JPS63309393A - Roll cladded by welding for hot rolling - Google Patents
Roll cladded by welding for hot rollingInfo
- Publication number
- JPS63309393A JPS63309393A JP14429787A JP14429787A JPS63309393A JP S63309393 A JPS63309393 A JP S63309393A JP 14429787 A JP14429787 A JP 14429787A JP 14429787 A JP14429787 A JP 14429787A JP S63309393 A JPS63309393 A JP S63309393A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- layer
- powder
- welding
- barrel part
- 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 title claims abstract description 15
- 238000005098 hot rolling Methods 0.000 title claims description 5
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 25
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 6
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 5
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 5
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 abstract description 3
- 238000005253 cladding Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 239000010955 niobium Substances 0.000 description 7
- 239000011651 chromium Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910000997 High-speed steel Inorganic materials 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- INZDTEICWPZYJM-UHFFFAOYSA-N 1-(chloromethyl)-4-[4-(chloromethyl)phenyl]benzene Chemical compound C1=CC(CCl)=CC=C1C1=CC=C(CCl)C=C1 INZDTEICWPZYJM-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000009750 centrifugal casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- UNASZPQZIFZUSI-UHFFFAOYSA-N methylidyneniobium Chemical compound [Nb]#C UNASZPQZIFZUSI-UHFFFAOYSA-N 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000005496 tempering Methods 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
- B23K35/3093—Fe as the principal constituent with other elements as next major constituents
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)・
本発明は圧延使用層として硬化肉盛層を有する熱間圧延
用溶接肉盛ロールに関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a weld build-up roll for hot rolling that has a hard build-up layer as a rolling layer.
(従来の技術)
熱間圧延用ロールは、一般に耐摩耗性、耐クランク性(
靭性)があって、肌荒れやヒートクラックの発生し難い
材質が要求され、従来ロールには合金チルドロール、高
合金グレンロール、アダマイトロールなどの単体ロール
や、高クロム鋳鉄、高台金グレン、アダマイトなどを外
層とする複合ロールが使用されている。(Prior art) Hot rolling rolls generally have good wear resistance and crank resistance (
Materials that have good toughness and are resistant to rough skin and heat cracks are required, and conventional rolls include single rolls such as chilled alloy rolls, high alloy grain rolls, and Adamite rolls, as well as high chromium cast iron, high base metal grain rolls, and Adamite rolls. Composite rolls with an outer layer of
(発明が解決しようとする問題点)
上記のロール材には、熱間圧延用ロールとしての必要特
性を兼備させるべく各種の成分が配合されているが、各
必要特性を十分兼備させることは困難であり、一般に耐
摩耗性に優れるものは靭性に劣り、ヒートクランクも発
生しやすい。しかも単体の場合は高価な材料をロール全
体に使用しているのも問題である。(Problems to be Solved by the Invention) Various components are blended into the above-mentioned roll material in order to make it have all the necessary properties as a hot rolling roll, but it is difficult to make it have all the necessary properties. Generally, materials with excellent wear resistance have poor toughness and are prone to heat crank. Another problem is that when used alone, expensive materials are used for the entire roll.
一方複合ロールにおいては、使用層である外層と芯部材
はそれぞれ必要特性を強調した材質とすることができ、
しかも外層のみが通常高価な材質であるという利点があ
るが、高コストの遠心力鋳造に依らねばならぬ点がやは
り問題である。On the other hand, in composite rolls, the outer layer and core member used can be made of materials that emphasize the necessary characteristics, respectively.
Moreover, although it has the advantage that only the outer layer is usually made of an expensive material, it still has the problem of having to rely on expensive centrifugal casting.
また単体、複合のいずれにしても耐事故性の面からの靭
性確保が必要であり、従って自から組成に制約があり、
飛躍的な耐摩耗性の向上は望めなかった。In addition, whether it is a single substance or a composite, it is necessary to ensure toughness from the standpoint of accident resistance, and therefore there are inherent restrictions on the composition.
No dramatic improvement in wear resistance could be expected.
(問題点を解決するための手段)
本発明は以上の問題点を解決し、耐事故性の面から十分
な靭性を確保すると共に、耐摩耗性に優れ、しかも安価
に製造できる熱間圧延用ロールを提供する目的を以って
なされたものであり、同目的達成のために、
靭性を有する鋼材によるロール胴部の外周に、プラズマ
粉体溶接によって肉盛層が圧延使用層として形成されて
おり、該肉盛層は組成が重量百分率で、
C:1.5〜3.0%、 Si:0.1〜1.5%、M
n: 0.1〜1.0%、 Ni : 0.1〜1
.5%、Cr : 1.0〜5.0 %、 Mo:
1.0〜5.0 %、Co : 5.0〜15
.0%、 W:5.0〜15.0%、V:2.0〜5
.0 %、 Nb: 1.0〜8.0 %、及
び残部実質的にFeからなるようにしたのである。(Means for Solving the Problems) The present invention solves the above problems, ensures sufficient toughness in terms of accident resistance, has excellent wear resistance, and can be manufactured at low cost. This was done with the purpose of providing rolls, and in order to achieve the same purpose, a built-up layer was formed as a rolling layer by plasma powder welding on the outer periphery of the roll body made of tough steel material. The overlay layer has a composition in weight percentage: C: 1.5-3.0%, Si: 0.1-1.5%, M
n: 0.1-1.0%, Ni: 0.1-1
.. 5%, Cr: 1.0-5.0%, Mo:
1.0-5.0%, Co: 5.0-15
.. 0%, W: 5.0-15.0%, V: 2.0-5
.. 0%, Nb: 1.0 to 8.0%, and the balance substantially comprised of Fe.
(実施例) 以下図面を参照して実施例を説明する。(Example) Examples will be described below with reference to the drawings.
第1図、第2図はロール胴部lを母材としてその外周に
プラズマ粉体溶接により、上記特定組成の肉盛層3が形
成されている本発明実施例を示す図で、2が軸部であり
、第1図はロール胴部1と軸部2が異径の場合、第2図
はロール胴部lと軸部2が同径の場合を示す。Figures 1 and 2 are views showing an embodiment of the present invention in which a build-up layer 3 having the above-mentioned specific composition is formed on the outer periphery of the roll body l as a base material by plasma powder welding, and 2 is a shaft. 1 shows a case where the roll body 1 and the shaft 2 have different diameters, and FIG. 2 shows a case where the roll body 1 and the shaft 2 have the same diameter.
第3図〜第5図は肉盛層3がロール胴部1に固着された
スリーブ1aを介して該ロール胴部l外周に形成されて
いるロール例である。すなわち肉盛層3はスリーブ1a
を母材として溶接肉盛されている。3 to 5 show roll examples in which a built-up layer 3 is formed on the outer periphery of the roll body 1 via a sleeve 1a fixed to the roll body 1. In other words, the overlay layer 3 is the sleeve 1a.
is used as the base material and is overlaid by welding.
以上のロール胴部1及び一体として造られる軸部2は靭
性を有する鋼材、たとえば鍛造材のSCM440材のよ
うな安価な鋼材の使用が可能であり、また鋳鋼によるこ
ともでき、スリーブ1aにも通常の安価な鋼管の使用が
可能である。そしてスリーブ1aの固着には一般に焼嵌
めが用いられるが、鍛造によることも可能であり、ロー
ル本体が鋳造により形成される場合は、鋳造時に一体化
を図ることもできる。For the roll body 1 and the shaft portion 2 which are integrally made, it is possible to use a steel material having toughness, for example, an inexpensive steel material such as forged SCM440 material, or cast steel. It is possible to use ordinary inexpensive steel pipes. Shrink fitting is generally used to secure the sleeve 1a, but forging is also possible, and if the roll body is formed by casting, it is also possible to integrate them at the time of casting.
なお焼嵌めの場合は肉盛溶接したスリーブを焼嵌める。In the case of shrink-fitting, a sleeve that has been overlaid and welded is shrink-fitted.
第3図はロール胴部1の全長に亘り、肉盛層3を備えた
スリーブ1aが固着されている実施例、第4図は肉盛層
3を備えたスリーブ1aが分割型であり、各分割型スリ
ーブlaが相接して胴部1に固着されている実施例、第
5図は分割型スリーブ1aがロール胴部に間隔を置いて
固着されている実施例を示す。FIG. 3 shows an embodiment in which a sleeve 1a provided with a built-up layer 3 is fixed over the entire length of the roll body 1, and FIG. FIG. 5 shows an embodiment in which the split sleeves la are fixed to the roll body 1 in abutting relation to each other, and FIG. 5 shows an embodiment in which the split sleeves 1a are fixed to the roll body at intervals.
なお図には分割型スリーブ1aが3個の場合を示してい
るが、3個に限られるべきでないことは云うまでもない
。Although the figure shows a case where there are three split sleeves 1a, it goes without saying that the number should not be limited to three.
第6図はプラズマ肉盛溶接の概要説明図で、同図におい
て4は溶接トーチであり、電極5と内筒6との間にプラ
ズマガス流路7が、内筒6と中間筒8との間に粉体供給
路9が、中間筒8と外筒10との間にシールドガス流路
1)が設けられている。FIG. 6 is a schematic explanatory diagram of plasma overlay welding. In the figure, 4 is a welding torch, a plasma gas flow path 7 is provided between the electrode 5 and the inner cylinder 6, and a plasma gas flow path 7 is provided between the inner cylinder 6 and the intermediate cylinder 8. A powder supply path 9 is provided between the intermediate cylinder 8 and the outer cylinder 10, and a shield gas flow path 1) is provided between the intermediate cylinder 8 and the outer cylinder 10.
母材のロール胴部1は電極5に対してプラスの電圧が印
加され、母材の胴部1の表面と電極5との間にプラズマ
アークを発生させると共に、この中に肉盛用粉末を粉体
供給路9より供給して溶融し、前記胴部1の表面に急冷
凝固させて肉盛層3を形成する。A positive voltage is applied to the electrode 5 of the roll body 1 of the base material, and a plasma arc is generated between the surface of the base material body 1 and the electrode 5, and the overlay powder is injected into this arc. It is supplied from the powder supply path 9 and melted, and is rapidly solidified to form the build-up layer 3 on the surface of the body 1.
ところで上記の本発明における肉盛層は、高炭素ハイス
系材質に特殊元素のNbを含有させることによって組織
を微細化させると共に、高温における結晶粒の粗大化を
防ぎ、耐摩耗性及び靭性の他、仕上ロールに必要な耐肌
荒性にも優れるようにしたもので、従来の溶製による高
速度鋼では、多量に含有させることが困難であったNb
を、プラズマ粉体溶接による肉盛によって、多量含有を
可能としたものであり、次にその成分の限定理由につい
て述べる。By the way, the build-up layer in the present invention has a fine structure by containing the special element Nb in a high-carbon high-speed steel material, prevents coarsening of crystal grains at high temperatures, and improves wear resistance and toughness. It also has excellent surface roughness resistance, which is necessary for finishing rolls, and contains Nb, which is difficult to contain in large amounts in conventional ingot-produced high-speed steel.
It is possible to contain a large amount of this material by overlaying by plasma powder welding.Next, the reasons for limiting the components will be described.
C:1.5〜3.0%
Cは炭化物生成元素であるが、1.5%未満では炭化物
の量が少なく耐摩耗性が不足し、一方3.0%を越える
と生成炭化物が粗大化し、耐熱衝撃性が劣化する。C: 1.5-3.0% C is a carbide-forming element, but if it is less than 1.5%, the amount of carbide is small and wear resistance is insufficient, while if it exceeds 3.0%, the carbide formed becomes coarse. , thermal shock resistance deteriorates.
Si:0.1〜1.5%
Siは脱酸剤として有効であるが、量を多くすると基地
を脆(するもので、0.1%未満では脱酸効果が不足し
、1.5%以上は必要とする靭性を保持できない。Si: 0.1 to 1.5% Si is effective as a deoxidizing agent, but increasing the amount makes the base brittle, so if it is less than 0.1%, the deoxidizing effect is insufficient; If this is the case, the required toughness cannot be maintained.
Mn : 0.1〜1.0%
MnはSと結合してSの害を失わせるが、0.1%未満
ではその効果は少なく、一方0.1%を越えると材質の
強靭性を劣化する。Mn: 0.1-1.0% Mn combines with S and eliminates the harmful effects of S, but if it is less than 0.1%, the effect is small, while if it exceeds 0.1%, it deteriorates the toughness of the material. do.
Ni : 0.1”1.5%
Niは基地硬度を高めるが反面組織の高温安定性を減じ
る。従って良好な硬度及び高温安定性を付与する範囲と
して0.1〜1.5%とした。Ni: 0.1"1.5% Ni increases the base hardness, but on the other hand reduces the high-temperature stability of the structure. Therefore, the range of 0.1 to 1.5% is set to provide good hardness and high-temperature stability.
Cr : 1.0〜5.0%
Crはカーバイドの安定と共に、基地の耐摩耗性を向上
するが、1%未満ではその効果は少な(、一方5%を越
えると脆弱な共晶炭化物を晶出し靭性を低下する。Cr: 1.0-5.0% Cr stabilizes the carbide and improves the wear resistance of the base, but if it is less than 1%, the effect is small (on the other hand, if it exceeds 5%, it will crystallize the brittle eutectic carbide. Decreases ejection toughness.
Mo: 1.0〜5.0%
Moは基地硬度を高めるが、1.0%未満ではその効果
は十分でなく、また5%を越えても相応の効果はない、
ゆえに経済的な面から1.0〜5.0%とした。Mo: 1.0-5.0% Mo increases base hardness, but if it is less than 1.0%, the effect is not sufficient, and if it exceeds 5%, there is no corresponding effect.
Therefore, from an economical point of view, the content was set at 1.0 to 5.0%.
Go : 5.0〜15.0%
Coは大部分基地に固溶し、耐熱性を向上させるが、5
%未満ではその効果は少なり、15%を越えると靭性が
劣化する。Go: 5.0 to 15.0% Co is mostly dissolved in the base and improves heat resistance, but
If it is less than 15%, the effect will be small, and if it exceeds 15%, the toughness will deteriorate.
W:5.Q〜15.0%
WはCと化合してダンゲステン炭化物を形成し耐摩耗性
に寄与するが、熱伝導度が低いので多量に含有すると熱
歪による耐クランク性が劣化する。W:5. Q~15.0% W combines with C to form dungesten carbide and contributes to wear resistance, but since it has low thermal conductivity, if it is contained in a large amount, crank resistance due to thermal distortion will deteriorate.
従って良好な耐摩耗性と共に耐クランク性を備える範囲
として5.0〜15.0%と限定した。Therefore, the content is limited to 5.0 to 15.0% as a range that provides good wear resistance and crank resistance.
V:2.0〜5.0 % VはCと化合してバナジウム炭化物を形成する。V: 2.0-5.0% V combines with C to form vanadium carbide.
バナジウム炭化物は硬度が高く、また球状に析出し靭性
も良好にするもので、他の炭化物生成元素とのバランス
から2.0〜5.0%と限定した。Vanadium carbide has high hardness, and also precipitates in a spherical shape to provide good toughness, so it is limited to 2.0 to 5.0% in consideration of the balance with other carbide-forming elements.
Nb: 1.0〜8.0% Nbは炭素と化合してニオブ炭化物を形成する。Nb: 1.0-8.0% Nb combines with carbon to form niobium carbide.
一方既述のように組織を微細化させると共に高温におけ
る結晶粒の粗大化を防ぎ、耐摩耗性、靭性及び耐肌荒性
を良好にする。しかし1.0%未満ではその効果はなく
、8.0%を越えると焼入性が低下する。On the other hand, as mentioned above, it refines the structure and prevents coarsening of crystal grains at high temperatures, improving wear resistance, toughness, and roughness resistance. However, if it is less than 1.0%, there is no effect, and if it exceeds 8.0%, the hardenability decreases.
なお残部は実質的にFeである。Note that the remainder is substantially Fe.
以上の組成の肉盛層形成用の原料粉末は、後述の具体的
実施例において示すように、高炭素ハイス系材粉末とN
bC粉末の混合粉末を用いるが、必ずしもこのような組
合せと限られるものではなく、総合的に上記特定組成に
入るような他の粉末の組合せによるこも可能である。The raw material powder for forming a built-up layer having the above composition is composed of high carbon high speed steel material powder and N
Although a mixed powder of bC powder is used, the combination is not necessarily limited to this, and it is also possible to use a combination of other powders that collectively fall within the above-mentioned specific composition.
次に本発明の具体的実施例を示す。Next, specific examples of the present invention will be shown.
a)ロールサイズ φ350 X5001 (n)
b)ロール材(母材) SCM440
C)肉盛層 5fl
d)使用粉末 Fe系合金粉末とNbC粉末との
混合粉末
1)Fe系合金粉末・・・粒度 60〜250メツシユ
、配合量 90w t%
組成(賀t%)
C:1.45%、Si : 0.37%、Mn : 0
.40%、Ni : 0.72%、Cr : 4.50
%、Mo : 2.72%、Co : 10.5 %
、W : 1).2%、V : 3.21%、残部実質
的にFe。a) Roll size φ350 X5001 (n)
b) Roll material (base material) SCM440 C) Overlay layer 5fl d) Powder used Mixed powder of Fe-based alloy powder and NbC powder 1) Fe-based alloy powder...Particle size 60-250 mesh, blending amount 90w t% Composition (T%) C: 1.45%, Si: 0.37%, Mn: 0
.. 40%, Ni: 0.72%, Cr: 4.50
%, Mo: 2.72%, Co: 10.5%
, W: 1). 2%, V: 3.21%, remainder substantially Fe.
1i)NbC粉末・・・粒度 60〜250メツシユ、
配合量 10−t%
e)肉盛条件 予熱温度 400℃
電 流 145A
電 圧 33 V
f)肉盛層組成(wt%) (分析値)C:2.32%
、 Si:0.35%、Mn : 0.35%、Ni:
0.60%、 Cr : 4.30%、Mo : 2
.52%、Co: 9.8 %、 W : 10.
5 %、V : 3.07%、Nb: 5.04%、
残部実質的にFe。1i) NbC powder...particle size 60-250 mesh,
Compounding amount 10-t% e) Overlay conditions Preheating temperature 400°C Current 145 A Voltage 33 V f) Overlay layer composition (wt%) (Analytical value) C: 2.32%
, Si: 0.35%, Mn: 0.35%, Ni:
0.60%, Cr: 4.30%, Mo: 2
.. 52%, Co: 9.8%, W: 10.
5%, V: 3.07%, Nb: 5.04%,
The remainder is essentially Fe.
g)熱処理 溶接肉盛後、焼戻を540℃で3回゛以上
のようにして得た実施例ロールの肉盛層の金属顕微鏡組
織写真(x 400)を第7図として示す。g) Heat treatment FIG. 7 shows a metallographic micrograph (x 400) of the build-up layer of the example roll obtained by tempering at 540° C. three times or more after weld build-up.
また第8図は、上記肉盛層の高温硬さを示すグラフ図で
あり、室温でHv 880.600℃においてHv61
0のような優れた値を示す。FIG. 8 is a graph showing the high-temperature hardness of the build-up layer, with Hv 880 at room temperature and Hv 61 at 600°C.
It shows an excellent value like 0.
第9図は上記肉盛層表面から各深さにおける硬さのグラ
フ図であり、表面から5■會までの肉盛部分はH武C6
3〜66の優れた硬さを示している。Figure 9 is a graph of the hardness at each depth from the surface of the built-up layer, and the built-up area from the surface to 5mm is H B C6.
It shows excellent hardness of 3-66.
(発明の効果)
本発明は以上のように、靭性を有する鋼材によるロール
胴部外周に、プラズマ粉体溶接によって高炭素ハイス系
材質にNbを含有させた組成の肉盛層を形成させている
ので、従来の鋳造ロールはもとより肉盛ロールに比して
耐摩耗性、強靭性及び耐肌荒性に優れると共に、ロール
胴部に通常の安価な鋼材、またスリーブも同様に安価な
鋼管を使用することが可能で、経済的にも優れたもので
あり、本発明の工業的価値は著大である。(Effects of the Invention) As described above, the present invention forms a built-up layer of a composition of high carbon high speed steel containing Nb on the outer periphery of the roll body made of tough steel material by plasma powder welding. Therefore, it has superior wear resistance, toughness, and roughness resistance compared to conventional casting rolls as well as build-up rolls, and uses ordinary inexpensive steel materials for the roll body and inexpensive steel pipes for the sleeve as well. It is possible to do so and is economically superior, and the industrial value of the present invention is significant.
第1図〜第5図は本発明実施例ロールの要部断面図であ
る。第1図、第2図はロール胴部を母材としたプラズマ
粉体溶接による肉盛層を備えたロール例で、第1図はロ
ール胴部と軸部が異径の場合、第2図はロール胴部と軸
部が同径の場合である。
第3図〜第5図はロール胴部に固着したスリーブを母材
としたプラズマ粉体溶接による肉盛層を備えたロール例
を示す。
第6図はプラズマ粉体溶接の概要説明図、第7図は実施
例の肉盛層の金属顕微鏡組織写真(×400)である。
第8図は実施例ロールの肉盛層表面硬度の温度特性を示
すグラフ図、第9図は実施例ロールの肉盛層表面からの
距離と硬度との関係を示すグラフ図である。
1・・・ロール胴部、1a・・・スリーブ、2・・・軸
部、3・・・肉盛層、4・・・プラズマ粉体溶接トーチ
、5・・・電極、6・・・内筒、7・・・プラズマガス
流路、8・・・中間筒、9・・・粉体供給路、10・・
・外筒、1)・・・シールドガス流路。1 to 5 are sectional views of essential parts of a roll according to an embodiment of the present invention. Figures 1 and 2 show examples of rolls with a build-up layer formed by plasma powder welding using the roll body as a base material. is the case where the roll body and the shaft have the same diameter. 3 to 5 show examples of rolls having a built-up layer formed by plasma powder welding using a sleeve fixed to the roll body as a base material. FIG. 6 is a schematic explanatory diagram of plasma powder welding, and FIG. 7 is a metal microscopic photograph (×400) of the build-up layer of the example. FIG. 8 is a graph showing the temperature characteristics of the surface hardness of the build-up layer of the example roll, and FIG. 9 is a graph showing the relationship between the distance from the build-up layer surface and the hardness of the example roll. DESCRIPTION OF SYMBOLS 1... Roll body part, 1a... Sleeve, 2... Shaft part, 3... Overlay layer, 4... Plasma powder welding torch, 5... Electrode, 6... Inside Cylinder, 7... Plasma gas flow path, 8... Intermediate cylinder, 9... Powder supply path, 10...
・Outer cylinder, 1)...shielding gas flow path.
Claims (2)
ラズマ粉体溶接によって肉盛層が圧延使用層として形成
されており、該肉盛層は組成が重量百分率で、 C:1.5〜3.0%、Si:0.1〜1.5%、Mn
:0.1〜1.0%、Ni:0.1〜1.5%、Cr:
1.0〜5.0%、Mo:1.0〜5.0%、Co:5
.0〜15.0%、W:5.0〜15.0%、V:2.
0〜5.0%、Nb:1.0〜8.0%、及び残部実質
的にFeからなることを特徴とする熱間圧延用溶接肉盛
ロール。(1) A build-up layer is formed as a rolling layer on the outer periphery of a roll body made of tough steel material by plasma powder welding, and the build-up layer has a composition in weight percentage, C: 1.5 ~ 3.0%, Si: 0.1-1.5%, Mn
:0.1~1.0%, Ni:0.1~1.5%, Cr:
1.0-5.0%, Mo: 1.0-5.0%, Co: 5
.. 0-15.0%, W: 5.0-15.0%, V: 2.
0 to 5.0%, Nb: 1.0 to 8.0%, and the balance substantially consisting of Fe.
て該ロール胴部外周に形成されていることを特徴とする
特許請求の範囲第1項に記載の熱間圧延用溶接肉盛ロー
ル。(2) Weld overlay for hot rolling according to claim 1, characterized in that the overlay layer is formed on the outer periphery of the roll body via a sleeve fixed to the roll body. roll.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14429787A JPS63309393A (en) | 1987-06-10 | 1987-06-10 | Roll cladded by welding for hot rolling |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14429787A JPS63309393A (en) | 1987-06-10 | 1987-06-10 | Roll cladded by welding for hot rolling |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63309393A true JPS63309393A (en) | 1988-12-16 |
Family
ID=15358793
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14429787A Pending JPS63309393A (en) | 1987-06-10 | 1987-06-10 | Roll cladded by welding for hot rolling |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63309393A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0288745A (en) * | 1988-09-27 | 1990-03-28 | Nippon Steel Corp | Wear-resistant cast iron roll material |
JPH0381091A (en) * | 1989-08-24 | 1991-04-05 | Kubota Corp | Weld build-up roll for hot rolling |
WO1994022606A1 (en) * | 1993-03-31 | 1994-10-13 | Hitachi Metals, Ltd. | Wear- and seizure-resistant roll for hot rolling |
JP2004183085A (en) * | 2002-12-06 | 2004-07-02 | Hitachi Metals Ltd | Roll for rolling |
CN105290643A (en) * | 2015-10-22 | 2016-02-03 | 镇江市华盈轧辊有限公司 | Flux-cored wire containing Y2O3 for build-up welding and remanufacturing of large supporting roller |
CN105290644A (en) * | 2015-10-22 | 2016-02-03 | 镇江市华盈轧辊有限公司 | Flux-cored wire for remanufacturing cold hardening resisting supporting roll through bead welding |
-
1987
- 1987-06-10 JP JP14429787A patent/JPS63309393A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0288745A (en) * | 1988-09-27 | 1990-03-28 | Nippon Steel Corp | Wear-resistant cast iron roll material |
JPH0534413B2 (en) * | 1988-09-27 | 1993-05-24 | Nippon Steel Corp | |
JPH0381091A (en) * | 1989-08-24 | 1991-04-05 | Kubota Corp | Weld build-up roll for hot rolling |
WO1994022606A1 (en) * | 1993-03-31 | 1994-10-13 | Hitachi Metals, Ltd. | Wear- and seizure-resistant roll for hot rolling |
US5514065A (en) * | 1993-03-31 | 1996-05-07 | Hitachi Metals, Ltd. | Wear- and seizing-resistant roll for hot rolling and method of making the roll |
JP2004183085A (en) * | 2002-12-06 | 2004-07-02 | Hitachi Metals Ltd | Roll for rolling |
CN105290643A (en) * | 2015-10-22 | 2016-02-03 | 镇江市华盈轧辊有限公司 | Flux-cored wire containing Y2O3 for build-up welding and remanufacturing of large supporting roller |
CN105290644A (en) * | 2015-10-22 | 2016-02-03 | 镇江市华盈轧辊有限公司 | Flux-cored wire for remanufacturing cold hardening resisting supporting roll through bead welding |
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