JPS635854A - Bottom plate for ingot making - Google Patents
Bottom plate for ingot makingInfo
- Publication number
- JPS635854A JPS635854A JP15099186A JP15099186A JPS635854A JP S635854 A JPS635854 A JP S635854A JP 15099186 A JP15099186 A JP 15099186A JP 15099186 A JP15099186 A JP 15099186A JP S635854 A JPS635854 A JP S635854A
- Authority
- JP
- Japan
- Prior art keywords
- surface plate
- layer
- metal
- thermal
- bottom plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims abstract description 26
- 229910052751 metal Inorganic materials 0.000 claims abstract description 26
- 230000008439 repair process Effects 0.000 claims description 21
- 238000002844 melting Methods 0.000 abstract description 15
- 230000008018 melting Effects 0.000 abstract description 15
- 238000007751 thermal spraying Methods 0.000 abstract description 10
- 238000003466 welding Methods 0.000 abstract description 7
- 238000005422 blasting Methods 0.000 abstract description 6
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- 238000005266 casting Methods 0.000 abstract description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 description 35
- 239000010959 steel Substances 0.000 description 35
- 239000010410 layer Substances 0.000 description 28
- 230000003628 erosive effect Effects 0.000 description 10
- 239000002344 surface layer Substances 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000035939 shock Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910018487 Ni—Cr Inorganic materials 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 239000008119 colloidal silica Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000011823 monolithic refractory Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 235000020357 syrup Nutrition 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Landscapes
- Coating By Spraying Or Casting (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、造塊用定盤に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a surface plate for agglomeration.
（従来の技術）
造塊用の定盤は高炉銑直注解物、キューポラ鋳物に分類
されるが、これら定盤には使用時の溶損、焼付けを防止
する意味で、敷鉄板、冷延屑、石英ガラスとコロイドシ
リカ等を配合した塗料が定盤保護材として該定盤製造時
塗布されている。また、使用中に定盤に溶損が発生し、
かつ拡大した場合は、溶損部を溶接肉盛および不定形耐
火物で形状復元して再使用する方法が一般的に行われて
いる。(Prior art) Surface plates for ingot making are classified into blast furnace direct pouring and cupola casting, but to prevent melting and seizure during use, these surfaces are equipped with iron plates and cold-rolled scraps. A paint containing quartz glass, colloidal silica, etc. is applied as a surface plate protection material during manufacture of the surface plate. In addition, the surface plate may be eroded during use,
If the damage is enlarged, the commonly used method is to restore the shape of the damaged part using welding overlay or monolithic refractories and reuse it.
（発明が解決しようとする問題点）
しかるに、造塊用定盤は非常に笥酷な条件下で繰り返し
使用されるもので、溶鋼注入流の熱衝撃、溶鋼落下圧力
により溶損が進み、また−方では加熱、冷却の繰り返し
によるヒートクラックの発生、進展、グラファイトの成
長脱落に伴い定盤の溶損、つまり定盤ウェル部の内容積
が増大して（るため、前述の定盤保護材の使用のみでは
定盤の溶損を大きく軽減するには至っていない。(Problem to be solved by the invention) However, the surface plate for ingot making is used repeatedly under very harsh conditions, and the thermal shock of the molten steel injection flow and the falling pressure of the molten steel progresses the melting and damage. - On the other hand, heat cracks occur and develop due to repeated heating and cooling, and the surface plate is eroded due to graphite growth and falling off.In other words, the internal volume of the surface plate well increases (because of this, The use of only has not been able to significantly reduce the erosion of the surface plate.
特に溶鋼注入温度が１５６０℃を越えた時、あるいは注
入ノズルの大きい大型鋼塊の時、ウェル定盤の溶損が増
大する。これをこのまま放置しておくと、定盤の使用回
数の増大に伴い表層部のクレージング（亀甲割れ）深さ
が進展し、溶鋼注入時に溶鋼がクレージングの溝に差込
み、型抜きの際、鋼塊が抜けな（なる、所謂定盤付きの
発生頻度が高くなる。このため前述の肉盛溶接による形
状の復元がなされるが、この修理補修を行ってもヒ記厳
しい条件下では、数度の焼付きで肉盛部は剥離脱落し、
短い使用回数をもって使用不能となり、廃却せざるを得
ない。それは繰り返し肉盛溶接を行って形状を復元して
も、ト記使用回数と修理費用との採算が合わないからで
ある。Particularly when the molten steel injection temperature exceeds 1560°C or when a large steel ingot has a large injection nozzle, the melting damage of the well surface plate increases. If this condition is left as is, the depth of crazing on the surface layer will increase as the number of times the surface plate is used increases, and when molten steel is injected, the molten steel will be inserted into the grooves of the crazing, and when cutting, the steel ingot will This increases the frequency of so-called surface plate attachment.For this reason, the shape is restored by overlay welding as described above, but even with this repair, under severe conditions, the Due to seizure, the build-up part peels off and falls off.
After a short number of uses, it becomes unusable and must be disposed of. This is because even if the shape is restored by repeated overlay welding, the number of uses and repair costs are not profitable.
さらに定盤の溶損は、次のような問題を派生させている
。１つは溶損が進むと鋼塊の内容積が増量することであ
り、鋼塊単重が大きくなり、造塊の最終定盤鋼塊に溶鋼
量が不足し、単重不足が生じる。Furthermore, erosion of the surface plate causes the following problems. One is that as the melting loss progresses, the internal volume of the steel ingot increases, and the unit weight of the steel ingot increases, resulting in an insufficient amount of molten steel in the final platen steel ingot for ingot making, resulting in an insufficient unit weight.
他方では鋼塊のウェル形状が変形することにより、ミス
マツチの不一致により分塊圧延時の半成品、ボトム側フ
ィシュテイル形状に余肉が付き、クロップの切捨て量が
増して歩留りが低下する問題がある。また、定盤付きの
発生は分塊工場への鋼塊搬送時間が延び、燃料原単位を
あげる要因になっている。On the other hand, due to the deformation of the well shape of the steel ingot, there is a problem that due to mismatching, extra thickness is added to the bottom side fishtail shape of the semi-finished product during blooming rolling, and the amount of crop cut-off increases, resulting in a decrease in yield. In addition, the occurrence of surface plates increases the time required to transport the steel ingots to the blooming plant, which is a factor that increases the fuel consumption rate.
本発明は、以上の問題を解消し、定盤の寿命延長、鋼塊
品質および歩留りの向１−を図ることを目的とする。The present invention aims to solve the above-mentioned problems and to extend the life of the surface plate, improve the quality of the steel ingot, and improve the yield.
（問題点を解決するための手段）
本発明は、新しい定盤、もしくは肉盛補修後の定盤の表
面に、アンダコート材としての金属と、トップコート材
としての耐熱セラミックスを溶射形成した造塊用定盤を
特徴とする。(Means for Solving the Problems) The present invention provides a structure in which metal as an undercoat material and heat-resistant ceramics as a topcoat material are thermally sprayed on the surface of a new surface plate or a surface plate after overlay repair. Features a surface plate for lumps.
（作用）
本発明は、造塊用定盤の溶損を従来の技術に増して軽減
させるには、定盤の場当たり部など溶損を最も受は易い
部位は全体に高い耐熱、耐衝撃に優れた表層部を造る以
外にないと判断した結果に基づいて、耐熱型、耐摩耗性
、耐靭性の優れた金属およびセラミックスを定盤表面に
溶射したもので、溶鋼の熱衝撃を直接受ける最表層トッ
プフート材にセラミック・スを用いる一方、セラミック
ス単体では熱伝導性の小さいこと、母材との断熱性の差
によりセラミックスのクラック発生脱落が早い時期に発
生することを考慮し、母材とセラミックスの中間に金属
をアンダーコート材として介在されることにより、上記
セラミックス層にて定盤の溶損を確実に防止しつつ、金
属層によって該セラミックスを強固に定盤に保持させる
ものである（実施例）
以下、本発明の一実施例を図面を用いて説明する。(Function) In order to reduce the erosion damage of the surface plate for ingot making more than the conventional technology, the parts of the surface plate that are most susceptible to erosion loss, such as the contact area, are made to have high heat resistance and impact resistance as a whole. Based on the results that determined that there was no choice but to create an excellent surface layer, metals and ceramics with excellent heat resistance, wear resistance, and toughness were sprayed onto the surface of the surface plate. While ceramics are used as the top foot material for the surface layer, we have taken into account that ceramic alone has low thermal conductivity, and that ceramics crack and fall off at an early stage due to the difference in insulation properties with the base material. By interposing a metal as an undercoat material between the ceramics, the ceramic layer reliably prevents melting of the surface plate, and the metal layer firmly holds the ceramic on the surface plate. Embodiment) An embodiment of the present invention will be described below with reference to the drawings.
本発明は第１図（Ａ）（Ｂ）に示すような新品の定盤（
１）の表面の符号（５）に示す溶射領域、または第２図
（Ａ）（Ｂ）に示すように肉盛補修された定盤（ｌａ）
の肉盛溶接層（２）上に、まず研磨仕上げを施し、ショ
ツトブラストまたはカットワイヤブラストにより梨地肌
に仕上げ、その上にまずアンダーコート材として金属（
Ｎ ｉ −Ｃｒ金属等）を溶射し、次にトップコート材
として耐熱セラミックス（Ｚｒ（Ｌ等）を溶射し、定盤
寿命の延長を図るもので、これによって第３図のように
肉盛溶接層（２）または鋳物層の上に金属層（３）、セ
ラミックス層（４）が形成される。尚、第１図および第
２図において符号（ｌｌｉ）は黒鉛レンガを示す。The present invention is based on a new surface plate (
The sprayed area shown in code (5) on the surface of 1) or the surface plate (la) repaired by overlay as shown in Figures 2 (A) and (B)
The overlay weld layer (2) is first polished and finished to a satin finish by shot blasting or cut wire blasting, and then metal (2) is first applied as an undercoat material.
Ni-Cr metal, etc.) is thermally sprayed, and then a heat-resistant ceramic (Zr (L, etc.) is thermally sprayed as a top coat material to extend the life of the surface plate, and as shown in Figure 3, overlay welding A metal layer (3) and a ceramic layer (4) are formed on the layer (2) or the cast layer.In addition, in FIGS. 1 and 2, the symbol (lli) indicates a graphite brick.
Ｎｉ−Ｃｒ金属は耐熱性、耐靭性、密着性に優れた金属
であり、Ｚｒｏｓ セラミックスは高融点、高強度のも
ので、なかでも結晶構造が立方晶系で安定形のＣＺｒ０
ｔが良く、これは低温から高温まで組織的に安定してい
る。また、ＣＺ ｒＯｌは転位を起こさず、安定化を図
るためＣａＯ３〜１２％含有させである。因みに鋼との
密着力は７０〜９０ ｋｇ／ａｍと安定している。Ni-Cr metal is a metal with excellent heat resistance, toughness resistance, and adhesion, and Zros ceramics have a high melting point and high strength.
It has a good t and is structurally stable from low to high temperatures. Further, CZrOl does not cause dislocation and is made to contain 3 to 12% of CaO in order to stabilize it. Incidentally, the adhesion force to steel is stable at 70 to 90 kg/am.
上記金属層（３）およびセラミックス層（４）の溶射厚
と溶射回数を変えて定盤の寿命を実験によって確かめた
結果によれば、従来法（中途補修１回）による１８〜２
３トン鋼塊用ウエル寿命の平均は第４図のように平均９
０回程度であり、これに対しアンダーコート厚１００μ
、トップコート厚２００μの施工とした本発明の施工例
Ｉでは中途補修後１回の溶射て１２０回まで改善された
。また、新品時と中途修理時の２回溶射施工では寿命が
１６５回まで足長された。According to the results of experiments to confirm the service life of the surface plate by changing the spraying thickness and number of spraying of the metal layer (3) and ceramic layer (4), it was found that the conventional method (one mid-year repair) was 18 to 2
The average well life for 3 ton steel ingots is 9 as shown in Figure 4.
On the other hand, when the undercoat thickness is 100μ
In construction example I of the present invention, in which a top coat thickness of 200 μm was applied, the thermal spraying was improved to 120 times with one thermal spraying after mid-term repair. Furthermore, by applying thermal spraying twice, once when new and once during repair, the lifespan was extended to 165 cycles.
第４図の本発明施Ｉ〕例■は、１回あたりの溶射厚をア
ンダーコート２００μ、トップコート３００μに増した
もので、定盤の寿命は中途補修１回で１５０凹に改善さ
れ、新品時と中途補修時の２回旋：ｒ、では２１０回に
延長された。Example (I) of the present invention shown in Fig. 4 increases the thermal spraying thickness per coat to 200 μm undercoat and 300 μm top coat, and the service life of the surface plate is improved to 150 concavities with one mid-term repair, and it is brand new. 2 rotations at the time and during mid-term repair: R, it was extended to 210 times.
さらに実験によれば、アンダーコート材の厚みは厚い方
が有効であったが、労力的また経済的な見地から５００
μ以下が限界となることが確かめられた。つまりシップ
コート層は加熱、冷却、熱衝撃による繰り返し応力によ
り微細クラックが発生し、表層部の応力バランスが保た
れるが、セラミックス層が必要以上に厚くなると、微細
クラックを起点にしてクラックの進展、開孔が早くなり
、セラミックスが脱落欠損する場合があり、経済的にみ
て５００μが限度となる。尚、上記実験には従来技術で
ある定盤保護材を使用している。Furthermore, according to experiments, the thicker the undercoat material, the more effective it is, but from a labor and economic point of view,
It was confirmed that the limit is less than μ. In other words, microcracks occur in the ship coat layer due to repeated stress due to heating, cooling, and thermal shock, and the stress balance in the surface layer is maintained, but if the ceramic layer becomes thicker than necessary, cracks will start from the microcracks and develop. , pores may open quickly and the ceramic may fall off and be damaged, and from an economical point of view, the limit is 500μ. In the above experiment, a surface plate protection material, which is a conventional technique, was used.
（発明の効果）
以上詳述したように本発明によれば、定盤の溶損度合が
軽減され、大幅な寿命延長が図れると共に、定盤と鋼塊
の焼付率が従来（例えば５．６％程度のもの）に比べ著
しく減少（例えば１．５％まで減少）シ、これに伴いト
ラツタイムの短縮ができ、分塊］二場の燃料原単位が低
減する。(Effects of the Invention) As described in detail above, according to the present invention, the degree of erosion of the surface plate can be reduced, the service life can be significantly extended, and the seizing rate of the surface plate and steel ingot can be reduced compared to the conventional one (for example, 5.6 %) (for example, down to 1.5%), and as a result, the processing time can be shortened, and the fuel consumption rate in the field of agglomeration can be reduced.
第１図（Ａ）（Ｂ）は本発明を新品定盤に施した場合の
定盤断面図（Ａ）と平面図（Ｂ）、第２図（Ａ）（Ｂ）
は肉盛補修後に施した場合の定盤断面図（Ａ）と平面図
（Ｂ）、第３図は定盤表層部溶射層の構造図、第４図は
従来技術との比較における実験データを示す図である。
（１）（Ｉａ）・・・定盤、（３）・・・金属層（アン
ダーコート材） 、（４）・・・セラミックス層（トッ
プコート材）。
第 Ｉ 図（Ａ）
第１敗Ｂ）
第２ 図（Ａ）
第２欧Ｂ）
第３図
第４図
中這琳箒１日溶解
手 続 補 正 書 （自発）昭和６１年７
り？ノ日
ｔ ：ｒｔ件の表示
昭和６１年 特 許願 第１５０９９１号２ 発明の名
称
造塊用定盤
３ 補正をする者
事件との関係 特許出願人
住所 神戸市中央区脇浜町１丁目３番１８号名称
（＋１９）株式会社 神戸製鋼所 （外１名）４代理
人
７、補正の内容
別紙のとおり。
明 細 書
１、発明の名称
造塊用定盤
２、特許請求の範囲
新しい定盤、もしくは肉盛補修後の定盤の表面に、アン
ダコート材としての金属と、トップコート材としての耐
熱セラミックスを溶射形成した造塊用定盤。
３、発明の詳細な説明
（産業上の利用分野）
本発明は、造塊用定盤に関する。
（従来の技術）
造塊用の定盤は高炉銑直注鋳物、キューポラ鋳物に分類
されるが、これら定盤には使用時の溶損、焼付けを防止
する意味で、敷鉄板、冷延屑を敷いたり石英ガラスとコ
ロイドシリカ等を配合した塗料が定盤保護材として該定
盤使用時塗布されている。また、使用中に定盤に溶損が
発生し、かつ拡大した場合は、溶損部を溶接肉盛および
不定形耐火物で形状復元して再使用する方法が一般的に
行われている。
（発明が解決しようとする問題点）
しかるに、造塊用定盤は非常に苛酷な条件下で繰り返し
使用されるもので、溶鋼注入流の熱衝撃、溶鋼落下圧力
により溶損が進み、また−方では加熱、冷却の繰り返し
によるヒートクラックの発生、進展、グラファイトの成
長脱落に伴い定盤の溶損、つまり定盤ウェル部の内容積
が増大して（るため、前述の定盤保護材の使用のみでは
定盤の溶損を大きく軽減するには至っていない。
特に溶鋼注入温度が１５６０℃を越えた時、あるいは注
入ノズルの大きい大型鋼塊の時、ウェル定盤の溶損が増
大する。これをこのまま放置しておくと、定盤の使用回
数の増大に伴い表層部のクレージング（亀甲割れ）深さ
が進展し、溶鋼注入時に溶鋼がクレージングの溝に差込
み、型抜きの際、鋼塊が抜けなくなる所謂定盤付きの発
生頻度が高くなる。このため前述の肉盛溶接による形状
の復元がなされるが、この修理補修を行っても上記厳し
い条件下では、散開の焼付きで肉盛部は剥離脱落し、短
い使用回数をもって使用不能となり、廃却せざるを得な
い。それは繰り返し肉盛溶接を行って形状を復元しても
、上記使用回数と修理費用との採算が合わないからであ
る。
さらに定盤の溶損は、次のような問題を派生させている
。１つは溶損が進むと鋼塊の容積が増量することであり
、鋼塊単重が太き（なり、造塊の最終定盤鋼塊に溶鋼量
が不足し、単重不足が生じる。
他方では鋼塊のウェル形状が変形することにより、分塊
圧延時の生成品、ボトム側フィシュティル形状に余肉が
付き、クロップの切捨て量が増して歩留りが低下する問
題がある。また、定盤付きの発生は分塊工場への鋼塊搬
送時間が延び、燃料原単位をあげる要因になっている。
本発明は、以上の問題を解消し、定盤の寿命延長、鋼塊
品質および歩留りの向上を図ることを目的とする。
（問題点を解決するための手段）
本発明は、新しい定盤、もしくは肉盛補修後の定盤の表
面に、アンダフート材としての金属と、トップコート材
としての耐熱セラミックスを溶射形成した造塊用定盤を
特徴とする。
（作用）
本発明は、造塊用定盤の溶損を従来の技術に増して軽減
させるには、定盤の場当たり部など溶損を最も受は易い
部位は全体に高い耐熱、耐衝撃に優れた表層部を造る以
外にないと判断した結果に基づいて、耐熱性、耐摩耗性
、耐靭性の優れた金属およびセラミックスを定盤表面に
溶射したもので、溶鋼の熱衝撃を直接受ける最表層トッ
プコート材にセラミックスを用いる一方、セラミックス
単体では熱伝導性の小さいこと、母材との断熱性の差に
よりセラミックスのクラック発生脱落が早い時期に発生
することを考慮し、母材とセラミックスの中間に金属を
アンダーコート材として介在させることにより、上記セ
ラミックス層にて定盤の溶損を確実に防止しつつ、金属
層によって該セラミックスを強固に定盤に保持させるも
のである（実施例）
以下、本発明の一実施例を図面を用いて説明する。
本発明は第１図（Ａ）（Ｂ）に示すような新品の定盤（
１）の表面の符号（５）に示す溶射領域、または第２図
（Ａ）（Ｂ）に示すように肉盛補修された定盤（１ａ）
の肉盛溶接層（２）上に、まず研磨仕上げを施し、シロ
ットブラストまたはカットワイヤブラストにより梨地肌
に仕上げ、その上にまずアンダーコート材として金属（
Ｎｉ−Ｃｒ金属等）を溶射し、次にトップコート材とし
て耐熱セラミックス（Ｚｒｏｔ等）を溶射し、定盤寿命
の延長を図るもので、これによって第３図のように肉盛
溶接層（２）または鋳物層の上に金属層（３）、セラミ
ックス層（４）が形成される。尚、第１図および第２図
において符号（６）は黒鉛レンガを示す。
Ｎｉ−Ｃｒ金属は耐熱性、耐靭性、密着性に優れた金属
であり、Ｚｒｏｔ セラミックスは高融点、高強度のも
ので、なかでも結晶構造が立方晶系で安定形のＣＺｒ０
＊ が良く、これは低温から高温まで組織的に安定して
いる。また、Ｃ−Ｚｒ０１ は転位を起こさず、安定化
を図るためＣａＯ又はＹ、０８等を５〜１２％含をさせ
である。因みに鋼との密着力は７０〜９０ ｋｇ／ｃ＋
ｗ２と安定して、いる。
上記金属層（３）およびセラミックス層（４）の溶射厚
と溶射回数を変えて定盤の寿命を実験によって確かめた
結果によれば、従来法（中途補修１回）による１８〜２
３トン鋼塊用ウエル定盤寿命の平均は第４図のように平
均９０回程度であり、これに対しアンダーフート厚１０
０μ、トラフコート厚２００μの施工とした本発明の施
工例工では中途補修後１回の溶射て１２０回まで改善さ
れた。また、新品時と中途修理時の２回溶射施工では寿
命が１６５回まで延長された。
第４図の本発明施工例■は、１回あたりの溶射厚をアン
ダーコート２００μ、トップコート３００μに増したも
ので、定盤の寿命は中途補修１回で１５０回に改善され
、新品時と中途補修時の２回施工では２１０回に延長さ
れた。
さらに実験によれば、トップコート材の厚みは厚い方が
を効であったが、労力的また経済的な見地から６００μ
以下が限界となることが確かめられた。つまりトップコ
ート層は加熱、冷却、熱衝撃による繰り返し応力により
微細クラックが発生し、表層部の応力バランスが保たれ
るが、セラミックス層が必要以上に厚くなると、微細ク
ラックを起点にしてクラックの進展、開孔が早くなり、
セラミックスが脱落欠損する場合があり、経済的にみて
５００μが限度となる。尚、上記実験には従来技術であ
る定盤保護材を使用している。
（発明の効果）
以上詳述したように本発明によれば、定盤の溶損度合が
軽減され、大幅な寿命延長が図れると共に、定盤と鋼塊
の焼付率が従来（例えば５．６％程度のもの）に比べ著
しく減少（例えば１．５％まで減少）シ、これに伴いト
ラックタイムの短縮ができ、分塊工場の燃料原単位が低
減する。
４、図面の簡単な説明
第１図（Ａ）（Ｂ）は本発明を新品定盤に施した場合の
定盤断面図（Ａ）と平面図（Ｂ）、第２図（Ａ）（Ｂ）
は肉盛補修後に施した場合の定盤断面図（Ａ）と平面図
（Ｂ）、第３図は定盤表層部溶射層の構造図、第４図は
従来技術との比較における実験データを示す図である。
（ＩＨＩａ）・・・定盤、（３）・・・金属層（アンダ
ーコート材） 、（４）・・・セラミックス層（トップ
コート材）。Figures 1 (A) and (B) are a sectional view (A) and a plan view (B) of the surface plate when the present invention is applied to a new surface plate, and Figures 2 (A) and (B).
Figure 3 shows the cross-sectional view (A) and plan view (B) of the surface plate when it is applied after overlay repair, Figure 3 shows the structure of the sprayed layer on the surface layer of the surface plate, and Figure 4 shows the experimental data in comparison with the conventional technology. FIG. (1) (Ia)... Surface plate, (3)... Metal layer (undercoat material), (4)... Ceramic layer (top coat material). Figure I (A) 1st loss B) Figure 2 (A) 2nd European B) Figure 3 Figure 4 Chukairinho 1-day dissolution procedure Amendment (self-motivated) July 1986
the law of nature? Date: rt Indication 1986 Patent Application No. 150991 2 Name of the invention Surface plate for ingot making 3 Relationship to the case of the person making the amendment Patent applicant address 1-3-18 Wakihama-cho, Chuo-ku, Kobe City name
(+19) Kobe Steel, Ltd. (1 other person) 4 representatives 7, details of the amendments are as shown in the attached sheet. Description 1, Name of the invention, Surface plate for ingot making 2, Claims: A new surface plate, or a surface plate after overlay repair, with metal as an undercoat material and heat-resistant ceramics as a top coat material. Surface plate for agglomeration formed by thermal spraying. 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a surface plate for making ingots. (Prior technology) Surface plates for ingot making are classified into blast furnace direct pouring castings and cupola castings, but to prevent melting and seizure during use, these surface plates are equipped with iron plates and cold-rolled scraps. When the surface plate is used, a paint containing quartz glass and colloidal silica is applied as a protective material for the surface plate. In addition, when melt damage occurs and expands on the surface plate during use, the commonly used method is to restore the shape of the melt damage part with weld overlay and monolithic refractories and reuse it. (Problems to be Solved by the Invention) However, the surface plate for ingot making is used repeatedly under very severe conditions, and the thermal shock of the molten steel injection flow and the pressure of the molten steel falling progresses to cause melting damage, and - On the other hand, heat cracks occur and develop due to repeated heating and cooling, and the surface plate is eroded due to graphite growth and falling off.In other words, the internal volume of the surface plate well increases (because of this, the surface plate protection material mentioned above) The use alone has not been able to significantly reduce the erosion of the surface plate.Especially when the molten steel injection temperature exceeds 1560°C or when a large steel ingot has a large injection nozzle, the erosion of the well surface plate increases. If this condition is left as is, the depth of crazing on the surface layer will increase as the number of times the surface plate is used increases, and when molten steel is injected, the molten steel will be inserted into the grooves of the crazing, and when cutting, the steel ingot will This increases the frequency of so-called surface plate attachments that cannot be removed.For this reason, the shape is restored by overlay welding as described above, but even if this repair is performed, under the above severe conditions, the overlay will fail due to scattered seizure. The parts peel off, become unusable after a short number of uses, and have to be discarded.This is because even if the shape is restored by repeating overlay welding, the number of uses and repair costs are not profitable. Furthermore, erosion of the surface plate leads to the following problems.One is that as the erosion progresses, the volume of the steel ingot increases, and the unit weight of the steel ingot increases. , there is insufficient amount of molten steel in the final platen steel ingot for ingot making, resulting in insufficient unit weight.On the other hand, due to the well shape of the steel ingot being deformed, there is excess in the bottom side fishtail shape of the product during blooming. There is a problem in that the yield is reduced due to thickening, which increases the amount of crops to be discarded.Furthermore, the occurrence of surface plate attachment prolongs the time required to transport the steel ingot to the blooming plant, which is a factor that increases the fuel consumption rate. The present invention aims to solve the above-mentioned problems and to extend the life of the surface plate and improve the quality of the steel ingot and the yield. (Means for solving the problems) Alternatively, the surface plate for ingot making is characterized by spraying metal as an underfoot material and heat-resistant ceramics as a top coat material on the surface of the surface plate after overlay repair. In order to reduce melting damage on the surface plate more than with conventional technology, the only way to reduce the damage caused by melting damage on the surface plate is to create a surface layer that has excellent heat resistance and impact resistance throughout the parts that are most susceptible to melting damage, such as the bumpy parts of the surface plate. Based on the results of the judgment, metals and ceramics with excellent heat resistance, wear resistance, and toughness are thermally sprayed onto the surface of the surface plate.While ceramics are used for the top coat material, which is the outermost layer that is directly exposed to the thermal shock of molten steel, Considering that ceramic alone has low thermal conductivity and that ceramic cracks and falls off quickly due to the difference in insulation properties with the base material, metal is interposed between the base material and ceramics as an undercoat material. As a result, the ceramic layer reliably prevents melting of the surface plate, while the metal layer firmly holds the ceramic on the surface plate. Explain using. The present invention is based on a new surface plate (
The sprayed area shown in code (5) on the surface of 1) or the surface plate (1a) that has been repaired by overlay as shown in Figures 2 (A) and (B)
The overlay weld layer (2) is first polished and then finished with a satin finish by syrup blasting or cut wire blasting, and then metal (2) is applied as an undercoat material.
This method aims to extend the service life of the surface plate by thermally spraying a heat-resistant ceramic (Zrot, etc.) as a top coat material. ) or a metal layer (3) and a ceramic layer (4) are formed on the cast layer. In addition, in FIG. 1 and FIG. 2, the code|symbol (6) shows a graphite brick. Ni-Cr metal is a metal with excellent heat resistance, toughness resistance, and adhesion, and Zrot ceramics have a high melting point and high strength.
* It is structurally stable from low to high temperatures. Further, C-Zr01 does not cause dislocation and contains 5 to 12% of CaO or Y, 08, etc. in order to stabilize it. By the way, the adhesion strength to steel is 70 to 90 kg/c+
It is stable at w2. According to the results of experiments to confirm the service life of the surface plate by changing the spraying thickness and number of spraying of the metal layer (3) and ceramic layer (4), it was found that the conventional method (one mid-year repair) was 18 to 2
The average life of the well surface plate for 3-ton steel ingots is about 90 times as shown in Figure 4, whereas the underfoot thickness of 10
In the example work of the present invention in which the coating thickness was 0μ and the trough coat thickness was 200μ, the improvement was improved to 120 times with one thermal spraying after mid-term repair. In addition, by applying thermal spraying twice, once when new and once during repair, the lifespan was extended to 165 times. In construction example (■) of the present invention shown in Fig. 4, the thickness of thermal spraying is increased to 200 μm undercoat and 300 μm top coat per time, and the service life of the surface plate is improved to 150 times with one mid-term repair, compared to when it was new. The number of repairs was extended to 210 times during the two-time repair. Furthermore, according to experiments, the thicker the top coat material, the more effective it is, but from a labor and economic point of view, 600μ
The following limits were confirmed. In other words, microcracks occur in the top coat layer due to repeated stress due to heating, cooling, and thermal shock, and the stress balance in the surface layer is maintained. However, if the ceramic layer becomes thicker than necessary, cracks will start from the microcracks and develop. , pore opening becomes faster,
The ceramic may fall off and be damaged, and from an economical point of view, the limit is 500μ. In the above experiment, a surface plate protection material, which is a conventional technique, was used. (Effects of the Invention) As described in detail above, according to the present invention, the degree of erosion of the surface plate can be reduced, the service life can be significantly extended, and the seizing rate of the surface plate and steel ingot can be reduced compared to the conventional one (for example, 5.6 %) (for example, down to 1.5%), the track time can be shortened, and the fuel consumption rate of the blooming plant can be reduced. 4. Brief explanation of the drawings Figures 1 (A) and (B) are cross-sectional views (A) and plan views (B) of the surface plate when the present invention is applied to a new surface plate, and Figures 2 (A) and (B). )
Figure 3 shows the cross-sectional view (A) and plan view (B) of the surface plate when it is applied after overlay repair, Figure 3 shows the structure of the sprayed layer on the surface layer of the surface plate, and Figure 4 shows the experimental data in comparison with the conventional technology. FIG. (IHIa)... Surface plate, (3)... Metal layer (undercoat material), (4)... Ceramic layer (top coat material).
Claims (1)
ダコート材としての金属と、トップコート材としての耐
熱セラミックスを溶射形成した造塊用定盤。A surface plate for ingot making that has metal as an undercoat material and heat-resistant ceramics as a topcoat material sprayed on the surface of a new surface plate or a surface plate after overlay repair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15099186A JPS635854A (en) | 1986-06-26 | 1986-06-26 | Bottom plate for ingot making |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15099186A JPS635854A (en) | 1986-06-26 | 1986-06-26 | Bottom plate for ingot making |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS635854A true JPS635854A (en) | 1988-01-11 |
Family
ID=15508895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15099186A Pending JPS635854A (en) | 1986-06-26 | 1986-06-26 | Bottom plate for ingot making |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS635854A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007220616A (en) * | 2006-02-20 | 2007-08-30 | Gunze Ltd | Surface heating element and clothing using this |
| JP2008091246A (en) * | 2006-10-03 | 2008-04-17 | Gunze Ltd | Planar heating element and garment using this |
-
1986
- 1986-06-26 JP JP15099186A patent/JPS635854A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007220616A (en) * | 2006-02-20 | 2007-08-30 | Gunze Ltd | Surface heating element and clothing using this |
| JP2008091246A (en) * | 2006-10-03 | 2008-04-17 | Gunze Ltd | Planar heating element and garment using this |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0130626B1 (en) | Composite metal articles | |
| KR20090056923A (en) | Refractory crucibles capable of managing thermal stress and suitable for melting highly reactive alloys | |
| US8662143B1 (en) | Mold having ceramic insert | |
| JP2009541201A (en) | Refractory metal oxide ceramic component having platinum group metal or platinum group metal alloy coating | |
| KR20070010024A (en) | Metal material for foundry machine part, member for contact with molten aluminum, and process for producing the same | |
| US5564492A (en) | Titanium horseshoe | |
| JPS635854A (en) | Bottom plate for ingot making | |
| CN108486481B (en) | Preparation method of aluminum electrolytic cell crust breaking composite hammer | |
| JPS63157741A (en) | Mold for continuous casting | |
| AU2006317507A1 (en) | A method of manufacturing metallic composites in an inert atmosphere and composites produced thereby | |
| EP0355940A2 (en) | Continuous casting mold with removable insert | |
| CN111360232A (en) | Manufacturing method of composite cutting pick and composite cutting pick | |
| JP2014083577A (en) | Insertingly casting method of cermet | |
| JPS6224178B2 (en) | ||
| WO2002013996A1 (en) | A method of manufacturing metallic composites and composites produced thereby | |
| AU562569B2 (en) | Composite metal articles | |
| JPH0348195Y2 (en) | ||
| AU2001277412B2 (en) | A method of manufacturing metallic composites and composites produced thereby | |
| JP2000084645A (en) | Method for continuous use of tundish | |
| JPH09228071A (en) | Method for thermal spraying to casting mold for continuous casting and casting mold for continuous casting | |
| JPH07155909A (en) | Water-cooled mold and continuous casting excellent in erosion resistance | |
| JP2642661B2 (en) | Manufacturing method of high thermal conductive composite mold | |
| RU2344018C1 (en) | Method of fabrication of titanium crucibles with protective coating | |
| CZ2019201A3 (en) | A method of manufacturing a ceramic-metal composite by gravity casting and a ceramic-metal composite made according to this method | |
| Khvorov et al. | Protection of bottom plates by means of refractory coatings based on silicic acid ash and zirconium concentrate |