JPS6386856A - Thermally sprayed roll for treating hot steel slab - Google Patents
Thermally sprayed roll for treating hot steel slabInfo
- Publication number
- JPS6386856A JPS6386856A JP22828586A JP22828586A JPS6386856A JP S6386856 A JPS6386856 A JP S6386856A JP 22828586 A JP22828586 A JP 22828586A JP 22828586 A JP22828586 A JP 22828586A JP S6386856 A JPS6386856 A JP S6386856A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- rolls
- resistance
- alloy
- hot steel
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 17
- 239000010959 steel Substances 0.000 title claims abstract description 17
- 239000000919 ceramic Substances 0.000 claims abstract description 18
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 15
- 239000000956 alloy Substances 0.000 claims abstract description 15
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910003470 tongbaite Inorganic materials 0.000 claims abstract description 6
- 239000002131 composite material Substances 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 abstract description 12
- 238000007751 thermal spraying Methods 0.000 abstract description 4
- 229910000531 Co alloy Inorganic materials 0.000 abstract 3
- 229910000990 Ni alloy Inorganic materials 0.000 abstract 3
- 239000011651 chromium Substances 0.000 description 16
- 239000000463 material Substances 0.000 description 13
- 238000009749 continuous casting Methods 0.000 description 11
- 238000005299 abrasion Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 238000003466 welding Methods 0.000 description 6
- 229910052804 chromium Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 238000009750 centrifugal casting Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000270708 Testudinidae Species 0.000 description 1
- 229910052576 carbides based ceramic Inorganic materials 0.000 description 1
- -1 chromium carbides Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
- B22D11/1287—Rolls; Lubricating, cooling or heating rolls while in use
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Coating By Spraying Or Casting (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ｉ！１統鋳造の鋳片引抜き用、熱鋼片の搬送
用、加熱炉内鋼片移送用等の各種熱鋼片処理用の表面溶
射ロールに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to i! The present invention relates to a surface spraying roll for various types of hot steel billet processing, such as for drawing single-casting slabs, for conveying hot billets, and for transferring billets in heating furnaces.
従来の技術
製鉄所内における各種熱鋼片処理用に使用されるロール
のうち、熱鋼片の搬送用ロール及び加熱炉内鋼片移送用
ロールは、熱片との接触により加熱争空気冷却の熱サイ
クルを受け、Ｉ！ｌ！続鋳造の鋳片引抜き用ロールは高
温の鋳片と接触し、その後、冷却水により冷却されると
いう加熱・冷却の熱サイクルを受ける。Conventional technology Among the rolls used for various types of hot billet treatment in steel works, the rolls for conveying hot billets and the rolls for transferring billets in heating furnaces are heated by contact with hot billets, and the heat of air cooling is After receiving the cycle, I! l! Rolls for drawing slabs during continuous casting are brought into contact with hot slabs and then subjected to a heating/cooling thermal cycle in which they are cooled by cooling water.
さらに連続鋳造ロールの場合は、引抜き速度が一般に２
ｍ＃＋ｉｎ以下と極めて遅いため、通常のロールとは
比較にならない苛酷な熱サイクルを受ける。Furthermore, in the case of continuous casting rolls, the drawing speed is generally 2
Because it is extremely slow (less than m#+in), it is subjected to severe thermal cycles that are incomparable to ordinary rolls.
熱鋼片処理用ロールは、以上のようなｉ″ｆ酷な熱サイ
クルで使用されるため、加熱昏冷却のくりかえしにより
ロール表面に早期に熱亀裂が発生、発達して折損に至る
こともある。Rolls for hot billet processing are used under severe heat cycles as described above, so repeated heating and cooling may cause thermal cracks to develop and develop on the roll surface at an early stage, leading to breakage. .
また、高温の熱鋼片との接触によるロールの高温酸化摩
耗および冷却水による腐食摩耗は、熱鋼片の品質上厳し
く規制される。そのため熱鋼片処理用ロールには、優れ
た耐熱亀裂性と耐熱摩耗性が要求されている０以上のよ
うに熱鋼片処理用ロールには種々の問題がある。−例と
して連続鋳造用ロールについて述べる。In addition, high-temperature oxidation wear of the rolls due to contact with hot hot steel billets and corrosive wear due to cooling water are strictly regulated in terms of the quality of hot steel billets. Therefore, rolls for hot steel billet processing are required to have excellent heat cracking resistance and heat abrasion resistance.The rolls for hot steel billet processing have various problems such as 0 or more. - As an example, a continuous casting roll will be described.
従来、連続鋳造用ロールとしては、これらの特性に優れ
たクロームステンレス系の肉盛溶接ロールおよび遠心鋳
造スリーブロールが使用され良好な成績を収めてきた。Conventionally, chrome stainless steel overlay welding rolls and centrifugal casting sleeve rolls, which have excellent properties, have been used as rolls for continuous casting, and have achieved good results.
しかし最近連々鋳化の推進・圧縮鋳造の採用等ロールに
加わる負荷は益々増大しており、高クロームステンレス
系の肉感溶接ロール及び遠心鋳造スリーブロールの場合
でも、シャープで深いクラックが早期に発生したり、ロ
ールの肌荒れ摩耗が大きい等、従来とは異なった様々な
問題が発生してきている。特に、シャープなりラー、り
が発生して折損するケースが大きな問題となっている。However, with the recent promotion of casting and the adoption of compression casting, the load applied to rolls has been increasing, and even in the case of high chromium stainless steel texture welding rolls and centrifugally cast sleeve rolls, sharp and deep cracks can occur at an early stage. Various problems have arisen that are different from those of the past, such as roughening and abrasion of the roll surface. In particular, cases where sharp, uneven, or rippling occurs, causing breakage, have become a major problem.
また、最近、省エネルギーを目的として、鋳片およびロ
ールへの冷却を極端に少なくするか、あるいは省略した
高温連鋳化が進められており、その場合ロールに加わる
熱負荷は、従来の連Ｈ機よりはるかに高くなると予想さ
れる。従って、従来の肉盛溶接ロールあるいは遠心鋳造
鋳鋼ロールでは対応困難なのが実情である。In addition, recently, for the purpose of energy saving, high-temperature continuous casting has been promoted in which cooling of slabs and rolls is extremely reduced or omitted. expected to be much higher. Therefore, the reality is that it is difficult to use conventional overlay welding rolls or centrifugally cast cast steel rolls.
例えば特公昭５９−１４１０１号公報記載の耐折損性の
すぐれた連続鋳造用ロールでは、Ｃｒ７〜２０％のステ
ンレスロールの胴部に耐食性・耐熱・耐摩耗・耐密着性
向上のために、Ｎｉ基又はＣｏ基の合金（ｅｘ７０〜８
０％含有）を厚さ０．０５〜０．８ｍｍ ニ溶射肉盛し
、溶射層を溶融処理（加熱）してロール母材と冶金的に
結合させているが、連鋳ロールの使用が始まると、材質
の差もあり早期に溶射層全体に亀甲状の微細クラックが
入り、これがロールに転写してロール表面のみ浅いクラ
ックが入る。これが、熱応力を分散させ、深いクラック
は入らず、結局ロール折損しずらくなり長寿命となる。For example, in the continuous casting roll with excellent breakage resistance described in Japanese Patent Publication No. 59-14101, the body of the stainless steel roll containing 7 to 20% Cr is coated with Ni to improve corrosion resistance, heat resistance, abrasion resistance, and adhesion resistance. or Co-based alloy (ex70~8
0% content) to a thickness of 0.05 to 0.8 mm, and the sprayed layer is melted (heated) to metallurgically bond to the roll base material, but continuous casting rolls have begun to be used. Due to the difference in materials, microscopic cracks in the shape of a tortoise shell appear throughout the sprayed layer at an early stage, and these are transferred to the roll, resulting in shallow cracks only on the roll surface. This disperses thermal stress, prevents deep cracks, and ultimately makes the roll less likely to break, resulting in a longer life.
発明が解決しようとする問題点
しかし、この方法は、耐折損性には優れているが、熱間
（稼動中）に於て、溶射層の耐摩耗性が不足し、摩耗に
より寿命となり不十分であった。Problems to be Solved by the Invention However, although this method has excellent breakage resistance, the abrasion resistance of the thermal sprayed layer is insufficient during hot conditions (during operation), resulting in insufficient service life due to abrasion. Met.
又、特願昭８１−２３０４１号に記載の熱鋼片処理用溶
射ロールは、前述の特公昭５９−１４１０１号の溶射合
金の中に粒子又はファイバー状のセラミックを５〜８０
％（体積％）含有させたもので、実施例としてはＡＱ、
ｏ３ファイバー使用のものがある。Further, the thermal spray roll for hot steel billet treatment described in Japanese Patent Application No. 81-23041 contains 5 to 80 particles or fiber-shaped ceramics in the thermal sprayed alloy of Japanese Patent Publication No. 59-14101.
% (volume %), examples include AQ,
Some use o3 fiber.
本発明は、前述の特公昭５９−１４１０１号公報記載の
溶射合金中にＣｒ炭化物系セラミックス粒子を含有させ
ることにより耐折損性とともに耐摩耗性をも向上させる
ことを目的とするものである。The object of the present invention is to improve the wear resistance as well as the breakage resistance by incorporating Cr carbide ceramic particles into the thermal spray alloy described in Japanese Patent Publication No. 59-14101.
問題点を解決するための手段
本発明は、熱鋼片処理用ロールの胴部表面に１基又はＣ
ｏ基の自溶合金中に耐摩耗性に優れたＣｒ炭化物系セラ
ミックス粒子を２〜８０％（体積％）含有した複合材を
０．２〜５．０層層の厚さに溶射肉盛した耐折損性・耐
摩耗性に優れた熱鋼片処理用溶射ロールに関するもので
ある。Means for Solving the Problems The present invention provides one or more C.
A composite material containing 2 to 80% (volume %) of Cr carbide ceramic particles with excellent wear resistance in an o-based self-fluxing alloy was thermally sprayed to a thickness of 0.2 to 5.0 layers. This invention relates to a thermal spray roll for hot steel billet processing that has excellent breakage resistance and wear resistance.
この溶射層の中に熱間強度・硬度の優れたＣｒｙ化物系
セラミックス粒子を含有することにより耐摩耗性の向上
を図るものである。The abrasion resistance is improved by containing cryide-based ceramic particles having excellent hot strength and hardness in this thermal sprayed layer.
なおりロム炭化物系セラミックス中のクロム炭化物とし
ては、Ｃｒ５Ｃ２ノ他に、Ｃｒ７Ｃ３、Ｃｒ２３ Ｃ７
等があり、いずれも熱間強度・硬度にすぐれたものであ
るが、通常は安定な型であるＣ ｒ３ Ｃ２が多く用い
られる。またクロム炭化物系セラミックス中のクロム炭
化物はその特性を発揮するため通常少くとも５０％以ト
含イ１することが必要である。In addition to Cr5C2, chromium carbides in Naori ROM carbide ceramics include Cr7C3, Cr23 C7
All of them have excellent hot strength and hardness, but C r3 C2, which is a stable type, is usually used. Further, in order for chromium carbide in chromium carbide ceramics to exhibit its properties, it is usually necessary to contain at least 50% chromium carbide.
本発明は、前述したように、連続鋳造の鋳片引抜き（軽
圧下）ロール、熱鋼片の搬送ロール、鋼片加熱炉内移送
ロール等、熱鋼片の各種の取扱い処理プロセスに広く適
用可能である。かつ、適用個所に対応して最適範囲が、
それぞれある。As mentioned above, the present invention is widely applicable to various handling processes for hot steel billets, such as continuous casting billet drawing (light reduction) rolls, hot billet conveyance rolls, billet heating furnace transfer rolls, etc. It is. And, the optimal range is determined according to the application location.
There are each.
溶射肉盛するロール素材は、高クロムステンレス系の肉
盛溶接ロール、遠心鋳造スリーブロール、鋳鋼ロール等
に用いられる耐熱・耐摩耗拳耐食・耐熱亀裂性に優れた
ロール素材が好ましい。The roll material to be thermally sprayed is preferably a roll material with excellent heat resistance, abrasion resistance, corrosion resistance, and heat cracking resistance, which is used for high chromium stainless steel overlay welding rolls, centrifugal casting sleeve rolls, cast steel rolls, etc.
本発明におけるＣｒ炭化物系セラミックス粒子含有の溶
射層の材質は、耐食・耐熱・耐摩耗・耐密着性が優れて
いることが必要で、かつＣｒ炭化物系セラミックス粒子
とのぬれ性ψなじみ性を考慮してＬ基又はＣｏ基の自溶
合金を溶射材料とする。The material of the sprayed layer containing Cr carbide ceramic particles in the present invention must have excellent corrosion resistance, heat resistance, wear resistance, and adhesion resistance, and must take into consideration wettability ψ compatibility with the Cr carbide ceramic particles. Then, an L-based or Co-based self-fluxing alloy is used as a thermal spraying material.
Ｃｒ炭化物系セラミックス粒子含有の溶射材料の例を表
１に示す０本発明において、Ｎｉ基又はＣｏ基の自溶合
金とは、Ｎｉ又はＣｏを例えば自溶合金中に５０％程度
以上含有するものを指す。Examples of thermal spray materials containing Cr carbide ceramic particles are shown in Table 1. In the present invention, a Ni-based or Co-based self-fluxing alloy refers to a self-fluxing alloy containing approximately 50% or more of Ni or Co, for example. refers to
連続鋳造の鋳片引抜きロールの場合は、この高強度ｅ高
硬度のＣｒ炭化物系セラミックスをＮｉ基、Ｃｏ基の金
属材料と複合化することにより、耐摩耗性・高温強度性
能を向上させるものの、含有量が２体積％未溝の場合は
、耐摩耗性の効果が得られず、さらに含有量が多くなる
と皮膜強度が小さくなり割れ・剥離の問題が発生するの
で６０体積％以下が好ましい。In the case of continuous casting slab drawing rolls, wear resistance and high-temperature strength performance are improved by combining this high-strength and high-hardness Cr carbide ceramic with Ni-based and Co-based metal materials. If the content is 2% by volume without grooves, no wear resistance effect can be obtained, and if the content is too large, the film strength will decrease and problems of cracking and peeling will occur, so it is preferably 60% by volume or less.
又、溶射層の厚みが０．２■未満ではロールが高温の鋳
片と接触した場合に、溶射層下のロール素材に対する熱
影響を阻止する効果がほとんど無く、そのため従来のロ
ールに発生する如きシャープなりラックが発生し、耐折
損性の向上を期待することが出来ない、又、耐摩耗性も
期待できない。In addition, if the thickness of the sprayed layer is less than 0.2cm, it will have little effect in preventing thermal effects on the roll material under the sprayed layer when the roll comes into contact with a hot slab, and therefore the thermal spraying layer will not have the same effect as the one that occurs with conventional rolls. Sharpness and racking occur, and improvement in breakage resistance cannot be expected, nor can wear resistance be expected.
一方、５．０ｍｍを超えると厚みが厚すざるので溶射層
を溶融しても母材との境界に密着性の強い合金層を生成
せしめることができず、したがって剥離を起こしやすく
なる。On the other hand, if the thickness exceeds 5.0 mm, the thickness becomes so thick that even if the sprayed layer is melted, it will not be possible to form an alloy layer with strong adhesion at the boundary with the base material, and peeling will therefore occur easily.
熱鋼片の搬送ロール、加熱炉内鋼片移送ロールの場合は
、高温下での高硬度が必要であるため。In the case of hot steel billet transfer rolls and heating furnace steel billet transfer rolls, high hardness is required at high temperatures.
高強度、高硬度のＣｒ炭化物系セラミックスの含有量は
５０％以上が好ましく、これにより高温強度性能が得ら
れる。また、含有量が多くなると皮膜強度が小さくなり
割れ、剥離の問題が発生するので８０％までとする。The content of high-strength, high-hardness Cr carbide-based ceramics is preferably 50% or more, whereby high-temperature strength performance can be obtained. Furthermore, if the content is too high, the strength of the film decreases, causing cracking and peeling problems, so the content should not exceed 80%.
本発明の特長を列記すると以下の通りである。The features of the present invention are listed below.
■高クロームステンレス系の肉盛溶接又は遠Ｉ）鋳造ス
リーブ又は鍛鋼ロール等の耐熱・耐摩耗・耐食性・耐熱
亀裂に優れたロール表面にＣｒ炭化物系セラミックス粒
子を含有したＮｉ基又はＣｏ）＆の自溶合金溶射材料を
溶射肉盛した熱鋼片処理用ロールである。■ Overlay welding of high chromium stainless steel or cast sleeves or forged steel rolls that have excellent heat resistance, wear resistance, corrosion resistance, and heat crack resistance. This is a roll for hot steel billet processing that is coated with a self-fluxing alloy sprayed material.
■ロール胴径は１００〜８００５ｍφ及び胴長は５００
〜５０００ｓ＋ｓｉが適当である。■Roll body diameter is 100~8005mφ and body length is 500mm
~5000s+si is appropriate.
■Ｃｒ炭化物系セラミックス粒子含有の溶射層ドのロー
ルの材質の硬さはＨｇ３０〜８ｏが適当である。(2) The appropriate hardness of the roll material for the sprayed layer containing Cr carbide ceramic particles is 30 to 8 degrees Hg.
■溶射材はＮｉ基又はＣｏ基の自溶合金型とする。(2) The thermal spray material shall be a Ni-based or Co-based self-fluxing alloy.
■溶射層の硬さはＨ３４０以上が適当である。(2) The appropriate hardness of the sprayed layer is H340 or higher.
次に本発明の実施例にもとすいて説明する。Next, examples of the present invention will be explained.
実施例１
本発明を連続鋳造用ロールに実施した例を以下に述べる
。Example 1 An example in which the present invention was applied to a continuous casting roll will be described below.
３６０＋ｓｍφＸ １８００ｍ社の４木のロール胴部表
面に肉厚５■の溶接肉感（表１−Ｎｏｔ）を行い、その
中の３木のうち１本は、さらに特公昭５９−１４１０１
号記載の溶射層＆（表１−Ｎｏ２）を肉厚０．２層厘行
い。360 + smφ
Thermal sprayed layer & (Table 1-No. 2) described in No. 1 was applied to a thickness of 0.2.
他の２本は、溶接肉感の上にＡ１ｙ０３ｍ維及びＣｒ炭
化物系セラミックス粒子を含有したＮｉ基自溶合金（表
１−Ｎｏ３およびＮｏ４）を肉厚１．０層厘に溶射肉盛
し、その後例えばバーナー火炎または高周波加熱により
溶融処理をした。For the other two, Ni-based self-fluxing alloy containing A1y03m fibers and Cr carbide ceramic particles (Table 1 - No. 3 and No. 4) was thermally sprayed overlay to a thickness of 1.0 layer on the weld surface, and then For example, the melting process was performed using a burner flame or high frequency heating.
この４本のロールを使用条件の最も苛酷な連続鋳造機の
湾曲部に組み込み使用したところ、肉盛溶接のみのロー
ル１は第１図（１）の如（５００チヤージの時点で円周
方向のシャープな熱亀裂３（クラック深さ最高５ ａｍ
）が発生し、３０００チヤージで第１図（２）に示す如
く最大クラックの深さが３０■−に達したため折損の危
険があり取外した。When these four rolls were installed in a curved part of a continuous casting machine with the most severe operating conditions, roll 1 with only overlay welding was as shown in Figure 1 (1) (at 500 charges, the circumferential direction was Sharp thermal crack 3 (crack depth max. 5 am)
) occurred, and at 3,000 charges, the maximum crack depth reached 30 cm as shown in Figure 1 (2), so it was removed due to the risk of breakage.
又、特公昭５９−１４１０１号公報記載の溶射肉盛ロー
ル１′は第２図（１）〜（３）に示す様に亀裂は少なく
良好なるもロールの摩耗量が５００チヤージでは、径で
０．２層■減少〔第２図（１） ） 、 ３０００チヤ
ージでは、径で１，２腸濡減少〔第２図（２） ） 、
５０００チヤージでは、径で２．０■減少〔第２図（
３）〕まで進行したため操業上の制約から取外した。Furthermore, as shown in Fig. 2 (1) to (3), the thermal spray overlay roll 1' described in Japanese Patent Publication No. 59-14101 is in good condition with few cracks, but when the wear amount of the roll is 500 charges, the diameter is 0. .2 layer ■ decrease [Figure 2 (1)), At 3000 charges, the diameter decreased by 1 or 2 layers [Figure 2 (2)),
At 5,000 charges, the diameter decreases by 2.0cm [Figure 2 (
3)], it was removed due to operational constraints.
又、Ｎｉ基（５０％Ｎｉ含有）自溶合金の溶射層２を肉
盛したロール１″は第３図（１）の如く５００チヤージ
では深さ０．２１の微細クラックが溶射層２に多数発生
し、３０００チヤージでは第３図（２）に示す如く溶射
層２の摩耗はほとんど無く、第３図（２）で最大亀裂深
さ１．０１と良好に経過し５０００チヤージでも最大亀
裂深さ５．０ｍｍ （第３図（３）〕、１０００チャー
ジでも第３図（４）に示す様に亀裂深さ１０層厘と良好
な結果である。In addition, the roll 1'' on which the sprayed layer 2 of Ni-based self-fluxing alloy (containing 50% Ni) was overlaid had many fine cracks with a depth of 0.21 in the sprayed layer 2 at 500 charges, as shown in Figure 3 (1). As shown in Fig. 3 (2), there was almost no wear of the sprayed layer 2 at 3000 charges, and the maximum crack depth progressed smoothly with a maximum crack depth of 1.01 in Fig. 3 (2), and even at 5000 charges, the maximum crack depth remained. 5.0 mm (Figure 3 (3)), and even with 1000 charges, the crack depth was 10 layers as shown in Figure 3 (4), which is a good result.
本発明のＣｒ炭化物系セラミックス粒子含有の溶射材料
を使用して溶射処理したＮｉ基（６７％Ｎｉ含有）自溶
合金の溶射層３を肉盛したロール１ ”は第４図（１）
の如く５００チヤージでは深さ０．２１の微細クラック
が溶射層３に多数発生し、 ３０００チヤージでは第４
図（２）に示す如く溶射層３の摩耗はほとんど無く、第
４図（２）で最大亀裂深さ １．０１腸と良好に経過し
、５０００チヤージでも最大亀裂深さ５．Ｄｍ （第４
図（３） ） 、 １３０００チヤージでも第４図（４
）に示す様に亀裂深さ１０ｍｍと良好な結果である。Figure 4 (1) shows a roll 1" on which a sprayed layer 3 of a Ni-based self-fluxing alloy (containing 67% Ni) is sprayed using the sprayed material containing Cr carbide ceramic particles of the present invention.
At 500 charges, many fine cracks with a depth of 0.21 occur in the sprayed layer 3, and at 3000 charges, the fourth
As shown in Figure (2), there was almost no wear on the sprayed layer 3, and the maximum crack depth in Figure 4 (2) was 1.01 mm, which progressed well, and even after 5,000 charges, the maximum crack depth was 5.0 mm. Dm (4th
Figure (3) ), 13000 charge also shows Figure 4 (4
), the crack depth was 10 mm, which is a good result.
（以下余白）
発明の効果
以上述べたように本発明品は耐摩耗性・耐折損性に優れ
ており、従来品のものに比し耐摩耗性は例えば５０００
チヤージから１３０００チヤージへのび、耐折損性も１
３０００チャージ以−ヒは確保可能となるなどきわめて
すぐれた効果を得た。(The following is a blank space) Effects of the Invention As mentioned above, the product of the present invention has excellent wear resistance and breakage resistance, and the wear resistance is, for example, 5000
Extends from charge to 13,000 charges, and has breakage resistance of 1
It was possible to secure more than 3,000 charges, resulting in extremely good results.
第１図はロール胴部表面に溶射層を肉盛しない場合の５
００チヤージ、 ３０００チヤージにおけるクラック分
布の経過を示す図、第２図は特公昭５８−１４１０１号
公報記載による溶射ロールの５００チヤージ、３０００
チヤージ、５０００チヤージにおける摩耗状況を示す図
、第３図はロールｌＦ４部表面にＭ、０３のファイバー
状のセラミックス含有の溶射層を肉盛した場合の５００
チヤージ、３０００チヤージ、５０００チヤージ、
＋００００チヤージ毎のクラック分布の経過を示す図、
第４図は本発明に従いロール胴部表面にＣｒ炭化物系の
セラミックス粒子含有の溶射層を肉盛した場合の５００
チヤージ、３０００チヤージ、５０００チヤージ、 １
３０００チヤージ毎のクラック分布の経過を示す図であ
る。
１．１′、１″争・拳ロール、２−争・溶射層、３・・
・亀裂、４・・・摩耗。Figure 1 shows 5 when no thermal spray layer is built up on the surface of the roll body.
Figure 2 shows the progress of crack distribution at 500 charge and 3000 charge of the thermal spray roll described in Japanese Patent Publication No. 58-14101.
Figure 3 shows the wear condition at 5000 charge and 5000 charge when a thermal sprayed layer containing M, 03 fiber-like ceramics is deposited on the surface of roll IF4.
Charge, 3000 charge, 5000 charge,
A diagram showing the progress of crack distribution for each +0000 charge,
Figure 4 shows a case of 500 mm when a sprayed layer containing Cr carbide ceramic particles is deposited on the surface of the roll body according to the present invention.
Charge, 3000 charge, 5000 charge, 1
It is a figure showing the course of crack distribution every 3000 charges. 1.1′, 1″ fight/fist roll, 2-fight/sprayed layer, 3...
・Crack, 4...Abrasion.
Claims (1)
耗性に優れたクロム炭化物系セラミックスを２〜８０体
積％含有した複合材を０．２〜５．０ｍｍの厚さに溶射
肉盛した耐摩耗性・耐折損性に優れた熱鋼片処理用溶射
ロール。A composite material containing 2 to 80 volume % of chromium carbide ceramics with excellent wear resistance in a Ni-based or Co-based self-fluxing alloy is thermally sprayed onto the roll body surface to a thickness of 0.2 to 5.0 mm. A thermal spray roll for processing hot steel billets with excellent wear resistance and breakage resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22828586A JPS6386856A (en) | 1986-09-29 | 1986-09-29 | Thermally sprayed roll for treating hot steel slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22828586A JPS6386856A (en) | 1986-09-29 | 1986-09-29 | Thermally sprayed roll for treating hot steel slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6386856A true JPS6386856A (en) | 1988-04-18 |
Family
ID=16874076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22828586A Pending JPS6386856A (en) | 1986-09-29 | 1986-09-29 | Thermally sprayed roll for treating hot steel slab |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6386856A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH032362A (en) * | 1989-05-29 | 1991-01-08 | Nippon Steel Corp | Thermally sprayed roll for steel material treatment and its production |
| JPH04285113A (en) * | 1991-03-12 | 1992-10-09 | Nippon Steel Corp | Hearth roll for thick steel plate heat treatment furnace |
| JP2006263807A (en) * | 2005-03-22 | 2006-10-05 | Nippon Steel Hardfacing Co Ltd | Roll for continuous casting having excellent wear resistance |
| WO2007101512A1 (en) | 2006-03-09 | 2007-09-13 | Sms Demag Ag | Roll for metal processing, in particular a continuous casting roll, and method of producing such a roll |
| US8104530B2 (en) * | 2005-12-19 | 2012-01-31 | Siemens Aktiengesellschaft | Component of a steelworks, such as a continuous casting installation or a rolling mill, method for producing such a component and installation for creating or processing semifinished metallic products |
-
1986
- 1986-09-29 JP JP22828586A patent/JPS6386856A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH032362A (en) * | 1989-05-29 | 1991-01-08 | Nippon Steel Corp | Thermally sprayed roll for steel material treatment and its production |
| JPH0564706B2 (en) * | 1989-05-29 | 1993-09-16 | Shinnippon Seitetsu Kk | |
| JPH04285113A (en) * | 1991-03-12 | 1992-10-09 | Nippon Steel Corp | Hearth roll for thick steel plate heat treatment furnace |
| JP2006263807A (en) * | 2005-03-22 | 2006-10-05 | Nippon Steel Hardfacing Co Ltd | Roll for continuous casting having excellent wear resistance |
| JP4724453B2 (en) * | 2005-03-22 | 2011-07-13 | 日鉄ハード株式会社 | Continuous casting roll with excellent wear resistance |
| US8104530B2 (en) * | 2005-12-19 | 2012-01-31 | Siemens Aktiengesellschaft | Component of a steelworks, such as a continuous casting installation or a rolling mill, method for producing such a component and installation for creating or processing semifinished metallic products |
| WO2007101512A1 (en) | 2006-03-09 | 2007-09-13 | Sms Demag Ag | Roll for metal processing, in particular a continuous casting roll, and method of producing such a roll |
| DE102006011384B4 (en) | 2006-03-09 | 2019-09-05 | Sms Group Gmbh | Roll for metalworking, in particular continuous casting roll |
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