JPH04124255A - Continuously cast roll excellent in heat crack resistance - Google Patents
Continuously cast roll excellent in heat crack resistanceInfo
- Publication number
- JPH04124255A JPH04124255A JP24443490A JP24443490A JPH04124255A JP H04124255 A JPH04124255 A JP H04124255A JP 24443490 A JP24443490 A JP 24443490A JP 24443490 A JP24443490 A JP 24443490A JP H04124255 A JPH04124255 A JP H04124255A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- surface layer
- base material
- linear expansion
- sprayed
- 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
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000002344 surface layer Substances 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 9
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 8
- 239000000956 alloy Substances 0.000 claims abstract description 8
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- 229910052796 boron Inorganic materials 0.000 claims abstract description 5
- 239000011248 coating agent Substances 0.000 claims description 19
- 238000000576 coating method Methods 0.000 claims description 19
- 238000009749 continuous casting Methods 0.000 claims description 15
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000005507 spraying Methods 0.000 description 15
- 230000000694 effects Effects 0.000 description 14
- 230000003647 oxidation Effects 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000010309 melting process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Landscapes
- Continuous Casting (AREA)
- Coating By Spraying Or Casting (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
（産業上の利用分野）
本発明は、高温下で繰返し加熱・冷却を受ける連続鋳造
ロールにおいて、特に耐ヒートクラック性に優れた連続
鋳造ロールに関するものである。
（従来の技術）
連続鋳造ロールは、鋳片に強く押し付けられており、鋳
片と接触している部分が局部的に加熱され、すぐに冷却
されるため、ロール表面に引張残留応力が生じやすく、
早期にヒートクラックが発生するという問題がある。こ
のヒートクラックはロールにかかる軸方向の曲げ応力に
よって進展し。
場合によってはロールが折損することもあるため、連続
鋳造ロールは耐ヒートクラック性に優れている必要があ
る。
従来の連続鋳造ロールには、低合金鋼素地ロールの外周
面に１１〜１７Ｃｒ−Ｎｉ系鋼を肉盛したロールが使用
されている。また、一部には、このような成分系に更に
Ｍｏ、Ｖなどの合金成分を添加したタイプの肉盛ロール
も見受けられる。更には、Ｎｉ基又はＣｏ基自溶性合金
を溶射・溶融処理したものも見られる。
（発明が解決しようとする課題）
しかし、前述のように連続鋳造ロールは加熱・冷却を繰
返し受けるためにヒートクラックが発生しやすい環境下
で使用されることから、連続鋳造機の操業条件が過酷に
なるにつれて、耐ヒートクラック性に優れた１３Ｃｒ系
肉盛ロールであっても早期にヒートクラックが発生・進
展するケースがあり、ロールの使用寿命が著しく低下し
、整備費の増加や生産性の低下などの問題があった。
本発明はこのような状況に鑑みてなされたものであって
、耐ヒートクラック性に優れた連続鋳造ロールを提供す
ることを目的とするものである。
（課題を解決するための手段）
本発明者等は、上記問題点を解決するために種々検討を
重ねた結果、母材ロール表面上の表層部及び溶射及膜の
材質並びに線膨張係数を規定することにより、耐ヒート
クラック性が飛躍的に向上し、ロールの長寿命化が可能
であることを見い出し、ここに本発明をなしたものであ
る。
すなわち、本発明は、表層部が９〜２０％Ｃｒ含有鋼か
らなる母材ロールの胴部表面に、Ｆｅ：３５〜６５％、
Ｃ：０．１〜２．０％、Ｎｉ：３０〜４０％、Ｃｒ：９
〜２５％、Ｂ：０．５〜５％、５ｉ１０゜５〜５％を含
むＦｅ基自溶性合金を溶射し、かつ該溶射皮膜を溶融処
理したロールであって、該溶射皮膜の溶融処理後のＲＴ
（室温）〜５００℃における線膨張係数がロール表層部
を形成する９〜２０％Ｃｒ含有鋼のＲＴ〜５００℃にお
ける線膨張係数と同じか又は小さいことを特徴とする耐
ヒートクラック性に優れた連続鋳造ロールを要旨とする
ものである。
以下に本発明を更に詳述する。
（作用）
連続鋳造ロールは高温下で使用され、高温水蒸気や鋳片
との接触によって酸化や摩耗が生じやすい。また、操業
中に溶射層に発生したヒートクラックを通じて冷却水が
浸透し、溶射層とロール材との境界で酸化や腐食が進行
すると、溶射層の剥離が生じ易くなる。
したがって、母材ロールの表層部には、耐ヒートクラッ
ク性の他に耐高温酸化性、耐食性、耐熱性、耐摩耗性な
どが必要である。これらの性能を得るには、ロール表層
部のＣｒ量は少なくとも９％以上必要であるが、２０％
を超えるとその効果は飽和すると共に加熱・冷却による
脆化の危険性が増大する。
このように耐高温酸化性や耐食性などを維持するには、
ロール表層部のＣｒ量が９〜２０％であれば十分である
が、これらの特性をバランス良く向上させ、ロールを更
に長寿命化するには、母材ロールとして、１３Ｃｒ−Ｎ
ｉ系鋼を使用するか、或いは適宜材質の母材ロール素材
の表層部に１３Ｃｒ−Ｎｉ系鋼からなる溶接金属を肉盛
した母材ロールが望ましい。これは、共存元素やＮｉ量
にもよるが、１３Ｃｒ−Ｎｉ系鋼は、耐高温酸化性や耐
熱性はもとより５高強度であって良好な耐ヒートクラッ
ク性を示すためである。
ロール表面に溶射皮膜を形成すると、ロールが鋳片と接
触しても母材ロール素材は溶射皮膜を介して加熱される
ため、溶射層のないロールに比へて表面温度があがりに
くく、ヒートクラックが発生し難くなる。また、溶射皮
膜には方位性がないため、選択的なりラックが発生しに
くくなり、連続鋳造ロールの耐ヒートクラック性を改゛
善できる。
そのためには、以下の成分を含むＦｅ基自溶性合金から
なる溶射皮膜とする必要がある。
Ｆｅ：３５〜６５％
Ｆｅ基自溶性合金の基本成分であるが、溶融処理した溶
射皮膜の線膨張係数（ＲＴ〜５００℃）を９〜２０％Ｃ
ｒ含有鋼のそれ以下にするには、３５％以上が必要であ
る。しかし、６５％を超えるとＦｅ基自溶性合金の融点
が高くなり、溶射皮膜の溶融処理が著しく困難になる。
したがって、Ｆｅ量は３５〜６５％の範囲とする。
Ｃ：０．１〜２．０％
Ｃは硬度の向上に寄与するが、０．１％未満ではその効
果が不十分であり、また２、０％を超えても効果は飽和
してしまうので、Ｃ量は０．１〜２．０％の範囲とする
。
Ｎｉ：３０〜４０％
Ｎｉは溶射皮膜の耐熱性や融点の降下に寄与するが、３
０％未満ではその効果が得られず、また４０％を超える
と線膨張係数が増加するので。
Ｎｉ量は３０〜４０％の範囲とする。
Ｃｒ：９〜２５％
Ｃｒは溶射皮膜の耐高温酸化性、耐熱性及び耐食性を向
上させるが、９％未満ではその効果が薄く、また２５％
を超えてもその効果は殆ど変わらず、かえって溶融処理
が困難になるので、Ｃｒ量は９〜２５％の範囲とする。
Ｂ：０．５〜５％
Ｂは溶射皮膜の融点を下げ、ＮｉやＦｅ、Ｃｒの酸化を
軽減すると共に硬度の維持に寄与するが、０．５％未満
ではその効果が不十分であり、また５％を超えても効果
が飽和するので、Ｂ量は０゜５〜５％の範囲とする。
ｓｉ：ｏ、ｓ〜５％
ＳｉはＢと同様に溶射皮膜を低融点とし、ＮｉやＦｅ、
Ｃｒの酸化を減少させるが、０．５％未満ではその効果
が十分に発揮されず、また５％を超えてもその効果はあ
まり変わらず、かえって溶融処理を阻害してしまうので
、Ｓｉ量は０．５〜５％の範囲とする。
以上の成分組成からなる溶射皮膜を形成することによる
効果を長期にわたって得るためには、操業中に起こる溶
射皮膜の剥離を防止しなければならない。
そのためには、溶射のままの状態では、溶射皮膜とロー
ル素材の密着強さは非常に低く、使用開始直後に溶射皮
膜は剥離してしまうことを考慮して、本発明では、溶射
皮膜の耐剥離性を向上させるために溶融処理するもので
ある。
更に、本発明者等は、溶融処理した溶射皮膜のＲＴ〜５
００℃における線膨張係数が９〜２０％Ｃｒ含有鋼のそ
れと同じか若しくは小さいと、溶射皮膜の耐剥離性を著
しく改善できることを見い出した。
すなわち、連続鋳造ロールは加熱→水冷の熱サイクルを
繰返し受け、特にマシーンストップ時には高温まで加熱
され、すぐに水冷される。この時に、溶射皮膜の線膨張
係数がロール表層部の線膨張係数よりも大きければ、加
熱→冷却の熱サイクルに伴う体積の膨張／収縮率は溶射
皮膜の方が大きくなり、溶射皮膜とロール表層部の境界
で溶射皮膜は剥離しやすくなる。
一方、ＲＴ〜５００℃における溶射皮膜の線膨張係数が
ロール表層部を形成する９〜２ｏ％Ｃｒ含有鋼のそれよ
りも小さいか或いは同じであれば、溶射皮膜の剥離は起
こりにくくなるのである。なお、これらの効果を得るた
めには、溶射皮膜の厚さは１肩膓以下であることが望ま
しい。
本発明においては、溶射方法や溶融処理方法は如何なる
方法も適用可能であるが、ロール芯部まで溶融処理温度
近傍に加熱すると母材ロール素材の強度低下や靭性の劣
化を招く恐れがあるので、高周波やガスバーナーなどに
よってロール表面のみを加熱できる方法が好ましい。ま
た、母材ロール素材は、鋳鋼製のものや、母材に肉盛溶
接したものなど、如何なるものでも使用でき、一体型ロ
ールやスリーブタイプのものなど、形態も任意である。
次に本発明の実施例を示す。
（実施例）
連続鋳造設備における引抜きロールに、本発明による溶
射ロールと従来の肉盛ロールをそれぞれ組込み、使用時
の亀裂発生度合いを調査した。
ロール素材としては、胴部が３２０φのドライブロール
であり、低合金鋼製ロールの表層部に厚さ約５ＩＩＩｍ
の肉盛溶接金属をバンドアーク溶接にて形成したものを
用いた。第１表に肉盛溶接金属の化学成分を示す。
溶射は、ガス溶射にて行い、溶融処理は高周波誘導加熱
を用いた。そして、溶融処理後の溶射皮膜の厚さは０．
３〜Ｑ、４ｍｍとした。第２表に溶射粉末の化学成分を
示す。
なお、ロールの組込み位置は、本発明による溶射ロール
並びに従来の肉盛ロール共に連鋳ロール群における矯正
ゾーンとした。各ロールを組込んだ後、約２０００チヤ
ージ使用後のロール表面の亀裂発生状態並びに亀裂の最
大深さ（クラックメーターにて計測）及び溶射皮膜の残
存状況を調査した。
第３表に調査結果を示す。
本発明例は、約２０００チヤージ使用後もロール全面に
溶射皮膜が残存し、最大割れ深さが極めて浅く、良好な
耐ヒートクラック性を示した。
一方、比較例４に示すように、溶射粉末りを溶射した場
合では最大割れ深さが大きく、比較例５の肉盛のみの場
合とほぼ同じであり、使用早期に皮膜が剥離したことを
示しており、溶射皮膜の効果が殆ど得られなかった。な
お、比較例５は６００℃で肉盛溶接後、熱処理のみを施
したものである。(Industrial Application Field) The present invention relates to a continuous casting roll that is repeatedly heated and cooled at high temperatures, and particularly has excellent heat crack resistance. (Prior technology) Continuous casting rolls are strongly pressed against the slab, and the parts that are in contact with the slab are locally heated and quickly cooled, so tensile residual stress is likely to occur on the roll surface. ,
There is a problem that heat cracks occur early. This heat crack develops due to the axial bending stress applied to the roll. Since rolls may break in some cases, continuous casting rolls must have excellent heat crack resistance. Conventional continuous casting rolls use rolls in which 11-17Cr-Ni steel is overlaid on the outer peripheral surface of a low-alloy steel base roll. In addition, some types of overlay rolls are also found in which alloy components such as Mo and V are further added to such a component system. Furthermore, there are also products that are thermally sprayed and melted with Ni-based or Co-based self-fluxing alloys. (Problem to be solved by the invention) However, as mentioned above, continuous casting rolls are used in environments where heat cracks are likely to occur because they are repeatedly heated and cooled, so the operating conditions of continuous casting machines are harsh. As the age increases, even with 13Cr-based overlay rolls that have excellent heat crack resistance, heat cracks may occur and develop at an early stage, significantly shortening the roll's service life, increasing maintenance costs, and reducing productivity. There were problems such as decline. The present invention has been made in view of these circumstances, and an object of the present invention is to provide a continuous casting roll with excellent heat crack resistance. (Means for Solving the Problems) As a result of various studies to solve the above problems, the inventors have determined the material and linear expansion coefficient of the surface layer and thermal spray coating on the surface of the base roll. It has been discovered that by doing so, the heat crack resistance can be dramatically improved and the life of the roll can be extended, and the present invention has been made based on this discovery. That is, in the present invention, Fe: 35-65%, Fe: 35-65%,
C: 0.1-2.0%, Ni: 30-40%, Cr: 9
~ 25%, B: 0.5 to 5%, 5i10° 5 to 5%. A roll that has been thermally sprayed with an Fe-based self-fluxing alloy containing 5 to 5% of B: 0.5 to 5%, and that has been melt-treated with the thermally sprayed coating, after the thermal sprayed coating has been melt-treated. RT
(room temperature) to 500°C is the same or smaller than the linear expansion coefficient at RT to 500°C of the 9-20% Cr-containing steel forming the roll surface layer.Excellent heat crack resistance. The gist is continuous casting rolls. The present invention will be explained in further detail below. (Function) Continuous casting rolls are used at high temperatures, and are susceptible to oxidation and wear due to contact with high-temperature steam and slabs. Furthermore, if cooling water permeates through heat cracks that occur in the sprayed layer during operation, and oxidation or corrosion progresses at the boundary between the sprayed layer and the roll material, the sprayed layer is likely to peel off. Therefore, the surface layer of the base material roll must have high temperature oxidation resistance, corrosion resistance, heat resistance, abrasion resistance, etc. in addition to heat crack resistance. To obtain these performances, the amount of Cr in the surface layer of the roll must be at least 9%, but 20%
If it exceeds this, the effect will be saturated and the risk of embrittlement due to heating and cooling will increase. In this way, in order to maintain high temperature oxidation resistance and corrosion resistance,
It is sufficient if the Cr content in the roll surface layer is 9 to 20%, but in order to improve these properties in a well-balanced manner and further extend the life of the roll, 13Cr-N is used as the base material roll.
It is desirable to use i-series steel, or to use a base material roll in which weld metal made of 13Cr-Ni-series steel is overlaid on the surface layer of a base roll material made of an appropriate material. This is because 13Cr-Ni steel exhibits not only high temperature oxidation resistance and heat resistance but also high strength and good heat crack resistance, although it depends on the coexisting elements and the amount of Ni. When a thermal spray coating is formed on the roll surface, even when the roll comes into contact with the slab, the base roll material is heated through the thermal spray coating, so the surface temperature is less likely to rise compared to a roll without a thermal spray layer, resulting in heat cracks. becomes less likely to occur. In addition, since the thermal spray coating has no orientation, selective racking is less likely to occur, and the heat crack resistance of the continuous casting roll can be improved. For this purpose, it is necessary to form a thermal spray coating made of an Fe-based self-fluxing alloy containing the following components. Fe: 35-65% It is a basic component of Fe-based self-fluxing alloy, but the linear expansion coefficient (RT ~ 500°C) of the melt-treated thermal spray coating is 9-20%C.
In order to reduce the r content to less than that of steel, it is necessary to have a content of 35% or more. However, if it exceeds 65%, the melting point of the Fe-based self-fusing alloy becomes high, making melting treatment of the thermal spray coating extremely difficult. Therefore, the amount of Fe is in the range of 35 to 65%. C: 0.1-2.0% C contributes to improving hardness, but if it is less than 0.1%, the effect is insufficient, and if it exceeds 2.0%, the effect is saturated. , the amount of C is in the range of 0.1 to 2.0%. Ni: 30-40% Ni contributes to the heat resistance and lowering of the melting point of the sprayed coating, but 3
If it is less than 0%, the effect cannot be obtained, and if it exceeds 40%, the linear expansion coefficient increases. The amount of Ni is in the range of 30 to 40%. Cr: 9-25% Cr improves the high-temperature oxidation resistance, heat resistance, and corrosion resistance of the thermal spray coating, but if it is less than 9%, the effect is weak, and if it is less than 25%
Even if it exceeds Cr, the effect hardly changes, and the melting process becomes difficult, so the Cr content is set in the range of 9 to 25%. B: 0.5-5% B lowers the melting point of the sprayed coating, reduces oxidation of Ni, Fe, and Cr, and contributes to maintaining hardness, but if it is less than 0.5%, the effect is insufficient. Moreover, since the effect is saturated even if it exceeds 5%, the amount of B is set in the range of 0.5 to 5%. si: o, s ~ 5% Si has a low melting point for the thermal spray coating like B, and Ni, Fe,
Although it reduces the oxidation of Cr, if it is less than 0.5%, the effect will not be fully exhibited, and if it exceeds 5%, the effect will not change much, and the melting process will be inhibited, so the amount of Si is The range is 0.5% to 5%. In order to obtain the long-term effects of forming a thermal sprayed coating having the above-mentioned component composition, it is necessary to prevent the thermal sprayed coating from peeling off during operation. To this end, in the present invention, the adhesive strength between the thermal sprayed coating and the roll material is very low in the as-sprayed state, and the thermal sprayed coating will peel off immediately after the start of use. It is melt-treated to improve releasability. Furthermore, the present inventors have found that the temperature of the melt-treated thermal spray coating is
It has been found that when the coefficient of linear expansion at 00°C is the same as or smaller than that of steel containing 9 to 20% Cr, the peeling resistance of the thermal spray coating can be significantly improved. That is, the continuous casting roll undergoes a repeated thermal cycle of heating and water cooling, and is heated to a high temperature especially when the machine is stopped, and then immediately cooled with water. At this time, if the linear expansion coefficient of the thermal sprayed coating is larger than that of the roll surface layer, the thermal sprayed coating will have a larger volume expansion/contraction rate due to the thermal cycle of heating → cooling, and the thermal sprayed coating and the roll surface layer will The sprayed coating is likely to peel off at the boundaries of the parts. On the other hand, if the coefficient of linear expansion of the sprayed coating at RT to 500° C. is smaller than or the same as that of the 9-20% Cr-containing steel forming the roll surface layer, peeling of the sprayed coating is less likely to occur. In addition, in order to obtain these effects, it is desirable that the thickness of the thermal spray coating is one thickness or less. In the present invention, any thermal spraying method or melting treatment method can be applied, but if the roll core is heated near the melting treatment temperature, there is a risk of reducing the strength and toughness of the base roll material. A method in which only the roll surface can be heated using high frequency waves, a gas burner, or the like is preferred. Further, the base roll material may be of any type, such as cast steel or overlay welded to the base material, and may have any form, such as an integral roll or sleeve type. Next, examples of the present invention will be shown. (Example) A thermal spray roll according to the present invention and a conventional overlay roll were each incorporated into a drawing roll in continuous casting equipment, and the degree of crack occurrence during use was investigated. The roll material is a drive roll with a body of 320φ, and the surface layer of the low alloy steel roll has a thickness of approximately 5IIIm.
The overlay weld metal formed by band arc welding was used. Table 1 shows the chemical composition of the overlay weld metal. Thermal spraying was performed by gas spraying, and the melting treatment was performed using high frequency induction heating. The thickness of the sprayed coating after melting treatment is 0.
3 to Q, 4 mm. Table 2 shows the chemical composition of the thermal spray powder. The installation position of the rolls was set at the straightening zone in the continuous casting roll group for both the thermal spray roll according to the present invention and the conventional overlay roll. After each roll was installed, the appearance of cracks on the roll surface after approximately 2,000 charges, the maximum depth of the cracks (measured with a crack meter), and the remaining state of the sprayed coating were investigated. Table 3 shows the survey results. In the example of the present invention, the thermal spray coating remained on the entire surface of the roll even after approximately 2000 charges, the maximum crack depth was extremely shallow, and good heat crack resistance was exhibited. On the other hand, as shown in Comparative Example 4, when thermal spray powder was sprayed, the maximum crack depth was large and almost the same as in Comparative Example 5 where only overlay was used, indicating that the coating peeled off early in use. Therefore, almost no effect of the thermal spray coating was obtained. In Comparative Example 5, only heat treatment was performed after overlay welding at 600°C.
（発明の効果）
以上詳述したように、本発明によれば、耐ヒートクラッ
ク性に優れた連続鋳造ロールを提供することができるの
で、ロールの使用寿命を顕著に向上でき、コスト低減、
生産性向上に寄与する効果は大きい。
特許出原人 株式会社神戸製鋼所
同 トーカ口株式会社
代理人弁理士 中 村 尚(Effects of the Invention) As detailed above, according to the present invention, it is possible to provide a continuous casting roll with excellent heat crack resistance, so that the service life of the roll can be significantly improved, costs can be reduced, and
The effect of contributing to productivity improvement is significant. Patent originator: Kobe Steel, Ltd. Tokaguchi Co., Ltd. Representative patent attorney Hisashi Nakamura
Claims (3)
ｒ含有鋼からなる母材ロールの胴部表面に、Ｆｅ：３５
〜６５％、Ｃ：０．１〜２．０％、Ｎｉ：３０〜４０％
、Ｃｒ：９〜２５％、Ｂ：０．５〜５％、Ｓｉ：０．５
〜５％を含むＦｅ基自溶性合金を溶射し、かつ該溶射皮
膜を溶融処理したロールであって、該溶射皮膜の溶融処
理後のＲＴ（室温）〜５００℃における線膨張係数がロ
ール表層部を形成する９〜２０％Ｃｒ含有鋼のＲＴ〜５
００℃における線膨張係数と同じか又は小さいことを特
徴とする耐ヒートクラック性に優れた連続鋳造ロール。(1) In weight% (the same applies hereinafter), the surface layer is 9 to 20% C
Fe:35 is applied to the body surface of the base material roll made of r-containing steel.
~65%, C: 0.1~2.0%, Ni: 30~40%
, Cr: 9-25%, B: 0.5-5%, Si: 0.5
A roll on which an Fe-based self-fluxing alloy containing ~5% is thermally sprayed and the thermally sprayed coating is melt-treated, and the linear expansion coefficient at RT (room temperature) to 500°C after the melting treatment of the thermally sprayed coating is such that the surface layer of the roll has a linear expansion coefficient of RT~5 of 9~20% Cr containing steel forming
A continuous casting roll with excellent heat crack resistance characterized by a coefficient of linear expansion at 00°C that is the same or smaller.
求項１に記載のロール。(2) The roll according to claim 1, wherein the base material roll is made of 13Cr-Ni steel.
接金属を肉盛したロールである請求項１に記載のロール
。(3) The roll according to claim 1, wherein the base material roll is a roll whose surface layer is overlaid with 13Cr-Ni weld metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24443490A JP2931384B2 (en) | 1990-09-13 | 1990-09-13 | Continuous casting roll with excellent heat crack resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24443490A JP2931384B2 (en) | 1990-09-13 | 1990-09-13 | Continuous casting roll with excellent heat crack resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04124255A true JPH04124255A (en) | 1992-04-24 |
| JP2931384B2 JP2931384B2 (en) | 1999-08-09 |
Family
ID=17118600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24443490A Expired - Fee Related JP2931384B2 (en) | 1990-09-13 | 1990-09-13 | Continuous casting roll with excellent heat crack resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2931384B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0646052A1 (en) * | 1992-06-19 | 1995-04-05 | Commonwealth Scientific And Industrial Research Organisation | Rolls for metal shaping |
| WO2002012579A1 (en) * | 2000-08-04 | 2002-02-14 | Centro Sviluppo Materiali S.P.A. | Composition for elements having a high strength, in particular for hot wear and thermal fatigue, rolls coated with said composition and method of deposition for the coating |
| CN105377474A (en) * | 2013-06-17 | 2016-03-02 | 霍加纳斯股份有限公司 | Novel powder |
-
1990
- 1990-09-13 JP JP24443490A patent/JP2931384B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0646052A1 (en) * | 1992-06-19 | 1995-04-05 | Commonwealth Scientific And Industrial Research Organisation | Rolls for metal shaping |
| EP0646052A4 (en) * | 1992-06-19 | 1997-06-11 | Commw Scient Ind Res Org | Rolls for metal shaping. |
| US6171222B1 (en) | 1992-06-19 | 2001-01-09 | Commonwealth Scientific Industrial Research Organisation | Rolls for metal shaping |
| WO2002012579A1 (en) * | 2000-08-04 | 2002-02-14 | Centro Sviluppo Materiali S.P.A. | Composition for elements having a high strength, in particular for hot wear and thermal fatigue, rolls coated with said composition and method of deposition for the coating |
| CN105377474A (en) * | 2013-06-17 | 2016-03-02 | 霍加纳斯股份有限公司 | Novel powder |
| JP2016528379A (en) * | 2013-06-17 | 2016-09-15 | ホガナス アクチボラグ （パブル） | New powder |
| TWI661058B (en) * | 2013-06-17 | 2019-06-01 | 瑞典商好根那公司 | Novel powder |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2931384B2 (en) | 1999-08-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR900001424A (en) | Manufacturing method of hot rolled steel or weight plate | |
| CN103966477B (en) | A kind of making method of surface strengthen layer of wear resisting cast ball production mould and there is its mould | |
| MXPA00001139A (en) | Austenitic stainless steel strips having good weldability as cast. | |
| JPH04124255A (en) | Continuously cast roll excellent in heat crack resistance | |
| JPH03140450A (en) | Wear resistant alloy powder and member | |
| JPH03254304A (en) | Wear resistance conjugated roll | |
| JPH03238107A (en) | Production of roll for coiler of hot rolling equipment | |
| JPS61159247A (en) | Quick cooling roll for producing high-silicon thin steel strip | |
| JPH07188892A (en) | Method for forming metal sprayed coating | |
| JPH11320073A (en) | Production of two-layered nickel-base alloy clad steel sheet by casting method | |
| JP2571377B2 (en) | Roll for continuous casting of an arb leave type | |
| KR100241034B1 (en) | Built-up welding method | |
| CN110893523B (en) | High-strength copper-based amorphous brazing filler metal | |
| JPH02263505A (en) | Tool for working | |
| JPS5914101B2 (en) | Continuous casting roll with excellent breakage resistance | |
| JPH08225917A (en) | Thermal spraying method onto mold for continuous casting | |
| JP3464841B2 (en) | Method for forming molten layer of sprayed metal on copper base material | |
| JP2810762B2 (en) | Wear resistant composite roll | |
| JPH05212505A (en) | Method for continuously casting two-phase series stainless steel strip | |
| JP3113234B2 (en) | Screw for injection molding machine and method of manufacturing the screw | |
| JPH03114693A (en) | Stock for high chrome duplex stainless steel welding material | |
| JPS58157961A (en) | Surface treatment of copper and copper alloy | |
| JPS63248572A (en) | Build-up welding method for surface of copper member | |
| JP3471948B2 (en) | Rolls for continuous casting used by cooling from inside and outside | |
| JPH04266406A (en) | Plug for rolling high alloy seamless steel tube excellent in seizure resistance and plug protector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |