JPH02121798A - Build-up roll for coiler - Google Patents
Build-up roll for coilerInfo
- Publication number
- JPH02121798A JPH02121798A JP27663188A JP27663188A JPH02121798A JP H02121798 A JPH02121798 A JP H02121798A JP 27663188 A JP27663188 A JP 27663188A JP 27663188 A JP27663188 A JP 27663188A JP H02121798 A JPH02121798 A JP H02121798A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- welding
- overlay
- chromium carbide
- powder
- 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
- 238000003466 welding Methods 0.000 claims abstract description 65
- 239000000463 material Substances 0.000 claims abstract description 45
- 239000000843 powder Substances 0.000 claims abstract description 38
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910003470 tongbaite Inorganic materials 0.000 claims abstract description 36
- 239000000203 mixture Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000011651 chromium Substances 0.000 claims abstract description 21
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 20
- 150000001875 compounds Chemical class 0.000 claims abstract description 19
- 229910052742 iron Inorganic materials 0.000 claims abstract description 15
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 12
- 229910052758 niobium Inorganic materials 0.000 claims description 9
- 229910052720 vanadium Inorganic materials 0.000 claims description 7
- 239000010941 cobalt Substances 0.000 claims description 5
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims 3
- 238000005253 cladding Methods 0.000 claims 2
- 230000001376 precipitating effect Effects 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 18
- 239000002184 metal Substances 0.000 description 18
- 229910000831 Steel Inorganic materials 0.000 description 11
- 229910045601 alloy Inorganic materials 0.000 description 11
- 239000000956 alloy Substances 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 6
- 239000011195 cermet Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 239000012895 dilution Substances 0.000 description 5
- 238000010790 dilution Methods 0.000 description 5
- 239000010955 niobium Substances 0.000 description 5
- 150000001247 metal acetylides Chemical class 0.000 description 4
- 206010040844 Skin exfoliation Diseases 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000007751 thermal spraying Methods 0.000 description 3
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- UNASZPQZIFZUSI-UHFFFAOYSA-N methylidyneniobium Chemical compound [Nb]#C UNASZPQZIFZUSI-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/32—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C
- B23K35/327—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C comprising refractory compounds, e.g. carbides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3046—Co as the principal constituent
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、製鉄熱延設備におけるコイラー（熱間圧延後
の鋼板をコイル状に巻取るための設備）に用いる肉盛ロ
ールの改良に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to improvement of a build-up roll used in a coiler (equipment for winding a hot-rolled steel plate into a coil shape) in hot-rolling equipment for iron manufacturing.
（従来の技術）
一般にコイラーは、第１図に略示するように対設したピ
ンチロール１．２と複数のラッパーロール３及びマンド
レル４とから構成されており、熱間圧延後の鋼板５の先
端はピンチロール１．２間を通過後、マンドレル４とラ
ッパーロール３の隙間を通ってマンドレル４に巻き付く
。 鋼板５がゆるみなく巻き付くまでには鋼板を数巻き
する必要があり、その間はラッパーロール３で鋼板を押
し付ける。 そして、数巻き巻いた後にラッパロール３
は退避し、マンドレルとピンチロールで張力を維持しな
がら鋼板をコイル状に巻くのであるが、従来は、このピ
ンチロール、ラッパーロールに５ＫＤ−６１相当の肉盛
溶接材、または８０Ｍ材、ダクタイル鋳鉄材が用いられ
ている。(Prior Art) Generally, a coiler is composed of pinch rolls 1.2, a plurality of wrapper rolls 3, and a mandrel 4, which are arranged opposite to each other as schematically shown in FIG. The tip passes between the pinch rolls 1.2, passes through the gap between the mandrel 4 and the wrapper roll 3, and wraps around the mandrel 4. It is necessary to wrap the steel plate several times until the steel plate 5 is wound without loosening, and during this time the steel plate is pressed with the wrapper roll 3. Then, after winding several rolls, trumpet roll 3
is withdrawn, and the steel plate is wound into a coil while maintaining tension using a mandrel and pinch rolls. Conventionally, the pinch rolls and wrapper rolls are coated with overlay welding material equivalent to 5KD-61, 80M material, or ductile cast iron. material is used.
（発明が解決しようとする問題点）
然しながら、これらの材料を用いて構成したコイラー用
肉盛ロールの場合は、ロール胴部に摩耗や焼付きが発生
し易く、コイルの形状が悪化したり、疵が発生するとい
う難点があり、このためにロールの寿命は、ピンチロー
ルで１〜２ケ月、ラッパーロールでも６〜８ケ月と短い
といった問題がある。(Problems to be Solved by the Invention) However, in the case of overlay rolls for coilers constructed using these materials, wear and seizure are likely to occur on the roll body, resulting in deterioration of the shape of the coil and There is a problem that scratches occur, and as a result, the life of the rolls is short, 1 to 2 months for pinch rolls and 6 to 8 months for wrapper rolls.
一方、耐摩耗性、耐焼付性に優れた材料としては、一般
にセラミックスの焼結体、セラミックスまたはサーメッ
トの溶射皮膜が知られているが、コイラーにおいてピン
チロール、ラッパーロールに接する鋼板の速度は１分間
に８００〜１２００ｍと速いので鋼板の先端がロールに
衝突する時は大きな衝撃が発生する。 そのため、耐衝
撃性の劣るセラミックスの焼結体やセラミックスまたは
サーメットの溶射皮膜では破壊や剥離等の問題を生じる
ので有効な対策とは云えない。 また、このような問題
を解決する方法として、特開昭６２−０６１７２７号公
報に示されているように、ピンチロールを軸方向にシフ
トすることが提案されているが、ロール表面に焼付き疵
が発生するとその部位が鋼板に接しない位置までシフト
する必要があるため実用性に欠け、現実的でない。On the other hand, sintered ceramics and thermally sprayed coatings of ceramics or cermet are generally known as materials with excellent wear resistance and seizure resistance, but the speed of the steel plate in contact with the pinch roll and wrapper roll in the coiler is 1 Since the speed is 800 to 1200 m per minute, a large impact is generated when the tip of the steel plate collides with the roll. Therefore, ceramic sintered bodies or thermal spray coatings of ceramics or cermets, which have poor impact resistance, cause problems such as breakage and peeling, and cannot be said to be effective countermeasures. In addition, as a method to solve such problems, it has been proposed to shift the pinch rolls in the axial direction, as shown in Japanese Patent Application Laid-Open No. 62-061727, but this method may cause seizing scratches on the roll surface. When this occurs, it is necessary to shift the part to a position where it does not touch the steel plate, which is impractical and impractical.
本発明は、上記の諸問題を解決することを課題として開
発されたもので、鋼板の衝撃に耐えうる耐衝撃性を有し
、かつ耐摩耗性、耐焼付性に優れたコイラー用ピンチロ
ール、マンドレルおよびラッパーロールの材質に改良を
加えたコイラー用の各種肉盛ロールを提供することを目
的とする。The present invention was developed with the aim of solving the above-mentioned problems, and includes a pinch roll for coilers that has impact resistance that can withstand the impact of steel plates, and has excellent wear resistance and seizure resistance. The purpose of the present invention is to provide various overlay rolls for coilers with improved materials for the mandrel and wrapper roll.
（課題を解決するための手段）
上記の目的を達成する手段として、本発明では、炭化ク
ロム等のＣｒとＣを含有する化合物とコバルトを主成分
とする粉末を溶接材料として、プラズマ粉体肉盛溶接法
で溶着することにより形成された肉盛層によって胴部表
面が構成されたコイラー用肉盛ロールを開発採用したも
のであって、プラズマ粉体肉盛溶接法を用いたこと、そ
して炭化クロム等ＣｒとＣを含有する化合物とコバルト
を主成分とする粉末を溶接材料として肉盛したことによ
って、多量の炭化クロムが析出した肉盛層をロール胴部
表面に形成したことを特徴とするものである。(Means for Solving the Problems) As a means for achieving the above object, the present invention uses a powder mainly composed of cobalt and a compound containing Cr and C such as chromium carbide as a welding material to form a plasma powder welding material. This product has developed and adopted a build-up roll for coilers whose body surface is formed by a build-up layer formed by welding using a build-up welding method, and uses a plasma powder build-up welding method and carbonization. A build-up layer in which a large amount of chromium carbide is precipitated is formed on the surface of the roll body by overlaying powder mainly composed of cobalt and a compound containing Cr and C such as chromium as a welding material. It is something.
ざらに具体的には、上記の構成に係るコイラー用肉盛ロ
ールにおいて、
（１）溶接材料として、炭化クロム等のｃｒとＣを含有
する化合物を２０〜４０％含有し、かつトータル成分比
（重量％）で、Ｃ２〜６％、Ｃｒ３５〜５５％、Ｃｏ３
０〜５５％、Ｗ２．５〜７％、ＦｅとＮｉの合計が１５
％以下の組成を有する粉末を用いたことを特徴とするコ
イラー用肉盛ロール、
（２）溶接材料として、炭化クロム等のＣｒとＣを含有
する化合物を２０〜４０％含有し、かつトータル成分比
（重量％）で、Ｃ２〜６％、Ｃｒ３５〜５５％、Ｃｏ３
０〜５５％、Ｍｏ１〜８％、ＦｅとＮｉの合計が１５％
以下の組成を有する粉末を用いたことを特徴とするコイ
ラー用肉盛ロール、
（３）溶接材料として、炭化クロム等のＣｒとＣを含有
する化合物を２０〜４０％含有し、かつトータル成分比
（Ｗ量％〉で、Ｃ２〜６％、Ｃｒ３５〜５５％、Ｃｏ３
０〜５５％、Ｎｂ。More specifically, in the overlay roll for a coiler having the above configuration, (1) the welding material contains 20 to 40% of a compound containing Cr and C such as chromium carbide, and the total component ratio ( weight%), C2-6%, Cr35-55%, Co3
0-55%, W2.5-7%, total of Fe and Ni is 15
(2) A welding material containing 20 to 40% of a compound containing Cr and C, such as chromium carbide, and a total composition of Ratio (weight%): C2-6%, Cr35-55%, Co3
0-55%, Mo1-8%, total of Fe and Ni is 15%
A build-up roll for a coiler characterized by using powder having the following composition: (3) Containing 20 to 40% of a compound containing Cr and C such as chromium carbide as a welding material, and having a total component ratio of (W amount %> C2-6%, Cr35-55%, Co3
0-55% Nb.
Ｖ、Ｔｒのうちの少なくとも１種以上の総量が１〜８％
、ＦｅとＮｉの合計が１５％以下の組成を有する粉末を
用いたことを特徴とするコイラー用肉盛ロール、
（４）溶接材料として、炭化クロム等のＯｒとＣを含有
する化合物を２０〜４０％含有し、かつトータル成分比
（重量％）で、Ｃ２〜６％、Ｃｒ３５〜５５％、Ｃｏ３
０〜５５％、Ｗ２．５〜７％、Ｍｏ１〜８％、ＦｅとＮ
ｉの合計が１５％以下の組成を有する粉末を用いたこと
を特徴とするコイラー用肉盛ロール、（５）溶接材料と
して、炭化クロム等のＣｒとＣを含有する化合物を２０
〜４０％含有し、かつトータル成分比（重量％）で、０
２〜６％、Ｃｒ３５〜５５％、００３０〜５５％、Ｗ２
゜５〜７％、Ｎｂ、Ｖ、 ■；のうちの少なくとも１種
以上の総量が１〜８％、ＦｅとＮｉの合計が１５％以下
の組成を有する粉末を用いたことを特徴とするコイラー
用肉盛ロール、（６）溶接材料として、炭化クロム等の
ＯｒとＣを含有する化合物を２０〜４０％含有し、かつ
トータル成分比（重量％）で、Ｃ２〜６％、Ｃｒ３５〜
５５％、Ｃｏ３０〜５５％、Ｍｏ１〜８％、Ｎｂ、Ｖ、
ｒ＊のうちの少なくとも１種以上の総量が１〜８％、Ｆ
ｅとＮｉの合計が１５％以下の組成を有する粉末を用い
たことを特徴とするコイラー用肉盛ロール、及び
（７）溶接材料として、炭化クロム等のＣｒとＣを含有
する化合物を２０〜４０％含有し、かつトータル成分比
（重量％）で、Ｃ２〜６％、Ｃｒ ３５〜５５％、Ｃｏ
３０〜５５％、Ｗ２．５〜７％、Ｍｏ１〜８％、Ｎｂ、
Ｖ。The total amount of at least one of V and Tr is 1 to 8%
, a build-up roll for a coiler characterized by using a powder having a composition in which the total of Fe and Ni is 15% or less, (4) a compound containing Or and C such as chromium carbide as a welding material, Contains 40%, and the total component ratio (weight%) is C2-6%, Cr35-55%, Co3
0-55%, W2.5-7%, Mo1-8%, Fe and N
A build-up roll for a coiler, characterized in that a powder having a composition in which the sum of i is 15% or less is used, (5) a compound containing Cr and C, such as chromium carbide, is used as a welding material at 20%
Contains ~40%, and the total component ratio (weight%) is 0
2-6%, Cr35-55%, 0030-55%, W2
A coiler characterized by using powder having a composition in which the total amount of at least one of Nb, V, and (2) is 1 to 8%, and the total amount of Fe and Ni is 15% or less. (6) As a welding material, it contains 20 to 40% of a compound containing Or and C such as chromium carbide, and the total component ratio (weight %) is C2 to 6%, Cr35 to
55%, Co30-55%, Mo1-8%, Nb, V,
The total amount of at least one of r* is 1 to 8%, F
(7) A build-up roll for a coiler characterized by using a powder having a composition in which the sum of e and Ni is 15% or less; Contains 40%, and the total component ratio (weight%) is C2-6%, Cr 35-55%, Co
30-55%, W2.5-7%, Mo1-8%, Nb,
V.
Ｔｉのうちの少なくとも１種以上の総量が１〜８％、Ｆ
ｅとＮｉの合計が１５％以下の組成を有する粉末を用い
たことを特徴とするコイラー用肉盛ロールを採用したも
のである。The total amount of at least one of Ti is 1 to 8%, F
This overlay roll for a coiler is characterized by using powder having a composition in which the sum of e and Ni is 15% or less.
次に、本発明を完成するに到った経過及び本発明の具体
的構成についてざらに詳述する。Next, the progress that led to the completion of the present invention and the specific structure of the present invention will be briefly described in detail.
本発明の発明者は、先づ耐摩耗性、耐焼付性に優れたセ
ラミックスを含有し、かつ、耐衝撃性に優れた合金層を
ロール胴部に形成するために、プラズマ粉体肉盛溶接手
段を選定し、その性能を検討した。The inventor of the present invention first developed plasma powder overlay welding in order to form an alloy layer on the roll body that contains ceramics with excellent wear resistance and seizure resistance and has excellent impact resistance. A method was selected and its performance was examined.
このような合金層を形成するには、溶射手段を用いるの
が一般的な方法でおるが、溶射法では溶射によって形成
される皮膜と母材との間の結合強度が十分でなく、衝撃
によって剥離する危険性があり、このため、肉盛層と母
材が融合して強固な結合強度の得られる各種溶接法を試
用したのであるが、各種溶接法のうち、とくにプラズマ
粉体溶接法を採用したのは次の理由に基づく。The common method of forming such an alloy layer is to use thermal spraying, but with thermal spraying the bond strength between the coating formed by thermal spraying and the base material is insufficient, and the alloy layer is easily damaged by impact. There was a risk of peeling, so we tried various welding methods that fuse the build-up layer and the base metal to obtain strong bonding strength. Among the various welding methods, we particularly found plasma powder welding The selection was based on the following reasons.
即ち、耐摩耗性、耐焼付性に優れた肉盛層を形成するに
は肉盛層中に多量の炭化物を含有させることが必要であ
り、しかも溶接時の溶は込みによって生じる母材成分に
よる肉盛溶接金属の稀釈をできる限り抑制して肉盛溶接
金属の化学組成の変動を可能な限り少なくしなければ安
定した性能は期待できない。 上記のような要求を満足
する肉盛層を形成するためには、プラズマ粉体肉盛溶接
法以外の溶接法では困難である。 他の溶接法でこのよ
うな炭化物の添加が可能なものとしては、チューブラ−
ワイヤーを使用できるサブマージアーク溶接法や、チュ
ーブラ−ロッドを使用できるＴＩＧ溶接法がある。In other words, in order to form a build-up layer with excellent wear resistance and seizure resistance, it is necessary to include a large amount of carbide in the build-up layer. Stable performance cannot be expected unless dilution of the overlay weld metal is suppressed as much as possible and fluctuations in the chemical composition of the overlay weld metal are minimized. It is difficult to form a build-up layer that satisfies the above requirements using welding methods other than plasma powder build-up welding. Other welding methods that allow the addition of carbides include tubular welding.
There are submerged arc welding methods that can use wire, and TIG welding methods that can use tubular rods.
しかし、これらの溶接法は溶込み深さが大きく稀釈率は
通常２０％を超えるため、要求を満足できない。However, these welding methods cannot satisfy the requirements because the penetration depth is large and the dilution ratio usually exceeds 20%.
因みにプラズマ粉体自認溶接法を用いた場合の稀釈率は
、１０％以下であり、硬度ムラのない均質な肉盛層を得
ることができる。Incidentally, the dilution rate when using the plasma powder self-identification welding method is 10% or less, and a homogeneous build-up layer without uneven hardness can be obtained.
ざらに、プラズマ粉体肉盛溶接法を用いれば、硬質の材
料の肉盛に際しても溶接金属のｖｌれ感度が低いという
利点もある。In general, if the plasma powder overlay welding method is used, there is an advantage that the weld metal's VL deviation sensitivity is low even when overlaying hard materials.
肉盛材料の選定については以下の通りでおる。The selection of overlay materials is as follows.
溶接材料として使用可能なセラミックスとしては炭化タ
ングステン、炭化クロム、および炭化ニオビウムがある
。 プラズマ粉体肉盛溶接の場合、これらは溶接材料中
に含有されても溶着金属を脆化する度合は比較的低く、
実用性が高い。Ceramics that can be used as welding materials include tungsten carbide, chromium carbide, and niobium carbide. In the case of plasma powder overlay welding, even if these are contained in the welding material, the degree of embrittlement of the weld metal is relatively low;
Highly practical.
以上の知見より、プラズマ粉体肉盛溶接法で溶着された
各種サーメツト材に関する性能試験を実施した。Based on the above findings, we conducted performance tests on various cermet materials welded using plasma powder overlay welding.
結果を第２図〜第４図に示す。（サーメツト材中の各炭
化物の量は全て４０ｗｔ％とし、比較材として５ＫＤ６
１の肉盛溶接材を用いた。）第２図は焼付き試験結果を
示しており、同図から明らかなように炭化物クロム−コ
バルト基合金のサーメツト材は非常に優れた耐焼付性を
有している。The results are shown in FIGS. 2 to 4. (The amount of each carbide in the cermet material is all 40wt%, and 5KD6 is used as a comparison material.
The overlay welding material of No. 1 was used. ) Figure 2 shows the seizure test results, and as is clear from the figure, the cermet material made of chromium carbide-cobalt based alloy has very excellent seizure resistance.
第３図及び第４図は炭化クロムを用い、その添加量を変
えた場合の焼付試験とシャルピー衝撃試験結果を示して
おり、第３図から明らかなように炭化クロム量が少なく
なる程焼付きやすくなる傾向があり、特に２０％より少
なくなると急激に耐焼付性が低下することがわかる。
また、第４図から明らかなように炭化クロム量が増加す
る程耐衝撃性が低下する傾向にあり、４０％より多くな
ると急激に耐衝撃性が低下することがわかる。Figures 3 and 4 show the seizure test and Charpy impact test results using chromium carbide and varying the amount added.As is clear from Figure 3, the smaller the amount of chromium carbide, the more the seizure occurs. It can be seen that when the amount is less than 20%, the seizure resistance decreases rapidly.
Furthermore, as is clear from FIG. 4, as the amount of chromium carbide increases, the impact resistance tends to decrease, and when the amount exceeds 40%, the impact resistance rapidly decreases.
しかも炭化クロム量が４０％より多くなるとシャルピー
衝撃値は０．３に９−ＴＬ／ｃｍ２より小さくなる。Furthermore, when the amount of chromium carbide exceeds 40%, the Charpy impact value becomes 0.3, which is smaller than 9-TL/cm2.
なお、この場合、炭化クロムも含めたトータル成分値と
しては、前記及び特許請求範囲の各請求項に示す範囲内
であれば同様の結果が得られることが判明している。In this case, it has been found that similar results can be obtained as long as the total component value including chromium carbide is within the ranges shown in the above and claims.
一方、ピンチロールに使用された実績を有するダクタイ
ル鋳鉄のシャルピー衝撃値は０．３ＫｇＴｒＬ／ｃｍ２
である。 従って、シャルピー値が０゜３ Ｋ９− ｍ
／ｃｍ２以上であればコイラーピンチロール、ラッパー
ロールとしての耐衝撃性を維持することができる。On the other hand, the Charpy impact value of ductile cast iron, which has been used for pinch rolls, is 0.3KgTrL/cm2.
It is. Therefore, the Charpy value is 0°3 K9- m
/cm2 or more, impact resistance as a coiler pinch roll or wrapper roll can be maintained.
次に、本発明における溶接材料の各成分の特性とその組
成範囲について説明する。Next, the characteristics and composition range of each component of the welding material in the present invention will be explained.
Ｃ： この成分は、炭化物を生成して溶接金属に耐摩耗
性、耐焼付性を付与するとともに、基地に固溶して基地
を強化するものであるが、２％未満では炭化物の生成量
が不足し、耐摩耗性、耐焼付性が損なわれ、６％を越え
ると適用対象ロールの肉盛層に要求される靭性が得られ
ない。C: This component generates carbides to impart wear resistance and seizure resistance to the weld metal, and also strengthens the base by forming a solid solution in the base, but if it is less than 2%, the amount of carbide generated is low. If it is insufficient, wear resistance and seizure resistance will be impaired, and if it exceeds 6%, the toughness required for the built-up layer of the applicable roll cannot be obtained.
Ｃｒ： この成分は、炭化クロムを生成して溶接金属に
耐摩耗性、耐焼付性を付与するとともに、基地に固溶し
て基地を強化するものであるが、３５％未満では炭化ク
ロムの生成量が不足し、耐摩耗性、耐焼付性が損なわれ
、５５％を越えると適用対象ロールの肉盛層に要求され
る靭性が得られない。Cr: This component generates chromium carbide to impart wear resistance and seizure resistance to the weld metal, and also strengthens the base by forming a solid solution in the base, but if it is less than 35%, chromium carbide is generated. If the amount is insufficient, wear resistance and seizure resistance will be impaired, and if it exceeds 55%, the toughness required for the overlay layer of the applicable roll cannot be obtained.
Ｗ、Ｍｏ： これらの成分は、基地に固溶して基地を
強化するとともに、炭化物を生成して溶接金属の耐摩耗
性を向上するものであるが、特許請求の範囲の請求項に
示した下限値を割ると耐摩耗性が低下し、上限値を越え
ると適用対象ロールの肉盛層に要求される靭性が得られ
ない。W, Mo: These components solidly dissolve in the base to strengthen the base and also generate carbides to improve the wear resistance of the weld metal, but they are not included in the claims. When the lower limit value is exceeded, the wear resistance decreases, and when the upper limit value is exceeded, the toughness required for the overlay layer of the applicable roll cannot be obtained.
Ｎｂ、Ｖ、ｒ； ： これらの成分は、炭化物を生成
し、耐摩耗性を向上するものであるが、特許請求の範囲
の請求項に示した下限値を割ると耐摩耗性が低下し、上
限値を越えると適用対象ロールの肉盛層に要求される靭
性が得られない。Nb, V, r: These components generate carbides and improve wear resistance, but when the lower limit shown in the claims is exceeded, the wear resistance decreases, If the upper limit is exceeded, the toughness required for the overlay layer of the applicable roll cannot be obtained.
Ｆｅ、Ｎｉ： これらの成分は、溶接金属の靭性の改
善に効果があるが、その合計が上限値である１５％を越
えると耐焼付性が低下する。Fe, Ni: These components are effective in improving the toughness of the weld metal, but if the total exceeds the upper limit of 15%, the seizure resistance decreases.
Ｃｏ： この成分は、基地を構成する主要成分であり、
耐焼付性に関する基本的な性能を付与する元素であるが
、３０％以下では耐焼付性が著しく低下し、５５％以上
では炭化クロム析出量を相対的に減少するので耐焼付性
が著しく低下する。Co: This component is the main component constituting the base,
It is an element that provides basic performance related to seizure resistance, but if it is less than 30%, the seizure resistance will be significantly reduced, and if it is more than 55%, the amount of chromium carbide precipitated will be relatively reduced, so the seizure resistance will be significantly reduced. .
（作 用）
本発明に係るコイラー用肉盛ロールは、炭化クロム等の
ＣｒとＣを含有する化合物とコバルトを主成分とする粉
末を溶接材料としてロール胴部に肉盛溶接しであるので
、多量の炭化クロムが析出した肉盛層をロール胴部の表
面に形成でき、したがってロール表面に優れた耐摩耗性
、耐焼付性及び耐衝撃性を付与できるので、苛酷な条件
下で使用されるコイラー用の各種ロールとして充分に耐
え得る作用がある。 また、溶接手段としてプラズマ粉
体肉盛溶接方法を採用したので、溶接時の溶込みが少な
く、ロールの母材成分による肉盛溶接金属の稀釈を可及
的に抑制して、上記の優れた特性を有する肉盛溶接金属
の化学組成に変化を及ぼさない作用が必る。(Function) The overlay roll for a coiler according to the present invention is overlay welded to the roll body using a powder mainly composed of cobalt and a compound containing Cr and C, such as chromium carbide, as a welding material. A build-up layer with a large amount of chromium carbide precipitated can be formed on the surface of the roll body, giving the roll surface excellent wear resistance, seizure resistance, and impact resistance, so it can be used under harsh conditions. It has a sufficient ability to withstand various rolls for coilers. In addition, since plasma powder overlay welding is adopted as the welding method, there is little penetration during welding, and dilution of the overlay weld metal due to the roll base metal components is suppressed as much as possible, achieving the above-mentioned excellent results. It is necessary to have an action that does not affect the chemical composition of the overlay weld metal, which has the characteristics.
（実施例１）
鋼板の熱間圧延設備のコイラー用の３０Ｍ４３５の材質
から成るピンチロールの胴部表面に、表−１に示す組成
の合金Ａ（炭化クロム３０％添加）の粉末を溶接材料に
用いてプラズマ粉体肉盛溶接法により肉盛溶接した。
その肉盛金属の組成の分析値を表−２の合金Ａの欄に示
し、その肉盛金属の硬度を表−３の合金Ａの欄に示す。(Example 1) Powder of alloy A (addition of 30% chromium carbide) having the composition shown in Table 1 was applied as a welding material to the body surface of a pinch roll made of 30M435 material for a coiler in hot rolling equipment for steel plates. Overlay welding was performed using the plasma powder overlay welding method.
The analytical values of the composition of the overlay metal are shown in the Alloy A column of Table 2, and the hardness of the overlay metal is shown in the Alloy A column of Table 3.
この肉盛ピンチロールを使用した結果、摩耗は軽微で、
焼付き、損傷等の問題もなく、約１０〜１２ケ月に亘っ
て使用することができた。As a result of using this overlay pinch roll, there was only slight wear.
It could be used for about 10 to 12 months without any problems such as seizure or damage.
この実施例では、特に耐衝撃性に留意して低硬度の合金
Ａを溶接材料に用いたが、実際のコイラー設備において
使用した結果、肉盛層の剥離の問題もなく、かつピンチ
ロールの寿命律速である破損、摩耗、焼付きを著しく軽
減し得て、従来品の耐用命数が１〜２ケ月であるのに対
して、その６倍以上の耐用命数があり、ピンチロールの
取替え周期を大巾に延長し得て、コイラーの設備費用を
著しく低減できた。In this example, alloy A with low hardness was used as the welding material with particular attention to impact resistance, but as a result of using it in actual coiler equipment, there was no problem of peeling of the built-up layer and the life of the pinch roll was It can significantly reduce the rate-limiting factors such as breakage, wear, and seizure, and while the service life of conventional products is 1 to 2 months, it has a service life that is more than 6 times longer than that of conventional products, and greatly reduces the replacement frequency of pinch rolls. It was possible to extend the coiler width significantly, and the equipment cost of the coiler was significantly reduced.
（実施例２）
鋼板の熱間圧延設備のコイラ用の３０Ｍ４３５の材質か
ら成るラッパーロールの胴部表面に、表−１に示す組成
の合金Ｂ（炭化クロム４０％添加）の粉末を溶接材料に
用いてプラズマ粉体肉盛溶接法により肉盛溶接した。
その肉盛金属の組成の分析値を表−２の合金Ｂの欄に示
し、その肉盛金属の硬度を表−３の合金Ｂの欄に示す。(Example 2) Powder of alloy B (addition of 40% chromium carbide) having the composition shown in Table 1 was applied as a welding material to the body surface of a wrapper roll made of 30M435 material for a coiler in hot rolling equipment for steel sheets. Overlay welding was performed using the plasma powder overlay welding method.
The analytical values of the composition of the overlay metal are shown in the Alloy B column of Table 2, and the hardness of the overlay metal is shown in the Alloy B column of Table 3.
この肉盛ラッパーロールを使用した結果、摩耗は軽微で
、焼付き、損傷等の問題もなく、約２０〜２４ケ月に亘
って使用することができた。As a result of using this overlay wrapper roll, it was possible to use it for about 20 to 24 months with only slight wear and no problems such as seizure or damage.
この実施例では、特に耐摩耗性に留意して高硬度の合金
Ｂを溶接材料に用いたが、実際のコイラミ１備において
使用した結果、摩耗度は小さく、かつラッパーロールの
寿命律速である摩耗、焼付きを著しく軽減し得て、従来
品の耐用命数が６〜８ケ月であるのに対して、その３倍
以上の耐用命数があり、ラッパーロールの取替え周期を
大幅に延長し得て、コイラーの設備費用を著しく低減で
きた。In this example, high-hardness Alloy B was used as the welding material, paying special attention to wear resistance. However, as a result of using it in an actual coiler roll, the degree of wear was small, and the wear resistance was the limiting factor in the lifespan of the wrapper roll. , it can significantly reduce seizure, and while the service life of conventional products is 6 to 8 months, it has a service life that is more than three times that, and can significantly extend the replacement cycle of the wrapper roll. Coiler equipment costs were significantly reduced.
一以下余白一
表−１；溶接材わ１の組成（％）
表−２；肉盛金属層の組成（％）
（発明の効果）
本発明は、炭化クロム等のＣｒとＣを含有する化合物と
コバルトを主成分とする粉末を溶接材料として、プラズ
マ粉体肉盛溶接法で溶着することにより形成された肉盛
層によってロールの胴部表面が構成されていることを特
徴とするコイラー用肉盛ロールに係るものであって、ロ
ールの胴部表面は多量の炭化クロムが析出した肉盛金属
層で構成されている関係から、従来のコイラー用の各種
ロールに較べて耐衝撃性、耐摩耗性及び耐焼付性が著し
く優れており、実験の結果では、従来のロールの３倍〜
６倍の耐用命数を有する多大な特長があり、コイラーの
設備上の費用を著しく軽減できるものである。Margin below 1 Table-1; Composition of welding material 1 (%) Table-2; Composition of overlay metal layer (%) (Effects of the invention) A body for a coiler, characterized in that the surface of the body of the roll is constituted by a build-up layer formed by welding a powder mainly composed of and cobalt using a plasma powder build-up welding method. This relates to a build-up roll, and since the body surface of the roll is composed of a build-up metal layer on which a large amount of chromium carbide has precipitated, it has better impact resistance and wear resistance than various rolls for conventional coilers. It has extremely excellent roll resistance and seizure resistance, and experimental results show that it is 3 times faster than conventional rolls.
It has the great advantage of having a service life six times longer, and can significantly reduce the cost of coiler equipment.
また、溶接手段としてプラズマ粉体肉盛溶接法を採用し
たので、溶接時の溶込みが少なく、ロールの母材成分に
よる肉盛溶接金属の稀釈を可及的に抑制し得て上記肉盛
溶接金属の化学組成に変化を及ぼすことが少ないので、
上記の優れた特性を充分に発揮させ得る特長がある。In addition, since plasma powder overlay welding is adopted as the welding method, there is little penetration during welding, and dilution of the overlay weld metal due to the components of the base material of the roll can be suppressed as much as possible. Because it causes little change in the chemical composition of the metal,
It has the advantage of fully exhibiting the above-mentioned excellent properties.
第１図はコイラー設備における各種ロールの一般的配置
例を示す概略側面図、第２図は各種の炭化物サーメット
に関する耐焼付性の試験結果を示すグラフ、第３図は炭
化クロム添加量と炭化クロムの耐焼付性の試験結果を示
すグラフ、第４図は炭化クロム添加量と炭化クロムサー
メットの耐衝撃性の試験結果を示すグラフである。
（符号の説明）
１・２・・・ピンチロール、
３・・・ラッパーロール、
４・・・マンドレル。Figure 1 is a schematic side view showing an example of the general arrangement of various rolls in coiler equipment, Figure 2 is a graph showing seizure resistance test results for various carbide cermets, and Figure 3 is the amount of chromium carbide added and chromium carbide. FIG. 4 is a graph showing the test results of the seizure resistance of the cermet, and FIG. 4 is a graph showing the test results of the amount of chromium carbide added and the impact resistance of chromium carbide cermet. (Explanation of symbols) 1, 2... Pinch roll, 3... Wrapper roll, 4... Mandrel.
Claims (1)
ルトを主成分とする粉末を溶接材料として、プラズマ粉
体肉盛溶接法で溶着することにより形成された肉盛層に
よってロールの胴部表面が構成されていることを特徴と
するコイラー用肉盛ロール。 （２）溶接材料として、炭化クロム等のＣｒとＣを含有
する化合物を２０〜４０％含有し、かつトータル成分比
（重量％）で、Ｃ２〜６％、Ｃｒ３５〜５５％、Ｃｏ３
０〜５５％、Ｗ ２．５〜７％、ＦｅとＮｉの合計が１５％以下の組成を
有する粉末を用いたことを特徴とする請求項（１）に記
載のコイラー用肉盛ロール。 （３）溶接材料として、炭化クロム等のＣｒとＣを含有
する化合物を２０〜４０％含有し、かつトータル成分比
（重量％）で、Ｃ２〜６％、Ｃｒ３５〜５５％、Ｃｏ３
０〜５５％、Ｍｏ１〜８％、ＦｅとＮｉの合計が１５％
以下、の組成を有する粉末を用いたことを特徴とする請
求項（１）に記載のコイラー用肉盛ロール。 （４）溶接材料として、炭化クロム等のＣｒとＣを含有
する化合物を２０〜４０％含有し、かつトータル成分比
（重量％）で、Ｃ２〜６％、Ｃｒ３５〜５５％、Ｃｏ３
０〜５５％、Ｎｂ、Ｖ、Ｔｉのうちの少なくとも１種以
上の総量が１〜８％、ＦｅとＮｉの合計が１５％以下の
組成を有する粉末を用いたことを特徴とする請求項（１
）に記載のコイラー用肉盛ロール。 （５）溶接材料として、炭化クロム等のＣｒとＣを含有
する化合物を２０〜４０％含有し、かつトータル成分比
（重量％）で、Ｃ２〜６％、Ｃｒ３５〜５５％、Ｃｏ３
０〜５５％、Ｗ ２．５〜７％、Ｍｏ１〜８％、ＦｅとＮｉの合計が１５
％以下の組成を有する粉末を用いたことを特徴とする請
求項（１）に記載のコイラー用肉盛ロール。 （６）溶接材料として、炭化クロム等のＣｒとＣを含有
する化合物を２０〜４０％含有し、かつトータル成分比
（重量％）で、Ｃ２〜６％、Ｃｒ３５〜５５％、Ｃｏ３
０〜５５％、Ｗ２．５〜７％、Ｎｂ、Ｖ、Ｔｉのうちの
少なくとも１種以上の総量が１〜８％、ＦｅとＮｉの合
計が１５％以下の組成を有する粉末を用いたことを特徴
とする請求項（１）に記載のコイラー用肉盛ロール。 （７）溶接材料として、炭化クロム等のＣｒとＣを含有
する化合物を２０〜４０％含有し、かつトータル成分比
（重量％）で、Ｃ２〜６％、Ｃｒ３５〜５５％、Ｃｏ３
０〜５５％、Ｍｏ１〜８％、Ｎｂ、Ｖ、Ｔｉのうちの少
なくとも１種以上の総量が１〜８％、ＦｅとＮｉの合計
が１５％以下の組成を有する粉末を用いたことを特徴と
する請求項（１）に記載のコイラー用肉盛ロール。 （８）溶接材料として、炭化クロム等のＣｒとＣを含有
する化合物を２０〜４０％含有し、かつトータル成分比
（重量％）で、Ｃ２〜６％、Ｃｒ３５〜５５％、Ｃｏ３
０〜５５％、Ｗ２．５〜７％、Ｍｏ１〜８％、Ｎｂ、Ｖ
、Ｔｉのうちの少なくとも１種以上の総量が１〜８％、
ＦｅとＮｉの合計が１５％以下の組成を有する粉末を用
いたことを特徴とする請求項（１）に記載のコイラー用
肉盛ロール。[Scope of Claims] (1) An overlay formed by welding a compound containing Cr and C such as chromium carbide and powder mainly composed of cobalt using a plasma powder overlay welding method as a welding material. A cladding roll for a coiler, characterized in that the surface of the body of the roll is composed of layers. (2) As a welding material, it contains 20 to 40% of a compound containing Cr and C such as chromium carbide, and the total component ratio (weight%) is C2 to 6%, Cr35 to 55%, Co3
The overlay roll for a coiler according to claim 1, characterized in that a powder having a composition of 0 to 55%, W 2.5 to 7%, and a total of Fe and Ni of 15% or less is used. (3) As a welding material, it contains 20 to 40% of a compound containing Cr and C such as chromium carbide, and the total component ratio (weight%) is C2 to 6%, Cr35 to 55%, Co3
0-55%, Mo1-8%, total of Fe and Ni is 15%
The cladding roll for a coiler according to claim 1, characterized in that a powder having the following composition is used. (4) As a welding material, it contains 20 to 40% of a compound containing Cr and C such as chromium carbide, and the total component ratio (weight%) is C2 to 6%, Cr35 to 55%, Co3
0 to 55%, the total amount of at least one of Nb, V, and Ti is 1 to 8%, and the total amount of Fe and Ni is 15% or less. 1
) Overlay roll for coilers. (5) As a welding material, it contains 20 to 40% of a compound containing Cr and C such as chromium carbide, and the total component ratio (weight%) is C2 to 6%, Cr35 to 55%, Co3
0 to 55%, W 2.5 to 7%, Mo 1 to 8%, total of Fe and Ni is 15
The overlay roll for a coiler according to claim 1, characterized in that a powder having a composition of % or less is used. (6) As a welding material, it contains 20 to 40% of a compound containing Cr and C such as chromium carbide, and the total component ratio (weight %) is C2 to 6%, Cr35 to 55%, Co3
Powder having a composition of 0 to 55%, W2.5 to 7%, a total amount of at least one of Nb, V, and Ti of 1 to 8%, and a total of Fe and Ni of 15% or less was used. The overlay roll for a coiler according to claim (1), characterized in that: (7) As a welding material, it contains 20 to 40% of a compound containing Cr and C such as chromium carbide, and the total component ratio (weight%) is C2 to 6%, Cr35 to 55%, Co3
A powder having a composition of 0 to 55%, Mo 1 to 8%, a total amount of at least one of Nb, V, and Ti of 1 to 8%, and a total of Fe and Ni of 15% or less is used. The overlay roll for a coiler according to claim (1). (8) As a welding material, it contains 20 to 40% of a compound containing Cr and C such as chromium carbide, and the total component ratio (weight%) is C2 to 6%, Cr35 to 55%, Co3
0-55%, W2.5-7%, Mo1-8%, Nb, V
, the total amount of at least one of Ti is 1 to 8%,
The overlay roll for a coiler according to claim 1, characterized in that a powder having a composition in which the total of Fe and Ni is 15% or less is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27663188A JPH02121798A (en) | 1988-10-31 | 1988-10-31 | Build-up roll for coiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27663188A JPH02121798A (en) | 1988-10-31 | 1988-10-31 | Build-up roll for coiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02121798A true JPH02121798A (en) | 1990-05-09 |
Family
ID=17572136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27663188A Pending JPH02121798A (en) | 1988-10-31 | 1988-10-31 | Build-up roll for coiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02121798A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010001859A1 (en) * | 2008-07-02 | 2010-01-07 | 住友金属工業株式会社 | Member for conveying high-temperature material |
| CN105458456A (en) * | 2015-12-30 | 2016-04-06 | 首钢总公司 | Alloy adding powder for producing wear-resisting composite liner plate |
| JP2022115041A (en) * | 2021-01-27 | 2022-08-08 | 國立清華大學 | High-hardness heat-resistant alloy and use thereof |
-
1988
- 1988-10-31 JP JP27663188A patent/JPH02121798A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010001859A1 (en) * | 2008-07-02 | 2010-01-07 | 住友金属工業株式会社 | Member for conveying high-temperature material |
| CN105458456A (en) * | 2015-12-30 | 2016-04-06 | 首钢总公司 | Alloy adding powder for producing wear-resisting composite liner plate |
| JP2022115041A (en) * | 2021-01-27 | 2022-08-08 | 國立清華大學 | High-hardness heat-resistant alloy and use thereof |
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