JP2857773B2 - Steelmaking machine process roll with excellent wear resistance - Google Patents
Steelmaking machine process roll with excellent wear resistanceInfo
- Publication number
- JP2857773B2 JP2857773B2 JP22419989A JP22419989A JP2857773B2 JP 2857773 B2 JP2857773 B2 JP 2857773B2 JP 22419989 A JP22419989 A JP 22419989A JP 22419989 A JP22419989 A JP 22419989A JP 2857773 B2 JP2857773 B2 JP 2857773B2
- Authority
- JP
- Japan
- Prior art keywords
- carbide
- wear resistance
- roll
- boride
- excellent wear
- 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.)
- Expired - Fee Related
Links
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
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。Description: TECHNICAL FIELD The present invention relates to a steelmaking machine and a process roll in a manufacturing process facility thereof.
（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
の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 of an iron making machine having 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７〜200μｍ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 abrasion resistance and heat resistance to the roll surface, a steelmaking machine process roll in which a coating containing Ni and chromium carbide and tungsten carbide, boride, etc. is formed mainly by spraying means, preferably a high-speed gas An object of the present invention is to provide a process roll having a small surface roughness, in which a sprayed layer having a thickness of 7 to 200 μm is formed on the roll surface by 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 the Problems) The gist of the present invention is as follows.
（１） ロール本体の厚さ200μｍ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 coating layer of the roll body having a thickness of 200 μm or less contains chromium carbide: 10 to 25% and Ni: 5 to 15% by weight.
An iron-wear machinery process roll having excellent wear resistance, characterized in that the balance comprises one or two of tungsten carbide and boride and unavoidable impurities.
（２） 前記表面皮膜層が、さらにチタン炭化物，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。(2) The surface coating layer further comprises one or more of titanium carbide, niobium carbide, zirconium carbide, titanium boride, zirconium boride, and the like, and is excellent in abrasion resistance according to item 1 above. Made steelmaking process rolls.
以下、本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail.
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、そのまゝ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 and high abrasion resistance, but it is difficult to fuse them to the roll surface.
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。Accordingly, Ni is deposited and embedded 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、所期の目的を達成したものである。In the present invention, the intended purpose has been achieved by examining a spraying method in which particles are sprayed at a high speed.
表面皮膜層の構成成分として、クロム炭化物は10〜25
％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。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。Chromium carbide is 10-25 as a component of the surface coating layer
%. 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 is lost and peeling tends to occur. Therefore, chromium carbide is limited to the above-mentioned 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,TiB2,ZrB2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 for stabilizing chromium carbide and improving wear resistance. However, when it is too large, the toughness of the surface film layer is reduced.Therefore, it is necessary to secure the amount of Ni as a matrix, further secure the necessary amount of chromium carbide, and then make the remainder of these carbides and borides. . Also, like tungsten carbide and boride, carbides and borides having high hardness and providing wear resistance are tungsten carbide,
It was confirmed that it could be replaced with a part of boride. For example, the surface coating layer according to the present invention may additionally contain one or more of NbC, TiC, ZrC, TiB 2 , ZrB 2 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Ni量が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 has been found that at least 5% is required to prevent loss of chromium carbide and tungsten carbide and to secure wear resistance and lubricity of the structure. However, when the Ni content exceeded 15%, the average hardness decreased and the wear resistance tended to decrease. Therefore Ni
The amount is limited to 5-15%.
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確認した。In the case of thermal spraying, the temperature of the thermal spray flame is a problem, but chromium carbide and tungsten carbide tend to be oxidized at a relatively low temperature. No. The present inventors have repeated experiments using various thermal spraying methods and have confirmed that a high-energy density high-speed gas thermal spraying method is suitable.
表面皮膜厚さの最適値も、若干溶射法によって変動す
るが、その最適範囲は７〜200μｍである。すなわち７
μｍ未満では耐摩耗、耐熱の用をなさないし、200μｍ
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 thickness also slightly varies depending on the thermal spraying method, but the optimum range is 7 to 200 μm. That is, 7
If it is less than μm, it will not be used for wear and heat resistance
When it exceeds, the residual stress in the coating layer becomes large,
It was recognized that the peeling was easy.
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, effects of the present invention will be described 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 shows a comparison between the surface coating layer having the component composition according to the present invention and the surface coating layer other than the present invention by the high-speed gas spraying method and the plasma spraying method.
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, in the plasma spraying method, the hardness and adhesion strength are slightly reduced even in the surface coating layer of the component composition according to the present invention, but in the high-speed gas spraying method, extremely excellent wear resistance and adhesion strength are 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 steelmaking machine process roll having a surface coating layer having excellent wear resistance, heat resistance, and adhesion strength.
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B21B 27/00 C23C 4/10Continuation of front page (58) Field surveyed (Int.Cl. 6 , DB name) B21B 27/00 C23C 4/10
Claims (2)
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. A surface coating layer of a roll body having a thickness of 200 μm or less contains chromium carbide: 10 to 25% and Ni: 5 to 15% by weight, and the balance is one or two of tungsten carbide and boride.
An iron-wear machinery process roll with excellent wear resistance, characterized by being composed of seeds and unavoidable impurities.
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 method according to claim 1, wherein said surface coating layer further comprises titanium carbide,
2. The process roll according to claim 1, wherein the roll comprises one or more of niobium carbide, zirconium carbide, titanium boride, zirconium boride and the like.
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 JPH0386306A (en) | 1991-04-11 |
| JP2857773B2 true 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) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0605175B1 (en) * | 1992-12-30 | 1997-08-13 | Praxair S.T. Technology, Inc. | A coated article and a method of coating said article |
| US5395221A (en) * | 1993-03-18 | 1995-03-07 | Praxair S.T. Technology, Inc. | Carbide or boride coated rotor for a positive displacement motor or pump |
| JP5306227B2 (en) | 2007-11-28 | 2013-10-02 | 新日鐵住金株式会社 | Hearth roll for continuous annealing furnace and manufacturing method thereof |
| WO2012168139A1 (en) * | 2011-06-10 | 2012-12-13 | Sulzer Metco Woka Gmbh | Tungsten-carbide-based spray powder, and a substrate with a tungsten-carbide-based thermally sprayed layer |
-
1989
- 1989-08-30 JP JP22419989A patent/JP2857773B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0386306A (en) | 1991-04-11 |
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