JPH09220528A - Screen component for raw material in iron and steel mill - Google Patents
Screen component for raw material in iron and steel millInfo
- Publication number
- JPH09220528A JPH09220528A JP8037257A JP3725796A JPH09220528A JP H09220528 A JPH09220528 A JP H09220528A JP 8037257 A JP8037257 A JP 8037257A JP 3725796 A JP3725796 A JP 3725796A JP H09220528 A JPH09220528 A JP H09220528A
- Authority
- JP
- Japan
- Prior art keywords
- sieve member
- raw material
- steel mill
- metal
- sprayed
- 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.)
- Withdrawn
Links
- 239000002994 raw material Substances 0.000 title claims abstract description 54
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 41
- 239000010959 steel Substances 0.000 title claims abstract description 40
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 10
- 238000005507 spraying Methods 0.000 claims abstract description 61
- 239000002184 metal Substances 0.000 claims abstract description 42
- 229910052751 metal Inorganic materials 0.000 claims abstract description 42
- 239000011195 cermet Substances 0.000 claims abstract description 34
- 239000000843 powder Substances 0.000 claims abstract description 33
- 239000000919 ceramic Substances 0.000 claims abstract description 14
- 238000002844 melting Methods 0.000 claims abstract description 13
- 230000008018 melting Effects 0.000 claims abstract description 12
- 238000010285 flame spraying Methods 0.000 claims description 36
- 238000000576 coating method Methods 0.000 claims description 31
- 239000011248 coating agent Substances 0.000 claims description 30
- 229910045601 alloy Inorganic materials 0.000 claims description 29
- 239000000956 alloy Substances 0.000 claims description 29
- 239000007921 spray Substances 0.000 claims description 14
- 229910052759 nickel Inorganic materials 0.000 claims description 10
- 239000011159 matrix material Substances 0.000 claims description 8
- 230000003746 surface roughness Effects 0.000 claims description 7
- 150000004767 nitrides Chemical class 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 2
- 244000126211 Hericium coralloides Species 0.000 claims 1
- 230000002950 deficient Effects 0.000 claims 1
- 239000006185 dispersion Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 23
- 238000007751 thermal spraying Methods 0.000 description 15
- 238000007873 sieving Methods 0.000 description 10
- 239000010410 layer Substances 0.000 description 7
- 239000000571 coke Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000002156 mixing Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000007750 plasma spraying Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 241001648319 Toronia toru Species 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Combined Means For Separation Of Solids (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、溶射によって表面
を硬くし、長期寿命を有する製鉄所原料用篩部材に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sieve member for a steel mill raw material, which has a hard surface by thermal spraying and has a long life.
【０００２】[0002]
【従来の技術】銑鉄原料の一つであるコークス等は、ス
テンレス板にパンチング加工によって多数の小孔を所定
ピッチで形成した篩い網（グリズリー下網）を用いて篩
われ、一定粒度以下の粉粒状物を除去して高炉原料とし
ている。ところが、前記振動用篩い網は、表面を流れる
コークスによってステンレス板が摩耗し、篩い目を構成
する小孔が拡大するので使用できなくなる。そこで、実
開平４−１０２６８１号公報に記載のように、篩い網本
体の表面に自溶性合金からなる溶射層、又は自溶性合金
１０重量％と残部炭化物とのサーメットからなる溶射層
を形成した二層構造打ち抜き金網が提案されている。BACKGROUND OF THE INVENTION Coke, which is one of the raw materials for pig iron, is a powder of a certain size or less, which is sieved using a sieving net (grizzly lower net) in which a large number of small holes are formed at a predetermined pitch by punching on a stainless steel plate. Granules are removed and used as blast furnace raw material. However, the vibrating screen cannot be used because the stainless plate is worn by the coke flowing on the surface and the small holes forming the screen are enlarged. Therefore, as described in Japanese Utility Model Laid-Open No. 4-102681, a sprayed layer made of a self-fluxing alloy or a sprayed layer made of cermet of 10% by weight of a self-fluxing alloy and the balance carbide is formed on the surface of a sieving net body. A layered punched wire mesh has been proposed.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前記公
報記載の二層構造打ち抜き金網においては、溶射材料と
しては、自溶性合金又は自溶性合金とサーメットを使用
しているが、溶射方法としては火炎速度の遅い通常の溶
射方法（サーモスプレイ粉末溶射方法）を使用している
ので、溶射層の密度が小さく、結果として溶射層溶融処
理を行う必要がある。従って、金網が歪み易く、後処理
に労力を要するという問題がある。また、前記方法にお
いては、前記したサーモスプレイ粉末溶射方法を使用し
ているので、例えば、表面側を耐摩耗性の高いセラミッ
クスの配分を大きくしようとする場合には、原料配分を
変えて溶射を複数回行う必要があり、極めて手間である
と共に、配合割合を任意に設定した最適な強度の溶射皮
膜を形成することが極めて困難であるという問題があ
る。なお、以上の問題は、素地の金属をそのまま露出さ
せて使用している高炉原料を篩うスクリーン、あるいは
その他の製鉄所で使用する篩い網においてサーモスプレ
イ粉末溶射方法を行えば、共通に生じる問題であった。
本発明はかかる事情に鑑みてなされたもので、溶射後に
溶融処理をしなくても十分な強度を有する溶射皮膜の形
成が可能で、製品の歪みが少なく長期の寿命を有する製
鉄所原料用篩部材を提供することを目的とする。However, in the two-layer structure punched wire net described in the above publication, a self-fluxing alloy or a self-fluxing alloy and cermet are used as the thermal spraying material. Since the conventional thermal spraying method (thermospray powder thermal spraying method) is used, the density of the thermal sprayed layer is low, and as a result, it is necessary to perform the thermal sprayed layer melting treatment. Therefore, there is a problem that the wire mesh is easily distorted and post-treatment requires labor. Further, in the method, since the thermospray powder thermal spraying method described above is used, for example, when increasing the distribution of ceramics with high wear resistance on the surface side, the thermal spraying is performed by changing the raw material distribution. There is a problem in that it needs to be performed a plurality of times, which is extremely troublesome, and it is extremely difficult to form a sprayed coating having an optimal strength with a blending ratio arbitrarily set. The above problems commonly occur when the thermospray powder spraying method is performed on a screen for sieving the blast furnace raw material that is used by exposing the base metal as it is, or a sieving net used in other steelworks. Met.
The present invention has been made in view of such circumstances, it is possible to form a sprayed coating having sufficient strength without performing a melting treatment after the spraying, the steel product raw material sieve with less distortion of the product and a long life It is intended to provide a member.
【０００４】[0004]
【課題を解決するための手段】前記目的に沿う請求項１
記載の製鉄所原料用篩部材は、分散強化型の硬質皮膜を
形成するサーメット微粉末を、高速火炎溶射にて含まれ
るセラミックスの融点以下でしかも含まれる金属分の融
点以上の温度に加熱して、篩い目を構成する多数の小孔
が形成され、更に表面には凹凸加工がなされた金属製篩
部材本体の表面に溶射して、溶射皮膜を形成し表面硬度
を７００Ｈｖ以上としている。ここで、高速火炎溶射と
は火炎（フレーム）の速度が通常の溶射に比較して３倍
以上の速さ（具体例としては、２０００〜２７００ｍ／
秒）を有する溶射をいう。また、請求項２記載の製鉄所
原料用篩部材は、請求項１記載の製鉄所原料用篩部材に
おいて、前記サーメット微粉末は、金属分が定量未満の
サーメット微粉末と、不足の金属分を含む自溶性合金粉
末とからなって、それぞれ独立の高速火炎溶射機によっ
て同時溶射されて、前記溶射皮膜が形成されている。請
求項３記載の製鉄所原料用篩部材は、請求項２記載の製
鉄所原料用篩部材において、前記溶射皮膜は傾斜配合さ
れて、表面側にセラミックスが多くなっている。請求項
４記載の製鉄所原料用篩部材は、請求項１〜３のいずれ
か１項に記載の製鉄所原料用篩部材において、前記金属
製篩部材本体は鉄板又は鉄合金板をパンチング加工及び
／又はエキスパンド加工によって、前記小孔が頂角が丸
くなった２等辺三角形、菱形又は櫛歯形で分級機能を有
する形状になって、しかも前記凹凸加工は、表面粗度Ｒ
ｚが５０〜１５０μｍの範囲にある。請求項５記載の製
鉄所原料用篩部材は、請求項１〜４のいずれか１項に記
載の製鉄所原料用篩部材において、前記溶射皮膜を形成
するサーメット微粉末は、ＷＣ、ＣｒＣ、ＴｉＣ及びＳ
ｉＣの群から選択される何れか一種以上と、Ｎｉ、Ｃ
ｒ、Ｃｏ及びこれらの合金の群から選択される何れか一
種以上とからなって炭化物を１０〜９０重量％、Ｎｉ、
Ｃｒ、Ｃｏ又はこれらの合金等の金属マトリックスを９
０〜１０重量％を含む炭化物系サーメット、酸化物を１
０〜９０重量％、Ｎｉ、Ｃｒ、Ｃｏ又はこれらの合金等
の金属マトリックスを９０〜１０重量％を含む酸化物系
サーメット、窒化物を１０〜９０重量％、Ｎｉ、Ｃｒ、
Ｃｏ又はこれらの合金等の金属マトリックスを９０〜１
０重量％を含む窒化物系サーメット、又は、硼化物を１
０〜９０重量％、Ｎｉ、Ｃｒ、Ｃｏ又はこれらの合金等
の金属マトリックスを９０〜１０重量％を含む硼化物系
サーメットの何れか一つからなっている。請求項６記載
の製鉄所原料用篩部材は、請求項１〜５のいずれか１項
に記載の製鉄所原料用篩部材において、前記金属製篩部
材本体の表面に形成された溶射皮膜の厚みが０．１〜２
ｍｍとなって、更に前記小孔の内面にも０．１〜１ｍｍ
の溶射皮膜が形成されている。そして、請求項７記載の
製鉄所原料用篩部材は、請求項１〜６記載の製鉄所原料
用篩部材において、前記高速火炎溶射は、溶射火炎速度
が２０００〜２７００ｍ／秒、火炎温度が２４００〜２
７００℃の条件で行っている。なお、以上の製鉄所原料
用篩部材において、溶射する微粉末の粒度は、１０μｍ
以下の場合には、製造価格が高騰すると共に、溶射に受
ける運動量が小さくなって気流に流され易くなり、５０
μｍを越えると溶射皮膜が粗くなって実質的強度が落ち
るので、１０〜５０μｍの範囲で選定するのが好まし
い。According to the present invention, there is provided a semiconductor device comprising:
The steel mill raw material sieve member described is a cermet fine powder that forms a dispersion-strengthened hard coating, and is heated to a temperature not lower than the melting point of the ceramics contained in high-speed flame spraying and still higher than the melting point of the contained metal components. A large number of small holes that form sieve openings are formed, and the surface of the metal sieve member main body having an uneven surface is sprayed to form a sprayed coating, and the surface hardness is 700 Hv or more. Here, the high-speed flame spraying means that the speed of the flame (frame) is three times or more as high as that of normal spraying (as a specific example, 2000 to 2700 m /
Second). The steel mill raw material sieve member according to claim 2 is the steel mill raw material sieve member according to claim 1, wherein the cermet fine powder includes cermet fine powder having a metal content of less than a fixed amount and insufficient metal content. The self-fluxing alloy powder contained therein is simultaneously sprayed by independent high-speed flame spraying machines to form the sprayed coating. A steel mill raw material sieve member according to a third aspect of the present invention is the steel mill raw material sieve member according to the second aspect, wherein the thermal spray coating is mixed in a gradient manner, and the surface side has a large amount of ceramics. The steel mill raw material sieve member according to claim 4 is the iron mill raw material sieve member according to any one of claims 1 to 3, wherein the metal sieve member body is formed by punching an iron plate or an iron alloy plate. / Or by expanding, the small hole becomes an isosceles triangle with rounded apex, a rhombus, or a comb-like shape having a classification function, and the unevenness has a surface roughness R
z is in the range of 50 to 150 μm. The steel mill raw material sieve member according to claim 5 is the steel mill raw material sieve member according to any one of claims 1 to 4, wherein the cermet fine powder forming the thermal spray coating is WC, CrC, or TiC. And S
Any one or more selected from the group of iC and Ni, C
r, Co, and any one or more selected from the group of these alloys, containing 10 to 90% by weight of carbide, Ni,
A metal matrix such as Cr, Co or an alloy thereof
Carbide-based cermet containing 0 to 10% by weight, 1 of oxide
0 to 90% by weight, oxide-based cermet containing 90 to 10% by weight of metal matrix such as Ni, Cr, Co or alloys thereof, 10 to 90% by weight of nitride, Ni, Cr,
A metal matrix such as Co or an alloy thereof is 90-1.
Nitride-based cermet containing 0% by weight or 1 boride
It is made of any one of boride-based cermets containing 0 to 90% by weight and 90 to 10% by weight of a metal matrix such as Ni, Cr, Co or alloys thereof. The steel mill raw material sieve member according to claim 6 is the steel mill raw material sieve member according to any one of claims 1 to 5, wherein the thickness of the sprayed coating formed on the surface of the metal sieve member main body. Is 0.1-2
mm, and 0.1 to 1 mm on the inner surface of the small hole.
The thermal sprayed coating of is formed. And the steel mill raw material sieve member according to claim 7 is the ironworks raw material sieve member according to claims 1 to 6, wherein the high-speed flame spraying has a spray flame velocity of 2000 to 2700 m / sec and a flame temperature of 2400. ~ 2
It is performed under the condition of 700 ° C. In the above steel mill raw material sieve member, the particle size of the fine powder to be sprayed is 10 μm.
In the following cases, the manufacturing price rises and the momentum of thermal spraying becomes small, and it becomes easy for the air to flow.
If the thickness exceeds μm, the thermal spray coating becomes rough and the strength is substantially reduced. Therefore, it is preferable to select in the range of 10 to 50 μm.
【０００５】[0005]
【作用】請求項１〜７記載の製鉄所原料用篩部材におい
ては、金属製篩部材本体の表面にサーメット微粉末を、
高速火炎溶射によって溶射しているので、形成される溶
射皮膜が緻密になって、溶融処理の必要がない。従っ
て、金属製篩部材本体に加わる熱が減少し、これによっ
て製品の歪みが少ない。即ち、高速火炎溶射におけるフ
レーム速度は、前述のように、例えば、２０００〜２７
００ｍ／秒と、通常の火炎溶射（約３００ｍ／秒）やプ
ラズマ溶射（約８００ｍ／秒）に比較して大きく、しか
も金属製篩部材本体の表面には、適当な凹凸加工がなさ
れているので、溶射皮膜の付着が良く、結果として溶射
皮膜の脱落の生じ難い製鉄所原料用篩部材となる。In the steel mill raw material sieve member according to any one of claims 1 to 7, cermet fine powder is provided on the surface of the metal sieve member body.
Since it is sprayed by high-speed flame spraying, the sprayed coating formed is dense and there is no need for melting treatment. Therefore, the heat applied to the metal sieve member main body is reduced, so that the product is less distorted. That is, the flame velocity in high-speed flame spraying is, for example, 2000 to 27 as described above.
00 m / sec, which is larger than ordinary flame spraying (about 300 m / sec) or plasma spraying (about 800 m / sec), and the surface of the metal sieve member body is appropriately roughened. As a result, the sieve member for a steel mill raw material has good adhesion of the thermal spray coating, and as a result, the thermal spray coating does not easily come off.
【０００６】特に、請求項２記載の製鉄所原料用篩部材
においては、前記サーメット微粉末が、金属分が定量未
満のサーメット微粉末と、不足の金属分を含む自溶性合
金粉末からなって、それぞれ独立の高速火炎溶射機によ
って同時溶射されているので、供給する配合を交換する
ことなく、最も適正な配合割合の溶射皮膜を形成するこ
とが容易である。従って、請求項３記載の製鉄所原料用
篩部材のように、それぞれの高速火炎溶射機から溶射さ
れる溶射材料の溶射量を独立に変えて、傾斜組成の溶射
皮膜を形成でき、これによって、溶射皮膜の表面側を耐
摩耗性に強いセラミックスの量を増加させ、金属製篩部
材本体の接合側に金属に馴染みの良い自溶性合金の割合
を増加することができる。Particularly, in the sieve member for iron mill raw material according to claim 2, the cermet fine powder is composed of cermet fine powder having a metal content less than a fixed amount and self-fluxing alloy powder containing an insufficient metal content. Since they are simultaneously sprayed by independent high-speed flame sprayers, it is easy to form the sprayed coating with the most appropriate blending ratio without changing the blending composition to be supplied. Therefore, like the steel mill raw material sieve member according to claim 3, the sprayed amount of the sprayed material sprayed from each high-speed flame spraying machine can be changed independently to form a sprayed coating having a gradient composition. It is possible to increase the amount of ceramics having high abrasion resistance on the surface side of the thermal spray coating and increase the proportion of self-fluxing alloy that is well compatible with metals on the joining side of the metal sieve member body.
【０００７】請求項４記載の製鉄所原料用篩部材におい
ては、表面粗度Ｒｚが５０〜１５０μｍの範囲にある凹
凸加工がなされているので、溶射皮膜の付着性が良く、
強固な溶射皮膜を形成できる。ここで、表面粗度Ｒｚを
５０μｍ未満とすると、表面が滑らか過ぎて溶射皮膜の
密着力が１０ｋｇ／ｃｍ2 以下と小さくなり、表面粗度
Ｒｚが１５０μｍを越えると、溶射皮膜のバラツキが大
きくなるという欠点がある。請求項５記載の製鉄所原料
用篩部材においては、溶射皮膜を形成するサーメット微
粉末が、上記の構成となって、これらの材料を高速火炎
溶射するので、内部に未溶融のセラミックスの骨材を含
む溶射皮膜が形成され、硬度を有する溶射皮膜となる。
ここで、一方の成分に対し、他方の成分を１０〜９０重
量％としたのは、自溶性合金が１０％未満であれば、セ
ラミックスの接合性が悪くなり、９０％を越えると自溶
性合金内の骨材が不足し、十分な強度を得られないから
である。In the steel mill raw material sieve member according to claim 4, since the surface roughness Rz is roughened in the range of 50 to 150 μm, the adhesion of the thermal spray coating is good,
A strong thermal spray coating can be formed. Here, if the surface roughness Rz is less than 50 μm, the surface becomes too smooth and the adhesion of the thermal spray coating becomes less than 10 kg / cm 2 , and if the surface roughness Rz exceeds 150 μm, the dispersion of the thermal spray coating increases. There is a drawback that. In the steel mill raw material sieve member according to claim 5, since the cermet fine powder forming the sprayed coating has the above-mentioned configuration and performs high-speed flame spraying of these materials, an unmelted ceramic aggregate is formed inside. A thermal sprayed coating containing is formed to provide a thermal sprayed coating having hardness.
Here, the reason why the content of the other component is 10 to 90% by weight relative to one component is that if the self-fluxing alloy is less than 10%, the bondability of the ceramics deteriorates, and if it exceeds 90%, the self-fluxing alloy is used. This is because the internal aggregate is insufficient and sufficient strength cannot be obtained.
【０００８】そして、請求項６記載の製鉄所原料用篩部
材においては、金属製篩部材本体の表面に形成された溶
射皮膜の厚みが０．１〜２ｍｍとなっているが、これ
は、溶射皮膜の厚みを０．１ｍｍ未満とした場合には、
溶射皮膜の厚みが薄すぎて寿命が短かく、２ｍｍを越え
ると、溶射皮膜の剥離が生じ易いからである。また、小
孔の内面にも０．１〜１ｍｍの溶射皮膜が形成されてい
るので、原料が小孔を通じて流れる場合にも原料の流れ
によって小孔が拡大され難いという利点がある。ここ
で、小孔の内側に形成される溶射皮膜の厚みを０．１ｍ
ｍ未満とすると、寿命が短く１ｍｍを越えると流れる原
料の押圧力によって溶射皮膜が脱落する恐れがあるから
である。更に、請求項７記載の製鉄所原料用篩部材にお
いて、２４００〜２７００℃の火炎によって加熱された
サーメット微粉末のうち金属分は溶解するが、セラミッ
クスは全部が溶けないうちに溶射皮膜が形成される。従
って、セラミックスが骨材となった溶射皮膜となり、更
に高速度で溶射されることもあって、従来の火炎溶射及
びプラズマ溶射に比較して密度が高くて強度を有する溶
射皮膜となって耐摩耗性が向上する。そして、その溶射
火炎温度が２４００℃未満であっては、溶射材料を形成
する溶射材料の溶融が悪く、半溶融と溶融との混合され
た溶射被膜の形成が困難であり、しかも溶射被膜層の均
質性が阻害される。一方、溶射火炎温度が２７００℃を
越えると、溶射材料が溶け過ぎとなって、冷却で発生す
る応力に耐える難剥離性の被膜とならないし、更には形
成被膜の均一性が阻害される。また、溶射速度が２００
０ｍ／秒未満では材料に与える運動量が不足して緻密な
溶射被膜を形成できず、溶射速度が２７００ｍ／秒を越
えると溶射材料の加熱時間が不足して半溶融と溶融が適
度に混合された溶射被膜の形成ができない。従って、溶
射速度と溶射火炎温度を前記のように最適範囲とするこ
とで、半溶融と溶融との混合した材料による強固でしか
も難剥離性の溶射被膜を形成できる。Further, in the steel mill raw material sieve member according to claim 6, the thickness of the sprayed coating formed on the surface of the metal sieve member body is 0.1 to 2 mm. When the thickness of the film is less than 0.1 mm,
This is because the thickness of the thermal spray coating is too thin and the life is short, and when it exceeds 2 mm, peeling of the thermal spray coating easily occurs. Further, since the sprayed coating of 0.1 to 1 mm is formed on the inner surface of each small hole, there is an advantage that even when the raw material flows through the small hole, the small hole is not easily expanded by the flow of the raw material. Here, the thickness of the thermal spray coating formed inside the small holes is 0.1 m.
If it is less than m, the life is short and if it exceeds 1 mm, the thermal spray coating may fall off due to the pressing force of the flowing raw material. Further, in the steel mill raw material sieve member according to claim 7, the metal content of the cermet fine powder heated by a flame of 2400 to 2700 ° C. is dissolved, but the ceramics forms a sprayed coating before the whole is melted. It Therefore, the ceramics become a sprayed coating that becomes an aggregate, and because it is sprayed at a higher speed, it becomes a sprayed coating that has a higher density and strength than conventional flame spraying and plasma spraying, and has abrasion resistance. The performance is improved. When the thermal spray flame temperature is lower than 2400 ° C., the thermal spray material forming the thermal spray material is poorly melted, and it is difficult to form a thermal spray coating in which semi-molten and molten are mixed. Homogeneity is impaired. On the other hand, when the thermal spray flame temperature exceeds 2700 ° C., the thermal spray material is excessively melted, and the film does not easily peel off to withstand the stress generated by cooling, and further the uniformity of the formed film is impaired. Also, the spraying speed is 200
If it is less than 0 m / sec, the momentum given to the material is insufficient to form a dense sprayed coating, and if the spraying speed exceeds 2700 m / sec, the heating time of the sprayed material is insufficient and the semi-melting and the melting are appropriately mixed. The sprayed coating cannot be formed. Therefore, by setting the thermal spraying speed and the thermal spray flame temperature in the optimum ranges as described above, it is possible to form a strong and hardly peelable thermal spray coating made of a mixed material of semi-molten and molten.
【０００９】[0009]
【発明の効果】従って、請求項１〜７記載の製鉄所原料
用篩部材は、高速火炎溶射によって表面に硬質で緻密な
溶射皮膜が形成されているので、製鉄所原料用篩部材の
寿命が延長されることは当然として、従来のように溶射
皮膜の溶融処理をする必要がないので、製品の歪みが少
なく、加熱や歪み取り作業が省略されて、安価な製鉄所
原料用篩部材を製造できる。特に、請求項２記載の製鉄
所原料用篩部材においては、上記効果に加えて、高速火
炎溶射機に供給する溶射材料を任意に設定でき、適正な
配合の溶射皮膜を安価に形成できるという利点がある。As described above, since the sieve member for raw material for ironworks according to claims 1 to 7 has a hard and dense thermal spray coating formed on the surface by high-speed flame spraying, the life of the sieve member for raw material for ironworks is long. Needless to say that it is extended, there is no need to perform the melting treatment of the sprayed coating as in the past, so there is little distortion of the product, heating and strain relief work are omitted, and an inexpensive sieve member for steel mill raw materials is manufactured. it can. In particular, in the steel mill raw material sieve member according to claim 2, in addition to the above-mentioned effects, the thermal spray material to be supplied to the high-speed flame spraying machine can be arbitrarily set, and a thermal spray coating having an appropriate composition can be formed at low cost. There is.
【００１０】請求項３記載の製鉄所原料用篩部材におい
ては、溶射皮膜を傾斜配合して、表面側にセラミックス
の配合を多くしているので、表面硬度を更に向上させる
ことができると共に、金属製篩部材本体側に自溶性合金
を多くして接合性を強固にすることができる。更に、請
求項６記載の製鉄所原料用篩部材においては、小孔の内
側にも溶射皮膜が形成されているので、原料篩い時の摩
耗にも強く長期の寿命を有するという利点がある。In the sieve member for steel mill raw material according to the third aspect, since the spray coating is inclined and compounded to increase the ceramic content on the surface side, the surface hardness can be further improved and the metal can be improved. The self-fluxing alloy can be increased on the side of the sieve member body to strengthen the bondability. Furthermore, in the steel mill raw material sieve member according to the sixth aspect, since the thermal spray coating is formed inside the small holes, there is an advantage that it is resistant to wear during raw material sieving and has a long life.
【００１１】[0011]
【発明の実施の形態】続いて、添付した図面を参照しつ
つ、本発明を具体化した実施の形態につき説明し、本発
明の理解に供する。ここに、図１は本発明の一実施の形
態に係る製鉄所原料用篩部材の平面図、図２は同正面
図、図３は同部分断面図、図４（Ａ）、（Ｂ）は溶射状
況の説明図である。BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to the attached drawings, an embodiment in which the present invention is embodied will be described to provide an understanding of the present invention. Here, FIG. 1 is a plan view of a sieve member for a steel mill raw material according to an embodiment of the present invention, FIG. 2 is a front view thereof, FIG. 3 is a partial sectional view thereof, and FIGS. 4 (A) and 4 (B) are It is an explanatory view of a thermal spraying situation.
【００１２】図１、図２に示すように、本発明の一実施
の形態に係る製鉄所原料用篩部材１０は、製鉄原料とし
て使用するコークスの篩い網に本発明を適用したもので
あって、平面視して長方形の金属製篩部材本体１１を有
し、その両側には取付け孔１２を、底部には補強の複数
のリブ１３が格子状に組まれている。前記金属製篩部材
本体１１は厚みが６ｍｍ程度のステンレス（ＳＵＳ３０
４）又は鉄板（ＳＳ４１）からなって、多数の小孔１４
がパンチング加工によって形成されている。小孔１４は
流れ方向に４５ｍｍ、流れと直交する方向に４０ｍｍの
ピッチで千鳥足状に形成され、頂部が丸くなって流れ方
向に徐々に拡幅する略二等辺三角形となっている。な
お、小孔１４の上下方向の長さは３５ｍｍ程度、底辺の
幅は３０ｍｍ程度となって、図３に示すように母材１５
の表面側に溶射皮膜１６が形成されている。As shown in FIGS. 1 and 2, an iron mill raw material sieve member 10 according to an embodiment of the present invention is obtained by applying the present invention to a coke sieving net used as an ironmaking raw material. It has a rectangular metal sieve member main body 11 in a plan view, mounting holes 12 are formed on both sides of the metal sieve member main body 11, and a plurality of reinforcing ribs 13 are assembled in a lattice pattern on the bottom. The metal sieve member body 11 is made of stainless steel (SUS30 having a thickness of about 6 mm).
4) or an iron plate (SS41), with many small holes 14
Are formed by punching. The small holes 14 are formed in a zigzag shape with a pitch of 45 mm in the flow direction and a pitch of 40 mm in the direction orthogonal to the flow, and have a substantially rounded top and a substantially isosceles triangle gradually widening in the flow direction. The small hole 14 has a vertical length of about 35 mm and a bottom width of about 30 mm. As shown in FIG.
A thermal spray coating 16 is formed on the surface side of the.
【００１３】以下、まず溶射皮膜１６の形成方法につい
て説明する。有機溶剤を用いて金属製篩部材本体１１の
脱脂を行うと共に、ブラスト処理によって凹凸加工がな
され、表面粗度Ｒｚを７０〜８０μｍ程度にするが、表
面粗度Ｒｚは５０〜１５０μｍの範囲で選択することが
できる。この場合のブラスト材（グリッド）の種類はア
ルミナ、スチール、サンド等があるが投錨効果を大きく
するためには、アルミナが最もよい。次に、凹凸加工が
なされた金属製篩部材本体１１の表面には、図４（Ａ）
に示すように、母材１５の表面にサーメット微粉末を高
速火炎溶射機１７を用いて溶射皮膜１６を形成する。こ
の場合の、サーメット微粉末の材料としては、例えば、
粒度が１０〜５０μｍ（好ましくは、１５〜４４μｍ）
のＷＣ−１２Ｃｏの複合粉を使用するのが好ましいが、
その他の炭化物系サーメット（例えば、ＣｒＣ、Ｔｉ
Ｃ、ＳｉＣの何れか一種以上と、Ｎｉ、Ｃｒ、Ｃｏ又は
これらの合金からなる自溶性合金の複合粉、酸化物系サ
ーメット、窒化物系サーメット、硼化物系サーメット等
も使用できる。なお、この場合、溶射皮膜の硬度がＨｖ
７００以上であることを条件とする。また、更なる寿命
を必要とする場合には、溶射皮膜の強度をＨｖ１１００
以上とすることが好ましく、溶射材料として均一に混合
されたＷＣ−１２Ｃｏの複合粉を用いれば容易に達成で
きる。First, a method for forming the thermal spray coating 16 will be described below. The metal sieve member main body 11 is degreased using an organic solvent, and unevenness processing is performed by blasting to make the surface roughness Rz about 70 to 80 μm, but the surface roughness Rz is selected in the range of 50 to 150 μm. can do. In this case, the type of blast material (grid) includes alumina, steel, sand, etc., but alumina is the best in order to increase the anchoring effect. Next, as shown in FIG.
As shown in FIG. 2, a cermet fine powder is formed on the surface of the base material 15 by using a high-speed flame spraying machine 17 to form a sprayed coating 16. In this case, as the material of the cermet fine powder, for example,
Particle size is 10 to 50 μm (preferably 15 to 44 μm)
It is preferable to use the composite powder of WC-12Co of
Other carbide-based cermets (eg CrC, Ti
It is also possible to use a composite powder of any one or more of C and SiC and a self-fluxing alloy made of Ni, Cr, Co or an alloy thereof, an oxide cermet, a nitride cermet, a boride cermet and the like. In this case, the hardness of the thermal spray coating is Hv
The condition is 700 or more. If a longer life is required, the strength of the thermal spray coating should be Hv1100.
The above is preferable, and it can be easily achieved by using a uniformly mixed WC-12Co composite powder as the thermal spray material.
【００１４】前記高速火炎溶射は、灯油（ケロシン）を
燃料とし、酸素を用いて化合させて２４００〜２７００
℃の高温で、２５００〜２７００ｍ／秒の高速ガスジェ
ットを作り、これにサーメット微粉末を乗せて溶融さ
せ、高速度で（例えば、約７５０ｍ／秒）溶射材料を金
属製篩部材本体１１の上に吹き付けて凝固させて接合す
るものである。この場合、図４（Ａ）に示すように一台
の高速火炎溶射機１７を用いてもよいが、図４（Ｂ）に
示すように、２台の高速火炎溶射機１８、１９を用いて
高速火炎溶射するのが好ましい。即ち、一方の高速火炎
溶射機１８にサーメット微粉末（又はセラミックスの
み）を供給し、他方の高速火炎溶射機１９に自溶性合金
を供給して、これらを均等に混合して溶射皮膜を形成す
れば、効率的により強固な溶射皮膜を形成できる。これ
は、サーメット微粉末（又はセラミックス）と自溶性合
金とでは溶射条件が異なり、独立に高速火炎溶射機１
８、１９を選択することによって最適条件、例えば、溶
射距離Ｌ1 、Ｌ2 、溶射角度θ1、θ2 を任意に変えて
溶射ができること、及び２台の高速火炎溶射機１８、１
９の溶射材料の割合を任意に変えて最適な配合の溶射皮
膜とすることができ、場合によっては溶射皮膜を傾斜配
合させて傾斜機能材料とすることもできるからである。
この場合の溶射角度θ1 、θ2 は９０度に近い相互のト
ーチが干渉しない角度が好ましく、実質的には７０〜８
０度の範囲である。In the high-speed flame spraying, kerosene (kerosene) is used as a fuel, and oxygen is used to combine 2400 to 2700.
A high-speed gas jet of 2500 to 2700 m / sec is produced at a high temperature of ℃, and cermet fine powder is placed on the jet to melt it, and the thermal spray material is applied at a high speed (for example, about 750 m / sec) onto the metal sieve member main body 11. It is sprayed onto and solidified to join. In this case, one high speed flame spraying machine 17 may be used as shown in FIG. 4 (A), but two high speed flame sprayers 18 and 19 may be used as shown in FIG. 4 (B). High speed flame spraying is preferred. That is, cermet fine powder (or only ceramics) is supplied to one high-speed flame spraying machine 18, a self-fluxing alloy is supplied to the other high-speed flame spraying machine 19, and these are evenly mixed to form a sprayed coating. If so, a stronger and more sprayed coating can be efficiently formed. This is because the cermet fine powder (or ceramics) and the self-fluxing alloy have different spraying conditions, and the high-speed flame spraying machine 1 is independent.
By selecting 8 and 19, optimum conditions, for example, spraying distances L 1 and L 2 , and spraying angles θ 1 and θ 2 can be arbitrarily changed, and two high-speed flame sprayers 18 and 1 can be sprayed.
This is because it is possible to arbitrarily change the ratio of the thermal spray material of No. 9 to obtain the thermal spray coating having the optimum composition, and in some cases, to perform the gradient mixing of the thermal spray coating to obtain the functionally gradient material.
In this case, the spraying angles θ 1 and θ 2 are preferably angles close to 90 degrees at which mutual torches do not interfere, and substantially 70 to 8 degrees.
The range is 0 degrees.
【００１５】ここで、金属製篩部材本体１１の表面のみ
に溶射する場合には、金属製篩部材本体１１の面に略直
角に前記高速ガスジェットを向けて行えばよいが、図１
の拡大図に示すように、小孔１４の底辺２０の内側に溶
射する場合には、溶射ガンを斜めに向けて、できるだけ
底辺２０の内壁にサーメット微粉末が付着するようにし
て行う。勿論、小孔１４の両側の斜辺２１の内壁にもサ
ーメット微粉末を溶射することは可能であるが、この部
分は原料が直接衝突しないので、表面から小孔１４の上
端角の部分を溶射することのみでも十分である。前記実
施の形態は、コークスの篩い網に本発明を適用した実施
の形態を示すが、例えば、高炉原料の篩い網等、その他
鉄を生産する際に使用する篩い網に本発明を適用でき
る。Here, in the case of spraying only the surface of the metallic sieve member main body 11, the high-speed gas jet may be directed substantially at right angles to the surface of the metallic sieve member main body 11.
As shown in the enlarged view of FIG. 3, when spraying inside the bottom side 20 of the small hole 14, the spray gun is directed obliquely so that the cermet fine powder adheres to the inner wall of the bottom side 20 as much as possible. Of course, it is possible to spray the cermet fine powder onto the inner walls of the hypotenuse 21 on both sides of the small hole 14, but since the raw material does not directly collide with this portion, the upper corner of the small hole 14 is sprayed from the surface. That is enough. The above embodiment shows an embodiment in which the present invention is applied to a coke sieving net. For example, the present invention can be applied to a sieving net used as a blast furnace raw material and other sieving nets used for producing iron.
【００１６】[0016]
【実施例】次に、図４に示すような高速火炎溶射機１７
〜１９を用い、溶射条件を変えてコークスの篩い網に使
用する金属製篩部材本体１１の上に、溶射した場合実施
例１〜５の溶射皮膜の各性状を表１に示す。実施例１に
おいては、溶射ノズル８インチの高速火炎溶射機１７を
使用し、溶射材料として粒度が１０〜５０μｍ（以下の
実施例も同様）のＷＣ−１２Ｃｏの複合粉を使用し、溶
射距離Ｌ0 を２５０ｍｍとした。実施例２においては、
溶射ノズル４インチの高速火炎溶射機１８と溶射ノズル
８インチの高速火炎溶射機１９を使用し、高速火炎溶射
機１８からは自溶性合金を、高速火炎溶射機１９からは
ＷＣ−１２Ｃｏを３対７の割合で溶射して金属製篩部材
本体１１の表面に溶射皮膜を形成した。この場合、高速
火炎溶射機１８の溶射距離Ｌ1 は３５０ｍｍ、高速火炎
溶射機１９の溶射距離Ｌ2 は２５０ｍｍであった。EXAMPLE Next, a high speed flame spraying machine 17 as shown in FIG.
Table 1 shows each property of the sprayed coatings of Examples 1 to 5 when sprayed on the metal sieve member main body 11 used for the coke sieving net by changing the spraying conditions by using Nos. 19 to 19. In Example 1, a high-speed flame spraying machine 17 having a spraying nozzle of 8 inches was used, and a composite powder of WC-12Co having a particle size of 10 to 50 μm (same in the following Examples) was used as a spraying material, and a spraying distance L 0 was set to 250 mm. In Example 2,
A high-speed flame spraying machine 18 having a 4-inch spraying nozzle and a high-speed flame spraying machine 19 having a 8-inch spraying nozzle are used. From the high-speed flame spraying machine 18, a self-fluxing alloy, and from the high-speed flame spraying machine 19, 3 pairs of WC-12Co are used. Thermal spraying was performed at a ratio of 7 to form a thermal spray coating on the surface of the metal screen member body 11. In this case, the spraying distance L 1 of the high speed flame spraying machine 18 was 350 mm, and the spraying distance L 2 of the high speed flame spraying machine 19 was 250 mm.
【００１７】実施例３においては、溶射ノズル４インチ
の高速火炎溶射機１８と溶射ノズル８インチの高速火炎
溶射機１９を使用し、高速火炎溶射機１８からは自溶性
合金を、高速火炎溶射機１９からはＳｉＣ−４０Ｃｏを
２対８の割合で溶射して金属製篩部材本体１１の表面に
溶射皮膜を形成した。この場合、高速火炎溶射機１８の
溶射距離Ｌ1 は３５０ｍｍ、高速火炎溶射機１９の溶射
距離Ｌ2 は２５０ｍｍであった。実施例４においては、
実施例２の条件で供給する材料の傾斜配合を行い、金属
製篩部材本体１１に接する層においては、高速火炎溶射
機１８から溶射される自溶性合金と、高速火炎溶射機１
９から溶射されるＷＣ−１２Ｃｏを９対１の割合で溶射
して、徐々に割合を変えて５層の溶射を行い、表面層で
は、高速火炎溶射機１８から溶射される自溶性合金と、
高速火炎溶射機１９から溶射されるＷＣ−１２Ｃｏとの
割合を１対９とした。また、実施例５においては、前記
実施例１の条件で、高速火炎溶射機１７のトーチを約６
０度の角度に傾斜して、小孔１４の斜辺２１と底辺２０
の内側にも０．５ｍｍ厚みで溶射を行った。In the third embodiment, a high-speed flame spraying machine 18 having a spraying nozzle of 4 inches and a high-speed flame spraying machine 19 having a spraying nozzle of 8 inches are used. From the high-speed flame spraying machine 18, a self-fluxing alloy and a high-speed flame spraying machine are used. From No. 19, SiC-40Co was sprayed at a ratio of 2 to 8 to form a sprayed coating on the surface of the metal sieve member main body 11. In this case, the spraying distance L 1 of the high speed flame spraying machine 18 was 350 mm, and the spraying distance L 2 of the high speed flame spraying machine 19 was 250 mm. In Example 4,
Gradient blending of the materials supplied under the conditions of Example 2 was performed, and in the layer in contact with the metal sieve member body 11, the self-fluxing alloy sprayed from the high-speed flame sprayer 18 and the high-speed flame sprayer 1
WC-12Co sprayed from 9 is sprayed at a ratio of 9 to 1, and sprayed in 5 layers by gradually changing the ratio. In the surface layer, a self-fluxing alloy sprayed from the high-speed flame sprayer 18 and
The ratio of WC-12Co sprayed from the high-speed flame sprayer 19 was set to 1: 9. Further, in the fifth embodiment, the torch of the high speed flame spraying machine 17 is set to about 6 under the conditions of the first embodiment.
The slanted side 21 and the bottom side 20 of the small hole 14 are inclined at an angle of 0 degree.
Thermal spraying was also performed on the inner side of the substrate with a thickness of 0.5 mm.
【００１８】[0018]
【表１】 [Table 1]
【００１９】表１からも明らかなように、実施例１〜５
の製鉄所原料用篩部材においては、溶射後、サーメット
の溶融処理をすることなく、十分な硬度の溶射皮膜を形
成できることが分かる。従って、従来の製鉄所原料用篩
部材に比較して溶射処理によって製作された製鉄所原料
用篩部材の方が耐用年数が著しく増加することになる。
また、別の前記実施例１〜５の溶射方法と同一の条件
で、溶射皮膜を０．８ｍｍ、１．２ｍｍ、１．６ｍｍと
すると更に耐用性が向上できたが、更に厚くして２ｍｍ
を越えると溶射皮膜の剥離が生じ易いという欠点が生じ
た。なお、この実施の形態及び実施例においては、コー
クスの篩い網について説明したが、製鉄所で使用する他
の製鉄所原料用篩部材についても本発明を適用できる。As is clear from Table 1, Examples 1 to 5
It can be seen that in the steel mill raw material sieve member of No. 3, after the thermal spraying, a thermal spray coating having a sufficient hardness can be formed without performing the melting treatment of the cermet. Therefore, the service life of the steel mill material sieve member manufactured by the thermal spraying treatment is significantly increased as compared with the conventional steel mill material sieve member.
Also, under the same conditions as the other thermal spraying methods of Examples 1 to 5, when the thermal sprayed coating was 0.8 mm, 1.2 mm, and 1.6 mm, the durability was further improved, but the thickness was further increased to 2 mm.
If it exceeds, there is a drawback that the thermal spray coating is likely to peel off. In addition, although the sieve mesh of the coke has been described in the embodiment and the example, the present invention can be applied to other steel mill material sieve members used in the iron mill.
【図１】本発明の一実施の形態に係る製鉄所原料用篩部
材の平面図である。FIG. 1 is a plan view of a steel mill raw material sieve member according to an embodiment of the present invention.
【図２】同正面図である。FIG. 2 is a front view of the same.
【図３】溶射皮膜の部分断面図である。FIG. 3 is a partial cross-sectional view of a thermal spray coating.
【図４】溶射状況の説明図である。FIG. 4 is an explanatory diagram of a thermal spraying situation.
１０ 製鉄所原料用篩部材 １１ 金属製篩
部材本体 １２ 取付け孔 １３ リブ １４ 小孔 １５ 母材 １６ 溶射皮膜 １７ 高速火炎
溶射機 １８ 高速火炎溶射機 １９ 高速火炎
溶射機 ２０ 底辺 ２１ 斜辺10 Steel Mill Raw Material Sieve Member 11 Metal Sieve Member Main Body 12 Mounting Hole 13 Rib 14 Small Hole 15 Base Material 16 Thermal Spray Coating 17 High Speed Flame Sprayer 18 High Speed Flame Sprayer 19 High Speed Flame Sprayer 20 Bottom 21 Hypotenuse
───────────────────────────────────────────────────── フロントページの続き (72)発明者 谷口 博志 福岡県北九州市戸畑区飛幡町１番１号 新 日本製鐵株式会社八幡製鐵所内 (72)発明者 竜口 得 福岡県北九州市小倉南区新曽根５番１号 三島光産株式会社機工事業本部内 (72)発明者 梅山 祐登 福岡県北九州市小倉南区新曽根５番１号 三島光産株式会社機工事業本部内 (72)発明者 山本 圭祐 福岡県北九州市小倉南区新曽根５番１号 三島光産株式会社機工事業本部内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Taniguchi 1-1 Hibahata-cho, Tobata-ku, Kitakyushu, Kitakyushu, Fukuoka Inside the Nippon Steel Co., Ltd. Yawata Works (72) Inventor Ryuguchi Toru Kokuraminami-ku, Kitakyushu, Fukuoka Shinsone No. 5-1 Mishima Kosan Co., Ltd. Machining Business Headquarters (72) Inventor Yuto Umeyama 5-5, Shinsone Kozonami-ku, Kitakyushu City, Fukuoka Prefecture Mishima Kosan Co., Ltd. Machining Business Headquarters (72) Inventor Keisuke Yamamoto 5-1 Shinsone, Ogura Minami-ku, Kitakyushu, Fukuoka Prefecture Mishima Kosan Co., Ltd.
Claims (7)
ット微粉末を、高速火炎溶射にて含まれるセラミックス
の融点以下でしかも含まれる金属分の融点以上の温度に
加熱して、篩い目を構成する多数の小孔が形成され、更
に表面には凹凸加工がなされた金属製篩部材本体の表面
に溶射して、溶射皮膜を形成し表面硬度を７００Ｈｖ以
上としたことを特徴とする製鉄所原料用篩部材。1. A sieve mesh is formed by heating fine cermet powder for forming a dispersion-strengthened hard coating to a temperature not higher than the melting point of ceramics contained in high-speed flame spraying and not lower than the melting point of metal components contained therein. Steel mill raw material characterized in that a large number of small holes are formed, and the surface of the metal sieve member main body having an uneven surface is sprayed to form a sprayed coating and the surface hardness is 700 Hv or more. Sieve member.
未満のサーメット微粉末と、不足の金属分を含む自溶性
合金粉末とからなって、それぞれ独立の高速火炎溶射機
によって同時溶射されて、前記溶射皮膜が形成されてい
る請求項１記載の製鉄所原料用篩部材。2. The cermet fine powder is composed of a cermet fine powder having a metal content of less than a fixed amount and a self-fluxing alloy powder containing a deficient metal content, which are simultaneously sprayed by independent high-speed flame sprayers, The steel mill raw material sieve member according to claim 1, wherein the thermal spray coating is formed.
にセラミックスが多くなっている請求項２記載の製鉄所
原料用篩部材。3. The sieve member for a steel mill raw material according to claim 2, wherein the thermal spray coating is blended in an inclined manner and has a large amount of ceramics on the surface side.
板をパンチング加工及び／又はエキスパンド加工によっ
て、前記小孔が頂角が丸くなった２等辺三角形、菱形又
は櫛歯形で分級機能を有する形状になって、しかも前記
凹凸加工は、表面粗度Ｒｚが５０〜１５０μｍの範囲に
ある請求項１〜３のいずれか１項に記載の製鉄所原料用
篩部材。4. The metal sieve member main body has an isosceles triangle, a rhombus or a comb tooth shape in which the small holes have rounded apex angles, and has a classification function by punching and / or expanding an iron plate or an iron alloy plate. The steel mill raw material sieve member according to any one of claims 1 to 3, wherein the sieve member has a shape and the unevenness processing has a surface roughness Rz in a range of 50 to 150 µm.
末は、 ＷＣ、ＣｒＣ、ＴｉＣ及びＳｉＣの群から選択される何
れか一種以上と、Ｎｉ、Ｃｒ、Ｃｏ及びこれらの合金の
群から選択される何れか一種以上とからなって炭化物を
１０〜９０重量％、Ｎｉ、Ｃｒ、Ｃｏ又はこれらの合金
等の金属マトリックスを９０〜１０重量％を含む炭化物
系サーメット、 酸化物を１０〜９０重量％、Ｎｉ、Ｃｒ、Ｃｏ又はこれ
らの合金等の金属マトリックスを９０〜１０重量％を含
む酸化物系サーメット、 窒化物を１０〜９０重量％、Ｎｉ、Ｃｒ、Ｃｏ又はこれ
らの合金等の金属マトリックスを９０〜１０重量％を含
む窒化物系サーメット、 又は、硼化物を１０〜９０重量％、Ｎｉ、Ｃｒ、Ｃｏ又
はこれらの合金等の金属マトリックスを９０〜１０重量
％を含む硼化物系サーメットの何れか一つからなる請求
項１〜４のいずれか１項に記載の製鉄所原料用篩部材。5. The cermet fine powder forming the thermal spray coating is selected from any one or more selected from the group consisting of WC, CrC, TiC and SiC, and from the group consisting of Ni, Cr, Co and alloys thereof. Carbide-based cermet containing 10 to 90% by weight of carbide and 90 to 10% by weight of metal matrix such as Ni, Cr, Co or alloys thereof, and 10 to 90% by weight of oxide, Oxide-based cermet containing 90 to 10% by weight of a metal matrix such as Ni, Cr, Co or alloys thereof, 10 to 90% by weight of nitride, and 90% of metal matrix such as Ni, Cr, Co or alloys thereof. 10 to 90% by weight of a nitride-based cermet containing 10 to 10% by weight, or 90 to 10% by weight of a metal matrix such as Ni, Cr, Co or an alloy thereof. Ironworks feedstock sieve member according to claim 1 consisting of any one of boride cermet containing.
た溶射皮膜の厚みが０．１〜２ｍｍとなって、更に前記
小孔の内面にも０．１〜１ｍｍの溶射皮膜が形成されて
いる請求項１〜５のいずれか１項に記載の製鉄所原料用
篩部材。6. The sprayed coating formed on the surface of the metal sieve member body has a thickness of 0.1 to 2 mm, and a sprayed coating of 0.1 to 1 mm is formed on the inner surfaces of the small holes. The steel mill raw material sieve member according to any one of claims 1 to 5.
０００〜２７００ｍ／秒、火炎温度が２４００〜２７０
０℃の条件で行う請求項１〜６のいずれか１項に記載の
製鉄所原料用篩部材。7. The high speed flame spraying has a spray flame velocity of 2
000-2700 m / sec, flame temperature 2400-270
The sieve member for a steel mill raw material according to any one of claims 1 to 6, which is performed under a condition of 0 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8037257A JPH09220528A (en) | 1995-12-15 | 1996-01-30 | Screen component for raw material in iron and steel mill |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7-347661 | 1995-12-15 | ||
| JP34766195 | 1995-12-15 | ||
| JP8037257A JPH09220528A (en) | 1995-12-15 | 1996-01-30 | Screen component for raw material in iron and steel mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09220528A true JPH09220528A (en) | 1997-08-26 |
Family
ID=26376387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8037257A Withdrawn JPH09220528A (en) | 1995-12-15 | 1996-01-30 | Screen component for raw material in iron and steel mill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09220528A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100373227B1 (en) * | 1999-12-30 | 2003-03-03 | 주식회사 금양테크 | A screen net mineral sortor and production method thereof |
| JP2010100882A (en) * | 2008-10-22 | 2010-05-06 | Nippon Steel Corp | Wear resistant screen and method for producing the same |
| WO2010140336A1 (en) | 2009-06-05 | 2010-12-09 | 株式会社ツカサ | Cylindrical sieve and cylindrical shifter |
-
1996
- 1996-01-30 JP JP8037257A patent/JPH09220528A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100373227B1 (en) * | 1999-12-30 | 2003-03-03 | 주식회사 금양테크 | A screen net mineral sortor and production method thereof |
| JP2010100882A (en) * | 2008-10-22 | 2010-05-06 | Nippon Steel Corp | Wear resistant screen and method for producing the same |
| WO2010140336A1 (en) | 2009-06-05 | 2010-12-09 | 株式会社ツカサ | Cylindrical sieve and cylindrical shifter |
| US8733552B2 (en) | 2009-06-05 | 2014-05-27 | Tsukasa Co., Ltd. | Cylindrical sieve and cylindrical sifter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20030401 |