JPH0386306A - Process roll for iron making machine having excellent wear resistance - Google Patents
Process roll for iron making machine having excellent wear resistanceInfo
- Publication number
- JPH0386306A JPH0386306A JP22419989A JP22419989A JPH0386306A JP H0386306 A JPH0386306 A JP H0386306A JP 22419989 A JP22419989 A JP 22419989A JP 22419989 A JP22419989 A JP 22419989A JP H0386306 A JPH0386306 A JP H0386306A
- Authority
- JP
- Japan
- Prior art keywords
- wear resistance
- carbide
- roll
- thickness
- process roll
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title abstract 6
- 229910052742 iron Inorganic materials 0.000 title abstract 3
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910003470 tongbaite Inorganic materials 0.000 claims abstract description 12
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 3
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 3
- 239000010937 tungsten Substances 0.000 claims abstract description 3
- 239000010410 layer Substances 0.000 claims description 7
- 239000002345 surface coating layer Substances 0.000 claims description 7
- 229910026551 ZrC Inorganic materials 0.000 claims description 3
- OTCHGXYCWNXDOA-UHFFFAOYSA-N [C].[Zr] Chemical compound [C].[Zr] OTCHGXYCWNXDOA-UHFFFAOYSA-N 0.000 claims description 3
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 claims description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- UNASZPQZIFZUSI-UHFFFAOYSA-N methylidyneniobium Chemical compound [Nb]#C UNASZPQZIFZUSI-UHFFFAOYSA-N 0.000 claims description 2
- 238000009628 steelmaking Methods 0.000 claims description 2
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims description 2
- -1 tungsten carbides Chemical class 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 6
- 238000005507 spraying Methods 0.000 description 4
- 238000007751 thermal spraying Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- OFEAOSSMQHGXMM-UHFFFAOYSA-N 12007-10-2 Chemical compound [W].[W]=[B] OFEAOSSMQHGXMM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007750 plasma spraying Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Coating By Spraying Or Casting (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は製鉄機械およびその製造工程設備中のプロセス
ロールに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a steel making machine and a process roll in its manufacturing process equipment.
(発明が解決しようとする課題)
本発明の目的は、耐摩耗性、耐熱性の優れた製鉄機械プ
ロセスロールを提供しようとするものである。(Problems to be Solved by the Invention) An object of the present invention is to provide a process roll for iron-making machinery that has excellent wear resistance and heat resistance.
さらに詳しくは、ロール表面に耐摩耗性、耐熱性を付与
するために、主として溶射手段によりクロム炭化物およ
びタングステン炭化物、硼化物等とNiを含む皮膜を形
成させた製鉄機械プロセスロール、好ましくは高速ガス
溶射システムによりロール表面に7〜200nの厚さの
溶射層を形成した、表面粗度の小さいプロセスロールを
提供しようとするものである。More specifically, in order to impart wear resistance and heat resistance to the roll surface, a process roll for iron-making machinery, preferably a high-speed gas The present invention aims to provide a process roll with a small surface roughness, in which a thermal spray layer with a thickness of 7 to 200 nm is formed on the roll surface using a thermal spray system.
(課題を解決するための手段) 本発明の要旨とするところは、下記のとおりである。(Means for solving problems) The gist of the present invention is as follows.
(1)ロール本体の厚さ2004以下の表面皮膜層が重
量%でクロム炭化物:10〜25%、Ni:5〜15%
を含み、残部がタングステンの炭化物、硼化物の1種又
は2種と不可避不純物からなることを特徴とする耐摩耗
性に優れた製鉄機械プロセスロール。(1) The surface film layer of the roll body with a thickness of 2004 mm or less is chromium carbide: 10 to 25%, Ni: 5 to 15% by weight
A steel manufacturing machine process roll having excellent wear resistance, characterized in that the remainder consists of one or two of tungsten carbides and borides and unavoidable impurities.
(2)前記表面皮膜層が、さらにチタン炭化物。(2) The surface film layer is further made of titanium carbide.
ニオブ炭化物、ジルコニウム炭化物、チタン硼化物、ジ
ルコニウム硼化物等の1種または2種以上を含むことを
特徴とする前項1記載の耐摩耗性に優れた製鉄機械プロ
セスロール。1. A process roll for iron-making machinery with excellent wear resistance as described in 1 above, which contains one or more of niobium carbide, zirconium carbide, titanium boride, zirconium boride, and the like.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
クロム炭化物およびタングステン炭化物は硬度が高く、
耐摩耗性は高いが、そのま覧ではロール表面に溶着させ
ることはむづかしい。Chromium carbide and tungsten carbide have high hardness;
Although it has high abrasion resistance, it is difficult to weld it to the roll surface at first glance.
したがってNiをマトリックスとして溶着、埋蔵させる
が、普通のガス溶射等では高い密着強度が得られない。Therefore, Ni is welded and buried as a matrix, but high adhesion strength cannot be obtained by ordinary gas spraying or the like.
本発明ではとくに高速度で粒子を吹付ける溶射法で検討
し、所期の目的を遠戚したものである。In the present invention, we have studied a thermal spraying method in which particles are sprayed at high speed, and have achieved the intended purpose.
表面皮膜層の構成成分として、クロム炭化物は10〜2
5%する。クロム炭化物10%未満では所期の耐摩耗性
が得られず、25%を超えるときは皮膜の靭性が失われ
、剥離を起しやすくなる。As a component of the surface film layer, chromium carbide has a content of 10 to 2
5%. If the chromium carbide content is less than 10%, the desired wear resistance cannot be obtained, and if it exceeds 25%, the toughness of the film will be lost and peeling will occur easily.
したがってクロム炭化物については上記成分域に限定し
た。Therefore, chromium carbide was limited to the above component range.
タングステン炭化物、タングステン硼化物は硬度が高く
、耐摩耗性を与える。したがって本発明では、クロム炭
化物の安定化と、耐摩耗性向上のため、これらの化合物
を併用する。しかし多すぎるときは、表面皮膜層の靭性
の低下をきたすので、マトリックスとしてのNi量を確
保し、さらにクロム炭化物の必要量を確保した上で、残
りをこれら炭化物および硼化物とするものである。又タ
ングステン炭化物、硼化物と同様に、硬度が高く、耐摩
耗性を与える炭化物、硼化物は、タングステン炭化物、
硼化物の一部と置換しうることを確認した。例えば本発
明に従う表面皮膜層はNbC+ TiC+ZrC,Ti
Bg + Zrfh等の1種又は2種以上を追加的に含
み得るものである。Tungsten carbide and tungsten boride have high hardness and provide wear resistance. Therefore, in the present invention, these compounds are used in combination to stabilize chromium carbide and improve wear resistance. However, if it is too much, the toughness of the surface film layer will be reduced, so the method is to ensure the amount of Ni as a matrix and the necessary amount of chromium carbide, and then make the rest of these carbides and borides. . Also, similar to tungsten carbide and boride, carbide and boride which have high hardness and provide wear resistance are tungsten carbide,
It was confirmed that boride can be partially replaced. For example, the surface coating layer according to the present invention is NbC+TiC+ZrC, Ti
It may additionally contain one or more of Bg + Zrfh and the like.
Niはマトリックスのバインダー成分であり、クロム炭
化物、タングステン炭化物の欠落を防止し、組織の耐摩
耗性、潤滑性を確保するために、最低5%が必要なこと
が分った。しかしN1fiが15%を超えると平均硬度
が低下し、耐摩耗性も小さくなる傾向となった。したが
ってNi量は5〜15%と限定する。Ni is a binder component of the matrix, and it was found that a minimum content of 5% is required to prevent the loss of chromium carbide and tungsten carbide and to ensure wear resistance and lubricity of the structure. However, when N1fi exceeded 15%, the average hardness decreased and the wear resistance also tended to decrease. Therefore, the amount of Ni is limited to 5 to 15%.
又溶射による場合、溶射フレームの温度が問題となるが
、クロム炭化物、タングステン炭化物は比較的低温で酸
化される傾向にあるため、溶射フレームの速度、温度、
粒子の高温滞留時間に留意しなければならない。本発明
者らは種々の溶射法で実験を重ね、高エネルギー密度の
高速ガス溶射法が好適であることを1i!認した。In addition, when thermal spraying is used, the temperature of the thermal spray flame becomes a problem, but since chromium carbide and tungsten carbide tend to be oxidized at relatively low temperatures, the speed, temperature,
Attention must be paid to the high temperature residence time of the particles. The present inventors conducted repeated experiments with various thermal spraying methods, and found that high-energy density high-velocity gas spraying is suitable! Approved.
表面皮膜層厚さの最適値も、若干溶射法によって変動す
るが、その最適範囲は7〜2001rmである。すなわ
ち7trm未満では耐摩耗、耐熱の用をなさないし、2
00Qを超える場合には、皮膜層中の残留応力が大きく
なり、剥離し易くなることが認められた。The optimum value of the surface coating layer thickness also varies slightly depending on the thermal spraying method, but the optimum range is 7 to 2001 rm. In other words, if the speed is less than 7 trm, there is no use in wear resistance or heat resistance.
It was found that when it exceeds 00Q, the residual stress in the coating layer becomes large and it becomes easy to peel off.
次に本発明の効果について実施例に基づいて説明する。Next, the effects of the present invention will be explained based on examples.
第1表は本発明に従った成分組成の表面皮膜層と本発明
外の表面皮膜層について、高速ガス溶射法とプラズマ溶
射法での表面皮膜層特性を比較したものである。Table 1 compares the characteristics of the surface coating layer by high-velocity gas spraying method and plasma spraying method for a surface coating layer having a component composition according to the present invention and a surface coating layer other than the present invention.
これによると、プラズマ溶射法では、本発明に従った成
分組成の表面皮膜層でも硬度および密着強度が若干低下
するが、高速ガス溶射法では、極めてすぐれた耐摩耗性
と密着強度が得られることが分る。According to this, with the plasma spraying method, the hardness and adhesion strength are slightly reduced even with the surface coating layer having the composition according to the present invention, but with the high-velocity gas spraying method, extremely excellent wear resistance and adhesion strength can be obtained. I understand.
(発明の効果)
本発明によれば、耐摩耗性、耐熱性、密着強度に優れた
表面皮膜層を有する製鉄機械プロセスロールを提供する
ことができる。(Effects of the Invention) According to the present invention, it is possible to provide a process roll for iron-making machinery having a surface film layer with excellent wear resistance, heat resistance, and adhesion strength.
Claims (2)
重量%でクロム炭化物:10〜25%、Ni:5〜15
%を含み、残部がタングステンの炭化物、硼化物の1種
又は2種と不可避不純物からなることを特徴とする耐摩
耗性に優れた製鉄機械プロセスロール。(1) The surface coating layer of the roll body with a thickness of 200 μm or less is chromium carbide: 10 to 25%, Ni: 5 to 15% by weight.
%, and the remainder consists of one or two of tungsten carbides and borides and unavoidable impurities.
炭化物,ジルコニウム炭化物,チタン硼化物,ジルコニ
ウム硼化物等の1種または2種以上を含むことを特徴と
する請求項1記載の耐摩耗性に優れた製鉄機械プロセス
ロール。(2) The wear resistance according to claim 1, wherein the surface film layer further contains one or more of titanium carbide, niobium carbide, zirconium carbide, titanium boride, zirconium boride, etc. Excellent steelmaking machinery process roll.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22419989A JP2857773B2 (en) | 1989-08-30 | 1989-08-30 | Steelmaking machine process roll with excellent wear resistance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22419989A JP2857773B2 (en) | 1989-08-30 | 1989-08-30 | Steelmaking machine process roll with excellent wear resistance |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0386306A true JPH0386306A (en) | 1991-04-11 |
JP2857773B2 JP2857773B2 (en) | 1999-02-17 |
Family
ID=16810077
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22419989A Expired - Fee Related JP2857773B2 (en) | 1989-08-30 | 1989-08-30 | Steelmaking machine process roll with excellent wear resistance |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2857773B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06228728A (en) * | 1992-12-30 | 1994-08-16 | Praxair St Technol Inc | Article with wear resisting coating and method |
JPH06299973A (en) * | 1993-03-18 | 1994-10-25 | Praxair St Technol Inc | Rotor having carbide or boride coating for displacement type motor or pump |
WO2009069829A1 (en) | 2007-11-28 | 2009-06-04 | Nippon Steel Corporation | Hearth roll for continuous annealing furnace and process for production of the same |
JP2014523963A (en) * | 2011-06-10 | 2014-09-18 | スルザー メトコ ヴォカ ゲーエムベーハー | Spray powder mainly composed of tungsten carbide, and substrate having a thermal spray layer mainly composed of tungsten carbide |
-
1989
- 1989-08-30 JP JP22419989A patent/JP2857773B2/en not_active Expired - Fee Related
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06228728A (en) * | 1992-12-30 | 1994-08-16 | Praxair St Technol Inc | Article with wear resisting coating and method |
JPH06299973A (en) * | 1993-03-18 | 1994-10-25 | Praxair St Technol Inc | Rotor having carbide or boride coating for displacement type motor or pump |
WO2009069829A1 (en) | 2007-11-28 | 2009-06-04 | Nippon Steel Corporation | Hearth roll for continuous annealing furnace and process for production of the same |
US8864869B2 (en) | 2007-11-28 | 2014-10-21 | Nippon Steel & Sumitomo Metal Corporation | Hearth roll in a continuous annealing furnace and its production method |
JP2014523963A (en) * | 2011-06-10 | 2014-09-18 | スルザー メトコ ヴォカ ゲーエムベーハー | Spray powder mainly composed of tungsten carbide, and substrate having a thermal spray layer mainly composed of tungsten carbide |
US9624995B2 (en) | 2011-06-10 | 2017-04-18 | Oerlikon Metco Woka Gmbh | Tungsten-carbide-based spray powder, and a substrate with a tungsten-carbide-based thermally sprayed layer |
Also Published As
Publication number | Publication date |
---|---|
JP2857773B2 (en) | 1999-02-17 |
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