JPH0280195A - Cladding by welding metal for continuous casting roll - Google Patents
Cladding by welding metal for continuous casting rollInfo
- Publication number
- JPH0280195A JPH0280195A JP23058588A JP23058588A JPH0280195A JP H0280195 A JPH0280195 A JP H0280195A JP 23058588 A JP23058588 A JP 23058588A JP 23058588 A JP23058588 A JP 23058588A JP H0280195 A JPH0280195 A JP H0280195A
- Authority
- JP
- Japan
- Prior art keywords
- continuous casting
- cladding
- weight
- welding metal
- weld metal
- 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
- 238000009749 continuous casting Methods 0.000 title claims abstract description 32
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 31
- 239000002184 metal Substances 0.000 title claims abstract description 31
- 238000005253 cladding Methods 0.000 title abstract 4
- 238000003466 welding Methods 0.000 title abstract 4
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 20
- 238000005260 corrosion Methods 0.000 abstract description 20
- 229910052804 chromium Inorganic materials 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 3
- 229910052748 manganese Inorganic materials 0.000 abstract 1
- 150000002739 metals Chemical class 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 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
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、連続鋳造ロール用溶接金属に関するもので
ある。さらに詳しくは、この発明は、Ｍ亀裂性および耐
腐食卆耗性の良好な連続鋳造ロール用肉盛溶接金属に関
するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a weld metal for continuous casting rolls. More specifically, the present invention relates to an overlay weld metal for continuous casting rolls that has good M-crack resistance and corrosion and wear resistance.
（従来の技術）
従来より溶融金属からの連続鋳造法が広く知られている
。この連続鋳造法は、鋳型内において半凝固状態になっ
た鋳片をピンチロール、ガイドロール等の連続鋳造ロー
ルによって連続的に引き抜き、これらの連続鋳造ロール
上で鋳片にスプレー状の冷却水を吹き付けて凝固させ、
ライン方向に搬送するものである。(Prior Art) Continuous casting methods from molten metal have been widely known. In this continuous casting method, the semi-solidified slab in the mold is continuously pulled out by continuous casting rolls such as pinch rolls and guide rolls, and sprayed cooling water is applied to the slab on these continuous casting rolls. Spray and solidify,
It is conveyed in the line direction.
このような連続鋳造において、連続鋳造ロールは高温の
鋳片と接触し、かつ接触後、冷却水によって冷却される
というサイクルを受ける。In such continuous casting, a continuous casting roll is brought into contact with a hot slab, and after the contact is cooled by cooling water.
また、−殻内に、鋳片の引き抜き速度は２ｍ／ｍｉｎ以
下と極めて遅いために、連続鋳造ロールは通常のロール
とは比較にならない程の苛酷な熱サイクルを受けること
になる。このなめ、このような苛酷な粂件で使用される
連続鋳造ロールでは、亀裂損傷と牽耗損傷が発生しやす
い。Furthermore, since the drawing speed of the slab into the shell is extremely slow at 2 m/min or less, continuous casting rolls are subjected to severe thermal cycles that are incomparable to ordinary rolls. Continuous casting rolls used under such severe conditions are susceptible to cracking and wear damage.
この亀裂損傷は、連続鋳造ロール使用中の曲げ負荷と表
面のヒートクラックが主な原因として考えられており、
このことから、連続鋳造ロールを構成する肉盛溶接金属
には、強度、靭性および耐ヒートクラツク性等の特性が
要求されている。This crack damage is thought to be mainly caused by the bending load and surface heat cracks during continuous casting roll use.
For this reason, properties such as strength, toughness, and heat crack resistance are required of the overlay weld metal that constitutes continuous casting rolls.
また摩耗＃４傷は、鋳片とロールとの機械的接触による
摩耗と冷却水による腐食摩耗が原因とされており、上記
したような肉盛溶接金属には、さらに硬さと耐食性をも
要求されることになる。In addition, wear #4 scratches are said to be caused by abrasion due to mechanical contact between the slab and the roll and corrosive wear due to cooling water, and the above-mentioned overlay weld metal is required to have even more hardness and corrosion resistance. That will happen.
従来より、このような要求に対応する連続鋳造ロール用
肉盛溶接金属としては、１３％Ｃｒステンレス鋼を主体
とし、これにＮ ｉ 、 Ｃｒを添加したたとえば１３
Ｃｒ−４Ｎｉ−ＩＭｏｇが広く使用されており、比較的
良好な性能を実現してもいる。Conventionally, overlay weld metals for continuous casting rolls that meet these requirements have been made mainly of 13% Cr stainless steel, to which Ni and Cr have been added, such as 13% Cr stainless steel.
Cr-4Ni-IMog is widely used and has also achieved relatively good performance.
（発明が解決しようとする課題）
しかしながら、近年、操作能率の向上や省エネルギー効
果をより一層高めるために、直送圧延等による連続鋳造
の高速化、高温化が図られてきており、連続鋳造ロール
にかかる負荷が増大してきている。(Problem to be solved by the invention) However, in recent years, in order to further improve operational efficiency and energy saving effects, efforts have been made to increase the speed and temperature of continuous casting by direct rolling, etc. This burden is increasing.
また、冷却水の水質悪化によって連続鋳造ロールの腐食
摩耗が発生し、この腐食摩耗は鋳片の品質に大きな影響
をおよぼす。In addition, deterioration in the quality of the cooling water causes corrosive wear on the continuous casting rolls, and this corrosive wear has a large effect on the quality of slabs.
従来の１３Ｃｒ−４Ｎｉ−ＩＭｏｆｆに例示されるよう
な連続鋳造ロール用肉盛溶接金属ではこれらの課題への
対応が困難となってきており、耐亀裂性、耐腐食摩耗性
の一層優れな肉盛溶接金属の開発が必要とされている。It has become difficult to meet these challenges with conventional overlay weld metals for continuous casting rolls, such as 13Cr-4Ni-IMoff, and we are looking for overlay metals with even better crack resistance and corrosion wear resistance. There is a need for the development of weld metals.
この発明は、以上の通りの事情に鑑みてなされたもので
あり、従来の連続鋳造ロール用肉盛溶接金属の問題点を
解消し、良好な耐亀裂性、耐腐食摩耗性を有する新しい
連続鋳造ロール用肉盛溶接金属を提供することを目的と
している。This invention was made in view of the above circumstances, and it solves the problems of conventional overlay weld metals for continuous casting rolls, and provides a new continuous casting that has good crack resistance and corrosion wear resistance. The purpose is to provide overlay weld metal for rolls.
（課題を解決するための手段）
この発明は、上記の課題を解決するために、組成が重量
％で、
Ｃ： ０．０６０％以下
Ｓ ｉ ： １．００％以下
Ｍ ｕ ： ０．１０〜１．５０％
Ｐ ： ０．０４５％以下
Ｓ ： ０．０３０％以下
Ｃｒ ： １４．５〜１６．５％
Ｎ ｉ ： ４．０ 〜６．０ ％Ｍｏ：０．１
〜２．５ ％
Ｆｅ：残部
および不可避的不純物からなることを特徴とする連続鋳
造ロール用肉盛溶接金属を提供する。(Means for Solving the Problems) In order to solve the above problems, the present invention has the following compositions in weight percent: C: 0.060% or less Si: 1.00% or less Mu: 0.10 to 1.50% P: 0.045% or less S: 0.030% or less Cr: 14.5-16.5% Ni: 4.0-6.0% Mo: 0.1
Provided is an overlay weld metal for continuous casting rolls characterized by comprising ~2.5% Fe: the balance and unavoidable impurities.
この発明の肉盛溶接金属の組成は、上記の通りめ範囲に
限定されるが、これは、この発明の発明者が耐亀裂性お
よびｉ！ｉｔ腐食掌粍性について鋭意検討した結果はじ
めて見出したものである。The composition of the overlay weld metal of this invention is limited to the above-mentioned range, which is determined by the inventor of this invention in terms of crack resistance and i! This was discovered for the first time as a result of intensive research into IT corrosion.
耐腐食摩耗性を改善し、良好な耐亀裂性を有する肉盛溶
接金属を得るなめには、優れた耐食性と充分な強度およ
び靭性を有することが必要であり、耐食性を改善するた
めにはＣｒ含有量を増加させることが有効である。一方
、Ｃｒを増量させる場合にはフェライト組織生成による
硬度の低下を抑止することが必要となる。このためにＮ
１を含有させることも必須となる。このＣｒとＮ１の含
有量、その他の成分との関係について得られた知見に基
づいてこの発明は完成されている。In order to improve corrosion wear resistance and obtain a build-up weld metal with good crack resistance, it is necessary to have excellent corrosion resistance and sufficient strength and toughness. It is effective to increase the content. On the other hand, when increasing the amount of Cr, it is necessary to suppress a decrease in hardness due to the formation of ferrite structure. For this reason N
1 is also essential. This invention has been completed based on the knowledge obtained regarding the relationship between the content of Cr and N1 and other components.
この発明の肉盛溶接金属においては、Ｃｒ含有量を１４
．５〜１６．５重量％、Ｎｉ含有量を４．０〜６．０重
量％の範囲としている。この範囲において得られる連続
鋳造ロール用肉盛溶接金属は優れた耐食性を有し、かつ
、その硬さが最高となる。In the overlay weld metal of this invention, the Cr content is 14
．． The Ni content is in the range of 5 to 16.5% by weight, and the Ni content is in the range of 4.0 to 6.0% by weight. The overlay weld metal for continuous casting rolls obtained within this range has excellent corrosion resistance and has the highest hardness.
また、Ｍｏは、耐食性、強度を向上させるものとして有
効であり、その含有割合の下限を９．１ｉ量％とじ、そ
の効果が飽和する２、５重量％を上限とする。Furthermore, Mo is effective in improving corrosion resistance and strength, and the lower limit of its content is set at 9.1% by weight, and the upper limit is set at 2.5% by weight at which its effects are saturated.
Ｃは、ロール表面の熱亀裂感受性の増加にともない、熱
応力割れ進行に鋭敏になりやすいため、上限を０．０６
０重量％とする。Ｓｔは、多量に混入させると靭性に好
ましくないので、上限を１．ＯＯｉ量％とする。The upper limit of C is set to 0.06 because the roll surface tends to be sensitive to thermal stress crack progression as the thermal crack sensitivity increases.
0% by weight. If St is mixed in a large amount, it is not favorable for toughness, so the upper limit is set to 1. Let it be OOi amount%.
Ｍｎは、製造上の不純物として少なくとも０．１０重量
％混入する。Ｍｎの少量の添加は靭性を向上させるが、
必要な硬度等を得るためには、１．５０重量％以下とす
る。Mn is mixed in at least 0.10% by weight as a manufacturing impurity. Addition of a small amount of Mn improves toughness, but
In order to obtain the necessary hardness, etc., the content should be 1.50% by weight or less.
ＰおよびＳは、製造上の不純物として混入するが、靭性
、耐ヒートクラツク性に好ましくないので含有割合の上
限を、各々、０．０４５重量％、および０．０３０重量
％とする。P and S are mixed in as impurities during manufacturing, but since they are unfavorable for toughness and heat crack resistance, the upper limits of their content are set at 0.045% by weight and 0.030% by weight, respectively.
（作 用）
この発明の連続鋳造ロール用肉盛溶接金属においては、
その組成を上記した通りの範囲に制御することにより、
その耐食性、強度および靭性を優れたものとし、耐亀裂
性および耐腐食摩耗性を大きく向上させることができる
一ｔた、苛酷な熱サイクル条件にも高安定性を実現する
。(Function) In the overlay weld metal for continuous casting rolls of the present invention,
By controlling its composition within the range mentioned above,
It has excellent corrosion resistance, strength, and toughness, and can greatly improve crack resistance and corrosion wear resistance, and also achieves high stability even under severe thermal cycle conditions.
（実施例）
次に実施例を示し、この発明の連続鋳造ロール用肉盛溶
接金属についてさらに詳しく説明する。(Example) Next, an example will be shown and the overlay weld metal for continuous casting rolls of the present invention will be explained in more detail.
実施例Ｉ
Ｍｏ含有量が１，５重量％の連続鋳造ロール用肉盛溶接
金属の試料について、ＣｒおよびＮ１の含有量を調整し
、この試料をボタン溶解して９５０°Ｃで空気焼入れし
た後、６００″Ｃで焼きもどして供試材を製造した。各
々の供試材について、耐食性評価のために、３％食塩水
（２５°Ｃ）中における孔食電位と、硬さ評価のために
、ビッカース硬さ（ＨＶ）を測定した。Example I For a sample of overlay weld metal for continuous casting rolls with a Mo content of 1.5% by weight, the contents of Cr and N1 were adjusted, and the sample was button melted and air quenched at 950°C. The test materials were manufactured by tempering at , 600"C. For each test material, pitting potential in 3% saline (25°C) was measured for corrosion resistance evaluation, and hardness evaluation was performed for each test material. , Vickers hardness (HV) was measured.
その結果を示したものが表１および表２である。Tables 1 and 2 show the results.
表１から明らかなようにＣｒ含有量が高くなるほど孔食
電位は高くなり、耐食性の向上が確認された。また、ビ
ッカース硬さは、Ｎｉ含有量が４．０〜６．０重量％の
時に最高となった。As is clear from Table 1, the higher the Cr content, the higher the pitting corrosion potential, and it was confirmed that the corrosion resistance was improved. Further, the Vickers hardness was highest when the Ni content was 4.0 to 6.0% by weight.
Ｃｒの含有量が１４．５〜１６．５重量％、Ｎｉの含有
量が４．０〜６，０重量％の範囲において優れた耐食性
と高い硬度を有している。従来の１３Ｃｒｆｆｉよりも
１，５倍もの耐食性を示す。It has excellent corrosion resistance and high hardness when the Cr content is 14.5 to 16.5% by weight and the Ni content is 4.0 to 6.0% by weight. It exhibits 1.5 times more corrosion resistance than conventional 13Crffi.
表１
孔食電位（Ｖ ｖｓ ５ＣＥ）
表２
ビッカース硬さ（ＨＶ）
実施例２
直径３４０ｎｏｎ連続鋳造ロール（Ｎ ｉ Ｃｒ Ｍ
ｏ強靭１［）の表層に、表３に示した組成比からなる金
属を、各々１０甫肉盛溶接しな、その後、９６０°Ｃで
空気焼入れし、６００°Ｃで焼戻しな。Table 1 Pitting corrosion potential (V vs 5CE) Table 2 Vickers hardness (HV) Example 2 Diameter 340non continuous casting roll (N i Cr M
o On the surface layer of Toughness 1 [), 10 layers of metal having the composition ratio shown in Table 3 are overlay-welded, respectively, and then air quenched at 960°C and tempered at 600°C.
各々のロールについて、引張強さおよび衝撃値を測定し
た。この結果を表３に示した。Tensile strength and impact values were measured for each roll. The results are shown in Table 3.
ＣｒおよびＮｉの含有量が、各々、１４．５〜１６．５
重量％、および４．０〜６．０重量％の範囲において、
後述する比較例と同等の引張強さを有し、かつ衝！！！
＠が、比較例の約１゜５倍という極めて靭性の向上した
連続鋳造ロール用肉盛溶接金属が得られる。The content of Cr and Ni is 14.5 to 16.5, respectively.
% by weight, and in the range of 4.0 to 6.0% by weight,
It has a tensile strength equivalent to that of the comparative example described below, and has a higher tensile strength than the comparative example described below. ! !
An overlay weld metal for continuous casting rolls with significantly improved toughness of about 1.5 times that of the comparative example can be obtained.
比教例
実施例２と同様に、直径３４０ｎｎｏ連続ｇＪ造ロール
（ＮｉＣｒＭｏ強靭鋼製）の表層に１３Ｃｒ−４Ｎｉ
ＩＭｏ鋼を１０ＩＩｗＩ肉盛溶接した。９６０°Ｃで
空気焼入れし、次いで６００℃で焼戻しな後、実施例２
と同様に、引張強さおよび衝Ｓ値を測定した。Similar to Example 2, 13Cr-4Ni was applied to the surface layer of a continuous gJ roll (made of NiCrMo tough steel) with a diameter of 340nno.
IMo steel was overlay welded with 10IIwI. After air quenching at 960°C and then tempering at 600°C, Example 2
Similarly, the tensile strength and the S value were measured.
この結果も表３に併せて示した。These results are also shown in Table 3.
実施例と同等の引張り強さを有するものの、衝撃値は極
めて低く、靭性は、はるかに劣っていた。Although it had the same tensile strength as the example, the impact value was extremely low and the toughness was far inferior.
実施例３
供試材Ｎｏ、５に示した組成の肉盛溶接金属と、従来の
１３Ｃｒｅからなる供試材Ｎ０１６の肉盛溶接金属とを
、各々、肉盛溶接した連続鋳造ロールを同−設備で同一
期間使用した後、亀裂深さと京耗量を測定した。この結
果を表４に示した。Example 3 Continuous casting rolls in which the overlay weld metal having the composition shown in sample material No. 5 and the overlay weld metal of the conventional test material No. 016 made of 13Cre were overlay welded were placed in the same equipment. After being used for the same period of time, the crack depth and amount of wear were measured. The results are shown in Table 4.
従来の肉盛金属に比べて、この発明の金属の場合には亀
裂深さは３０％、掌耗量は５０％という極めて良好な性
能を有している。Compared to conventional overlay metals, the metal of the present invention has extremely good performance, with a crack depth of 30% and a palm wear amount of 50%.
表
（発明の効果）
以上詳しく説明した通り、この発明によって、優れた耐
亀裂性を有し、しかも耐腐食摩耗性の改善された連続鋳
造ロール用肉盛溶接金属が提供される。Table (Effects of the Invention) As explained in detail above, the present invention provides an overlay weld metal for continuous casting rolls that has excellent crack resistance and improved corrosion wear resistance.
これにより、連続鋳造操業の高温化、高速化を図ること
ができ、操業能率および省エネルギー効果がより一層向
上する。This makes it possible to increase the temperature and speed of the continuous casting operation, further improving operational efficiency and energy saving effects.
Claims (1)
造ロール用肉盛溶接金属。(1) Composition as weight percent: C: 0.060% or less Si: 1.00% or less Mn: 0.10 to 1.50% P: 0.045% or less S: 0.030% or less Cr: 14. 5 to 16.5% Ni: 4.0 to 6.0% Mo: 0.1 to 2.5% Fe: An overlay weld metal for continuous casting rolls, comprising the remainder and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23058588A JPH0280195A (en) | 1988-09-14 | 1988-09-14 | Cladding by welding metal for continuous casting roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23058588A JPH0280195A (en) | 1988-09-14 | 1988-09-14 | Cladding by welding metal for continuous casting roll |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0280195A true JPH0280195A (en) | 1990-03-20 |
Family
ID=16910049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23058588A Pending JPH0280195A (en) | 1988-09-14 | 1988-09-14 | Cladding by welding metal for continuous casting roll |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0280195A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010047137A1 (en) * | 2008-10-20 | 2010-04-29 | 日鉄ハード株式会社 | Roll for use in continuous casting |
-
1988
- 1988-09-14 JP JP23058588A patent/JPH0280195A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010047137A1 (en) * | 2008-10-20 | 2010-04-29 | 日鉄ハード株式会社 | Roll for use in continuous casting |
| JP5400789B2 (en) * | 2008-10-20 | 2014-01-29 | 日鉄住金ハード株式会社 | Continuous casting roll |
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