JP4919610B2 - Sintered crusher tooth - Google Patents
Sintered crusher tooth Download PDFInfo
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- JP4919610B2 JP4919610B2 JP2005068609A JP2005068609A JP4919610B2 JP 4919610 B2 JP4919610 B2 JP 4919610B2 JP 2005068609 A JP2005068609 A JP 2005068609A JP 2005068609 A JP2005068609 A JP 2005068609A JP 4919610 B2 JP4919610 B2 JP 4919610B2
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- 238000003466 welding Methods 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 239000000956 alloy Substances 0.000 claims description 25
- 229910045601 alloy Inorganic materials 0.000 claims description 25
- 239000000843 powder Substances 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 7
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- 210000000515 tooth Anatomy 0.000 description 25
- 238000000034 method Methods 0.000 description 19
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002250 progressing effect Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- Crushing And Grinding (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
Description
本発明は、製鐵所における製銑原料である焼結鉱を製造する焼結設備のうち、焼成された焼結鉱を破砕するクラッシャー受歯に関するものである。 The present invention relates to a crusher tooth receiving device for crushing a sintered sintered ore in a sintering facility for producing sintered ore which is a raw material for ironmaking in a steelworks.
焼結鉱を破砕するクラッシャーは、図１に示すように、焼結パレット１より投入された焼結鉱塊２を受け止め、３の鬼歯と一対となる受歯４により該焼結鉱塊２を適度な粒度に破砕して、次工程に送り込む設備である。高温の焼結鉱の落下を受け、かつ破砕する受歯は、著しい摩耗環境にさらされるために、当該受歯の上部に予め耐摩耗対策を施している。
As shown in FIG. 1, the crusher for crushing the sintered ore receives the sintered ore 2 input from the sintering pallet 1, and receives the sintered ore 2 by a pair of receiving
従来は、特許文献１に詳述されるように、耐塊鉱物摩耗材料を鋳掛け法、すなわち、該耐摩耗材料を溶湯にして枠の中に注入し、枠内をアーク熱などにより加熱しながら漸次凝固させて耐摩耗層を形成する方法が採用されている。また、特許文献２には耐熱耐摩耗性小片、すなわち、超硬チップの分散効果により衝撃荷重に対する抵抗性を向上させるという鋳ぐるみろう付け法による受歯が紹介されている。
しかしながら、特許文献１に記載の鋳掛け方法では、耐摩耗性と枠との融合度合の制御が難しく、融合不十分な部位では使用中に焼結鉱塊の落下による衝撃や鬼歯回転圧力により耐摩耗層の一部が剥離、欠損することがある。一方、融合過大な部位では強度部材の枠が薄くなる事に起因する冷却水漏れが発生する事があり、安定的寿命向上が期待できない問題がある。また、特許文献２に記載の鋳ぐるみろう付け方法でも、超硬チップそのものは良好な耐摩耗性を有するが、衝撃荷重による該超硬チップの脱落、欠損により、耐摩耗層マトリックスは、さほど耐摩耗性がないために、断続的に摩耗が急激に進行するという問題がある。 However, in the casting method described in Patent Document 1, it is difficult to control the degree of fusion between the wear resistance and the frame. A part of the wear layer may be peeled off or missing. On the other hand, there is a problem that in a region where the fusion is excessive, a leakage of cooling water due to the thin frame of the strength member may occur, and a stable life improvement cannot be expected. Further, even with the cast-in-place brazing method described in Patent Document 2, the cemented carbide tip itself has good wear resistance. Due to the lack of wear, there is a problem that wear proceeds intermittently abruptly.
本発明は、著しい衝撃荷重を受ける受歯において、耐摩耗層の寿命延長を図ることを課題とすると共に、受歯の摩耗層が摩耗した場合でも現場での補修が可能としたものである。即ち、従来、一般的に実施されている鋳掛け法でなく、肉盛溶接により受歯の耐摩耗層を形成することにより現場での溶接補修が可能となり、その効果は極めて大きいものである。 An object of the present invention is to extend the life of a wear-resistant layer in a tooth receiving under a significant impact load, and to enable on-site repair even when the wear layer of the tooth receiving is worn. In other words, it is possible to perform welding repair in the field by forming the wear-resistant layer of the receiving teeth by overlay welding instead of the conventional casting method, and the effect is extremely great.
本発明は上記課題を解決するためになされたものであり、格子状に鋼製の枠を設けて、該枠内に肉盛溶接により受歯の耐摩耗層を形成した焼結クラッシャー受歯であって、受歯の耐摩耗層を少なくとも２重以上の多重成分層から形成し、該多重成分層はその肉盛溶接中にワイヤー電極とは別に、Ｃｒ、Ｍｏ，Ｎｂ、Ｖを含有する合金粉末または合金粒を溶接部溶融池に供給して形成されたものであることを特徴とするものである。 The present invention has been made in order to solve the above-mentioned problems, and is a sintered crusher tooth receiving in which a steel frame is provided in a lattice shape and a wear-resistant layer of the tooth receiving is formed in the frame by overlay welding. In addition, the wear-resistant layer of the tooth receiving is formed of at least two or more multi-component layers, and the multi-component layer contains an alloy containing Cr, Mo, Nb, V in addition to the wire electrode during the overlay welding. It is characterized by being formed by supplying powder or alloy grains to the weld zone molten pool .
更に、詳述すると本願発明は格子状のＳＳ製ボックス等の枠を設け、枠内に溶接肉盛を施すことで、通常不可能な厚みの肉盛を可能とし、従来、用いられている鋳掛け法を用いなくても、十分、肉盛溶接でも耐摩耗性に優れた焼結クラッシャー受歯が得られるとする知見により成されたものである。更に、肉盛溶接法による耐摩耗層を2重以上の多重成分層から形成することにより、焼結鉱の衝撃荷重および鬼歯回転圧力の方向に、すなわち、耐摩耗層の厚み方向に、受歯本体に近い部位では耐摩耗性と靭性を兼ね備えた成分層となして耐摩耗層の剥離、欠損を防止し、摩耗環境の激しい表面部位では高硬度で良好な耐摩耗性を有する成分層と成して、寿命延長により好ましいものである。 Further, in detail, the present invention provides a grid such as a grid-like SS box, and welds are built in the frame, so that it is possible to build up a thickness that is not normally possible. This is based on the knowledge that a sintered crusher tooth with excellent wear resistance can be obtained even by overlay welding without using a method. Furthermore, by forming the wear-resistant layer by the overlay welding method from two or more multi-component layers, in the direction of the impact load of the sintered ore and the tooth rotation pressure, that is, in the thickness direction of the wear-resistant layer. A component layer that has both wear resistance and toughness near the tooth body prevents the wear-resistant layer from peeling and breaking, and a component layer that has high hardness and good wear resistance at the surface portion where the wear environment is severe. Therefore, it is preferable for extending the life.
更に、上記の手段として、受歯本体に近い部位と表面部位で、あるいは該両部位の中間部位においても、肉盛溶接用ワイヤー電極とは別に耐摩耗合金粉末または合金粒を、該部位ごとに合金粉末の種類あるいは供給量等を変化させ、溶接部溶融池に供給して多重の成分層を形成することにより剥離、欠損のない良好な耐摩耗性を有し、寿命延長を実現ならしめた受歯を提供するものである。 Further, as the above means, the wear-resistant alloy powder or alloy particles are separately added for each part in the part close to the tooth receiving body and the surface part, or in the intermediate part between the two parts, in addition to the wire electrode for overlay welding. By changing the type or supply amount of the alloy powder and supplying it to the weld zone molten pool to form multiple component layers, it has good wear resistance without peeling and chipping, and it has realized extended life. To provide a denture.
本発明によれば、焼結クラッシャー受歯の寿命を従来の鋳掛け法に比べて大幅に延長することが可能となり、摩耗限界により取替えていたものが、飛躍的に延長できたものである。さらに、順調に摩耗が進行する過程で、従来、不可能であった現場での肉盛補修を可能としたものであり、その効果は極めて大きいものである。 According to the present invention, it is possible to greatly extend the life of the sintered crusher teeth compared to the conventional casting method, and what has been replaced by the wear limit can be greatly extended. Furthermore, in the process of progressing wear smoothly, it is possible to repair the build-up on-site, which was impossible in the past, and the effect is extremely great.
以下、本発明の実施の形態について説明する。
図２は本発明の方法による受歯肉盛部の断面図であり、５の鋼製枠の中に肉盛部６が形成される。７は冷却水用の通路である。使用するに従い、摩耗が少しづつ進行するものであるが、本発明による肉盛溶接法による耐摩耗層は格子状の鋼製枠と併用することにより通常、不可能な厚みの肉盛を可能とすることができ、長期に使用に耐えることができ、極めて、有利なものである。
Embodiments of the present invention will be described below.
FIG. 2 is a cross-sectional view of the tooth receiving overlay according to the method of the present invention, in which the overlay 6 is formed in 5 steel frames. 7 is a passage for cooling water. The wear progresses little by little as it is used, but the wear-resistant layer by the overlay welding method according to the present invention can be used for overlaying in an impossible thickness by using it in combination with a grid-like steel frame. Can withstand long-term use and is extremely advantageous.
図３は本発明による多重成分層からなる受歯の使用中の消耗しつつある肉盛部の断面図である。両角部から摩耗が進行するため、角側すなわち外側に高硬度の耐磨耗層８が形成され、剥離防止のために密着強度が必要な内側には靭性を有する耐摩耗層９を形成することにより、寿命延長を可能ならしめるものである。 FIG. 3 is a cross-sectional view of a building-up part that is being worn out during use of a tooth receiving comprising a multi-component layer according to the invention. Since wear progresses from both corners, a hard wear-resistant layer 8 is formed on the corner side, that is, outside, and a wear-resistant layer 9 having toughness is formed on the inside that requires adhesion strength to prevent peeling. This makes it possible to extend the service life.
本発明方法に使用するワイヤー電極はフラックス入りワイヤーであり、図４の如く鋼帯１０で合金粉末１１を包含して成形されるが、構造上多量の合金添加に限界がある。本発明は図５に概略を示すとおり、ワイヤー電極１２により生成される溶融池１３中に１４のシールドガスを介して、Ｃｒ、Ｍｏ，Ｎｂ、Ｖを含有する合金粉末１５を供給することにより、極めて高合金の溶接金属すなわち耐摩耗肉盛層を形成することが可能となった。１６は溶接用ノズルであって、ワイヤー電極と合金粉末または合金粒とを同時に供給するノズルである。
The wire electrode used in the method of the present invention is a flux-cored wire and is formed by including the alloy powder 11 in the
図６は受歯に本発明方法を適用した肉盛部断面図であり、肉盛施工時は、図２や図３のような使用時とは異なり９０度回転した配設状態となる。鋼製枠で形成される寸法は長さ１２０mm、幅８０mm、厚さ（高さ）５０mmであった。１７は3.0mm径のフラックス入りワイヤーのみによる肉盛であり、靭性を備えた耐摩耗層Ａであって、略々１０mm厚さにした。連続的に厚さ中間部１８においてＣｒ、Ｍｏ，Ｎｂ、Ｖを含有する合金粉末を供給し、略々１０mm厚さの硬度のある中間性能の耐摩耗層Bを形成した。１９は最も熱間硬度のある耐摩耗層Ｃであって略々３０mm厚さとして、寿命延長目的の主体を示すものである。 FIG. 6 is a cross-sectional view of the built-up portion in which the method of the present invention is applied to the tooth receiving. At the time of build-up construction, the arrangement is rotated 90 degrees unlike the use as shown in FIGS. 2 and 3. The dimensions formed by the steel frame were 120 mm in length, 80 mm in width, and 50 mm in thickness (height). 17 is a build-up with only a 3.0 mm diameter flux-cored wire, and is a wear resistant layer A having toughness, which is approximately 10 mm thick. An alloy powder containing Cr, Mo, Nb, and V was continuously supplied to the intermediate thickness portion 18 to form an intermediate performance wear resistant layer B having a hardness of approximately 10 mm. Reference numeral 19 denotes a wear-resistant layer C having the most hot hardness, which has a thickness of about 30 mm and indicates the main purpose of extending the life.
尚、本発明の大きな特徴の一つである受歯の耐摩耗層が少なくとも２重以上の多重成分層から形成されているものであるが、その形成する方法は、図５に示す溶接用ノズル１６の上部に複数のホッパー（図示せず）を設け、各々のホッパーには複数の異なる合金粉末または合金粒子を貯蔵し、種類の異なる合金粉末または合金粒子を炭酸ガス等のシールドガスと共に溶接用ノズル１６内に時間を異にして供給することにより、可能となるものである。
In addition, the wear-resistant layer of the tooth receiving, which is one of the major features of the present invention, is formed of at least two or more multi-component layers. The method for forming the wear-resistant layer is shown in FIG. A plurality of hoppers (not shown) are provided on the upper portion of 16 and each hopper stores a plurality of different alloy powders or alloy particles, and welds different types of alloy powders or alloy particles together with a shielding gas such as carbon dioxide gas. This can be achieved by supplying the
次に、上記実施例の溶接条件を述べる。ワイヤー電極径は3.0ｍｍとし、電流は400〜600Ａ、電圧は30〜35Ｖの条件で溶接をおこない、溶接金属の成分および合金粉末、給粉量については表１に示す。 Next, the welding conditions of the above embodiment will be described. The wire electrode diameter is 3.0 mm, the current is 400 to 600 A, the voltage is 30 to 35 V, and welding is performed. The components of the weld metal, the alloy powder, and the amount of powder supply are shown in Table 1.
本実施例では合金粉末を用いたが合金粒でもよい。本発明方法に用いる合金粉末または合金粒は、50μｍ未満だと、飛散するため歩留りが悪くなり、500μｍ超だとノズルで供給不良が起こるため、50〜500μｍの範囲が望ましい。
In this embodiment, alloy powder is used, but alloy particles may be used. If the alloy powder or alloy grain used in the method of the present invention is less than 50 μm, it will be scattered and the yield will be poor. If it exceeds 500 μm, supply failure will occur at the nozzle, so a range of 50 to 500 μm is desirable.
以上詳述したように、本発明によれば、焼結クラッシャー受歯の寿命を従来の略々２倍、すなわち、従来12ヶ月で摩耗限界により取替えていたものが、24ヶ月まで飛躍的に延長できたものである。さらに、順調に摩耗が進行する過程で、従来、不可能であった現場での肉盛補修を可能としたものであり、その効果は極めて大きいものである。 As described above in detail, according to the present invention, the life of the sintered crusher tooth is almost doubled, that is, the one that has been replaced by the wear limit in the previous 12 months has been dramatically extended to 24 months. It was made. Furthermore, in the process of progressing wear smoothly, it is possible to repair the build-up on-site, which was impossible in the past, and the effect is extremely great.
１ 焼結パレット １５ 合金粉末
２ 焼結鉱塊 １６ 溶接用ノズル
３ 鬼歯 １７ 肉盛金属Ａ
４ 受歯 １８ 肉盛金属Ｂ
５ 鋼製枠 １９ 肉盛金属Ｃ
６ 本発明の耐摩耗層
７ 冷却水通路
８ 高硬度耐摩耗層
９ 靭性を有する耐摩耗層
１０ 鋼帯
１１ 合金粉末
１２ ワイヤー電極
１３ 溶融池
１４ シールドガス
DESCRIPTION OF SYMBOLS 1
4 Denture 18 Overlay metal B
5 Steel frame 19 Overlay metal C
6 Wear resistant layer of the present invention 7 Cooling water passage 8 High hardness wear resistant layer 9 Wear resistant
11
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| Application Number | Priority Date | Filing Date | Title |
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| JP2005068609A JP4919610B2 (en) | 2005-03-11 | 2005-03-11 | Sintered crusher tooth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005068609A JP4919610B2 (en) | 2005-03-11 | 2005-03-11 | Sintered crusher tooth |
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| Publication Number | Publication Date |
|---|---|
| JP2006247539A JP2006247539A (en) | 2006-09-21 |
| JP4919610B2 true JP4919610B2 (en) | 2012-04-18 |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5174504U (en) * | 1974-12-09 | 1976-06-11 | ||
| JPS52103312A (en) * | 1976-02-26 | 1977-08-30 | Kawasaki Heavy Ind Ltd | Wear-resisting and impact-resisting composite material |
| JPH04371390A (en) * | 1991-06-18 | 1992-12-24 | Kurimoto Ltd | Welding method for wear resistant cladding layer and wear resistant material |
| JP3217427B2 (en) * | 1992-01-31 | 2001-10-09 | 株式会社フジコー | Lump-resistant mineral wear material |
| JP2863768B2 (en) * | 1993-06-08 | 1999-03-03 | アイエヌジ商事株式会社 | Crushing surface member used for crusher |
| JP3382730B2 (en) * | 1994-08-02 | 2003-03-04 | 株式会社小松製作所 | Method of forming wear-resistant overlay and wear-resistant composite material using the method |
| JPH11309596A (en) * | 1998-04-23 | 1999-11-09 | Kurimoto Ltd | Reproducing method of consumable member vertical roll mill |
| JP3779529B2 (en) * | 2000-06-08 | 2006-05-31 | アイエヌジ商事株式会社 | Crushing surface member used in crusher |
| JP4148390B2 (en) * | 2000-10-03 | 2008-09-10 | アイエヌジ商事株式会社 | Abrasion resistant plate |
| JP3804860B2 (en) * | 2002-07-22 | 2006-08-02 | 株式会社栗本鐵工所 | Recycling method for consumable members of vertical roll mill |
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