JP3365481B2 - Large wear-resistant member made of high Mn cast steel - Google Patents

Large wear-resistant member made of high Mn cast steel

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Publication number
JP3365481B2
JP3365481B2 JP27509397A JP27509397A JP3365481B2 JP 3365481 B2 JP3365481 B2 JP 3365481B2 JP 27509397 A JP27509397 A JP 27509397A JP 27509397 A JP27509397 A JP 27509397A JP 3365481 B2 JP3365481 B2 JP 3365481B2
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JP
Japan
Prior art keywords
wear
cast steel
resistant
thickness
fitting
Prior art date
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JP27509397A
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Japanese (ja)
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JPH1190251A (en
Inventor
真司 寺岡
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株式会社栗本鐵工所
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Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は代表的な耐摩耗部材
の一つである高Mn鋳鋼の製造技術の改善に係る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a manufacturing technique for high Mn cast steel, which is one of typical wear resistant members.

【0002】[0002]

【従来の技術】高Mn鋳鋼の歴史は古くハッドフィール
ド鋼とも呼ばれ、基本的にはC:1.0〜1.3%,M
n:12%(重量%、以下同じ)を成分ベースとし、M
o,Crなどの他の成分を数%含んで特定の性質を強化
する場合もあるが、鋳放しでA1変態を起こすことなく
ほぼオーステナイト相のままで常温に達することが最大
の特徴である。しかし、鋳放しの状態ではオーステナイ
ト粒界に多くの炭化物(Fe,Mn)3Cが生じている
からこのままでは脆くて使用できない。そのため127
0〜1370°K(1000〜1100℃)に一旦加熱
し、オーステナイト内に炭素を十分固溶させた後、水中
に焼き入れる、いわゆる水靱処理を行なう。これによっ
てオーステナイト単一組織となり、高Mn鋳鋼特有の靱
性と優れた加工硬化性能が得られる。
2. Description of the Related Art The history of high Mn cast steel is also called as hadfield steel, and basically, C: 1.0 to 1.3%, M
n: 12% (% by weight, the same applies hereinafter) as a component base, M
In some cases, other components such as o and Cr may be included in a few% to strengthen specific properties, but the most characteristic feature is that it reaches the normal temperature in the austenite phase in the as-cast state without causing A1 transformation. However, in the as-cast state, a large amount of carbide (Fe, Mn) 3 C is generated in the austenite grain boundaries, and as it is, it cannot be used because it is brittle. Therefore 127
A so-called water toughening treatment is performed in which the material is once heated to 0 to 1370 ° K (1000 to 1100 ° C) to sufficiently dissolve carbon in austenite and then quenched in water. As a result, a single structure of austenite is obtained, and the toughness peculiar to high Mn cast steel and excellent work hardening performance are obtained.

【0003】水靱処理を十分に施した高Mn鋳鋼は、最
大の利点として製品表面を擦過(アブレッシーブ)する
ことによってオーステナイト結晶格子に歪みが生じて強
力な加工硬化作用が発現し、容易に摩耗することなくそ
の部分が摩耗によって退入すれば、次ぎに表面として現
われた新たな露出部分に同様な加工硬化が繰り返し起こ
り、深部に至るまで常にアブレッシーブな摩耗に対抗し
て、高耐摩耗部材として理想的な経過を辿る材質として
高い評価が定着している。
A high Mn cast steel that has been subjected to sufficient water toughness treatment has the greatest advantage of causing a strain on the austenite crystal lattice by abrading the surface of the product and exerting a strong work hardening effect, and easily abrading. If that portion retreats due to wear without doing so, the same work hardening occurs repeatedly on the newly exposed portion that appears next as the surface, and as a highly wear resistant member, it constantly resists abrasive wear to the deep part. The material has a high reputation as an ideal material.

【0004】この特性を活かし比較的低いコストで優れ
た耐摩耗部材として古くから多岐に亘って重用され、ロ
ール間に被砕物を噛み込んで破砕するロールタイプとし
てロール、タイヤ、テーブルライナー、また旋動破砕機
としてマントル、バウルライナー、コーンケーブリング
など、衝撃式破砕機のハンマー、反撥板や、ジョウクラ
ッシャーの動歯、不動歯、さらには大型カーシュレッダ
ーのグレートバーなど広い範囲の各現場において盛んに
使用されている。
Taking advantage of this characteristic, it has been used for a long time in a wide variety of ways as an excellent wear resistant member at a relatively low cost, and as a roll type that crushes by catching a crushed object between rolls, a roll, a tire, a table liner, or a rolling type. As a dynamic crusher such as mantle, bawl liner, cone cabling, impact type crusher hammer, repulsion plate, jaw crusher moving teeth, immovable teeth, large car shredder great bar, etc. Is used for.

【0005】高Mn鋳鋼は前述のように鋳放しまでオー
ステナイト組織を維持するが、粒界に析出した炭化物を
固溶するためにオーステナイト領域の高温まで加熱し、
その後、全体が同一の高温度となるように肉厚に基ずい
て保持時間を決め、水中へ投入しこの水靱作用によって
炭化物の析出を分解して高靱性、高耐摩耗性の材質に改
質する。この場合、高Mn鋳鋼の熱膨張係数は表1のよ
うに各温度において他の合金鋼に比べて遥かに大きい
が、表2のように各温度における熱伝導率は遥かに小さ
く、このことを十分に考慮した上で水靱処理を施さなけ
れば割れなどの不良発生の原因となり、特に製品が大型
化すると共に、その組織改質の困難さは飛躍的に急増す
る。
As described above, the high Mn cast steel maintains the austenite structure until it is cast, but is heated to a high temperature in the austenite region in order to form a solid solution with carbides precipitated at grain boundaries.
After that, the holding time is determined based on the wall thickness so that the whole becomes the same high temperature, and it is put into water and the precipitation of carbides is decomposed by this water toughness action to change to a material with high toughness and high wear resistance. To quality. In this case, the coefficient of thermal expansion of the high Mn cast steel is much larger than that of the other alloy steels at each temperature as shown in Table 1, but the thermal conductivity at each temperature is much smaller as shown in Table 2. If water toughness treatment is not carried out with due consideration, defects such as cracks will occur, and in particular, the product will become large and the difficulty of modifying its structure will increase dramatically.

【0006】[0006]

【表1】 [Table 1]

【表2】 [Table 2]

【0007】水靱処理のための加熱は当然、緩い昇温速
度を採り、たとえば表2に示すように高Mn鋳鋼の場
合、873K(600℃)までの比較的低温域の熱伝導
率は悪くて合金鋼の30〜70%であるため、この温度
までの昇温速度は、一般に50〜80K/hのゆっくり
した速度を適用することが望ましく、973K(700
℃)以上になれば、100〜150K/hの昇温速度を
適用しても差し支えはない。
The heating for the water toughness treatment naturally takes a gradual temperature rising rate. For example, as shown in Table 2, in the case of high Mn cast steel, the thermal conductivity in a relatively low temperature range up to 873K (600 ° C) is poor. Since it is 30 to 70% of the alloy steel, it is generally desirable to apply a slow rate of 50 to 80 K / h to this temperature.
(° C) or higher, a heating rate of 100 to 150 K / h can be applied.

【0008】[0008]

【発明が解決しようとする課題】高Mn鋳鋼の水靱で特
に課題となり、これが製品サイズの限界として制約を課
す段階は本質的に冷却の能力に係る。すなわち高Mn鋳
鋼は保持温度の低下と共にAcm線に沿ってオーステナ
イト相の中への炭素の固溶限が下がってくるため、出炉
後、水中に浸漬するまでの時間が長くなり鋳鋼品の温度
が下がってくると、炭素量の多い鋼種では粒界に炭化物
が析出して水靱処理後の靱性が劣化せざるを得ない。図
18に13%Mn鋼の炭素の固溶限を示すが、これによ
り900℃ではオーステナイト中への炭素固溶限が1.
0%まで下がっていることがわかる。高Mn鋳鋼の場合
炭化物の析出ノーズ温度は580〜730℃であり、1
〜2分で析出を開始する。
The water toughness of high Mn cast steels presents a particular challenge, which imposes a constraint as a product size limit, essentially on the cooling capacity. That is, in the case of high Mn cast steel, the solid solution limit of carbon in the austenite phase decreases along the Acm line as the holding temperature decreases. When the temperature decreases, carbides are precipitated at grain boundaries in steel types having a large amount of carbon, and the toughness after water toughening treatment is inevitably deteriorated. FIG. 18 shows the solid solubility limit of carbon of 13% Mn steel. As a result, at 900 ° C., the solid solubility limit of carbon in austenite is 1.
It can be seen that it has fallen to 0%. In the case of high Mn cast steel, the precipitation nose temperature of carbide is 580 to 730 ° C.
Start the precipitation in ~ 2 minutes.

【0009】このため肉厚の大きい鋳鋼品の場合は鋳物
内部までオーステナイト単一相にすることは難しく、1
00mm以上の肉厚の高Mn鋳鋼では理想的な水靱処理
を行なったとしても、内部には結晶粒界に多くの炭化物
が生成し、高Mn鋳鋼の引張り強さや靱性を劣化させて
使用中に割れや破断の原因となる。
Therefore, in the case of a cast steel product having a large wall thickness, it is difficult to form an austenite single phase even inside the cast product.
Even if an ideal water toughness treatment is performed on a high Mn cast steel with a wall thickness of 00 mm or more, a large amount of carbide is generated inside the grain boundaries, which deteriorates the tensile strength and toughness of the high Mn cast steel and is in use. It causes cracks and fractures.

【0010】米国における耐熱性材の資料(STEEL
FOUNDERS’SOCIETY OF AMER
ICA刊行STEEL CASTING HANDBO
OK、頁16−11〜16−15)によれば、表3に示
す標準成分、Cr配合、Mo配合、同特許合金(lea
n alloy),高抗圧高張材(特許合金)、可削材
(特許合金)について、肉厚を1インチ(25mm)と
6インチ(150mm)の両試験片を採取して両者の差
を図19(引張りテストにおける伸び%)、図20(ア
イゾット衝撃値ft−lb),あるいは図21(実用引
張り強度ksiまたはMpa)、図22(抗圧力ksi
またはMpa)によって比較している。
Materials for heat resistant materials in the United States (STEEL
FOUNDERS 'SOCIETY OF AMER
ICA publication STEEL CASTING HANDBO
According to OK, pp. 16-11 to 16-15), standard components shown in Table 3, Cr blending, Mo blending, and the same alloy (lea)
n alloy), high coercive tension material (patented alloy), and machinable material (patented alloy), both test pieces with a wall thickness of 1 inch (25 mm) and 6 inch (150 mm) were sampled and the difference between them was plotted. 19 (elongation% in tensile test), FIG. 20 (Izod impact value ft-lb), or FIG. 21 (practical tensile strength ksi or Mpa), FIG. 22 (coercive pressure ksi).
Or Mpa).

【0011】[0011]

【表3】 [Table 3]

【0012】結果からも明らかなように、抗圧力を除い
て肉厚による各物性値の落ち込みは甚だしく、このテス
トから見ても前記の定説として成立している製品肉厚が
100mmが限界であることを示唆している。
As is clear from the results, the physical property values drop drastically due to the wall thickness except for the coercive pressure, and even from this test, the product wall thickness established by the above-mentioned dogma is 100 mm. Suggests that.

【0013】このように高Mn鋳鋼のオーステナイト自
体の特性と水靱作用の及ぶ冷却能力の限界から、100
mm以上の肉厚製品は健全で均一な内部組織が得難く、
前記の各分野における使用が粉砕実効率の向上を求めて
耐用期間の延長を要請し、肉厚を増加して有効摩耗消費
量の実質的な増加を求めても、肉厚上の限界からこの要
望には対応し難く、この技術分野における大きな課題と
して立ち塞がっている。
As described above, from the characteristics of the austenite itself of the high Mn cast steel and the limit of the cooling capacity which exerts the water toughness effect, 100
It is difficult to obtain a sound and uniform internal structure for thick products of mm or more,
Even if the use in each of the above fields demands an extension of the useful life in order to improve the actual efficiency of crushing, and the wall thickness is increased to obtain a substantial increase in the effective wear consumption, this is due to the limit of the wall thickness. It is difficult to meet the demand, and it is blocked as a major problem in this technical field.

【0014】一方、母材金属に異種のより高度な耐摩耗
部材を嵌合した複合材料として耐用期間の延長を図る方
式も従来から多く試みられ実施に供されている。たとえ
ば、特開昭62−244449号公報による従来技術で
は、高炉スラグ、クリンカ、石炭粉砕用のローラ、セグ
メントを対象に限定し、金属の基地にセラミックス製の
ピンを多数粉砕面に埋設したことにより耐摩耗性の強化
を図っている。ピンの埋設は粉砕面に所定の深さまで孔
を明け、ピンを埋設してエポキシ系樹脂の接着剤で固定
したものである。
On the other hand, there have been many attempts and implementations of a method of extending the service life as a composite material in which different kinds of higher wear resistant members are fitted to the base metal. For example, in the prior art disclosed in Japanese Laid-Open Patent Publication No. 62-244449, blast furnace slag, clinker, rollers for crushing coal, and segments are limited, and a large number of ceramic pins are embedded in the crushing surface of a metal matrix. The wear resistance is strengthened. The embedding of the pin is performed by forming a hole in the crushed surface to a predetermined depth, embedding the pin and fixing it with an epoxy resin adhesive.

【0015】特開平7−51585号公報に係る従来技
術ではミルローラ、コーンクラッシャー型の粉砕機に限
定し、図23に例示するように表層が耐摩耗性の低い母
材金属101、多数の凹部が規則的に形成され、各凹部
にキャスティングにより深さ方向に連続形成された高耐
摩耗性金属102が充填されている。しかし、この充填
とは、具体的には耐摩耗性金属を下向き自動溶接による
多層肉盛溶接によっていたため多大の時間を必要とした
課題を、エレクトロガスまたはノンガスの大入熱を用い
た縦向き単層肉盛溶接によってキャスティングして解決
したと謳っている。
The prior art disclosed in Japanese Patent Laid-Open No. 7-51585 is limited to a mill roller and a cone crusher type crusher. As shown in FIG. 23, the surface layer is a base metal 101 having low wear resistance, and a large number of recesses are formed. Highly wear-resistant metal 102, which is regularly formed and continuously formed in the depth direction by casting, is filled in each recess. However, this filling is a problem that requires a lot of time because it was a multilayer overlay welding by downward automatic welding of wear-resistant metal, and the vertical orientation using large heat input of electrogas or non-gas It is said that it was solved by casting by single layer overlay welding.

【0016】実公昭56−31322号公報による従来
技術では、ジョークラッシャーの歯板の耐摩耗性の向上
を目指し、歯の頂部を波形歯板の山の形状に合わせて成
形するとともに、台板に埋め込まれる部分を垂直または
末広がりにした断面をほぼ蒲鉾形に成形した高硬度ブロ
ックを鋳型内にセットして母材金属を注湯し、鋳包んで
溶着させるか、または該ブロックを接着剤で接着して固
定する構成を提示している。またブロック嵌合の安定性
を求めた改良技術と見られる実公昭57−31950号
や実公昭57−13162号、特公昭57−23542
号公報などの関連技術もある。
In the prior art disclosed in Japanese Utility Model Publication No. 56-31322, in order to improve the wear resistance of the tooth plate of the jaw crusher, the tops of the teeth are formed in conformity with the shape of the crests of the corrugated tooth plate and the base plate is formed. Set a high-hardness block with a cross-section in which the embedded part is vertical or divergent into an approximately kamaboko shape and set it in the mold, pour the base metal, melt it by casting and wrapping, or bond the block with an adhesive. Then, the configuration for fixing is presented. In addition, Jikkou 57-31950, Jikkou 57-13162, and JP 57-35542 are considered to be improved technologies that require stability in block fitting.
There is also related technology such as the bulletin.

【0017】しかし、これらの従来技術はすべて耐摩耗
性の向上を目的の主体として掲げ、異種材料で成形した
ブロックを嵌合したり、またはキャスティングと呼んで
いるが、実質的には肉盛溶接によって異種金属層を規則
的に形成することに発想の原点があり、高Mn鋳鋼の水
靱処理に伴って直面する前記の固有の課題、すなわち有
効摩耗消費量の増加による耐用期間の延長、実質的には
製品サイズの限界という課題を解決するものではない。
However, in all of these conventional techniques, the main purpose is to improve wear resistance, and blocks formed by different materials are called fitting or casting. The origin of the idea is to form a dissimilar metal layer regularly by means of the above, and the above-mentioned inherent problems faced with the water toughening treatment of high Mn cast steel, namely, the extension of the service life due to the increase of the effective wear consumption, the substantial It does not solve the problem of product size limitation.

【0018】本発明はあくまで高Mn鋳鋼で製造する各
種耐摩耗部材の製品肉厚(一般的に100mmが定説)
を大幅に超え、耐摩耗面として有効に機能する容量をア
ップすることによって、全体としての耐用期間の延長を
図り、結果的に作業効率の抜本的な向上を図ることを発
想の原点に捉えたものである。
The present invention is merely the product wall thickness of various wear-resistant members manufactured from high Mn cast steel (generally 100 mm is established)
By increasing the capacity that effectively functions as a wear-resistant surface, the overall service life is extended, resulting in a drastic improvement in work efficiency. It is a thing.

【0019】[0019]

【課題を解決するための手段】本発明に係る高Mn鋳鋼
よりなる大型の耐摩耗部材は、水靭作用が発現する表面
からの最短距離が、耐摩耗部材内の摩耗面のいかなる部
分においても健全な組織として許容限度内の物性値を保
証し得る100mmを超えないように凹部を形成し、該
凹部の最大差し渡し長さが凹部と凹部との間を形成する
肉厚、または凹部底面と部材表裏面との間で形成する肉
厚の何れよりも大きく設定した広い開口面を通じて冷却
水の流動を活発に入れ替える形状で鋳造した母材1と、
該凹部11へ嵌合係止する同型の高Mn鋳鋼の嵌合材2
とを一体的に組合わせて最大肉厚が100mmを超える
ことによって前記の課題を解決した。
A large-sized wear-resistant member made of high Mn cast steel according to the present invention has a surface exhibiting a water toughening action.
The shortest distance from to keep the physical property value within the allowable limit as a healthy structure in any part of the wear surface in the wear resistant member.
Any of the wall thickness formed by forming a recess so that it does not exceed 100 mm that can be proved, and the maximum passing length of the recess forms between the recess, or between the bottom surface of the recess and the front and back surfaces of the member. Cooling through a wide open surface set larger than
Base material 1 cast in a shape that actively exchanges the flow of water ,
Fitting material 2 of the same type of high Mn cast steel that fits and locks in the recess 11
The above problems were solved by integrally combining and with the maximum wall thickness exceeding 100 mm .

【0020】このように限定された構造において、とく
に凹部を形成して水靱作用が発現する表面からの再短距
離が、健全な組織として許容限度内の物性値を保証し得
る100mmの距離以内に含まれるように形状を設定
し、とくに凹部と凹部間の母材肉厚の距離を凹部の最大
差し渡し長さ(凹部が円柱形ならば直径、角形ならば対
角線の長さ)より小さく採り、この広い開口面を通じて
冷却水の流動を活発に入れ替えるように図ったから、冷
却水が局部的に過熱、沸騰して水靱作用の製品深部への
進行を妨げる要因を排除した。この関係は凹部底面と部
材の表、裏面間で形成する肉厚に対しても同様に形状決
定上の要件としたから、同一作用が得られる。
In such a limited structure, the shortest distance from the surface where a recess is formed and water toughness is exerted is within a distance of 100 mm which can guarantee the physical property value within the allowable limit as a healthy tissue. The shape is set to be included in, and the distance of the base material wall thickness between the recesses is set to be smaller than the maximum crossover length of the recesses (diameter if the recess is cylindrical, diagonal length if the recess is prismatic), Since the flow of the cooling water was actively exchanged through this wide opening surface, the factors that locally overheat and boil the cooling water to prevent the water toughening action from proceeding to the deep part of the product were eliminated. Since this relationship is also a requirement for determining the shape with respect to the wall thickness formed between the bottom surface of the recess and the front and back surfaces of the member, the same effect can be obtained.

【0021】このように製造した母材1と、母材の凹部
へ嵌合係止する同形の嵌合材2とを別個に製造し、別個
に水靱処理を施した後、両部材を嵌合することによっ
て、結果的に従来技術を超える肉厚の高Mn鋳鋼製耐摩
耗部材が得られて課題を解決する。
The base material 1 thus manufactured and the fitting material 2 of the same shape which is fitted and locked in the recess of the base material are manufactured separately, and subjected to water toughness treatment separately, and then both members are fitted together. As a result, a wear-resistant member made of high Mn cast steel having a wall thickness exceeding that of the prior art is obtained as a result, and the problem is solved.

【0022】請求項2に係る形態は嵌合材を別種の耐摩
耗部材、たとえば高Cr鋳鉄で置き換えたものである。
耐摩耗部材の母材に他の材質の嵌合材を一体的に複合化
すること自体は既に述べたように公知であり、また本発
明の主目的でもないが、本発明の目的(製品肉厚増に伴
う耐用期間の延長)にこの公知思想を併用すれば、相乗
作用が発揮されることも事実であり、謂わば副次的な作
用によってさらに効果を助長する利点が挙げられる。
According to the second aspect of the present invention, the fitting material is replaced with another type of wear resistant member, for example, high Cr cast iron.
It is known that the fitting material of another material is integrally combined with the base material of the wear-resistant member, as already described, and is not the main object of the present invention. It is also true that if this publicly known idea is used together with the extension of the service life due to the increase in thickness), a synergistic effect is exhibited, and there is an advantage that the effect is further promoted by a so-called secondary effect.

【0023】[0023]

【発明の実施の形態】本発明の基本思想は母材を高Mn
鋳鋼に限定し、水靱が有効に働く限界を大幅にレベルア
ップする点にあるから、従来、高Mn鋳鋼で製造してい
るすべての耐摩耗部材に例外なく適用することが可能で
ある。しかし、その主旨からいえば、製品の大型化、特
に有効摩耗消費量の増大を求める場合に利点が顕われる
から、肉厚増強が稼働効率に直結する部材に対象を絞る
ことが本来の目的に叶うことはいうまでもない。以下、
各実施形態はその点に着目して実施が最適と認められる
ケースを列挙したものである。
BEST MODE FOR CARRYING OUT THE INVENTION The basic idea of the present invention is to make the base material high Mn.
Since it is limited to cast steel and greatly increases the limit at which water toughness effectively works, it can be applied without exception to all wear-resistant members conventionally produced from high-Mn cast steel. However, from the point of view, the advantage is revealed when increasing the size of the product, especially when increasing the effective wear consumption, so the original purpose is to narrow down the target to the member whose thickness increase is directly linked to operating efficiency. It goes without saying that it will come true. Less than,
Each embodiment enumerates the cases in which the implementation is recognized to be optimal, paying attention to that point.

【0024】図1は本発明の第1実施形態であってダブ
ルロールクラッシャーのロールに適用した場合の平面図
(A)、正面図(B)、断面図(C)および斜視図
(D)を示している。2個の円筒形ロールを軸線を並行
に並べた間隙内へ被砕物を装入してロール摩耗面間で挾
圧して破砕する。母材1Aへ嵌合する嵌合材2Aは円柱
形で形成する。
FIG. 1 is a first embodiment of the present invention and is a plan view (A), a front view (B), a sectional view (C) and a perspective view (D) when applied to a roll of a double roll crusher. Shows. An object to be crushed is loaded into a gap in which two cylindrical rolls are arranged with their axes parallel to each other, and the rolls are crushed by pressing between the wear surfaces. The fitting material 2A fitted to the base material 1A is formed in a cylindrical shape.

【0025】図2は第2実施形態でレイモンドミルのブ
ルリングに適用した場合であり、図3はこのブルリング
の内周に沿って転動するローラの例である。何れも平面
図(A)、正面図(B)、断面図(C)および斜視図
(D)で示すように、母材1B,1Cへ円柱形の嵌合材
2B,2Cを嵌合するが、ブルリングの摩耗面である内
周側とローラの摩耗面である外周側へそれぞれ嵌合して
いる。図4は竪型ミルのローラに適用した平面図
(A)、正面図(B)、断面図(C)および斜視図
(D)であって、円柱形の嵌合材2Dを母材1Dの摩耗
面である外周側のテーパー面へ規則的に嵌合する。
FIG. 2 shows a case where the second embodiment is applied to a bull ring of a Raymond mill, and FIG. 3 shows an example of a roller which rolls along the inner circumference of the bull ring. As shown in the plan view (A), front view (B), sectional view (C) and perspective view (D), the cylindrical fitting materials 2B and 2C are fitted to the base materials 1B and 1C, respectively. The inner surface of the bull ring, which is the wear surface, and the outer surface of the roller, which is the wear surface, are fitted together. FIG. 4 is a plan view (A), a front view (B), a cross-sectional view (C) and a perspective view (D) applied to a roller of a vertical mill, in which a cylindrical fitting material 2D is used as a base material 1D. It fits regularly to the tapered surface on the outer peripheral side, which is the worn surface.

【0026】図5はセメントクリンカーなど微粉砕用の
ロッドミルやボールミルの横向き円筒形の粉砕本体の内
周面へ内張りする保護ライナーに適用した場合であり、
平面図(A)、正面図(B)、断面図(C)および斜視
図(D)によって示すように粉砕空間に直面する母材1
Eの内周面側へ円柱形の嵌合材2Eを嵌合する。
FIG. 5 shows a case where the present invention is applied to a protective liner lined on the inner peripheral surface of a laterally cylindrical crushing body of a rod mill or a ball mill for fine crushing such as cement clinker,
Base material 1 facing the grinding space as shown by plan view (A), front view (B), cross-sectional view (C) and perspective view (D)
A cylindrical fitting material 2E is fitted to the inner peripheral surface side of E.

【0027】図6、図7は砕石などの三次破砕に使用す
るハンマークラッシャーやセメント原料(石灰石)を破
砕するクリンカークラッシャーなど衝撃式破砕機に使用
するハンマーに適用した場合を示し、また、図8は廃車
の破砕など重衝撃破砕用シュレッダーミルに使用するハ
ンマーであって、何れも母材1F,1G,1Hに嵌合す
る嵌合材2F,2G,2Hを円柱形で形成する。またカ
ーシュレッダーミルにおける別の耐摩耗部材として、破
砕室の底面に並列して所望サイズに破砕された被砕物片
のみを選択的に排出するグレートバーの存在も見逃せな
いが、図9にこのグレートバーに適用した態様を示し、
母材1Iに円柱形の嵌合材2Iを嵌合したものである。
FIGS. 6 and 7 show a case where the present invention is applied to a hammer used in an impact type crusher such as a hammer crusher used for tertiary crushing of crushed stone or a clinker crusher for crushing cement raw material (limestone), and FIG. Is a hammer used in a shredder mill for heavy impact crushing, such as crushing a scrap car, and in each case, fitting materials 2F, 2G, 2H that fit into the base materials 1F, 1G, 1H are formed in a cylindrical shape. Also, as another wear-resistant member in the car shredder mill, the presence of a great bar that is parallel to the bottom surface of the crushing chamber and selectively discharges only the pieces of the crushed material that have been crushed to the desired size cannot be overlooked. Shows the mode applied to the bar,
The base material 1I is fitted with a cylindrical fitting material 2I.

【0028】コーンクラッシャーやジョークラッシャー
について適用すれば、図10のマントル、図11のバウ
ルライナの実施形態が好適である。これらの型式の破砕
機は本体(ケーシング)内に固定したバウルライナの中
で偏心したマントルが旋動し、バウルライナの内周面と
マントルの外周面間で被砕物を圧潰する原理に立つか
ら、それぞれの摩耗面に嵌合した円柱形の嵌合材2J、
2Kによって健全な製品肉厚を大幅に増大して耐用期間
を延長する。
When applied to a cone crusher or a jaw crusher, the embodiment of the mantle of FIG. 10 and the bawl liner of FIG. 11 is suitable. In these types of crushers, the eccentric mantle rotates in the bawl liner fixed in the main body (casing), and the principle of crushing the object to be crushed between the inner surface of the bawl liner and the outer surface of the mantle is considered. Cylindrical fitting material 2J fitted to the wear surface of
2K greatly increases the sound product wall thickness and extends the service life.

【0029】図12から図15まではそれぞれ大型竪型
ミルの分割型テーブルに適用した実施形態を示し、図1
2は断面が曲面の摩耗面へ円柱形の嵌合材2Lを、図1
3は断面が平面の摩耗面へ円柱形の嵌合材2Mを、図1
4は断面が平面の摩耗面へ角柱形の嵌合材2Nを、さら
に図15では断面が平面の摩耗面へ八角柱形の嵌合材2
Oをそれぞれ嵌合した態様を示す。また、図16は該分
割型テーブル上で斜めに吊支されてテーブル面との間へ
被砕物を挾圧して粉砕するローラの例であり、円柱形の
嵌合材2Pを嵌合して肉厚増加を図った態様を示す。
FIGS. 12 to 15 show an embodiment applied to a split type table of a large vertical mill, respectively, and FIG.
2 shows a cylindrical fitting material 2L on the wear surface having a curved cross section, as shown in FIG.
3 shows a cylindrical fitting material 2M on a wear surface having a flat cross section.
4 is a prismatic fitting material 2N to a wear surface having a flat cross section, and in FIG. 15, an octagonal fitting material 2N is a wear surface having a flat cross section.
The mode which each fitted O is shown. Further, FIG. 16 shows an example of a roller which is slidably supported on the split type table and crushes an object to be crushed by pressing it against the table surface. The mode which aimed at thickness increase is shown.

【0030】嵌合材2を母材1へ嵌合する方法について
はとくに限定するものではなく、公知である従来技術の
中から適宜選択すれば足りる。たとえば図17(A)
(B)(C)に示す嵌合方法は出願人自身が提示した実
公平06−34824号公報に係る従来技術を準用した
ものであり、嵌合材2に頸部21を設け、その底面に部
分的な突条22を突設したものである。一方、母材1に
は円孔11を穿孔するが、この円孔に沿った縦溝12と
その底面に連通する横溝13を設け、前記突条22を縦
溝12に嵌入してから水平方向に回動して固定する方式
であり、ワンタッチに近い簡単な作業で確実な嵌合を果
す。嵌合材が円柱形以外の場合は強力な接着剤を使用し
て固定するのが一般的である。
The method for fitting the fitting material 2 to the base material 1 is not particularly limited and may be appropriately selected from known conventional techniques. For example, FIG. 17 (A)
The fitting method shown in (B) and (C) is a modification of the conventional technique disclosed in Japanese Utility Model Publication No. 06-34824, which is proposed by the applicant, in which the fitting member 2 is provided with the neck portion 21 and the bottom surface thereof. The projection 22 is partially provided. On the other hand, a circular hole 11 is bored in the base material 1, and a vertical groove 12 along the circular hole and a horizontal groove 13 communicating with the bottom surface thereof are provided, and the protrusion 22 is fitted into the vertical groove 12 and then in the horizontal direction. This is a method of rotating and fixing to a point, and secure fitting is achieved by a simple operation close to one-touch. When the fitting material is other than a cylindrical shape, it is generally fixed by using a strong adhesive.

【0031】[0031]

【発明の効果】本発明は以上に述べた通り最も一般的、
かつ経済的な耐摩耗部材として最も広範囲の分野で使用
される高Mn鋳鋼が、装置の大型化が求められるにも拘
らず、有効摩耗消費量が材質特有の炭素固溶限度によっ
て一定の肉厚制限を余儀なく強いられ、100mm以上
の肉厚に対しては事実上、健全な機能を保証できなかっ
た課題を克服し、大幅な製品サイズ、とくに摩耗面の有
効消費量を大幅に向上して耐用期間を延長する顕著な効
果がある。本発明の実施によって従来の最大の課題であ
った肉厚制限から開放され、部材取り替えのための操業
中断、そのための装置全体の生産性の低下や取り替え工
事の頻度の減小に伴うメンテナンス費用の軽減など、も
たらす利点は枚挙に暇がない。
As described above, the present invention is the most general,
High Mn cast steel, which is used as the most economical wear resistant member in a wide range of fields, requires a large thickness of the equipment, but its effective wear consumption is constant due to the carbon solid solution limit peculiar to the material. It has been forced to be restricted and overcomes the problem that it could not guarantee a sound function in practice for wall thicknesses of 100 mm or more, greatly improving the product size, especially the effective consumption of the wear surface, and durability. There is a remarkable effect of extending the period. By implementing the present invention, the wall thickness limitation, which has been the biggest problem in the past, is released, the operation is interrupted for the replacement of the members, the productivity of the entire apparatus for that is lowered, and the maintenance cost accompanying the reduction of the frequency of replacement work is reduced. There is no time to enumerate the benefits that it brings, such as reduction.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の第1実施形態を示す平面図(A)、正
面図(B)、断面図(C)および斜視図(D)である。
FIG. 1 is a plan view (A), a front view (B), a sectional view (C) and a perspective view (D) showing a first embodiment of the present invention.

【図2】本発明の第2実施形態を示す平面図(A)、正
面図(B)、断面図(C)および斜視図(D)である。
FIG. 2 is a plan view (A), a front view (B), a sectional view (C) and a perspective view (D) showing a second embodiment of the present invention.

【図3】本発明の第3実施形態を示す平面図(A)、正
面図(B)、断面図(C)および斜視図(D)である。
FIG. 3 is a plan view (A), a front view (B), a sectional view (C) and a perspective view (D) showing a third embodiment of the present invention.

【図4】本発明の第4実施形態を示す平面図(A)、正
面図(B)、断面図(C)および斜視図(D)である。
FIG. 4 is a plan view (A), a front view (B), a sectional view (C) and a perspective view (D) showing a fourth embodiment of the present invention.

【図5】本発明の第5実施形態を示す平面図(A)、正
面図(B)、断面図(C)および斜視図(D)である。
FIG. 5 is a plan view (A), a front view (B), a sectional view (C) and a perspective view (D) showing a fifth embodiment of the present invention.

【図6】本発明の第6実施形態を示す平面図(A)、正
面図(B)、断面図(C)および斜視図(D)である。
FIG. 6 is a plan view (A), a front view (B), a sectional view (C) and a perspective view (D) showing a sixth embodiment of the present invention.

【図7】本発明の第7実施形態を示す平面図(A)、正
面図(B)、断面図(C)および斜視図(D)である。
FIG. 7 is a plan view (A), a front view (B), a sectional view (C) and a perspective view (D) showing a seventh embodiment of the present invention.

【図8】本発明の第8実施形態を示す平面図(A)、正
面図(B)、断面図(C)および斜視図(D)である。
FIG. 8 is a plan view (A), a front view (B), a sectional view (C) and a perspective view (D) showing an eighth embodiment of the present invention.

【図9】本発明の第9実施形態を示す平面図(A)、正
面図(B)、断面図(C)および斜視図(D)である。
FIG. 9 is a plan view (A), a front view (B), a sectional view (C) and a perspective view (D) showing a ninth embodiment of the present invention.

【図10】本発明の第10実施形態を示す平面図
(A)、正面図(B)、断面図(C)および斜視図
(D)である。
FIG. 10 is a plan view (A), a front view (B), a sectional view (C) and a perspective view (D) showing a tenth embodiment of the present invention.

【図11】本発明の第11実施形態を示す平面図
(A)、正面図(B)、断面図(C)および斜視図
(D)である。
FIG. 11 is a plan view (A), a front view (B), a sectional view (C) and a perspective view (D) showing an eleventh embodiment of the present invention.

【図12】本発明の第12実施形態を示す平面図
(A)、正面図(B)、断面図(C)および斜視図
(D)並びに全体図(E)である。
FIG. 12 is a plan view (A), a front view (B), a sectional view (C), a perspective view (D) and an overall view (E) showing a twelfth embodiment of the present invention.

【図13】本発明の第13実施形態を示す平面図
(A)、正面図(B)、断面図(C)および斜視図
(D)並びに全体図(E)である。
FIG. 13 is a plan view (A), a front view (B), a sectional view (C), a perspective view (D), and an overall view (E) showing a thirteenth embodiment of the present invention.

【図14】本発明の第14実施形態を示す平面図
(A)、正面図(B)、断面図(C)および斜視図
(D)並びに全体図(E)である。
FIG. 14 is a plan view (A), a front view (B), a sectional view (C), a perspective view (D) and an overall view (E) showing a fourteenth embodiment of the present invention.

【図15】本発明の第15実施形態を示す平面図
(A)、正面図(B)、断面図(C)および斜視図
(D)並びに全体図(E)である。
FIG. 15 is a plan view (A), a front view (B), a sectional view (C), a perspective view (D) and an overall view (E) showing a fifteenth embodiment of the present invention.

【図16】本発明の第16実施形態を示す平面図
(A)、正面図(B)、断面図(C)および斜視図
(D)である。
FIG. 16 is a plan view (A), a front view (B), a sectional view (C) and a perspective view (D) showing a sixteenth embodiment of the present invention.

【図17】本発明の嵌合材の嵌合方法の一態様を示す正
面図(A)と嵌合材の正面図(B)、平面図(C)であ
る。
17A and 17B are a front view (A), a front view (B), and a plan view (C) of a fitting member showing one embodiment of the fitting member fitting method of the present invention.

【図18】オーステナイト13%高Mn鋳鋼の炭素の固
溶限と温度の関係をプロットした図表である。
FIG. 18 is a chart in which the relationship between the solid solution limit of carbon and the temperature of austenitic 13% high Mn cast steel is plotted.

【図19】各種高Mn鋳鋼材における肉厚差(1インチ
と6インチ)に伴う伸び%の劣化を示した図表である。
FIG. 19 is a chart showing the deterioration of elongation% due to the difference in wall thickness (1 inch and 6 inches) in various high Mn cast steel materials.

【図20】各種高Mn鋳鋼材における肉厚差(1インチ
と6インチ)に伴うアイゾット衝撃値の劣化を示した図
表である。
FIG. 20 is a chart showing the deterioration of Izod impact value due to the difference in wall thickness (1 inch and 6 inches) in various high Mn cast steel materials.

【図21】各種高Mn鋳鋼材における肉厚差(1インチ
と6インチ)に伴う実用引張り強度の劣化を示した図表
である。
FIG. 21 is a chart showing deterioration in practical tensile strength due to difference in wall thickness (1 inch and 6 inches) in various high Mn cast steel materials.

【図22】各種高Mn鋳鋼材における肉厚差(1インチ
と6インチ)に伴う抗圧力の劣化を示した図表である。
FIG. 22 is a chart showing deterioration of coercive pressure due to wall thickness difference (1 inch and 6 inches) in various high Mn cast steel materials.

【図23】従来技術を示す斜視図である。FIG. 23 is a perspective view showing a conventional technique.

【符号の説明】[Explanation of symbols]

1 母材(高Mn鋳鋼材) 2 嵌合材(高Mn鋳鋼材、または他の耐摩耗部材) 1 Base material (high Mn cast steel material) 2 Fitting material (high Mn cast steel material, or other wear resistant member)

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) B02C 1/00 - 7/18 B02C 15/00 - 17/24 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) B02C 1/00-7/18 B02C 15/00-17/24

Claims (2)

    (57)【特許請求の範囲】(57) [Claims]
  1. 【請求項1】 高Mn鋳鋼よりなる耐摩耗部材におい
    て、水靭作用が発現する表面からの最短距離が、耐摩耗
    部材内の摩耗面のいかなる部分においても健全な組織と
    して許容限度内の物性値を保証し得る100mmを超え
    ないように凹部を形成し、該凹部の最大差し渡し長さが
    凹部と凹部との間を形成する肉厚、または凹部底面と部
    材表裏面との間で形成する肉厚の何れよりも大きく設定
    した広い開口面を通じて冷却水の流動を活発に入れ替え
    形状で鋳造した母材1と、該凹部11へ嵌合係止する
    同型の高Mn鋳鋼の嵌合材2とを一体的に組合わせて
    大肉厚が100mmを超えることを特徴とする高Mn鋳
    鋼よりなる大型の耐摩耗部材。
    1. In a wear-resistant member made of high Mn cast steel, the shortest distance from the surface where water toughness appears is that a healthy structure is obtained at any part of the wear surface in the wear- resistant member.
    The thickness of the concave portion is formed so as not to exceed 100 mm that can guarantee the physical property value within the permissible limit, and the maximum passing length of the concave portion forms between the concave portions, or the bottom surface of the concave portion and the front and back surfaces of the member. The flow of cooling water is actively exchanged through a wide opening that is set larger than any of the wall thickness formed between
    That the preform 1 that is cast in the shape, by integrally combining the insert members 2 high Mn cast steel of the same type for fitting engagement to the recess 11 uppermost
    Large wear-resistant member of a large wall thickness made of a high Mn cast steel, characterized in that more than 100 mm.
  2. 【請求項2】 請求項1において嵌合材2を高Mn鋳鋼
    以外の材質で形成することを特徴とする高Mn鋳鋼より
    なる耐摩耗部材。
    2. The wear resistant member made of high Mn cast steel according to claim 1, wherein the fitting material 2 is made of a material other than the high Mn cast steel.
JP27509397A 1997-09-22 1997-09-22 Large wear-resistant member made of high Mn cast steel Expired - Lifetime JP3365481B2 (en)

Priority Applications (1)

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JP27509397A JP3365481B2 (en) 1997-09-22 1997-09-22 Large wear-resistant member made of high Mn cast steel

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Application Number Priority Date Filing Date Title
JP27509397A JP3365481B2 (en) 1997-09-22 1997-09-22 Large wear-resistant member made of high Mn cast steel

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JPH1190251A JPH1190251A (en) 1999-04-06
JP3365481B2 true JP3365481B2 (en) 2003-01-14

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006059894A1 (en) 2006-12-19 2008-06-26 Terex Gmbh Wear element and thus equipped component
IN2014CN03542A (en) * 2012-01-16 2015-09-25 Sintokogio Ltd
JP2013146675A (en) * 2012-01-19 2013-08-01 Kurimoto Ltd Slug crusher
JP2016073946A (en) * 2014-10-08 2016-05-12 株式会社Ihi Grinding roller and roller mill

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