional view taken along the line YY in FIG. (C) is a sectional view taken along the line JJ in FIG. 8 (a).
【図9】(a)は本発明の第5の実施の形態に係る連続
鋳造用鋳型の長片の斜視図である。(b)は図9(a)
の矢視N−N断面図である。FIG. 9 (a) is a perspective view of a long piece of a continuous casting mold according to a fifth embodiment of the present invention. FIG. 9B shows the state shown in FIG.
It is arrow NN sectional drawing of the arrow.
【図10】(a)は同連続鋳造用鋳型の短片の平面図で
ある。(b)は同短片の正面図である。(c)は図10
(b)の矢視P−P断面図である。FIG. 10 (a) is a plan view of a short piece of the continuous casting mold. (B) is a front view of the short piece. (C) is FIG.
It is arrow PP sectional drawing of (b).
【図11】(a)は本発明の第6の実施の形態に係る連
続鋳造用鋳型の長片の斜視図である。(b)は図11
(a)の矢視L−L断面図である。FIG. 11A is a perspective view of a long piece of a continuous casting mold according to a sixth embodiment of the present invention. (B) is FIG.
It is an arrow LL sectional view of (a).
【図12】(a)は同連続鋳造用鋳型の短片の平面図で
ある。(b)は同短片の正面図である。(c)は図12
(b)の矢視M−M断面図である。FIG. 12A is a plan view of a short piece of the continuous casting mold. (B) is a front view of the short piece. (C) is FIG.
It is arrow MM sectional drawing of (b).
【図13】(a)、(b)はそれぞれ本発明の第1〜第
6の実施の形態に係る連続鋳造用鋳型の比較例の長片と
短片の斜視図である。13A and 13B are perspective views of a long piece and a short piece of a comparative example of the continuous casting mold according to the first to sixth embodiments of the present invention, respectively.
【図14】(a)、(b)はそれぞれ本発明の第1〜第
6の実施の形態に係る連続鋳造用鋳型の比較例の長片と
短片の斜視図である。FIGS. 14 (a) and (b) are perspective views of a long piece and a short piece of a comparative example of a continuous casting mold according to the first to sixth embodiments of the present invention, respectively.
【図15】(a)、(b)はそれぞれ本発明の第1〜第
6の実施の形態に係る連続鋳造用鋳型の比較例の長片と
短片の斜視図である。FIGS. 15A and 15B are perspective views of a long piece and a short piece of a comparative example of the continuous casting mold according to the first to sixth embodiments of the present invention, respectively.
【図16】従来の湾曲型連続鋳造機の要部説明図であ
る。FIG. 16 is an explanatory view of a main part of a conventional curved continuous casting machine.
【図17】(a)は従来の湾曲型連続鋳造機に用いる連
続鋳造用鋳型の斜視図である。(b)は同連続鋳造用鋳
型の分解斜視図である。FIG. 17A is a perspective view of a continuous casting mold used in a conventional curved continuous casting machine. (B) is an exploded perspective view of the continuous casting mold.
【図18】(a)〜(c)は同連続鋳造用鋳型のメニス
カス近傍部位の不具合の要部拡大斜視図である。(d)
は同連続鋳造用鋳型の長片の不具合を説明する正面図で
ある。(e)は同連続鋳造用鋳型のメニスカス近傍部位
の不具合の要部斜視図である。FIGS. 18 (a) to (c) are enlarged perspective views of a main part of a defect near a meniscus of the continuous casting mold. (D)
FIG. 2 is a front view for explaining a problem of a long piece of the continuous casting mold. (E) is a main part perspective view of a defect near the meniscus of the continuous casting mold.
【図19】(a)は同連続鋳造用鋳型の長片の不具合の
説明図である。(b)は図19(a)の矢視T−T断面
図である。(c)は連続鋳造用鋳型の長片の不具合の説
明図である。(d)は同長片の不具合の説明図である。
(e)は図19(d)の矢視U−U断面図である。FIG. 19 (a) is an explanatory diagram of a defect of a long piece of the continuous casting mold. (B) is a sectional view taken along the line TT in FIG. 19 (a). (C) is explanatory drawing of the defect of the long piece of the casting mold for continuous casting. (D) is explanatory drawing of the defect of the same long piece.
(E) is a sectional view taken along the line U-U in FIG. 19 (d).
【図20】従来の連続鋳造用鋳型の長片の斜視図であ
る。FIG. 20 is a perspective view of a long piece of a conventional continuous casting mold.
【図21】(a)は従来の連続鋳造用鋳型の短片の平面
図である。(b)は同短片の正面図である。(c)は図
21(b)の矢視V−V断面図である。FIG. 21 (a) is a plan view of a short piece of a conventional continuous casting mold. (B) is a front view of the short piece. (C) is a sectional view taken along line VV in FIG. 21 (b).
A 連続鋳造用鋳型 B 連続鋳造用
鋳型 C 連続鋳造用鋳型 D 連続鋳造用
鋳型 E 連続鋳造用鋳型 F 連続鋳造用
鋳型 11 長片 11a 長片 12 母材 12a 内側側
部 12b 内側下部 12c 内側上
部 12d U字状部分 12e 帯状部
分 12f I字状部分 13 第1の溶
射皮膜層 14 第1の溶射皮膜層 15 短片 15a 短片 16 母材 16a 内側下部 16b 内側上
部 16c 帯状部分 17 第2の溶
射皮膜層 18 高速火炎溶射機 20 長片 20a 長片 21 母材 22 Niめっき 23 短片 23a 短片 24 母材 25 Niめっき 26 長片 26a 長片 27 母材 28 Niめっき 30 長片 30a 長片 31 母材 32 Niめっき 34 長片 34a 長片 35 母材 36 Niめっき 37 短片 37a 短片 38 母材 39 Niめっき 40 長片 40a 長片 41 母材 42 Niめっき 43 Crめっ
き 44 短片 44a 短片 45 母材 46 Niめっ
き 47 CrめっきReference Signs List A Continuous casting mold B Continuous casting mold C Continuous casting mold D Continuous casting mold E Continuous casting mold F Continuous casting mold 11 Long piece 11a Long piece 12 Base material 12a Inner side part 12b Inner lower part 12c Inner upper part 12d U-shaped part 12e Strip-shaped part 12f I-shaped part 13 First sprayed coating layer 14 First sprayed coating layer 15 Short piece 15a Short piece 16 Base material 16a Inner lower part 16b Inner upper part 16c Strip part 17 Second sprayed coating layer 18 High-speed flame spraying machine 20 Long piece 20a Long piece 21 Base material 22 Ni plating 23 Short piece 23a Short piece 24 Base material 25 Ni plating 26 Long piece 26a Long piece 27 Base material 28 Ni plating 30 Long piece 30a Long piece 31 Base material 32 Ni plating 34 Long piece 34a Long piece 35 Base material 36 Ni plating 37 Short piece 37a Short piece 38 Base material 39 Ni plating 40 Piece 40a length piece 41 preform 42 Ni plating 43 Cr plating 44 short pieces 44a short side 45 preform 46 Ni plating 47 Cr plating
───────────────────────────────────────────────────── フロントページの続き (72)発明者 野崎 雅晴 千葉県君津市君津1番地 新日本製鐵株式 会社君津製鐵所内 (72)発明者 丹生谷 一廣 千葉県木更津市新港21番地 三島光産株式 会社機工事業本部千葉出張所内 (72)発明者 田邊 雅昭 千葉県木更津市新港21番地 三島光産株式 会社機工事業本部千葉出張所内 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Masaharu Nozaki 1 Kimitsu, Kimitsu City, Chiba Prefecture Inside Nippon Steel Corporation (72) Inventor Kazuhiro Nibuya 21 Shinko Port, Kisarazu City, Chiba Prefecture Mishima Kosan Stock (72) Inventor Masaaki Tanabe 21st station, Shinko, Kisarazu-shi, Chiba Mishima Kosan Co., Ltd.Chiba branch office
Claims (3)
れた一対の短片とを有する連続鋳造用鋳型であって、 前記各短片が摺動当接する前記長片の両内側側部、及
び、凝固した鋳片殻が触れる前記長片の内側下部に、自
溶性合金の第1の溶射皮膜層がそれぞれ形成されている
と共に、前記鋳片殻が触れる前記短片の内側下部にも、
自溶性合金の第2の溶射皮膜層がそれぞれ形成されてい
ることを特徴とする連続鋳造用鋳型。1. A continuous casting mold having a pair of long pieces and a pair of short pieces disposed between the pair of long pieces, wherein both short sides are in sliding contact with both inner sides of the long piece. The first part of the long piece that the solidified slab shell contacts with the solidified slab shell is formed with a first thermal spray coating layer of a self-fluxing alloy, and the inner lower part of the short piece that the slab shell touches. ,
A casting mold for continuous casting, wherein a second sprayed coating layer of a self-fluxing alloy is formed.
第1の溶射皮膜層に隣接する部分、及び、前記短片の内
側上部で、少なくとも前記第2の溶射皮膜層に隣接する
部分に、Ni又はNi合金めっきがそれぞれ形成されて
いる請求項1記載の連続鋳造用鋳型。2. Ni is provided on an inner upper portion of the long piece at least in a portion adjacent to the first sprayed coating layer and on an inner upper portion of the short piece at least in a portion adjacent to the second sprayed coating layer. 2. The casting mold for continuous casting according to claim 1, wherein Ni plating is formed.
内側上部の表層には、Crめっきがそれぞれ形成されて
いる請求項1又は2記載の連続鋳造用鋳型。3. The continuous casting mold according to claim 1, wherein a Cr plating is formed on an inner upper surface of the long piece and on an inner upper surface of the short piece, respectively.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23887297A JP3649870B2 (en) | 1997-08-19 | 1997-08-19 | Continuous casting mold |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP23887297A JP3649870B2 (en) | 1997-08-19 | 1997-08-19 | Continuous casting mold |
Publications (2)
Publication Number | Publication Date |
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JPH1157949A true JPH1157949A (en) | 1999-03-02 |
JP3649870B2 JP3649870B2 (en) | 2005-05-18 |
Family
ID=17036524
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JP23887297A Expired - Fee Related JP3649870B2 (en) | 1997-08-19 | 1997-08-19 | Continuous casting mold |
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JP (1) | JP3649870B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006346733A (en) * | 2005-06-20 | 2006-12-28 | Mishima Kosan Co Ltd | Mold for continuous casting, and its manufacturing method |
-
1997
- 1997-08-19 JP JP23887297A patent/JP3649870B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006346733A (en) * | 2005-06-20 | 2006-12-28 | Mishima Kosan Co Ltd | Mold for continuous casting, and its manufacturing method |
JP4759326B2 (en) * | 2005-06-20 | 2011-08-31 | 三島光産株式会社 | Continuous casting mold |
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JP3649870B2 (en) | 2005-05-18 |
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