JPH02303547A - Crushing tooth of sintered ore crushing machine and its production - Google Patents
Crushing tooth of sintered ore crushing machine and its productionInfo
- Publication number
- JPH02303547A JPH02303547A JP12597389A JP12597389A JPH02303547A JP H02303547 A JPH02303547 A JP H02303547A JP 12597389 A JP12597389 A JP 12597389A JP 12597389 A JP12597389 A JP 12597389A JP H02303547 A JPH02303547 A JP H02303547A
- Authority
- JP
- Japan
- Prior art keywords
- sintered
- tooth
- teeth
- crushing
- cast iron
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 29
- 239000000956 alloy Substances 0.000 claims abstract description 29
- 229910001037 White iron Inorganic materials 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000005275 alloying Methods 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract description 6
- 239000002245 particle Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 9
- 229910001018 Cast iron Inorganic materials 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 240000002930 Alternanthera sessilis Species 0.000 description 2
- 235000015579 Alternanthera sessilis Nutrition 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 229910000905 alloy phase Inorganic materials 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Crushing And Pulverization Processes (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本願発明は製鉄用の高炉向けに焼結した鉱材を高温下で
分解するために使用される破砕機の破砕歯に係る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a crushing tooth for a crusher used for decomposing sintered ore at high temperatures for blast furnaces for steel manufacturing.
[従来の技術]
製鉄用に今日、最も広く使用される鉱石は経済的理由に
よって粉鉱である。粉鉱はそのままでは高炉に装入して
製錬することが困難であるから、大半は焼結炉において
焼結し、これを所望の大きさに分塊して供するようにし
ている。焼結鉱が排出されるときの温度は400〜60
0℃が標準とされ、この温度下で帯状に結合した鉱材を
破砕せず温度が低下した後に破砕しようとすれば、大き
な剪断力が必要となり困難さが増大する。BACKGROUND OF THE INVENTION The ore most widely used today for iron and steel production is fine ore for economic reasons. Since it is difficult to charge powdered ore as it is into a blast furnace and smelt it, most of it is sintered in a sintering furnace, and then it is provided after being agglomerated into a desired size. The temperature when sintered ore is discharged is 400-60
The standard temperature is 0°C, and if an attempt is made to crush ore bound in a band shape at this temperature after the temperature has fallen, a large shearing force will be required, which will increase the difficulty.
破砕機の破砕歯としては、いわゆる先山と受歯の噛み込
みによる剪断分断が最も広く用いられる。As the crushing teeth of a crusher, the most widely used type is shearing and breaking by biting between a leading edge and a receiving tooth.
第4図イ2口はシングルロール型の破砕歯を示し、先山
7aは高温耐摩耗鋳1(例えば13Cr鋼)の一体鋳造
で製造し、受歯1aは基材2aの上に高温耐摩耗鋳鋼の
歯先3aを冠せ中空部に冷却水を流す仕組となっている
。Fig. 4 A 2 shows a single-roll type crushing tooth, the leading edge 7a is manufactured by integral casting of high-temperature wear-resistant casting 1 (for example, 13Cr steel), and the receiving tooth 1a is cast on the base material 2a. It has a cast steel tooth tip 3a that allows cooling water to flow into the hollow part.
しかし、このような構成では側底苛酷な使用条件に耐え
られず草々に摩耗して破砕能力を失って了うので、先山
についても基材の先端上に耐摩耗性歯先を冠せ摩耗した
ときにこの歯先だけを取替える方式が一般化した。However, such a structure cannot withstand the harsh operating conditions of the side bottom and will wear out and lose its crushing ability. Therefore, for the tip of the tip, a wear-resistant tooth tip is placed on the tip of the base material to prevent wear. The method of replacing only the tip of the tooth has become commonplace.
両歯光の先端は高熱の帯体をその間に噛み込んで引き裂
くのであるから、最高の耐熱耐摩耗の材質が必要であり
、種々試みられてきたが、この要請に応えた最新の材質
としては「焼結炭化物合金と鋳鉄からなる複合体」 (
特公昭60−11096号公報)が挙げられる。Since the tip of the double-toothed beam catches the high-temperature band between them and tears it, a material with the highest heat and abrasion resistance is required, and various attempts have been made, but the latest material that meets this requirement is "Composite made of sintered carbide alloy and cast iron" (
(Japanese Patent Publication No. 60-11096).
この技術は焼結炭化物合金と鋳鉄よりなる複合体よりな
るが、その特徴とするところは、鋳鉄それ自体は低い耐
摩耗性および硬度を有する黒鉛鋳鉄で炭素当量を2.5
乃至6.0に調整したことと、両者の間に中間合金相ま
たは転移帯域が形成されており、かつ焼結炭化物合金の
20%〜80%が転移帯域にあることでめる。This technology consists of a composite made of a sintered carbide alloy and cast iron, and its characteristics are that the cast iron itself is graphite cast iron with low wear resistance and hardness, and has a carbon equivalent of 2.5
It can be seen that the sintered carbide alloy is adjusted to 6.0 to 6.0, that an intermediate alloy phase or transition zone is formed between the two, and that 20% to 80% of the sintered carbide alloy is in the transition zone.
[発明が解決しようとする課題]
しかしながら超硬性である焼結炭化物合金が摩耗に濃さ
れる全表面を完全に被覆することは不可能でおり、表面
に浸透した鋳鉄が黒鉛系であるときは、その低硬度、低
耐摩耗性のために使用条件によってはむしろ劣性化の方
向へ導く危険が懸念され、硬質の粉粒体による表面の引
掻き、衝突。[Problems to be Solved by the Invention] However, it is impossible for the superhard sintered carbide alloy to completely cover the entire surface, which is prone to wear, and when the cast iron that penetrates the surface is graphite-based, Due to its low hardness and low abrasion resistance, there is a concern that it may lead to deterioration depending on the usage conditions, and the surface may be scratched or hit by hard particles.
擦過流動のために侵されるアブレージヨン摩耗に対して
はこの懸念がざらに強い。This concern is even more acute for abrasion wear caused by frictional flow.
本願発明はここに述べた課題を解決するために、特に高
温アブレージヨン摩耗に焦点を合せた素材とその組合せ
による構成を創作し、使用条件に最も適合した焼結鉱破
砕機の破砕歯およびその製造方法の提供を目的とするも
のである。In order to solve the problems described herein, the present invention has created a configuration using materials and combinations thereof that are particularly focused on high-temperature abrasion wear, and has created a crushing tooth for a sintered ore crusher that is most suitable for the usage conditions and its manufacture. The purpose is to provide a method.
[課題を解決するための手段]
本願発明に係る焼結鉱破砕機の破砕歯は、先山および受
歯の基材先端上にそれぞれ所望の形状を形成する白鋳鉄
の歯先を被冠し、当該歯先のそれぞれの先端面および所
望の側面に焼結炭化物合金の細片および/又は超硬質合
金の焼結多面体を緊密に抱持したことにより前記の課題
を解決した。[Means for Solving the Problems] The crushing teeth of the sintered ore crusher according to the present invention are crowned with white cast iron tooth tips that form desired shapes on the base material tips of the leading peak and receiving tooth, respectively. The above-mentioned problem has been solved by tightly enclosing strips of sintered carbide alloy and/or sintered polyhedrons of superhard alloy on each tip surface and desired side surface of the tooth tip.
ざらに具体的には、焼結炭化物合金の細片が破砕体、粉
状体または圧縮成形体のいずれか、またはその混合より
なり、かつ全量の少なくとも70%が2〜20mの粒径
よりなること、またそれぞれの歯先の先端面に超硬質合
金の焼結多面体をその高さの20倍以下、又はその幅の
10倍以下のいずれか小さい数値より狭い間隔をもって
配設すること、白鋳鉄は合金元素添加による複合炭化物
を主体とし、炭素含量が2.0%から4.5%の範囲で
あるのに対し、 (Cr+W+V+Ta+Ti士N
b ) /Cが1から18の範囲であり、がっN i
+Mo+Cuが0%がら15%の範囲であることを示し
た。More specifically, the pieces of the sintered carbide alloy consist of crushed bodies, powder bodies, compacted bodies, or a mixture thereof, and at least 70% of the total amount consists of particles with a particle size of 2 to 20 m. Also, sintered polyhedrons of cemented carbide are arranged on the tip surface of each tooth tip at intervals narrower than 20 times its height or 10 times its width, whichever is smaller, white cast iron. is mainly composed of composite carbide due to the addition of alloying elements, and the carbon content ranges from 2.0% to 4.5%.
b) /C is in the range from 1 to 18, and N i
+Mo+Cu was shown to be in the range of 0% to 15%.
また、当該歯先の製造方法としては、層厚Tctytの
焼結炭化物合金層、超硬質合金の焼結多面体層へ、白鋳
鉄を自己の融点より50T’Cから180(1,75+
T>’Cの高温の溶融状態より注湯した歯先鋳造品を基
体上に被冠し固着する手順を併せ開示した。In addition, as for the manufacturing method of the tooth tip, white cast iron is added to a sintered carbide alloy layer with a layer thickness of Tctyt and a sintered polyhedral layer of super hard alloy from 50T'C to 180 (1,75+) from its own melting point.
A procedure for capping and fixing a tooth tip cast product poured from a molten state at a high temperature of T>'C on a base body is also disclosed.
[作用]
白鋳鉄は黒鉛鋳鉄に比べ、炭化鉄、マルテンサイトより
なるきわめて高硬度の材料であるが、耐摩耗性をさらに
向上させるためには合金元素を添加して溶解し、凝固後
の組織として高硬度の複合炭化物をマトリックス(母相
)上に析出させ、かつマトリックス自体の硬度をも高め
るのが周知である。[Function] Compared to graphite cast iron, white cast iron is an extremely hard material made of iron carbide and martensite, but in order to further improve its wear resistance, alloying elements are added and melted to improve the structure after solidification. It is well known that a highly hard composite carbide is precipitated on a matrix (mother phase) to increase the hardness of the matrix itself.
しかし本願として最も好ましい範囲は、CMを2.0%
から4.5%の間において(Cr+W+V+Ta+T
i ±N b > /Cの比率を1から18の範囲に入
ることを推奨できる。比率が1に満たないときは複合炭
化物の形成が少なきに失し、マトリックス硬度が低く黒
鉛の晶出を生じる。またこの比率が12を越えるときは
炭化物形成のためのCが不足し焼結炭化物合金よりCを
奪い、両者の界面に脆化相を形成する。また適量のNi
、Mo。However, the most preferable range for this application is 2.0% CM.
to 4.5% (Cr+W+V+Ta+T
It is recommended that the ratio of i ±N b > /C be in the range of 1 to 18. When the ratio is less than 1, the formation of composite carbides is slightly lost, the matrix hardness is low, and graphite crystallization occurs. Moreover, when this ratio exceeds 12, there is a shortage of C for carbide formation, and C is taken away from the sintered carbide alloy, forming a brittle phase at the interface between the two. Also, an appropriate amount of Ni
, Mo.
Cuの添加はマトリックスを安定化し、過剰の2次炭化
物の析出を抑制しマトリックスの硬度低下を防ぐのに有
効である。しかしN i 十Mo+Cuを15%以上添
加してもマトリックスの安定性はそれ以上改善しないの
でその添加上限を15%とした。Addition of Cu is effective in stabilizing the matrix, suppressing precipitation of excessive secondary carbides, and preventing reduction in hardness of the matrix. However, even if 15% or more of N i +Mo+Cu was added, the stability of the matrix would not be improved any further, so the upper limit of the addition was set at 15%.
また焼結炭化物合金粒子間および超硬質合金の焼結多面
体間に形成される狭い空間に白鋳鉄溶湯が完全に浸透す
るためには、注湯温度はその層厚Tcmに対し白鋳鉄の
融点より少なくとも50T℃以上である必要がある。ま
た過度の焼結炭化物合金および超硬質合金の焼結多面体
の白鋳鉄への溶解を避けるために、注湯温度は白鋳鉄の
融点より180 (1,75+T>’Cの範囲でなけれ
ばならない。In addition, in order for the white cast iron molten metal to completely penetrate into the narrow spaces formed between the sintered carbide alloy particles and between the sintered polyhedra of the superhard alloy, the pouring temperature must be lower than the melting point of the white cast iron for the layer thickness Tcm. The temperature needs to be at least 50T°C or higher. In addition, in order to avoid excessive dissolution of the sintered polyhedron of sintered carbide alloy and cemented carbide into white cast iron, the pouring temperature must be in the range of 180°C (1,75+T>'C) below the melting point of white cast iron.
粒子の性状については粒径が小さすぎると焼結炭化物合
金間隔が小さくなりすぎ、鋳込温度をあげても焼結炭化
物粒子および超硬質合金の焼結多面体間に白鋳鉄が充分
に浸透しない。また温度をあげすぎると焼結炭化物合金
および超硬質合金の焼結多面体の白鋳鉄への溶融量が箸
しく増大する。Regarding the properties of the particles, if the particle size is too small, the spacing between the sintered carbide alloys becomes too small, and even if the casting temperature is raised, the white cast iron will not penetrate sufficiently between the sintered carbide particles and the sintered polyhedrons of the superhard alloy. Furthermore, if the temperature is raised too much, the amount of sintered polyhedrons of sintered carbide alloys and superhard alloys melted into white cast iron increases considerably.
粒径が粗大にすぎると焼結炭化物合金および超硬質合金
の焼結多面体の溶融量が著しく増大する。If the particle size is too coarse, the amount of melting of the sintered polyhedrons of sintered carbide alloys and superhard alloys increases significantly.
粒径が粗大に過ぎると焼結炭化物合金の体積率が低下す
るばかりでなく、粒子間白鋳鉄母材のアブレーシブ粒子
により切削される平均粒子間距離が大きくなり耐摩耗性
は劣化する。従って、2!Mi〜20mm粒子が全体の
70%以上となる構成が最適である。If the particle size is too coarse, not only will the volume fraction of the sintered carbide alloy decrease, but the average interparticle distance cut by the abrasive particles of the interparticle white cast iron base material will increase, resulting in a deterioration of wear resistance. Therefore, 2! A configuration in which 70% or more of the particles are Mi~20 mm is optimal.
超硬質合金の焼結多面体の配設に許容される最大間隔は
適用される母材の材質およびその使用条件によって相当
の変動幅を持っている。実験的には高さTの20倍、ま
たは幅りの10倍のいずれか小さい方を越えてはならな
いという原則が見出された。The maximum distance allowed for the arrangement of sintered polyhedrons of cemented carbide varies considerably depending on the material of the base material to which it is applied and the conditions of its use. It has been experimentally found that the width should not exceed 20 times the height T or 10 times the width, whichever is smaller.
[実施例]
(1)第1図は本願発明の第1実施例を示す受@1の基
材2の先端上に被冠した歯先3の正面断面図である。[Example] (1) Fig. 1 is a front sectional view of a tooth tip 3 crowned on the tip of a base material 2 of a receiver 1 showing a first example of the present invention.
歯先3は炭化タングステンをコバルトを結合材として焼
結成形した15s厚さの炭化物層5で歯先の先端面を形
成し、後背の母材4としては3.0%C−15%Cr−
4%V−3%Ti−2%MO−1%Cuよりなる白鋳鉄
を以て抱持させている。The tip surface of the tooth tip 3 is formed of a carbide layer 5 with a thickness of 15 s formed by sintering tungsten carbide with cobalt as a binder, and the rear base material 4 is made of 3.0%C-15%Cr-
It is supported by white cast iron made of 4%V-3%Ti-2%MO-1%Cu.
比較例1は2.7%C−28%Cr白鋳鉄で同一形状の
歯先全部を構成したもの、比較例2は鋳鋼で製作した歯
先の当該先端面を 4%C−30%Cr−2%Mo−2
%Niの溶接棒で硬化肉盛したものを当て、同一条件で
使用不可能となるまで破砕機において使用した。In Comparative Example 1, the entire tooth tip of the same shape was made of 2.7%C-28%Cr white cast iron, and in Comparative Example 2, the tip surface of the tooth tip was made of cast steel with 4%C-30%Cr- 2%Mo-2
%Ni welding rod and used in a crusher under the same conditions until it became unusable.
耐用日数は次のように記録されている。The useful life is recorded as follows:
(a)本願第一実施例 280日
(b)比較例1 60日
(C)比較例2 45日
(2)第2図は本願発明の第2実施例を示す水冷タイプ
の受歯1の基材2の先端上に被冠した歯先3の正面断面
図で必る。(a) First embodiment of the present invention 280 days (b) Comparative example 1 60 days (C) Comparative example 2 45 days (2) This is a front sectional view of the tooth tip 3 crowned on the tip of the material 2.
歯先の母材4は3.2%C−24%Cr−3%W−〇、
9%Ni−0,5%MOよりなる白鋳鉄であり、歯先の
先端面は炭化タングステンをコバルトを結合材として焼
結成形したBmm厚さの炭化物層5で形成し、この先端
面に近い側面に外径Bmmφ、内径2mmφ、高さ6m
mの定形円筒型に成形した同じ炭化タングステンの成形
体6を等間隔12sを設けて3列に配設した。この歯先
を水冷なしで実地に使用する一方、前項における比較例
2と同一内容で施工し水冷下で使用した比較例3と耐用
日数を比較した。The base material 4 of the tooth tip is 3.2%C-24%Cr-3%W-〇,
It is white cast iron made of 9% Ni-0.5% MO, and the tip surface of the tooth tip is formed with a carbide layer 5 of Bmm thickness formed by sintering tungsten carbide with cobalt as a binder, and the tip surface is close to this tip surface. Outer diameter Bmmφ, inner diameter 2mmφ, height 6m on the side
The same molded bodies 6 of tungsten carbide molded into a regular cylindrical shape of m were arranged in three rows with equal intervals of 12 s. While this tooth tip was actually used without water cooling, the service life was compared with Comparative Example 3, which was constructed in the same way as Comparative Example 2 in the previous section and used under water cooling.
(a)本願第二実施例 340日
(b)比較例3 70日
(3)第3図は本願発明の第3実施例である兎肉7の基
材8の先端上に歯先9を被冠したもので、歯先9の母材
10は3.1%C−24%Cr−3%W−1%Nb−1
%Ta−3%Mo残り鉄の成分よりなる白鋳鉄であり、
この歯先の先端面に12mm厚さの炭化タングステンを
焼結した炭化物層11と、側面に直径4mm、高さ12
mmの円柱状に成形した炭化タングステンの成形体12
を中心間の距離を平均10mで3列に配設した。(a) Second embodiment of the present application 340 days (b) Comparative example 3 70 days (3) Fig. 3 shows a third embodiment of the present invention in which tooth tips 9 are covered on the tip of the base material 8 of rabbit meat 7. The base material 10 of the tooth tip 9 is 3.1%C-24%Cr-3%W-1%Nb-1.
%Ta-3%Mo White cast iron consisting of residual iron components,
There is a carbide layer 11 made of sintered tungsten carbide with a thickness of 12 mm on the tip surface of this tooth tip, and a carbide layer 11 with a diameter of 4 mm and a height of 12 mm on the side surface.
Tungsten carbide molded body 12 molded into a cylindrical shape of mm
were arranged in three rows with an average distance of 10 m between centers.
比較される比較例4は同一形状の兎肉を3.0%C−2
9%0r−1%Mo白鋳鉄で製作し、実地に試用し耐用
日数を記録した。Comparative Example 4 uses rabbit meat of the same shape as 3.0% C-2.
It was manufactured from 9% 0r-1% Mo white cast iron, was used on a trial basis, and its service life was recorded.
(a)本願第三実施例 280日
(b)比較例4 60日
[発明の効果]
本願発明は以上に述べたとおり、高温下のアブレージヨ
ン摩耗に対し後群に耐用性を有する歯先を創成し、焼結
鉱破砕機の破砕歯として適用したところ、従来きわめて
優れた耐摩性を具えていると定評のあった公知の歯先を
実に数倍上回る顕著な耐用日数の延長を記録した。(a) Third embodiment of the present application 280 days (b) Comparative example 4 60 days [Effects of the invention] As described above, the present invention creates a tooth tip that has durability in the rear group against abrasion wear at high temperatures. However, when applied as a crushing tooth for a sintered ore crusher, the service life was significantly extended several times over that of a known tooth tip, which had a reputation for having extremely high wear resistance.
破砕機に対する摩耗部材の取替えに要する煩瑣な作業や
、その間の焼結設備全体との兼ね合いなどを参酌すると
、歯先自体の単価の高騰を補ったうえ、差引なお大きな
便益をもたらすものである。Taking into consideration the complicated work required to replace the worn parts of the crusher and the balance with the overall sintering equipment, this method compensates for the soaring unit cost of the tooth tips themselves, and still provides significant benefits.
第1図から第3図はそれぞれ異なる本願発明の実施例を
示す正面断面図、第4図イ1口は従来の技術を示す正面
図(イ)と側面断面図(ロ)である。1 to 3 are front sectional views showing different embodiments of the present invention, and FIG.
Claims (5)
機へ装着する鬼歯と受歯よりなる破砕歯において、鬼歯
および受歯の基材先端上にそれぞれ所望の形状を形成す
る白鋳鉄の歯先を被冠し、当該歯先のそれぞれの先端面
および所望の側面に焼結炭化物合金の細片および/又は
超硬質合金の焼結多面体を緊密に抱持したことを特徴と
する焼結鉱破砕機の破砕歯。(1) In a crushing tooth consisting of a demon tooth and a receiving tooth, which are attached to a crusher that blooms sintered ore for blast furnaces at high temperatures, desired shapes are formed on the base material tips of the demon tooth and receiving tooth, respectively. The tips of the white cast iron teeth to be formed are crowned, and the tips of the teeth are closely held with strips of sintered carbide alloy and/or sintered polyhedrons of cemented carbide on the respective tip surfaces and desired side surfaces. Characteristic crushing teeth of the sintered ore crusher.
体、粒状体または圧縮成形体のいずれか、またはその混
合よりなり、かつ全量の少なくとも70%が2〜20m
mの粒径よりなる焼結鉱破砕機の破砕歯。(2) In claim 1, the pieces of the sintered carbide alloy are composed of crushed bodies, granulated bodies, compression molded bodies, or a mixture thereof, and at least 70% of the total amount is 2 to 20 m
The crushing teeth of a sintered ore crusher have a grain size of m.
面に超硬質合金の焼結多面体を、その高さの20倍以下
、又はその幅の10倍以下のいずれか小さい数値より狭
い間隔をもつて配設する焼結鉱破砕機の破砕歯。(3) In claim 1 or 2, the sintered polyhedrons of cemented carbide are arranged on the tip surface of each tooth tip at intervals narrower than the smaller value of 20 times or less of the height or 10 times or less of the width. The crushing teeth of the sintered ore crusher are installed with
元素添加による複合炭化物を主体とし、炭素含有量が2
.0%から4.5%の範囲であるのに対し、(Cr+W
+V+Ta+Ti+Nb)/Cが1から18の範囲であ
り、かつ Ni+Mo+Cuが0%から15%の範囲で
ある焼結鉱破砕機の破砕歯。(4) In any one of claims 1 to 3, the white cast iron is mainly composed of composite carbide by adding alloying elements, and has a carbon content of 2.
.. While it ranges from 0% to 4.5%, (Cr+W
+V+Ta+Ti+Nb)/C is in the range of 1 to 18, and Ni+Mo+Cu is in the range of 0% to 15%.
結多面体層へ、白鋳鉄を自己の融点より50T℃から1
80(1.75+T)℃の高温の溶融状態より注湯した
歯先鋳造品を基体上に被冠し固着することを特徴とする
焼結鉱破砕機破砕歯の製造方法。(5) White cast iron is applied to the sintered carbide alloy layer with a layer thickness of Tcm and the sintered polyhedral layer of superhard alloy from 50T℃ below its own melting point.
A method for manufacturing a crushing tooth for a sintered ore crusher, characterized in that a tooth tip cast product poured from a molten state at a high temperature of 80 (1.75+T)°C is capped and fixed onto a base body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12597389A JPH02303547A (en) | 1989-05-18 | 1989-05-18 | Crushing tooth of sintered ore crushing machine and its production |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12597389A JPH02303547A (en) | 1989-05-18 | 1989-05-18 | Crushing tooth of sintered ore crushing machine and its production |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02303547A true JPH02303547A (en) | 1990-12-17 |
Family
ID=14923576
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12597389A Pending JPH02303547A (en) | 1989-05-18 | 1989-05-18 | Crushing tooth of sintered ore crushing machine and its production |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02303547A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105797814A (en) * | 2016-05-09 | 2016-07-27 | 沙洲职业工学院 | Bi-metal composite plate hammer for impact type ore crusher |
-
1989
- 1989-05-18 JP JP12597389A patent/JPH02303547A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105797814A (en) * | 2016-05-09 | 2016-07-27 | 沙洲职业工学院 | Bi-metal composite plate hammer for impact type ore crusher |
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