JPS59129754A - Chilled roll material with superior wear resistance - Google Patents
Chilled roll material with superior wear resistanceInfo
- Publication number
- JPS59129754A JPS59129754A JP481283A JP481283A JPS59129754A JP S59129754 A JPS59129754 A JP S59129754A JP 481283 A JP481283 A JP 481283A JP 481283 A JP481283 A JP 481283A JP S59129754 A JPS59129754 A JP S59129754A
- Authority
- JP
- Japan
- Prior art keywords
- chilled
- carbide
- wear resistance
- roll
- hardness
- 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
Landscapes
- Continuous Casting (AREA)
- Casting Devices For Molds (AREA)
Abstract
Description
【発明の詳細な説明】
木発明は鋳造複合ロールの外層材として用いられる耐摩
耗性の優れるチルドロール材に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chilled roll material having excellent wear resistance and used as an outer layer material of a cast composite roll.
例えば桑鋼仕上用ロールなどには、従来から複合チルド
ロールがよく使用されている。ここにおいて外層材とし
て用いられているチルド材質は、大計、下記の成分範囲
に属するものである。For example, composite chilled rolls have been commonly used as finishing rolls for mulberry steel. The chilled material used as the outer layer material here generally belongs to the following component range.
従来のチルド材化学成分（ｗｔ％ ）
ＯＳｉ Ｍｎ Ｐ
Ｓ Ｎｉ Ｏｒ Ｍ。Conventional chilled material chemical composition (wt%) OSi Mn P
S Ni Or M.
２．８〜８．６ ０．２〜０．６０．２〜０．７０．０
１〜０．４０ ０．０６以下２．０〜４．０１．０〜２
．６０．２−０．５しかし、上記成分範囲のチルドロー
ルでは、現状ではもはや耐摩耗性をそれ以上に向上させ
ることには限界を生じており、飛躍的に耐摩耗性を向上
できるロール材が希求されている。2.8~8.6 0.2~0.60.2~0.70.0
1-0.40 0.06 or less 2.0-4.0 1.0-2
．． 60.2-0.5 However, currently there is a limit to further improving the abrasion resistance of chilled rolls with the above composition range, and there is no roll material that can dramatically improve the abrasion resistance. It is desired.
そこで、この対策として案出されたのが超硬°合金の適
用であり、この材質をチルド材と置換するようにして複
合ロールの外層材に使用することも試みられている。し
かし乍ら、との超硬合金では従来のチルドロールに比較
して耐摩耗性に優れる反面、高価であり、それ故その適
用範囲が限られるのが難点である。Therefore, as a countermeasure to this problem, the application of cemented carbide has been devised, and attempts have also been made to use this material in the outer layer material of composite rolls by replacing it with chilled material. However, although cemented carbide has superior wear resistance compared to conventional chilled rolls, it is expensive and therefore has a drawback in that its range of application is limited.
このような技術的背景に鑑み、木発明は上記従来のチル
ド材質を成分的に改良し、その耐摩耗性の向上を企図し
たものであって、その特徴とするところは、複合ロール
の外層材として用いられるチルドロール材であって、
Ｃ２，８〜８．６チ Ｎ１ １．５〜Ｂ、５チ８１
０ｊ！ 〜０．６ ％ Ｏｒ ０．８〜２．０％
Ｍｎ ０．２〜０．７４ Ｍｏ １．０〜５．
０ ％Ｐ Ｏ１４チ以下
を各重量％で含み、残部Ｆｅおよび不純物からなる点に
ある。In view of this technical background, the invention of the tree aims to improve the composition of the conventional chilled material mentioned above and improve its abrasion resistance. Chilled roll material used as C2, 8 to 8.6 inches N1 1.5 to B, 5 inches 81
0j! ~0.6% Or 0.8~2.0%
Mn 0.2-0.74 Mo 1.0-5.
Each weight percent contains 0% P O or less than 14%, and the balance consists of Fe and impurities.
なお複合ロールの内層材については、従来と同様に高級
鋳鉄、ダクタイル鋳鉄等の強靭性に富んだ材質を選択的
に使用すればよく、またその製造方法としては常用の遠
心力鋳造によるのが好適である。As for the inner layer material of the composite roll, it is sufficient to selectively use materials with high toughness, such as high-grade cast iron and ductile cast iron, as in the past, and the preferred manufacturing method is the commonly used centrifugal casting. It is.
以下本発明に係るチルドロール材の成分限定理由につい
て述べる。The reasons for limiting the components of the chilled roll material according to the present invention will be described below.
Ｃは炭化物形成元素であり、耐摩耗性向上のため本材質
では２．８チ以上必要とする。しかしＣ量が高過ぎると
、炭化物が多過ぎて脆くなるため、８．６チを上限とす
る。C is a carbide-forming element, and in order to improve wear resistance, 2.8 or more carbon atoms are required in this material. However, if the amount of C is too high, there will be too many carbides and it will become brittle, so the upper limit is set at 8.6 inches.
Ｓｌは脱酸のため０．２チ以上は必要であるが、余り多
く含まれると黒鉛を晶出しチルド材の意味を失うため、
０．６チを上限とする。0.2 or more sl is necessary for deoxidation, but if too much sl is included, graphite will crystallize and the material will lose its meaning as a chilled material.
The upper limit is 0.6 inches.
Ｍｎは脱酸のためＳｌと同じ＜０．２％以上必要である
が、靭性の点から０，７％を上限とする。Mn is required to be <0.2% or more, the same as Sl, for deoxidation, but from the viewpoint of toughness, the upper limit is set at 0.7%.
Ｐは不可避的に含まれる範囲でも耐摩耗性に効果がある
が、添加して行くとさらによくなる反面靭性の点から上
限を０．４チとする。Although P has an effect on wear resistance even when it is unavoidably included, it becomes even better as it is added, but the upper limit is set at 0.4 inches from the viewpoint of toughness.
Ｎ１はマトリックスの硬度増加と強靭化のために１．５
％以上の含有が必要である。しかし余り多く含まれると
、後のＭＯ含有量にも影響されるが、ベーナイト量、マ
ルテンサイト量の過多および残留オーステナイト量の増
加をきたし好ましくなく、８石チを上限とする。N1 is 1.5 to increase the hardness and toughness of the matrix.
% or more is required. However, if it is contained in an excessively large amount, the amount of bainite and martensite will be excessive, and the amount of retained austenite will increase, although this will be influenced by the later MO content, which is not preferable, and the upper limit is set at 8 stones.
Ｏｒは炭化物の強化、黒鉛晶出の抑制およびマトリック
スの硬度増加のために０．８チ以上は必要である。しか
し多量に添加すると、材質の劣化が現われるため、２．
０％を上限とする。Or is required to be 0.8 or more in order to strengthen carbides, suppress graphite crystallization, and increase the hardness of the matrix. However, if a large amount is added, the quality of the material will deteriorate, so 2.
The upper limit is 0%.
ＭＯは炭化物への固溶による硬度増加、Ｍｏ、（３炭
゛化物形成等によシ耐摩耗性向上に寄与せしめるた
め、本材質では１，０％以上を必要とする。反面ＭＯ含
有量が多過ぎると、マトリックスに残留オーステナイが
現われるため、５．０％をその上限とする。MO increases hardness due to solid solution in carbide, Mo, (3 carbon
This material requires a content of 1.0% or more in order to contribute to improving wear resistance through the formation of compounds, etc. On the other hand, if the MO content is too high, residual austenite will appear in the matrix, so the upper limit is set at 5.0%.
本発明のロール材は以上の各成分を重量％で含み、その
他年可避的に含まれる不純物を除き、残部は実質的にＦ
ｅからなる。The roll material of the present invention contains each of the above components in weight percent, excluding other unavoidable impurities, and the remainder is substantially F.
Consists of e.
次に本発明の実施例を、従来チルド材と比較して下記に
示す。Next, examples of the present invention will be shown below in comparison with conventional chilled materials.
下表１に掲げる各種チルド材を、各々遠心力鋳造用金型
に、内径ｚ８ｏ”ｘ ２２ｏ ’ 、鋳込厚さ５０ｆｆ
で複合ロールの外層として鋳−４した。このロール試料
を各々４００℃Ｘ１０Ｈｒの歪取り処理し、各中央部か
ら採取した試験片の顕微鏡組織（６０倍）を同表（第１
図から第６図）に示す。なお表中、Ａ、Ｂは従来チルド
材質を、ａ−ｍは本発明に係るチルド材質を示す。Each of the chilled materials listed in Table 1 below was placed in a centrifugal casting mold with an inner diameter of z8o'' x 22o' and a casting thickness of 50ff.
It was cast as the outer layer of a composite roll. Each of these roll samples was strain-removed at 400°C for 10 hours, and the microscopic structure (60x magnification) of the test piece taken from the center of each sample was shown in the same table (see 1).
(Fig. 6). In the table, A and B indicate conventional chilled materials, and a-m indicate chilled materials according to the present invention.
また上記試験片を硬度測定試験、摩耗試験に供した。そ
の結果を第７図、第８図に示す。Further, the above test piece was subjected to a hardness measurement test and an abrasion test. The results are shown in FIGS. 7 and 8.
なお摩耗試験法は、１４’Ｘ７０’の試験片に８４５０
製の円盤（１６０’）で１０ｋｇの圧力をかけ、１５０
ｒｐｍで８０分間接触させることにより行った。In addition, the abrasion test method is to apply 8450 to a 14' x 70' test piece.
Apply a pressure of 10 kg with a disc (160') made of
This was done by contacting for 80 minutes at rpm.
表１ 各種チルド材質とその顕微鏡組織上記表１（第１
図〜第６図）および第７図よシ次のような事が判る。す
なわち、本発明に係る高ＭＯ含有量のチルド材質では、
ＭＯが炭化物中に固溶し炭化物硬度を上げていると共に
、ＭＯ，Ｏのような炭化物を形成し、高硬度の炭化物を
形成していることである。そして、これにより炭化物形
態を共晶炭化物から初晶炭化物に変え、炭化物の硬度を
上げると共に、結晶を微細化させている。試料Ｅ、Ｆは
この微細化傾向がよく現われている。Table 1 Various chilled materials and their microscopic structures Table 1 above (1st
From Figures 6 to 6) and Figure 7, the following can be seen. That is, in the chilled material with high MO content according to the present invention,
MO dissolves in the carbide and increases the hardness of the carbide, and also forms carbides such as MO and O to form a highly hard carbide. This changes the carbide form from eutectic carbide to primary crystal carbide, increases the hardness of the carbide, and makes the crystals finer. Samples E and F clearly exhibit this tendency to become finer.
ＭＯはさらにマトリックスにも固溶されるため、マトリ
ックス調整のためのＮｉ量を低下する。スナわち、Ｎｉ
含有量を低下しても、試料０− Ｆのマトリックス硬度
に見られる如く、若干の硬度上昇が得られる。Since MO is also dissolved in the matrix, the amount of Ni for matrix adjustment is reduced. Sunawachi, Ni
Even if the content is lowered, a slight increase in hardness can be obtained, as seen in the matrix hardness of sample 0-F.
この結果、材質全体としての硬度比較を行うと、従来の
試料Ａ、Ｂのものに比べて、本発明に係る試料０−Ｆの
ものでは高硬度化し、かつ結晶も微細化傾向を示してい
る。As a result, when comparing the hardness of the materials as a whole, compared to the conventional samples A and B, samples 0-F according to the present invention have higher hardness, and the crystals also tend to become finer. .
また摩耗試験結果によると、第８図に見る如く、本発明
に係るチルドロール材では実際に大幅な改善効果を示し
ている。Further, according to the results of the abrasion test, as shown in FIG. 8, the chilled roll material according to the present invention actually shows a significant improvement effect.
以上の如く、本発明のチルドロール材は従来のチルド材
質を成分面で改良し、特にそのＭＯ含有量を高めたこと
により、耐摩耗性の向上に顕著な改善効果を収めたもの
である。従って、この新しく開発されたロール外層材に
より形成した複合チルドロールを、条鋼仕上用ロール等
の圧延用ロールに使用すれば、比較的経済的にその使用
寿命を延長することができる。As described above, the chilled roll material of the present invention has improved the conventional chilled material in terms of composition, particularly by increasing its MO content, and has achieved a remarkable improvement in wear resistance. Therefore, if a composite chilled roll formed from this newly developed roll outer layer material is used for a rolling roll such as a roll for finishing long steel, the service life of the roll can be extended relatively economically.
第１図乃至第６図は各種チルド材質の組織を示す顕微鏡
写真であって、第１図と第２図は祥来材を、第８図、第
４図、第５図及び第６図は本発明の実施例材を示してい
る。第７図は各種チルド材試料についての硬度測定結果
を示す図である。第８図は各種チルド材試料についての
摩耗試験結果を示す図である。
特 許 出 願 人 久保田鉄工株式会社第７図
Ａ ＢＣＤＥ Ｆ
第８図Figures 1 to 6 are micrographs showing the structures of various chilled materials. An example material of the present invention is shown. FIG. 7 is a diagram showing hardness measurement results for various chilled material samples. FIG. 8 is a diagram showing the results of wear tests on various chilled material samples. Patent applicant Kubota Iron Works Co., Ltd. Figure 7 A BCDE F Figure 8
Claims (1)
材であって、 Ｃ２，８〜８，６チ Ｓｉ Ｏ，２〜０．６％ Ｍｎ ０．２〜０．７ ％ Ｐ Ｏ，４％以下 Ｎｉ １．５〜８．５チ Ｏｒ ０．８〜２．０ ％ Ｍｏ １．０〜５．０チ を各重量部で含み、残部Ｐｅおよび不純物からなること
を特徴とする耐摩耗性の優れるチルドロール材。[Claims] 1. A chilled roll material used as an outer layer material of a composite roll, comprising: C2,8-8,6% SiO, 2-0.6% Mn 0.2-0.7% P O, 4% or less Ni 1.5-8.5% Or 0.8-2.0% Mo 1.0-5.0% by weight, with the remainder consisting of Pe and impurities. Chilled roll material with excellent wear resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP481283A JPS59129754A (en) | 1983-01-12 | 1983-01-12 | Chilled roll material with superior wear resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP481283A JPS59129754A (en) | 1983-01-12 | 1983-01-12 | Chilled roll material with superior wear resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59129754A true JPS59129754A (en) | 1984-07-26 |
Family
ID=11594151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP481283A Pending JPS59129754A (en) | 1983-01-12 | 1983-01-12 | Chilled roll material with superior wear resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59129754A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007101512A1 (en) | 2006-03-09 | 2007-09-13 | Sms Demag Ag | Roll for metal processing, in particular a continuous casting roll, and method of producing such a roll |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4859026A (en) * | 1971-11-29 | 1973-08-18 | ||
| JPS57149450A (en) * | 1981-03-10 | 1982-09-16 | Nippon Steel Corp | Hot-mill roll excellent in wear-resistance and thermal fatigue-resistance |
| JPS57198242A (en) * | 1981-05-29 | 1982-12-04 | Kubota Ltd | Alloy chilled roll material with superior wear resistance |
-
1983
- 1983-01-12 JP JP481283A patent/JPS59129754A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4859026A (en) * | 1971-11-29 | 1973-08-18 | ||
| JPS57149450A (en) * | 1981-03-10 | 1982-09-16 | Nippon Steel Corp | Hot-mill roll excellent in wear-resistance and thermal fatigue-resistance |
| JPS57198242A (en) * | 1981-05-29 | 1982-12-04 | Kubota Ltd | Alloy chilled roll material with superior wear resistance |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007101512A1 (en) | 2006-03-09 | 2007-09-13 | Sms Demag Ag | Roll for metal processing, in particular a continuous casting roll, and method of producing such a roll |
| DE102006011384B4 (en) | 2006-03-09 | 2019-09-05 | Sms Group Gmbh | Roll for metalworking, in particular continuous casting roll |
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